handover measurement.pdf

GSM/EDGE BSS, Rel. RG20(BSS), Operating Documentation, Issue 04

Reference

4 Handover Measurement

DN9813636

Issue 13-1Approval Date 2011-04-07

Confidential

2 DN9813636Issue 13-1


Id:0900d8058080d1a6Confidential

The information in this document is subject to change without notice and describes only the product defined in the introduction of this documentation. This documentation is intended for the use of Nokia Siemens Networks customers only for the purposes of the agreement under which the document is submitted, and no part of it may be used, reproduced, modified or transmitted in any form or means without the prior written permission of Nokia Siemens Networks. The documentation has been prepared to be used by professional and properly trained personnel, and the customer assumes full responsibility when using it. Nokia Siemens Networks welcomes customer comments as part of the process of continuous development and improvement of the documentation.

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Copyright © Nokia Siemens Networks 2011. All rights reserved

f Important Notice on Product SafetyThis product may present safety risks due to laser, electricity, heat, and other sources of danger.

Only trained and qualified personnel may install, operate, maintain or otherwise handle this product and only after having carefully read the safety information applicable to this product.

The safety information is provided in the Safety Information section in the “Legal, Safety and Environmental Information” part of this document or documentation set.

The same text in German:

f Wichtiger Hinweis zur Produktsicherheit Von diesem Produkt können Gefahren durch Laser, Elektrizität, Hitzeentwicklung oder andere Gefahrenquellen ausgehen.

Installation, Betrieb, Wartung und sonstige Handhabung des Produktes darf nur durch geschultes und qualifiziertes Personal unter Beachtung der anwendbaren Sicherheits-anforderungen erfolgen.

Die Sicherheitsanforderungen finden Sie unter „Sicherheitshinweise“ im Teil „Legal, Safety and Environmental Information“ dieses Dokuments oder dieses Dokumentations-satzes.

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Table of contentsThis document has 275 pages.

Summary of changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1 4 Handover Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2 Counters of Handover Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . 282.1 004000 / MSC I SUCCESS HO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282.2 004001 / MSC I UNSUCCESS HO DUE LACK. . . . . . . . . . . . . . . . . . . 282.3 004002 / MSC I UNSUCCESS HO DUE CONN . . . . . . . . . . . . . . . . . . 292.4 004003 / MSC I UNSUCCESS HO DUE BSS PROBLEM. . . . . . . . . . . 302.5 004004 / MSC O SUCCESS HO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302.6 004005 / MSC O GEN HO REQUIRED MESSAGES . . . . . . . . . . . . . . 312.7 004006 / MSC O UNSUCCESS HO DUE RETURN . . . . . . . . . . . . . . . 322.8 004007 / MSC O END OF HO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332.9 004008 / MSC O END OF HO DUE BSS . . . . . . . . . . . . . . . . . . . . . . . 342.10 004009 / MSC O GEN HO COM MESSAGES . . . . . . . . . . . . . . . . . . . 342.11 004010 / BSC I SUCCESS HO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352.12 004011 / BSC I UNSUCCESS HO DUE LACK . . . . . . . . . . . . . . . . . . . 362.13 004012 / BSC I UNSUCCESS HO DUE CONN . . . . . . . . . . . . . . . . . . 372.14 004013 / BSC I UNSUCCESS HO DUE BSS PROBLEM . . . . . . . . . . . 382.15 004014 / BSC O SUCCESS HO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 392.16 004015 / BSC O UNSUCCESS HO DUE RETURN . . . . . . . . . . . . . . . 402.17 004016 / BSC O END OF HO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 412.18 004017 / BSC O END OF HO DUE BSS. . . . . . . . . . . . . . . . . . . . . . . . 422.19 004018 / INT CELL SUCCESS HO . . . . . . . . . . . . . . . . . . . . . . . . . . . . 422.20 004019 / INT CELL UNSUCCESS HO DUE LACK . . . . . . . . . . . . . . . . 432.21 004020 / INT CELL UNSUCCESS HO DUE MOVE . . . . . . . . . . . . . . . 442.22 004021 / INT CELL UNSUCCESS HO DUE BSS PROBLEM. . . . . . . . 452.23 004022 / INT CELL UNSUCCESS HO DUE RETURN . . . . . . . . . . . . . 462.24 004023 / CAUSE UPLINK QUALITY . . . . . . . . . . . . . . . . . . . . . . . . . . . 462.25 004024 / CAUSE UPLINK LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 472.26 004025 / CAUSE DOWNLINK QUALITY. . . . . . . . . . . . . . . . . . . . . . . . 472.27 004026 / CAUSE DOWNLINK LEVEL. . . . . . . . . . . . . . . . . . . . . . . . . . 482.28 004027 / CAUSE DISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 492.29 004028 / CAUSE RESPONSE TO MSC INVOCATION . . . . . . . . . . . . 492.30 004029 / CAUSE HIGH INT ON UPLINK . . . . . . . . . . . . . . . . . . . . . . . 502.31 004030 / CAUSE HIGH INT ON DOWNLINK . . . . . . . . . . . . . . . . . . . . 502.32 004031 / CAUSE UMBRELLA HO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 512.33 004032 / CAUSE POWER BUDGET HO. . . . . . . . . . . . . . . . . . . . . . . . 522.34 004033 / CAUSE HO STARTED BY OMC . . . . . . . . . . . . . . . . . . . . . . 522.35 004034 / CAUSE HO STARTED BY CHANNEL ADM . . . . . . . . . . . . . 532.36 004035 / CAUSE HO STARTED BY TRAFFIC REASON . . . . . . . . . . . 532.37 004036 / INT CELL HO NOT ALLOWED. . . . . . . . . . . . . . . . . . . . . . . . 542.38 004037 / MSC O HO NOT ALLOWED. . . . . . . . . . . . . . . . . . . . . . . . . . 552.39 004038 / BSC O HO NOT ALLOWED . . . . . . . . . . . . . . . . . . . . . . . . . . 552.40 004039 / INT CELL CALL CLEAR DURING HO . . . . . . . . . . . . . . . . . . 56

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2.41 004040 / MSC I CALL CLEAR DURING HO . . . . . . . . . . . . . . . . . . . . . 572.42 004041 / MSC O CALL CLEAR DURING HO. . . . . . . . . . . . . . . . . . . . . 572.43 004042 / BSC O CALL CLEAR DURING HO . . . . . . . . . . . . . . . . . . . . . 582.44 004043 / MSC I TCH TCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 592.45 004044 / MSC I SDCCH TCH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 592.46 004045 / MSC I SDCCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 602.47 004046 / MSC I TCH TCH AT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 612.48 004047 / MSC I SDCCH TCH AT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 612.49 004048 / MSC I SDCCH AT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 622.50 004049 / MSC O TCH TCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 622.51 004050 / MSC O SDCCH TCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 632.52 004051 / MSC O SDCCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 642.53 004052 / MSC O TCH TCH AT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 642.54 004053 / MSC O SDCCH TCH AT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 652.55 004054 / MSC O SDCCH AT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 652.56 004055 / MSC O FAIL LACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 662.57 004056 / BSC I TCH TCH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 662.58 004057 / BSC I SDCCH TCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 672.59 004058 / BSC I SDCCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 682.60 004059 / BSC I TCH TCH AT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 682.61 004060 / BSC I SDCCH TCH AT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 692.62 004061 / BSC I SDCCH AT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 702.63 004062 / BSC I NONOPT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 702.64 004063 / BSC I NONOPT AT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 712.65 004064 / BSC O TCH TCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 712.66 004065 / BSC O SDCCH TCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 722.67 004066 / BSC O SDCCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 732.68 004067 / BSC O TCH TCH AT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 732.69 004068 / BSC O SDCCH TCH AT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 742.70 004069 / BSC O SDCCH AT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 752.71 004070 / BSC O NONOPT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 752.72 004071 / BSC O NONOPT AT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 762.73 004072 / BSC O FAIL LACK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 772.74 004073 / CELL TCH TCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 772.75 004074 / CELL SDCCH TCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 782.76 004075 / CELL SDCCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 792.77 004076 / CELL TCH TCH AT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 792.78 004077 / CELL SDCCH TCH AT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 802.79 004078 / CELL SDCCH AT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 802.80 004079 / CAUSE DIR RETRY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 812.81 004080 / MSC I END OF HO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 812.82 004081 / BSC I END OF HO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 822.83 004082 / BSC O MS REQ ENQ PROC . . . . . . . . . . . . . . . . . . . . . . . . . 832.84 004083 / BSC I DROP CALLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 842.85 004084 / BSC O DROP CALLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 852.86 004085 / CELL DROP CALLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 862.87 004086 / CAUSE PREEMPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

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2.88 004087 / CAUSE FIELD DROP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 872.89 004088 / CAUSE LOW DISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 872.90 004089 / CAUSE BAD CI RATIO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 882.91 004090 / CAUSE GOOD CI RATIO. . . . . . . . . . . . . . . . . . . . . . . . . . . . 892.92 004091 / HO DUE SLOW MOV MS. . . . . . . . . . . . . . . . . . . . . . . . . . . . 892.93 004092 / MSC I ATT SWITCH CIRC POOL . . . . . . . . . . . . . . . . . . . . . 902.94 004093 / MSC I SUCC SWITCH CIRC POOL. . . . . . . . . . . . . . . . . . . . 912.95 004094 / MSC O ATT SWITCH CIRC POOL . . . . . . . . . . . . . . . . . . . . 912.96 004095 / MSC O SUCC SWITCH CIRC POOL. . . . . . . . . . . . . . . . . . . 922.97 004096 / BSC O UNSUCC A INT CIRC TYPE . . . . . . . . . . . . . . . . . . . 932.98 004097 / BSC I UNSUCC A INT CIRC TYPE . . . . . . . . . . . . . . . . . . . . 942.99 004098 / INT UNSUCC A INT CIRC TYPE . . . . . . . . . . . . . . . . . . . . . . 942.100 004099 / HO ATT DUE SWITCH CIRC POOL . . . . . . . . . . . . . . . . . . . 952.101 004100 / MSC O ADJ CELL ID ERR . . . . . . . . . . . . . . . . . . . . . . . . . . . 962.102 004101 / MSC I UNSUCC DUE A IF CRC. . . . . . . . . . . . . . . . . . . . . . . 962.103 004102 / MSC O UNSUCC DUE A IF CRC. . . . . . . . . . . . . . . . . . . . . . 972.104 004103 / HO FROM NORMAL TO EXT AREA . . . . . . . . . . . . . . . . . . . 982.105 004104 / HO FROM EXT TO NORMAL AREA . . . . . . . . . . . . . . . . . . . 982.106 004105 / HO DUE TO MS SLOW SPEED. . . . . . . . . . . . . . . . . . . . . . . 992.107 004106 / HO DUE TO MS HIGH SPEED . . . . . . . . . . . . . . . . . . . . . . . 992.108 004107 / MSC O CALL DROP DURING HO . . . . . . . . . . . . . . . . . . . . 1002.109 004108 / MSC I CALL POSS DROP DURING HO . . . . . . . . . . . . . . . 1012.110 004109 / HO ATT DUE TO BAD RXLEV ON SUPER . . . . . . . . . . . . . 1022.111 004110 / HO ATT DUE TO GOOD RXLEV ON REGULAR. . . . . . . . . 1022.112 004111 / HO ATT DUE ERFD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1032.113 004112 / MSC O ATT FOR HSCSD . . . . . . . . . . . . . . . . . . . . . . . . . . 1032.114 004113 / MSC O SUCC FOR HSCSD. . . . . . . . . . . . . . . . . . . . . . . . . 1042.115 004114 / MSC I ATT FOR HSCSD . . . . . . . . . . . . . . . . . . . . . . . . . . . 1052.116 004115 / MSC I SUCC FOR HSCSD. . . . . . . . . . . . . . . . . . . . . . . . . . 1052.117 004116 / MSC I SUCC INC FOR HSCSD . . . . . . . . . . . . . . . . . . . . . . 1062.118 004117 / MSC I SUCC DEC FOR HSCSD . . . . . . . . . . . . . . . . . . . . . 1072.119 004118 / BSC O ATT FOR HSCSD. . . . . . . . . . . . . . . . . . . . . . . . . . . 1072.120 004119 / BSC O SUCC FOR HSCSD . . . . . . . . . . . . . . . . . . . . . . . . . 1082.121 004120 / BSC I ATT FOR HSCSD. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1092.122 004121 / BSC I SUCC FOR HSCSD . . . . . . . . . . . . . . . . . . . . . . . . . . 1092.123 004122 / BSC I SUCC INC FOR HSCSD . . . . . . . . . . . . . . . . . . . . . . 1102.124 004123 / BSC I SUCC DEC FOR HSCSD. . . . . . . . . . . . . . . . . . . . . . 1102.125 004124 / INTRA ATT FOR HSCSD . . . . . . . . . . . . . . . . . . . . . . . . . . . 1112.126 004125 / INTRA SUCC FOR HSCSD . . . . . . . . . . . . . . . . . . . . . . . . . 1122.127 004126 / INTRA SUCC INC FOR HSCSD. . . . . . . . . . . . . . . . . . . . . . 1122.128 004127 / INTRA SUCC DEC FOR HSCSD . . . . . . . . . . . . . . . . . . . . . 1132.129 004128 / HO ATT DUE TO DIRECT ACCESS . . . . . . . . . . . . . . . . . . 1132.130 004129 / HO ATT DUE TO DADLB . . . . . . . . . . . . . . . . . . . . . . . . . . . 1142.131 004130 / HO ATT DUE TO GPRS. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1152.132 004131 / INTRA CELL SUCCESS SDCCH HO BETWEEN BTSS . . . 1152.133 004132 / INTRA CELL SUCCESS TCH HO BETWEEN BTSS. . . . . . 1162.134 004133 / HO ATTEMPT INTER BAND SDCCH . . . . . . . . . . . . . . . . . 116

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2.135 004134 / INTRA CELL SUCCESS SDCCH HO BETWEEN BANDS . . 1172.136 004135 / HO ATTEMPT INTER BAND TCH. . . . . . . . . . . . . . . . . . . . . 1182.137 004136 / INTRA CELL SUCCESS TCH HO BETWEEN BANDS. . . . . 1182.138 004137 / HO ATTEMPT INTER BTS TYPE SDCCH . . . . . . . . . . . . . . 1192.139 004138 / INTRA CELL SUCCESS SDCCH HO BETWEEN BTS TYPES .

1202.140 004139 / HO ATTEMPT INTER BTS TYPE TCH . . . . . . . . . . . . . . . . . 1202.141 004140 / INTRA CELL SUCCESS TCH HO BETWEEN BTS TYPES . 1212.142 004141 / HO ATT DUE TO HSCSD . . . . . . . . . . . . . . . . . . . . . . . . . . . 1222.143 004142 / HO ATT FOR AMR TO HR . . . . . . . . . . . . . . . . . . . . . . . . . . 1222.144 004143 / HO ATT FOR AMR TO FR . . . . . . . . . . . . . . . . . . . . . . . . . . 1232.145 004144 / MSC I TCH HO FROM WCDMA RAN ATTEMPT . . . . . . . . . 1232.146 004145 / MSC I WCDMA RAN HO ATTEMPT UNSUCC DUE LACK . 1242.147 004146 / MSC I WCDMA RAN HO ATTEMPT UNSUCC DUE BSS PROB-

LEM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1242.148 004147 / MSC I WCDMA RAN END OF HO . . . . . . . . . . . . . . . . . . . . 1252.149 004148 / MSC I UNSUCCESS HO WCDMA RAN DUE CONN . . . . . . 1262.150 004149 / MSC I HO WCDMA RAN TCH SUCCESS . . . . . . . . . . . . . . 1262.151 004150 / MSC O TCH HO TO WCDMA RAN ATTEMPT . . . . . . . . . . . 1272.152 004151 / MSC O HO TO WCDMA RAN NOT ALLOWED . . . . . . . . . . 1272.153 004152 / MSC O END OF HO TO WCDMA RAN DUE BSS . . . . . . . . 1282.154 004153 / MSC O GEN INTER SYSTEM TO WCDMA RAN HANDOVER

REQ MESSAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1282.155 004154 / MSC O GEN INTER SYSTEM TO WCDMA RAN HANDOVER

COM MESSAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1292.156 004155 / MSC O TO WCDMA RAN FAIL LACK. . . . . . . . . . . . . . . . . . 1302.157 004156 / MSC O END OF HO TO WCDMA RAN. . . . . . . . . . . . . . . . . 1302.158 004157 / MSC O CALL DROP DURING HO TO WCDMA RAN. . . . . . 1312.159 004158 / MSC O TO WCDMA RAN SUCCESS TCH HO . . . . . . . . . . 1322.160 004159 / SUCCESSFUL HO INTER BAND TCH . . . . . . . . . . . . . . . . . 1322.161 004160 / SUCCESSFUL HO INTER BTS TYPE TCH . . . . . . . . . . . . . 1332.162 004161 / UNSUCCESSFUL HO INTER BAND TCH . . . . . . . . . . . . . . 1342.163 004162 / UNSUCCESSFUL HO INTER BTS TYPE TCH. . . . . . . . . . . 1342.164 004163 / HO ATTEMPT INTER BAND DUE LEVEL . . . . . . . . . . . . . . 1352.165 004164 / UNSUCC HO INTER BAND DUE LEVEL . . . . . . . . . . . . . . . 1362.166 004165 / SUCC HO INTER BAND DUE LEVEL. . . . . . . . . . . . . . . . . . 1362.167 004166 / INTER SEGMENT SUCCESS SDCCH HO BETWEEN BANDS.

1372.168 004167 / INTER SEGMENT SUCCESS SDCCH HO BETWEEN BTS

TYPES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1382.169 004168 / INTER SEGMENT SUCCESS TCH HO BETWEEN BANDS 1382.170 004169 / INTER SEGMENT SUCCESS TCH HO BETWEEN BTS TYPES

1392.171 004170 / HO CAUSE DUE TO POOL SWITCHING . . . . . . . . . . . . . . . 1402.172 004171 / AMR UNPACKING HO ATTEMPT DUE TO RX LEVEL . . . . 1422.173 004172 / MSC I IURG TCH HO ATTEMPT . . . . . . . . . . . . . . . . . . . . . 1422.174 004173 / MSC I IURG TCH HO SUCCESS . . . . . . . . . . . . . . . . . . . . . 1432.175 004174 / MSC I HO FROM INTER PLMN INTRA GSM ATT . . . . . . . . 143

DN9813636 7



2.176 004175 / MSC I HO FROM INTER PLMN INTRA GSM SUCC . . . . . . 1442.177 004176 / MSC I HO FROM INTER PLMN INTRA GSM FAIL . . . . . . . 1442.178 004177 / MSC O HO FROM INTER PLMN INTRA GSM ATT. . . . . . . 1452.179 004178 / MSC O HO FROM INTER PLMN INTRA GSM SUCC . . . . . 1452.180 004179 / MSC O HO FROM INTER PLMN INTRA GSM FAIL . . . . . . 1462.181 004180 / HO ATTEMPT DUE TO ISHO . . . . . . . . . . . . . . . . . . . . . . . 1462.182 004181 / HO ATTEMPT DUE TO INTER SYSTEM DIRECT ACCESS 1472.183 004182 / MSC O SDCCH TCH HO TO WCDMA RAN ATTEMPT . . . 1482.184 004183 / MSC O SDCCH TCH TO WCDMA RAN SUCCESS HO . . . 1482.185 004184 / BSC I INTERNAL HO TO EXTERNAL . . . . . . . . . . . . . . . . . 1492.186 004185 / BSC O INTERNAL HO TO EXTERNAL . . . . . . . . . . . . . . . . 1502.187 004186 / MSC I INTERNAL HO TO EXTERNAL. . . . . . . . . . . . . . . . . 1502.188 004187 / MSC O INTERNAL HO TO EXTERNAL. . . . . . . . . . . . . . . . 1512.189 004188 / INTERNAL INTRA CELL HO TO EXTERNAL . . . . . . . . . . . 1512.190 004189 / MSC I UNSUCCESSFUL IURG HO DUE HO REQUEST DELAY

1522.191 004190 / DTM MS HO ATTEMPTS TO DTM CELL . . . . . . . . . . . . . . 1522.192 004191 / DTM MS HO SUCCEEDED TO DTM CELL . . . . . . . . . . . . . 1532.193 004192 / DTM MS HO ATTEMPTS TO NON DTM CELL . . . . . . . . . . 1532.194 004193 / DTM MS HO SUCCEEDED TO NON DTM CELL . . . . . . . . 1542.195 004194 / DTM CALL HO FROM DTM CELL SUCCEEDED . . . . . . . . 1542.196 004195 / DTM HO DUE LACK OF RESOURCES. . . . . . . . . . . . . . . . 1552.197 004196 / NON DTM BASED ISHO ATTEMPT . . . . . . . . . . . . . . . . . . 1562.198 004197 / NON DTM BASED ISHO SUCCESS . . . . . . . . . . . . . . . . . . 1562.199 004198 / DTM CALL HO ATTEMPTS TO DTM CELL. . . . . . . . . . . . . 1572.200 004199 / DTM CALL HO SUCCESS TO DTM CELL. . . . . . . . . . . . . . 1572.201 004200 / DTM CALL HO ATTEMPTS TO NON DTM CELL . . . . . . . . 1582.202 004201 / DTM CALL HO SUCCESS TO NON DTM CELL . . . . . . . . . 1592.203 004202 / BSC I INTERNAL HO TO EXTERNAL SUCCESSFUL . . . . 1592.204 004203 / BSC O INTERNAL HO TO EXTERNAL SUCCESSFUL . . . 1602.205 004204 / INTRA CELL TCH HO TO EXTERNAL SUCCESSFUL . . . . 1602.206 004205 / HO AMR FR TO HR SUCCESSFUL . . . . . . . . . . . . . . . . . . 1612.207 004206 / HO AMR HR TO FR SUCCESSFUL . . . . . . . . . . . . . . . . . . 1622.208 004207 / MSC I UNSUCCESSFUL HO FROM WCDMA RAN DUE POOL

SWITCHING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1622.209 004208 / MSC I SUCCESSFUL HO FROM WCDMA RAN POOL SWITCH-

ING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1632.210 004209 / IURG HO REQUEST AFTER MS ON TARGET CHANNEL. 1632.211 004210 / SPARE004210 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1642.212 004211 / SPARE004211 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1642.213 004212 / SPARE004212 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1652.214 004213 / SPARE004213 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1652.215 004214 / SPARE004214 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1662.216 004215 / HO ATTEMPT FROM LRTCH TO NORMAL AREA. . . . . . . 1662.217 004216 / HO FROM LRTCH TO NORMAL AREA SUCCESSFUL . . . 1672.218 004217 / HO ATTEMPT FROM LRTCH TO EXTENDED AREA. . . . . 1672.219 004218 / HO FROM LRTCH TO EXTENDED AREA SUCCESSFUL . 1682.220 004219 / HO ATTEMPT DUE TO IBHO TO GSM . . . . . . . . . . . . . . . . 168

8 DN9813636



2.221 004220 / HO ATTEMPT DUE TO IBHO TO UTRAN . . . . . . . . . . . . . . 1692.222 004221 / HO ATTEMPT DUE TO INT HO TO EXT . . . . . . . . . . . . . . . 1692.223 004222 / HO ATTEMPT DUE TO DTM MO CS TO PS . . . . . . . . . . . . 1702.224 004223 / HO ATTEMPT DUE TO DTM MT CS TO PS . . . . . . . . . . . . 1702.225 004224 / HO ATTEMPT DUE TO DTM MT PS TO PS. . . . . . . . . . . . . 1712.226 004225 / HO ATTEMPT DUE TO DTM PS TO CS. . . . . . . . . . . . . . . . 1712.227 004226 / HO ATTEMPT DUE TO DTM DISABLED . . . . . . . . . . . . . . . 1722.228 004227 / HO ATTEMPT DUE TO PCU QUAL CONTROL . . . . . . . . . . 1722.229 004228 / HO ATTEMPT DUE TO DTM NO PS RES AVAIL. . . . . . . . . 1732.230 004229 / HO ATTEMPT FROM EXTENDED TO SUPER EXTENDED

AREA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1732.231 004230 / HO FROM EXTENDED TO SUPER EXTENDED AREA SUC-

CESSFUL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1742.232 004231 / HO ATTEMPT FROM SUPER EXTENDED TO EXTENDED

AREA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1742.233 004232 / HO FROM SUPER EXTENDED TO EXTENDED AREA SUC-

CESSFUL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1752.234 004233 / HO ATTEMPT FROM LRTCH TO SUPER EXTENDED AREA .

1752.235 004234 / HO FROM LRTCH TO SUPER EXTENDED AREA SUCCESS-

FUL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1762.236 004235 / HO ATTEMPT FROM AMR HR TO DHR . . . . . . . . . . . . . . . 1762.237 004236 / HO ATTEMPT FROM AMR FR TO DHR. . . . . . . . . . . . . . . . 1772.238 004237 / HO FROM AMR HR TO DHR SUCCESSFUL. . . . . . . . . . . . 1772.239 004238 / HO FROM AMR FR TO DHR SUCCESSFUL . . . . . . . . . . . . 1782.240 004239 / INT CELL UNSUCCESS HO TO DHR DUE TO CSDAP MIS-

MATCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1782.241 004240 / HO ATTEMPT FROM DHR DUE TO RX QUALITY . . . . . . . 1792.242 004241 / HO ATTEMPT FROM DHR DUE TO UL RX LEVEL DIFFER-

ENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1802.243 004242 / HO FROM DHR DUE TO RX QUALITY SUCCESSFUL . . . . 1802.244 004243 / HO FROM DHR DUE TO UL RX LEVEL DIFFERENCE SUC-

CESSFUL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1812.245 004244 / BSS INTERNAL HANDOVER REQUIRED REQUESTS. . . . 1812.246 004245 / BSS INTERNAL HANDOVER COMMANDS . . . . . . . . . . . . . 1822.247 004246 / BSS INTERNAL HANDOVER FAILURES . . . . . . . . . . . . . . . 1822.248 004247 / BSS INTERNAL HANDOVER REQUIRED REJECTIONS . . 1832.249 004248 / BSS INTERNAL HANDOVER SUCCESSFUL . . . . . . . . . . . 1842.250 004249 / BSS INTERNAL HANDOVER ENQUIRY . . . . . . . . . . . . . . . 1842.251 004250 / BSS INTERNAL HANDOVER ENQUIRY REJECTIONS . . . 1852.252 004251 / HO ATTEMPT FROM DHR DUE TO RX LEVEL. . . . . . . . . . 1852.253 004252 / HO FROM DHR DUE TO RX LEVEL SUCCESSFUL . . . . . . 1862.254 004253 / SPARE004253. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1862.255 004254 / SPARE004254. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1872.256 004255 / SPARE004255. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1872.257 004256 / SPARE004256. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1882.258 004257 / SPARE004257. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1882.259 004258 / SPARE004258. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

DN9813636 9



2.260 004259 / HO ATTEMPT FROM AMR FR TO DFR IN 8K TRAU MODE . . 189

2.261 004260 / HO FROM AMR FR TO DFR IN 8K TRAU MODE SUCCESSFUL190

2.262 004261 / HO ATTEMPT FROM AMR FR TO DFR . . . . . . . . . . . . . . . 1902.263 004262 / HO FROM AMR FR TO DFR SUCCESSFUL. . . . . . . . . . . . 1912.264 004263 / INT CELL UNSUCCESS HO TO DFR DUE TO CSDAP MIS-

MATCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1912.265 004264 / HO ATTEMPT FROM DFR DUE TO RX QUALITY . . . . . . . 1922.266 004265 / HO ATTEMPT FROM DFR DUE TO UL RX LEVEL DIFFER-

ENCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1922.267 004266 / HO ATTEMPT FROM DFR DUE TO RX LEVEL . . . . . . . . . 1932.268 004267 / HO FROM DFR DUE TO RX QUALITY SUCCESSFUL . . . 1932.269 004268 / HO FROM DFR DUE TO UL RX LEVEL DIFFERENCE SUC-

CESSFUL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1942.270 004269 / HO FROM DFR DUE TO RX LEVEL SUCCESSFUL. . . . . . 195

3 Signalling charts of Handover Measurement . . . . . . . . . . . . . . . . . . . . 196

4 Signalling charts of Dual Transfer Mode . . . . . . . . . . . . . . . . . . . . . . . 255

10 DN9813636



List of figuresFigure 1 Successful internal intra-cell TCH to TCH handover . . . . . . . . . . . . . . 196Figure 2 Successful internal inter-cell TCH to TCH handover . . . . . . . . . . . . . . 197Figure 3 Successful external TCH to TCH handover, source BSC. . . . . . . . . . . 198Figure 4 Successful external TCH to TCH handover, target BSC . . . . . . . . . . . 199Figure 5 Successful internal intra-cell SDCCH to SDCCH handover . . . . . . . . . 200Figure 6 Successful internal inter-cell SDCCH to SDCCH handover . . . . . . . . . 201Figure 7 Successful external SDCCH to SDCCH handover, source BSC . . . . . 202Figure 8 Successful external SDCCH to SDCCH handover, target BSC . . . . . . 203Figure 9 Internal intra-cell directed retry including BSS6114: TCH assignment to the

super-reuse TRX in IUO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204Figure 10 Internal inter-cell directed retry, including BSS6114 TCH assignment to the

super-reuse TRX in IUO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205Figure 11 External directed retry, source BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . 206Figure 12 External directed retry, target BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207Figure 13 Unsuccessful internal intra-cell TCH to TCH handover due to a lack of re-

sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208Figure 14 Unsuccessful internal inter-cell TCH to TCH handover due to a lack of re-

sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208Figure 15 Unsuccessful external TCH to TCH handover due to a lack of resources,

source BSC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209Figure 16 Unsuccessful external TCH to TCH handover due to a lack of resources,

target BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209Figure 17 Unsuccessful internal intra-cell TCH to TCH handover because a handover

is not allowed at this phase of the call . . . . . . . . . . . . . . . . . . . . . . . . . 210Figure 18 Unsuccessful internal inter-cell TCH to TCH handover because a handover

is not allowed at this phase of the call . . . . . . . . . . . . . . . . . . . . . . . . . 211Figure 19 Unsuccessful external TCH to TCH handover because a handover is not

allowed, source BSC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211Figure 20 Unsuccessful internal intra-cell TCH to TCH handover due to a failure in the

activation of a new channel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212Figure 21 Unsuccessful internal inter-cell TCH to TCH handover due to a failure in the

activation of a new channel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212Figure 22 Unsuccessful external TCH to TCH handover due to a failure in the activa-

tion of a new channel, target BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213Figure 23 Unsuccessful internal intra-cell TCH to TCH handover due to losing the MS

during handover. The GSM timer T3107 expires. . . . . . . . . . . . . . . . . . 214Figure 24 Unsuccessful internal inter-cell TCH to TCH handover due to losing the MS

during handover. The GSM timer T3103 expires. . . . . . . . . . . . . . . . . . 215Figure 25 Unsuccessful internal intra-cell TCH to TCH handover due to MS returning

to the old channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216Figure 26 Unsuccessful internal inter-cell TCH to TCH handover due to MS returning

to the old channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217Figure 27 Unsuccessful external TCH to TCH handover due to MS returning to the

old channel, source BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218Figure 28 Unsuccessful external TCH to TCH handover due to MS returning to the

old channel, target BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219Figure 29 Unsuccessful internal intra-cell TCH to TCH handover due to call clearing

during handover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

DN9813636 11



Figure 30 Unsuccessful internal inter-cell TCH to TCH handover due to call clearing during handover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221

Figure 31 Unsuccessful external TCH to TCH handover due to call clearing during handover, source BSC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222

Figure 32 Unsuccessful internal intra-cell TCH to TCH handover because no radio re-sources are available due to switch_crc_pool . . . . . . . . . . . . . . . . . . . 223

Figure 33 Unsuccessful internal inter-cell TCH to TCH handover because no radio re-sources are available due to switch_crc_pool . . . . . . . . . . . . . . . . . . . 223

Figure 34 Unsuccessful external TCH to TCH handover because no radio resources are available due to switch_crc_pool, target BSC . . . . . . . . . . . . . . . . 224

Figure 35 Internal intra-cell handover change to external due to circuit pool switching, source side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225

Figure 36 Internal intra-cell handover change to external due to circuit pool switching, target side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226

Figure 37 Successful handover type reselection from an internal inter-cell TCH to TCH handover to an external handover due to switching the circuit pool . 227

Figure 38 Internal inter-cell handover change to external handover due to circuit pool switching, target-cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228

Figure 39 Unsuccessful external TCH to TCH handover because the MSC rejects the handover due to various causes, source BSC. . . . . . . . . . . . . . . . . . . 229

Figure 40 Unsuccessful external TCH to TCH handover due to GSM timer T8 expiry, source BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230

Figure 41 Unsuccessful external TCH to TCH handover due to adjacent cell error, source BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231

Figure 42 Unsuccessful internal intra-cell TCH to TCH handover, caused by an inter-nal timer expiry in the BSC or a CONNECTION_FAILURE, ERROR_INDICATION, or ERROR_REPORT message coming to the tar-get channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232

Figure 43 Unsuccessful internal inter-cell TCH to TCH handover due to a radio link failure during handover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

Figure 44 Unsuccessful internal inter-cell TCH to TCH handover caused by internal timer expiry or a failure in the connection of a bi-directional speech path . 234

Figure 45 Unsuccessful external TCH to TCH handover due to a radio link failure dur-ing handover, source BSC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

Figure 46 Unsuccessful external TCH to TCH handover due to a radio link failure dur-ing handover, target BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236

Figure 47 Unsuccessful external TCH or TCH handover, source BSC . . . . . . . . 237Figure 48 Unsuccessful external TCH to TCH handover, target BSC . . . . . . . . . 238Figure 49 Successful internal intra-cell TCH TCH HSCSD handover from two to one

channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239Figure 50 Successful internal intra-cell TCH TCH HSCSD handover from one to three

channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240Figure 51 Successful internal inter-cell TCH TCH HSCSD handover from three to one

channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241Figure 52 Successful internal inter-cell TCH TCH HSCSD handover from two to three

channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242Figure 53 Successful external TCH TCH HSCSD handover from two to two channels,

source BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243Figure 54 Successful external TCH TCH HSCSD handover from four to one channel,

12 DN9813636



target BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244Figure 55 Successful external TCH TCH HSCSD handover from one to two channels,

target BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245Figure 56 Internal intra-cell direct access from regular DCCH to a super-reuse TRX

246Figure 57 Internal inter-cell direct access from the TCH on a child TRX to the TCH on

a parent TRX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247Figure 58 Handover attempt due to a BSC controlled TRHO . . . . . . . . . . . . . . . . 248Figure 59 Handover attempt due to DADL/B . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248Figure 60 AMR packing or unpacking handover . . . . . . . . . . . . . . . . . . . . . . . . . . 249Figure 61 Circuit pool switch during inter-system handover, target-BSC . . . . . . . 250Figure 62 Circuit pool switch during external handover, target-BSC . . . . . . . . . . 251Figure 63 BSS Internal Handover with MSC Support - Local Handover. . . . . . . . 252Figure 64 BSS Internal Handover with MSC Support - Distant Handover . . . . . . 253Figure 65 Intra BSC HO; interface type change from AoIP to AoTDM; TC in MGW. .

