3 g kpi ericsson

Radio Network KPIWCDMA RAN

User Description

Copyright

© Copyright Ericsson AB 2008. All rights reserved.

Disclaimer

No part of this document may be reproduced in any form without the writtenpermission of the copyright owner.

The contents of this document are subject to revision without notice due tocontinued progress in methodology, design and manufacturing. Ericsson shallhave no liability for any error or damage of any kind resulting from the useof this document.

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Contents

Contents

1 Introduction 1

1.1 Scope 1

1.2 Target Groups 1

1.3 Revision Information 2

2 Capabilities 3

3 Radio Network KPI 5

3.1 Introduction 53.1.1 Observability in Ericsson UTRAN 53.1.2 Quality of Service 63.1.3 RAN Performance Observability Model 6

3.2 Definitions and Explanations 7

3.3 Key Performance Indicators (KPI) 83.3.1 Accessibility 83.3.2 Retainability 143.3.3 Call Completion Success Rate (CCSR) 233.3.4 Integrity 243.3.5 System Utilization 293.3.6 Mobility 413.3.7 Availability 53

4 Glossary 59

5 Appendix A 61

5.1 Channel element utilization report in OSS 615.1.1 Formulas for Channel Element Utilization DL 615.1.2 Formulas for Channel Element Utilization UL 62

5.2 Channel element blocking report in OSS 635.2.1 Formulas for RRC blocking due to lack of channel elements 635.2.2 Formulas for RAB blocking due to lack of channel elements 64

Reference List 65

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Introduction

1 Introduction

This user description presents the Key Performance Indicators (KPI) forWCDMA RAN for the purpose of measuring the subscriber perceived quality.These quality metrics are divided into six areas: Accessibility, Retainability,Integrity, Utilization, Mobility, and Availability.

1.1 Scope

This document describes the Performance Statistics functionality in theWCDMA RAN. It explains the Radio Network Formulae.

Note: The description of the statistics counters is not given in this document.It can be found in the node CPI Reference [1], Reference [2], Reference[4] and Reference [5].

1.2 Target Groups

This document is written for the following group of personnel: engineers workingwith mobile network optimization, operation and maintenance personnel andmanagement.

It is assumed that users of this document are familiar with the basic conceptsand principles of the Ericsson WCDMA Systems. Basic knowledge of RadioNetwork functions is recommended.

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1.3 Revision Information

Table 1 Revision History

Revision Reason for Revision P7.0/P7.1

E • Accessibility formulas Figure 5 on page 9 , Figure 6on page 9, Figure 7 on page 10, Figure 8 on page10, Figure 9 on page 11, Figure 13 on page 12,Figure 14 on page 12, Figure 15 on page 13 andFigure 16 on page 13 are updated to include NASSignalling.

• Retainability formulas for Packet-SwitchedInteractive DCH (Figure 36 on page 20) and HS(Figure 37 on page 20) added.

• Mobility formula for Inter Radio Access Technology(GSM) Handover Success Rate for speech isupdated to include Load Based handover Figure125 on page 47.

P7.1

E • System Utilization formula for speech, Figure 78 onpage 32, updated to give correct code utilization forthe rates 5.9 and 4.75.

• SRB drop formulas Figure 42 on page 22 andFigure 43 on page 22 corrected.

Both

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Capabilities

2 Capabilities

Monitoring the RAN performance is a very important task for different categoriesof users, such as operation and maintenance personnel, network engineers,and management.

The Radio network KPI can be used for the following tasks:

• Rapidly detecting unacceptable performance in the network, enabling theoperator to take immediate actions to preserve the quality of the network

• Troubleshooting on cell clusters of interest

• Monitoring and optimizing the radio network performance to have a bettersubscriber-perceived quality or a better use of the installed resources

• Providing radio network planners with the detailed information needed forthe dimensioning and configuration of the network for optimal use

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3 Radio Network KPI

3.1 Introduction

This chapter provides, the Key Performance Indicators (KPI) for WCDMA RAN.These quality metrics are divided into six areas: Accessibility, Retainability,Integrity, Utilization, Mobility, and Availability.

3.1.1 Observability in Ericsson UTRAN

Observability covers all functions in UTRAN that serves to monitor and analyzethe performance and characteristics of the UTRAN system. This can be doneon various levels with different target groups and requirements. The figurebelow illustrates a model for observability in UTRAN.

Key Perfomance Indicator (KPI) levelEnd-user

Perception

Procedure level

Performance Indicator (PI) level

SystemCharacteristics

U0000544A

Figure 1 UTRAN observability model

The model shows different levels of observability targeting different purposes:

• The Key Performance Indicators represents the End-user perceptionof a network on a macro level and are of typical interest for top-levelmanagement as well as others within an operator. These numbers aretypically used to benchmark networks against each other and to detectareas of problem. The KPIs are mainly calculated from PM counters basedon well defined RANAP and RRC procedures. The reliability, granularityand accuracy of this data are critical and data is collected continuously.

• The Performance Indicators level represents information on a system levelthat does not explicitly qualifies in the macro level end-user perspectivemodel, but can indicate whether the system performs good or bad.

