DST EDGE Trial'2004 Report

7/29/2019 DST EDGE Trial'2004 Report

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CONFIDENTIAL

01 October 9, 2004 Creation Hisham Abdelwahed Penrat Loasakul

ED DATE CHANGE NOTE APPRAISAL AUTHORITY ORIGINATOR

Page 1/46

DDSSTT PPRROOJJEECCTT:: EEGGPPRRSS TTRRIIAALL RREEPPOORRTT

ED 01 DST Project: EDGE Trial Report Released

MND DST_EDGE_Trial'2004_Report.doc


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CONFIDENTIAL Page 2/46

TTAABBLLEE OOFF CCOONNTTEENNTTSS

1 Introduction .........................................................................................5

2 Trial Description ...................................................................................6

2.1 Trial Area..................................................................................................... 6

2.2 Test Tools ..................................................................................................... 6

2.3 Trial Procedure............................................................................................ 7

2.4 Activity calendar........................................................................................ 8

3 Trial Result...........................................................................................11

3.1 End User QoS Test Result .......................................................................... 11

3.1.1 GPRS Performance Improvement 11

3.1.2 EDGE Performance (TRX Class 2 to 5) 12

3.1.3 GPRS and EDGE Comparison 13

3.1.4 Data Throughput vs Hopping Type 14

3.1.5 Data Throughput vs Radio Condition 15

3.1.6 MMS Test Result 16

Mobility Test......................................................................................................... 19

3.1.7 GPRS with TRX Class 1 (B7 release) 20

3.1.8 GPRS with TRX Class 2 (B8 release) 23

3.1.9 EGPRS with TRX Class 2 (B8 release) 26




4 GPRS & EGPRS QoS statistics.............................................................33

4.1 TBF Establishment Phase .......................................................................... 33

4.2 TBF Release Phase.................................................................................... 34

4.3 Data Packet Traffic................................................................................... 34

4.4 Data Transfer throughput......................................................................... 36

5 Conclusion.........................................................................................37




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TTAABBLLEE OOFF FFIIGGUURREESS

Figure1: Trial Area .......................................................................................................................................6

Figure2: Drive Test Route 1 ........................................................................................................................7

Figure3: Download FTP GPRS with TRX class 1 ....................................................................................11

Figure4: Upload FTP GPRS with TRX class 1 ..........................................................................................12

Figure5: Download FTP EGPRS with TRX class 2 to 5 ..........................................................................12

Figure6: Download FTP Compare between GPRS and EGPRS ........................................................13

Figure7: Upload FTP Compare between GPRS and EGPRS .............................................................13

Figure10: Download FTP Radio condition effect ................................................................................15

Figure11: Upload FTP Radio condition effect .....................................................................................15

Figure12: Sending and Receiving MMS ..................................................................................................16

Figure13: EGPRS with TRX class2 - ending and Receiving MMS ..........................................................17




Figure17: GPRS (TRX class1): Downlink coding scheme of mobility test ............................................20

Figure18: GPRS (TRX class1): Downlink RLC throughput of mobility test ............................................20

Figure19: GPRS (TRX class1): Downlink RLC throughput per PDCH of mobility test .........................21

Figure20: GPRS (TRX class1): Uplink coding scheme of mobility test .................................................21

Figure21: GPRS (TRX class1): Uplink RLC throughput of mobility test .................................................22

Figure22: GPRS (TRX class1): Uplink RLC throughput per PDCH of mobility test ...............................22

Figure23: GPRS (TRX class2): Downlink coding scheme of mobility test ............................................23

Figure24: GPRS (TRX class2): Downlink RLC throughput of mobility test ............................................23

Figure25: GPRS (TRX class2): Downlink RLC throughput per PDCH of mobility test .........................24

Figure26: GPRS (TRX class2): Uplink coding scheme of mobility test .................................................24

Figure27: GPRS (TRX class2): Uplink RLC throughput of mobility test .................................................25

Figure28: GPRS (TRX class2): Uplink RLC throughput per PDCH of mobility test ...............................25

Figure29: EGPRS (TRX class2): Downlink coding scheme of mobility test ..........................................26

Figure30: EGPRS (TRX class2): Downlink RLC throughput of mobility test ..........................................26

Figure31: EGPRS (TRX class2): Downlink RLC throughput per PDCH of mobility test .......................27

Figure32: EGPRS (TRX class2): Uplink coding scheme of mobility test ...............................................27

Figure33: EGPRS (TRX class2): Uplink RLC throughput of mobility test ...............................................28







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Figure43: Downlink TBF establishment .....................................................................................................33

Figure44: Uplink TBF establishment ..........................................................................................................33

Figure45: Downlink TBF release ................................................................................................................34

Figure46: Uplink TBF release ......................................................................................................................34

Figure47: GPRS Downlink Traffic ...............................................................................................................34

Figure48: EGPRS Downlink Traffic .............................................................................................................35

Figure49: GPRS Uplink Traffic ....................................................................................................................35

Figure50: EGPRS Uplink Traffic ..................................................................................................................35

Figure51: Downlink throughput ................................................................................................................36

Figure52: Uplink throughput .....................................................................................................................36

Figure53: TRX class ......................................................................................................................................38

Figure54: Radio conditions define for field test .....................................................................................39

Figure55: Maximum RLC throughput of Modulation Coding Scheme ..............................................40

Figure56: Maximum RLC throughput of Coding Scheme ...................................................................41

Figure57: Radio parameters .....................................................................................................................45



Figure58: Changed parameters ..............................................................................................................45


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1 INTRODUCTION

This document is created to present the results of EGPRS trial of DST project,Brunei. The purpose of this trial is to assess the improvement, which brought by

EGPRS radio access. The EGPRS feature is introduced in BSS B8 release, to

improve the data throughput.

The trial consist of 4 parts:

1. Validate the GPRS service improvement, which brought by new coding

scheme CS3 and CS4 in BSS release B8 MR4.

2. Access the data throughput improvement, which brought by new

feature, EDGE radio access.

3. Access the EDGE performance impact due to frequency hopping type(NH, BBH, RH/NH)

4. Compare the data throughput gain between EDGE and GPRS on

difference radio condition (Good, Normal, Poor)

The document contains the following topics:

- Test description

- Test result, which consist of 2 parts, static and mobility test.