254Figure 66 MO DTM call establishment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255Figure 67 MT DTM call establishment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256Figure 68 DTM call reallocation; too high CS connection interference . . . . . . . . . 257Figure 69 DTM call reallocation; inadequate PS connection quality . . . . . . . . . . . 258Figure 70 DTM call; internal inter-cell handover; CS connection power budget . . 259Figure 71 DTM call; internal inter-cell handover; lack of resources in the PS territory

260Figure 72 DTM call; external handover, source BSC . . . . . . . . . . . . . . . . . . . . . . 261Figure 73 DTM call; external handover, target BSC . . . . . . . . . . . . . . . . . . . . . . . 262Figure 74 DTM call release initiated by the MS . . . . . . . . . . . . . . . . . . . . . . . . . . 263Figure 75 DTM call release; packet data transfer end . . . . . . . . . . . . . . . . . . . . . 264Figure 76 DTM REQUEST rejected when IMSI data not available. . . . . . . . . . . . 265Figure 77 Unsuccessful MO DTM; activation of a CS TCH in the PS territory fails, tim-

er expires while waiting for CHANNEL ACTIVATION ACK . . . . . . . . . 266Figure 78 Unsuccessful MT DTM; activation of a CS TCH in the PS territory fails, tim-

er expires while waiting for CHANNEL ACTIVATION ACK . . . . . . . . . 267Figure 79 Unsuccessful MT DTM; DTM ASSIGNMENT FAILURE received . . . . 268Figure 80 Timer T3107 expires while waiting for ASSIGNMENT COMPLETE. . . 269Figure 81 DTM call reallocation failure; DTM ASSIGNMENT FAILURE received 270Figure 82 DTM CS connection drops after ASSIGNMENT COMPLETE; CONNEC-

TION FAILURE received. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271Figure 83 DTM CS connection drops after ASSIGNMENT COMPLETE; RELEASE

INDICATION not received. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272Figure 84 Unsuccessful DTM call reallocation; timer T3107 expires while waiting for

ASSIGNMENT COMPLETE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273Figure 85 DTM TBF assignment failure; UL RLC block not received . . . . . . . . . . 274Figure 86 DTM-capable MS paging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

DN9813636 13



List of tablesTable 1 Measurement description of Handover Measurement . . . . . . . . . . . . . 16Table 2 MSC incoming counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16Table 3 MSC outgoing counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Table 4 BSC incoming counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Table 5 BSC outgoing counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Table 6 BSC Intra-cell handover counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Table 7 Intra-segment handover counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Table 8 Handover cause counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Table 9 Non-relevant counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Table 10 Inter-System Handover counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Table 11 Common BCCH Control for GSM counters . . . . . . . . . . . . . . . . . . . . . 24Table 12 Multi BCF Control counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Table 13 Inter PLMN Handover counters, incoming handovers . . . . . . . . . . . . . 24Table 14 Inter PLMN Handover counters, outgoing handovers . . . . . . . . . . . . . . 24Table 15 GSM-WCDMA Interworking Enhancement counters . . . . . . . . . . . . . . 25Table 16 DTM counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Table 17 BSS Internal Handover Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Table 18 Spare counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

14 DN9813636



DN9813636 15

4 Handover Measurement Summary of changes


Summary of changesChanges between document issues are cumulative. Therefore, the latest document issue contains all changes made to previous issues.

Changes made between issues 13-1 and 13-0New counters 004259 and 004260 related to BSS21325: 8K TRAU for OSC AMR FR have been added

New counters 004261, 004262, 004263, 004264, 004265, 004266, 004267, 004268 and 004269 related to BSS21534: OSC Full Rate with SAIC MS have been added

The Updated field is modified for the counters 004041, 004080, and 004147 related to feature BSS21530 mcBSC.

Changes made between issues 13-0 and 12-2New counters 004235, 004236, 004237, 004238, 004239, 004240, 004241, 004242, 004243, 004251 and 004252 are introduced due to the feature BSS21309 : Orthogonal Sub Channel with SAIC MS.

New counters 004244, 004245, 004246, 004247, 004248, 004249 and 004250 are intro-duced due to the feature BSS21341: A over IP.

The counters 004229, 004230, 004231, 004232, 004233 and 004234 are added to the table BSC Intra-cell handover counters.

Spare counter 004171 has made official due to the feature BSS21483: Improved AMR packing and unpacking.

Spare counters 004172, 004173, 004189 and 004209 have made official due to the feature BSS21528: ISHO acceleration via Iur-g.

New spare counters 004253, 004254, 004255, 004256, 004257 and 004258 are intro-duced for future use.

New signalling charts added in section Signalling charts of Handover Measurement: Figures 63, 64 and 65.

Changes made between issues 12-2 and 12-1The Updated field of counter 004033 / CAUSE HO STARTED BY OMC is modified.

16 DN9813636


Id:0900d80580850017Confidential


1 4 Handover MeasurementThe handover measurement registers information about the number of handovers (HO) controlled by the mobile switching centre (MSC) or the base station controller (BSC). The recorded items of data comprise the number of the incoming, outgoing, or intra-cell HOs, and the number of successful and unsuccessful attempts, seizures, and HOs. The HOs are sorted according to direction, where appropriate. This measurement type collects one set of results for each BTS. Signalling charts are drawn with the accuracy of message interface.

Measurement description

Counters of Handover Measurement

MeasurementMeasurement ID Measurement abbreviation

Handover Measurement4HO

Product BSC

Product software release S1

Target name BTS + Coverage Area

Table 1 Measurement description of Handover Measurement

Counter Counter number

MSC I success HO 004000

MSC I unsuccessful HO due lack 004001

MSC I unsuccessful HO due conn 004002

MSC I unsuccessful HO due BSS problem 004003

MSC I TCH TCH 004043

MSC I SDCCH TCH 004044

MSC I SDCCH 004045

MSC I TCH TCH attempt 004046

MSC I SDCCH TCH attempt 004047

MSC I SDCCH attempt 004048

MSC I end of HO 004080

MSC I att switch circuit pool 004092

MSC I success switch circuit pool 004093

MSC I unsuccessful due A interface circuit 004101

MSC I call possible dropped during HO 004108

MSC I attempt for HSCSD 004114

MSC I success for HSCSD 004115

MSC I success increased for HSCSD 004116

Table 2 MSC incoming counters

DN9813636 17

4 Handover Measurement 4 Handover Measurement


MSC I success decreased for HSCSD 004117

MSC I IURG TCH HO ATTEMPT 004172

MSC I IURG TCH HO SUCCESS 004173

MSC I internal HO to external 004186


Table 2 MSC incoming counters (Cont.)


MSC O success HO 004004

MSC O generated HO required messages 004005

MSC O unsuccessful HO due return 004006

MSC O end of HO 004007

MSC O end of HO due BSS 004008

MSC O generated HO command messages 004009

MSC O HO not allowed 004037

MSC O call clear during HO 004041

MSC O TCH TCH 004049

MSC O SDCCH TCH 004050

MSC O SDCCH 004051

MSC O TCH TCH attempt 004052

MSC O SDCCH TCH attempt 004053

MSC O SDCCH attempt 004054

MSC O fail lack 004055

MSC O attempt switch circuit pool 004094

MSC O success switch circuit pool 004095

MSC O adjacent cell identification error 004100

MSC O unsuccessful due a if crc 004102

MSC O call dropped during HO 004107

MSC O attempt for HSCSD 004112

MSC O success for HSCSD 004113

MSC O internal HO to external 004187

Table 3 MSC outgoing counters


BSC I success HO 004010

BSC I unsuccessful HO due lack 004011

Table 4 BSC incoming counters

18 DN9813636




BSC I unsuccessful HO due conn 004012

BSC I unsuccessful HO due BSS problem 004013

BSC I TCH TCH 004056

BSC I SDCCH TCH 004057

BSC I SDCCH 004058

BSC I TCH TCH attempt 004059

BSC I SDCCH TCH attempt 004060

BSC I SDCCH attempt 004061

BSC I nonopt 004062

BSC I nonopt attempt 004063

BSC I end of HO 004081

BSC I dropped calls 004083

BSC I unsuccessful due A interface circuit type 004097

BSC I attempt for HSCSD 004120

BSC I success for HSCSD 004121

BSC I success increased for HSCSD 004122

BSC I success decreased for HSCSD 004123

BSC I internal HO to external 004184

BSC I internal HO to external successful 004202


Table 4 BSC incoming counters (Cont.)


BSC O success HO 004014

BSC O unsuccessful HO due return 004015

BSC O end of HO 004016

BSC O end of HO due BSS 004017

BSC O HO not allowed 004038

BSC O call clear during HO 004042

BSC O TCH TCH 004064

BSC O SDCCH TCH 004065

BSC O SDCCH 004066

BSC O TCH TCH attempt 004067

BSC O SDCCH TCH attempt 004068

BSC O SDCCH attempt 004069

BSC O nonopt 004070

BSC O nonopt attempt 004071

Table 5 BSC outgoing counters

DN9813636 19



BSC O fail lack 004072

BSC O dropped calls 004084

BSC O unsuccessful A interface circuit type 004096

BSC O attempt for HSCSD 004118

BSC O success for HSCSD 004119

BSC O internal HO to external 004185

BSC O internal HO to external successful 004203


Table 5 BSC outgoing counters (Cont.)


Intra-cell success HO 004018

Intra-cell unsuccessful HO due lack 004019

Intra-cell unsuccessful HO due move 004020

Intra-cell unsuccessful HO due BSS problem 004021

Intra-cell unsuccessful HO due return 004022

Intra-cell HO not allowed 004036

Intra-cell call cleared during HO 004039

Cell TCH TCH 004073

Cell SDCCH TCH 004074

Cell SDCCH 004075

Cell TCH TCH attempt 004076

Cell SDCCH TCH attempt 004077

Cell SDCCH attempt 004078

Cell dropped calls 004085

Intra-cell unsuccessful A interface circuit type 004098

Intra-cell attempt for HSCSD 004124

Intra-cell success for HSCSD 004125

Intra-cell success increased for HSCSD 004126

Intra-cell success decreased for HSCSD 004127

Internal intra cell HO to external 004188

Intra-cell TCH HO to external successful 004204

HO AMR FR to HR successful 004205

HO AMR HR to FR successful 004206

HO from LRTCH TO normal area successful 004216

HO from LRTCH to extended area successful 004218

Table 6 BSC Intra-cell handover counters

20 DN9813636




HO FROM EXTENDED TO SUPER EXTENDED AREA SUCCESSFUL

004230

HO FROM SUPER EXTENDED TO EXTENDED AREA SUCCESSFUL

004232

HO FROM LRTCH TO SUPER EXTENDED AREA SUCCESSFUL

004234

HO ATTEMPT FROM AMR HR TO DHR 004235

HO FROM AMR HR TO DHR SUCCESSFUL 004237

HO FROM AMR FR TO DHR SUCCESSFUL 004238

INT CELL UNSUCCESS HO TO DHR DUE TO CSDAP

004239

HO FROM DHR DUE TO RX QUALITY SUCCESS-FUL

004242

HO FROM DHR DUE TO UL RX LEVEL DIFFER-ENCE SUCCESSFUL

004243

HO FROM DHR DUE TO RX LEVEL SUCCESSFUL 004252

HO ATTEMPT FROM AMR FR TO DFR IN 8K TRAU MODE

004259

HO FROM AMR FR TO DFR IN 8K TRAU MODE SUCCESSFUL

004260

HO ATTEMPT FROM AMR FR TO DFR 004261

HO FROM AMR FR TO DFR SUCCESSFUL 004262

INT CELL UNSUCCESS HO TO DFR DUE TO CSDAP MISMATCH

004263

HO FROM DFR DUE TO RX QUALITY SUCCESSFUL 004267

HO FROM DFR DUE TO UL RX LEVEL DIFFERENCE SUCCESSFUL

004268


Table 6 BSC Intra-cell handover counters (Cont.)


Successful SDCCH-SDCCH HO between BTSs within a segment

004131

Successful TCH-TCH HO between BTSs within a segment

004132

Inter band successful SDCCH-SDCCH HO between BTSs within a segment

004134

Inter band successful TCH-TCH HO between BTSs within a segment

004136

Inter BTS-type successful SDCCH-SDCCH HO within a segment

004138

Table 7 Intra-segment handover counters

DN9813636 21



Inter BTS-type successful TCH-TCH HO within a segment

004140


Table 7 Intra-segment handover counters (Cont.)


Cause uplink quality 004023

Cause uplink level 004024

Cause downlink quality 004025

Cause downlink level 004026

Cause distance 004027

Cause response to MSC invocation 004028

Cause high interference on uplink 004029

Cause high interference on downlink 004030

Cause umbrella HO 004031

Cause power budget HO 004032

Cause HO started by OMC 004033

Cause HO started by traffic reason 004035

Cause directed retry 004079

Cause pre-emption 004086

Cause field drop 004087

Cause low distance 004088

Cause bad C/I ratio 004089

Cause good C/I ratio 004090

HO due slow moving MS 004091

HO attempt due switch circuit pool 004099

HO from normal to extended area 004103

HO from extended to normal area 004104

HO due to MS slow speed 004105

HO due to MS high speed 004106

HO attempt due to bad RX level on super 004109

HO attempt due to good RX level on regular 004110

HO attempt due ERFD 004111

HO attempt due to direct access 004128

HO attempt due DADLB 004129

HO attempt due to GPRS 004130

Table 8 Handover cause counters

22 DN9813636




Inter band attempted SDCCH-SDCCH HO between BTSs within a segment

004133

Inter band attempted TCH-TCH HO between BTSs within a segment

004135

Inter BTS-type attempted SDCCH-SDCCH HO within a segment

004137

Inter BTS-type attempted TCH-TCH HO within a segment

004139

Intra cell HO attempts due to HSCSD traffic 004141

HO attempts due to channel rate change from AMR FR to AMR HR

004142

HO attempts due to channel rate change from AMR HR to AMR FR

004143

Inter segment success TCH HO between bands 004168

HO cause due to pool switching 004170

AMR UNPACKING HO ATTEMPT DUE TO RX LEVEL 004171

HO attempts due to ISHO 004180

HO attempts due to inter-system direct access 004181

HO attempt from LRTCH to normal area 004215

HO attempt from LRTCH to extended area 004217

HO attempt due to IBHO to GSM 004219

HO attempt due to IBHO to UTRAN 004220

HO attempt due to INT HO to EXT 004221

HO attempt due to DTM MO CS to PS 004222

HO attempt due to DTM MT CS to PS 004223

HO attempt due to DTM MT PS to PS 004224

HO attempt due to DTM PS to CS 004225

HO attempt due to DTM DISABLED 004226

HO attempt due to PCU QUAL CONTROL 004227

HO attempt due to DTM NO PS RES AVAIL 004228

HO ATTEMPT FROM EXTENDED TO SUPER EXTENDED AREA

004229

HO ATTEMPT FROM SUPER EXTENDED TO EXTENDED AREA

004231

HO ATTEMPT FROM LRTCH TO SUPER EXTENDED AREA

004233

HO ATTEMPT FROM AMR FR TO DHR 004236

HO ATTEMPT FROM DHR DUE TO RX QUALITY 004240

HO ATTEMPT FROM DHR DUE TO UL RX LEVEL DIFFERENCE

004241


Table 8 Handover cause counters (Cont.)

DN9813636 23



HO ATTEMPT FROM DHR DUE TO RX LEVEL 004251

HO ATTEMPT FROM DFR DUE TO RX QUALITY 004264

HO ATTEMPT FROM DFR DUE TO UL RX LEVEL DIFFERENCE

004265

HO ATTEMPT FROM DFR DUE TO RX LEVEL 004266

HO FROM DFR DUE TO RX LEVEL SUCCESSFUL 004269


Table 8 Handover cause counters (Cont.)


Cause HO started by channel administration 004034

MSC I call clear during HO 004040

BSC O MS required enquiry proc 004082

Table 9 Non-relevant counters


MSC I TCH HO from WCDMA RAN attempt 004144

MSC I WCDMA RAN TCH HO attempt unsucc due lack

004145

MSC I WCDMA RAN HO attempt unsucc due BSS problem

004146

MSC I WCDMA RAN end of HO 004147

MSC I unsuccess HO WCDMA RAN due conn 004148

MSC I HO WCDMA RAN TCH success 004149

MSC O TCH HO to WCDMA RAN attempt 004150

MSC O HO to WCDMA RAN not allowed 004151

MSC O end of HO to WCDMA RAN due BSS 004152

MSC O gen inter system to WCDMA RAN handover req messages

004153

MSC O gen inter system to WCDMA RAN handover com messages

004154

MSC O to WCDMA RAN fail lack 004155

MSC O end of HO to WCDMA RAN 004156

MSC O call drop during HO to WCDMA RAN 004157

MSC O to WCDMA RAN success TCH HO 004158

MSC I UNSUCCESSFUL IURG HO DUE HO REQUEST DELAY

004189

Table 10 Inter-System Handover counters

24 DN9813636




MSC I unsuccessful HO from WCDMA RAN due pool switching

004207

MSC I successful HO from WCDMA RAN pool switch-ing

004208

IURG HO REQUEST AFTER MS ON TARGET CHANNEL

004209


Table 10 Inter-System Handover counters (Cont.)


Successful HO inter band TCH 004159

Unsuccessful HO inter band TCH 004161

HO attempt inter band due level 004163

Unsucc HO inter band due level 004164

Succ HO inter band due level 004165

Inter segment success SDCCH HO between bands 004166

Table 11 Common BCCH Control for GSM counters


Successful HO inter BTS type TCH 004160

Unsuccessful HO inter BTS type TCH 004162

Inter segment success SDCCH HO between BTS types

004167

Inter segment success TCH HO between BTS types 004169

Table 12 Multi BCF Control counters


Incoming MSC HO attempts from inter-PLMN intra- GSM

004174

Incoming successful MSC HO from inter-PLMN intra- GSM

004175

Incoming failed MSC HO from inter-PLMN intra-GSM 004176

Table 13 Inter PLMN Handover counters, incoming handovers


Outgoing MSC HO attempts from inter-PLMN intra-GSM

004177

Table 14 Inter PLMN Handover counters, outgoing handovers

DN9813636 25



Outgoing successful MSC HO from inter-PLMN intra-GSM

004178

Outgoing failed MSC HO from inter-PLMN intra-GSM 004179


Table 14 Inter PLMN Handover counters, outgoing handovers (Cont.)


Outgoing SDCCH-TCH handover attempts to WCDMA RAN controlled by MSC

004182

Successful outgoing SDCCH-TCH handovers to WCDMA RAN controlled by MSC

004183

Table 15 GSM-WCDMA Interworking Enhancement counters


DTM MS HO ATTEMPTS TO DTM CELL 004190

DTM MS HO SUCCEEDED TO DTM CELL 004191

DTM MS HO ATTEMPTS TO NON DTM CELL 004192

DTM MS HO SUCCEEDED TO NON DTM CELL 004193

DTM CALL HO FROM DTM CELL SUCCEEDED 004194

DTM HO DUE LACK OF RESOURCES 004195

NON DTM BASED ISHO ATTEMPT 004196

NON DTM BASED ISHO SUCCESS 004197

DTM CALL HO ATTEMPTS TO DTM CELL 004198

DTM CALL HO SUCCESS TO DTM CELL 004199

DTM CALL HO ATTEMPTS TO NON DTM CELL 004200

DTM CALL HO SUCCESS TO NON DTM CELL 004201

Table 16 DTM counters

Counter Counter Number

BSS INTERNAL HANDOVER REQUIRED REQUESTS

004244

BSS INTERNAL HANDOVER COMMANDS 004245

BSS INTERNAL HANDOVER FAILURES 004246

BSS INTERNAL HANDOVER REQUIRED REJECTIONS

004247

BSS INTERNAL HANDOVER SUCCESSFUL 004248

Table 17 BSS Internal Handover Counters

26 DN9813636




Related topics

• Counters of Handover Measurement • Signalling charts of Handover Measurement • Signalling charts of Dual Transfer Mode

Instructions

• BSC Statistics Administration

For information on using this measurement to test the activation of related software, see the testing instructions in:

• Activating and Testing BSS21274: Long Reach TSL (Flexi EDGE BTS)

Reference

• BSC Measurement Counters Displaying Program (FOXMEA) • Performance Measurements

Descriptions

• Advanced Multilayer Handling • Common BCCH Control in BSC • Direct Access to Desired Layer/Band • Dual Transfer Mode in BSC • Enhanced Speech Codecs: AMR and EFR • Extended Cell Range • GPRS/EDGE System Feature Description • GPRS in BSC • GSM-WCDMA Interworking • Handover Support for Coverage Enhancements • HSCSD and 14.4 kbit/s Data Services in BSC • Intelligent Underlay-Overlay

BSS INTERNAL HANDOVER ENQUIRY 004249

BSS INTERNAL HANDOVER ENQUIRY REJECTIONS

004250


Table 17 BSS Internal Handover Counters (Cont.)


Spare 004253

Spare 004254

Spare 004255

Spare 004256

Spare 004257

Spare 004258

Table 18 Spare counters

DN9813636 27



• Multi BCF Control in BSC • Support of Cell Global Identity • OSC Full Rate with SAIC MS • 8K TRAU FOR OSC AMR FR

28 DN9813636


Id:0900d8058085005bConfidential


2 Counters of Handover Measurement

2.1 004000 / MSC I SUCCESS HO

2.2 004001 / MSC I UNSUCCESS HO DUE LACK

Counter ID: 004000 Network element name: MSC I SUCCESS HO

Version: 4.0 NetAct name: MSC_I_SUCC_HO

Description: Number of successful incoming HOs controlled by the MSC.

Dependencies: When one of the counters 004043, 004044 or 004045 is updated. This counter represents their sum.

Updated: When the HO (SDCCH to SDCCH, SDCCH to TCH or TCH to TCH) is com-pleted.

See figures:- Successful external TCH to TCH handover, target BSC- Successful external SDCCH to SDCCH handover, target BSC- External directed retry, target BSC- Successful external TCH TCH HSCSD handover from four to one channel, target BSC- Successful external TCH TCH HSCSD handover from one to two channels, target BSC

Logical type: Sum Trigger type: Event Sampling interval:

Unit: Integer number Range: Example values:

Dependencies with other counters:

004043: MSC I TCH TCH

004044: MSC I SDCCH TCH

004045: MSC I SDCCH

Operability class:

Related to feature: Related to standard:

3GPP Measurement name (Clause header):

3GPP Measurement type:

Exceptions to related standard:

Used from release: S1 Definition updated in release:

Counter ID: 004001 Network element name: MSC I UNSUCCESS HO DUE LACK

Version: 4.0 NetAct name: MSC_I_FAIL_LACK

DN9813636 29

4 Handover Measurement Counters of Handover Measurement


2.3 004002 / MSC I UNSUCCESS HO DUE CONN

Description: Number of incoming HOs, controlled by the MSC, that are unsuccessful due to a lack of radio resources.

Impact: HO failure

Reason for the impact: Internal

Updated: a) When no SDCCH is available for an SDCCH HO.b) When no TCH is available for a TCH HO.c) When no TCH is available for an SDCCH to TCH HO.

See figure Unsuccessful external TCH to TCH handover due to a lack of resources, target BSC




Operability class:






Counter ID: 004002 Network element name: MSC I UNSUCCESS HO DUE CONN

Version: 4.0 NetAct name: MSC_I_FAIL_CONN

Description: Number of incoming HOs, controlled by the MSC, that are unsuccessful due to a connection failure.

Impact: HO failure

Reason for the impact: External/Abis interface

Updated: When the connection between the MS and the BTS is broken (on the target channel), that is, when a message carrying an indication of a connection failure is received (radio link failure or transcoder failure).

See figure Unsuccessful external TCH to TCH handover due to a radio link failure during handover, target BSC




30 DN9813636




2.4 004003 / MSC I UNSUCCESS HO DUE BSS PROBLEM

2.5 004004 / MSC O SUCCESS HO

Operability class:






Counter ID: 004003 Network element name: MSC I UNSUCCESS HO DUE BSS PROBLEM

Version: 4.0 NetAct name: MSC_I_FAIL_BSS

Description: Number of incoming HOs, controlled by the MSC, that are unsuccessful because of BSS problems.

Impact: HO failure


Updated: When the radio channel activation fails.

See figure Unsuccessful external TCH to TCH handover due to a failure in the activa-tion of a new channel




Operability class:






Counter ID: 004004 Network element name: MSC O SUCCESS HO

Version: 4.0 NetAct name: MSC_O_SUCC_HO

Description: Number of successful outgoing HOs controlled by the MSC.

This counter is updated when one of the counters 004049, 004050 or 004051 is updated. This counter represents their sum.

DN9813636 31



2.6 004005 / MSC O GEN HO REQUIRED MESSAGES


See figures:- Successful external TCH to TCH handover, source BSC- Successful external SDCCH to SDCCH handover, source BSC- External directed retry, source BSC- Successful handover type reselection from an internal intra-cell TCH to TCH handover to an external handover due to switching circuit pool- Successful handover type reselection from an internal inter-cell TCH to TCH handover to an external handover due to switching the circuit pool- Successful external TCH TCH HSCSD handover from two to two channels, source BSC




004049: MSC O TCH TCH

004050: MSC O SDCCH TCH

004051: MSC O SDCCH

Operability class:






Counter ID: 004005 Network element name: MSC O GEN HO REQUIRED MESSAGES

Version: 4.0 NetAct name: MSC_O_HO_RQ_MSG

Description: Total number of the HO_REQUIRED messages that are generated by outgoing HOs controlled by the MSC.

32 DN9813636




2.7 004006 / MSC O UNSUCCESS HO DUE RETURN

Updated: When the BSC sends the HANDOVER_REQUIRED message to the MSC.

See figures:- Successful external TCH to TCH handover, source BSC- Successful external SDCCH to SDCCH handover, source BSC- External directed retry, source BSC- Unsuccessful external TCH to TCH handover due to a lack of resources, source BSC- Unsuccessful external TCH to TCH handover due to MS returning to the old channel, source BSC- Unsuccessful external TCH to TCH handover due to call clearing during handover, source BSC- Successful handover type reselection from an internal intra-cell TCH to TCH handover to an external handover due to switching the circuit pool- Successful handover type reselection from an internal inter-cell TCH to TCH handover to an external handover due to switching the circuit pool- Unsuccessful external TCH to TCH handover because the MSC rejects the handover due to various causes, source BSC- Unsuccessful external TCH to TCH handover due to GSM timer T8 expiry, source BSC- Unsuccessful external TCH to TCH handover due to adjacent cell error, source BSC- Unsuccessful external TCH or TCH handover, source BSC- Successful external TCH TCH HSCSD handover from two to two channels, source BSC




Operability class:






Counter ID: 004006 Network element name: MSC O UNSUCCESS HO DUE RETURN

Version: 4.0 NetAct name: MSC_O_FAIL_RET

Description: Number of outgoing HOs, controlled by the MSC, that are unsuccessful because the MS returns to the source channel.

Impact: HO failure.

Reason for the impact: External/Abis interface.

DN9813636 33



2.8 004007 / MSC O END OF HO

Updated: When the MS returns to the source channel.

See figure Unsuccessful external TCH to TCH handover due to MS returning to the old channel, source BSC




Operability class:






Counter ID: 004007 Network element name: MSC O END OF HO

Version: 4.0 NetAct name: MSC_O_END_OF_HO

Description: Number of the end of handover procedures (outgoing HO controlled by the MSC).

Impact:- HO failure (b and d)- Possibly call cleared (a and c)

Reason for the impact: External/A interface

Updated: a) When the GSM timer T8 expires (the CLEAR_COMMAND message not received).b) When the HO is rejected with another cause than switch_crc_pool, cip_type_mismatch, invalid_cell, no_radio_res_avail, req_terr_res_unava or T7_expiry.c) When the MSC sends a CLEAR_COMMAND message with a reason other than handover successful or call control to the BSC.d) When there is an internal conflict with the A interface.

See figures:- Unsuccessful external TCH to TCH handover because the MSC rejects the handover due to various causes, source BSC- Unsuccessful external TCH to TCH handover due to GSM timer T8 expiry, source BSC




34 DN9813636




2.9 004008 / MSC O END OF HO DUE BSS

2.10 004009 / MSC O GEN HO COM MESSAGES

Operability class:






Counter ID: 004008 Network element name: MSC O END OF HO DUE BSS

Version: 4.0 NetAct name: MSC_O_END_HO_BSS

Description: Number of the end of handover procedures due to BSS problems (out-going HO controlled by the MSC).

Impact: The call may possibly be cleared.

Reason for the impact: External/Abis interface.

Updated: When the connection between the MS and the BTS is broken (on the source channel), that is, when a message carrying an indication of a connection failure is received (radio link failure or transcoder failure).

See figure Unsuccessful external TCH to TCH handover due to a radio link failure during handover, source BSC




Operability class:






Counter ID: 004009 Network element name: MSC O GEN HO COM MESSAGES

Version: 4.0 NetAct name: MSC_O_HO_COMM

Description: Number of the HANDOVER_COMMAND messages that are generated by outgoing HOs controlled by the MSC.

DN9813636 35



2.11 004010 / BSC I SUCCESS HO

Updated: When HANDOVER_COMMAND is sent to the MS.

See figures:- Successful external TCH to TCH handover, source BSC- Successful external SDCCH to SDCCH handover, source BSC- External directed retry, source BSC- Unsuccessful external TCH to TCH handover due to MS returning to the old channel, source BSC- Unsuccessful external TCH to TCH handover due to call clearing during handover, source BSC- Successful handover type reselection from an internal intra-cell TCH to TCH handover to an external handover due to switching the circuit pool- Successful handover type reselection from an internal inter-cell TCH to TCH handover to an external handover due to switching the circuit pool- Unsuccessful external TCH to TCH handover due to GSM timer T8 expiry, source BSC- Successful external TCH TCH HSCSD handover from two to two channels, source BSC




Operability class:






Counter ID: 004010 Network element name: BSC I SUCCESS HO

Version: 4.0 NetAct name: BSC_I_SUCC_HO

Description: Number of successful incoming HOs controlled by the BSC.

Depedencies: When one of the counters 004056, 004057 or 004058 is updated. This counter represents their sum.

36 DN9813636




2.12 004011 / BSC I UNSUCCESS HO DUE LACK


See figures:- Successful internal inter-cell TCH to TCH handover- Successful internal inter-cell SDCCH to SDCCH handover- Internal inter-cell directed retry, including software BSS6114 TCH assignment to the super-reuse TRX in IUO- Successful internal inter-cell TCH TCH HSCSD handover from three to one channel- Successful internal inter-cell TCH TCH HSCSD handover from two to three channels- Internal inter-cell direct access from the TCH on a child TRX to the TCH on a parent TRX




004056: BSC I TCH TCH

004057: BSC I SDCCH TCH

004058: BSC I SDCCH

Operability class:






Counter ID: 004011 Network element name: BSC I UNSUCCESS HO DUE LACK

Version: 4.0 NetAct name: BSC_I_FAIL_LACK

Description: Number of incoming HOs, controlled by the BSC, that are unsuccessful due to a lack of resources.

Counter 004072 is updated along with this counter.

Impact: HO failure


DN9813636 37



2.13 004012 / BSC I UNSUCCESS HO DUE CONN


See figure Unsuccessful internal inter-cell TCH to TCH handover due to a lack of resources




004072: BSC O FAIL LACK

Operability class:






Counter ID: 004012 Network element name: BSC I UNSUCCESS HO DUE CONN

Version: 4.0 NetAct name: BSC_I_FAIL_CONN

Description: Number of incoming HOs, controlled by the BSC, that are unsuccessful due to a connection failure (the MS fails to move to the target channel).

Impact:- HO failure- The call may possibly be cleared


Dependencies:a) Counter 004015 is updated along with this counter.b) Counters 004016, 004083 and 004084 are updated along with this counter.c) Counter 004016 or 004042 is updated along with this counter.

38 DN9813636




2.14 004013 / BSC I UNSUCCESS HO DUE BSS PROBLEM

Updated: a) When the MS returns to the source channelb) When the MS is lost (GSM timer T3103 expires).c) When the connection between the MS and the BTS is broken (on the target chan-nel), that is, when a message carrying an indication of a connection failure is received (radio link failure or transcoder failure).