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Performance Indicators do not necessarily give enough details to allow afull detailed troubleshooting. The data can also be used for planning anddimensioning. This data, typically PM counters and also RES counters, iscollected continuously.

• The Procedure level represents deeper troubleshooting and measuresystem characteristics measurements. It involves measurement onsignalling and procedure/function levels to investigate problems detectedon higher levels. The amount of data on this level is enormous and thesemeasurements are generally user-initiated for a specific purpose and areaof the network, thereby limiting the scope of the measurements. The typicalsource for this data is GPEH events and the recording functions UETRand CTR.

3.1.2 Quality of Service

ITU-T has described a general model for Quality-of-Service from an end-userperspective to be used in telecom networks. The three main categories are:

• Accessibility – The ability of a service to be obtained, within specifiedtolerances and other given conditions, when requested by the user. It isthe percentage of call attempts made by the end-user that are successful.Call setup failures can be blocked calls due to lack of network resources onvarious levels, for example Transmission Network, Channel Elements, DLPower and so on, or other reason that prevented a successful call setup,for example radio link problem, signaling failure and so on.

• Retainability – The probability that a service, once obtained, will continueto be provided under given conditions for a given time duration. Thepercentage of the successfully call setups that were retained during thewhole conversation (session) and terminated by the user. The standardKPI for retainability is the Dropped Call Rate. On cell level it is defined asthe number of dropped calls in the cell divided by the total number of callsterminated (by end-user or dropped) in the cell.

• Integrity – The degree to which a service is provided without excessiveimpairments, once obtained The Service Integrity represents the qualityexperienced by the user during the call or session. This is very difficult tomeasure from a system point-of-view and rough measures have to be used,based on RBS and UE measurements. BLER is used as an indicationof the service integrity for CS services, but do not show the qualityexperienced by the end-user. For PS services are BLER and throughputused as service quality indicators.

3.1.3 RAN Performance Observability Model

The RAN Performance Observability model used by Ericsson is describedbelow.

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The three ITU-T areas Accessibility, Retainability and Integrity arecomplemented with Mobility, Utilization and Availability. These are the mainsix areas for performance monitoring on macro or KPI level of an UTRANnetwork and should be fulfilled by counters in PM. The statistics will be givenper service when applicable.

• Mobility – Shows the handover performance divided into Intra-Frequency,Inter-frequency and IRAT HO for CS and PS services.

• Utilization – Describes the network utilization by means of Traffic level andCapacity Management (congestion, admission/load control). Informationrequired as input to network planning.

• Availability – Shows In-Service-Performance for the main Managed Objects(MO) in UTRAN. Monitoring system downtime is important for comparingequipment from different system vendors and to understand reasons fortemporary network problems.

3.2 Definitions and Explanations

In the following sections, the majority of the equations are written per UtranCell.The user may choose to aggregate the counters over a group of cells and usethe same equations to calculate the KPI over a cluster of cells, one RNC, ormultiple RNCs. Basically, the user should replace pmXYZ(UtranCell) with

GroupUtranCell

nCell)pmXYZ(Utrap)pmXYZ(Grou

in each equation to get the metric over a larger area.

The same aggregation can be performed over time. Each counter is reportedevery 15 minutes. The user may choose to aggregate them over an hour,24 hours, or as the user wishes. In that case, the user can replace thepmXYZ(UtranCell) with its time aggregated sum.

Remark:In the Section 3.3.5 on page 29, the formulae are given on UtranCelllevel. To calculate the traffic on higher levels, for example RNC, the result mustbe calculated by sum of the traffic per cell.

Where a formula, Figure 2 on page 7, involves the sum of fractions, the resultof the formula will indicate an invalid result where the results of all fractionsinvolved are invalid. Where the result of less than all fractions involved in theformula are invalid, the invalid fractions will be ignored. The formula will presentthe result based on the fractions that yield a valid result.

pmFpmE

pmDpmC

pmBpmA

Formula

Figure 2 Formula example

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The result of Formula will present an invalid result where the result ofpmA/pmB, pmC/pmD and pmE/pmF are invalid.

The result of Formula will be pmC/pmD + pmE/pmF where the result ofpmA/pmB is invalid

3.3 Key Performance Indicators (KPI)

3.3.1 Accessibility

In the following equations, RRC connection attempts are notcorrected for redirections due to emergency calls. The counterpmNoOfRedirectedEmergencyCalls can be used to estimate the percentageof emergency call redirections on RNC level. To consider redirections due tointer-frequency load sharing, when the functionality is enabled, an example ofequation is given in Figure 7 on page 10. A correction is then made to eliminateduplicated CS RRC connection attempts resulting from load sharing redirectionorders. An equivalent formula can be defined to calculate all services.

Due to the fact that UE may perform cell re-selection during RRC Connection, itmay repeat RRC Connection Request message N300 times which may arriveat different cell, and the fact that WCDMA RAN does not double count theduplicated RRC Connection Request message, there is a chance that accesssuccess rate for some cells may show larger than 100% success rate. Theaccess success rate of better than 100% happens when the attempt registeredat different cell than where the success registered. The end result is slightlylarger success rate for the cell that completes the access and a slightly lesssuccess rate for the cell that starts the access.