- GPRS and EGPRS QoS statistics.




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2 TRIAL DESCRIPTION

2.1 Trial AreaThe trial area consists of 6 sites in 3 areas in Brunei. Figure below shows the position of

3 areas, Mangsalut, Tungku and Yayasan. In Mangsalut area has 4 sites, Cube

Mentiri, Mangsalut, Tanah_Jambu and Sungai_Hanching. In Tungku and Yayasan

area has 2 sites, Tungku and Yayasan.

The 6 sites are located to dedicate BSC, BSC_5_HQ, which is BSS B8 release.

Figure1: Trial Area

2.2 Test Tools

Radio measurement tool:

Drive test software TEMS investigate version 5.0

End User QoS measurement tool:

End User QoS test program, DEUTRIP version 2.1.A

FTP Browser: AceFTP version 3 (3.50.0)

DEUTRIP is use in upload FTP test, and AceFTP_Freeware in download FTP test,

because problem that DEUTRIP doesn't support type of DSTs FTP server.

Anyway the problem between DEUTRIP and FTP server will be solved in the

next DEUTRIP release (delivery expected end of October2004).




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Radio QoS statistic tool:

RNO/NPA for QoS statistic monitoring.

EDGE terminal:

MS with EDGE capable, Nokia 6220, is 3GPP GSM Release 99 terminalsupporting GPRS and EGPRS service, and support also Release 97 GPRS

networks. 2+1 in case of EGPRS transfers, 3+1 in case of GPRS transfers with

downlink bias and 2+2 in case of GPRS uplink transfers.

2.3 Trial Procedure

The trial is consists of 2 parts in 2 applications, FTP and MMS. FTP application is use to

verify data transfer performance. MMS application is use to verify data packet

service performance of popular application.

The trial test is consists of 2 parts, static and mobility test.1. Static test is performed on 3 cells, MTR002_1, MSL001_1, YYS201_2. On each

cell, 3 different radio conditions are selected, based on the downlink received

level (Rxlev) and Mean BEP (Bit Error Probability). Detail of radio condition

define is in APPENDIX B.

2. Mobility test is performed in the areas, which serving by 4 sites:

Cube_Mentiri: MTR002_1

Mangsalut: MSL001_1, MSL001_2, MSL001_3

Tanah_Jambu: TJB001_1, TJB001_2, TJB001_3

Sungai_Hanching: SHC001_1, SHC001_2, SHC001_3

Figure2: Drive Test Route 1




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2.4 Activity calendar



EDGE

GPRS

Good

Normal

Poor

NH

BBH

NH/RH

Static

Mobility

5 4 3 2 1

20/09/2004 DL FTP - 1000KBytes X X X Drive test route 1

17/09/2004 DL FTP - 1000KBytes 10 X X X X X MTR002_1



20/09/2004 DL FTP - 1000KBytes 10 X X X X X YYS201_2



21/09/2004 DL FTP - 1000KBytes 10 X X X X X MSL001_1

21/09/2004 DL FTP - 1000KBytes 10 X X X X X MSL001_121/09/2004 DL FTP - 1000KBytes 10 X X X X X MSL001_1

20/09/2004 UL FTP - 500KBytes X X X Drive test route 1

17/09/2004 UL FTP - 500KBytes 10 X X X X X MTR002_1



20/09/2004 UL FTP - 500KBytes 10 X X X X X YYS201_2



21/09/2004 UL FTP - 500KBytes 10 X X X X X MSL001_1



18/09/2004 MMS - 26KBytes 10 X X X X X MTR002_1

18/09/2004 MMS - 26KBytes 10 X X X X X MTR002_118/09/2004 MMS - 26KBytes 10 X X X X X MTR002_1

20/09/2004 MMS - 26KBytes 10 X X X X X YYS201_2



21/09/2004 MMS - 26KBytes 10 X X X X X MSL001_1





















25/09/2004 UL FTP - 500KBytes 10 X X X X X MSL001_125/09/2004 UL FTP - 500KBytes 10 X X X X X MSL001_1

GPRS - TRX class 1

GPRS - TRX class 2

Test Date Description

Iteratio

n

Test Environment

Radio

Access

Radio

Condition Hopping Type Mobility TRX ClassCell test


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ED

GE

GP

RS

Good

No

rmal

Poor

N

H

B

BH

NH

/RH

Static

Mo

bility

5 4 3 2 1












22/09/2004 DL FTP - 1000KBytes 10 X X X X X MTR002_122/09/2004 DL FTP - 1000KBytes 10 X X X X X MTR002_1












29/09/2004 UL FTP - 500KBytes 10 X X X X X YYS201_229/09/2004 UL FTP - 500KBytes 10 X X X X X YYS201_2


























EDGE - TRX class 2

EDGE - TRX class 3

Test Date Description

Iteration

Test Environment

Radio Radio Hopping Type Mobility TRX Class

Cell test




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EDG

E

GPRS

Good

Normal

Poor

NH

BB

H

NH/RH

Sta

tic

Mob

ility

5 4 3 2 1











01/10/2004 DL FTP - 1000KBytes 10 X X X X X YYS201_201/10/2004 DL FTP - 1000KBytes 10 X X X X X YYS201_2

























24/09/2004 MMS - 26KBytes 10 X X X X X MTR002_124/09/2004 MMS - 26KBytes 10 X X X X X MTR002_1







EDGE - TRX class 4

EDGE - TRX class 5

TRX Class

Cell testTest Date Description

Iteration

Test Environment

Radio Radio Hopping Type Mobility



Table1: EGPRS Schedule


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3 TRIAL RESULT

3.1 End User QoS Test ResultStatic test is performed on 3 cell, which having different frequency hopping type. In

each cell, 3 difference radio conditions are selected for testing, good, normal and

poor radio condition (APPENDIX B). The 3 tested cells are MTR002_1 with frequency

non-hopping type (NH), MSL001_1 with Base band hopping type (BBH) and YYS201_2

with synthesize hopping type (RH/NH).

The test for End User QoS consists of 5 parts:

1. To validate GPRS performance improvement, which brought by new coding

scheme CS3 & CS4 with TRX class 2.