See figures:- Unsuccessful internal inter-cell TCH to TCH handover due to losing the MS during handover. The GSM timer T3103 expires- Unsuccessful internal inter-cell TCH to TCH handover due to MS returning to the old channel




004015: BSC O UNSUCCESS HO DUE RETURN

004016: BSC O END OF HO

004042: BSC O CALL CLEAR DURING HO

004083: BSC I DROP CALLS

004084: BSC O DROP CALLS

Operability class:






Counter ID: 004013 Network element name: BSC I UNSUCCESS HO DUE BSS PROBLEM

Version: 4.0 NetAct name: BSC_I_FAIL_BSS

Description: Number of incoming HOs, controlled by the BSC, that are unsuccessful due to BSS problems.

Impact:a) HO failureb) Call cleared

Reason for the impact: External/Abis interface or Internal/A -interface

Dependencies:a) Counter 004016 is updated along with this counter.b) Counters 004017, 004083 and 004084 are updated along with this counter.

DN9813636 39



2.15 004014 / BSC O SUCCESS HO

Updated: a) When the radio channel activation fails.b) When switching from a unidirectional to a bi-directional speech path fails.

See figures:- Unsuccessful internal inter-cell TCH to TCH handover due to a failure in the activa-tion of a new channel- Unsuccessful internal inter-cell TCH to TCH handover caused by internal timer expiry or a failure in the connection of a bi-directional speech path





004017: BSC O END OF HO DUE BSS



Operability class:






Counter ID: 004014 Network element name: BSC O SUCCESS HO

Version: 4.0 NetAct name: BSC_O_SUCC_HO

Description: Number of successful outgoing HOs controlled by the BSC.



See figures:- Successful internal inter-cell TCH to TCH handover- Successful internal inter-cell SDCCH to SDCCH handover- Internal inter-cell directed retry, including software BSS6114 TCH assignment to the super-reuse TRX in IUO- Successful internal inter-cell TCH TCH HSCSD handover from three to one channel- Successful internal inter-cell TCH TCH HSCSD handover from two to three channels- Internal inter-cell direct access from the TCH on a child TRX to the TCH on a parent TRX


40 DN9813636




2.16 004015 / BSC O UNSUCCESS HO DUE RETURN



004064: BSC O TCH TCH

004065: BSC O SDCCH TCH

004066: BSC O SDCCH

Operability class:






Counter ID: 004015 Network element name: BSC O UNSUCCESS HO DUE RETURN

Version: 4.0 NetAct name: BSC_O_FAIL_RET

Description: Number of outgoing HOs, controlled by the BSC, that are unsuccessful because the MS returns to the source channel.


Impact: HO failure



See figure Unsuccessful internal inter-cell TCH to TCH handover due to MS returning to the old channel




004012: BSC I UNSUCCESS HO DUE CONN

Operability class:






DN9813636 41



2.17 004016 / BSC O END OF HO

Counter ID: 004016 Network element name: BSC O END OF HO

Version: 4.0 NetAct name: BSC_O_END_OF_HO

Description: Number of the end of handover procedures that are related to outgoing HOs controlled by the BSC.

Dependencies:a) Counters 004012, 004083 and 004084 are updated along with this counter.b) Counter 004013 is updated along with this counter.c) Counter 004012 is updated along with this counter.

Impact:a) Call clearedb) and c) HO failure


Updated: a) When the MS is lost (GSM timer T3103 expires).b) When radio channel activation fails.c) When the connection between the MS and the BTS is broken (on the target chan-nel), that is, when a message carrying an indication of a connection failure is received (radio link failure or transcoder failure).

See figures:- Unsuccessful internal inter-cell TCH to TCH handover due to a failure in the activa-tion of a new channel- Unsuccessful internal inter-cell TCH to TCH handover due to losing the MS during handover. The GSM timer T3103 expires





004013: BSC I UNSUCCESS HO DUE BSS PROBLEM



Operability class:






42 DN9813636




2.18 004017 / BSC O END OF HO DUE BSS

2.19 004018 / INT CELL SUCCESS HO

Counter ID: 004017 Network element name: BSC O END OF HO DUE BSS

Version: 4.0 NetAct name: BSC_O_END_HO_BSS

Description: Number of outgoing HOs, controlled by the BSC, that are unsuccessful due to BSS problems.

Dependencies:a) Counter 004081 is updated along with this counter.b) Counters 004013, 004083 and 004084 are updated along with this counter.

Impact: Call cleared.


Updated: a) When the connection between the MS and the BTS is broken (on the source channel), that is, when a message carrying an indication of a connection failure is received (radio link failure or transcoder failure) before the HO_COMMAND message.b) When switching from a unidirectional to a bi-directional speech path fails.

See figures:- Unsuccessful internal inter-cell TCH to TCH handover due to a radio link failure during handover- Unsuccessful internal inter-cell TCH to TCH handover caused by internal timer expiry or a failure in the connection of a bi-directional speech path





004081: BSC I END OF HO



Operability class:






Counter ID: 004018 Network element name: INT CELL SUCCESS HO

DN9813636 43



2.20 004019 / INT CELL UNSUCCESS HO DUE LACK

Version: 4.0 NetAct name: CELL_SUCC_HO

Description: Number of successful intra-cell HOs.


Updated: When the HO (SDCCH to SDCCH, TCH to TCH or SDCCH to TCH) is com-pleted.

See figures:- Successful internal intra-cell TCH to TCH handover- Successful internal intra-cell SDCCH to SDCCH handover- Internal intra-cell directed retry including software BSS6114: TCH assignment to the super-reuse TRX in IUO- Successful internal intra-cell TCH TCH HSCSD handover from two to one channel- Successful internal intra-cell TCH TCH HSCSD handover from one to three channels- Internal intra-cell direct access from regular DCCH to a super-reuse TRX




004073: CELL TCH TCH

004074: CELL SDCCH TCH

004075: CELL SDCCH

Operability class:






Counter ID: 004019 Network element name: INT CELL UNSUCCESS HO DUE LACK

Version: 4.0 NetAct name: CELL_FAIL_LACK

Description: Number of intra-cell HOs that are unsuccessful due to a lack of resources.

Impact: HO failure


44 DN9813636




2.21 004020 / INT CELL UNSUCCESS HO DUE MOVE


See figure Unsuccessful internal intra-cell TCH to TCH handover due to lack of resources




Operability class:






Counter ID: 004020 Network element name: INT CELL UNSUCCESS HO DUE MOVE

Version: 4.0 NetAct name: CELL_FAIL_MOVE

Description: Number of intra-cell HOs that are unsuccessful because the MS cannot either move to the target channel or return to the source channel.


Impact: Call cleared


Updated: When the MS is lost (GSM timer T3107 expires).

See figure Unsuccessful internal intra-cell TCH to TCH handover due to losing the MS during handover. The GSM timer T3107 expires




004085: CELL DROP CALLS

Operability class:




DN9813636 45



2.22 004021 / INT CELL UNSUCCESS HO DUE BSS PROBLEM



Counter ID: 004021 Network element name: INT CELL UNSUCCESS HO DUE BSS PROBLEM

Version: 4.0 NetAct name: CELL_FAIL_BSS

Description: Number of unsuccessful intra-cell HOs due to BSS problems.

Dependency:d) Counter 004085 is updated along with this counter.

Impact:a) and b) HO failurec) Possibly call clearedd) Call cleared

Reason for the impact: External/Abis interface or Internal/A -interface

Updated: a) When a radio channel activation fails.b) When the physical context request fails.c) When the connection between the MS and the BTS is broken, that is, when a message carrying an indication of a connection failure is received (radio link failure or transcoder failure).d) When switching from a unidirectional to a bi-directional speech path fails.

See figure Unsuccessful internal intra-cell TCH to TCH handover due to a failure in the activation of a new channel




004085: CELL DROP CALLS

Operability class:






46 DN9813636




2.23 004022 / INT CELL UNSUCCESS HO DUE RETURN

2.24 004023 / CAUSE UPLINK QUALITY

Counter ID: 004022 Network element name: INT CELL UNSUCCESS HO DUE RETURN

Version: 4.0 NetAct name: CELL_FAIL_RET

Description: Number of unsuccessful intra-cell HOs due to the MS's return to the source channel.

Impact: HO failure



See figures:- Unsuccessful internal intra-cell TCH to TCH handover due to MS returning to the old channel- Unsuccessful internal intra-cell TCH to TCH handover, caused by an internal timer expiry in the BSC or a CONNECTION_FAILURE, ERROR_INDICATION, or ERROR_REPORT message coming to the target channel




Operability class:






Counter ID: 004023 Network element name: CAUSE UPLINK QUALITY

Version: 4.0 NetAct name: CAUSE_UP_QUAL

Description: Number of HO attempts caused by uplink quality (outgoing).

Updated: When a HO is started due to uplink quality.

See figures:- Successful internal inter-cell TCH to TCH handover- Successful external TCH to TCH handover, source BSC- Successful internal inter-cell SDCCH to SDCCH handover- Successful external SDCCH to SDCCH handover, source BSC


DN9813636 47



2.25 004024 / CAUSE UPLINK LEVEL

2.26 004025 / CAUSE DOWNLINK QUALITY



Operability class:






Counter ID: 004024 Network element name: CAUSE UPLINK LEVEL

Version: 4.0 NetAct name: CAUSE_UP_LEVEL

Description: Number of HO attempts caused by uplink level (outgoing).

Updated: When a HO is started due to uplink level.





Operability class:






Counter ID: 004025 Network element name: CAUSE DOWNLINK QUALITY

Version: 4.0 NetAct name: CAUSE_DOWN_QUAL

Description: Number of HO attempts caused by downlink quality (outgoing).

48 DN9813636




2.27 004026 / CAUSE DOWNLINK LEVEL

Updated: When a HO is started due to downlink quality.

See figures:- Successful internal intra-cell TCH to TCH handover- Successful internal inter-cell TCH to TCH handover- Successful external TCH to TCH handover, source BSC- Successful internal intra-cell SDCCH to SDCCH handover- Successful internal inter-cell SDCCH to SDCCH handover- Successful external SDCCH to SDCCH handover, source BSC




Operability class:






Counter ID: 004026 Network element name: CAUSE DOWNLINK LEVEL

Version: 4.0 NetAct name: CAUSE_DOWN_LEV

Description: Number of HO attempts caused by downlink level (outgoing).

Updated: When a HO is started due to downlink level.





Operability class:






DN9813636 49



2.28 004027 / CAUSE DISTANCE

2.29 004028 / CAUSE RESPONSE TO MSC INVOCATION

Counter ID: 004027 Network element name: CAUSE DISTANCE

Version: 4.0 NetAct name: CAUSE_DISTANCE

Description: Number of HO attempts caused by distance (outgoing).

Updated: When a HO is started due to distance.





Operability class:






Counter ID: 004028 Network element name: CAUSE RESPONSE TO MSC INVOCATION

Version: 4.0 NetAct name: CAUSE_MSC_INVOC

Description: Number of HO attempts due to a response to an invocation from the MSC (outgoing).

Updated: When a HO is started due to a response to an MSC invocation.





50 DN9813636




2.30 004029 / CAUSE HIGH INT ON UPLINK

2.31 004030 / CAUSE HIGH INT ON DOWNLINK

Operability class:






Counter ID: 004029 Network element name: CAUSE HIGH INT ON UPLINK

Version: 4.0 NetAct name: CAUSE_INTFER_UP

Description: Number of HO attempts caused by high interference on uplink (outgo-ing).

Updated: When a HO is started due to high interference on uplink.





Operability class:






Counter ID: 004030 Network element name: CAUSE HIGH INT ON DOWNLINK

Version: 4.0 NetAct name: CAUSE_INTFER_DWN

Description: Number of HO attempts caused by high interference on downlink (outgo-ing).

DN9813636 51



2.32 004031 / CAUSE UMBRELLA HO

Updated: When a HO is started due to high interference on downlink.





Operability class:






Counter ID: 004031 Network element name: CAUSE UMBRELLA HO

Version: 4.0 NetAct name: CAUSE_UMBR

Description: Number of attempts to umbrella HO (outgoing).

Updated: When a HO is started due to an umbrella HO.

See figures:- Successful internal inter-cell TCH to TCH handover- Successful external TCH to TCH handover, source BSC- Successful internal inter-cell SDCCH to SDCCH handover- Successful external SDCCH to SDCCH handover, source BSC- Internal inter-cell direct access from the TCH on a child TRX to the TCH on a parent TRX




Operability class:





52 DN9813636




2.33 004032 / CAUSE POWER BUDGET HO

2.34 004033 / CAUSE HO STARTED BY OMC


Counter ID: 004032 Network element name: CAUSE POWER BUDGET HO

Version: 4.0 NetAct name: CAUSE_PBDGT

Description: Number of attempts to power budget HO (outgoing).

Updated: When a HO is started due to a power budget HO.





Operability class:






Counter ID: 004033 Network element name: CAUSE HO STARTED BY OMC

Version: 4.1 NetAct name: CAUSE_OMC

Description: Number of HO attempts started by the OMC (outgoing).

Updated: When a HO is started by OMC or if the BSS21389 Security Improvement by Immediate SDCCH Handover is employed and Immediate SDCCH Handover is started.


DN9813636 53



2.35 004034 / CAUSE HO STARTED BY CHANNEL ADM

2.36 004035 / CAUSE HO STARTED BY TRAFFIC REASON




Operability class:






Counter ID: 004034 Network element name: CAUSE HO STARTED BY CHANNEL ADM

Version: 4.0 NetAct name: CAUSE_CH_ADM

Description: This counter is not in use.

Updated: This counter is not updated.

Logical type: Trigger type: Sampling interval:

Unit: Range: Example values:


Operability class:






Counter ID: 004035 Network element name: CAUSE HO STARTED BY TRAFFIC REASON

Version: 4.0 NetAct name: HO_ATT_DUE_TO_BSC_CONTR_TRHO

Description: Number of HO attempts due to TRHO, controlled by the BSC.

Updated: When a HO is started due to BSC TRHO.

See figure Handover attempt due to a BSC controlled TRHO


54 DN9813636




2.37 004036 / INT CELL HO NOT ALLOWED



Operability class:

Related to feature:

BSS8123: Advanced Multilayer Handling

Related to standard:





Counter ID: 004036 Network element name: INT CELL HO NOT ALLOWED

Version: 4.0 NetAct name: CELL_NOT_ALLWD

Description: Number of HOs that are unsuccessful because no HOs are allowed (intra-cell HO).

Impact: HO failure


Updated: a) When HO execution is not allowed in the current phase of the call in prog-ress.b) When a HO is interrupted because an assignment procedure has been started during a HO but before the BSC has sent an ASSIGNMENT_COMMAND or HANDOVER_COMMAND message to the MS.

See figure Unsuccessful internal intra-cell TCH to TCH handover because a handover is not allowed at this phase of the call




Operability class:






DN9813636 55



2.38 004037 / MSC O HO NOT ALLOWED

2.39 004038 / BSC O HO NOT ALLOWED

Counter ID: 004037 Network element name: MSC O HO NOT ALLOWED

Version: 4.0 NetAct name: MSC_O_NOT_ALLWD

Description: Number of outgoing HOs, controlled by the MSC, that are unsuccessful because no HOs are allowed.

Impact: HO failure


Updated: a) When HO execution is not allowed in the current phase of the call in prog-ress.b) When the DISABLE_INT_HO parameter is set and an underlay overlay HO start is attempted.c) When DISABLE_EXT_DR is set and DR is attempted.d) When external HO is not possible due to FACCH call setup.e) When an external HO is not possible because the neighbouring cell is defined to be the normal area of an extended cell from another BSC.

See figures:- Unsuccessful external TCH to TCH handover because a handover is not allowed, source BSC- Unsuccessful external TCH to TCH handover because the MSC rejects the handover due to various causes, source BSC




Operability class:






Counter ID: 004038 Network element name: BSC O HO NOT ALLOWED

Version: 4.0 NetAct name: BSC_O_NOT_ALLWD

56 DN9813636




2.40 004039 / INT CELL CALL CLEAR DURING HO

Description: Number of outgoing HOs, controlled by the BSC, that are unsuccessful because no HOs are allowed.


Impact: HO failure

Reason for the impact: External/A interface

Updated: - When HO execution is not allowed in the current phase of the call in prog-ress.- When an HO is interrupted because the assignment procedure bas been started during a HO but before the BSC has sent a HANDOVER_COMMAND message to the MS.

See figure Unsuccessful internal inter-cell TCH to TCH handover because a handover is not allowed at this phase of the call





Operability class:






Counter ID: 004039 Network element name: INT CELL CALL CLEAR DURING HO

Version: 4.0 NetAct name: CELL_CALL_CLR

Description: Number of intra-cell HOs that are unsuccessful because the call is cleared.

Reason for the impact: External

Updated: a) When the subscriber clears the call during the HO.b) When channel blocking is started during the HO.

See figure Unsuccessful internal intra-cell TCH to TCH handover due to call clearing during handover



DN9813636 57



2.41 004040 / MSC I CALL CLEAR DURING HO

2.42 004041 / MSC O CALL CLEAR DURING HO


Operability class:






Counter ID: 004040 Network element name: MSC I CALL CLEAR DURING HO

Version: 4.0 NetAct name: MSC_I_CALL_CLR






Operability class:






Counter ID: 004041 Network element name: MSC O CALL CLEAR DURING HO

Version: 4.1 NetAct name: MSC_O_CALL_CLR

Description: Number of outgoing HOs, controlled by the MSC, that are unsuccessful because the call is cleared during the HO.


Reason for the impact: Internal or external/A interface

58 DN9813636




2.43 004042 / BSC O CALL CLEAR DURING HO

Updated: a) When the subscriber clears the call during the HO.b) When channel blocking is started during the HO.c) When the MS has sent messages concerning - A interface speech circuits - state changes of the BSSAP subsystem - abnormal release of the SCCP connectiond) When the reset of circuits are received from the MSCe) When there is a BCSU/BCXU restart (if the TCHs related to the HO are in that BCSU/BCXU)

See figure Unsuccessful external TCH to TCH handover due to call clearing during handover, source BSC.




Operability class:






Counter ID: 004042 Network element name: BSC O CALL CLEAR DURING HO

Version: 4.0 NetAct name: BSC_O_CALL_CLR

Description: Number of outgoing HOs, controlled by the BSC, that are unsuccessful because the call is cleared.



Reason for the impact: Internal or external / A interface

Updated: a) When the subscriber clears the call during the HO.b) When channel blocking is started during the HO.

See figure Unsuccessful internal inter-cell TCH to TCH handover due to call clearing during handover





DN9813636 59



2.44 004043 / MSC I TCH TCH

2.45 004044 / MSC I SDCCH TCH

Operability class:






Counter ID: 004043 Network element name: MSC I TCH TCH

Version: 4.0 NetAct name: MSC_I_TCH_TCH

Description: Number of successful incoming TCH to TCH HOs controlled by the MSC.


Updated: When the HO is completed.

See figures:- Successful external TCH to TCH handover, target BSC- Successful external TCH TCH HSCSD handover from four to one channel, target BSC- Successful external TCH TCH HSCSD handover from one to two channels, target BSC




004000: MSC I SUCCESS HO

Operability class:






Counter ID: 004044 Network element name: MSC I SDCCH TCH

Version: 4.0 NetAct name: MSC_I_SDCCH_TCH

60 DN9813636




2.46 004045 / MSC I SDCCH

Description: Number of successful incoming SDCCH to TCH HOs controlled by the MSC.


Updated: When a directed retry procedure is completed.

See figure External directed retry, target BSC





Operability class:






Counter ID: 004045 Network element name: MSC I SDCCH

Version: 4.0 NetAct name: MSC_I_SDCCH

Description: Number of successful incoming SDCCH to SDCCH HOs controlled by the MSC.



See figure Successful external SDCCH to SDCCH handover, target BSC





Operability class:






DN9813636 61



2.47 004046 / MSC I TCH TCH AT

2.48 004047 / MSC I SDCCH TCH AT

Counter ID: 004046 Network element name: MSC I TCH TCH AT

Version: 4.0 NetAct name: MSC_I_TCH_TCH_AT

Description: Number of attempts to incoming TCH to TCH HOs controlled by the MSC.

Updated: When the HO attempt is started.

See figures:- Successful external TCH to TCH handover, target BSC- Unsuccessful external TCH to TCH handover due to a lack of resources, target BSC- Unsuccessful external TCH to TCH handover due to a failure in the activation of a new channel, target BSC- Unsuccessful external TCH to TCH handover due to MS returning to the old channel, target BSC- Unsuccessful external TCH to TCH handover because no radio resources are avail-able due to switch_crc_pool, target BSC- Unsuccessful external TCH to TCH handover due to a radio link failure during han-dover, target BSC- Unsuccessful external TCH to TCH handover, target BSC- Successful external TCH TCH HSCSD handover from four to one channel, target BSC- Successful external TCH TCH HSCSD handover from one to two channels, target BSC




Operability class:






Counter ID: 004047 Network element name: MSC I SDCCH TCH AT

Version: 4.0 NetAct name: MSC_I_SDCCH_TCH_AT

Description: Number of attempts to incoming SDCCH to TCH HOs controlled by the MSC.

Updated: When a directed retry procedure is started.

See figure External directed retry, target BSC

62 DN9813636




2.49 004048 / MSC I SDCCH AT

2.50 004049 / MSC O TCH TCH




Operability class:

Related to feature:

BSS6115: Radio Channel Allocation Enhancements






Counter ID: 004048 Network element name: MSC I SDCCH AT

Version: 4.0 NetAct name: MSC_I_SDCCH_AT

Description: Number of attempts to incoming SDCCH to SDCCH HOs controlled by the MSC.


See figure Successful external SDCCH to SDCCH handover, target BSC




Operability class:






Counter ID: 004049 Network element name: MSC O TCH TCH

Version: 4.0 NetAct name: MSC_O_TCH_TCH

Description: Number of successful outgoing TCH to TCH HOs controlled by the MSC.

DN9813636 63



2.51 004050 / MSC O SDCCH TCH


See figures:- Successful external TCH to TCH handover, source BSC- Successful handover type reselection from an internal intra-cell TCH to TCH handover to an external handover due to switching the circuit pool- Successful handover type reselection from an internal inter-cell TCH to TCH handover to an external handover due to switching the circuit pool- Successful external TCH TCH HSCSD handover from two to two channels, source BSC




Operability class:






Counter ID: 004050 Network element name: MSC O SDCCH TCH

Version: 4.0 NetAct name: MSC_O_SDCCH_TCH

Description: Number of successful outgoing SDCCH to TCH HOs controlled by the MSC.

Updated: When a directed retry procedure is completed.

See figure External directed retry, source BSC




Operability class:

Related to feature:







64 DN9813636




2.52 004051 / MSC O SDCCH

2.53 004052 / MSC O TCH TCH AT

Counter ID: 004051 Network element name: MSC O SDCCH

Version: 4.0 NetAct name: MSC_O_SDCCH

Description: Number of successful outgoing SDCCH to SDCCH HOs controlled by the MSC.


See figure Successful external SDCCH to SDCCH handover, source BSC




Operability class:






Counter ID: 004052 Network element name: MSC O TCH TCH AT

Version: 4.0 NetAct name: MSC_O_TCH_TCH_AT

Description: Number of attempts to outgoing TCH to TCH HOs controlled by the MSC.


See figures:- Successful external TCH to TCH handover, source BSC- Successful handover type reselection from an internal intra-cell TCH to TCH handover to an external handover due to switching the circuit pool- Successful handover type reselection from an internal inter-cell TCH to TCH handover to an external handover due to switching the circuit pool- Successful external TCH TCH HSCSD handover from two to two channels, source BSC




Operability class:



DN9813636 65



2.54 004053 / MSC O SDCCH TCH AT

2.55 004054 / MSC O SDCCH AT




Counter ID: 004053 Network element name: MSC O SDCCH TCH AT

Version: 4.0 NetAct name: MSC_O_SDCCH_TCH_AT

Description: Number of attempts to outgoing SDCCH to TCH HOs controlled by the MSC.

Updated: When a directed retry procedure is started.

See figure External directed retry, source BSC




Operability class:

Related to feature:







Counter ID: 004054 Network element name: MSC O SDCCH AT

Version: 4.0 NetAct name: MSC_O_SDCCH_AT

Description: Number of attempts to outgoing SDCCH to SDCCH HOs controlled by the MSC.


See figure Successful external SDCCH to SDCCH handover, source BSC




Operability class:


66 DN9813636




2.56 004055 / MSC O FAIL LACK

2.57 004056 / BSC I TCH TCH





Counter ID: 004055 Network element name: MSC O FAIL LACK

Version: 4.0 NetAct name: MSC_O_FAIL_LACK

Description: Number of outgoing HOs, controlled by the MSC, that are unsuccessful because there are no radio resources available in the target cell.

Impact: HO failure


Updated: a) When no SDCCH is available in the target cell for an SDCCH HO.b) When no TCH is available in the target cell for a TCH HO.c) When no TCH is available in the target cell for an SDCCH to TCH HO.d) When no terrestrial channel is available in the target cell.e) When the GSM timer T7 expires

See figures:- Unsuccessful external TCH to TCH handover due to a lack of resources, source BSC- Unsuccessful external TCH to TCH handover because the MSC rejects the handover due to various causes, source BSC- Unsuccessful external TCH or TCH handover, source BSC




Operability class:






Counter ID: 004056 Network element name: BSC I TCH TCH

Version: 4.0 NetAct name: BSC_I_TCH_TCH

DN9813636 67



2.58 004057 / BSC I SDCCH TCH

Description: Number of successful incoming TCH to TCH HOs controlled by the BSC.



See figures:- Successful internal inter-cell TCH to TCH handover- Successful internal inter-cell TCH TCH HSCSD handover from three to one channel- Successful internal inter-cell TCH TCH HSCSD handover from two to three channels- Internal inter-cell direct access from the TCH on a child TRX to the TCH on a parent TRX




004010: BSC I SUCCESS HO

Operability class:






Counter ID: 004057 Network element name: BSC I SDCCH TCH

Version: 4.0 NetAct name: BSC_I_SDCCH_TCH

Description: Number of successful incoming SDCCH to TCH HOs controlled by the BSC.


Updated: a) When a directed retry procedure is completed.b) When the direct access to the super-reuse TRX is completed.c) When the TCH assignment to the super-reuse TRX is completed.

See figures:- Internal inter-cell directed retry, including software BSS6114 TCH assignment to the super-reuse TRX in IUO





Operability class:

68 DN9813636




2.59 004058 / BSC I SDCCH

2.60 004059 / BSC I TCH TCH AT

Related to feature:

BSS6114: Handover Enhancements






Used from release: S2 Definition updated in release:S7

Counter ID: 004058 Network element name: BSC I SDCCH

Version: 4.0 NetAct name: BSC_I_SDCCH

Description: Number of successful incoming SDCCH to SDCCH HOs controlled by the BSC.



See figure Successful internal inter-cell SDCCH to SDCCH handover





Operability class:






Counter ID: 004059 Network element name: BSC I TCH TCH AT

Version: 4.0 NetAct name: BSC_I_TCH_TCH_AT

Description: Number of attempts to incoming TCH to TCH HOs controlled by the BSC.

DN9813636 69



2.61 004060 / BSC I SDCCH TCH AT






Operability class:






Counter ID: 004060 Network element name: BSC I SDCCH TCH AT

Version: 4.0 NetAct name: BSC_I_SDCCH_TCH_AT

Description: Number of attempts to incoming SDCCH to TCH HOs controlled by the BSC.

Updated: a) When a directed retry procedure is started.b) When the direct access to the super-reuse TRX is started.c) When the TCH assignment to the super-reuse TRX is started.





Operability class:

Related to feature:







70 DN9813636




2.62 004061 / BSC I SDCCH AT

2.63 004062 / BSC I NONOPT


Counter ID: 004061 Network element name: BSC I SDCCH AT

Version: 4.0 NetAct name: BSC_I_SDCCH_AT

Description: Number of attempts to incoming SDCCH to SDCCH HOs controlled by the BSC.






Operability class:






Counter ID: 004062 Network element name: BSC I NONOPT

Version: 4.0 NetAct name: BSC_I_NONOPT

Description: Number of successful incoming HOs to a non-optimum cell controlled by the BSC.

Updated: When a HO to a target cell other than the first one in the list of candidate target cells is completed.

See figures:- Successful internal inter-cell TCH to TCH handover- Successful internal inter-cell SDCCH to SDCCH handover- Internal inter-cell directed retry, including software BSS6114 TCH assignment to the super-reuse TRX in IUO- Successful internal inter-cell TCH TCH HSCSD handover from three to one channel- Successful internal inter-cell TCH TCH HSCSD handover from two to three channels




DN9813636 71



2.64 004063 / BSC I NONOPT AT

2.65 004064 / BSC O TCH TCH

Operability class:






Counter ID: 004063 Network element name: BSC I NONOPT AT

Version: 4.0 NetAct name: BSC_I_NONOPT_AT

Description: Number of attempts to incoming HOs to a non-optimum cell controlled by the BSC.

Updated: When a HO to a target cell other than the first one in the list of candidate target cells is started.

See figures:- Successful internal inter-cell TCH to TCH handover- Successful internal inter-cell SDCCH to SDCCH handover- Internal inter-cell directed retry, including software BSS6114 TCH assignment to the super-reuse TRX in IUO- Unsuccessful internal inter-cell TCH to TCH handover due to a lack of resources- Unsuccessful internal inter-cell TCH to TCH handover because no radio resources are available due to switch_crc_pool- Successful internal inter-cell TCH TCH HSCSD handover from three to one channel- Successful internal inter-cell TCH TCH HSCSD handover from two to three channels




Operability class:






Counter ID: 004064 Network element name: BSC O TCH TCH

Version: 4.0 NetAct name: BSC_O_TCH_TCH

72 DN9813636




2.66 004065 / BSC O SDCCH TCH

Description: Number of successful outgoing TCH to TCH HOs controlled by the BSC.







004014: BSC O SUCCESS HO

Operability class:






Counter ID: 004065 Network element name: BSC O SDCCH TCH

Version: 4.0 NetAct name: BSC_O_SDCCH_TCH

Description: Number of successful outgoing TCH HOs controlled by the BSC.


Updated: a) When a directed retry procedure is completed.b) When the direct access from the SDCCH to TCH on a super-reuse TRX is com-pleted.c) When the intelligent directed retry is completed.d) When the TCH assignment to a super-reuse TRX is completed.






DN9813636 73



2.67 004066 / BSC O SDCCH

2.68 004067 / BSC O TCH TCH AT

Operability class:

Related to feature:








Counter ID: 004066 Network element name: BSC O SDCCH

Version: 4.0 NetAct name: BSC_O_SDCCH

Description: Number of successful outgoing SDCCH to SDCCH HOs controlled by the BSC.








Operability class:






Counter ID: 004067 Network element name: BSC O TCH TCH AT

Version: 4.0 NetAct name: BSC_O_TCH_TCH_AT

Description: Number of attempts to outgoing TCH to TCH HOs controlled by the BSC.

74 DN9813636




2.69 004068 / BSC O SDCCH TCH AT






Operability class:

Related to feature:

BSS7057: Direct Access to Super Re-use TRX in IUO






Counter ID: 004068 Network element name: BSC O SDCCH TCH AT

Version: 4.0 NetAct name: BSC_O_SDCCH_TCH_AT

Description: Number of attempts to outgoing SDCCH to TCH HOs controlled by the BSC.

Updated: a) When a directed retry procedure is started.b) When the direct access from the SDCCH to TCH on a super-reuse TRX is started.c) When the intelligent directed retry is started.d) When the TCH assignment to a super-reuse TRX is started.





Operability class:

Related to feature:





DN9813636 75



2.70 004069 / BSC O SDCCH AT

2.71 004070 / BSC O NONOPT




Counter ID: 004069 Network element name: BSC O SDCCH AT

Version: 4.0 NetAct name: BSC_O_SDCCH_AT

Description: Number of attempts to outgoing SDCCH to SDCCH HOs controlled by the BSC.






Operability class:






Counter ID: 004070 Network element name: BSC O NONOPT

Version: 4.0 NetAct name: BSC_O_NONOPT

Description: Number of successful outgoing HOs to a non-optimum cell controlled by the BSC.

Updated: When a HO to a target cell other than the first one in the list of candidate target cells is completed.

See figures:- Successful internal inter-cell TCH to TCH handover- Successful internal inter-cell SDCCH to SDCCH handover- Internal inter-cell directed retry, including software BSS6114 TCH assignment to the super-reuse TRX in IUO- Successful internal inter-cell TCH TCH HSCSD handover from three to one channel- Successful internal inter-cell TCH TCH HSCSD handover from two to three channels


76 DN9813636




2.72 004071 / BSC O NONOPT AT



Operability class:






Counter ID: 004071 Network element name: BSC O NONOPT AT

Version: 4.0 NetAct name: BSC_O_NONOPT_AT

Description: Number of attempts to outgoing HOs to a non-optimum cell controlled by the BSC.

Updated: When a HO to a target cell other than the first one in the list of candidate target cells is started.

See figures:- Successful internal inter-cell TCH to TCH handover- Successful internal inter-cell SDCCH to SDCCH handover- Internal inter-cell directed retry, including software BSS6114 TCH assignment to the super-reuse TRX in IUO- Unsuccessful internal inter-cell TCH to TCH handover due to a lack of resources- Unsuccessful internal inter-cell TCH to TCH handover because no radio resources are available due to switch_crc_pool- Successful internal inter-cell TCH TCH HSCSD handover from three to one channel- Successful internal inter-cell TCH TCH HSCSD handover from two to three channels




Operability class:






DN9813636 77



2.73 004072 / BSC O FAIL LACK

2.74 004073 / CELL TCH TCH

Counter ID: 004072 Network element name: BSC O FAIL LACK

Version: 4.0 NetAct name: BSC_O_FAIL_LACK

Description: Number of BSC-controlled outgoing handovers that are unsuccessful due to lack of resources.

Impact: HO failure


Updated: a) When no SDCCH is available in the target cell for an SDCCH HO.b) When no TCH is available in the target cell for a TCH HO.c) When no TCH is available in the target cell for an SDCCH to TCH HO.