The two first formulas below for Iu signalling success rate can be calculatedon RNC level only and they can be added to PS and CS Accessibility formulason RNC level to include also the signalling set-up success rate to the totalAccessibility.

3.3.1.1 CS signaling setup success rate

CS signaling setup success rate is given by

)()(%100)(__

nRncFunctiotemptCsstablishAtpmNoIuSigEnRncFunctioccessCsstablishSupmNoIuSigE

nRncFunctioSigSetupACS

Figure 3 CS signaling setup success rate

3.3.1.2 PS signaling setup success rate

PS signaling setup success rate is given by

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)()(%100)(__

nRncFunctiotemptPsstablishAtpmNoIuSigEnRncFunctioccessPsstablishSupmNoIuSigE

nRncFunctioSigSetupAPS

Figure 4 PS signaling setup success rate

3.3.1.3 Circuit-Switched (CS) Speech Accessibility

Accessibility success rate per UtranCell for speech is given by

)()(

)(Re)(Re)(Re

)(ReRe

%100)(_

UtranCellmptSpeechablishAttepmNoRabEstUtranCellessSpeechablishSuccpmNoRabEst

UtranCellleaseCsNasSignpmNoSystemUtranCellleaseCsNasSignpmNoNormalUtranCellleaseCsNasSignpmNoNormal

UtranCellqCsConnectpmTotNoRrcranCell)qCsSucc(UtConnectpmTotNoRrc

UtranCellASp

Figure 5 Circuit-Switched (CS) Speech Accessibility

Note: The NAS Signaling part of the formula is only applicable for P7.1.

where directed-retry is counted as access failure and inter-frequency loadsharing is not considered.

Alternatively, one can exclude directed-retry to GSM from the RABestablishment attempt, if aggregated to RNC level, so that it is not counted asaccess failure on WCDMA RAN. The following equation can then be used.

)()()(

)()()(

)()(

%100)(_

RNCetryAttpmNoDirRRNCmptSpeechablishAttepmNoRabEstRNCessSpeechablishSuccpmNoRabEst

RNCeleaseCsNasSignRpmNoSystemRNCeleaseCsNasSignRpmNoNormalRNCeleaseCsNasSignRpmNoNormal

RNCeqCsConnectRpmTotNoRrcRNCeqCsSuccConnectRpmTotNoRrc

RNCASp

Figure 6 Circuit-Switched (CS) Speech Accessibility, directed-retry excluded

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As a third possibility, the following equation can be used when RRC accessesare subject to inter-frequency load sharing redirections:

)()(

)(Re)(Re)(Re

)()(Re)(Re

%100)(_

UtranCellmptSpeechablishAttepmNoRabEstUtranCellessSpeechablishSuccpmNoRabEst


UtranCellnnCsaringRrcCopmNoLoadShUtranCellqCsConnectpmTotNoRrcUtranCellqCsSuccConnectpmTotNoRrc

UtranCellASp

Figure 7 Circuit-Switched (CS) Speech Accessibility, load sharing excluded


3.3.1.4 Circuit-Switched 64 Accessibility

Accessibility success rate per UtranCell for CS 64 is given by

)(64)(64

)(Re)(Re)(Re

)(Re)(Re

%100)(_64

UtranCellmptCsablishAttepmNoRabEstUtranCellessCsablishSuccpmNoRabEst


UtranCellqCsConnectpmTotNoRrcUtranCellqCsSuccConnectpmTotNoRrc

UtranCellACS

Figure 8 Circuit-Switched 64 Accessibility


3.3.1.5 Circuit-Switched Streaming (CS 57) Accessibility

Accessibility success rate per UtranCell for CS streaming is given by

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)(57)(57

)(Re)(Re)(Re

)(Re)(Re

%100)(_57

UtranCellmptCsablishAttepmNoRabEstUtranCellessCsablishSuccpmNoRabEst


UtranCellqCsConnectpmTotNoRrcUtranCellqCsSuccConnectpmTotNoRrc

UtranCellACS

Figure 9 Circuit-Switched Streaming (CS 57) Accessibility


3.3.1.6 Packet-Switched (PS) Streaming 64 Accessibility

Accessibility success rate per UtranCell for PS streaming 64 is given by

)UtranCell(treammptPacketSablishAttepmNoRabEst)UtranCell(treamessPacketSablishSuccpmNoRabEst

%)UtranCell(A_PStr 10064

Figure 10 Packet-Switched (PS) Streaming 64 Accessibility

3.3.1.7 Packet-Switched (PS) Streaming 128 Accessibility

Accessibility success rate per UtranCell for PS streaming 128 is given by

)UtranCell(treammptPacketSablishAttepmNoRabEst)UtranCell(treamessPacketSablishSuccpmNoRabEst

