Basic Parameters, Counters and KPIs - xa.yimg.com · PDF fileThe parameters in the WCDMA RAN ... not necessarily the best or the recommended setting by Ericsson. 2.1 Power Control

Rev A

Basic Parameters, Counters and KPIs


Rev A 2007-11-01 Ericsson AB 2007

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Contents

1 INTRODUCTION........................................................................................................................................................... 3

2 PARAMETERS............................................................................................................................................................... 3

2.1 POWER CONTROL.................................................................................................................................................... 3 2.2 HANDOVER .............................................................................................................................................................. 5 2.3 CHANNEL SWITCHING............................................................................................................................................. 7 2.4 CAPACITY MANAGEMENT....................................................................................................................................... 8

2.4.1 Admission Control ............................................................................................................................................... 8 2.4.2 Congestion Control............................................................................................................................................ 11

2.5 HSDPA .................................................................................................................................................................. 13 2.6 IDLE MODE ............................................................................................................................................................ 15

3 COUNTERS .................................................................................................................................................................. 16

3.1 ACCESSIBILITY ...................................................................................................................................................... 16 3.2 RETAINABILITY....................................................................................................................................................... 17 3.3 INTEGRITY .............................................................................................................................................................. 18 3.4 MOBILITY ............................................................................................................................................................... 19 3.5 AVAILABILITY ........................................................................................................................................................ 20 3.6 SYSTEM UTILIZATION ............................................................................................................................................. 21

4 KEY PERFORMANCE INDICATORS (KPIS) ........................................................................................................ 22

4.1 CS VOICE ACCESSIBILITY ....................................................................................................................................... 24 4.2 CS VIDEO ACCESSIBILITY....................................................................................................................................... 24 4.3 CS VOICE CALL SETUP TIME .................................................................................................................................. 25 4.4 INTER-RADIO ACCESS TECHNOLOGY CELL CHANGE KPIS ..................................................................................... 25 4.5 HS IRAT CELL CHANGE SUCCESS RATE ................................................................................................................ 26 4.6 PS ACCESSIBILITY.................................................................................................................................................. 26 4.7 CS VOICE DROP CALL RATE (DCR/DOR).............................................................................................................. 27 4.8 CS VIDEO DROP CALL RATE (DCR/DOR) ............................................................................................................. 28 4.9 PS SESSION DROP RATE (SDR).............................................................................................................................. 29 4.10 CS VOICE QUALITY DL BLER ............................................................................................................................... 30 4.11 CS VIDEO QUALITY BLER ..................................................................................................................................... 30 4.12 PS DL/UL CURRENT APPLICATION THROUGHPUT (KBPS) ...................................................................................... 31 4.13 HS DL/UL CURRENT APPLICATION THROUGHPUT (KBPS)...................................................................................... 32 4.14 PING SUCCESS RATE ............................................................................................................................................... 33



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1 INTRODUCTION This document presents information about basic KPI’s (Key Performance Indicators), RNC Parameters and some Counters for WCDMA radio network revision P5 of Ericsson implementation, and intends to facilitate and reduce the time spent for searching this information through databases and serve as a quick guide for learners and beginners. Each part has a little introduction and then lists the information, with a little description and formulas or default values.

2 Parameters The parameters in the WCDMA RAN serve, basically, to provide control and set the way the radio network works, such as enabling RABs, setting the time triggers and thresholds, setting the power control and availability of channels. Be aware that each network can have a different setting, and the default values are not necessarily the best or the recommended setting by Ericsson.

2.1 Power Control

Parameter Default Value Description

primaryCpichPower 270 (27 dBm) Power to be used for transmitting the PCPICH.

bchPower -31 (-3.1 dB) BCH power is the power to be used for transmitting on the BCH, relative to the primaryCpichPower value.

primarySchPower -18 (-1.8 dB) Primary SCH power, relative to the primaryCpichPower value. Old name: schPower1

secondarySchPower -35 (-3.5 dB) Secondary SCH power, relative to the primaryCpichPower value. Old name: schPower2

aichPower -6 (dB) AICH power, to be used for transmitting on AICH, relative to the primaryCpichPower value. The value range is set in a short term to cover both the RRC and NBAP spec.



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maxFach1Power 18 (1.8 dB) Maximum power, to be used for transmitting the first FACH channel, relative the primaryCpichPower value. The first FACH is used for logical channels BCCH, CCCH and DCCH, control signaling.

pchPower -4 (-0.4 dB) Maximum power to be used for transmitting the PCH, relative to the primaryCpichPower value.

pichPower -7 (dB) PICH power is the power to be used for transmitting on the physical channel carrying the paging indicators, relative to the primaryCpichPower value.

constantValueCprach -27 (dB) Constant value used by the UE to calculate the initial power on PRACH according to the Open loop power control procedure.

powerOffsetP0 3 (dB) Power step when no acquisition indicator is received.

powerOffsetPpm -4 (dB) Power step between preamble and the message part.

preambleRetransMax 8 (# preambles) Maximum number of preambles in one preamble ramping cycle.