See figure Unsuccessful internal inter-cell TCH to TCH handover due to a lack of resources




Operability class:






Counter ID: 004073 Network element name: CELL TCH TCH

Version: 4.0 NetAct name: CELL_TCH_TCH

Description: Number of successful intra-cell (TCH to TCH) HOs.



See figures:- Successful internal intra-cell TCH to TCH handover- Successful internal intra-cell TCH TCH HSCSD handover from two to one channel- Successful internal intra-cell TCH TCH HSCSD handover from one to three channels



78 DN9813636




2.75 004074 / CELL SDCCH TCH


004018: INT CELL SUCCESS HO

Operability class:






Counter ID: 004074 Network element name: CELL SDCCH TCH

Version: 4.0 NetAct name: CELL_SDCCH_TCH

Description: Number of successful intra-cell (SDCCH to TCH) HOs.


Updated: a) When a channel assignment to a super-reuse TRX in an IUO DR is com-pleted.b) When the direct access to a super-reuse TRX is completed.

See figures:- Internal intra-cell directed retry including software BSS6114: TCH assignment to the super-reuse TRX in IUO- Internal intra-cell direct access from regular DCCH to a super-reuse TRX





Operability class:

Related to feature:








DN9813636 79



2.76 004075 / CELL SDCCH

2.77 004076 / CELL TCH TCH AT

Counter ID: 004075 Network element name: CELL SDCCH

Version: 4.0 NetAct name: CELL_SDCCH

Description: Number of successful intra-cell (SDCCH to SDCCH) HOs.



See figure Successful internal intra-cell SDCCH to SDCCH handover





Operability class:






Counter ID: 004076 Network element name: CELL TCH TCH AT

Version: 4.0 NetAct name: CELL_TCH_TCH_AT

Description: Number of attempts of intra-cell (TCH to TCH) HOs.


See figures:- Successful internal intra-cell TCH to TCH handover- Successful internal intra-cell TCH TCH HSCSD handover from two to one channel- Successful internal intra-cell TCH TCH HSCSD handover from one to three channels




Operability class:




80 DN9813636




2.78 004077 / CELL SDCCH TCH AT

2.79 004078 / CELL SDCCH AT



Counter ID: 004077 Network element name: CELL SDCCH TCH AT

Version: 4.0 NetAct name: CELL_SDCCH_TCH_AT

Description: Number of attempts of intra-cell (SDCCH to TCH) HOs.

Updated: a) When a channel assignment to a super-reuse TRX in an IUO DR is started.b) When the direct access to a super-reuse TRX is started.

See figures:- Internal intra-cell directed retry including software BSS6114: TCH assignment to the super-reuse TRX in IUO- Internal intra-cell direct access from regular DCCH to a super-reuse TRX




Operability class:

Related to feature:








Counter ID: 004078 Network element name: CELL SDCCH AT

Version: 4.0 NetAct name: CELL_SDCCH_AT

Description: Number of attempts of intra-cell (SDCCH to SDCCH) HOs.


See figure Successful internal intra-cell SDCCH to SDCCH handover




DN9813636 81



2.80 004079 / CAUSE DIR RETRY

2.81 004080 / MSC I END OF HO

Operability class:






Counter ID: 004079 Network element name: CAUSE DIR RETRY

Version: 4.0 NetAct name: CAUSE_DIR_RETRY

Description: Number of HO attempts due to directed retry.

Updated: See figures:- Internal intra-cell directed retry including software BSS6114: TCH assignment to the super-reuse TRX in IUO- Internal inter-cell directed retry, including software BSS6114 TCH assignment to the super-reuse TRX in IUO- External directed retry, source BSC




Operability class:

Related to feature:








Counter ID: 004080 Network element name: MSC I END OF HO

Version: 4.1 NetAct name: MSC_I_END_OF_HO

82 DN9813636




2.82 004081 / BSC I END OF HO

Description: Number of end of handover procedures in incoming HOs that are con-trolled by the MSC.

Dependency:b) Counter 004108 is updated along with this counter.

Impact:- HO failure- Possibly call cleared


Updated: a) When the MS returns onto the source channel.b) When the MS is lost during the HO.c) When the call is cleared during the HO either by the subscriber, or by messages from the MS concerning - the start of channel blocking - the A interface speech circuits - state changes of the BSSAP subsystem - an abnormal release of the SCCP connec-tiond) When the call is cleared during the HO by a message received from the MSC con-cerning the resetting of the circuits or the BCSU/BCXU restart (if the TCHs related to the HO are in that BCSU/BCXU)

See figures:- Unsuccessful external TCH to TCH handover due to MS returning to the old channel, target BSC- Unsuccessful external TCH to TCH handover, target BSC





Operability class:






Counter ID: 004081 Network element name: BSC I END OF HO

Version: 4.0 NetAct name: BSC_I_END_OF_HO

DN9813636 83



2.83 004082 / BSC O MS REQ ENQ PROC

Description: Number of end of handover procedures in the incoming HOs that are controlled by the BSC.

Dependencies:a) Counter 004038 is updated along with this counter.b) Counter 004042 is updated along with this counter.c) Counter 004017 is updated along with this counter.

Impact:- HO failure- Possibly call cleared


Updated: a) When it is not allowed to execute a HO at the current phase of the call.b) When the call is cleared during the HO.c) When the connection between the MS and the BTS is broken (on the source chan-nel), that is, when a message carrying an indication of a connection failure is received (radio link failure or transcoder failure).

See figures:- Unsuccessful internal inter-cell TCH to TCH handover because a handover is not allowed at this phase of the call- Unsuccessful internal inter-cell TCH to TCH handover due to call clearing during handover- Unsuccessful internal inter-cell TCH to TCH handover due to a radio link failure during handover





004038: BSC O HO NOT ALLOWED

004042: BSC O CALL CLEAR DURING HO

Operability class:






Counter ID: 004082 Network element name: BSC O MS REQ ENQ PROC

Version: 4.0 NetAct name: BSC_O_CAND_ENQ

84 DN9813636




2.84 004083 / BSC I DROP CALLS






Operability class:






Counter ID: 004083 Network element name: BSC I DROP CALLS

Version: 4.0 NetAct name: BSC_I_DROP_CALLS

Description: Number of calls that are dropped during incoming HOs controlled by the BSC.

Dependencies:a) Counters 004012, 004016 and 004084 are updated along with this counter.b) Counters 004013, 004017 and 004084 are updated along with this counter.


Updated: a) When the MS is lost (timer T3103 expires).b) When switching from a unidirectional to a bi-directional speech path fails.

See figures:- Unsuccessful internal inter-cell TCH to TCH handover due to losing the MS during handover. The GSM timer T3103 expires- Unsuccessful internal inter-cell TCH to TCH handover caused by internal timer expiry or a failure in the connection of a bi-directional speech path









Operability class:

DN9813636 85



2.85 004084 / BSC O DROP CALLS






Counter ID: 004084 Network element name: BSC O DROP CALLS

Version: 4.0 NetAct name: BSC_O_DROP_CALLS

Description: Number of calls that are dropped during outgoing HOs controlled by the BSC.

Dependencies:a) Counters 004012, 004016 and 004083 are updated along with this counter.b) Counters 004013, 004017 and 004083 are updated along with this counter.



See figures:- Unsuccessful internal inter-cell TCH to TCH handover due to losing the MS during handover. The GSM timer T3103 expires- Unsuccessful internal inter-cell TCH to TCH handover caused by internal timer expiry or a failure in the connection of a bi-directional speech path









Operability class:






86 DN9813636




2.86 004085 / CELL DROP CALLS

2.87 004086 / CAUSE PREEMPTION

Counter ID: 004085 Network element name: CELL DROP CALLS

Version: 4.0 NetAct name: CELL_DROP_CALLS

Description: Number of calls dropped during intra-cell HOs.

Dependencies:a) Counter 004020 is updated along with this counter.b) Counter 004021 is updated along with this counter.



See figure Unsuccessful internal intra-cell TCH to TCH handover due to losing the MS during handover. The GSM timer T3107 expires




004020: INT CELL UNSUCCESS HO DUE MOVE

004021: INT CELL UNSUCCESS HO DUE BSS PROBLEM

Operability class:






Counter ID: 004086 Network element name: CAUSE PREEMPTION

Version: 4.0 NetAct name: CAUSE_PRE_EMPTION

Description: Number of HO attempts due to pre-emption.

Updated: When a HO is started due to pre-emption.


DN9813636 87



2.88 004087 / CAUSE FIELD DROP

2.89 004088 / CAUSE LOW DISTANCE




Operability class:






Counter ID: 004087 Network element name: CAUSE FIELD DROP

Version: 4.0 NetAct name: CAUSE_FIELD_DROP

Description: Number of HO attempts caused by rapid field drop.

Updated: When a HO is started due to rapid field drop.





Operability class:






Counter ID: 004088 Network element name: CAUSE LOW DISTANCE

Version: 4.0 NetAct name: CAUSE_LOW_DISTANCE

Description: Number of HO attempts caused by low distance.

88 DN9813636




2.90 004089 / CAUSE BAD CI RATIO

Updated: When a HO is started due to low distance.





Operability class:






Counter ID: 004089 Network element name: CAUSE BAD CI RATIO

Version: 4.0 NetAct name: CAUSE_BAD_CI

Description: Number of HO attempts caused by a poor C/I ratio on the super-reuse frequency.

This counter increases by one either when the downlink C/I ratio of the super-reuse TRX becomes worse or when the MS-BS distance reaches the relevant HO threshold. For more information, see Threshold comparison in Intelligent Underlay-Overlay.

Updated: When a HO is started due to a poor C/I ratio.

See figures:- Successful internal intra-cell TCH to TCH handover- Successful internal inter-cell TCH to TCH handover- Successful internal intra-cell SDCCH to SDCCH handover- Successful internal inter-cell SDCCH to SDCCH handover




Operability class:



DN9813636 89



2.91 004090 / CAUSE GOOD CI RATIO

2.92 004091 / HO DUE SLOW MOV MS




Counter ID: 004090 Network element name: CAUSE GOOD CI RATIO

Version: 4.0 NetAct name: CAUSE_GOOD_CI

Description: Number of HO attempts caused by a good C/I ratio on the super-reuse frequency.

Updated: When a HO is started due to a good C/I ratio.

See figures:- Successful internal intra-cell TCH to TCH handover- Successful internal inter-cell TCH to TCH handover- Successful internal intra-cell SDCCH to SDCCH handover- Successful internal inter-cell SDCCH to SDCCH handover




Operability class:






Counter ID: 004091 Network element name: HO DUE SLOW MOV MS

Version: 4.0 NetAct name: HO_DUE_SLOW_MOV_MS

Description: Number of HOs caused by a slowly moving MS in the macro cell.

Updated: When a HO is started due to a slowly moving MS.



90 DN9813636




2.93 004092 / MSC I ATT SWITCH CIRC POOL



Operability class:






Counter ID: 004092 Network element name: MSC I ATT SWITCH CIRC POOL

Version: 4.0 NetAct name: MSC_I_ATT_SWITCH_CIRC_POOL

Description: Number of intra-system HO attempts started due to the cause switch_circuit_pool.

Updated: When the cause switch_circuit_pool is received in the HANDOVER REQUIRED message from the A interface.

See figures:- Successful external TCH to TCH handover, target BSC- Successful external SDCCH to SDCCH handover, target BSC- Unsuccessful external TCH to TCH handover due to a failure in the activation of a new channel, target BSC- Unsuccessful external TCH to TCH handover due to MS returning to the old channel, target BSC- Unsuccessful external TCH to TCH handover because no radio resources are avail-able due to switch_crc_pool, target BSC- Unsuccessful external TCH to TCH handover due to a radio link failure during han-dover, target BSC- Unsuccessful external TCH to TCH handover, target BSC




004046: MSC I TCH TCH AT

Operability class:

Related to feature:

BSS5010: Half Rate





DN9813636 91



2.94 004093 / MSC I SUCC SWITCH CIRC POOL

2.95 004094 / MSC O ATT SWITCH CIRC POOL


Counter ID: 004093 Network element name: MSC I SUCC SWITCH CIRC POOL

Version: 4.0 NetAct name: MSC_I_SUCC_SWITCH_CIRC_POOL

Description: Number of incoming successful intra-system HOs started due to the cause switch_circuit_pool.

Updated: When the HO due to the cause switch_circuit_pool from the A interface is completed.

See figures:- Successful external TCH to TCH handover, target BSC- Successful external SDCCH to SDCCH handover, target BSC





Operability class:

Related to feature:

BSS5010: Half Rate






Counter ID: 004094 Network element name: MSC O ATT SWITCH CIRC POOL

Version: 4.0 NetAct name: MSC_O_ATT_SWITCH_CIRC_POOL

Description: Number of HO attempts started due to the cause switch_circuit_pool.


92 DN9813636




2.96 004095 / MSC O SUCC SWITCH CIRC POOL

Updated: When cause switch_circuit_pool is sent to the A interface in the HANDOVER_REQUIRED message.

See figures:- Successful handover type reselection from an internal intra-cell TCH to TCH handover to an external handover due to switching the circuit pool- Successful handover type reselection from an internal inter-cell TCH to TCH handover to an external handover due to switching the circuit pool




004052: MSC O TCH TCH AT

Operability class:

Related to feature:

BSS5010: Half Rate






Counter ID: 004095 Network element name: MSC O SUCC SWITCH CIRC POOL

Version: 4.0 NetAct name: MSC_O_SUCC_SWITCH_CIRC_POOL

Description: Number of successful HOs started due to the cause switch_circuit_pool.


Updated: When the HO due to the cause switch_circuit_pool from the A interface is completed.

See figures:- Successful external TCH to TCH handover, source BSC- Successful external SDCCH to SDCCH handover, source BSC- Successful handover type reselection from an internal intra-cell TCH to TCH handover to an external handover due to switching the circuit pool- Successful handover type reselection from an internal inter-cell TCH to TCH handover to an external handover due to switching the circuit pool





DN9813636 93



2.97 004096 / BSC O UNSUCC A INT CIRC TYPE

Operability class:

Related to feature:

BSS5010: Half Rate






Counter ID: 004096 Network element name: BSC O UNSUCC A INT CIRC TYPE

Version: 4.0 NetAct name: BSC_O_UNSUCC_A_INT_CIRC_TYPE

Description: Number of outgoing HOs that are unsuccessful due to a wrong A inter-face circuit type.


Impact: HO failure

Reason for the impact: External /A interface

Updated: When an internal outgoing inter-cell HO attempt is interrupted because the BSC wants to change the A interface circuit pool before TCH allocation.

See figures:- Unsuccessful internal inter-cell TCH to TCH handover because no radio resources are available due to switch_crc_pool- Successful handover type reselection from an internal inter-cell TCH to TCH handover to an external handover due to switching the circuit pool




004097: BSC I UNSUCC A INT CIRC TYPE

Operability class:

Related to feature:

BSS5010: Half Rate






94 DN9813636




2.98 004097 / BSC I UNSUCC A INT CIRC TYPE

2.99 004098 / INT UNSUCC A INT CIRC TYPE

Counter ID: 004097 Network element name: BSC I UNSUCC A INT CIRC TYPE

Version: 4.0 NetAct name: BSC_I_UNSUCC_A_INT_CIRC_TYPE

Description: Number of incoming HOs that are unsuccessful due to a wrong A inter-face circuit type.


Impact: HO failure


Updated: When an internal incoming inter-cell HO attempt is interrupted because the BSC wants to change the A interface circuit pool before TCH allocation.

See figures:- Unsuccessful internal inter-cell TCH to TCH handover because no radio resources are available due to switch_crc_pool- Successful handover type reselection from an internal inter-cell TCH to TCH handover to an external handover due to switching the circuit pool




004096: BSC O UNSUCC A INT CIRC TYPE

Operability class:

Related to feature:

BSS5010: Half Rate






Counter ID: 004098 Network element name: INT UNSUCC A INT CIRC TYPE

Version: 4.0 NetAct name: HO_UNSUCC_A_INT_CIRC_TYPE

Description: Number of HOs unsuccessful due to a wrong A interface circuit type.

Impact: HO failure


DN9813636 95



2.100 004099 / HO ATT DUE SWITCH CIRC POOL

Updated: When an internal intra-cell HO attempt is interrupted because the BSC wants to change the A interface circuit pool before TCH allocation.

See figures:- Unsuccessful internal intra-cell TCH to TCH handover because no radio resources are available due to switch_crc_pool- Successful handover type reselection from an internal intra-cell TCH to TCH handover to an external handover due to switching the circuit pool




Operability class:

Related to feature:

BSS5010: Half Rate






Counter ID: 004099 Network element name: HO ATT DUE SWITCH CIRC POOL

Version: 4.0 NetAct name: HO_ATT_DUE_SWITCH_CIRC_POOL

Description: Number of HO attempts started in order to change the A interface circuit type.

Updated: See figures:- Successful external TCH to TCH handover, source BSC- Successful external SDCCH to SDCCH handover, source BSC- Successful handover type reselection from an internal intra-cell TCH to TCH handover to an external handover due to switching the circuit pool- Successful handover type reselection from an internal inter-cell TCH to TCH handover to an external handover due to switching the circuit pool




Operability class:

Related to feature:

BSS5010: Half Rate




96 DN9813636




2.101 004100 / MSC O ADJ CELL ID ERR

2.102 004101 / MSC I UNSUCC DUE A IF CRC



Counter ID: 004100 Network element name: MSC O ADJ CELL ID ERR

Version: 4.0 NetAct name: MSC_O_ADJ_CELL_ID_ERR_C

Description: Number of errors in adjacent cell identification.

Impact: HO failure

Reason for the impact: Internal. Information on the adjacent cells is incorrect in the BSS Radio Network Configuration Database in the source BSC

Updated: a) When the BSC notices that the target cell information (BCCH frequency and/or BSIC) received in the HANDOVER_COMMAND message from the MSC differs from that in the source BSDATA (BSS Radio Network Configuration Data-base).b) When the MSC rejects the HO attempt due to the cause invalid_cell during a HO from SDCCH to TCH or from TCH to TCH .

See figures:- Unsuccessful external TCH to TCH handover because the MSC rejects the handover due to various causes, source BSC- Unsuccessful external TCH to TCH handover due to adjacent cell error, source BSC




Operability class:

Related to feature:

BSS5370: Target Cell Identifier Checking in External Handover






Counter ID: 004101 Network element name: MSC I UNSUCC DUE A IF CRC

Version: 4.0 NetAct name: MSC_CONTROLLED_IN_HO

DN9813636 97



2.103 004102 / MSC O UNSUCC DUE A IF CRC

Description: Number of incoming unsuccessful intra-system HOs due to a wrong A interface circuit type.

Updated: When the HO attempt ends as a result of a TCH allocation attempt which is unsuccessful because of a mismatch between the requested TCH channel type and the A interface circuit type. The cause switch_circuit_pool is sent in the HANDOVER FAILURE message to the A interface.

See figure Unsuccessful external TCH to TCH handover because no radio resources are available due to switch_crc_pool, target BSC




Operability class:

Related to feature:

BSS5010: Half Rate






Counter ID: 004102 Network element name: MSC O UNSUCC DUE A IF CRC

Version: 4.0 NetAct name: MSC_CONTROLLED_OUT_HO

Description: Number of HOs that are unsuccessful because of a wrong A interface circuit type.

Impact: HO failure


Updated: When an external HO attempt ends with the A interface causes circuit_pool_mismatch or switch_ circuit_pool.

This counter is updated also when a HO attempt initiated by the BSC is interrupted because there is no proper circuit pool or there is no free A interface circuit available in the proper pool.

See figure Unsuccessful external TCH to TCH handover because the MSC rejects the handover due to various causes, source BSC



98 DN9813636




2.104 004103 / HO FROM NORMAL TO EXT AREA

2.105 004104 / HO FROM EXT TO NORMAL AREA


Operability class:

Related to feature:

BSS5010: Half Rate






Counter ID: 004103 Network element name: HO FROM NORMAL TO EXT AREA

Version: 4.0 NetAct name: HO_NORMAL_TO_EXT

Description: Number of HOs from normal area to extended area.

Updated: When internal intra-cell HO start reason is cause DISTANCE (4027) and the HO is attempted from normal area to extended area.




Operability class:

Related to feature:

BSS6037: Extended Cell Range






Counter ID: 004104 Network element name: HO FROM EXT TO NORMAL AREA

Version: 4.0 NetAct name: HO_EXT_TO_NORMAL

Description: Number of HOs from extended area to normal area.

Updated: When internal intra-cell HO is started as a result of the cause LOW_DISTANCE (4088) and the HO attempt is from extended area to normal area.



DN9813636 99



2.106 004105 / HO DUE TO MS SLOW SPEED

2.107 004106 / HO DUE TO MS HIGH SPEED


Operability class:

Related to feature:

BSS6037: Extended Cell Range






Counter ID: 004105 Network element name: HO DUE TO MS SLOW SPEED

Version: 4.0 NetAct name: HO_DUE_MS_SLOW_SPEED

Description: Number of HOs due to a detected low speed MS.

Updated: When an internal inter-cell or external HO attempt is started because the speed of the MS is below the threshold value LSL (Lower Speed Limit).





Operability class:

Related to feature:

BSS6083: MS Speed Detection






Counter ID: 004106 Network element name: HO DUE TO MS HIGH SPEED

Version: 4.0 NetAct name: HO_DUE_MS_HIGH_SPEED

Description: Number of HOs due to a detected high speed MS.

100 DN9813636




2.108 004107 / MSC O CALL DROP DURING HO

Updated: When an internal inter-cell or external HO attempt is started because the speed of the MS has exceeded the threshold value USL (Upper Speed Limit).





Operability class:

Related to feature:

BSS6083: MS Speed Detection






Counter ID: 004107 Network element name: MSC O CALL DROP DURING HO

Version: 4.0 NetAct name: MSC_O_CALL_DROP_HO

Description: Number of calls that are dropped during external HOs, after HANDOVER_COMMAND is received from the MSC.



Updated: a) When a call is dropped during an external HO and after the BSC has received a HANDOVER_COMMAND message.b) When either the GSM timer T8 expires, or the MSC sends a CLEAR_COMMAND message to the BSC with other cause than call control or handover successful.

See figure Unsuccessful external TCH to TCH handover due to GSM timer T8 expiry, source BSC




004007: MSC O END OF HO

Operability class:

DN9813636 101



2.109 004108 / MSC I CALL POSS DROP DURING HO

Related to feature:

BSS7042: Measurement Improvements






Counter ID: 004108 Network element name: MSC I CALL POSS DROP DURING HO

Version: 4.0 NetAct name: MSC_I_CALL_POSS_DROP_HO

Description: Number of failures (the call may possibly be dropped) during external HOs, after the HO_REQUEST_ACK message is sent to the MSC.


Impact: Possibly call cleared

Updated: a) When a call is possibly dropped during an external HO, after the HO_REQUEST_ACK message is sent to the MSC.b) When the GSM timer T9113 expires or the MSC sends a CLEAR_COMMAND message to the BSC with some other cause than call control or radio interface failure revision to old channel.

See figure Unsuccessful external TCH to TCH handover, target BSC




004080: MSC I END OF HO

Operability class:

Related to feature:

BSS7042: Measurement Improvements






102 DN9813636




2.110 004109 / HO ATT DUE TO BAD RXLEV ON SUPER

2.111 004110 / HO ATT DUE TO GOOD RXLEV ON REGULAR

Counter ID: 004109 Network element name: HO ATT DUE TO BAD RXLEV ON SUPER

Version: 4.0 NetAct name: HO_ATT_DUE_BAD_SUPER_RXLEV

Description: Number of HO attempts due to a Bad Rxlevel on a super-reuse fre-quency.

Updated: When a HO is started due to a Bad Rxlevel on the super-reuse frequency.

See figure Successful internal intra-cell TCH to TCH handover




Operability class:

Related to feature:

BSS7064: Handover Support for ICE






Counter ID: 004110 Network element name: HO ATT DUE TO GOOD RXLEV ON REGULAR

Version: 4.0 NetAct name: HO_ATT_DUE_GOOD_REGULAR_RXLEV

Description: Number of HO attempts due to a Good Rxlevel on a regular frequency.

Updated: When a HO is started due to a Good Rxlevel on the regular frequency.





Operability class:

Related to feature:

BSS7064: Handover Support for ICE




DN9813636 103



2.112 004111 / HO ATT DUE ERFD

2.113 004112 / MSC O ATT FOR HSCSD



Counter ID: 004111 Network element name: HO ATT DUE ERFD

Version: 4.0 NetAct name: HO_ATT_DUE_ERFD

Description: Number of inter-cell HO attempts during an ERFD (Enhanced Rapid Field Drop) HO. All inter-cell HOs during ERFD HO are mapped to the ERFD HO counter.

Updated: When a HO is started due to ERFD.





Operability class:

Related to feature:

BSS7031: Enhanced Rapid Field Drop






Counter ID: 004112 Network element name: MSC O ATT FOR HSCSD

Version: 4.0 NetAct name: MSC_O_ATT_HSCSD

Description: Number of outgoing HO attempts for HSCSD calls controlled by the MSC.

Counter 004052 or 004053 will also be updated.

Updated: When a HO attempt for HSCSD connection is started.

See figure Successful external TCH TCH HSCSD handover from two to two channels, source BSC


104 DN9813636




2.114 004113 / MSC O SUCC FOR HSCSD



004052: MSC O TCH TCH AT

004053: MSC O SDCCH TCH AT

Operability class:

Related to feature:

BSS7003: High Speed Circuit Switched Data (HSCSD)






Counter ID: 004113 Network element name: MSC O SUCC FOR HSCSD

Version: 4.0 NetAct name: MSC_O_SUCC_HSCSD

Description: Number of successful outgoing HOs for HSCSD calls controlled by the MSC.

Counter 004049 or 004050 and counter 004004 will also be updated.

Updated: When a HO attempt for HSCSD connection is completed.

See figure Successful external TCH TCH HSCSD handover from two to two channels, source BSC




004004: MSC O SUCCESS HO


004050: MSC O SDCCH TCH

Operability class:

Related to feature:







DN9813636 105



2.115 004114 / MSC I ATT FOR HSCSD

2.116 004115 / MSC I SUCC FOR HSCSD

Counter ID: 004114 Network element name: MSC I ATT FOR HSCSD

Version: 4.0 NetAct name: MSC_I_ATT_HSCSD

Description: Number of incoming HO attempts for HSCSD calls controlled by the MSC.


Updated: When a HO attempt for a multichannel connection is started.

See figures:- Successful external TCH TCH HSCSD handover from four to one channel, target BSC- Successful external TCH TCH HSCSD handover from one to two channels, target BSC




004046: MSC I TCH TCH AT

004047: MSC I SDCCH TCH AT

Operability class:

Related to feature:







Counter ID: 004115 Network element name: MSC I SUCC FOR HSCSD

Version: 4.0 NetAct name: MSC_I_SUCC_HSCSD

Description: Number of successful incoming HOs for HSCSD calls controlled by the MSC.


106 DN9813636




2.117 004116 / MSC I SUCC INC FOR HSCSD

Updated: When a HO attempt for a multichannel connection is completed.

See figures:- Successful external TCH TCH HSCSD handover from four to one channel, target BSC- Successful external TCH TCH HSCSD handover from one to two channels, target BSC






004044: MSC I SDCCH TCH

Operability class:

Related to feature:







Counter ID: 004116 Network element name: MSC I SUCC INC FOR HSCSD

Version: 4.0 NetAct name: MSC_I_SUCC_INC_HSCSD

Description: The number of channels in an MSC-controlled HO for an outgoing HSCSD call has increased.

Updated: When a current channel IE is included in the HANDOVER_REQUEST message and the number of allocated channels is greater in the target cell than in the source cell.

See figure Successful external TCH TCH HSCSD handover from one to two chan-nels, target BSC




Operability class:

Related to feature:




DN9813636 107



2.118 004117 / MSC I SUCC DEC FOR HSCSD

2.119 004118 / BSC O ATT FOR HSCSD




Counter ID: 004117 Network element name: MSC I SUCC DEC FOR HSCSD

Version: 4.0 NetAct name: MSC_I_SUCC_DEC_HSCSD

Description: The number of channels in an MSC-controlled HO for an outgoing HSCSD call has decreased.

Updated: When a current channel IE is included in the HANDOVER_REQUEST message and the number of allocated channels in the target cell is lower than in the source cell.

See figure Successful external TCH TCH HSCSD handover from four to one channel, target BSC




Operability class:

Related to feature:







Counter ID: 004118 Network element name: BSC O ATT FOR HSCSD

Version: 4.0 NetAct name: BSC_O_ATT_HSCSD

Description: Number of outgoing HO attempts for HSCSD calls controlled by the BSC.



See figures:- Successful internal inter-cell TCH TCH HSCSD handover from three to one channel- Successful internal inter-cell TCH TCH HSCSD handover from two to three channels

108 DN9813636




2.120 004119 / BSC O SUCC FOR HSCSD




004067: BSC O TCH TCH AT

004068: BSC O SDCCH TCH AT

Operability class:

Related to feature:







Counter ID: 004119 Network element name: BSC O SUCC FOR HSCSD

Version: 4.0 NetAct name: BSC_O_SUCC_HSCSD

Description: Number of successful outgoing HOs for HSCSD calls controlled by the BSC.


Updated: When a HO attempt for multichannel connection is completed.






004065: BSC O SDCCH TCH

Operability class:

Related to feature:







DN9813636 109



2.121 004120 / BSC I ATT FOR HSCSD

2.122 004121 / BSC I SUCC FOR HSCSD

Counter ID: 004120 Network element name: BSC I ATT FOR HSCSD

Version: 4.0 NetAct name: BSC_I_ATT_HSCSD

Description: Number of incoming HO attempts for HSCSD calls controlled by the BSC.







004059: BSC I TCH TCH AT

004060: BSC I SDCCH TCH AT

Operability class:

Related to feature:







Counter ID: 004121 Network element name: BSC I SUCC FOR HSCSD

Version: 4.0 NetAct name: BSC_I_SUCC_HSCSD

Description: Number of successful incoming HOs for HSCSD calls controlled by the BSC.


Updated: When a HO attempt for a multichannel connection is completed.




110 DN9813636




2.123 004122 / BSC I SUCC INC FOR HSCSD

2.124 004123 / BSC I SUCC DEC FOR HSCSD




004057: BSC I SDCCH TCH

Operability class:

Related to feature:







Counter ID: 004122 Network element name: BSC I SUCC INC FOR HSCSD

Version: 4.0 NetAct name: BSC_I_SUCC_INC_HSCSD

Description: The number of channels in an BSC-controlled HO for an outgoing HSCSD call has increased.

Updated: When a number of allocated channels in the target cell is greater than in the source cell.

See figure Successful internal inter-cell TCH TCH HSCSD handover from two to three channels




Operability class:

Related to feature:







Counter ID: 004123 Network element name: BSC I SUCC DEC FOR HSCSD

Version: 4.0 NetAct name: BSC_I_SUCC_DEC_HSCSD

DN9813636 111



2.125 004124 / INTRA ATT FOR HSCSD

Description: The number of channels in an BSC-controlled HO for an outgoing HSCSD call has decreased.

Updated: When a number of allocated channels in the target cell is lower than in the source cell.

See figure Successful internal inter-cell TCH TCH HSCSD handover from three to one channel




Operability class:

Related to feature:







Counter ID: 004124 Network element name: INTRA ATT FOR HSCSD

Version: 4.0 NetAct name: INTRA_ATT_HSCSD

Description: Number of intra-cell HO attempts for HSCSD calls.


Updated: When a HO attempt for multichannel connection is started.

See figures:- Successful internal intra-cell TCH TCH HSCSD handover from two to one channel- Successful internal intra-cell TCH TCH HSCSD handover from one to three channels




Operability class:

Related to feature:






112 DN9813636




2.126 004125 / INTRA SUCC FOR HSCSD

2.127 004126 / INTRA SUCC INC FOR HSCSD


Counter ID: 004125 Network element name: INTRA SUCC FOR HSCSD

Version: 4.0 NetAct name: INTRA_SUCC_HSCSD

Description: Number of successful intra-cell HOs for HSCSD calls.


Updated: When a HO attempt for multichannel connection is completed.

See figures:- Successful internal intra-cell TCH TCH HSCSD handover from two to one channel- Successful internal intra-cell TCH TCH HSCSD handover from one to three channels




004073: CELL TCH TCH

004074: CELL SDCCH TCH

Operability class:

Related to feature:







Counter ID: 004126 Network element name: INTRA SUCC INC FOR HSCSD

Version: 4.0 NetAct name: INTRA_SUCC_INC_HSCSD

Description: The number of channels in intra-cell HOs for an HSCSD call has increased.

Updated: When the number of allocated channels in the target TRX is greater than in the source TRX.

See figure Successful internal intra-cell TCH TCH HSCSD handover from one to three channels

DN9813636 113



2.128 004127 / INTRA SUCC DEC FOR HSCSD

2.129 004128 / HO ATT DUE TO DIRECT ACCESS




Operability class:

Related to feature:







Counter ID: 004127 Network element name: INTRA SUCC DEC FOR HSCSD

Version: 4.0 NetAct name: INTRA_SUCC_DEC_HSCSD

Description: The number of channels in intra-cell HOs for a HSCSD call has decreased.

Updated: When a number of allocated channels in the target TRX is lower than in the source TRX.

See figure Successful internal intra-cell TCH TCH HSCSD handover from two to one channel




Operability class:

Related to feature:







Counter ID: 004128 Network element name: HO ATT DUE TO DIRECT ACCESS

Version: 4.0 NetAct name: HO_ATT_DUE_DIRECT_ACCESS

114 DN9813636




2.130 004129 / HO ATT DUE TO DADLB

Description: Number of direct access attempts.

In the HO measurement, an intra-cell direct access is considered an intra-cell HO and correspondingly, an inter-cell direct access is considered an inter-cell HO.

Updated: When a HO is started with the cause direct access.