%)UtranCell(A_PStr

128128

100128

Figure 11 Packet-Switched (PS) Streaming 128 Accessibility

3.3.1.8 Packet-Switched (PS) Streaming HS Accessibility

Accessibility success rate per UtranCell for PS streaming HS is given by

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)UtranCell(treamHsAttemptPsSpmNoRabEst)UtranCell(treamHsSuccessPsSpmNoRabest

%)UtranCell(A_PStrHS 100

Figure 12 Packet Switched (PS) Streaming HS Accessibility

3.3.1.9 Packet-Switched (PS) Data Interactive Accessibility

Accessibility success rate per UtranCell for all PS interactive services is given by

)()(

)(Re)(Re)(Re

)(Re)(Re

%100)(_

UtranCellnteractivemptPacketIablishAttepmNoRabEstUtranCellnteractiveessPacketIablishSuccpmNoRabEst

UtranCellleasePsNasSignpmNoSystemUtranCellleasePsNasSignpmNoNormalUtranCellleasePsNasSignpmNoNormal

UtranCellqPsConnectpmTotNoRrcUtranCellqPsSuccConnectpmTotNoRrc

UtranCellAPInt

Figure 13 Packet-Switched (PS) Data Interactive Accessibility


3.3.1.10 Packet-Switched (PS) Data Interactive DCH/FACH Accessibility

Accessibility success rate per UtranCell for PS interactive DCH/FACH is givenby

)()(

)(Re)(Re)(Re

)(Re)(Re

%100)(__

UtranCellntNonHsAttemptPsIpmNoRabEstUtranCellntNonHsSuccessPsIpmNoRabEst

UtranCellleasePsNasSignpmNoSystemUtranCellleasePsNasSignpmNoNormalUtranCellleasePsNasSignpmNoNormal

UtranCellqPsConnectpmTotNoRrcUtranCellqPsSuccConnectpmTotNoRrc

UtranCellADCHPInt

Figure 14 Packet-Switched (PS) Data Interactive DCH/FACH Accessibility

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3.3.1.11 Packet-Switched (PS) Data Interactive HS Accessibility

Accessibility success rate per UtranCell for PS interactive HS is given by

)()(

)()()(

)()(

%100)(__

UtranCellHsnteractivemptPacketIablishAttepmNoRabEstUtranCellHsnteractiveessPacketIablishSuccpmNoRabEst

UtranCelleleasePsNasSignRpmNoSystemUtranCelleleasePsNasSignRpmNoNormalUtranCelleleasePsNasSignRpmNoNormal

UtranCelleqPsConnectRpmTotNoRrcUtranCelleqPsSuccConnectRpmTotNoRrc

UtranCellAHSPInt

Figure 15 Packet-Switched (PS) Data Interactive HS Accessibility

Note: If the HS cell is on a separate frequency then the RRC contributionto the formula might be small or even zero, depending on parametersettings. The NAS Signaling part of the formula is only applicable forP7.1.

3.3.1.12 Packet-Switched (PS) Data Interactive EUL Accessibility

Accessibility success rate per UtranCell for PS interactive EUL is given by

)()(

)()()(

)()(

%100)(__

UtranCellEulnteractivemptPacketIablishAttepmNoRabEstUtranCellEulnteractiveessPacketIablishSuccpmNoRabEst

UtranCelleleasePsNasSignRpmNoSystemUtranCelleleasePsNasSignRpmNoNormalUtranCelleleasePsNasSignRpmNoNormal

UtranCelleqPsConnectRpmTotNoRrcUtranCelleqPsSuccConnectRpmTotNoRrc

UtranCellAEULPInt

Figure 16 Packet-Switched (PS) Data Interactive EUL Accessibility

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Note: If the EUL cell is on a separate frequency then the RRC contributionto the formula might be small or even zero, depending on parametersettings. The NAS Signaling part of the formula is only applicable forP7.1.

3.3.1.13 MBMS PTM Session Start Success Rate

MBMS Session Start Success Rate rate per UtranCell for MBMS PTM is givenby

)MbmsCch(ontMbmsSessipmNoAttemp)MbmsCch(onsMbmsSessipmNoSucces

%)MbmsCch(A_PTM_MBMS 100

Figure 17 MBMS PTM session start success rate

3.3.1.14 Grade of Service for Circuit-Switched (CS) Speech

This metric could be used to explain one of the reasons behind access failure.The blocking rate for speech calls per UtranCell due to RN admission blocking,TN congestion or TN failure is given by the equations in Section 3.3.5.27 onpage 38.

3.3.1.15 Grade of Service for Circuit-Switched (CS) 64 and 57

This metric could be used to explain one of the reasons behind accessfailure. The blocking rate for both CS 64 and 57 calls per UtranCell due to RNadmission blocking, TN congestion or TN failure is given by the equation inSection 3.3.5.28 on page 39.

3.3.1.16 Grade of Service for Packet-Switched Interactive

This metric could be used to explain one of the reasons behind access failure.The blocking rate for PS interactive calls per UtranCell due to RN admissionblocking, TN congestion or TN failure is given by the equation in Section3.3.5.29 on page 40.