maxPreambleCycle 4 (# cycles) Maximum number of preamble ramping cycle.

dlInitSirTarget 41 (4.1 dB) Required DL Initial SIR target for all RABs.

cBackoff 0 (dB) The purpose of this constant is to back off the open loop power control estimate to a conservative starting point.

ecNoPcpichDefault -16 (dB) The default value to be used in power calculations for Ec divided by No.

initShoPowerParam 0 (dB) Correction of initial downlink power at soft handover RL setup.

dlPcMethod 3 (Balancing) Selects the DL power control method at establishment of the radio connection.

ulInitSirTargetHigh 82 (8.2 dB) Required UL Initial SIR target for the RAB having minimum SF equal to or lower than 16.

ulInitSirTargetLow 49 (4.9 dB) Required UL Initial SIR target for the RAB having minimum SF equal to or higher than 32.

ulInitSirTargetSrb 57 (5.7 dB) Required UL Initial SIR target for stand alone SRB.

cPO 0 (dB) A constant parameter to set the UL DPCCH power offset to a conservative level.

ulOuterLoopRegulator Jump Regulation type for uplink outer loop power control algorithm.

sirMin -82 (-8.2 dB) The minimum allowed SIR target.

sirMax 173 (17.3) The maximum allowed SIR target.

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2.2 Handover


reportingRange1a 6 (3 dB) Used by UE functions for intra-frequency measurement reporting (in CELL_DCH). Threshold used for addition-window in evaluation criteria for event type 1a.

reportingRange1b 10 (5 dB) Used by UE functions for intra-frequency measurement reporting (in CELL_DCH). Threshold used for dropwindow in evaluation criteria for event 1b.

timeToTrigger1a 9 (200 ms) Time in milliseconds (ms) between detection of event 1a and sending of the measurement report. Used by UE functions for intra-frequency measurement reporting in CELL_DCH

timeToTrigger1b 9 (200 ms) Time in milliseconds (ms) between detection of event 1b and sending of the measurement report. Used by UE functions for intra-frequency measurement reporting in CELL_DCH

timeToTrigger1c 9 (200 ms) Time in milliseconds (ms) between detection of event 1c and sending of the measurement report. Used by UE functions for intra-frequency measurement reporting in CELL_DCH.

timeToTrigger1d 14 (2560 ms) Time in milliseconds (ms) between detection of event 1d and sending of the measurement report.

hysteresis1a 0 (dB) Hysteresis used in addition-window in evaluation criteria for event 1a to avoid ping pong effects. Used by UE functions for intra-frequency measurement reporting in CELL_DCH.

hysteresis1b 0 (dB) Hysteresis used in the drop window in evaluation criteria for event type 1b. Used by UE functions for intra-frequency measurement reporting in CELL_DCH.

hysteresis1c 2 (1 dB) Used by UE functions for intra-frequency measurement reporting (in CELL_DCH). Hysteresis used in replacement threshold in evaluation criteria for event 1c to avoid ping pong effects.

hysteresis1d 15 (7.5 dB) Used by UE functions for intra-frequency measurement reporting (in CELL_DCH). Hysteresis used in dropwindow in evaluation criteria for event type 1d.



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individualOffset 0 (dB) Used in UE function event-reporting. This offset is added to the measured quantity before the UE evaluates if an event has occurred. The parameter is used both for signaling over RRC and RNSAP.

maxActiveSet 3 Maximum number of cells in active set. This attribute also controls the reporting deactivation threshold, used to control intra-frequency measurements (event 1a). Reporting deactivation threshold = maxActiveSet-1. The attribute also controls the replacement activation threshold, used to control intra-frequency measurements (event 1c). Replacement activation threshold = maxActiveSet.

usedFreqThresh2dEcno -11 (dB) Threshold for event 2d for the used frequency when the measurement quantity is Ec/No.

usedFreqThresh2dRscp -103 (dBm) Threshold for event 2d for the used frequency when the measurement quantity is RSCP.

usedFreqRelThresh2fEcno 2 (dB) Relative threshold for event 2f vs. event 2d for the used frequency when the measurement quantity is Ec/No.

usedFreqRelThresh2fRscp 2 (dB) Relative threshold for event 2f vs. event 2d for the used frequency when the measurement quantity is RSCP.

timeToTrigger3a 6 (100 ms) Time in milliseconds (ms) between detection of event 3a and sending of the measurement report.

hysteresis2d 0 (dB) Hysteresis for event 2d.

hysteresis2f 0 (dB) Hysteresis for event 2f.

hysteresis3a 0 (dB) Hysteresis for event 3a.

gsmThresh3a -104 (dBm) Threshold for event 3a for GSM. Range is valid for GSM carrier RSSI.