See figures:- Internal intra-cell direct access from regular DCCH to a super-reuse TRX




Operability class:

Related to feature:







Counter ID: 004129 Network element name: HO ATT DUE TO DADLB

Version: 4.0 NetAct name: HO_ATT_DUE_TO_DADLB

Description: The number of handover attempts started due to Direct Access to Desired Layer/Band (DADL/B).

Updated: When a HO is started with the cause DADL/B.

See figure Handover attempt due to DADL/B




Operability class:

Related to feature:

BSS8032: Direct Access to Desired Layer/Band






DN9813636 115



2.131 004130 / HO ATT DUE TO GPRS

2.132 004131 / INTRA CELL SUCCESS SDCCH HO BETWEEN BTSS

Counter ID: 004130 Network element name: HO ATT DUE TO GPRS

Version: 4.0 NetAct name: HO_ATT_DUE_TO_GPRS

Description: The number of handover attempts is started due to GPRS channel allo-cation.

Updated: When a HO is started with the request of the radio resource manager in order to enable an upgrade to the GPRS territory.

NOTE! This counter may show some values even if there has been no GPRS Traffic. Since the GPRS Territory method operates according to CS Traffic, this may cause upgrades and downgrades to the GPRS Territory and subsequently cause handovers to CS Calls triggering this counter.





Operability class:

Related to feature:

BSS09006: General Packet Radio Service (GPRS)






Counter ID: 004131 Network element name: INTRA CELL SUCCESS SDCCH HO BETWEEN BTSS

Version: 4.0 NetAct name: INTRA_CELL_SDCCH_HO_BTSS

Description: Number of completed and successful SDCCH-SDCCH handovers between two BTSs of the segment.

Updated: At the target BTS when the call has been successfully transferred to the target SDCCH.




Operability class:

116 DN9813636




2.133 004132 / INTRA CELL SUCCESS TCH HO BETWEEN BTSS

2.134 004133 / HO ATTEMPT INTER BAND SDCCH

Related to feature:

BSS10016: Common BCCH Control

BSS10046: Multi BCF Control






Counter ID: 004132 Network element name: INTRA CELL SUCCESS TCH HO BETWEEN BTSS

Version: 4.0 NetAct name: INTRA_CELL_TCH_HO_BTSS

Description: Number of completed and successful TCH to TCH handovers between the BTSs of the segment.

Updated: At the target BTS when the call has been successfully transferred to the target TCH.




Operability class:

Related to feature:








Counter ID: 004133 Network element name: HO ATTEMPT INTER BAND SDCCH

Version: 4.0 NetAct name: HO_ATT_INTER_BAND_SDCCH

DN9813636 117



2.135 004134 / INTRA CELL SUCCESS SDCCH HO BETWEEN BANDS

Description: Number of attempts to perform an SDCCH-SDCCH handover, based on the duration of an SDCCH reservation, from a BTS on the BCCH frequency band to a BTS on another frequency band of the segment.

Information on the success of the attempts can be seen on BSC level in counter 051136.

Updated: At the source BTS on BCCH frequency band whenever a handover attempt is made to move a call to an SDCCH on another frequency band of the segment. PGSM 900 and EGSM 900 are here regarded as different bands.




051136: INTRA INTER BAND SDCCH HANDOVER

Operability class:

Related to feature:







Counter ID: 004134 Network element name: INTRA CELL SUCCESS SDCCH HO BETWEEN BANDS

Version: 4.0 NetAct name: INTRA_CELL_SDCCH_HO_BANDS

Description: Number of completed and successful SDCCH-SDCCH handovers between two BTSs on different frequency bands of a segment. PGSM 900 and EGSM 900 are regarded as parts of the same GSM 900 frequency band.






004131: INTRA CELL SUCCESS SDCCH HO BETWEEN BTSS

Operability class:

118 DN9813636




2.136 004135 / HO ATTEMPT INTER BAND TCH

2.137 004136 / INTRA CELL SUCCESS TCH HO BETWEEN BANDS

Related to feature:







Counter ID: 004135 Network element name: HO ATTEMPT INTER BAND TCH

Version: 4.0 NetAct name: HO_ATT_INTER_BAND_TCH

Description: Number of attempts to perform a TCH to TCH handover between BTSs on different frequency bands of a segment due to load.

Information on the success of the attempts can be seen on BSC level in counter 051135.

Updated: At the source BTS whenever a handover is initiated in order to move a call to another band of the segment and, as a result, to decrease the load of the source BTS. PGSM 900 and EGSM 900 are regarded here as different bands.




051135: INTRA INTER BAND TCH HANDOVER

Operability class:

Related to feature:







Counter ID: 004136 Network element name: INTRA CELL SUCCESS TCH HO BETWEEN BANDS

Version: 4.0 NetAct name: INTRA_CELL_TCH_HO_BANDS

DN9813636 119



2.138 004137 / HO ATTEMPT INTER BTS TYPE SDCCH

Description: Number of completed and successful TCH to TCH handovers between two BTSs on different frequency bands of a segment. PGSM 900 and EGSM 900 are regarded as parts of the same GSM 900 frequency band.


Updated: At the target BTS when the call has been successfully transferred to the target TCH between GSM 900 and GSM 1800 bands in either direction.




004132: INTRA CELL SUCCESS TCH HO BETWEEN BTSS

Operability class:

Related to feature:







Counter ID: 004137 Network element name: HO ATTEMPT INTER BTS TYPE SDCCH

Version: 4.0 NetAct name: HO_ATT_INTER_BTS_TYPE_SDCCH

Description: Number of attempts to perform an SDCCH to SDCCH handover, based on the duration of an SDCCH reservation, from a BTS of some base station site type to a BTS of another type within a segment.

Information on the success of the attempts on BSC level can be seen in counter 051148.

Updated: At the source BTS whenever an attempt is made to move a call from an SDCCH in a BTS of some base station site type to an SDCCH in a BTS of another type in the segment, based on the duration of the source SDCCH reservation. Note that this counter is not updated when the handover attempt is made between the resources of different base station site types if the resources are also of different fre-quency bands. In such cases counter 004133 is updated instead.




051148: INTRA INTER BTS TYPE SDC

Operability class:

120 DN9813636




2.139 004138 / INTRA CELL SUCCESS SDCCH HO BETWEEN BTS TYPES

2.140 004139 / HO ATTEMPT INTER BTS TYPE TCH

Related to feature:







Counter ID: 004138 Network element name: INTRA CELL SUCCESS SDCCH HO BETWEEN BTS TYPES

Version: 4.0 NetAct name: INTRA_CELL_SDCCH_HO_BTS_TYPES

Description: Number of completed and successful SDCCH to SDCCH handovers from a BTS of one base station site type to a BTS of another type within a segment.


Updated: At the target BTS when the call has been successfully transferred to the target SDCCH and the handover was between BTSs of different base station site types within a segment.




004131: INTRA CELL SUCCESS SDCCH HO BETWEEN BTSS

Operability class:

Related to feature:







Counter ID: 004139 Network element name: HO ATTEMPT INTER BTS TYPE TCH

Version: 4.0 NetAct name: HO_ATT_INTER_BTS_TYPE_TCH

DN9813636 121



2.141 004140 / INTRA CELL SUCCESS TCH HO BETWEEN BTS TYPES

Description: Number of attempts to perform a TCH to TCH handover between differ-ent BTS types due to load reasons within a segment.

Information on the success of the attempts on BSC level can be seen in counter 051147.

Updated: At the source BTS whenever an attempt is made to move a call between different BTS types in order to decrease the load of the source BTS.




051147: INTRA INTER BTS TYPE TCH

Operability class:

Related to feature:







Counter ID: 004140 Network element name: INTRA CELL SUCCESS TCH HO BETWEEN BTS TYPES

Version: 4.0 NetAct name: INTRA_CELL_TCH_HO_BTS_TYPES

Description: Number of completed and successful TCH to TCH handovers from a BTS of one base station site type to a BTS of another type within a segment.


Updated: At the target BTS when the call has been successfully transferred to the target TCH and the handover was between BTSs of different base station site types within a segment.




004132: INTRA CELL SUCCESS TCH HO BETWEEN BTSS

Operability class:

Related to feature:




122 DN9813636




2.142 004141 / HO ATT DUE TO HSCSD

2.143 004142 / HO ATT FOR AMR TO HR




Counter ID: 004141 Network element name: HO ATT DUE TO HSCSD

Version: 4.0 NetAct name: HO_ATT_DUE_TO_HSCSD

Description: Number of intra cell handover attempts that are made due to the HSCSD traffic.

Updated: When an intra cell handover attempt is initiated for a single slot call in order to enable an upgrade for an GSCSD call.




Operability class:

Related to feature:







Counter ID: 004142 Network element name: HO ATT FOR AMR TO HR

Version: 4.0 NetAct name: HO_ATT_FOR_AMR_TO_HR

Description: Number of HO attempts from AMR FR to AMR HR.

Updated: When a channel rate change HO attempt for AMR FR call is started.




Operability class:

Related to feature:

BSS10004: Adaptive Multi Rate (AMR) Speech Codec




DN9813636 123



2.144 004143 / HO ATT FOR AMR TO FR

2.145 004144 / MSC I TCH HO FROM WCDMA RAN ATTEMPT



Counter ID: 004143 Network element name: HO ATT FOR AMR TO FR

Version: 4.0 NetAct name: HO_ATT_FOR_AMR_TO_FR

Description: Number of HO attempts from AMR HR to AMR FR.

Updated: When a channel rate change HO attempt for AMR HR call is started.




Operability class:

Related to feature:

BSS10004: Adaptive Multi Rate (AMR) Speech Codec






Counter ID: 004144 Network element name: MSC I TCH HO FROM WCDMA RAN ATTEMPT

Version: 4.0 NetAct name: MSC_TCH_HO_FROM_WCDMA_RAN_ATT

Description: Number of incoming (UTRAN to GSM) inter-system handover attempts.

Updated: When the HO attempt from UTRAN to GSM is started.




Operability class:

Related to feature:

BSS10101: Inter-System Handover





124 DN9813636




2.146 004145 / MSC I WCDMA RAN HO ATTEMPT UNSUCC DUE LACK

2.147 004146 / MSC I WCDMA RAN HO ATTEMPT UNSUCC DUE BSS PROBLEM

Used from release: S10.5 Definition updated in release:

Counter ID: 004145 Network element name: MSC I WCDMA RAN HO ATTEMPT UNSUCC DUE LACK

Version: 4.0 NetAct name: MSC_WCDMARAN_HO_ATT_UNSUC_LACK

Description: Number of incoming (UTRAN to GSM) handover requests rejected by the BSC due to lack of resources.

Updated: No channel is available for a HO and the HANDOVER_FAILURE message is sent to the MSC when UTRAN to GSM handover has been requested.




Operability class:

Related to feature:







Counter ID: 004146 Network element name: MSC I WCDMA RAN HO ATTEMPT UNSUCC DUE BSS PROBLEM

Version: 4.0 NetAct name: MSC_WCDMA_RAN_HO_ATT_UNSUC_BSS

Description: Number of incoming (UTRAN to GSM) handovers which are unsuccess-ful due to BSS problems.

Updated: Radio channel activation fails and the HANDOVER_FAILURE message is sent to the MSC when UTRAN to GSM handover has been requested.




Operability class:

DN9813636 125



2.148 004147 / MSC I WCDMA RAN END OF HO

Related to feature:







Counter ID: 004147 Network element name: MSC I WCDMA RAN END OF HO

Version: 4.1 NetAct name: MSC_WCDMA_RAN_END_OF_HO

Description: Number of the end of inter-system handover procedures in incoming (UTRAN to GSM) HOs.

Updated: When the call is cleared during the HO by a message received from the MSC concerning resetting the circuits or the BSCU/BCXU restart (if the TCHs related to the HO are in that BCSU/BCXU).

This may occur in the following situations:- MS returns to the source channel- MS is lost during the HO- Call is cleared during the HO either by the subscriber or by messages from the MS concerning -> the start of channel blocking -> the A interface speech circuits -> state changes of the BSSAP subsystem -> abnormal release of the SCCP connection




Operability class:

Related to feature:







126 DN9813636




2.149 004148 / MSC I UNSUCCESS HO WCDMA RAN DUE CONN

2.150 004149 / MSC I HO WCDMA RAN TCH SUCCESS

Counter ID: 004148 Network element name: MSC I UNSUCCESS HO WCDMA RAN DUE CONN

Version: 4.0 NetAct name: MSC_UNSUC_HO_WCDMARAN_DUE_CONN

Description: Number of incoming (UTRAN to GSM) inter-system HOs which are unsuccessful due to a connection failure.

Updated: When the connection between the MS and the BTS is broken (on the target channel), that is, when a message carrying an indication of a connection failure is received (radio link failure or transcoder failure).




Operability class:

Related to feature:







Counter ID: 004149 Network element name: MSC I HO WCDMA RAN TCH SUCCESS

Version: 4.0 NetAct name: MSC_HO_WCDMA_RAN_SUCC

Description: Number of successfully completed incoming (UTRAN to GSM) han-dovers.

Updated: When the inter-system handover (UTRAN to GSM) is acknowledged and completed, that is, the HANDOVER_REQUEST_ACKNOWLEDGE and the HANDOVER_COMPLETED messages are sent to the MSC.




Operability class:

Related to feature:





DN9813636 127



2.151 004150 / MSC O TCH HO TO WCDMA RAN ATTEMPT

2.152 004151 / MSC O HO TO WCDMA RAN NOT ALLOWED



Counter ID: 004150 Network element name: MSC O TCH HO TO WCDMA RAN ATTEMPT

Version: 4.0 NetAct name: MSC_TCH_HO_WCDMA_RAN_ATT

Description: Number of outgoing (GSM to WCDMA RAN) HO attempts controlled by the MSC. Signal strength (Ec/No) and the load of the serving GSM cell are above the thresholds.

Updated: The HANDOVER_REQUIRED message is sent to the MSC and the HO attempt is started.




Operability class:

Related to feature:







Counter ID: 004151 Network element name: MSC O HO TO WCDMA RAN NOT ALLOWED

Version: 4.0 NetAct name: MSC_HO_TO_WCDMA_RAN_NOT_ALLOW

Description: Number of outgoing (GSM to WCDMA RAN) inter-system HOs controlled by the MSC which are unsuccessful because HOs are not allowed.

Updated: The BSC does not send the HANDOVER_REQUIRED message to the MSC. When it is not allowed to execute an inter-system HO in the current phase of the call in progress.




Operability class:

128 DN9813636




2.153 004152 / MSC O END OF HO TO WCDMA RAN DUE BSS

2.154 004153 / MSC O GEN INTER SYSTEM TO WCDMA RAN HANDOVER REQ MESSAGES

Related to feature:







Counter ID: 004152 Network element name: MSC O END OF HO TO WCDMA RAN DUE BSS

Version: 4.0 NetAct name: MSC_END_OF_HO_WCDMARAN_DUE_BSS

Description: Number of the end of outgoing (GSM to WCDMA RAN) handover proce-dures due to BSS problems (outgoing HO controlled by the MSC).

Updated: When the connection between the MS and the BTS is broken (on the source channel), that is, when a message carrying an indication of connection failure is received (radio link failure or transcoder failure).

The counter is updated for- non-transparent data calls- transparent data calls- speech calls




Operability class:

Related to feature:







Counter ID: 004153 Network element name: MSC O GEN INTER SYSTEM TO WCDMA RAN HANDOVER REQ MESSAGES

DN9813636 129



2.155 004154 / MSC O GEN INTER SYSTEM TO WCDMA RAN HANDOVER COM MESSAGES

Version: 4.0 NetAct name: MSC_GEN_SYS_WCDMA_RAN_HO_REQ

Description: Total number of the HANDOVER_REQUIRED messages generated by outgoing (GSM to WCDMA RAN) inter-system HOs controlled by the MSC.

Updated: When the BSC sends the HANDOVER_REQUIRED message to the MSC.





Operability class:

Related to feature:







Counter ID: 004154 Network element name: MSC O GEN INTER SYSTEM TO WCDMA RAN HANDOVER COM MESSAGES

Version: 4.0 NetAct name: MSC_GEN_SYS_WCDMA_RAN_HO_COM

Description: Number of the INTER_SYSTEM_HANDOVER_TO_WCDMA_RAN_COMMAND messages gener-ated by outgoing (GSM to WCDMA RAN) inter-system HOs controlled by the MSC.

Updated: When HANDOVER COMMAND is sent to the MS.





Operability class:

130 DN9813636




2.156 004155 / MSC O TO WCDMA RAN FAIL LACK

2.157 004156 / MSC O END OF HO TO WCDMA RAN

Related to feature:







Counter ID: 004155 Network element name: MSC O TO WCDMA RAN FAIL LACK

Version: 4.0 NetAct name: MSC_TO_WCDMA_RAN_FAIL_LACK

Description: Number of outgoing (GSM to WCDMA RAN) inter-system HOs controlled by the MSC which are unsuccessful due to no radio resources available in the target cell.

Updated: The BSC has received the HANDOVER_REQUIRED_REJECT message from the MSC- when no channel is available in the target cell for an HO- when the GSM timer T7 expires.





Operability class:

Related to feature:







Counter ID: 004156 Network element name: MSC O END OF HO TO WCDMA RAN

Version: 4.0 NetAct name: MSC_END_OF_HO_TO_WCDMA_RAN

DN9813636 131



2.158 004157 / MSC O CALL DROP DURING HO TO WCDMA RAN

Description: Number of the end of handover procedures for outgoing (GSM to WCDMA RAN) HO controlled by the MSC.

Updated: - When the GSM timer T3121 expires (the CLEAR_COMMAND message not received).- When the HO is rejected with the cause differing from the cause cip_type_mismatch, or invalid_cell, T7 expiry, no radio resource available or no terrestrial channel avail-able in the target cell.- When the MSC sends a CLEAR_COMMAND message with another reason than handover successful or call control to the BSC.- Internal conflict with the A interface.





Operability class:






Counter ID: 004157 Network element name: MSC O CALL DROP DURING HO TO WCDMA RAN

Version: 4.0 NetAct name: MSC_CALL_DROP_HO_WCDMA_RAN

Description: Number of dropped calls during outgoing (GSM to WCDMA RAN) HOs after HANDOVER COMMAND is received from the MSC.

Updated: When a call is dropped during an external HO after the BSC has received a HANDOVER_COMMAND message. That is,- When either the GSM timer T8 expires- When the MSC sends a CLEAR_COMMAND message to the BSC with other cause than call control or handover successful.



132 DN9813636




2.159 004158 / MSC O TO WCDMA RAN SUCCESS TCH HO

2.160 004159 / SUCCESSFUL HO INTER BAND TCH



Operability class:

Related to feature:







Counter ID: 004158 Network element name: MSC O TO WCDMA RAN SUCCESS TCH HO

Version: 4.0 NetAct name: MSC_TO_WCDMA_RAN_SUCC_TCH_HO

Description: Number of successful outgoing (GSM to WCDMA RAN) HOs controlled by the MSC.

Updated: When the inter-system HO is completed and BSC has received CLEAR_COMMAND from the MSC.





Operability class:

Related to feature:







Counter ID: 004159 Network element name: SUCCESSFUL HO INTER BAND TCH

DN9813636 133



2.161 004160 / SUCCESSFUL HO INTER BTS TYPE TCH

Version: 4.0 NetAct name: SUCCESSFUL_HO_INTER_BAND_TCH

Description: Number of successful and completed TCH-TCH handovers between BTSs of different frequency bands of a segment due to load.

Counter 004135 is updated in the source BTS of the handover.





004135: HO ATTEMPT INTER BAND TCH

Operability class:

Related to feature:

BSS10118: Common BCCH for GSM800/GSM1900







Counter ID: 004160 Network element name: SUCCESSFUL HO INTER BTS TYPE TCH

Version: 4.0 NetAct name: SUCCESFUL_HO_INTER_BTSTYPE_TCH

Description: Number of successful and completed TCH-TCH handovers between dif-ferent BTS types of a segment due to load.






004139: HO ATTEMPT INTER BTS TYPE TCH

Operability class:

Related to feature:



134 DN9813636




2.162 004161 / UNSUCCESSFUL HO INTER BAND TCH

2.163 004162 / UNSUCCESSFUL HO INTER BTS TYPE TCH





Counter ID: 004161 Network element name: UNSUCCESSFUL HO INTER BAND TCH

Version: 4.0 NetAct name: UNSUCCESSFUL_HO_INTER_BAND_TCH

Description: Number of unsuccessful TCH-TCH handovers between BTSs of different frequency bands of a segment due to load.


Updated: At the source BTS.




004135: HO ATTEMPT INTER BAND TCH

Operability class:

Related to feature:








Counter ID: 004162 Network element name: UNSUCCESSFUL HO INTER BTS TYPE TCH

Version: 4.0 NetAct name: UNSUCESFUL_HO_IN_BTS_TYPE_TCH

Description: Number of unsuccessful TCH-TCH handovers between different BTS types of a segment due to load.


Updated: At the source BTS.

DN9813636 135



2.164 004163 / HO ATTEMPT INTER BAND DUE LEVEL




004139: HO ATTEMPT INTER BTS TYPE TCH

Operability class:

Related to feature:







Counter ID: 004163 Network element name: HO ATTEMPT INTER BAND DUE LEVEL

Version: 4.0 NetAct name: HO_ATTEMPT_INTERBAND_DUE_LEVEL

Description: Number of attempts to perform a TCH-TCH handover from non-BCCH layer between BTSs on different frequency bands of a segment due to weak downlink signal level.

Success of the attempts can be seen on BSC level in counter 051135.

Updated: At the source BTS whenever a handover is initiated to move a call to another band of the segment due to weak downlink signal level. PGSM 900 and EGSM 900 are regarded here as different bands.




051135: INTRA INTER BAND TCH HANDOVER

Operability class:

Related to feature:








136 DN9813636




2.165 004164 / UNSUCC HO INTER BAND DUE LEVEL

2.166 004165 / SUCC HO INTER BAND DUE LEVEL

Counter ID: 004164 Network element name: UNSUCC HO INTER BAND DUE LEVEL

Version: 4.0 NetAct name: UNSUCC_HO_INTER_BAND_DUE_LEVEL

Description: Number of unsuccessful attempts to perform a TCH-TCH handover from non-BCCH layer between BTSs on different frequency bands of a segment due to weak downlink signal level. Counter 004163 is updated in the source BTS.

Updated: At the source BTS when a handover to move a call to another band of the segment due to weak downlink signal level fails. PGSM 900 and EGSM 900 are regarded here as different bands.




004169: INTER SEGMENT SUCCESS TCH HO BETWEEN BTS TYPES

Operability class:

Related to feature:








Counter ID: 004165 Network element name: SUCC HO INTER BAND DUE LEVEL

Version: 4.0 NetAct name: SUCC_HO_INTER_BAND_DUE_LEVEL

Description: Number of successful attempts to perform a TCH-TCH handover from non-BCCH layer between BTSs on different frequency bands of a segment due to weak downlink signal level. Counter 004163 is updated in the source BTS.

Updated: At the target BTS when a handover to move a call to another band of the segment due to weak downlink signal level succeeds. PGSM 900 and EGSM 900 are regarded here as different bands.



DN9813636 137



2.167 004166 / INTER SEGMENT SUCCESS SDCCH HO BETWEEN BANDS


004169: INTER SEGMENT SUCCESS TCH HO BETWEEN BTS TYPES

Operability class:

Related to feature:








Counter ID: 004166 Network element name: INTER SEGMENT SUCCESS SDCCH HO BETWEEN BANDS

Version: 4.0 NetAct name: IN_SEG_SUCC_SDCCH_HO_BTW_BANDS

Description: Number of completed and successful SDCCH-SDCCH handovers between two BTSs on different frequency bands between two segments.

Counters 004058 and 004066 are updated along with this counter.





004058: BSC I SDCCH

004066: BSC O SDCCH

Operability class:

Related to feature:








138 DN9813636




2.168 004167 / INTER SEGMENT SUCCESS SDCCH HO BETWEEN BTS TYPES

2.169 004168 / INTER SEGMENT SUCCESS TCH HO BETWEEN BANDS

Counter ID: 004167 Network element name: INTER SEGMENT SUCCESS SDCCH HO BETWEEN BTS TYPES

Version: 4.0 NetAct name: SEG_SUCC_SDCCH_HO_BTW_BTS_TYPE

Description: Number of completed and successful SDCCH-SDCCH handovers between two different types of BTSs between two segments.






004058: BSC I SDCCH

004066: BSC O SDCCH

Operability class:

Related to feature:







Counter ID: 004168 Network element name: INTER SEGMENT SUCCESS TCH HO BETWEEN BANDS

Version: 4.0 NetAct name: SEG_SUCCESS_TCH_HO_BTW_BAND

Description: Number of completed and successful TCH-TCH handovers between two BTSs on different frequency bands between two segments.





DN9813636 139



2.170 004169 / INTER SEGMENT SUCCESS TCH HO BETWEEN BTS TYPES




Operability class:

Related to feature:








Counter ID: 004169 Network element name: INTER SEGMENT SUCCESS TCH HO BETWEEN BTS TYPES

Version: 4.0 NetAct name: SEG_SUCC_TCH_HO_BTW_BTS_TYPE

Description: Number of completed and successful TCH-TCH handovers between two different types of BTSs between two segments.








Operability class:

Related to feature:







140 DN9813636




2.171 004170 / HO CAUSE DUE TO POOL SWITCHING

Counter ID: 004170 Network element name: HO CAUSE DUE TO POOL SWITCHING

Version: 4.0 NetAct name: HO_CAUSE_DUE_POOL_SWITCHING

Description: The counter records the occurrence of the root causes of the external handover before A interface pool switching. The counter records only the external handovers for which A interface pool switching is required.The causes of the original handover can be checked with a bit mask table.

DN9813636 141



Updated: When an external handover is requested and A interface pool switching is required. The bit in the counter (bit mask) is set according to the handover root cause. The related bit is set only once if a handover is requested with the same root cause several times during the measurement period. Counter bit mask: OK CI ratio 00000000000000000000000000000001Bad CI ratio 00000000000000000000000000000010Slow moving MS 00000000000000000000000000000100Speed detection slow moving MS 00000000000000000000000000001000Speed detection fast moving MS 00000000000000000000000000010000Enhanced rapid field drop 00000000000000000000000000100000Traffic reason handover 00000000000000000000000100000000GPRS territory upgrade 00000000000000000000001000000000HSCSD upgrade 00000000000000000000010000000000AMR HR 00000000000000000000100000000000AMR FR 00000000000000000001000000000000Interband 00000000000000000010000000000000Inter-BTS 00000000000000000100000000000000Interband due level 00000000000000001000000000000000Uplink quality 00000000000000010000000000000000High interference on uplink 00000000000000100000000000000000Uplink strength 00000000000001000000000000000000Downlink quality 00000000000010000000000000000000High interference on downlink 00000000000100000000000000000000Downlink strength 00000000001000000000000000000000Distance 00000000010000000000000000000000Forced handover 00000000100000000000000000000000Power budget handover 00000010000000000000000000000000Umbrella handover 00000100000000000000000000000000Directed retry 00001000000000000000000000000000Intelligent directed retry 00010000000000000000000000000000Rapid field drop 01000000000000000000000000000000Low distance 10000000000000000000000000000000

Example: Value 11000000000000011000000000000011(BIN) tells that the handover causes were: Low distance, Rapid field drop, Uplink quality, Interband due level, OK CI ratio and Bad CI ratio.


Logical type: Variable Trigger type: Event Sampling interval:



004099: HO ATT DUE SWITCH CIRC POOL

Operability class:



142 DN9813636




2.172 004171 / AMR UNPACKING HO ATTEMPT DUE TO RX LEVEL

2.173 004172 / MSC I IURG TCH HO ATTEMPT



Used from release: S11.5 Definition updated in release:S12 (Name changed)

Counter ID: 004171 Network element name: AMR UNPACKING HO ATTEMPT DUE TO RX LEVEL

Version: 4.1 NetAct name: AMR_UNP_HO_ATT_DUE_TO_RX_LEV

Description: Number of AMR unpacking handover attempts due to DL or UL RX level.

Updated: When AMR unpacking handover is attempted due to DL or UL RX level being equal to or smaller than user given RX level threshold.




Operability class:

Related to feature:

BSS21483: Improved AMR packing and unpacking





Used from release: S10.5 Definition updated in release:S13, S15 Name changed

Counter ID: 004172 Network element name: MSC I IURG TCH HO ATTEMPT

Version: 4.1 NetAct name: MSC_I_IURG_TCH_HO_ATTEMPT

Description: Number of Iur-g enhanced relocation procedure related handover attempts

Updated: When enhanced relocation procedure related handover is attempted from 3G to 2G (BSC receives Handover Request including D-RNTI from MSC)




Operability class:

DN9813636 143



2.174 004173 / MSC I IURG TCH HO SUCCESS

2.175 004174 / MSC I HO FROM INTER PLMN INTRA GSM ATT

Related to feature:

BSS21528: ISHO acceleration via Iur-g





Used from release: S10.5 Definition updated in release:S15 (name changed)

Counter ID: 004173 Network element name: MSC I IURG TCH HO SUCCESS

Version: 4.1 NetAct name: MSC_I_IURG_TCH_HO_SUCCESS

Description: Number of successful Iur-g enhanced relocation procedure related han-dovers

Updated: When enhanced relocation procedure related handover is successfully completed (BSC sends Handover Complete to MSC)




Operability class:

Related to feature:







Counter ID: 004174 Network element name: MSC I HO FROM INTER PLMN INTRA GSM ATT

Version: 4.0 NetAct name: MSC_I_HO_INT_PLMN_INT_GSM_ATT

Description: Number of the incoming inter-PLMN intra-GSM circuit switched handover attempts.

Updated: When the inter-PLMN HO attempt is started.




144 DN9813636




2.176 004175 / MSC I HO FROM INTER PLMN INTRA GSM SUCC

2.177 004176 / MSC I HO FROM INTER PLMN INTRA GSM FAIL

Operability class:

Related to feature:

BSS11070: Support for Cell Global Identity






Counter ID: 004175 Network element name: MSC I HO FROM INTER PLMN INTRA GSM SUCC

Version: 4.0 NetAct name: MSC_I_HO_INT_PLMN_INT_GSM_SUCC

Description: Number of the successful incoming inter-PLMN intra-GSM circuit switched handovers.

Updated: When the inter-PLMN HO is successfully completed.




Operability class:

Related to feature:







Counter ID: 004176 Network element name: MSC I HO FROM INTER PLMN INTRA GSM FAIL

Version: 4.0 NetAct name: MSC_I_HO_INT_PLMN_INT_GSM_FAIL

Description: Number of the failed incoming inter-PLMN intra-GSM circuit switched handovers.

Updated: When the inter-PLMN HO ends unsuccessfully.


DN9813636 145



2.178 004177 / MSC O HO FROM INTER PLMN INTRA GSM ATT

2.179 004178 / MSC O HO FROM INTER PLMN INTRA GSM SUCC



Operability class:

Related to feature:







Counter ID: 004177 Network element name: MSC O HO FROM INTER PLMN INTRA GSM ATT

Version: 4.0 NetAct name: MSC_O_HO_INT_PLMN_INT_GSM_ATT

Description: Number of the outgoing inter-PLMN intra-GSM circuit switched handover attempts.

Updated: The HANDOVER_REQUIRED message is sent to the MSC. When the HO attempt is started.




Operability class:

Related to feature:







Counter ID: 004178 Network element name: MSC O HO FROM INTER PLMN INTRA GSM SUCC

Version: 4.0 NetAct name: MSC_O_HO_INT_PLMN_INT_GSM_SUCC

Description: Number of the successful outgoing inter-PLMN intra-GSM circuit switched handovers.

146 DN9813636




2.180 004179 / MSC O HO FROM INTER PLMN INTRA GSM FAIL

2.181 004180 / HO ATTEMPT DUE TO ISHO

Updated: When the HO is successfully completed.




Operability class:

Related to feature:







Counter ID: 004179 Network element name: MSC O HO FROM INTER PLMN INTRA GSM FAIL

Version: 4.0 NetAct name: MSC_O_HO_INT_PLMN_INT_GSM_FAIL

Description: Number of the failed outgoing inter-PLMN intra-GSM circuit switched handovers.

Updated: When the HO ends unsuccessfully.




Operability class:

Related to feature:







Counter ID: 004180 Network element name: HO ATTEMPT DUE TO ISHO

Version: 4.0 NetAct name: HO_ATTEMPT_DUE_TO_ISHO

DN9813636 147



2.182 004181 / HO ATTEMPT DUE TO INTER SYSTEM DIRECT ACCESS

Description: Number of attempts to perform a TCH-TCH handover from the GSM to the WCDMA RAN.

The success of the attempts can be seen on the BSC level in counter 051152 (EXT OUT ISHO) of the BSC Level Clear Code (PM) Measurement.

Updated: At the source BTS when a handover is started to the WCDMA RAN.




051152: EXT OUT ISHO

Operability class:

Related to feature:

BSS11107: GSM-WCDMA Interworking Enhancements






Counter ID: 004181 Network element name: HO ATTEMPT DUE TO INTER SYSTEM DIRECT ACCESS

Version: 4.0 NetAct name: HO_ATT_DUE_INTERSYS_DIRECT_ACC

Description: Number of attempts to perform an SDCCH-TCH handover from the GSM to the WCDMA RAN due to Direct Access.

The success of the attempts can be seen on the BSC level in counter 051154 (EXT OUT INTER SYSTEM DIRECT ACCESS) of the BSC Level Clear Code (PM) Mea-surement.

Updated: At the source BTS when a handover is started due to Direct Access to the WCDMA RAN.