2. To highlight the EGPRS performance on difference TRC class, TRX class 2 to 5.

3. To access the gain with brought by EGPRS mode compare to GPRS.

4. To access the impact of frequency hopping type (NH, BBH, RH/NH) on data

throughput.

5. To access the impact of radio conditions (good, normal, poor) on data

throughput.

3.1.1 GPRS Performance Improvement

To access the GPRS performance of existing BSS, B7 release (TRX class 1) to B8 release

(TRX class 2).

3.1.1.1 FTP: Download data 1000KBytesDownload Throughput per PDCH

7.9

16.2

11.0

18.0

0.0

5.0

10.0

15.0

20.0

GPRS with TRX class1 (B7 release) GPRS with TRX class2 (B8 release)

kbps

Average Download Throughput Max. Download Throughput per PDCH (measued)

Figure3: Download FTP GPRS with TRX class 1

The above figure shows the GPRS performance improvement, which brought by new

coding scheme CS3 & CS4 with TRX class 2 of B8 release. Average 8.3 kbps per PDCH

increase in download throughput during download file 1000KBytes test.




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3.1.1.2 FTP: Upload data 500Kbytes

Upload Throughput per PDCH

9.113.6

10.8

17.8

0.0

5.0

10.0

15.0

20.0

GPRS with TRX class1 (B7 release) GPRS with TRX class2 (B8 release)

kbps

Average Upload Throughput Max. Upload Throughput per PDCH (measued)

Figure4: Upload FTP GPRS with TRX class 1

The above figure shows 4.5 kbps per PDCH has been improved in GPRS service of B8

release with TRX class2.

3.1.2 EDGE Performance (TRX Class 2 to 5)

To validate EDGE performance of each TRX class in term of data throughput.

3.1.2.1 FTP: Download data 1000Kbytes

Download Throughput per PDCH vs TRX Class

19.325.1

40.2 41.4

20.1

26.4

47.850.2

0.0

10.0

20.0

30.0

40.0

50.0

60.0

EGPRS (TRX class 2) EGPRS (TRX class 3) EGPRS (TRX class 4) EGPRS (TRX class 5)

kbps

Average Download Throughput ( measured ) Max. Download Throughput per PDCH(measued)

Figure5: Download FTP EGPRS with TRX class 2 to 5

The above figure shows average download throughput, which measured in 3 cells,

such as MTR002_1, MSL001_1 and YYS201_2. On each cell, 3 different radio conditions

are measured. In good radio condition of MTR002_1, which has no frequency

hopping, given maximum throughput as show in line chart.

In test field conditions, there is no big difference in term of download throughput,

between TRX class 4 and 5, due to maximum modulation coding scheme, MCS9 of

TRX class5, has no protection bit and high sensitive to radio interference.

In TRX class 4 and 5, have big gap between average and maximum download

throughput, due to the high modulation coding scheme, such as MCS8 & MCS9 of

TRX class 4 & 5, has less protection bit and more sensitive to radio interference

compare to lower MCS in TRX class 2 & 3. Only in good radio condition of clean

frequency plan cell, such as non-frequency-hopping cell that can give high

throughput.




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No upload throughput test compare between TRX class 2 to 5, due to maximum

uplink modulation coding scheme, MCS4 (17.6 kbps), is same in any TRX class. So no

upload throughput different is expect on each TRX class.

3.1.3 GPRS and EDGE Comparison

To access the data throughput gain, which brought by EDGE compare to GPRS

radio access technology.

3.1.3.1 FTP: Download data 1000Kbytes

Download Throughput per PDCH

19.325.1

40.2 41.4

7.916.2

11.0

18.0 20.1

26.4

47.8 50.2

0.0

10.0

20.0

30.0

40.0

50.0

60.0

GPRS (TRX class 1) GPRS (TRX class 2) EGPRS (TRX class 2) EGPRS (TRX class 3) EGPRS (TRX class 4) EGPRS (TRX class 5)

k

bps

Average Download Throughput ( measured ) Max. Download Throughput per PDCH(measued)

Figure6: Download FTP Compare between GPRS and EGPRS

3.1.3.2 FTP: Upload data 500Kbytes

Upload Throughput per PDCH

13.9

9.1

13.6

10.8

17.8

15.9

0.0

4.0

8.0

12.0

16.0

20.0

GPRS (TRX class 1) GPRS (TRX class 2) EGPRS (TRX class 2)

kbps

Average Upload Throughput ( measured ) Max. Upload Throughput per PDCH(measued)

Figure7: Upload FTP Compare between GPRS and EGPRS



In theory, GPRS mode with TRX class 2 has maximum uplink RLC throughput 20kbps,while EGPRS with TRX class 2 has maximum uplink RLC throughput only 17.6kbps.

However, in test field conditions, EGPRS give higher average upload and download

throughput compare to GPRS (In download 19.3 > 16.2, and in upload 13.9 > 13.6),

because of the new adaptation MCS mechanism and re-transmission mechanism of

EGPRS has more efficiency compare to GPRS.


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3.1.4 Data Throughput vs Hopping Type

To access the impact of frequency hopping type (NH, BBH, RH/NH), to data

throughput of each TRX class.

Download Throughput per PDCH vs Hopping Type

9.8

8.7

5.1

16.9

14.6

17.1

20.0

18.4

19.4

25.1

25.6

24.5

44.0

42.4

34.3

46.4

42.2

35.6

0.0

10.0

20.0

30.0

40.0

50.0

NH BBH RH/NH

kbps

GPRS (TRX class 1) GPRS (TRX class 2) EGPRS (TRX class 2)EGPRS (TRX class 3) EGPRS (TRX class 4) EGPRS (TRX class 5)

Figure8: Download FTP Hopping Type effect

Upload Throughput per PDCH vs Hopping Type

8.8

9.8

8.6

14.2

13.0

13.6

15.6

13.9

12.3

0.0

2.04.0

6.0

8.0

10.0

12.0

14.0

16.0

18.0

NH BBH RH/NH

kbps


Figure9: Upload FTP Hopping Type effect



On both download and upload direction, non-frequency-hopping cell give better

average throughput. And frequency-hopping type has high impact only on high TRX

class, such as TRX class 4 and class 5.


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3.1.5 Data Throughput vs Radio Condition

To access the impact of radio conditions (good, normal, poor), to data throughput

of each TRX class.