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2.3 Channel Switching


ulRlcBufUpswitch 256 (bytes) Uplink threshold for channel switching from FACH/RACH to dedicated channel.

dlRlcBufUpswitch 500 (bytes) Downlink threshold for channel switching from FACH/RACH to dedicated channel.

upswitchPwrMargin 6 (3 dB) Upswitch (DCH to DCH) power margin.

upswitchTimer 10 (1 s) Time during which the DL throughput should be higher than threshold, defined by bandwidthMargin, before an upswitch is issued.

coverageTimer 10 (1 s) Time during which the power is allowed to be high before a downswitch (DCH to DCH) is issued.

downswitchPwrMargin 2 (1 dB) Margin, in relation to maximum allowed code power, which indicates a high power usage.

reportHysteresis 6 (3 dB) Reporting hysteresis for the code power measurements in the node B.

downswitchTimerThreshold 0 (kbps) Timer threshold to achieve hysteresis for channel switching from dedicated channel to FACH/RACH This value should always be greater than or equal to the value of downswitchThreshold.

downswitchThreshold 0 (kbps) Threshold for channel switching from dedicated channel to FACH/RACH. This value should always be less than or equal to the value of downswitchTimerThreshold.

downswitchTimer 10 (s) Timer for channel switching from dedicated channel to FACH/RACH

downswitchTimerUp 60 (30 s) Time, not including data transmission, after which the packet part of the multi RAB "UDI+8/8" (Cs Data 64 kbps + Packet 8kbps) is released. If this parameter is set to 0, the packet part of the connection will not be released due to PS inactivity.



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ulRlcBufUpswitchMrab 8 (kbps) Uplink threshold of the RLC buffer load, used to issue an upswitch request (from "Speech + PS 0/0" to "Speech + PS 64/64").

dlRlcBufUpswitchMrab 0 (kbps) Downlink threshold of the RLC buffer load, used to issue an upswitch request (from "Speech + PS 0/0" to "Speech + PS 64/64"). 0 is used to indicate that the dlRlcBufUpswitchMrab is not in use.

inactivityTimer 30 (s) Time not including data transmission, after which UTRAN will send IU RELEASE REQUEST message to the CN for UEs in state CELL_FACH.

hsdschInactivityTimer 10 (s) Timer for sending of IU RELEASE REQUEST message to the CN for UE connections in RAB state PS Interactive 64/HS - HS-DSCH. The value 7200 seconds is used only for testing purposes.

2.4 Capacity Management

2.4.1 Admission Control


dlCodeAdm 70 (%) Admission limit used for admission based on DL channelization code tree usage (percentage of the tree in use). The following expression MUST be true: dlCodeAdm >= beMarginDlCode * 5

beMarginDlCode 2 (10%) Admission margin for DL code utilization in DL (non-handover, non-compressed mode RLs only). The following expression MUST be true: beMarginDlCode * 5 <= dlCodeAdm

sf8Adm 8 Admission policy for admission on the number of Spreading Factor = 8 (traffic class=non-guaranteed, setup type=<all>) simultaneous connections in a cell in DL (SF histogram). Default setting is to disable the admission policy.



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compModeAdm 15 (# RL) Admission limit for #RL in compressed mode in a cell

sf16gAdm 16 Maximum number of radio links with Spreading Factor (SF) =16 in DL for which new guaranteed admission requests will continue to be allowed. Reaching or exceeding this number of radio links (any service class) using DL SF = 16 will block setup/adding any more guaranteed service class radio links requiring additional DL SF=16 for this cell. 16 means that no blocking of DL SF=16 requests will occur.

sf4AdmUl 0 Admission limit (traffic class = non-guaranteed/guaranteed-hs, admission class = handover or other) for number of radio links with UL SF = 4.

pwrAdm 75 (%) Admission limit for admission on DL cell carrier power. The following expressions MUST be true: pwrAdm + pwrAdmOffset + pwrOffset <= 100% pwrAdm >= beMarginDlPwr

pwrAdmOffset 10 (%) Relative admission limit on DL cell carrier power. The following expression MUST be true: pwrAdm+pwrAdmOffset+pwrOffset <= 100%

beMarginDlPwr 10 (%) Admission margin for DL power usage (non-guaranteed requests) The following expression MUST be true: beMarginDlPwr <= pwrAdm

maximumTransmissionPower 370 (37 dBm) Maximum transmission power is maximum power for all downlink channels added together, that is allowed to be used simultaneously in a cell

minPwrMax 0 (dB) Minimum relative power for maximum power mapping. minPwrRl <= minPwrMax. minPwrMax <= interPwrMax <= maxPwrMax



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interPwrMax 38 (3.8 dB) Intermediate relative power for maximum power mapping. minPwrMax <= interPwrMax <= maxPwrMax

maxPwrMax 48 (4.8 dB) Maximum relative power for maximum power mapping. minPwrMax <= interPwrMax <= maxPwrMax

minimumRate 1590 (15.9 kbps) Minimum rate for maximum power mapping. minimumRate <= interRate <= maxRate.

interRate 7760 (77.6 kbps) Intermediate rate for maximum power mapping. minimumRate <= interRate <= maxRate

maxRate 40690 (406.9 kbps)