051154: EXT OUT INTER SYSTEM DIRECT ACCESS

Operability class:

Related to feature:



148 DN9813636




2.183 004182 / MSC O SDCCH TCH HO TO WCDMA RAN ATTEMPT

2.184 004183 / MSC O SDCCH TCH TO WCDMA RAN SUCCESS HO





Counter ID: 004182 Network element name: MSC O SDCCH TCH HO TO WCDMA RAN ATTEMPT

Version: 4.0 NetAct name: MSCO_SDCCH_TCH_HO_WCDMARAN_ATT

Description: Number of attempts of outgoing SDCCH-TCH handovers from the GSM to the WCDMA RAN controlled by the MSC.

The success of the attempts can be seen in counter 004183 of the Handover Mea-surement.

Updated: At the source BTS when an SDCCH-TCH handover is started from the GSM to the WCDMA RAN.




004183: MSC O SDCCH TCH TO WCDMA RAN SUCCESS HO

Operability class:

Related to feature:







Counter ID: 004183 Network element name: MSC O SDCCH TCH TO WCDMA RAN SUCCESS HO

Version: 4.0 NetAct name: MSCO_SDCCH_TCH_HO_WCDMARAN_SUC

DN9813636 149



2.185 004184 / BSC I INTERNAL HO TO EXTERNAL

Description: Number of successful outgoing SDCCH-TCH handovers from the GSM to the WCDMA RAN controlled by the MSC.

The attempts can be seen in counter 004182 of the Handover Measurement.

Updated: At the source BTS when an SDCCH-TCH handover from the GSM to the WCDMA RAN is completed.




004182: MSC O SDCCH TCH HO TO WCDMA RAN ATTEMPT

Operability class:

Related to feature:







Counter ID: 004184 Network element name: BSC I INTERNAL HO TO EXTERNAL

Version: 4.0 NetAct name: BSC_I_INT_HO_TO_EXT

Description: Number of incoming BSC-internal handovers that areaborted and changed to external.

Updated: When an incoming BSC-internal handover is aborted for changing it to external.




Operability class:

Related to feature:

BSS20117: TCSM3i






150 DN9813636




2.186 004185 / BSC O INTERNAL HO TO EXTERNAL

2.187 004186 / MSC I INTERNAL HO TO EXTERNAL

Counter ID: 004185 Network element name: BSC O INTERNAL HO TO EXTERNAL

Version: 4.0 NetAct name: BSC_O_INT_HO_TO_EXT

Description: Number of outgoing BSC-internal handovers that areaborted and changed to external.

Updated: When an outgoing BSC-internal handover is aborted for changing it to exter-nal.




Operability class:

Related to feature:

BSS20117: TCSM3i






Counter ID: 004186 Network element name: MSC I INTERNAL HO TO EXTERNAL

Version: 4.0 NetAct name: MSC_I_INT_HO_TO_EXT

Description: Number of incoming MSC-controlled handovers that were generated from internal handover.

Updated: When an incoming MSC-controlled handover is generated from an internal handover.




Operability class:

Related to feature:

BSS20117: TCSM3i






DN9813636 151



2.188 004187 / MSC O INTERNAL HO TO EXTERNAL

2.189 004188 / INTERNAL INTRA CELL HO TO EXTERNAL

Counter ID: 004187 Network element name: MSC O INTERNAL HO TO EXTERNAL

Version: 4.0 NetAct name: MSC_O_INT_HO_TO_EXT

Description: Number of outgoing MSC-controlled handovers that were generated from internal handover.

Updated: When an outgoing MSC-controlled handover is generated from an internal handover.




Operability class:

Related to feature:

BSS20117: TCSM3i






Counter ID: 004188 Network element name: INTERNAL INTRA CELL HO TO EXTERNAL

Version: 4.0 NetAct name: INTRA_CELL_HO_TO_EXT

Description: Number of internal intra-cell handovers that are aborted and changed to external.

Updated: When an internal intra-cell handover is aborted for changing it to external.




Operability class:

Related to feature:

BSS20117: TCSM3i






152 DN9813636




2.190 004189 / MSC I UNSUCCESSFUL IURG HO DUE HO REQUEST DELAY

2.191 004190 / DTM MS HO ATTEMPTS TO DTM CELL

Counter ID: 004189 Network element name: MSC I UNSUCCESSFUL IURG HO DUE HO REQUEST DELAY

Version: 4.1 NetAct name: MSC_I_UNSUCC_IURG_HO_DUE_DLY

Description: Number of unsuccessful Iur-g enhanced relocation procedure related handover attempts due to delayed Handover Request

Updated: When enhanced relocation procedure related handover is attempted from 3G to 2G (BSC receives Handover Request including D-RNTI from MSC) but target TCH that has been allocated via Enhanced Relocation Resource Request has already been released




Operability class:

Related to feature:







Counter ID: 004190 Network element name: DTM MS HO ATTEMPTS TO DTM CELL

Version: 4.0 NetAct name: DTM_MS_HO_ATT_TO_DTM_CELL

Description: Number of attempts where the handover for a DTM-capable MS in dedi-cated mode is started to the DTM-capable cell.

Updated: When resource for DTM-capable MS is requested from the DTM-capable cell.




Operability class:

Related to feature:

BSS20088: Dual Transfer Mode (DTM)



DN9813636 153



2.192 004191 / DTM MS HO SUCCEEDED TO DTM CELL

2.193 004192 / DTM MS HO ATTEMPTS TO NON DTM CELL




Counter ID: 004191 Network element name: DTM MS HO SUCCEEDED TO DTM CELL

Version: 4.0 NetAct name: DTM_MS_HO_SUCC_TO_DTM_CELL

Description: Number of successful handovers where a DTM-capable MS in dedicated mode is handed over to the DTM-capable cell.

Updated: When a DTM-capable MS is handed over successfully to the DTM-capable cell.




Operability class:

Related to feature:







Counter ID: 004192 Network element name: DTM MS HO ATTEMPTS TO NON DTM CELL

Version: 4.0 NetAct name: DTM_MS_HO_ATT_TO_NON_DTM_CELL

Description: Number of attempts where the handover for a DTM-capable MS in dedi-cated mode is started to the NON-DTM-capable cell.

Updated: When resource for DTM-capable MS is requested from the NON-DTM-capable cell.




Operability class:

154 DN9813636




2.194 004193 / DTM MS HO SUCCEEDED TO NON DTM CELL

2.195 004194 / DTM CALL HO FROM DTM CELL SUCCEEDED

Related to feature:







Counter ID: 004193 Network element name: DTM MS HO SUCCEEDED TO NON DTM CELL

Version: 4.0 NetAct name: DTM_MS_HO_SUCC_TO_NON_DTM_CELL

Description: Number of successful handovers where a DTM-capable MS in dedicated mode is handed to the NON-DTM-capable cell.

Updated: When a DTM-capable MS is handed over successfully to the NON-DTM-capable cell.




Operability class:

Related to feature:







Counter ID: 004194 Network element name: DTM CALL HO FROM DTM CELL SUCCEEDED

Version: 4.0 NetAct name: DTM_CALL_HO_FROM_DTM_CELL

Description: Number of events where an MS that was having a DTM allocation in the source cell is successfully handed over to the cell.

DN9813636 155



2.196 004195 / DTM HO DUE LACK OF RESOURCES

Updated: When a DTM-capable MS is handed over successfully to the cell in a situ-ation where the MS was having a DTM allocation in the source cell. The counter is updated in the target cell after the BSC has sent the HANDOVER PERFORMED or HANDOVER COMPLETE message to the MSC.

See figures: - DTM call; internal inter-cell handover; CS connection power budget - DTM call; internal inter-cell handover; lack of resources in the PS territory




Operability class:

Related to feature:







Counter ID: 004195 Network element name: DTM HO DUE LACK OF RESOURCES

Version: 4.0 NetAct name: DTM_HO_DUE_LACK_OF_RESOURCE

Description: Number of events where the BSC triggers an inter-cell handover proce-dure for a DTM-capable MS due to lack of resources in the source cell.

Updated: When an inter-cell handover procedure is triggered due to lack of suitable radio resources in PS territory, both in the initial DTM allocation and DTM call reallo-cation procedure cases.

The counter is also updated when the inter-cell handover procedure is triggered when the MT DTM call establishment fails or when the Quality Control triggers a cell change for a DTM-related TBF.

See figure:- DTM call; internal inter-cell handover; lack of resources in the PS territory




Operability class:

Related to feature:



156 DN9813636




2.197 004196 / NON DTM BASED ISHO ATTEMPT

2.198 004197 / NON DTM BASED ISHO SUCCESS





Counter ID: 004196 Network element name: NON DTM BASED ISHO ATTEMPT

Version: 4.0 NetAct name: NON_DTM_BASED_ISHO_ATTEMPT

Description: Number of events where an inter-system handover for a WCDMA-capable MS is attempted due to the terminal's inability to have simultaneous CS and PS connections in GSM.

Updated: When inter-system handover resources are requested for a WCDMA-capable MS due to the terminal's inability to have simultaneous CS and PS connec-tions in GSM.




Operability class:

Related to feature:







Counter ID: 004197 Network element name: NON DTM BASED ISHO SUCCESS

Version: 4.0 NetAct name: NON_DTM_BASED_ISHO_SUCCESS

Description: Number of events where an inter-system handover for a WCDMA-capable MS is performed due to the terminal's inability to have simultaneous CS and PS connections in GSM.

Updated: When an inter-system handover is made successfully for a WCDMA-capable MS due to the terminal's inability to have simultaneous CS and PS connec-tions in GSM.



DN9813636 157



2.199 004198 / DTM CALL HO ATTEMPTS TO DTM CELL

2.200 004199 / DTM CALL HO SUCCESS TO DTM CELL


Operability class:

Related to feature:







Counter ID: 004198 Network element name: DTM CALL HO ATTEMPTS TO DTM CELL

Version: 4.0 NetAct name: DTM_CALL_HO_ATT_TO_DTM_CELL

Description: Number of attempts to hand an MS, which is having a DTM call in the source cell, over to the DTM-capable cell.

Updated: When resource for a DTM call is requested from the DTM-capable cell.

See figures: - DTM call; internal inter-cell handover; CS connection power budget- DTM call; internal inter-cell handover; lack of resources in the PS territory - DTM call; external handover, source BSC




Operability class:

Related to feature:







Counter ID: 004199 Network element name: DTM CALL HO SUCCESS TO DTM CELL

Version: 4.0 NetAct name: DTM_CALL_HO_SUCC_TO_DTM_CELL

158 DN9813636




2.201 004200 / DTM CALL HO ATTEMPTS TO NON DTM CELL

Description: Number of events where an MS, which was having a DTM call in the source cell, is successfully handed over to the DTM-capable cell.

Updated: When a DTM call is handed over successfully to the DTM-capable cell.

See figures: - DTM call; internal inter-cell handover; CS connection power budget- DTM call; internal inter-cell handover; lack of resources in the PS territory - DTM call; external handover, source BSC




Operability class:

Related to feature:







Counter ID: 004200 Network element name: DTM CALL HO ATTEMPTS TO NON DTM CELL

Version: 4.0 NetAct name: DTM_CALL_HO_ATT_TO_NON_DTM

Description: Number of attempts to hand an MS, which is having a DTM call in the source cell, over to the NON-DTM-capable cell.

Updated: When resource for a DTM call is requested from the NON-DTM-capable cell.




Operability class:

Related to feature:







DN9813636 159



2.202 004201 / DTM CALL HO SUCCESS TO NON DTM CELL

2.203 004202 / BSC I INTERNAL HO TO EXTERNAL SUCCESS-FUL

Counter ID: 004201 Network element name: DTM CALL HO SUCCESS TO NON DTM CELL

Version: 4.0 NetAct name: DTM_CALL_HO_SUCC_TO_NON_DTM

Description: Number of events where an MS, which was having a DTM call in the source cell, is successfully handed over to the NON-DTM-capable cell.

Updated: When a DTM call is handed over successfully to the NON-DTM-capable cell. Note that the DTM-PS connection is released in the source cell and it cannot be re-established in the NON-DTM-capable target cell until the CS connection is released.




Operability class:

Related to feature:







Counter ID: 004202 Network element name: BSC I INTERNAL HO TO EXTERNAL SUCCESSFUL

Version: 4.0 NetAct name: BSC_I_INT_SUCC_HO_TO_EXT

Description: Number of successful incoming external handovers that originally were BSC-controlled internal inter-cell TCH-TCH handovers but were changed to MSC controlled due to pool switching or avoiding DL muting when speech coding was changed.

Updated: In the target cell when a TCH-TCH handover is completed and the HANDOVER COMPLETED message is sent to the MSC.




Operability class:

160 DN9813636




2.204 004203 / BSC O INTERNAL HO TO EXTERNAL SUCCESS-FUL

2.205 004204 / INTRA CELL TCH HO TO EXTERNAL SUCCESS-FUL

Related to feature:

BSS20999: New Counters for Handover Measurement






Counter ID: 004203 Network element name: BSC O INTERNAL HO TO EXTERNAL SUCCESSFUL

Version: 4.0 NetAct name: BSC_O_SUCC_HO_TO_EXT

Description: Number of successful outgoing external handovers that originally were BSC-controlled internal inter-cell TCH-TCH handovers but were changed to MSC controlled due to pool switching or avoiding DL muting when speech coding was changed.

Updated: In the source cell when a TCH-TCH handover is completed and the CLEAR COMMAND message is received from the MSC.




Operability class:

Related to feature:







Counter ID: 004204 Network element name: INTRA CELL TCH HO TO EXTERNAL SUCCESSFUL

Version: 4.0 NetAct name: INT_SUCC_HO_TO_EXT

DN9813636 161



2.206 004205 / HO AMR FR TO HR SUCCESSFUL

Description: Number of successful incoming external handovers that originally were BSC-controlled internal intra-cell TCH-TCH handovers but were changed to MSC controlled due to pool switching or avoiding DL muting when speech coding was changed.

Updated: In the target cell when a TCH-TCH handover is completed and the HANDOVER COMPLETED message is sent to the MSC.




Operability class:

Related to feature:







Counter ID: 004205 Network element name: HO AMR FR TO HR SUC-CESSFUL

Version: 4.0 NetAct name: HO_SUCC_AMR_FR_TO_HR

Description: Number of successful HOs from AMR FR to AMR HR.

Updated: When a channel rate change HO for an AMR FR call is successful and the HANDOVER PERFORMED message is sent to the MSC.




Operability class:

Related to feature:







162 DN9813636




2.207 004206 / HO AMR HR TO FR SUCCESSFUL

2.208 004207 / MSC I UNSUCCESSFUL HO FROM WCDMA RAN DUE POOL SWITCHING

Counter ID: 004206 Network element name: HO AMR HR TO FR SUC-CESSFUL

Version: 4.0 NetAct name: HO_SUCC_AMR_HR_TO_FR

Description: Number of successful HOs from AMR HR to AMR FR.

Updated: When a channel rate change HO for an AMR HR call is successful and the HANDOVER PERFORMED message is sent to the MSC.




Operability class:

Related to feature:







Counter ID: 004207 Network element name: MSC I UNSUCCESSFUL HO FROM WCDMA RAN DUE POOL SWITCHING

Version: 4.0 NetAct name: MSC_I_WCDMA_UNSUC_POOL_SWITCH

Description: Number of incoming UTRAN to GSM handovers that are unsuccessful due to a wrong A interface circuit type.

Updated: When the HO attempt ends as a result of a TCH allocation attempt which is unsuccessful because of a mismatch between the requested TCH channel type and the A interface circuit type in UTRAN to GSM handover. The cause switch_circuit_pool is sent in the HANDOVER FAILURE message to the A interface.




Operability class:

Related to feature:




DN9813636 163



2.209 004208 / MSC I SUCCESSFUL HO FROM WCDMA RAN POOL SWITCHING

2.210 004209 / IURG HO REQUEST AFTER MS ON TARGET CHANNEL




Counter ID: 004208 Network element name: MSC I SUCCESSFUL HO FROM WCDMA RAN POOL SWITCHING

Version: 4.0 NetAct name: MSC_I_WCDMA_SUCC_POOL_SWITCH

Description: Number of incoming UTRAN to GSM handovers that are successful after circuit pool switching.

Updated: In the target cell when the 3G to 2G handover is completed after circuit pool switching and the HANDOVER COMPLETED message is sent to the MSC.




Operability class:

Related to feature:







Counter ID: 004209 Network element name: IURG HO REQUEST AFTER MS ON TARGET CHANNEL

Version: 4.1 NetAct name: IURG_HO_REQ_AFT_MS_ON_TGT_CH

Description: Number of Iur-g enhanced relocation procedure related handover attempts after mobile has moved to target channel

Updated: When enhanced relocation procedure related handover is attempted from 3G to 2G (Handover Request is received from MSC) after mobile has already moved to target channel (BSC has received Establish Indication from BTS)


164 DN9813636




2.211 004210 / SPARE004210

2.212 004211 / SPARE004211



Operability class:

Related to feature:






Used from release: S12 Definition updated in release:S15 (name changed)

Counter ID: 004210 Network element name: SPARE004210

Version: 4.0 NetAct name: SPARE004210

Description: Reserved for future use.

Updated:




Operability class:









Updated:




Operability class:


DN9813636 165



2.213 004212 / SPARE004212

2.214 004213 / SPARE004213








Updated:




Operability class:









Updated:




Operability class:






166 DN9813636




2.215 004214 / SPARE004214

2.216 004215 / HO ATTEMPT FROM LRTCH TO NORMAL AREA




Updated:




Operability class:






Counter ID: 004215 Network element name: HO ATTEMPT FROM LRTCH TO NORMAL AREA

Version: 3.0 NetAct name: HO_ATT_FROM_LRTCH_TO_NORM

Description: Number of intra-cell handover attempts from the long reach TCH to a normal area.

Updated: When a BSC starts an intra-cell handover attempt from the long reach TCH to a normal area. The intra-cell handover attempt is started right after the incoming external handover to the long reach TCH has been completed (HANDOVER COMPLETE message is sent to the MSC).




Operability class:

Related to feature:

BSS21274: Long Reach TSL (2G BTS)






DN9813636 167



2.217 004216 / HO FROM LRTCH TO NORMAL AREA SUCCESS-FUL

2.218 004217 / HO ATTEMPT FROM LRTCH TO EXTENDED AREA

Counter ID: 004216 Network element name: HO FROM LRTCH TO NORMAL AREA SUCCESSFUL

Version: 3.0 NetAct name: SUCC_HO_FROM_LRTCH_TO_NORM

Description: Number of successful intra-cell handovers from the long reach TCH to a normal area.

Updated: When a handover from the long reach TCH to a normal area is successfully completed (HANDOVER PERFORMED message is sent to the MSC).




Operability class:

Related to feature:







Counter ID: 004217 Network element name: HO ATTEMPT FROM LRTCH TO EXTENDED AREA

Version: 3.0 NetAct name: HO_ATT_FROM_LRTCH_TO_EXT

Description: Number of intra-cell handover attempts from the long reach TCH to an extended area.

Updated: When the BSC starts handover attempts from the long reach TCH to an extended area. The intra-cell handover attempt is started right after the incoming external handover to the long reach TCH has been completed (HANDOVER COMPLETE message is sent to the MSC).




Operability class:

Related to feature:



168 DN9813636




2.219 004218 / HO FROM LRTCH TO EXTENDED AREA SUC-CESSFUL

2.220 004219 / HO ATTEMPT DUE TO IBHO TO GSM





Counter ID: 004218 Network element name: HO FROM LRTCH TO EXTENDED AREA SUCCESSFUL

Version: 3.0 NetAct name: SUCC_HO_FROM_LRTCH_TO_EXT

Description: Number of successful intra-cell handovers from the long reach TCH to an extended area.

Updated: When a handover from the long reach TCH to an extended area is success-fully completed (HANDOVER PERFORMED message is sent to the MSC).




Operability class:

Related to feature:







Counter ID: 004219 Network element name: HO ATTEMPT DUE TO IBHO TO GSM

Version: 3.0 NetAct name: HO_ATT_DUE_TO_IBHO_TO_GSM

Description: Number of IMSI-based HO attempts started due to the cause ibho_to_gsm to a GSM cell.

Updated: When an IMSI-based handover is started to a GSM cell.




Operability class:

DN9813636 169



2.221 004220 / HO ATTEMPT DUE TO IBHO TO UTRAN

2.222 004221 / HO ATTEMPT DUE TO INT HO TO EXT






Counter ID: 004220 Network element name: HO ATTEMPT DUE TO IBHO TO UTRAN

Version: 3.0 NetAct name: HO_ATT_DUE_TO_IBHO_TO_UTRAN

Description: Number of IMSI-based HO attempts started due to the cause ibho_to_utran to a UTRAN cell.

Updated: When an IMSI-based handover is started to a UTRAN cell.




Operability class:






Counter ID: 004221 Network element name: HO ATTEMPT DUE TO INT HO TO EXT

Version: 3.0 NetAct name: HO_ATT_DUE_TO_INT_HO_TO_EXT

Description: Number of HO attempts started due to the cause int_ho_to_ext.

Updated: When an internal handover is changed to an external.




Operability class:




170 DN9813636




2.223 004222 / HO ATTEMPT DUE TO DTM MO CS TO PS

2.224 004223 / HO ATTEMPT DUE TO DTM MT CS TO PS



Counter ID: 004222 Network element name: HO ATTEMPT DUE TO DTM MO CS TO PS

Version: 3.0 NetAct name: HO_ATT_DUE_TO_DTM_MO_CS_TO_PS

Description: Number of HO attempts started due to the cause dtm_mo_cs_to_ps.

Updated: When an internal intra-cell handover from the CS territory to the PS territory is started as part of a mobile-originated DTM call establishment.




Operability class:






Counter ID: 004223 Network element name: HO ATTEMPT DUE TO DTM MT CS TO PS

Version: 3.0 NetAct name: HO_ATT_DUE_TO_DTM_MT_CS_TO_PS

Description: Number of HO attempts started due to the cause dtm_mt_cs_to_ps.

Updated: When an internal intra-cell handover from the CS territory to the PS territory is started as part of a mobile-terminated DTM call establishment.




Operability class:




DN9813636 171



2.225 004224 / HO ATTEMPT DUE TO DTM MT PS TO PS

2.226 004225 / HO ATTEMPT DUE TO DTM PS TO CS



Counter ID: 004224 Network element name: HO ATTEMPT DUE TO DTM MT PS TO PS

Version: 3.0 NetAct name: HO_ATT_DUE_TO_DTM_MT_PS_TO_PS

Description: Number of HO attempts started due to the cause dtm_mt_ps_to_ps.

Updated: When an internal intra-cell handover inside a PS territory is started as part of a PS quality control-initiated DTM call reallocation.




Operability class:






Counter ID: 004225 Network element name: HO ATTEMPT DUE TO DTM PS TO CS

Version: 3.0 NetAct name: HO_ATT_DUE_TO_DTM_PS_TO_CS

Description: Number of HO attempts started due to the cause dtm_ps_to_cs.

Updated: When an internal intra-cell handover from a PS territory to CS territory is started as part of a DTM call release.




Operability class:





172 DN9813636




2.227 004226 / HO ATTEMPT DUE TO DTM DISABLED

2.228 004227 / HO ATTEMPT DUE TO PCU QUAL CONTROL


Counter ID: 004226 Network element name: HO ATTEMPT DUE TO DTM DISABLED

Version: 3.0 NetAct name: HO_ATT_DUE_TO_DTM_DISABLED

Description: Number of HO attempts started due to the cause dtm_disabled.

Updated: When an internal inter-cell handover is started to a CS territory when DTM is deactivated in a segment.




Operability class:






Counter ID: 004227 Network element name: HO ATTEMPT DUE TO PCU QUAL CONTROL

Version: 3.0 NetAct name: HO_ATT_DUE_PCU_QUAL_CONTROL

Description: Number of HO attempts started due to the cause pcu_qual_cntrl.

Updated: When an internal inter-cell handover is started due to quality reasons related to the DTM PS connection.




Operability class:






DN9813636 173



2.229 004228 / HO ATTEMPT DUE TO DTM NO PS RES AVAIL

2.230 004229 / HO ATTEMPT FROM EXTENDED TO SUPER EXTENDED AREA

Counter ID: 004228 Network element name: HO ATTEMPT DUE TO DTM NO PS RES AVAIL

Version: 3.0 NetAct name: HO_ATT_DUE_DTM_NO_PS_RES_AV

Description: Number of HO attempts started due to the non-available PS resources for DTM.

Updated: When an internal inter-cell handover is started due to non-available PS resources for DTM.




Operability class:






Counter ID: 004229 Network element name: HO ATTEMPT FROM EXTENDED TO SUPER EXTENDED AREA

Version: 3.1 NetAct name: HO_ATT_FROM_EXT_TO_SUPER

Description: Number of intra-cell handover attempts from the extended area to the super-extended area.

Updated: When an intra-cell handover from the extended area to the super-extended area is started.




Operability class:

Related to feature:

BSS21277: 105km Extended Cell CS






174 DN9813636




2.231 004230 / HO FROM EXTENDED TO SUPER EXTENDED AREA SUCCESSFUL

2.232 004231 / HO ATTEMPT FROM SUPER EXTENDED TO EXTENDED AREA

Counter ID: 004230 Network element name: HO FROM EXTENDED TO SUPER EXTENDED AREA SUCCESSFUL

Version: 3.1 NetAct name: HO_SUCC_FROM_EXT_TO_SUPER

Description: Number of successful intra-cell handovers from the extended area to the super-extended area.

Updated: When an intra-cell handover attempt from the extended area to the super-extended area is successfully completed.




Operability class:

Related to feature:







Counter ID: 004231 Network element name: HO ATTEMPT FROM SUPER EXTENDED TO EXTENDED AREA

Version: 3.1 NetAct name: HO_ATT_FROM_SUPER_TO_EXT

Description: Number of intra-cell handover attempts from the super-extended area to the extended area.

Updated: When an intra-cell handover from the super-extended area to the extended area is started.




Operability class:

Related to feature:





DN9813636 175



2.233 004232 / HO FROM SUPER EXTENDED TO EXTENDED AREA SUCCESSFUL

2.234 004233 / HO ATTEMPT FROM LRTCH TO SUPER EXTENDED AREA



Counter ID: 004232 Network element name: HO FROM SUPER EXTENDED TO EXTENDED AREA SUCCESSFUL

Version: 3.1 NetAct name: HO_SUCC_FROM_SUPER_TO_EXT

Description: Number of successful intra-cell handovers from the super-extended area to the extended area.

Updated: When an intra-cell handover attempt from the super-extended area to the extended area is successfully completed.




Operability class:

Related to feature:







Counter ID: 004233 Network element name: HO ATTEMPT FROM LRTCH TO SUPER EXTENDED AREA

Version: 3.1 NetAct name: HO_ATT_FROM_LRTCH_TO_SUPER

Description: Number of intra-cell handover attempts from Long Reach TCH to the super-extended area.

Updated: When an intra-cell handover from Long Reach TCH to the super-extended area is started.




Operability class:

176 DN9813636




2.235 004234 / HO FROM LRTCH TO SUPER EXTENDED AREA SUCCESSFUL

2.236 004235 / HO ATTEMPT FROM AMR HR TO DHR

Related to feature:







Counter ID: 004234 Network element name: HO FROM LRTCH TO SUPER EXTENDED AREA SUCCESSFUL

Version: 3.1 NetAct name: HO_SUCC_FROM_LRTCH_TO_SUPER

Description: Number of successful intra-cell handovers from Long Reach TCH to the super-extended area.

Updated: When an intra-cell handover attempt from Long Reach TCH to the super-extended area is successfully completed.




Operability class:

Related to feature:







Counter ID: 004235 Network element name: HO ATTEMPT FROM AMR HR TO DHR

Version: 1.0 NetAct name: HO_ATTEMPT_FROM_AMR_HR_TO_DHR

Description: Number of HO attempts from an AMR HR TCH to a double half rate TCH.

Updated: When a double half rate multiplexing HO attempt for an AMR HR call is started.



DN9813636 177



2.237 004236 / HO ATTEMPT FROM AMR FR TO DHR

2.238 004237 / HO FROM AMR HR TO DHR SUCCESSFUL


Operability class:

Related to feature:

BSS21309: OSC Half Rate with SAIC MS






Counter ID: 004236 Network element name: HO ATTEMPT FROM AMR FR TO DHR

Version: 1.0 NetAct name: HO_ATTEMPT_FROM_AMR_FR_TO_DHR

Description: Number of HO attempts from an AMR FR TCH to a double half rate TCH.

Updated: When a double half rate multiplexing HO attempt for an AMR FR call is started.




Operability class:

Related to feature:







Counter ID: 004237 Network element name: HO FROM AMR HR TO DHR SUCCESSFUL

Version: 1.0 NetAct name: HO_FROM_AMR_HR_TO_DHR_SUCC

Description: Number of successful HOs from an AMR HR TCH to a double half rate TCH.

Updated: When a HO from an AMR HR TCH to a double half rate TCH has been com-pleted.

178 DN9813636




2.239 004238 / HO FROM AMR FR TO DHR SUCCESSFUL

2.240 004239 / INT CELL UNSUCCESS HO TO DHR DUE TO CSDAP MISMATCH




Operability class:

Related to feature:







Counter ID: 004238 Network element name: HO FROM AMR FR TO DHR SUCCESSFUL

Version: 1.0 NetAct name: HO_FROM_AMR_FR_TO_DHR_SUCC

Description: Number of successful HOs from an AMR HR TCH to a double half rate TCH.

Updated: When a HO from an AMR FR to a double half rate TCH has been com-pleted.




Operability class:

Related to feature:







Counter ID: 004239 Network element name: INT CELL UNSUCCESS HO TO DHR DUE TO CSDAP MISMATCH

Version: 1.0 NetAct name: UNSUCC_HO_TO_DHR_DUE_MISMATCH

DN9813636 179



2.241 004240 / HO ATTEMPT FROM DHR DUE TO RX QUALITY

Description: Number of failed HOs to a double half rate TCH due to CSDAP conflict between BSC and BTS.

Updated: When target channel activation fails during a double half rate multiplexing HO with cause code CSDAP error.




Operability class:

Related to feature:







Counter ID: 004240 Network element name: HO ATTEMPT FROM DHR DUE TO RX QUALITY

Version: 1.0 NetAct name: HO_ATT_FROM_DHR_DUE_RX_QUAL

Description: Number of demultiplexing HO attempts starting from a double half rate TCH based on Rx quality.

Updated: When demultiplexing HO attempt for a double half rate call is started based on Rx quality.




Operability class:

Related to feature:







180 DN9813636




2.242 004241 / HO ATTEMPT FROM DHR DUE TO UL RX LEVEL DIFFERENCE

2.243 004242 / HO FROM DHR DUE TO RX QUALITY SUCCESS-FUL

Counter ID: 004241 Network element name: HO ATTEMPT FROM DHR DUE TO UL RX LEVEL DIFFERENCE

Version: 1.0 NetAct name: HO_ATT_FROM_DHR_DUE_RXLEV_DIF

Description: Number of demultiplexing HO attempts starting from a double half rate TCH based on UL Rx level difference between the multiplexed double half rate TCHs.

Updated: When a demultiplexing HO attempt for a double half rate call is started based on UL Rx level difference between the multiplexed double half rate TCHs.




Operability class:

Related to feature:







Counter ID: 004242 Network element name: HO FROM DHR DUE TO RX QUALITY SUCCESSFUL

Version: 1.0 NetAct name: HO_FROM_DHR_DUE_RX_QUAL_SUCC

Description: Number of successful HOs starting from double half rate TCH based on Rx quality.

Updated: When a demultiplexing HO starting from a double half rate TCH based on Rx quality has been completed.




Operability class:

Related to feature:



DN9813636 181



2.244 004243 / HO FROM DHR DUE TO UL RX LEVEL DIFFER-ENCE SUCCESSFUL

2.245 004244 / BSS INTERNAL HANDOVER REQUIRED REQUESTS





Counter ID: 004243 Network element name: HO FROM DHR DUE TO UL RX LEVEL DIFFERENCE SUCCESSFUL

Version: 1.0 NetAct name: HO_FROM_DHR_DUE_RXLEV_SUCC

Description: Number of successful demultiplexing HOs starting from a double half rate TCH based on UL Rx level difference between the multiplexed double half rate TCHs.

Updated: When a demultiplexing HO from a double half rate TCH based on UL Rx level difference between the multiplexed double half rate TCHs has been completed.