3.3.1.17 Grade of Service for Packet-Switched Streaming

This metric could be used to explain one of the reasons behind access failure.The blocking rate for PS streaming calls per UtranCell due to RN admissionblocking, TN congestion or TN failure is given by the equation in Section3.3.5.30 on page 40 and Section 3.3.5.31 on page 41.

3.3.2 Retainability

3.3.2.1 Circuit-Switched (CS) Speech Drop Rate

The drop rate per UtranCell for speech is given by

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)UtranCell(hleaseSpeecReRabpmNoSystem)UtranCell(hleaseSpeecReRabpmNoNormal)UtranCell(hleaseSpeecReRabpmNoSystem

%)UtranCell(D_R_Sp 100

Figure 18 Circuit-Switched (CS) Speech Drop Rate

The drop rate per IurLink for Drifting UEs in neighboring RNCs for speech isgiven by

)IurLink(hleaseSpeecReRabpmNoSystem)IurLink(hleaseSpeecReRabpmNoNormal)IurLink(hleaseSpeecReRabpmNoSystem

%)IurLink(Iur_D_R_Sp 100

Figure 19 Circuit-Switched (CS) Speech Drop Rate per IurLink for Drifting UEs

Note: If the feature “Drifting RNC Observability”, Reference [7], is not in usethe total drop rate per RNC including Drifting UEs for speech is givenby summarizing all cell level counters up to RNC level together with allIur level counters for that particular RNC from IurLinks in neighboringRNCs

3.3.2.2 Circuit-Switched (CS) Speech Minutes per Drop

The Speech Minutes per Drop per UtranCell is given by

l)h(UtranCelleaseSpeecReRabpmNoSystemUtranCell)Sp_U_User(PERLEN)UtranCell(MD_R_Sp

Figure 20 Circuit-Switched (CS) Speech Minutes per Drop

PERLEN is the measurement time in minutes, that is 15 for one ROP.

3.3.2.3 Circuit-Switched 64 Drop Rate

The drop rate per UtranCell for CS 64 is given by

646464

10064

) (UtranCellleaseCsRestemRab) + pmNoSy(UtranCellleaseCsReRabpmNoNormal)(UtranCellleaseCsReRabpmNoSystem

%Cell) = _R_D(UtranCS

Figure 21 Circuit-Switched 64 Drop Rate

The drop rate per IurLink for Drifting UEs in neighboring RNCs for CS 64 isgiven by

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646464

10064

(IurLink)leaseCsReemRab+ pmNoSyst(IurLink)leaseCsReRabpmNoNormal(IurLink)leaseCsReRabpmNoSystem

%urLink) = _R_D_Iur(ICS

Figure 22 Circuit-Switched (CS) 64 Drop Rate per IurLink for Drifting UEs

Note: If the feature “Drifting RNC Observability”, Reference [7], is not in usethe total drop rate per RNC including Drifting UEs for CS 64 is givenby summarizing all cell level counters up to RNC level together with allIur level counters for that particular RNC from IurLinks in neighboringRNCs

3.3.2.4 Circuit-Switched 64 Minutes per Drop

The Circuit-Switched 64 Minutes per Drop per UtranCell is given by

646464

)(UtranCellleaseCsReRabpmNoSystemranCell)_U_User(UtCSPERLENnCell)_R_MD(UtraCS

Figure 23 Circuit-Switched 64 Minutes per Drop


3.3.2.5 Circuit-Switched Streaming (CS 57) Drop Rate

The drop rate per UtranCell for CS Streaming is given by

10057

ell)eam(UtranCleaseCsStrReoSystemRabell) + pmNeam(UtranCleaseCsStrReRabpmNoNormalell)eam(UtranCleaseCsStrReRabpmNoSystem

%Cell) = _R_D(UtranCS

Figure 24 Circuit-Switched Streaming (CS 57) Drop Rate

The drop rate per IurLink for Drifting UEs in neighboring RNCs for CS Streaming(57) is given by

k)eam(IurLinleaseCsStrReystemRabk) + pmNoSeam(IurLinleaseCsStrReRabpmNoNormalk)eam(IurLinleaseCsStrReRabpmNoSystem

urLink)_R_D_Iur(ICS %100=57

Figure 25 Circuit-Switched (CS) Streaming (57) Drop Rate per IurLink for Drifting UEs

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Note: If the feature “Drifting RNC Observability”, Reference [7], is not in usethe total drop rate per RNC including Drifting UEs for CS Streaming(57) is given by summarizing all cell level counters up to RNC leveltogether with all Iur level counters for that particular RNC from IurLinksin neighboring RNCs

3.3.2.6 Circuit-Switched Streaming (CS 57) Minutes per Drop

The Circuit-Switched Streaming (CS 57) Minutes per Drop per UtranCell isgiven by

5757ell)eam(UtranCleaseCsStrReRabpmNoSystem

ranCell)_U_User(UtCSPERLENnCell)_R_MD(UtraCS

Figure 26 Circuit-Switched (CS) Streaming (57) Minutes per Drop.