Maximum rate for maximum power mapping. minimumRate <= interRate <= maxRate

beMarginAseUl 20 Relative admission limit for admission on ASE for non-guaranteed bitrate calls (traffic class 'background' or 'interactive') in UL. The following expression MUST be true: beMarginAseUl <= aseUlAdm

aseUlAdm 160 Admission limit for admission on ASE in UL. The following expression MUST be true: aseUlAdm >= beMarginAseUl

aseUlAdmOffset 40 Relative admission limit for admission on ASE in UL.

beMarginAseDl 100 Relative admission limit for admission on ASE for non-guaranteed bitrate calls (traffic class 'background' or 'interactive') in DL. The following expression MUST be true: beMarginAseDl <= aseDlAdm

aseDlAdm 240 Admission limit for admission on max capacity (ASE level) in DL. The following expression MUST be true: aseDlAdm >= beMarginAseDl



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ulHwAdm 70 (%) Admission limit on RBS UL HW resource utilisation applicable to non-handover guaranteed admission requests. This parameter is also used together with beMarginUlHw for non-handover non-guaranteed admission requests. the UL HW admission policy. ulHwAdm >= beMarginUlHw

dlHwAdm 70 (%) Admission limit on RBS DL HW resource utilisation applicable to non-handover guaranteed admission requests. This parameter is also used together with beMarginDlHw for non-handover non-guaranteed admission requests. dlHwAdm >= beMarginDlHw

2.4.2 Congestion Control


pwrAdm 75 (%) Admission limit for admission on DL cell carrier power. The following expressions MUST be true: pwrAdm + pwrAdmOffset + pwrOffset <= 100% pwrAdm >= beMarginDlPwr

pwrAdmOffset 10 (%) Relative admission limit on DL cell carrier power. The following expression MUST be true: pwrAdm+pwrAdmOffset+pwrOffset <= 100%

pwrOffset 5 (%) Used by Congestion Control. The following expression MUST be true: pwrAdm+pwrAdmOffset+pwrOffset <= 100%

pwrHyst 300 (ms) Hysterese time setting for detection of congestion in the DL transmitted carrier power. Default setting is to avoid false DL cell congestion detection.



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iFCong 621 (-49.9 dBm) Threshold at which UL congestion is detected in the cell. Default setting is to disable UL congestion measurements, in order to prevent problems during upgrading. The following expression MUST be true: IFCong + IFOffset <= 621

iFOffset 0 (dB) Offset that, together with parameter iFCong, determines the RTWP measurement level at which UL congestion is to be resolved. Default setting is to disable UL congestion measurements, in order to prevent problems during upgrading. The following expression MUST be true: IFCong + IFOffset <= 621

iFHyst 6000 (ms) Hysterese time setting for detection of congestion in the UL RTWP in a cell. Default setting is to disable UL congestion measurements, in order to prevent problems during upgrading

releaseAseDl 1 Amount of ASE in DL to be released with each periodic congestion resolve action targeting guaranteed traffic class connections in a cell. Default setting is a reference case

releaseAseDlNg 3 Amount of ASE in DL to be released with each periodic congestion resolve action targeting non-guaranteed traffic class connections in a cell. Default setting is a reference case setting

tmCongAction 2000 (ms) Interval between periodic congestion resolve actions on guaranteed traffic class connections in a cell. Default setting is a reference case setting

tmCongActionNg 800 (ms) Interval between periodic congestion resolve actions on non-guaranteed traffic class connections in a cell. Default setting is a reference case setting

tmInitialG 3000 (ms) Minimum time before congestion resolve actions are initiated on guaranteed traffic class connections in a cell (after detection of DL cell congestion). Default setting is a reference case setting tmInitialG >= tmInitialGhs



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tmInitialGhs 500 (ms) Minimum time before congestion resolve actions are initiated on guaranteed-hs traffic class connections in a cell (after detection of DL cell congestion). tmInitialGhs <= tmInitialG

releaseAseDlGhs 0 Amount of ASE in DL to be released with each periodic congestion resolve action targeting guaranteed-hs traffic class connections in a cell.

tmCongActionGhs 300 (ms) Interval betwen periodic congestion resolve actions on guaranteed-hs traffic class connections in a cell.

2.5 HSDPA


queueSelectAlgorithm ROUND_ROBIN Specifies the scheduling algorithm used in the cell. Possible values: • EQUAL_RATE • MAXIMUM_CQI • PROPORTIONAL_FAIR_HIGH • PROPORTIONAL_FAIR_LOW • PROPORTIONAL_FAIR_MEDIUM • ROUND_ROBIN

hsCellChangeAllowed FALSE Overall On/Off switch for serving HS-DSCH cell change

hsHysteresis1d 10 Sets the Event 1D hysteresis value specific for HS connections

hsTimeToTrigger1d 640 Sets the Event 1D Time to Trigger value specific for HS connections

HsQualityEstimate CPICH_RSCP Indicates whether it is CPICH Ec/N0 or CPICH RSCP that should be used for indicating "best cell" for HS-DSCH cell selection and HS-DSCH cell change

dlCodeAdm 80 Admission limit used for admission based on DL channelization code tree usage (percentage of the tree in use). he following expression MUST be true: dlCodeAdm >= beMarginDlCode * 5