Download Throughput per PDCH vs Radio Condition

9.0

8.3

6.3

17.5

16.5

14.7

19.7

19.2

18.9

26.0

25.4

23.8

44.1

41.1

35.5

47.0

41.8

35.3

0.0

10.0

20.0

30.0

40.0

50.0

Good radio cond Normal radio cond Poor radio cond

kbps

GPRS (TRX class 1) GPRS (TRX class 2) EGPRS (TRX class 2)EGPRS (TRX class 3) EGPRS (TRX class 4) EGPRS (TRX class 5)

Figure10: Download FTP Radio condition effect

Upload Throughput per PDCH vs Radio Condition

9.6

9.2

8.4

14.4

13.3

13.1

14.2

13.8

13.9

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

Good radio cond Normal radio cond Poor radio cond

kbps


Figure11: Upload FTP Radio condition effect

Both download and upload direction, the test at good radio condition give better

average throughput. And radio condition has high impact on high TRX class, such as

TRX class 4 and class 5.




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3.1.6 MMS Test Result

MMS test is performed with Nokia 6220 sending and receiving MMS which attached

26KBytes (onetouchanim.gif) and trace by program TEMS version 5.0.

Remind that Nokia 6220 is offer 3+2 for GPRS mode and 2+1 for EGPRS mode.

Sending & Receiving MMS with 26KBytes attached

18.1 14.819.5 19.9 19.4 19.3

19.018.2

15.3 13.5 13.7 14.5

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0


Tim

e(sec)

Average Sending Time Average Receiving Time

Sending: 1 PDCH

Receiving: 2 PDCHs

Sending: 2 PDCHs

Receiving: 3 PDCHs

Sending & Receiving MMS with 26KBytes attached

18.1 14.819.5 19.9 19.4 19.3

19.018.2

15.3 13.5 13.7 14.5

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0


Tim

e(sec)

Average Sending Time Average Receiving Time

Sending: 1 PDCH

Receiving: 2 PDCHs

Sending: 2 PDCHs

Receiving: 3 PDCHs

Figure12: Sending and Receiving MMS

Sending time of GPRS seem faster than EGPRS because of, in GPRS mode 2 timeslots

is allocated for sending data, and in EGPRS mode has only 1 timeslot, allocated.

In EGPRS mode, no sending time difference between TRX classes, because of all TRX

class in EGPRS mode offer same maximum uplink throughput, maximum modulationcoding scheme is MCS4 (17.6 kbps).

During receiving data, 3 timeslots is allocated for GPRS mode, and 2 timeslots is

allocated for EGPRS mode. In EGPRS mode, no big receiving time difference

between TRX classes, because of the MMS application is small data packet, only

26Kbytes file attached, so data throughput cannot reach the maximum speed.




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The figures below show trace result from TEMS version 5.0, during sending and

receiving MMS in EGPRS mode with TRX class 2 to 5.

Figure13: EGPRS with TRX class2 - ending and Receiving MMS





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Mobility Test

Mobility test is performed in the area that serving by 4 sites.

Cube_Mentiri: MTR002_1 Mangsalut: MSL001_1, MSL001_2, MSL001_3

Tanah_Jambu: TJB001_1, TJB001_2, TJB001_3

Sungai_Hanching: SHC001_1, SHC001_2, SHC001_3

FTP Application, download and upload direction, are use in mobility test. GPRS with

TRX class 1& 2 and EGPRS with TRX class 2 to 5 were test by download file 1000KBytes

continuously on whole route drive test.

Upload direction is test on GPRS mode with TRX class 1 & 2 and EGPRS mode with TRX

class 2 only, due to in theory, maximum modulation coding scheme of EDGE is MCS4

(17.6 kbps) on every TRX class. So no expect different upload throughput ondifference TRX class.

The mobility test is consists of 6 parts.

1. Download and upload FTP test on GPRS mode with TRX class 1

2. Download and upload FTP test on GPRS mode with TRX class 2

3. Download and upload FTP test on EGPRS mode with TRX class 2

4. Download FTP test on EGPRS mode with TRX class 3






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3.1.7 GPRS with TRX Class 1 (B7 release)

Drive test is performed by Nokia 6220, and recorded by software TEMS Investigate

version 5.0. The optimal PDCH of Downlink TBF is 3 PDCHs.

Figure17: GPRS (TRX class1): Downlink coding scheme of mobility test

GPRS (TRX Class 1): Downlink_RLC_Throughput

0

20000

40000

60000

80000

100000

120000

140000

160000

130

124

118

112

106

1009488827670645852464034282216104

kbps

Sampling

Downlink Throughput

Figure18: GPRS (TRX class1): Downlink RLC throughput of mobility test




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GPRS (TRX Class 1): Downlink_RLC_Throughput per PDCH

0

50000

100000

150000200000

250000

300000

130

124

118

112

106

1009488827670645852464034282216104

kbps

Samplin

g

Downlink Throughput

Figure19: GPRS (TRX class1): Downlink RLC throughput per PDCH of mobility test

Average download throughput per PDCH in static test is 7.9 kbps; anyway the

throughput result in static test is throughput in user point of view, not RLC throughput.

The optimal PDCH of Uplink TBF is 2 PDCHs.



Figure20: GPRS (TRX class1): Uplink coding scheme of mobility test


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GPRS (TRX Class 1): Uplink_RLC_Throughput

02000400060008000

1000012000

140001600018000

130

124

118

112

106

1009488827670645852464034282216104

kbps

Samplin

g

Uplink Throughput

Figure21: GPRS (TRX class1): Uplink RLC throughput of mobility test

GPRS (TRX Class 1): Uplink_RLC_Throughput per PDCH

0

5000

10000

15000

20000

25000

30000

130

124

118

112

106

1009488827670645852464034282216104

kbps

Sampling

Uplink Throughput

Figure22: GPRS (TRX class1): Uplink RLC throughput per PDCH of mobility test

Average upload throughput per PDCH in static test is 9.1 kbps; anyway thethroughput result in static test is throughput in user point of view, not RLC throughput.