3.3.2.7 Packet-Switched (PS) Streaming 64 Drop Rate

The drop rate per UtranCell for PS Streaming 64 is given by

)UtranCell(tStreamleasePackeReRabpmNoSystem)UtranCell(tStreamleasePackeReRabpmNoNormal)UtranCell(tStreamleasePackeReRabpmNoSystem

%)UtranCell(D_R_PStr 10064

Figure 27 Packet-Switched (PS) Streaming 64 Drop Rate

3.3.2.8 Packet-Switched (PS) Streaming 128 Drop Rate

The drop rate per UtranCell for PS Streaming 128 is given by

)UtranCell(tStreamleasePackeReRabpmNoSystem)UtranCell(tStreamleasePackeReRabpmNoNormal)UtranCell(tStreamleasePackeReRabpmNoSystem

%)UtranCell(D_R_PStr

128128128

100128

Figure 28 Packet-Switched (PS) Streaming 128 Drop Rate

3.3.2.9 Packet-Switched (PS) Streaming HS Drop Rate

The drop rate per UtranCell for PS Streaming HS is given by

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)UtranCell(eamHsleasePsStrReRabpmNoSystem)UtranCell(eamHsleasePsStrReRabpmNoNormal)UtranCell(eamHsleasePsStrReRabpmNoSystem

%)UtranCell(D_R_PStrHS 100

Figure 29 Packet-Switched (PS) Streaming HS Drop Rate

The drop rate per IurLink for Drifting UEs in neighboring RNCs for PS Streamingis given by

rLink)tStream(IuleasePackeRebNoSystemRarLink)+ pmtStream(IuleasePackeReRabpmNoNormalrLink)tStream(IuleasePackeReRabpmNoSystem

)ur(IurLinkPStr_R_D_I %100=

Figure 30 Packet-Switched (PS) Streaming Drop Rate per IurLink for Drifting UEs

Note: If the feature “Drifting RNC Observability”, Reference [7], is not in usethe total drop rate per RNC including Drifting UEs for PS Streaming isgiven by summarizing all cell level counters up to RNC level togetherwith all Iur level counters for that particular RNC from IurLinks inneighboring RNCs

3.3.2.10 Packet-Switched (PS) Streaming 64 Minutes per Drop

The Packet-Switched (PS) Streaming 64 Minutes per Drop per UtranCell isgiven by

)UtranCell(tStreamleasePackeReRabpmNoSystem)UtranCell(User_U_PStr

PERLEN)UtranCell(MD_R_PStr

64

64

Figure 31 Packet-Switched (PS) Streaming 64 Minutes per Drop


3.3.2.11 Packet-Switched (PS) Streaming 128 Minutes per Drop

The Packet-Switched (PS) Streaming 128 Minutes per Drop per UtranCell isgiven by

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)UtranCell(tStreamleasePackeReRabpmNoSystem)UtranCell(User_U_PStr

PERLEN)UtranCell(MD_R_PStr

128128

128

Figure 32 Packet-Switched (PS) Streaming 128 Minutes per Drop


3.3.2.12 Packet-Switched (PS) Streaming HS Minutes per Drop

The Packet-Switched (PS) Streaming Minutes per Drop per UtranCell is givenby

)UtranCell(eamHsleasePsStrReRabpmNoSystem)UtranCell(User_U_PStrHS

PERLEN)UtranCell(MD_R_PStrHS

Figure 33 Packet-Switched (PS) Streaming HS Minutes per Drop


3.3.2.13 Packet-Switched (PS) Interactive Drop Rate

The Packet-Switched drop rate per UtranCell for all PS interactive services isgiven by

l)a(UtranCelSuccFachUrpmChSwitch

Cell)+tUra(UtranleasePackeRebNoSystemRaCell) - pmtUra(UtranleasePackeReRabpmNoNormal

l)-t(UtranCelleasePackeReystemRabl) + pmNoSt(UtranCelleasePackeReRabpmNoNormal)UtranCell(tUraleasePackeReystemRabl) - pmNoSt(UtranCelleasePackeReRabpmNoSystem

%)UtranCell(D_Rint_P 100

Figure 34 Packet-Switched (PS) Interactive Drop Rate

The drop rate per IurLink for Drifting UEs in neighboring RNCs for PS Interactiveis given by

t(IurLink)leasePackeRetemRab + pmNoSyst(IurLink)leasePackeReRabpmNoNormalt(IurLink)leasePackeReRabpmNoSystem

urLink)_R_D_Iur(IintP 100[%]=

Figure 35 Packet-Switched (PS) Interactive Drop Rate per IurLink for Drifting UEs

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Radio Network KPI

Note: If the feature “Drifting RNC Observability” , Reference [7], is not in usethe total drop rate per RNC including Drifting UEs for PS Interactive isgiven by summarizing all cell level counters up to RNC level togetherwith all Iur level counters for that particular RNC from IurLinks inneighboring RNCs