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sf4AdmUl 0 Admission limit (traffic class = non-guaranteed/guaranteed-hs, admission class = handover or other) for number of radio links with UL SF = 4.

hsdpaUsersAdm 10 Admission limit for the number of users assigned to the HS-PDSCH/HS-SCCH in the cell. This limit is applicable both to HSDPA RAB setup and to channel switching.

releaseAseDlNg 3 Amount of ASE in DL to be released with each periodic congestion resolve action targeting non-guaranteed traffic class connections in a cell. Default setting is a reference case setting

releaseAseDlGhs 0 Amount of ASE in DL to be released with each periodic congestion resolve action targeting guaranteed-hs traffic class connections in a cell.

releaseAseDl 1 Amount of ASE in DL to be released with each periodic congestion resolve action targeting guaranteed traffic class connections in a cell. Default setting is a reference case setting



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2.6 Idle Mode


interFreqFDDMeasIndicator FALSE Inter-frequency FDD measurement indicator.

qQualMin 100 Used in UE functions for cell selection/reselection in idle mode and connected mode. Minimum required (acceptable) quality level in the cell (dB). Used to set cell border between two cells. 100 : Indicates that the minimum quality level has not been specified by the operator.

qRxLevMin 100 Used in UE functions for cell selection/reselection in idle mode and connected mode. Minimum required (acceptable) RX level in the cell. (dBm). 100 : Indicates that the minimum Rx level has not been specified by the operator.

maxTxPowerUL 100 The maximum UE transmission power on the RACH when accessing the system. Used in UE functions for cell selection/reselection in idle mode and connected mode. Also used by UTRAN to control the maximum TX power level an UE may use. 100 : Default value

qOffset1sn 7 Signal strength offset between source and target cells.

qOffset2sn 0 Signal strength offset between source and target cells.



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3 Counters Counters are mechanisms to measure the radio network performance, collecting and storing statistics from the network elements, to be used to detect problem areas or to monitor network behavior daily to facilitate the future growth and optimization. Some counters may depend of functionalities available in the network. The performance statistics are generated from the radio and the transport network live traffic, and data comprises a number of counters predefined by the operator.

3.1 Accessibility

Counter Description

pmTotNoRrcConnectReqCsSucc Total number of Successful Conversational Call (originating and terminating) and Emergency Call RRC Connection attempt

pmTotNoRrcConnectReqCs Total number of Conversational Call RRC Connection attempts (originating and terminating) and Emergency Call RRC Connection attempts

pmNoRabEstablishAttemptSpeech Number of RAB establishments attempts (Speech) referred to the Best Cell in the Active Set.

pmNoRabEstablishSuccessSpeech Number of successful RAB establishments (Speech) referred to the Best Cell in the Active Set.

pmNoLoadSharingRrcConn Number of Load Sharing diversions when establishing an RRC connection

CS

pmNoDirRetryAtt Number of attempted outgoing inter-RAT handover to GSM due to capacity reasons.

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pmTotNoRrcConnectReqPsSucc Total number of Successful 'Originating

Interactive Call', 'Terminating Interactive Call', 'Originating Background Call', 'Terminating Background Call', or 'Originating Subscribed Traffic Call' RRC connection setups.

pmTotNoRrcConnectReqPs Total number of 'Originating Interactive Call', 'Terminating Interactive Call', 'Originating Background Call', 'Terminating Background Call' or 'Originating Subscribed Traffic Call', RRC connection attempts.

pmNoRabEstablishSuccessPacketInteractive The number of successful RAB establishments for PS Interactive RAB mapped on E-DCH/HSDPA

PS

pmNoRabEstablishAttemptPacketInteractive The number of attempted RAB establishments for PS Interactive RAB mapped on HS-DSCH.

3.2 Retainability

Counter Description

pmNoSystemRabReleaseSpeech Number of system speech RAB releases over Iur (that is, releases of a drifting speech call), referred to the IurLink representing the DRNC for the best cell in the active set.

Speech

pmNoNormalRabReleaseSpeech Number of successful normal RAB releases (Speech) referred to the Best Cell in the Active Set.

pmNoSystemRabReleasePacket Number of successful system RAB releases (PS Streaming) referred to the Best Cell in the Active Set.

PS

pmNoNormalRabReleasePacket Number of normal PS streaming RAB (all rates) releases over Iur (that is, normal releases of a drifting PS stremaing call), referred to the IurLink representing the DRNC for the best cell in the active set.

pmNoSystemRbReleaseHs Number of successful system releases of packet RABs mapped on HS-DSCH in the Serving HS-DSCH cell.

HSDPA

pmNoNormalRbReleaseHs Number of successful normal releases of packet RABs mapped on HS-DSCH in the Serving HS-DSCH cell.