Operability class:

Related to feature:







Counter ID: 004244 Network element name: BSS INTERNAL HANDOVER REQUIRED REQUESTS

Version: 1.0 NetAct name: BSS_INT_HO_REQ_REQUESTS

Description: Number of BSS Internal Handover Required requests when IP based user plane is supported in the A interface

Updated: This is updated when BSSMAP Internal Handover Required message is sent to MSS from BSC.See figures:- BSS Internal Handover with MSC Support - Local Handover- BSS Internal Handover with MSC Support - Distant Handover

182 DN9813636




2.246 004245 / BSS INTERNAL HANDOVER COMMANDS

2.247 004246 / BSS INTERNAL HANDOVER FAILURES




Operability class:

Related to feature:

BSS21341: A over IP, Transcoder in BSS






Counter ID: 004245 Network element name: BSS INTERNAL HANDOVER COMMANDS

Version: 1.0 NetAct name: BSS_INT_HO_COMMANDS

Description: Number of BSS Internal Handover Commands received from the MSC when IP based user plane is supported in the A interface

Updated: This is updated when BSSMAP Internal Handover Command message is received on BSC from MSS.See figures:- BSS Internal Handover with MSC Support - Local Handover- BSS Internal Handover with MSC Support - Distant Handover




Operability class:

Related to feature:







Counter ID: 004246 Network element name: BSS INTERNAL HANDOVER FAILURES

Version: 1.0 NetAct name: BSS_INT_HO_FAILURES

DN9813636 183



2.248 004247 / BSS INTERNAL HANDOVER REQUIRED REJEC-TIONS

Description: Number of BSS Internal Handover failures sent by the BSC when IP based user plane is supported in the A interface. (Count of BSSAP Handover Failure messages related to the Internal Handover execution procedure)

Updated: This is updated when BSC sends BSSMAP Handover Failed message to MSC




Operability class:

Related to feature:







Counter ID: 004247 Network element name: BSS INTERNAL HANDOVER REQUIRED REJECTIONS

Version: 1.0 NetAct name: BSS_INT_HO_REQ_REJECTIONS

Description: Number of BSS Internal Handover Required Rejections received from the MSC when IP based user plane is supported in the A interface

Updated: This is updated when Internal Handover Required Reject is sent from MSS to BSC




Operability class:

Related to feature:







184 DN9813636




2.249 004248 / BSS INTERNAL HANDOVER SUCCESSFUL

2.250 004249 / BSS INTERNAL HANDOVER ENQUIRY

Counter ID: 004248 Network element name: BSS INTERNAL HANDOVER SUCCESSFUL

Version: 1.0 NetAct name: BSS_INT_HO_SUCCESSFUL

Description: Number of successful BSS Internal handover procedures when IP based user plane is supported in the A interface. (Count of Handover Complete messages related to the internal handover execution procedure)

Updated: This is updated when BSC sends BSSMAP Handover Complete message to MSS.See figures:- BSS Internal Handover with MSC Support - Local Handover- BSS Internal Handover with MSC Support - Distant Handover




Operability class:

Related to feature:







Counter ID: 004249 Network element name: BSS INTERNAL HANDOVER ENQUIRY

Version: 1.0 NetAct name: BSS_INT_HO_ENQUIRY

Description: Number of BSS Internal Handover Enquiry messages received from the MSC when IP based user plane is supported in the A interface

Updated: This is updated when BSC receives BSSMAP Internal Handover Enquiry message from MSS.See figures:- BSS Internal Handover with MSC Support - Distant Handover




Operability class:

DN9813636 185



2.251 004250 / BSS INTERNAL HANDOVER ENQUIRY REJEC-TIONS

2.252 004251 / HO ATTEMPT FROM DHR DUE TO RX LEVEL

Related to feature:







Counter ID: 004250 Network element name: BSS INTERNAL HANDOVER ENQUIRY REJECTIONS

Version: 1.0 NetAct name: BSS_INT_HO_ENQUIRY_REJ

Description: Number of BSS Internal Handover Enquiry rejections when IP based user plane is supported in the A interface (Count of Handover Failure messages related to the Internal Handover Enquiry)

Updated: This is updated when BSC sends BSSMAP Handover Failure with cause set as "Internal Handover Enquiry Reject" to MSS




Operability class:

Related to feature:







Counter ID: 004251 Network element name: HO ATTEMPT FROM DHR DUE TO RX LEVEL

Version: 1.0 NetAct name: HO_ATT_FROM_DHR_DUE_RX_LEV

Description: Number of demultiplexing handover attempts starting from a double half rate TCH based on Rx level.

Updated: When demultiplexing handover attempt for a double half rate call is started based on Rx level of the call.


186 DN9813636




2.253 004252 / HO FROM DHR DUE TO RX LEVEL SUCCESSFUL

2.254 004253 / SPARE004253



Operability class:

Related to feature:







Counter ID: 004252 Network element name: HO FROM DHR DUE TO RX LEVEL SUCCESSFUL

Version: 1.0 NetAct name: HO_FROM_DHR_DUE_RX_LEV_SUCC

Description: Number of successful handovers starting from double half rate TCH based on Rx level.

Updated: When a demultiplexing handover starting from a double half rate TCH based on Rx level of the call has been completed.




Operability class:

Related to feature:










Updated:



DN9813636 187



2.255 004254 / SPARE004254

2.256 004255 / SPARE004255


Operability class:









Updated:




Operability class:









Updated:




Operability class:




188 DN9813636




2.257 004256 / SPARE004256

2.258 004257 / SPARE004257






Updated:




Operability class:









Updated:




Operability class:






DN9813636 189



2.259 004258 / SPARE004258

2.260 004259 / HO ATTEMPT FROM AMR FR TO DFR IN 8K TRAU MODE




Updated:




Operability class:






Counter ID: 004259 Network element name: HO ATTEMPT FROM AMR FR TO DFR IN 8K TRAU MODE

Version: 1.0 NetAct name: HO_ATT_AMR_FR_DFR_IN_8K_TRAU

Description: Number of handover attempts from an AMR FR TCH to a double full rate TCH in 8kbit/s TRAU mode.

Updated: When a double full rate multiplexing handover attempt to 8kbit/s TRAU mode for an AMR FR call is started. General counter HO ATTEMPT FROM AMR FR TO DFR is updated at the same time with this counter.




Operability class:

Related to feature:

BSS21325: 8K TRAU FOR OSC AMR FR






190 DN9813636




2.261 004260 / HO FROM AMR FR TO DFR IN 8K TRAU MODE SUCCESSFUL

2.262 004261 / HO ATTEMPT FROM AMR FR TO DFR

Counter ID: 004260 Network element name: HO FROM AMR FR TO DFR IN 8K TRAU MODE SUCCESSFUL

Version: 1.0 NetAct name: HO_SUCC_AMR_FR_DFR_IN_8K_TRAU

Description: Number of successful handovers from an AMR FR TCH to a double full rate TCH in 8kbit/s TRAU mode.

Updated: When a handover from an AMR FR TCH to a double full rate TCH in 8kbit/s TRAU mode has been completed. General counter HO FROM AMR FR TO DFR SUCCESSFUL is updated at the same time with this counter.




Operability class:

Related to feature:

BSS21325: 8K TRAU FOR OSC AMR FR






Counter ID: 004261 Network element name: HO ATTEMPT FROM AMR FR TO DFR

Version: 1.0 NetAct name: HO_ATTEMPT_FROM_AMR_FR_TO_DFR

Description: Number of handover attempts from an AMR FR TCH to a double full rate TCH.

Updated: When a double full rate multiplexing handover attempt for an AMR FR call is started.




Operability class:

Related to feature:

BSS21534: OSC Full Rate with SAIC MS



DN9813636 191



2.263 004262 / HO FROM AMR FR TO DFR SUCCESSFUL

2.264 004263 / INT CELL UNSUCCESS HO TO DFR DUE TO CSDAP MISMATCH




Counter ID: 004262 Network element name: HO FROM AMR FR TO DFR SUCCESSFUL

Version: 1.0 NetAct name: HO_FROM_AMR_FR_TO_DFR_SUCC

Description: Number of successful handovers from an AMR FR TCH to a double full rate TCH.

Updated: When a handover from an AMR FR TCH to a double full rate TCH has been completed.




Operability class:

Related to feature:







Counter ID: 004263 Network element name: INT CELL UNSUCCESS HO TO DFR DUE TO CSDAP MISMATCH

Version: 1.0 NetAct name: UNSUCC_HO_TO_DFR_DUE_MISMATCH

Description: Number of failed handovers to a double full rate TCH due to CSDAP conflict between BSC and BTS.

Updated: When target channel activation fails during a double full rate multiplexing handover with cause code CSDAP error.




Operability class:

192 DN9813636




2.265 004264 / HO ATTEMPT FROM DFR DUE TO RX QUALITY

2.266 004265 / HO ATTEMPT FROM DFR DUE TO UL RX LEVEL DIFFERENCE

Related to feature:







Counter ID: 004264 Network element name: HO ATTEMPT FROM DFR DUE TO RX QUALITY

Version: 1.0 NetAct name: HO_ATT_FROM_DFR_RXQUAL

Description: Number of demultiplexing handover attempts starting from a double full rate TCH based on Rx quality.

Updated: When demultiplexing handover attempt for a double full rate call is started based on Rx quality.




Operability class:

Related to feature:







Counter ID: 004265 Network element name: HO ATTEMPT FROM DFR DUE TO UL RX LEVEL DIFFERENCE

Version: 1.0 NetAct name: HO_ATT_FROM_DFR_RXLVL_DIFF

Description: Number of demultiplexing handover attempts starting from a double full rate TCH based on UL Rx level difference between the multiplexed double full rate TCHs.

Updated: When a demultiplexing handover attempt for a double full rate call is started based on UL Rx level difference between the multiplexed double full rate TCHs.


DN9813636 193



2.267 004266 / HO ATTEMPT FROM DFR DUE TO RX LEVEL

2.268 004267 / HO FROM DFR DUE TO RX QUALITY SUCCESS-FUL



Operability class:

Related to feature:







Counter ID: 004266 Network element name: HO ATTEMPT FROM DFR DUE TO RX LEVEL

Version: 1.0 NetAct name: HO_ATT_FROM_DFR_RXLEVEL

Description: Number of demultiplexing handover attempts starting from a double full rate TCH based on Rx level.

Updated: When demultiplexing handover attempt for a double full rate call is started based on Rx level of the call.




Operability class:

Related to feature:







Counter ID: 004267 Network element name: HO FROM DFR DUE TO RX QUALITY SUCCESSFUL

Version: 1.0 NetAct name: HO_FROM_DFR_DUE_RXQUAL_SUCC

Description: Number of successful handovers starting from double full rate TCH based on Rx quality.

194 DN9813636




2.269 004268 / HO FROM DFR DUE TO UL RX LEVEL DIFFER-ENCE SUCCESSFUL

Updated: When a demultiplexing handover starting from a double full rate TCH based on Rx quality has been completed.




Operability class:

Related to feature:







Counter ID: 004268 Network element name: HO FROM DFR DUE TO UL RX LEVEL DIFFERENCE SUCCESSFUL

Version: 1.0 NetAct name: HO_FROM_DFR_DUE_RXLEV_DIF_SUC

Description: Number of successful demultiplexing handovers starting from a double full rate TCH based on UL Rx level difference between the multiplexed double full rate TCHs.

Updated: When a demultiplexing handover from a double full rate TCH based on UL Rx level difference between the multiplexed double full rate TCHs has been com-pleted.




Operability class:

Related to feature:







DN9813636 195



2.270 004269 / HO FROM DFR DUE TO RX LEVEL SUCCESSFUL

Counter ID: 004269 Network element name: HO FROM DFR DUE TO RX LEVEL SUCCESSFUL

Version: 1.0 NetAct name: HO_FROM_DFR_DUE_RXLEV_SUCC

Description: Number of successful handovers starting from double full rate TCH based on Rx level.

Updated: When a demultiplexing handover starting from a double full rate TCH based on Rx level of the call has been completed.




Operability class:

Related to feature:







196 DN9813636


Id:0900d805807fc123Confidential

Signalling charts of Handover Measurement

3 Signalling charts of Handover MeasurementThe following figures show the signalling charts of Handover Measurement:

Figure 1 Successful internal intra-cell TCH to TCH handover

Counter 4109 or 4110 is updated only in case of a handover attempt due to a bad Rxlevel on a super-reuse frequency or a good Rxlevel on a regular frequency.

BTS: MSC:MS: BSC:

Cause downlink qualityCause distanceCause high int on uplinkCause high int on downlinkCause ho started by omcCause preemptionCause low distanceCause bad ci ratioCause good ci ratioHo att due bad rxlev on superHo att due good rxlev on reg

Int cell success ho

Cell tch tch

Cell tch tch attempt

Meas report Meas result

Physical context request

Physical context confirm

Channel activation

Channel activation ack

Assignment command

Assignment command

Sabm Establish indication

Ua

Rr

HO performed

Rf channel release

Rf channel release ack

Assignment complete

Assignment complete

Ho att due to GPRS

HO measurement,

4025 or4027 or4029 or4030 or4033 or4086 or4088 or4089 or4090 or4109 or4110 or

4076

4130

New channel reservation and activation

Signalling on old channel

Signalling on new channel

Old channel release

4018

4073

HO decision --> intra-cell HO attempt, old channel

DN9813636 197

4 Handover Measurement Signalling charts of Handover Measurement


Figure 2 Successful internal inter-cell TCH to TCH handover

Counters 4067, 4071, 4014, 4064, 4070 and cause counters are updated in the source cell. Counters 4059, 4063, 4010, 4056 and 4062 are updated in the target cell. If the handover is made from normal to extended area, instead of counter 4027, counter 4103 is updated. If the handover is made from extended to normal area, instead of counter 4088, counter 4104 is updated. Counters 4063, 4071, 4070 and 4062 are updated only if the target cell is non-optimum.

BTS_1:MS: MSC:BTS_2: BSC:

HO performed

Rf channel release


HO commandHO command

Channel activation

HO detectionPhysical info

HO access

Establish indication

Ua

HO complete HO complete

Rr

Sabm

HO measurements, old channel in the old BTS

Cause uplink qualityCause uplink levelCause downlink qualityCause downlink levelCause distanceCause resp to msc invocatCause high int on uplinkCause high int on downlinkCause umbrella hoCause power bugdet hoCause ho started by omcCause preemptionCause field dropCause low distanceCause bad ci ratioCause good ci ratioHo due slow mov msHo due to ms slow speedHo due to ms high speed

4023 or4024 or4025 or4026 or4027 or4028 or4029 or4030 or4031 or4032 or4033 or4086 or4087 or4088 or4089 or4090 or4091 or4105 or4106 or

Bsc o nonopt at

Bsc i nonopt at

Bsc i tch tch at

Bsc o tch tch at

4071

4063

4059

4067

Ho att due erfd 4111


Old channel release in the old BTS

Bsc i nonopt

Bsc i tch tch

Bsc i success ho

Bsc o nonopt

Bsc o tch tch

Bsc o success ho

4062

4056

4010

4070

4064

4014

Signalling on the new

New channel reservation and

Signalling on the old


activation in the new BTS

channel in the old BTS

channel in the new BTS

198 DN9813636




Figure 3 Successful external TCH to TCH handover, source BSC

If the handover is made from normal to extended area, instead of counter 4027, counter 4103 is updated. If the handover is made from extended to normal area, instead of counter 4088, counter 4104 is updated. Counter 4095 is updated only if cause counter 4099 is updated.

BTS: MSC:MS: BSC:

Msc o succ switch circ pool

Msc o succ tch tch ho

Msc o succ ho

Msc o gen ho com msg

Msc o gen ho req msg

Msc o tch tch at

Cause uplink qualityCause uplink levelCause downlink qualityCause downlink levelCause distanceCause resp to msc invocatCause high int on uplinkCause high int on downlinkCause umbrella hoCause power bugdet hoCause ho started by omcCause preemptionCause field dropCause low distanceHo due slow mov msHo att due switch circ poolHo due to ms slow speedHo due to ms high speedHo att due erfd

HO command

Rf channel release


HO required


Clear complete


Clear command

HO measurements, HO decision -->

Channel reservation and activation

4052

4023 or4024 or4025 or4026 or4027 or4028 or4029 or4030 or4031 or4032 or4033 or4086 or4087 or4088 or4091 or4099 or4105 or4106 or4111

4009

4005

Old channel release in the old BSC

4095

4049

4004

external HO attempt

in new (target) BSC, HO command from MSC

DN9813636 199



Figure 4 Successful external TCH to TCH handover, target BSC

Counter 4093 can be updated only if counter 4092 is updated.

BSC:

Msc i succ ho

Msc i succ switch circ pool

Msc i succ tch tch ho

Msc i att switch circ pool

Msc i tch tch ho att

MS: MSC:BTS:

HO request

Channel activation


HO request ack

HO access

HO detection HO detection

Physical info

Sabm


Ua

HO complete

Rr

HO complete

HO completed

4000

4093

4043

Signalling on the new BTS, connection

HO measurements and external

Channel reservation

4092

4046

HO decision done in source BSC, MSC sends HO request

and activation in the new BTS

200 DN9813636




Figure 5 Successful internal intra-cell SDCCH to SDCCH handover

MS: BTS: BSC: MSC:


Cell sdcch attempt

Cause downlink qualityCause distanceCause high int on uplinkCause high int on downlinkCause ho started by omcCause preemptionCause low distanceCause bad ci ratioCause good ci ratio



Channel activation


Assignment command

Assignment command


Ua

Assignment complete

Assignment complete

Rr

HO performed

Cell sdcch

Int cell success ho

Rf channel release


HO measurement,

New channel



Old channel release

4078

4025 or4027 or4029 or4030 or4033 or4086 or4088 or4089 or4090 or

4075

4018


reservation and activation

DN9813636 201



Figure 6 Successful internal inter-cell SDCCH to SDCCH handover

Counters 4069, 4071, 4014, 4066, 4070 and cause counters are updated in the source cell. Counters 4061, 4063, 4010, 4058 and 4062 are updated in the target cell. If the handover is made from normal to extended area, instead of counter 4027, counter 4103 is updated. If the handover is made from extended to normal area, instead of counter 4088, counter 4104 is updated. Counters 4063, 4071, 4070 and 4062 are updated only if the target cell is non-optimum.

MS: BTS_1: BTS_2: BSC: MSC:


Bsc o sdcch at

Bsc i sdcch at

Bsc i nonopt at

Bsc o nonopt at

Channel activation


HO command HO command

HO access HO detection

Physical info


UaHO complete HO complete

Rr HO performed

Bsc o success ho

Bsc o sdcch

Bsc o nonopt

Bsc i success ho

Bsc i sdcch

Bsc i nonopt

Rf channel release


HO measurements,


New channel reservation and

Signalling on the old channel

Signalling on the new channel

4069

4061

4063

4071

4014

4066

4070

4010

4058

4062

Cause uplink qualityCause uplink levelCause downlink qualityCause downlink qualityCause distanceCause resp to msc invocatCause high int on uplinkCause high int on downlinkCause umbrella hoCause power bugdet hoCause ho started by omcCause preemptionCause field dropCause low distanceCause bad ci ratioCause good ci ratioHo due slow mov msHo due to ms slow speedHo due to ms high speedHo att due erfd

4023 or4024 or4025 or4026 or4027 or4028 or4029 or4030 or4031 or4032 or4033 or4086 or4087 or4088 or4089 or4090 or4091 or4105 or4106 or4111


old channel in the old BTS

in the old BTS

in the new BTS

202 DN9813636




Figure 7 Successful external SDCCH to SDCCH handover, source BSC

If the handover is made from normal to extended area, instead of counter 4027, counter 4103 is updated. If the handover is made from extended to normal area, instead of counter 4088, counter 4104 is updated. Counter 4095 is updated only if cause counter 4099 is updated.

BTS: MSC:MS: BSC:

Msc o sdcch

Msc o succ ho



Msc o sdcch at

HO command

Rf channel release


HO required


Clear complete


Clear command


Cause uplink qualityCause uplink levelCause downlink qualityCause downlink qualityCause distanceCause resp to msc invocatCause high int on uplinkCause high int on downlinkCause umbrella hoCause power bugdet hoCause ho started by omcCause preemptionCause field dropCause low distanceHo due slow mov msHo att due switch circ poolHo due to ms slow speedHo due to ms high speedHo att due erfd

4023 or4024 or4025 or4026 or4027 or4028 or4029 or4030 or4031 or4032 or4033 or4086 or4087 or4088 or4091 or4099 or4105 or4106 or4111

4054

Channel reservation and

4051

4004

4009

4005


Msc o succ switch circ pool 4095

external HO attempt

activation in new (target) BSC, HO command from MSC

DN9813636 203



Figure 8 Successful external SDCCH to SDCCH handover, target BSC

Counter 4093 is updated only if counter 4092 is updated.

BSC:

Msc i succ ho

Msc i succ switch circ pool

Msc i sdcch


Msc i sdcch att

MS: MSC:BTS:

HO request

Channel activation


HO request ack

HO access


Physical info

Sabm


Ua

HO complete

Rr

HO complete

HO completed


Channel reservation


4000

4093

4045

4092

4048



204 DN9813636




Figure 9 Internal intra-cell directed retry including BSS6114: TCH assignment to the super-reuse TRX in IUO

BSC:

Int cell success ho

Cell sdcch tch

Cause dir retry

Cell sdcch tch at

MS: MSC:BTS:

Assignment requestPhysical context request


Channel activation



Assignment commandAssignment command

Ua

Rr Assignment complete

Rf channel release


Assignment complete Assignment complete

Queueing indication

Alert Alert

Connect ackConnect ack

Connect Connect



Paging part

Radio access part (on CCCH)

DDCH establishment part

SDCCH signalling part

Cell is congested, no TCH, DR HO begins

Queueing possible and started

Signalling on FACCH - TCH

Signalling on SDCCH

TCH reservation and activation

Physical context information

SDCCH release

Connection

Conversation phase

4018

4074

4079

4077

DN9813636 205



Figure 10 Internal inter-cell directed retry, including BSS6114 TCH assignment to the super-reuse TRX in IUO

Counters 4063, 4071, 4070 and 4062 are updated only if the target cell is non-optimum.

BSC:

Bsc i nonopt

Bsc i sdcch tch

Bsc i success ho

Bsc o nonopt

Bsc o sdcch tch

Bsc o success ho

Bsc o nonopt at

Bsc i nonopt at

Bsc i sdcch tch at

Cause dir retry

Bsc o sdcch tch at

MS: MSC:BTS:



Channel activation




HO access HO detection

Physical info

Ua

Rr Assignment complete

Rf channel release



Queueing indication

Alert Alert


Connect Connect

Paging part




Connection



TCH reservation and activation in new BTS

Signalling on SDCCH in old BTS

Signalling on FACCH - TCH in new BTS

SDCCH release in old BTS

Conversation phase

4062

4057

4010

4070

4065

4014

4071

4063

4060

4079

4068

206 DN9813636




Figure 11 External directed retry, source BSC

BSC:


Msc o sdcch tch

Msc o succ ho


Cause dir retry

Msc o sdcch tch at

MS: MSC:BTS:


HO command

Clear command

Clear complete



Rf channel release


Queueing indication

Ho required

Paging part






TCH reservation and activation in target BSC

HO command from MSC, signalling on SDCCH

Signalling on FACCH - TCH on target BSC

SDCCH release in source BSC

4009

4050

4004

4005

4079

4053

DN9813636 207



Figure 12 External directed retry, target BSC

BSC:

Msc i succ ho

Msc i sdcch tch

Msc i sdcch tch ho att

MS: MSC:BTS:

HO request

Channel activation


HO request ack

HO accessHO detection HO detection

Physical info


Ua

HO complete

Rr

HO complete

HO completed

Alert Alert

Connect Connect


External DR start done in initial BSC, MSC sends ho request

Channel reservation and activation in the new BTS


4000

4044

4047

Conversation phase

208 DN9813636




Figure 13 Unsuccessful internal intra-cell TCH to TCH handover due to a lack of resources

Figure 14 Unsuccessful internal inter-cell TCH to TCH handover due to a lack of resources

Counters 4071 and 4072 are updated in the source cell. Counters 4063 and 4011 are updated in the target cell. Counters 4063 and 4071 are updated only if the target cell is non-optimum.

BTS: MSC:MS: BSC:

Int cell unsucc ho due lack 4019

Meas report

Meas result



HO measurement,

Normal HO counters updated, see figure 1



HO ends and signalling

No free channel available


continues on old channel


Bsc o nonopt at

Bsc o fail lack

Bsc i unsucc ho due lack

Bsc i nonopt at

Meas report

Meas result



New channel reservation

No free channel available


4071

4072

4011

4063

Internal inter-cell HO, old channel in old BTS


continues in the old channel

DN9813636 209



Figure 15 Unsuccessful external TCH to TCH handover due to a lack of resources, source BSC

Figure 16 Unsuccessful external TCH to TCH handover due to a lack of resources, target BSC

BTS: MSC:MS: BSC:


Msc o fail lack

HO required reject

HO required

Meas report

Meas result



Unsuccessful channel reservation


4005

4055

external HO attempt

in new (target) BSC

continuous in the old channel

due lack of resources

BSC:

Msc i unsucc ho due lack


MS: MSC:BTS:

HO request

HO failure


Channel reservation

No free channel


4001

4046



continuous on the old channel in the old BSC

210 DN9813636




Figure 17 Unsuccessful internal intra-cell TCH to TCH handover because a handover is not allowed at this phase of the call

BTS: MSC:MS: BSC:

Int cell ho not allowed

Meas report

Meas result



Channel activation


Rf channel release


HO measurement, HO decision -->



Signalling on old channel,


Signalling continuous on old channel

4036

intra-cell HO attempt, old channel

HO not allowed at this phase of call

DN9813636 211



Figure 18 Unsuccessful internal inter-cell TCH to TCH handover because a handover is not allowed at this phase of the call

Counter 4038 is updated in the source cell. Counter 4081 is updated in the target cell.

Figure 19 Unsuccessful external TCH to TCH handover because a handover is not allowed, source BSC


Bsc o ho not allowed

Bsc i end of ho

Rf channel release


Meas reportMeas result

Channel activation




New channel reservation and activation in the new BTS

Signalling on the old channel in the old BTS, HO not allowed

Signalling on the new channel in the new BTS

Signalling continuous on the old channel

4038

4081

BTS: MSC:MS: BSC:

Msc o ho not allowed

Meas report

Meas result

HO measurements, HO decision --> external HO attempt


HO not allowed


4037

212 DN9813636




Figure 20 Unsuccessful internal intra-cell TCH to TCH handover due to a failure in the activation of a new channel

Figure 21 Unsuccessful internal inter-cell TCH to TCH handover due to a failure in the activation of a new channel

Counter 4016 is updated in the source cell. Counter 4013 is updated in the target cell.

BTS: MSC:MS: BSC:

Int cell unsucc ho due bss probl 4021

Meas report

Meas result



Channel activation

Channel activation nack

Rf channel release



Normal HO counters updated,



Channel activation fails


see figure 1


Bsc o end of ho

Bsc i unsucc ho due bss probl

Meas report

Meas result





Signalling continuous on the old channel

Rf channel release


Channel activation


4016

4013

DN9813636 213



Figure 22 Unsuccessful external TCH to TCH handover due to a failure in the activa-tion of a new channel, target BSC

BSC:



Msc i unsucc ho due bss probl

MS: MSC:BTS:

HO request

HO failure

Channel activation


Rf channel release





HO ends and signalling continuous

4092

4046

4003



on the old channel in the old BSC

214 DN9813636




Figure 23 Unsuccessful internal intra-cell TCH to TCH handover due to losing the MS during handover. The GSM timer T3107 expires.

BTS: MSC:MS: BSC:

Cell drop calls

Int cell unsucc ho due move

Timer T3107 expires

Start timer T3107

Meas report

Meas result



Channel activation


Assignment command

Assignment command

Rf channel release


Rf channel release





MS is lost, Timer T3107 Expires

4085

4020

New channel release

Old channel release



see figure 1

DN9813636 215



Figure 24 Unsuccessful internal inter-cell TCH to TCH handover due to losing the MS during handover. The GSM timer T3103 expires.

Counters 4016 and 4084 are updated in the source cell. Counters 4012 and 4083 are updated in the target cell. Signalling can also be partly missing, depending on where the failure takes place.


Timer T3103 expires

Start timer T3103

Bsc i drop calls

Bsc i unsucc ho due conn

Bsc o drop calls

Bsc o end of ho

Rf channel release


Meas report

Meas result

HO command

HO command

Channel activation


HO detection

Physical info

HO access

Rf channel release





Signalling on the old channel in the old BTS


4083

4012

4084

4016

New channel release


216 DN9813636




Figure 25 Unsuccessful internal intra-cell TCH to TCH handover due to MS returning to the old channel

Signalling can be also partly missing, depending on where the failure happens.

BTS: MSC:MS: BSC:

Int cell unsucc ho due return 4022

Meas report

Meas result



Channel activation


Assignment command

Assignment command

Sabm


Ua

Rr

Rf channel release


Assignment failure

Assignment failure







New channel release


see figure 1

DN9813636 217



Figure 26 Unsuccessful internal inter-cell TCH to TCH handover due to MS returning to the old channel

Counter 4015 is updated in the source cell. Counter 4012 is updated in the target cell. Signalling can be also partly missing, depending on where the failure takes place.


Bsc o unsucc ho due return

Bsc i unsucc ho due conn

HO failure

Rf channel release


Meas report

Meas result

HO command

HO command

Channel activation


HO detection

Physical info

HO access


Ua

HO failure

HO failure

Rr

Sabm

New channel release






4015

4012

218 DN9813636




Figure 27 Unsuccessful external TCH to TCH handover due to MS returning to the old channel, source BSC

BTS: MSC:MS: BSC:

Msc o unsucc ho due return



HO command

Sabm


HO required

Meas report

Meas result

HO failure

HO command

HO command

HO failure HO failure

Ua




MS returns to old channel

4006

4009

4005

external HO attempt

see figure 3


DN9813636 219



Figure 28 Unsuccessful external TCH to TCH handover due to MS returning to the old channel, target BSC

BSC:

Msc i end of ho



MS: MSC:BTS:

HO request

Channel activation


HO request ack

Clear command

Rf channel release


Clear complete

HO measurements and external HO


4080

4092

4046

HO failure received from BSS1

New channel release

decision done in source BSC, MSC sends HO request


220 DN9813636




Figure 29 Unsuccessful internal intra-cell TCH to TCH handover due to call clearing during handover

Signalling can also be partly missing, depending on when the call is cleared.

BTS: MSC:MS: BSC:

Int cell call cleared during ho 4039

Meas report

Meas result



Channel activation



Sabm

Establish indicationUa

Disconnect

Release complete

Rf channel release


Disconnect

Release complete

ReleaseRelease

Clear command

Channel release

Deactive SACCHDisc

UaRelease indication

Rf channel release


Target channel release

Source channel release

Call cleared during handover by MS







DN9813636 221



Figure 30 Unsuccessful internal inter-cell TCH to TCH handover due to call clearing during handover

Counter 4042 is updated in the source cell. Counter 4081 is updated in the target cell. Signalling can also be partly missing, depending on when the call is cleared.


Bsc i end of ho

Bsc o call cleared during ho

Release complete

Rf channel release


Meas report

Meas result


Channel activation



HO access


Disconnect

Disconnect

Release

Sabm

Release

Release complete

Clear command

Clear complete

Channel release

Deactive SACCHDisc


Rf channel release







Call cleared during HO by MS

4081

4042

Source channel release

Target channel release

222 DN9813636




Figure 31 Unsuccessful external TCH to TCH handover due to call clearing during handover, source BSC

Signalling can also be partly missing, depending on when the call is cleared.

BTS: MSC:MS: BSC:

Msc o call clear during ho



HO command

Rf channel release


HO required

Meas report

Meas result

Clear complete

HO command

HO command

Clear command

Disconnect Disconnect

ReleaseRelease

Release complete

Release complete

Channel release

Deactive SACCHDisc


4041

4009

4005

Call cleared during HO by MS




see figure 3


DN9813636 223



Figure 32 Unsuccessful internal intra-cell TCH to TCH handover because no radio resources are available due to switch_crc_pool

Figure 33 Unsuccessful internal inter-cell TCH to TCH handover because no radio resources are available due to switch_crc_pool

Counter 4071 is updated in the source cell. Counter 4063 is updated in the target cell. Counters 4063 and 4071 are updated only if the target cell is non-optimum.

BTS: MSC:MS: BSC:

Int unsucc a int circ type 4098


Meas report

Meas result





Unsuccesful reservatio



see figure 1

with cause switch_crc_pool


Bsc i unsucc a int circ type

Bsc o unsucc a int circ type

Bsc o nonopt at

Bsc i nonopt at

Meas report

Meas result




Unsuccessful reservation with cause switch_crc_pool


4097

4096

4071

4063

224 DN9813636




Figure 34 Unsuccessful external TCH to TCH handover because no radio resources are available due to switch_crc_pool, target BSC

BSC:

Msc i unsucc due a if crc



MS: MSC:BTS:

HO request

HO failure

HO measurements and


Unsuccessful reservation


4101

4092

4046

external HO decision done in source BSC, MSC sends HO request


with cause switch_crc_pool

DN9813636 225



Figure 35 Internal intra-cell handover change to external due to circuit pool switching, source side

MS BTS BSC MSC

004076 CELL_TCH_TCH_AT

HO signalling in the target side

Channel reservation and activation in the new target side, HO command from the MSC

HANDOVER COMMAND

004030 CAUSE_INTFER_DWN

004098 HO_UNSUCC_A_INT_CIRC_TYPE

004099 HO_ATT_DUE_SWITCH_CIRC_POOL

004094 MSC_O_ATT_SWITCH_CIRC_POOL

004052 MSC_O_TCH_TCH_AT

004004 MSC_O_SUCC_HO

004049 MSC_O_TCH_TCH

004095 MSC_O_SUCC_SWITCH_CIRC_POOL

004005 MSC_O_HO_RQ_MSG

004009 MSC_O_HO_COMM

HANDOVER COMMANDHANDOVER COMMAND

MEASUREMENT REPORT MEASUREMENT RESULT

Decision to start pool switching procedure is made

MSC switches circuit pool

BSC-internal intra-cell HO started due to high

interference on downlink, for example

Source-TCH is released

CLEAR COMMAND

HANDOVER REQUIRED (switch circuit pool)

PHYSICAL CONTEXT REQUEST

PHYSICAL CONTEXT CONFIRM

226 DN9813636




Figure 36 Internal intra-cell handover change to external due to circuit pool switching, target side

MS BTS BSC MSC

Ho decision of the circuit pool switch made in the source side

HO signalling in the source side, the MSC sends a HO command

HANDOVER REQUEST

HANDOVER ACCESS

HANDOVER DETECTIONHANDOVER DETECTION

HANDOVER COMPLETE HANDOVER COMPLETE

HANDOVER COMPLETE

004204 INT_SUCC_HO_TO_EXT

004092 MSC_I_ATT_SWITCH_CIRC_POOL

004046 MSC_I_TCH_TCH_AT

004000 MSC_I_SUCC_HO

004043 MSC_I_TCH_TCH

004093 MSC_I_SUCC_SWITCH_CIRC_POOL

PHYSICAL INFO

SABM

ESTABLISH INDICATION

UA

RR

CHANNEL ACTIVATION

CHANNEL ACTIVATION ACK

HANDOVER REQUEST ACKNOWLEDGE

DN9813636 227



Figure 37 Successful handover type reselection from an internal inter-cell TCH to TCH handover to an external handover due to switching the circuit pool

MS BSC MSC

HANDOVER COMMAND

CLEAR COMMAND

004203 BSC_O_SUCC_HO_TO_EXT

004067 BSC_O_TCH_TCH_AT

004059 BSC_I_TCH_TCH_AT (updated for target cell)

004096 BSC_O_UNSUCC_A_INT_CIRC_TYPE

004099 HO_ATT_DUE_SWITCH_CIRC_POOL

004094 MSC_O_ATT_SWITCH_CIRC_POOL

004052 MSC_O_TCH_TCH_AT

004097 BSC_I_UNSUCC_A_INT_CIRC_TYPE(updated for target cell)

004004 MSC_O_SUCC_HO

004049 MSC_O_TCH_TCH

004095 MSC_O_SUCC_SWITCH_CIRC_POOL



004030 CAUSE_INTFER_DWN

HANDOVER COMMANDHANDOVER COMMAND



BSC-internal inter-cell HO started due to high

interference on downlink, for example

BTS

Channel reservation and activation in the target cell

Source-TCH is released

HO signalling in the target cell

HANDOVER REQUIRED (switch circuit pool)

MEASUREMENT RESULTMEASUREMENT REPORT

228 DN9813636




Figure 38 Internal inter-cell handover change to external handover due to circuit pool switching, target-cell

BTSMS BSC MSC

HO decision of the circuit pool switch made in the source cell

HO signalling in the source cell, the MSC sends a HO command

HANDOVER REQUEST

HANDOVER ACCESS HANDOVER DETECTIONHANDOVER DETECTION

HANDOVER COMPLETE HANDOVER COMPLETE HANDOVER COMPLETE



PHYSICAL INFO

SABM ESTABLISH INDICATION

UA

RR




CHANNEL ACTIVATION

004202 BSC_I_INT_SUCC_HO_TO_EXT

HANDOVER REQUEST ACKNOWLEDGECHANNEL ACTIVATION ACK

DN9813636 229



Figure 39 Unsuccessful external TCH to TCH handover because the MSC rejects the handover due to various causes, source BSC

BTS: MSC:MS: BSC:

Msc o unsucc due a if crcMsc o fail lackMsc o adj cell id errMsc o end of hoMsc o ho not allowed


HO reject

HO required

Meas report

Meas result



Channel reservation and activation in new (target) BSC

MSC rejects handover with different causes

Call continuous on old channel

4102 or4055 or4100 or4007 or4037

4005

230 DN9813636




Figure 40 Unsuccessful external TCH to TCH handover due to GSM timer T8 expiry, source BSC

Counter 4107 is also updated if the MSC sends a CLEAR_COMMAND message with a cause other than call controlor handover successful.