3.3.2.14 Packet-Switched (PS) Interactive DCH/FACH Drop Rate

Packet-Switched (PS) Interactive DCH/FACH drop rate per UtranCell is given by

)()()()(

)()()()(

)()()(

%100__int

UtranCellaSuccFachUrpmChSwitchUtranCellsIntDcheconfOrigPRpmNoSuccRbUtranCelleleaseHsRbRpmNoSystemUtranCelleleaseHsRbRpmNoNormal

UtranCelletUraeleasePackRabRpmNoSystemUtranCelleteleasePackRabRpmNoSystemUtranCelletUraeleasePackRabRpmNoNormalUtranCelleteleasePackRabRpmNoNormal

UtranCelleleaseHsRbRpmNoSystemUtranCelleleaseUraRabRpmNoSystemUtranCelleteleasePackRabRpmNoSystem

DRDCHP

Figure 36 Packet-Switched (PS) Interactive DCH/FACH Drop Rate

Note: This formula is only applicable for P7.1

3.3.2.15 Packet-Switched (PS) Interactive HS Drop Rate

Packet-Switched (PS) Interactive HS drop rate per UtranCell is given by

)()()(

)()()(

%100__int

UtranCelloFachSuccpmPsIntHsTUtranCellsIntEuleconfOrigPRpmNoSuccRbUtranCellsIntHseconfOrigPRpmNoSuccRb

UtranCelleleaseHsRbRpmNoSystemUtranCelleleaseHsRbRpmNoNormalUtranCelleleaseHsRbRpmNoSystem

DRHSP

Figure 37 Packet-Switched (PS) Interactive HS Drop Rate

Note: This formula is only applicable for P7.1

3.3.2.16 Packet-Switched (PS) Interactive Minutes per Drop

The Packet-Switched (PS) Interactive Minutes per Drop per UtranCell is givenby

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Radio Network KPI

)(_int_

int

nCell))etUra(UtraeleasePackRabRpmNoSystemll)et(UtranCeeleasePackmRabR(pmNoSysteUtranCellUserUP

ERLENnCell) = P_R_MD(UtraP

Figure 38 Packet-Switched (PS) Interactive Minutes per Drop


3.3.2.17 Packet-Switched (PS) Interactive DCH/FACH Minutes per Drop

Packet-Switched (PS) Interactive DCH/FACH Minutes per Drop per UtranCell isgiven by

ranCell))leaseHs(UtReRbpmNoSystemCell)tUra(UtranleasePackeReRabpmNoSysteml)t(UtranCelleasePackeRemRab(pmNoSyste

l))r(UtranCelFach_U_Useint) + P(UtranCellDCH_U_Userint(P

= PERLENtranCell)DCH_R_MD(UintP

Figure 39 Packet-Switched (PS) Interactive DCH/FACH Minutes per Drop


3.3.2.18 Packet-Switched (PS) Interactive HS Minutes per Drop

Packet-Switched (PS) Interactive HS Minutes per Drop per UtranCell is given by

tranCell)eleaseHs(URbRpmNoSystemUtranCell)HS_U_User(P PERLENranCell) =HS_R_MD(UtP intint

Figure 40 Packet-Switched (PS) Interactive HS Minutes per Drop


3.3.2.19 Packet-Switched (PS) Interactive EUL Minutes per Drop

Packet-Switched (PS) Interactive EUL Minutes per Drop per UtranCell is givenby

tranCell)leaseEul(UReRbpmNoSystem)(UtranCellEUL_U_UserintP= PERLENtranCell)EUL_R_MD(UintP

Figure 41 Packet-Switched (PS) Interactive EUL Minutes per Drop


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Radio Network KPI

3.3.2.20 SRB only 3.4 Drop Rate

The drop rate per UtranCell for SRB only 3.4 is given by

)(34)(34)(34

%100)(__34

UtranCellnlyeleaseSrbORpmNoNormalUtranCellnlyeleaseSrbORpmNoSystemUtranCellnlyeleaseSrbORpmNoSystem

UtranCellDRSRBonly

Figure 42 SRB only 3.4Drop Rate

3.3.2.21 SRB only 13.6 Drop Rate

The drop rate per UtranCell for SRB only 13.6 is given by

)(136)(136)(136

%100)(__136

UtranCellnlyeleaseSrbORpmNoNormalUtranCellnlyeleaseSrbORpmNoSystemUtranCellnlyeleaseSrbORpmNoSystem