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3.3 Integrity

Counter Description

pmFailedDchChSwitch Number of failed channel switches between dedicated channels except to/from PS 128/128. Stepped for the best cell in the active set, if this cell belongs to the SRNC.

pmFailedChSwitch Number of failed channel type switches (that is, between CELL_DCH and CELL_FACH) except to/from PS 128/128. Stepped for the best cell in the active set, if this cell belongs to the SRNC.

pmChSwitchFachDch Number of attempted switches from Packet Switch-RACH/FACH to Packet Switch-64/64

pmChSwitchDch64Fach Number of attempted switches from one packet data RAB with 64 Kbps data rate on DCH to common channel (cell_DCH-64/64 and Cell_FACH state) throughput-based attempts.

pmChSwitchDch128Fach Number of attempted switches from a RAB with 128 Kbps data rate on DCH to common channel (cell_DCH-64/128 and Cell_FACH state), throughput-based attempts

pmChSwitchDch384Fach Number of attempted switches from one packet data RAB with 384 Kbps data rate on DCH to common channel (cell_DCH-64/384 and Cell_FACH state), throughput-based attempts .

pmChSwitchP384P128 Number of attempted switches from a RAB with 384 Kbps data rate on DCH to a RAB with 128 Kbps data rate on DCH, based on DL transmitted code power measurements or throughput.

pmChSwitchP128P64 Number of attempted switches from a RAB with 128 Kbps data rate on DCH to a RAB with 64 Kbps data rate on DCH, based on DL transmitted code power measurements or throughput.

pmChSwitchP128P384 Number of attempted switches from a RAB with 128 Kbps data rate on DCH to a RAB with 384 Kbps data rate on DCH, counted after admission and throughput-based attempts.

pmChSwitchP64P128 Number of attempted switches from a RAB with 64 Kbps data rate on DCH to a RAB with 128 Kbps data rate on DCH, based on throughput measurements.



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3.4 Mobility

Counter Description

pmNoCellUpdAttempt Total number of attempted cell update procedures (periodic and cell reselection, RRC Cell Update message received with Cell Update Cause = Cell Reselection or Periodic Cell Update)

pmNoCellUpdSuccess Total number of successful cell updates (periodic and cell reselection, RNC Cell Update procedure for Cell Reselection or Periodic Cell Update completed successfully.

pmNoTimesCellFailAddToActSet Number of times a cell fails to be added to an active set, also increased at failure at RL replace

pmNoTimesRlAddToActSet Number of times an RL is added to an active set, also increased at RL replace

pmNoSuccessOutIratHoSpeech Number of successful outgoing (to GSM) inter-RAT handover for 'Conversational speech RAB' for the best cell in the active set.

pmNoAttOutIratHoSpeech Number of attempted outgoing (to GSM) inter-RAT handover for 'Conversational speech RAB' for the best cell in the active set.

pmNoFailOutIratHoSpeechUeRejection Number of failed outgoing (to GSM) inter-RAT handover, rejected by UE, for 'Conversational speech RAB' for the best cell in the active set.

pmNoOutIratCcReturnOldCh Total number of the PS Inter-RATCC attempts for UE on DCH where the UE returns to old channel.

pmNoOutIratCcAtt Total number of the PS Inter-RATCC attempts on DCH.

pmNoFailOutIratHoSpeechReturnOldChPhyChFail Number of failed outgoing (to GSM) inter-RAT handover due to physical channel failure, where the UE returns to the present Active Set for 'Conversational speech RAB' for the best cell in the active set.



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3.5 Availability

Counter Description

pmCellDowntimeAuto The length of time during which a cell is unavailable for service because, due to a fault, the system has set a cell or channel state to disabled and the cell and/or channel Administration state = unlocked.

pmCellDowntimeMan The length of time during which a cell is unavailable for service because of Administration state being set to manual lock.

pmHsDowntimeAuto Amount of time the Hsdsch service in the cell is unavailable due to that the system has considered the cell as down, for example, at least one of the MOs Hsdsch, UtranCell, Pch, Rach or Fach is disabled while all are unlocked.

pmHsDowntimeMan Amount of time the Hsdsch service in the cell is unavailable due to operation setting, for example, the operator has locked at least one of the MOs Hsdsch, UtranCell, Pch, Rach or Fach.



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3.6 System Utilization

Counter Description

pmDlDchTrafficVolumeBeforeSplit Traffic volume DL in Kb on dedicated channels (DCHs) (measured before diversity splitting).

pmDlFachTrafficVolume Traffic volume DL in Kb on common channels (FACH).

pmUlDchTrafficVolumeAfterComb Traffic volume UL in Kb on DCHs (measured after diversity combination).

pmUlRachTrafficVolume Traffic volume UL in Kb on common channels (RACH).

pmSumOfSampAseDl Total ASE DL (sum of all sample values recorded)

pmSumOfSampAseUl Total ASE UL (sum of all sample values recorded)

pmNoOfSampAseDl Number of samples of Air interface Speech Equivalents (ASE) DL

pmNoOfSampAseUl Number of samples of ASE UL



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4 Key Performance Indicators (KPIs) KPIs (Key Performance Indicators) are metrics obtained from calculations with counters and are an important part of the performance statistics. The target KPIs are usually fixed by the operator, and should differ for each phase of implementation of a network. The implementation of WCDMA850 for AMX in Nicaragua has the following target KPIs:



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KPI Target Indoor Sites Target Outdoor Sites