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3.1.8 GPRS with TRX Class 2 (B8 release)



Figure23: GPRS (TRX class2): Downlink coding scheme of mobility test

GPRS (TRX Class 2): Downlink_RLC_Throughput

0

2000400060008000

1000012000140001600018000

130

124

118

112

106

1009488827670645852464034282216104

kbps

Sampling

Downlink Throughput



Figure24: GPRS (TRX class2): Downlink RLC throughput of mobility test


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GPRS (TRX Class 2): Downlink_RLC_Throughput per PDCH

0

5000

10000

15000

20000

25000

30000

35000

130

124

118

112

106

1009488827670645852464034282216104

kbps

Samplin

g

Downlink Throughput

Figure25: GPRS (TRX class2): Downlink RLC throughput per PDCH of mobility test



The optimal PDCH of Uplink TBF is 2 PDCHs.



Figure26: GPRS (TRX class2): Uplink coding scheme of mobility test


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GPRS (TRX Class 2): Uplink_RLC_Throughput

0

1000

2000

3000

4000

5000

6000

7000

130

124

118

112

106

1009488827670645852464034282216104

kbps

Sampling

Uplink Throughput

Figure27: GPRS (TRX class2): Uplink RLC throughput of mobility test

GPRS (TRX Class 2): Uplink_RLC_Throughput per PDCH

0

5000

10000

15000

20000

130

124

118

112

106

1009488827670645852464034282216104

kbps

Sampling

Uplink Throughput

Figure28: GPRS (TRX class2): Uplink RLC throughput per PDCH of mobility test

Average upload throughput per PDCH in static test is 13.6 kbps; anyway thethroughput result in static test is throughput in user point of view, not RLC throughput.




26/46


3.1.9 EGPRS with TRX Class 2 (B8 release)



Figure29: EGPRS (TRX class2): Downlink coding scheme of mobility test

EGPRS (TRX Class 2): Downlink_RLC_Throughput

0

50001000015000200002500030000350004000045000

130

124

118

112

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1009488827670645852464034282216104

kbps

Sampling

Downlink Throughput



Figure30: EGPRS (TRX class2): Downlink RLC throughput of mobility test


27/46


EGPRS (TRX Class 2): Downlink_RLC_Throughput per PDCH

0

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1009488827670645852464034282216104

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Samplin

g

Downlink Throughput

Figure31: EGPRS (TRX class2): Downlink RLC throughput per PDCH of mobility test



The optimal PDCH of Uplink TBF is only 1 PDCH.



Figure32: EGPRS (TRX class2): Uplink coding scheme of mobility test


28/46


EGPRS (TRX Class 2): Uplink_RLC_Throughput per PDCH

02000400060008000

1000012000

140001600018000

130

124

118

112

106

1009488827670645852464034282216104

kbps

Samplin

g

Uplink Throughput

Figure33: EGPRS (TRX class2): Uplink RLC throughput of mobility test

Average upload throughput per PDCH in static test is 13.9 kbps; anyway the









29/46



0

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Average download throughput per PDCH in static test is 25.1 kbps; anyway thethroughput result in static test is throughput in user point of view, not RLC throughput.




30/46







0

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31/46



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32/46



0

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Sampling

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05000

100001500020000

2500030000350004000045000

130

124

118

112

106

1009488827670645852464034282216104

kbps

Sampling

Downlink Throughput






From the throughput result of static and mobility test, only in TRX class 4 and 5 that

mobility of terminal (Nokia 6220) has impact to data transfer throughput.


33/46


4 GPRS & EGPRS QoS STATISTICS

4.1 TBF Establishment PhaseDL TBF Establishment Success Rate

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60

80

100

120

%

BSS Fail

Gb Fail

Ater Cong.

CPU Cong.

DSP Cong.

Radio Fail

Radio Cong.

Success

% Success

Figure43: Downlink TBF establishment

UL TBF Establishment Success Rate

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200000

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400000

500000

600000

700000

01/09/2004

02/09/2004

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Nb

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20

40

60

80

100

120

%

BSS Fail

Gb Fail

Ater Cong.

CPU Cong.

DSP Cong.

Radio Fail

Radio Cong.

Success% Success

Figure44: Uplink TBF establishment

Most of uplink TBF establishment due to BSS fail, is effect from some cells was sleeping

(100% UL_TBF_est_fail_BSS). Especially on MSL001_3, which have sleeping many times

during 21/09/2004 until 26/09/2004, suspect due to unstable transmission line. Anyway

the correction for sleeping cell (100% UL_TBF_est_fail), lock unlock GPRS is impact on

whole BTS on same GPU, which create GPRS down time around 5 minutes.



On 28/09/2004, 100% uplink TBF establishment fail is occurs on whole cell in same GPU

during 8-11 AM, which impact from GPU problem, after apply TRX pools to the BTS

during 1-4AM on 28/09/2004.


34/46


4.2 TBF Release Phase

Downlink TBF Release

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Nb

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60

70

80

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%

BSS pb

Gb drop

Blocking drop

Stagnat drop

Radio pb

%Normal rel

% Drop

%Accept rel

Figure45: Downlink TBF release

Uplink TBF Release

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40

60

80

100

120

%

BSS pb

Gb drop

Blocking pb

Stagnat pb

Radio pb

%Normal rel

% Drop

%%Accept rel

Figure46: Uplink TBF release

High uplink TBF drop due to radio on 25/09/2004 is impact from SHC001_1, which has

100% uplink TBF drop during 8AM to 10PM on 25/09/2004, before sleeping until 10PM

on 26/09/2004.

4.3 Data Packet Traffic

GPRS DL useful RLC traffic

0

500000

1000000

1500000

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2500000

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Nb

0

20

40

60

80

100

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%

CS4 usef

CS3 usef

CS2 usef

CS1 usef

%io CSx usef

Figure47: GPRS Downlink Traffic




35/46


DL EGPRS useful RLC traffic

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Nb

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%

MCS9 usef

MCS8 usef

MCS7 usef

MCS6 usef

MCS5 usef

MCS4 usef

MCS3 usef

MCS2 usef

MCS1 usef

%ioMCSxusef

%io8PSKusef

Figure48: EGPRS Downlink Traffic

GPRS UL useful RLC traffic

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1000000

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Nb

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20

40

60

80

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%

CS4 usef

CS3 usef

CS2 usef

CS1 usef

%io CSx usef

Figure49: GPRS Uplink Traffic

UL EGPRS useful RLC traffic

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MCS4 usef

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%io MCSx usef

Figure50: EGPRS Uplink Traffic



Tungku_Submarine_Satation BTS was moved to BSC_5_HQ on 23/09/2004, and apply

TRX pool on 28/09/2004. Since 28/09/2004, only 1 cell, TKU001_2, cannot get the CS3,

CS4 or any MCS, no any alarm show at OMC. The problem was solved after push the

data traffic to BCCH TRX (PS_PREF_BCCH_TRX =1, TRX1_PREF_MARK=1). However, this

action on sector 2 is impact to sector1, since that time sector 1, TKU001_1, was

sleeping and then no possible of data traffic on TKU001_1.