BTS: MSC:MS: BSC:

Msc o call drop dur ho

Timer T8 Expires

Start timer T8

Msc o end of ho



HO command

Rf channel release


HO required

Meas report

Meas result

Clear complete

HO command

HO command

Clear command

Clear request




4009

4005

Timer T8 expires on source BSC

4107

4007

external HO attempt


while waiting for Clear command

DN9813636 231



Figure 41 Unsuccessful external TCH to TCH handover due to adjacent cell error, source BSC

The MSC sends a HO_REJECT message with cause invalid_cell or the source side BSC notices that the target side identification information is invalid in the HO_COMMAND message.

BTS: MSC:MS: BSC:

Msc o adj cell id err


HO reject

HO required

Meas report

Meas result

HO failure




Target cell information (BCCH

BSC radio network configuration database,


4100

4005

external HO attempt

in new (target) BSC, HO reject from MSC

frequency or / and BSIC) differs from that in source

Alarm 2725 is set

232 DN9813636




Figure 42 Unsuccessful internal intra-cell TCH to TCH handover, caused by an internal timer expiry in the BSC or a CONNECTION_FAILURE, ERROR_INDICATION, or ERROR_REPORT message coming to the target channel

The MS returns to the old channel.

BTS: MSC:MS: BSC:

Int cell unsucc ho due return 4022

Error report

Meas report

Meas result



Channel activation


Assignment command

Assignment command

Connection failure

Error indication

Assignment failure

Rf channel release


Assignment failure







HO measurement, HO decision --> intra-cell HO attempt, old channel

see figure 1

DN9813636 233



Figure 43 Unsuccessful internal inter-cell TCH to TCH handover due to a radio link failure during handover

A RELEASE_INDICATION, CONNECTION_FAILURE or ERROR_INDICATION message comes to the source channel. The signalling can be partly missing depending on where the failure takes place. Counter 4017 is updated in the source cell. Counter 4081 is updated in the target cell.


Bsc i end of ho

Bsc o end of ho due bss

Rf channel release

Rf channel release


Meas report

Meas result

Release indication

Connection failure

Channel activation


Error indication


4081

4017





New TCH channel release in the new BTS


234 DN9813636




Figure 44 Unsuccessful internal inter-cell TCH to TCH handover caused by internal timer expiry or a failure in the connection of a bi-directional speech path

Counters 4017 and 4084 are updated in the source cell. Counters 4013 and 4083 are updated in the target cell.


Failure

Bsc i drop calls

Bsc i unsucc ho due bss probl

Bsc o drop calls

Bsc o end of ho due bss

Rf channel release


Meas reportMeas result


Channel activation



HO access



Rr

Sabm

Rf channel release


Clear request

Clear command

Channel release

Deactive SACCHDisc

Release indicationUa

Clear complete

Target channel release in new BTS


4083

4013

4084

4017

Connection of bidirection speech path fails or internal time r expires






DN9813636 235



Figure 45 Unsuccessful external TCH to TCH handover due to a radio link failure during handover, source BSC

A CONNECTION_FAILURE, ERROR_INDICATION or ERROR_REPORT message comes to the source channel, or an internal timer expires.

BTS: MSC:MS: BSC:

Msc o end of ho due bss

Connection failure

Rf channel release


HO required

Meas report

Meas result

HO failure

Error indication

Error report

4008


Failures on source




236 DN9813636




Figure 46 Unsuccessful external TCH to TCH handover due to a radio link failure during handover, target BSC

A CONNECTION_FAILURE, ERROR_INDICATION or ERROR_REPORT message comes to the target channel, or an internal timer expires. Signalling can be partly missing depending on where the failure takes place.

BSC:

Msc i unsucc ho due conn



MS: MSC:BTS:

HO request

Channel activation


HO request ack

HO access


Physical info

Sabm


Ua

Error indication

Error report

Connection failure

HO failure

Rf channel release


4002

4092

4046



HO measurements and external HO decision done in source BSC, MSC sends HO request


DN9813636 237



Figure 47 Unsuccessful external TCH or TCH handover, source BSC

The GSM timer T7 expires in the source BSC.

BTS: MSC:MS: BSC:

Msc o fail lack

Timer T7 expires

Start timer T7

Msc o gen ho required msg

HO required

Meas report

Meas result


4055

4005

Timer T7 expires on source BSC




238 DN9813636




Figure 48 Unsuccessful external TCH to TCH handover, target BSC

The handover fails because the MSC sends a CLEAR_COMMAND message with a cause other than call control or radio interface failure revision to old channel. Counter 4108 is also updated if the GSM timer T9113 expires.

BSC:

Msc i call poss drop dur ho

Msc i end of ho



MS: MSC:BTS:

HO request

Channel activation


HO request ack

Clear command

Rf channel release


Clear complete

New channel release

HO failure received from BSS1

Channel reservation


4108

4080

4092

4046



DN9813636 239



Figure 49 Successful internal intra-cell TCH TCH HSCSD handover from two to one channel

BTS: MSC:MS: BSC:



Channel activation

Assignment command

Assignment command

SabmEstablish indication

Ua

Rr HO performed

Rf channel release


Assignment completeAssignment complete



Rf channel release


Normal intra-cell HO counters

Old channels are released




Only one suitable channel free

Normal intra-cell HO cause


Two channel allocated

Intra succ dec for HSCSD 4127

Intra succ for HSCSD 4125

Cell TCH TCH 4073

Intra att for HSCSD 4124


Int cell success ho 4018

for HSCSD call on source


counter is updated, see figure 1

are updated, see figure 1

240 DN9813636




Figure 50 Successful internal intra-cell TCH TCH HSCSD handover from one to three channels

BTS: MSC:MS: BSC:



Channel activation



Ua

Rr HO performed

Rf channel release


Assignment completeAssignment complete



Channel activation

Channel activation



One channel allocated


Normal intra-cell HO cause





Normal intra-cell HO counters are

Old channels are released

Intra att for HSCSD 4124

Intra succ inc for HSCSD 4126

Cell TCH TCH 4073

Int cell success ho 4018


Intra succ inc for HSCSD 4126


for HSCSD call on source

counter is updated, see figure 1

updated, see figure 1

DN9813636 241



Figure 51 Successful internal inter-cell TCH TCH HSCSD handover from three to one channel


HO performed

Rf channel release




HO detection

Physical info

HO access


Ua


Rr

Sabm


Rf channel release

Rf channel release


Three channel allocated for HSCSD call on source


Normal inter-cell HO cause counter is updated, see figure 2


Only two suitable channel free

Channel activation


Channel activation





Bsc i succ dec for HSCSD 4123

Bsc i succ for HSCSD 4121

Bsc o succ for HSCSD 4119

Bsc i TCH TCH 4056

Bsc i nonopt 4062

Bsc i success ho 4010

Bsc o TCH TCH 4064

Bsc o nonopt 4070

Bsc o success ho 4014

Bsc i nonopt att 4063

Bsc o nonopt att 4071

Bsc o att for HSCSD 4118

Bsc i att for HSCSD 4120

Bsc o TCH TCH att 4067

Bsc i TCH TCH att 4059

242 DN9813636




Figure 52 Successful internal inter-cell TCH TCH HSCSD handover from two to three channels


HO performed

Rf channel release



Channel activation


HO detection

Physical info

HO access


Ua


Rr

Sabm


Channel activation

Channel activation



Rf channel release





Normal inter-cell HO cause counter is updated, see figure 2

Two channel allocated for HSCSD call on source



Bsc i succ inc for HSCSD 4122

Bsc i succ for HSCSD 4121

Bsc o succ for HSCSD 4119

Bsc i TCH TCH 4056

Bsc o TCH TCH 4064

Bsc i nonopt 4062

Bsc i success ho 4010

Bsc o nonopt 4070

Bsc o success ho 4014

Bsc i nonopt att 4063

Bsc o nonopt att 4071

Bsc o att for HSCSD 4118

Bsc i att for HSCSD 4120

Bsc o TCH TCH att 4067

Bsc i TCH TCH att 4059

DN9813636 243



Figure 53 Successful external TCH TCH HSCSD handover from two to two channels, source BSC

BTS: MSC:MS: BSC:

HO command

Rf channel release


HO required


Clear complete


Clear command

Rf channel release



Normal external HO cause counter


Old channels are released in the old BSC

Msc o succ TCH TCH ho 4049

Msc o success ho 4004

Msc o gen ho com msg 4009

Msc o gen ho req msg 4005

Msc o TCH TCH att 4052

Msc o succ for HSCSD 4113

Msc o att for HSCSD 4112

external HO attempt

is updated, see figure 3

in new (target) BSC, HO command from MSC

244 DN9813636




Figure 54 Successful external TCH TCH HSCSD handover from four to one channel, target BSC

Counter 4117 is updated only if the target BSC has received information on the amount of channels allocated in the source BSC.

BSC:MS: MSC:BTS:

HO request

Channel activation


HO request ack

HO access HO detection HO detection

Physical info


Ua

HO complete

Rr

HO complete

HO completed


Channel reservations and activations in the new BTS

HO measurem. and external HO decision done in source BSC, MS C sends HO request

Four channel allocated for HSCSD on source BSC


Msc i succ dec for HSCSD 4117

Msc i succ for HSCSD 4115

Msc i succ TCH TCH ho 4043

Msc i TCH TCH ho att 4046

Msc i success ho 4000

Msc i att for HSCSD 4114

DN9813636 245



Figure 55 Successful external TCH TCH HSCSD handover from one to two channels, target BSC

Counter 4116 is updated only if the target BSC has received information on the amount of channels allocated in the source BSC.

BSC:MS: MSC:BTS:

HO request

Channel activation


HO request ack

HO access HO detection HO detection

Physical info


Ua

HO complete

Rr

HO complete

HO completed

Channel activation




HO measurem. and external HO decision done in source BSC, MS C sends HO request

One channel allocated for HSCSD on source BSC

Channel reservations and activations in the new BTS

Msc i succ TCH TCH ho 4043

Msc i succ for HSCSD 4115

Msc i succ inc for HSCSD 4116

Msc i TCH TCH ho att 4046

Msc i success ho 4000

Msc i att for HSCSD 4114

246 DN9813636




Figure 56 Internal intra-cell direct access from regular DCCH to a super-reuse TRX

The optional BSS7057 Direct Access to Super-reuse TRX in IUO must be activated.

BSC:

Int cell success hot

Cell sdcch tch att

Cell sdcch tch

Ho due direct access att

MS: MSC:BTS:

Assignment request



Channel activation




Ua

Rr

Assignment complete

Rf channel release


Assignment complete Assignment complete

Alert Alert


Connect Connect

Basic call signalling

4077

4128


TCH reservation and activation

Signalling on SDCCH

Signalling on FACCH - TCH

4018

4074

SDCCH release

Connection

Conversation phase

DN9813636 247



Figure 57 Internal inter-cell direct access from the TCH on a child TRX to the TCH on a parent TRX

BSS7057 Direct Access to Super-reuse TRX in IUO must be activated. Counters 4031, 4067, 4014 and 4064 are updated in the source cell. Counters 4059, 4010 and 4056 are updated in the target cell.

BSC:

Cause umbrella ho

Bsc o tch tch

Bsc i tch tch

Bsc i success ho

Bsc i tch tch at

Bsc o tch tch at

Bsc o success ho

MS: MSC:BTS:

Meas report

HO access


Channel activation


HO detection


Ua

Rr HO performed

Rf channel release



Physical info

Meas result


4031

4064

4056

4010

4059

4067

4014





248 DN9813636




Figure 58 Handover attempt due to a BSC controlled TRHO

Figure 59 Handover attempt due to DADL/B

Channel activation


Rf resource indication

HO signalling continues

HO measurements

BSC:MS: MSC:BTS:

Cause HO started by traffic reason 4035

Channel activation


Assignment request



BSC:MS: MSC:BTS:

HO attempt due to dadl/b 4129

Signalling

Signalling continues

DN9813636 249



Figure 60 AMR packing or unpacking handover

MS BTS BSC MSC

MEASUREMENT REPORT MEASUREMENT RESULT

004076 CELL_TCH_TCH_AT

R F C H A N N E L R E L E A S E

R F C H A N N E L R E L E A S E A C K

004142 HO_ATT_FOR_AMR_TO_HR or004143 HO_ATT_FOR_AMR_TO FR

CHANNEL ACTIVATION


ASSIGNMENT COMMAND

ASSIGNMENT COMMAND


UA

ASSIGNMENT COMPLETE ASSIGNMENT COMPLETE

RR

HANDOVER PERFORMED

004073 CELL_TCH_TCH

004018 CELL_SUCC_HO

004205 HO_SUCC_AMR_FR_TO_HR or004206 HO_SUCC_AMR_HR_TO_FR

BSC-internal intra-cell HO started due to AMR

packing or unpacking HO



250 DN9813636




Figure 61 Circuit pool switch during inter-system handover, target-BSC

BTSMS BSC MSC

HANDOVER REQUEST

HANDOVER ACCESS HANDOVER DETECTIONHANDOVER DETECTION

HANDOVER COMPLETE HANDOVER COMPLETE HANDOVER COMPLETE

HANDOVER REQUEST

HO measurements and external HO decision made in the source cell, MSC sends HO request

Signalling on the target cell, connection



004208 MSC_I_WCDMA_SUCC_POOL_SWITCH

CHANNEL ACTIVATION

PHYSICAL INFO


UA

004149 MSC_HO_WCDMA_RAN_SUCC

004153 MSC_GEN_SYS_WCDMA_RAN_HO_REQ

004154 MSC_GEN_SYS_WCDMA_RAN_HO_COM

04144 MSC_TCH_HO_FROM_WCDMA_RAN_ATT

004207 MSC_I_WCDMA_UNSUC_POOL_SWITCH

04144 MSC_TCH_HO_FROM_WCDMA_RAN_ATT

HANDOVER FAILURE (switch circuit pool)

CHANNEL ACTIVATION ACK HANDOVER REQUEST ACKNOWLEDGE

DN9813636 251



Figure 62 Circuit pool switch during external handover, target-BSC

HANDOVER COMPLETE HANDOVER COMPLETE

HO measurements and external HO decision made in source-BSC, the MSC sends HO a request






PHYSICAL INFO


UA





HANDOVER REQUEST ACKNOWLEDGE

HANDOVER COMPLETE

BTSMS BSC MSC

HANDOVER ACCESS HANDOVER DETECTION

HO measurements and external HO decision made in the source-BSC, the MSC sends HO a request




004101 MSC_CONTROLLED_IN_HO



CHANNEL ACTIVATION








HANDOVER DETECTION

HANDOVER REQUEST

HANDOVER REQUEST

HANDOVER COMPLETE

HO measurements and external HO decision made in source-BSC, the MSC sends HO a request







UA





BTSMS BSC MSC

HO measurements and external HO decision made in the source-BSC, the MSC sends a HO request




004101 MSC_CONTROLLED_IN_HO










HANDOVER FAILURE (switch circuit pool)

252 DN9813636




Figure 63 BSS Internal Handover with MSC Support - Local Handover

Codec change with non matching codec configuration from FR AMR to HR AMR, target L-BTS2 allows only HR-mode; TC in MGW

DN9813636 253



Figure 64 BSS Internal Handover with MSC Support - Distant Handover

Codec change with non matching codec configuration from FR AMR to HR AMR, target L-BTS2 allows only HR-mode; TC in MGW

254 DN9813636




Figure 65 Intra BSC HO; interface type change from AoIP to AoTDM; TC in MGW

Related topics4 Handover Measurement


DN9813636 255

4 Handover Measurement Signalling charts of Dual Transfer Mode

Id:0900d8058061b21dConfidential

4 Signalling charts of Dual Transfer ModeThe following figures show the signalling charts of Dual Transfer Mode:

Figure 66 MO DTM call establishment

MS BTS BSC MSC

MEASUREMENT REPORT

CHANNEL ACTIVATION


SABM


UA

ASSIGNMENT COMPLETE

RR

HANDOVER PERFORMED

RF CHANNEL RELEASE

RF CHANNEL RELEASE ACK

106000 MO_DTM_CALL_REQUESTS_INI

DTM REQUEST

MEASUREMENT RESULT



DTM ASSIGNMENT COMMAND

105016 DTM_REQ_1_UL_PS_TSL or105017 DTM_REQ_2_UL_PS_TSL

105009 DTM_ALLOCATIONS_INITIAL

105015 PEAK_DTM_CS_SIMULTAN

105021 DTM_ALLOC_1_UL_PS_TSL or105022 DTM_ALLOC_2_UL_PS_TSL

Start T3107

051189 INTRA_DTM_MO_CS_TO_PS

106018 DTM_ASSIGN_COMMANDS

071038 REPORTING_TIME_BY_DTM_MS

071037 TCH_RESERV_BY_DTM_MS

MS in dedicated mode

PS data transfer in dual transfer mode

Stop T3107

DUMMY RLC BLOCK

UL RLC BLOCK

105026 UL_DTM_TBF_ESTABLISHMENTS

256 DN9813636



Signalling charts of Dual Transfer Mode

Figure 67 MT DTM call establishment

MS BTS BSC MSC

SABM

UA

RR

105000 MT_DTM_CALL_REQUESTS_INI

SGSN

LLC PDU

MEASUREMENTREPORT MEASUREMENT RESULT



ASSIGNMENT COMPLETE

HANDOVER PERFORMED



CHANNEL ACTIVATION

RF CHANNEL RELEASE




105023 DTM_ALLOC_1_DL_PS_TSL or105024 DTM_ALLOC_2_DL_PS_TSL


051190 INTRA_DTM_MT_CS_TO_PS



105018 DTM_REQ_1_DL_PS_TSL or105019 DTM_REQ_2_DL_PS_TSL


PS data transfer in dual transfer mode

105027 DL_DTM_TBF_ESTABLISHMENTS

(EGPRS) PACKET DOWNLINK ACK/NACK

DL RLC BLOCK


DN9813636 257



Figure 68 DTM call reallocation; too high CS connection interference

MS BTS BSC MSC

MEASUREMENT REPORT

CHANNEL ACTIVATION



SABM


UA

ASSIGNMENT COMPLETE

RRHANDOVER PERFORMED

RF CHANNEL RELEASE



MEASUREMENT RESULT

CS connection controldetects too high CSconnection interference





106006 DTM_REALLO_CS_REQUESTS

MS has a DTM allocation with one UL PS TSL allocation

DTM call continues on the new resources

105010 DTM_REALLOCATIONS



258 DN9813636




Figure 69 DTM call reallocation; inadequate PS connection quality

MS BTS BSC MSC

CHANNEL ACTIVATION


SABMESTABLISH INDICATION

UA

ASSIGNMENT COMPLETE

RR

HANDOVER PERFORMED

RF CHANNEL RELEASE


MEASUREMENT REPORT


PS quality control detectsinadequate quality

MEASUREMENT RESULT





051191 INTRA_DTM_MT_PS_TO_PS



105005 DTM_REALLO_REQ_PS_QUAL

MS has a DTM allocation with one DL PS TSL allocation

DTM call continues on the new resources

105018 DTM_REQ_1_DL_PS_TSL or105019 DTM_REQ_2_DL_PS_TSL


DN9813636 259



Figure 70 DTM call; internal inter-cell handover; CS connection power budget

BTS1 BTS2 BSC MSC

CHANNEL ACTIVATION

HANDOVER ACCESS

MS

PHYSICAL INFO

SABM

UA

RR

DTM INFORMATION

MS has a DTM allocation



MEASUREMENT REPORT

MEASUREMENT RESULT

CS connection control startsa power budget handover

HANDOVER COMMAND

HANDOVER DETECTION


HANDOVER COMPLETE

HANDOVER PERFORMED

RF CHANNEL RELEASE

CS connection continues in the CS territory of the target cell.The DTM call is then re-established in the target cell.

105011 DTM_DURATION_SUM_FR

004199 DTM_CALL_HO_SUCC_TO_DTM_CELL

072202 DL_TBF_RELEASES_DUE_DTM

072201 UL_TBF_RELEASES_DUE_DTM

004198 DTM_CALL_HO_ATT_TO_DTM_CELL

106013 DTM_RELEASES_DUE_CS_HO



HANDOVER COMPLETE

004194 DTM_CALL_HO_FROM_DTM_CELL

260 DN9813636




Figure 71 DTM call; internal inter-cell handover; lack of resources in the PS territory

BTS1 BTS2 BSC MSC

HANDOVER ACCESS

MS

PHYSICAL INFO

SABM

UA

RR

DTM INFORMATION



HANDOVER PERFORMED

CHANNEL ACTIVATION

HANDOVER COMMAND

HANDOVER DETECTION


HANDOVER COMPLETE

HANDOVER COMPLETE

RF CHANNEL RELEASE

004194 DTM_CALL_HO_FROM_DTM_CELL



004195DTM_HO_DUE_LACK_OF_RESOURCES







No free resources in the PS territory


DN9813636 261



Figure 72 DTM call; external handover, source BSC

MS BTS BSC MSC

RF CHANNEL RELEASE


MEASUREMENT RESULT

MEASUREMENT REPORT

HANDOVER REQUIRED

HANDOVER COMMAND

CLEAR COMMAND

CLEAR COMPLETE









MS has a DTM allocation

Channel reservation and activation in the target BSC

HO signalling in the target BSC


262 DN9813636




Figure 73 DTM call; external handover, target BSC

MS BTS BSC MSC

CHANNEL ACTIVATION


HANDOVER ACCESS

HANDOVER DETECTION

PHYSICAL INFO

SABM


UA

HANDOVER COMPLETE

RR

DTM INFORMATION

HANDOVER REQUEST

HANDOVER REQUESTACKNOWLEDGE

External handover decision in the source BSC

HO signalling in the source BSC, the MSC sends a HO command

Old resources released in the source BSC

The DTM call is then re-established in the target cell.CS connection continues in the CS territory of the target cell.

DN9813636 263



Figure 74 DTM call release initiated by the MS

MS BTS BSC MSC

DISCONNECT

RELEASE

RELEASE COMPLETE

CLEAR COMMAND

106012 DTM_RELEASES_DUE_CS_RELEASE

CLEAR COMPLETE

CHANNEL RELEASE

DEACTIVATE SACCH

UA

DISC

RELEASE INDICATION

RF CHANNEL RELEASE


MS has a DTM allocation with ongoing UL and/or DL TBFs






START TIMER T3111

TIMER T3111 EXPIRES

264 DN9813636




Figure 75 DTM call release; packet data transfer end

MS BTS BSC MSC

SABM

UA

106011 DTM_RELEASES_DUE_PS_RELEASE

SGSN

Last LLC PDU

RR

DL Data Frame (final block), polling

UNACK MODE: Packet Control Ack

ASSIGNMENT COMMAND


ASSIGNMENT COMPLETE

HANDOVER PERFORMED


ACK MODE: (EGPRS) Packet DL Ack /Nack (final ack)



CHANNEL ACTIVATION

RF CHANNEL RELEASE

051192 INTRA_DTM_PS_TO_CS




CS connection continues in the CS territory


RR


DN9813636 265



Figure 76 DTM REQUEST rejected when IMSI data not available

MS BTS BSC MSC

CHANNEL REQUEST

CHANNEL ACTIVATION


IMMEDIATE ASSIGNMENT


UA

CLASSMARK CHANGE

CHANNEL ACTIVATION


ASSIGNMENT COMMAND


UA

ASSIGNMENT COMPLETE

DTM REQUEST

RF CHANNEL RELEASE


CONNECT ACK

CONNECT

DTM REJECT

106002 MO_DTM_CALL_REJECTS_INI

GPRS INFORMATION

SETUP

CALL PROCEEDING

ALERT

RR

SGSN

LLC PDU

CM SERVICE REQUEST

CLASSMARK UPDATE

COMMON ID (not received)


106017 DTM_IMSI_NOT_AVAILABLE



Authentication, identity request and ciphering

MS continues in dedicated mode.

ASSIGNMENT REQUEST

266 DN9813636




Figure 77 Unsuccessful MO DTM; activation of a CS TCH in the PS territory fails, timer expires while waiting for CHANNEL ACTIVATION ACK

MS BTS BSC

MEASUREMENT REPORT

CHANNEL ACTIVATION




CHANNEL ACTIVATION ACK (not received)

Start T9103

T9103 expires

RF CHANNEL RELEASE


DTM REQUEST

MEASUREMENT RESULT




106002 MO_DTM_CALL_REJECTS_INI

CS call continues on the old TCH channel


DN9813636 267



Figure 78 Unsuccessful MT DTM; activation of a CS TCH in the PS territory fails, timer expires while waiting for CHANNEL ACTIVATION ACK

SGSNMS BTS BSC

MEASUREMENT REPORT

CHANNEL ACTIVATION

Start T9103

T9103 expires

RF CHANNEL RELEASE


105000 MT_DTM_CALL_REQUESTS_INI

DL LLC PDU

MEASUREMENT RESULT


CHANNEL ACTIVATION ACK (not received)


105019 DTM_REQ_2_DL_PS_TSL105018 DTM_REQ_1_DL_PS_TSL or


105002 MT_DTM_CALL_REJECTS_INI




268 DN9813636




Figure 79 Unsuccessful MT DTM; DTM ASSIGNMENT FAILURE received

MS BTS BSC

SABM


UA

DTM ASSIGNMENT FAILURE

RF CHANNEL RELEASE


RR


106008 DTM_ASSIGN_FAILURES_INI



MT DTM call establishment started; see MT DTM scenario untilDTM ASSIGNMENT COMMAND in figure MT DTM call establishment



DN9813636 269



Figure 80 Timer T3107 expires while waiting for ASSIGNMENT COMPLETE

MS BTS BSC MSC

SABM


RF CHANNEL RELEASE


RF CHANNEL RELEASE


106010 MS_LOST_DURING_ASSIGNMENT

CLEAR REQUEST

CLEAR COMMAND

CLEAR COMPLETE


UA

ASSIGNMENT COMPLETE (not received)

T3107 expires




Release of the new TCH channel

Release of the old TCH channel

MO or MT DTM call establishment started; see MT DTM scenario untilDTM ASSIGNMENT COMMAND in figure MT DTM call establishment

Start T3107



270 DN9813636




Figure 81 DTM call reallocation failure; DTM ASSIGNMENT FAILURE received

MS BTS BSC



MEASUREMENT REPORT

CHANNEL ACTIVATION


RR

106009 DTM_ASSIGN_FAILURES_REALLO

RF CHANNEL RELEASE



PS quality control detectsinadequate quality

MEASUREMENT RESULT


DTM ASSIGNMENT FAILURE




DTM call continues on the old resources



DN9813636 271



Figure 82 DTM CS connection drops after ASSIGNMENT COMPLETE; CONNEC-TION FAILURE received

MS BTS BSC MSC

HANDOVER PERFORMED

DISC

CLEAR COMMAND

CHANNEL RELEASE

DEACTIVATE SACCH

UA


RF CHANNEL RELEASE

RELEASE INDICATION

CLEAR COMPLETE

CONNECTION FAILURECLEAR REQUEST

001234 DROP_DTM_TCH_ASCMPL_RFCH_REL

Radio Link Failure detected

ASSIGNMENT COMPLETE

MS has a DTM allocation with ongoing UL and/or DL TBFs;for example, see figure MO DTM call establishment

001233 DROP_AFTER_DTM_TCH_ASSIGN




072202 DL_TBF_RELEASES_DUE_DTM072201 UL_TBF_RELEASES_DUE_DTM or


RF CHANNEL RELEASE

106014 DTM_RELEASES_DUE_OTHER

051189 INTRA_DTM_MO_CS_TO_PS



272 DN9813636




Figure 83 DTM CS connection drops after ASSIGNMENT COMPLETE; RELEASE INDICATION not received

MS BTS BSC MSC

RELEASE

RELEASE COMPLETE

CLEAR COMMAND

CHANNEL RELEASE

DEACTIVATE SACCH SCCP RELEASE COMPLETE

SCCP RELEASE

DISCONNECT


RF CHANNEL RELEASE


DISC (not received)

RELEASE INDICATION (not received)

T3109 expires

Start T3109

MS has a DTM allocation with ongoing UL and/or DL TBFs; for example, see figureMO DTM call establishment




CLEAR COMPLETE

106012 DTM_RELEASES_DUE_CS_RELEASE



DN9813636 273



Figure 84 Unsuccessful DTM call reallocation; timer T3107 expires while waiting for ASSIGNMENT COMPLETE

MS BTS BSC MSC

CHANNEL ACTIVATION


SABM


MEASUREMENT REPORT


T3107 expires

RF CHANNEL RELEASE


RF CHANNEL RELEASE


CLEAR REQUEST

CLEAR COMMAND

CLEAR COMPLETE

106024 MS_LOST_DURING_REALLOCATION




T3111 expires

PS quality control detects inadequate quality


105018 DTM_REQ_1_DL_PS_TSL or

105019 DTM_REQ_2_DL_PS_TSL

105023 DTM_ALLOC_1_DL_PS_TSL or

105024 DTM_ALLOC_2_DL_PS_TSL

001233 DROP_AFTER_DTM_TCH_ASSIGN


Release of the old TCH channel

Release of the new TCH channel

MS has a DTM allocation with one DL PS TSL allocation


DTM ASSIGNMENT COMMAND DTM ASSIGNMENT COMMAND


MEASUREMENT RESULT


ASSIGNMENT COMPLETE (not received)

274 DN9813636




Figure 85 DTM TBF assignment failure; UL RLC block not received

MS BTS BSC MSC

CHANNEL ACTIVATION


UL RLC block (not received)



MS requests a UL TBF

dummy RLC block

Expiry of DTM_CALL_ASSIGN_TIMER

105008 DTM TBF ASSIGNMENT FAILURES


ASSIGNMENT COMMAND

ESTABLISH INDICATIONUA

ASSIGNMENT COMPLETE

HANDOVER PERFORMED

RF CHANNEL RELEASE

051198 INTRA_DTM_PS_TO_CS



RR

106011 DTM_RELEASES_DUE_PS_RELEASE


105016 DTM_REQ_1_UL_PS_TSL or

105017 DTM_REQ_2_UL_PS_TSL

105021 DTM_ALLOC_1_UL_PS_TSL or

105022 DTM_ALLOC_2_UL_PS_TSL

105015 PEAK_DTM_CS_SIMULTANUA

MEASUREMENT RESULT

ASSIGNMENT COMMAND

dummy RLC block

ASSIGNMENT COMPLETEASSIGNMENT COMPLETE

CS connection continues in the CS territory

DTM ASSIGNMENT COMMAND DTM ASSIGNMENT COMMAND







CHANNEL ACTIVATION


MS in dedicated mode, MO call

DTM REQUEST DTM REQUEST

MEASUREMENT REPORT

RR

SABM

ASSIGNMENT COMPLETE

Start DTM_CALL_ASSIGN_TIMER

DN9813636 275



Figure 86 DTM-capable MS paging

Related topics

• 1 Traffic Measurement • Counters of Traffic Measurement

• 4 Handover Measurement • Counters of Handover Measurement

• 51 BSC Level Clear Code (PM) Measurement • Counters of 51 BSC Level Clear Code (PM) Measurement

• 71 MS Capability Indication Measurement • Counters of MS Capability Indication Measurement

• 72 Packet Control Unit Measurement • Counters of Packet Control Unit Measurement

• 105 PS DTM Measurement • Counters of PS DTM Measurement

• 106 CS DTM Measurement • Counters of CS DTM Measurement

Documents

handover measurement.pdf