Voice Call Setup Success Rate * >= 98% >= 97%

CS Conversational –Video Call Setup Success Rate

>= 98% >= 97%

Video Call Setup Elapsed Time of M to M < 20s > 95% > 95%

Inter RAT HO Success Rate (3G to 2G) >=98% >=97%

Inter RAT HO Success Rate (2G to 3G) >=98% >=97%

Voice Call Drop Rate * <= 1.5% <= 2%

CS Conversational - Video Call Drop Rate * <= 1.5% <= 2%

Voice Call BLER (uplink and downlink) * <= 1.5% <= 2%

CS Conversational - Video Call BLER (uplink and downlink)

<= 1.5% <= 2%

DL WCDMA User Throughput > 360kbps > 350kbps

UL WCDMA User Throughput > 360kbps > 350kbps

DL HSDPA User Throughput > 85% Max** > 70% Max**

UL HSUPA User Throughput > 85% Max > 70% Max

PS RAB Establishment Success * >98% >97%

PS RAB Drop* <1.5% <2%

Multi-RAB Performance

AMR Voice Call setup Success Rate during HSPA Call

>98% >97%

AMR Voice Call setup Success Rate during Interactive 64/64 call

>98% >97%

HSPA Call setup Success Rate during AMR Voice Call

>98% >98%

Interactive 64/64 Setup Success Rate during AMR Voice call

>98% >97%

Ping Tests (32 Bytes)

95% percentile for WCDMA RAB < 150ms < 160ms

95% percentile for HSPA < 65 ms < 70 ms

SMS

SMS Success Rate > 98% > 95%

SMS Delivery Time < 40s > 95% > 90%

WAP

WAP Failure Rate < 2% < 5%

WAP Session Establishment Elapsed Time < 13s > 95% > 90% MMS

MMS Success Rate > 98% > 95%

MMS Delivery Time < 40s > 95% > 90%

WCDMA Target KPIs for AMX - Nicaragua



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4.1 CS Voice Accessibility The following formula is used to derive this drive test based KPI: # Access Attempts = # Call Start Messages + # Blocked Call Events Accessibility = # Blocked Call Events / # Access Attempts Example

Number Call Setups 148

Number Blocked Calls 5

Accessibility 96.73%

4.2 CS Video Accessibility CS Video Accessibility is defined as the ratio of access failures relative to all access attempts. This is currently identified by the following events:

• Call Attempt Message = "RRC Connection Request"

• Call Attempt Event = “Call Attempt” and/or “Call Attempt Retry”

• Call Start Message = "Alerting"

• Call Start Events = “Call Setup”

• Access Failures

o Blocked Call Event1 = "Blocked Call"

o Blocked Call Event2 = "RRC Connection Abnormal Release. Blocked Call"

o Blocked Call Event3 = “RRC Connection Reject. Blocked Call”

o Blocked Call Event4 = “Blocked Call. Call Initialization”

o Blocked Call Event5 = “Blocked Call. Call Initiation”

The following formula is used to derive this drive test based KPI:



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# Access Attempts = # Call Start Messages + # Blocked Call Events Accessibility = # Blocked Call Events / # Access Attempts Example

Number Call Setups 148



4.3 CS Voice Call Setup Time Voice call setup time indicates the network response time to a user for a voice service. Voice Call setup time = Time (Call Start Message) – Time (Call Attempt Message) Example

Average Call Setup Time (s) 03.06

95th Percentile Call Setup Time (s) 07.77

4.4 Inter-Radio Access Technology Cell Change KPIs IRAT Cell Change Events are flagged when the following messages are detected:

• UMTS -> GSM IRAT Attempt = "Cell Change Order From UTRAN Command-GSM”

• UMTS -> GSM IRAT Success = "Routing Area Update Accept"

• GSM -> UMTS IRAT Attempt = "RRC Connection Request"

• GSM -> UMTS IRAT Success = "Routing Area Update Accept"



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4.5 HS IRAT Cell Change Success Rate HS IRAT Cell Change Success Rate is defined as the ratio of cell change successes to cell change attempts: HS IRAT Cell Change Success Rate = # IRAT Success / # IRAT Attempts

4.6 PS Accessibility PS Accessibility is defined as the ratio of access failures relative to all access attempts. This is currently identified by the following events:

• Access Attempt Message = "RRC Connection Request "

• Access Success Message = "Activate PDP Context Accept"

• Access Failure Event = " PDP Context Activation Failure"

The following formula is used to derive this drive test based KPI: # Access Attempts = # Access Success Messages + # Access Failure Events Accessibility = # Access Failure Events / # Access Attempts [4] Example

Number Call Establishments 26





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4.7 CS Voice Drop Call Rate (DCR/DOR) CS Voice Drop Call Rate is defined as the ratio of abnormal speech disconnections relative to all speech connections. This is currently identified by the events:

• Normal Call Connections

o “Call Established”

o “Call Setup. Call Established”

• Normal Call Disconnection = “Call End”

• Abnormal Call Disconnections (Dropped Calls)

o “Dropped Call”

o “RRC Connection Abnormal Release. Dropped Call”