36/46


4.4 Data Transfer throughput

Downlink radio throughput per TBF

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kbps Radio kbps

GPRS:kbps

EGPRS:kbps

Figure51: Downlink throughput

Uplink radio throughput per TBF

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EEGPRS:kbps



Figure52: Uplink throughput


37/46


5 CONCLUSION

GPRS performance is improved with TRX class 2 in BSS B8 release. New codingscheme CS3 and CS4 give higher throughput compare to GPRS with TRX class 1 in

BSS B7 release

EGPRS performance is better with higher TRX class. TRX class 5 give highest download

throughput compare to others TRX class. However in field test conditions, there is no

big difference in term of download throughput between TRX class 4 and TRX class 5,

due to maximum modulation coding scheme (MCS9) has no protection bit, so its

high sensitive to radio interference. TRX class 4 is recommended to offer high

throughput performance in commercial network.

EGPRS radio access has many improvement of data throughput compare to GPRSradio access, because of new modulation coding scheme and the re-transmission

mechanism.

Non-frequency-hopping cell give better throughput compare to frequency hopping

cell (BBH, RH/NH). The frequency hopping type and radio condition has high impact

only on high modulation coding scheme, such as MCS8 & MCS9 in TRX class 4 and

TRX class 5.

The mobility of MS has impact to download throughput only in TRX class 4 and 5,

which offer high-speed data transfer.




38/46


APPENDIX A: TRX CLASS

Packet class

of a TRXG4 TRE

Class 0

no packet

Class 1

Simple

Class 2

Double

Class 3

Triple

Class 4

Quad

GPRS: CS 1,2

GPRS: CS 1,2,3,4EDGE UL: MCS 1,2,3,4

EDGE DL: MCS 1,2,3,4,5

GPRS CS 1,2,3,4

EDGE UL: MCS 1,2,3,4

EDGE DL: MCS-1,2,3,4,5,6

GPRS CS-1,2,3,4EDGE UL: MCS 1,2,3,4

EDGE DL: MCS-1,2,3,4,5,6,7,8

SupportedSupported ((ModulationModulation)) Coding schemesCoding schemes

Class 5

Quintuple

GPRS CS 1,2,3,4


EDGE DL: MCS 1,2,3,4,5,6,7,8,9

GPRS: Max. 20 kbps

EDGE UL: Max. 17.6 kbps

EDGE DL: Max. 22.4 kbps

Abis TS per TRX

2

2

4

6

8

10

GPRS: Max. 12 kbps

GPRS: Max. 20 kbps



GPRS: Max. 20 kbps



GPRS: Max. 20 kbps



Packet class

of a TRX

Packet class

of a TRXG4 TREG4 TRE

Class 0

no packet

Class 0

no packet

Class 1

Simple

Class 1

Simple

Class 2

Double

Class 2

Double

Class 3

Triple

Class 3

Triple

Class 4

Quad

Class 4

Quad

GPRS: CS 1,2GPRS: CS 1,2





GPRS CS 1,2,3,4


EDGE DL: MCS-1,2,3,4,5,6

GPRS CS 1,2,3,4


EDGE DL: MCS-1,2,3,4,5,6


EDGE DL: MCS-1,2,3,4,5,6,7,8


EDGE DL: MCS-1,2,3,4,5,6,7,8

SupportedSupported ((ModulationModulation)) Coding schemesCoding schemes

Class 5

Quintuple

Class 5

Quintuple

GPRS CS 1,2,3,4


EDGE DL: MCS 1,2,3,4,5,6,7,8,9

GPRS CS 1,2,3,4


EDGE DL: MCS 1,2,3,4,5,6,7,8,9

GPRS: Max. 20 kbps



Abis TS per TRXAbis TS per TRX

22

22

44

66

88

1010

GPRS: Max. 12 kbps

GPRS: Max. 20 kbps



GPRS: Max. 20 kbps



GPRS: Max. 20 kbps





Figure53: TRX class


39/46

CONFIDENTIAL

RxLev

dBm

Poor - 85T

RxLev

dBm

Poor - 85T

Page 39/46

APPENDIX B: RADIO CONDITION DEFINEOn each cell, 3 different types of radio conditions, based on the DL received level

and theMeanBEP (Bit Error Probability) are defined for static test: Goodradio condition:DL RxLev [-55/-70 dBm] and MeanBEP [31,25] Normal radio condition:DL RxLev [-75/-80 dBm] and MeanBEP [24,15]

Bad radio condition:DL RxLev [-85/-95 dBm] and MeanBEP [14,0]

Good - 65

Normal -75

BEP0 31

T

T

900 MHz

Good - 65

Normal -75

BEP0 31

T

T

900 MHz

Figure54: Radio conditions define for field test




40/46


APPENDIX C: EDGE DESCRIPTION

Definitions

EGPRS (EDGE) is an enhancement of GPRS. The EGPRS concept has been

established for the purpose of enabling the support of data transmission at a bit rate

exceeding the capabilities of GPRS. Basically, EGPRS relies on new modulation and

coding schemes on the air interface allowing for a data throughput optimized with

respect to radio propagation condition (Link Adaptation).

The basic principle of link adaptation is to change the Modulation and Coding

Schemes (MCS) according to the radio conditions. When the radio conditions

worsen, a more protected MCS (more redundancy) is chosen leading to a lower

throughput. On the contrary, when the radio condition become better, a less

protected MCS (less redundancy) is chosen leading to a higher throughput.