The following formula is used to derive this drive test based KPI: CS Voice Drop Rate = #Abnormal Call Disconnections / #Normal Call Connections Example:

Number of Call Establishments 148

Number of Dropped Calls 1

Actual Dropout Rate 0.7%



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4.8 CS Video Drop Call Rate (DCR/DOR) CS Video Drop Call Rate is defined as the ratio of abnormal video disconnections relative to all speech connections. This is currently identified by the following events:

• Normal Call Connections

o “Call Established”


• Normal Call Disconnection = “Call End”

• Abnormal Call Disconnections (Dropped Calls)

o “Dropped Call”


The following formula is used P to derive this drive test based KPI: CS Video Drop Rate = #Abnormal Call Disconnections / #Normal Call Connections Example:

Number of Call Establishments 148

Number of Dropped Calls 1

Actual Dropout Rate 0.7%



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4.9 PS Session Drop Rate (SDR) PS Session Drop Rate is defined as the ratio of abnormal PSD disconnections relative to all PSD disconnections (both normal and abnormal). PS Drop Rate shall be measured after the start of the ftp download. A PS data session shall be considered as dropped when ftp session is abnormally disconnected without completing a file transfer due to any reason. User intervention (manual abortion) is marked as a normal session end. This is currently identified by the following events:

• Normal Session Connection = “Session Start”

• Normal Session Disconnection

o “Session End”

o “Session aborted by user”

• Abnormal Session Disconnections (Dropped Sessions)

o “Session Error”


The following formula is used to derive this drive test based KPI: PS Session Drop Rate = #Abnormal Session Disconnections / #Normal Session Connections Example:

PS Results

Number of Session Starts 26

Number of Session Drops 6



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4.10 CS Voice Quality DL BLER The drive test based DL BLER value shall be collected from the UE during a call The DL BLER measurements are recorded from the time when the “Connect” message is received until the time when the call terminates normally or abnormally. # BLER Measurements Average DL BLER % Example

Number BLER Measurements 8013

Average BLER 0.46%

Percentile BLER 2.30%

4.11 CS Video Quality BLER The drive test based BLER value shall be collected from the UE during a call. The DL BLER measurements are recorded from the time when the “Connect” message is received until the time when the call terminates normally or abnormally. The following events and information elements are used to define Video BLER:

• Call Start Events

o "Call Established"


• Call End Event = "Call End"

• Call Drop/Abnormal Release

o Drop Event1 = "Dropped Call"

o Drop Event2 = "RRC Connection Abnormal Release. Dropped Call"



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The following statistics are provided for DL BLER:

• # BLER Measurements

• Average DL BLER %

• Percentile DL BLER %

Example

Number BLER Measurements 8013

Average BLER 0.46%

Percentile BLER 2.30%

4.12 PS DL/UL Current Application Throughput (kbps) This KPI represents the Current Application Throughput from UE while is in an FTP session. The DL/UL current throughput measurements are recorded from the “Session Start” event is detected until the time when the session terminates normally or abnormally. The following events and information elements are used to define dedicated mode:

• Session Start Event = "Session Start"

• Session End Event

o "Session End"

o “Session Aborted by User”

• Session Drop/Abnormal Release

o Drop Event1 = "Session Error"


The following statistics are provided for DL/UL Current Throughput:

• Session Mean Throughput (kbit/s)

• Session Percentile Throughput

• Session Max Throughput (kbit/s)



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Example

DL UL

Session Mean Throughput (kbit/s) 293.7 0.0

Session Percentile Throughput (kbit/s) 385.4 0.0

Session Max Throughput (kbit/s) 414.6 0.3

4.13 HS DL/UL Current Application Throughput (kbps) This KPI represents the Current Application Throughput while the UE is in an FTP session. The DL/UL current throughput measurements are recorded from the time when the “Session Start” event is detected until the time when the session terminates normally or abnormally. The following events and information elements are used to define dedicated mode and the correct Transport Channel ID:

• Session Start Event = "Session Start"

• Session End Event = "Session End"




Example

DL UL

Session Mean Throughput (kbit/s) 293.7 0.0

Session Percentile Throughput (kbit/s) 385.4 0.0

Session Max Throughput (kbit/s) 414.6 0.3



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4.14 Ping Success Rate This KPI shows the number of successful ping responses during the test. The following events and information elements are used to define sessions and pings. Only pings within a session are recorded.

• Session Start Event = "Session Start" and Eventinfo = “Ping”

• Session End Event = "Session End"




• Successful Ping Event = "Ping Response. Ping Success"

• Failed Ping Event = "Ping Response. Ping Timeout”

Ping Success Rate = # Successful Ping Events / # Failed Ping Events Example in Ping output sheet

Data Latency Results

from idle from Active

Ping Responses 1 12999

Ping Timeouts 0 0

Ping Success Rate 100.00% 100.00%

Documents

Basic Parameters, Counters and KPIs - xa.yimg.com · PDF fileThe parameters in the WCDMA RAN ... not necessarily the best or the recommended setting by Ericsson. 2.1 Power Control