Nine modulation and coding schemes are proposed for EGPRS, providing raw RLC

data rates ranging from 8.8 kbps (minimum value per timeslot, under the worst radio

propagation conditions) up to 59.2 kbps (maximum value achievable per timeslot

under the best radio propagation conditions). Data rates above 17.6 kbps require 8-

PSK modulation be used on the air, instead of the regular GMSK.

Scheme Modulation Maximum rate (kbps)

MCS9 8-PSK 59.2MCS8 8-PSK 54.4

MCS7 8-PSK 44.8

MCS6 8-PSK 29.6

MCS5 8-PSK 22.4

MCS4 GMSK 17.6

MCS3 GMSK 14.8

MCS2 GMSK 11.2

MCS1 GMSK 8.8Figure55: Maximum RLC throughput of Modulation Coding Scheme

The choice of the modulation and coding scheme is based on measurements of the

Bit Error Probability (BEP). EGPRS requires new MSs, which support EDGE.

TRX Class Concept



Depending on the used (M)CS, from one and up to five 16 kbps channels is needed

per PDCH between the BTS and the MFS (for example, the 59.2 kbps theoretical

throughput per PDCH with MCS9 cannot be carried by a single 16 kbps channel on

the Abis/Ater interfaces). Therefore, each TRX has a TRX class (from one to five),

which defines the number of Abis/Ater GCH per radio TS or PDCH. One PDCH on aclass n TRX uses n GCH (1 EGCH = n 16 kbps channels = n GCH) on the Abis and Ater

interfaces. In each cell the operator defines the number of TRX of each TRX class.


41/46


The table below indicates the available CS and MCS depending on the TRX class.

TRX class Available CS Available MCS

1 CS1 to CS2 MCS1 to MCS2




5 CS1 to CS4 MCS1 to MCS9Figure56: Maximum RLC throughput of Coding Scheme




42/46


6 APPENDIX D: RADIO PARAMETERS



GPRS/EGPRS configuration

Logical name Definition Type Range Value Instance

TRX_PREF_MARK Preference mark assigned to a TRX to favour ordisfavour CS radio resource allocations on a TRX.

Number 0 to 7 0 TRX

.

GPRS/EGPRS radio resources


MAX_PDCHMaximum number of slave and master PDCHs that can

be established in the cell.Number 0 to 127 80% of TCH Cell

MIN_PDCHMinimum number of master and slave PDCHs that are

always allocated to the MFS.Number 0 to 127 1 Cell

MAX_PDCH_PER_TBFMaximum number of PDCH allocated to a single

(E)GPRS connectionNumber 1 to 5 5 Cell

1) In case of GPRS TBF establishment, this parameterdefines the number of TBFs (GPRS + EGPRS) that can

be established on one slave PDCH, before requesting a

new PDCH to the BSC.

Number 1 to 5 1 Cell

2) In case of EGPRS TBF establishment, this parameter

defines the number of EGPRS TBFs that can be

established on one slave PDCH, before requesting a

new PDCH to the BSC.

MAX_DL_TBF_SPDCHMaximum number of DownLink (E)GPRS connections

per Slave PDCH.Number 1 to 10 1 Cell

MAX_UL_TBF_SPDCHMaximum number of UpLink (E)GPRS connections per

slave PDCH.Number 1 to 6 1 Cell

EN_FAST_INITIAL_GPRS_ACCESS

This flag indicates whether or not one Slave PDCH for

(E)GPRS traffic usage will be statically established in

the cell.

Flag true-false TRUE Cell

EN_DYN_PDCH_ADAPTATIONEnables/disables the enhanced GPRS traffic adaptation

to cell load variation.Flag true-false TRUE BSS

EN_RES_REALLOCATION Enabling / disabling of the resource reallocation feature. Number 0 to 15 1 BSS


ACCESS_BURST_TYPE Format of the access burst used by MS Flag 8 bits or 11 bits 8 bits cell

BEP_PERIODFilter constant for EGPRS channel quality

measurements.Number 1 to 25 10 cell

EN_AUTONOMOUS_REROUTINGThis flag enables / disables autonomous rerouting of DL

LLC PDUs.Flag 0 to 1 1 MFS

EN_DL_LLC_PDU_REROUTING This flag enables / disables rerouting of DL LLC PDUs. Flag 0 to 1 1 BSS

EN_EGPRS Enables/Disables EGPRS traffic in the cell. Flag true-false False* cell

EN_OUTGOING_GPRS_REDIRIndicates whether or not outgoing GPRS redirections

are systematically triggered from the serving cell.Flag true-false FALSE cell

MAX_EGPRS_MCSMaximum Modulation and Coding Scheme used for

EGPRS traffic in the cell.Number MCS1 to MCS9 MCS-5* cell

MAX_GPRS_CS Maximum coding scheme used for GPRS traffic in thecell.

Number 2 to 4 CS-2* cell

NB_TS_MPDCH (BSC)Number of radio timeslots reserved for the primary and

secondary master PDCHs defined in the cell.Number 0 to 4 0 cell

NC_REPORTING_PERIOD_TReporting period of NC measurements reported by the

MS while in packet transfer mode.Number 0.48 to 61.44 0.96 Cell

NC2_DEACTIVATION_MODE

NC2 deactivation mode. This parameter defines

whether or not the Packet Measurement Order

message with a Reset Command is sent at the end of a

packet transfer.

Number 0 to 1 0 Cell

NETWORK_CONTROL_ORDERThis parameter defines whether the MS or the BSS

controls the cell reselections.Number 0 to 4 0 Cell

NETWORK_OPERATION_MODEThis parameter defines the CS-PS co-ordination for

paging.Number 1 to 3 2 BSS

PS_PREF_BCCH_TRXIndicates whether or not the PS requests shall be

preferentially served with PDCH(s) of the BCCH TRXFlag 0 or 1 0 cell

T_DL_EGPRS_MeasReportTime period to request for an EGPRS Packet Downlink

Ack/Nack with measurements.

Timer 60 to 3000ms 200ms cell

T_NETWORK_RESPONSE_TIMEMaximum expected response time of a network server

as seen from the MFS.Timer 0 to 5000 1600 BSS

N_TBF_PER_SPDCH

EGPRS activation / TBF handling

0: PS/CS TRX: This TRX can carry PS and CS traffic and has the lowest preference in the TCH sub-channel selection process used to serve a CS call.

1: CS TRX with preference mark 1: This TRX can carry only CS traffic and has the preference mark 1 in the TCH sub-channel selection process used to

serve a CS call.


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TBF_DL_INIT_CS

Value of the downlink coding scheme when the link

adaptation algorithm is disabled or initial value of the

coding scheme otherwise.

Number CS1 to CS4 CS-2* cell

TBF_DL_INIT_MCS

Value of the downlink coding scheme when the link



Number MCS1 to MCS9 MCS-5* cell

TBF_UL_INIT_CS

Value of the uplink coding scheme when the link



Number CS1 to CS4 CS-2* cell

TBF_UL_INIT_MCS

Value of the uplink coding scheme when the link



Number MCS1 to MCS4 MCS-4* cell

TX_EFFICIENCY_ACK_THRThreshold below which the TBF is released because of a

bad transmission efficiency in acknowledged mode.Percentage 0 to 100 10 Cell

* Parameters that changed during trial step


CS_QUAL_DL_1_2_FH_ACK

RXQUAL threshold used in the link adaptation

algorithms to change the Coding Scheme from CS1 to

CS2 in the downlink direction when the RLC mode is

acknowledged and the TBF is established on a hopping

TRX.

Threshold 0 to 7 6 BSS

CS_QUAL_DL_1_2_FH_NACK




unacknowledged and the TBF is established on a

hopping TRX.


CS_QUAL_DL_1_2_NFH_ACK




acknowledged and the TBF is established on a non-

ho in TRX.


CS_QUAL_DL_1_2_NFH_NACK




unacknowledged and the TBF is established on a non-

ho in TRX.


CS_QUAL_UL_1_2_FH_ACK



CS2 in the uplink direction when the RLC mode is


TRX.


CS_QUAL_UL_1_2_FH_NACK





ho in TRX.


CS_QUAL_UL_1_2_NFH_ACK





hopping TRX.


CS_QUAL_UL_1_2_NFH_NACK


algorithms to change the Coding Scheme from CS1 toCS2 in the uplink direction when the RLC mode is


hopping TRX.



Threshold used in the link adaptation algorithms to

change the Coding Scheme from CS2 to CS3 in the

uplink direction when the RLC mode is acknowledged

and the TBF is established on a hopping TRX.





downlink direction when the RLC mode is


TRX.


Coding scheme and radio link control




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Threshold 0 to 7 0.5 BSS






TRX.


CS_QUAL_UL_3_4_FH_NACK



uplink direction when the RLC mode is unacknowledged



CS_QUAL_DL_3_4_FH_NACK





hopping TRX.


CS_QUAL_UL_3_4_NFH_ACK




and the TBF is established on a non-hopping TRX.


CS_QUAL_DL_3_4_NFH_ACK





ho in TRX.


CS_QUAL_UL_3_4_NFH_NACK



uplink direction when the RLC mode is unacknowledged

and the TBF is established on a non-hopping TRX.


CS_QUAL_DL_3_4_NFH_NACK


change the Coding Scheme from CS3 to CS4 in thedownlink direction when the RLC mode is


ho in TRX.


CS_SIR_DL_3_4_FH_ACK

Signal to Interference Ratio threshold used in the link

adaptation algorithms to change the Coding Scheme

from CS3 to CS4 in the downlink direction when the

RLC mode is acknowledged and the TBF is established

on a hopping TRX.


CS_SIR_DL_3_4_FH_NACK




RLC mode is unacknowledged and the TBF is

established on a hopping TRX.


CS_SIR_DL_3_4_NFH_ACK




RLC mode is acknowledged and the TBF is establishedon a non-ho in TRX.


CS_SIR_DL_3_4_NFH_NACK




RLC mode is unacknowledged and the TBF is

established on a non-hopping TRX.


CS_SIR_HST_DL

Signal to Interference Ratio hysteresis used in the link


from CS4 to CS3 in the downlink direction.

Number 0 to 15 1 BSS

EN_IREnables/Disables Incremental redundancy for the

downlink TBF in the cell.Flag False /True TRUE BSS

E_TX_EFFICIENCY_PERIODNumber of received radio blocks for an EGPRS TBF

after which E_TX_EFFICIENCY is computed.Number 0 to 500 100 BSS




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TBF_CS_DL

For a monos ot TBF aone on its PDCH, t res o

defining the number of consecutive Packet Downlink

Ack/Nack not received above which the coding scheme

of a downlink acknowledged or unacknowledged TBF is

changed to CS1 (only in downlink). For a multi-slot TBF

or a TBF which shares its PDCH(s), the limit is

proportional to the instantaneous bandwidth allocated

to the TBF.


TBF_CS_UL

Threshold defining the maximum number of

consecutive times the network receives an invalid UL

RLC data block or nothing from the MS having a

monoslot GPRS TBF before changing the coding

scheme to CS1. For a multislot GPRS TBF,

TBF CS UL limit := TBF CS UL x n allocated


TBF_MCS_DL

For a monos ot TBF aone on its PDCH, t res o

defining the number of consecutive EGPRS Packet

Downlink Ack/Nack not received above which the

coding scheme of a downlink acknowledged or

unacknowledged TBF is changed to MCS1 (only in

downlink). For a multi-slot TBF or a TBF which shares

its PDCH, the limit is proportional to the allocated

bandwidth at the TBF establisment.


TBF_MCS_UL

Threshold defining the maximum number of

consecutive times the network receives an invalid UL

RLC data block or nothing from the MS having a

monoslot EGPRS TBF before changing the coding

scheme to MCS1. For a multislot EGPRS TBF,

TBF_MCS_UL_limit := TBF_MCS_UL x

n allocated timeslots.


Figure57: Radio parameters

Parameters changed during test

GPRS

TRX Class MAX_GPRS_CS TBF_DL_INIT_CS TBF_UL_INIT_CSClass 1 CS2 CS2 CS2

Class 2 CS4 CS3 CS3

Class 3

Class 4

Class 5

EN_EGPRS = Enable

TRX Class MAX_EGPRS_MCS TBF_DL_INIT_MCS TBF_UL_INIT_MCS

Class 1Class 2 MCS5 MCS5 MCS4

Class 3 MCS6 MCS6 MCS4



Figure58: Changed parameters




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END OF REPORT

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DST EDGE Trial'2004 Report