UtranCellDRSRBonly

Figure 43 SRB only 13.6 Drop Rate

3.3.2.22 SRB only 3.4 Minutes per Drop

SRB only 3.4 Minutes per Drop per UtranCell is given by

)UtranCell(lyleaseSrbOnRepmNoSystem)UtranCell(User_U_SRBonly

PERLEN)UtranCell(MD_R_SRBonly34

3434

Figure 44 SRB only 3.4 Minutes per Drop


3.3.2.23 SRB only 13.6 Minutes per Drop

SRB only 13.6 Minutes per Drop per UtranCell is given by

)UtranCell(lyleaseSrbOnRepmNoSystem)UtranCell(User_U_SRBonly

PERLEN)UtranCell(MD_R_SRBonly136

136136

Figure 45 SRB only 13.6 Minutes per Drop


3.3.2.24 MBMS PTM Session Drop Rate

The MBMS PTM drop rate per UtranCell is given by

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Radio Network KPI

)MbmsCch(onStartsMbmsSessipmNoSucces)MbmsCch(nStopMbmsSessiopmNoSystem

%)MbmsCch(R_PTM_MBMS 100

Figure 46 MBMS PTM session drop rate

3.3.3 Call Completion Success Rate (CCSR)

3.3.3.1 Circuit-Switched (CS) Speech CCSR

The call completion success rate per UtranCell for speech is given by

%anCell)Sp_R_D(Utr

Cell)Sp_A(UtranCell)Sp_C(Utran100

1

Figure 47 Circuit-Switched (CS) Speech CCSR

3.3.3.2 Circuit-Switched (CS) 64 CCSR

The call completion success rate per UtranCell for CS 64 is given by

%Cell)_R_D(UtranCS

ll)_A(UtranCeCSll)_C(UtranCeCS100

6416464

Figure 48 Circuit-Switched (CS) 64 CCSR

3.3.3.3 Circuit-Switched Streaming (CS 57) CCSR

The call completion success rate per UtranCell for CS streaming is given by

%Cell)_R_D(UtranCS

ll)_A(UtranCeCSll)_C(UtranCeCS100

5715757

Figure 49 Circuit-Switched Streaming (CS 57) CCSR

3.3.3.4 Packet-Switched (PS) Streaming 64 CCSR

The call completion success rate per UtranCell for PS Streaming 64 is given by

%Cell)_R_D(UtranPStr

ll)_A(UtranCePStrll)_C(UtranCePStr100

6416464

Figure 50 Packet-Switched (PS) Streaming 64 CCSR

3.3.3.5 Packet-Switched (PS) Streaming 128 CCSR

The call completion success rate per UtranCell for PS Streaming 128 is given by

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Radio Network KPI

%Cell)_R_D(UtranPStr

ll)_A(UtranCePStrll)_C(UtranCePStr100

1281128128

Figure 51 Packet-Switched (PS) Streaming 128 CCSR

3.3.3.6 Packet-Switched (PS) Streaming HS CCSR

The call completion success rate per UtranCell for PS Streaming HS is given by

%) (UtranCellPStrHS_R_D

tranCell)PStrHS_A(UtranCell)PStrHS_C(U100

1

Figure 52 Packet-Switched (PS) Streaming HS CCSR

3.3.3.7 Packet-Switched (PS) Interactive CCSR

Since call completion for packet data services from user perspective iscompleting its service and temporary interruption may be recovered by higherlayer due to retransmission, the packet call completion rate per UtranCell couldbe approximated from user perspective with the following equation:

%Cell)_R_D(UtranintP

ll)_A(UtranCeintPll)_C(UtranCeintP100

1

Figure 53 Packet-Switched (PS) Interactive CCSR

3.3.4 Integrity

3.3.4.1 BLER

BLER for both uplink and downlink for the different services can be measuredon cell level using RES. See Reference [6] for more information on RES andthe formulas to use.

It is possible to calculate uplink BLER on RNC level using certain TransportBlock counters. The formula below show the uplink BLER for speech, UeRcnumber equal to 2, and similar formulas can be used to calculate the uplinkBLER for other services as well, using different UeRc State numbers. UeRcState numbering is described in Reference [3]

221002

UeRcltBlocksAcUpmTransporUeRccksAcUlansportBlopmFaultyTr

%UeRcUL_I_Sp

Figure 54 BLER

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Radio Network KPI

3.3.4.2 Packet-Switched (PS) Interactive DCH/FACH Average Throughput (kbit/s)

The following equation measures the Average Throughput for PS interactiveDCH/FACH. Counters for small packets, pmSentPacketData1 andpmTotalPacketDurationHs are not included in the formula as there is a constantone-way delay for each packet affecting latency for the small packets, whichgives a worse measured performance than user perceived performance, ifthese counters are used.

on)(RncFunctiationlPacketDuron)+pmTota(RncFunctinketDuratiopmTotalPacon)(RncFunctinketDuratiopmTotalPac

on)(RncFunctietDatapmSentPackon)(RncFunctietDatapmSentPackon)(RncFunctietDatapmSentPack

)ncFunctionDCH_I_TP(RintP

432

432

10008

Figure 55 Packet-Switched (PS) DCH/FACH Interactive Average Throughput

3.3.4.3 Packet-Switched (PS) Interactive HS Average Throughput (kbit/s)

The following equation measures the Average Throughput for PS interactive HS.Counters for small packets, pmSentPacketDataHs1, pmSentPacketDataHs2,pmTotalPacketDurationHs1 and pmTotalPacketDurationHs2 are not includedin the formula as there is a constant one-way delay for each packet affectinglatency for the small packets, which gives a worse measured performance thanuser perceived performance, if these counters are used.

on))(RncFunctiationHslPacketDuron)+pmTota(RncFunctionHscketDurati(pmTotalPaon))(RncFunctiHsPacketDataon)+pmSent(RncFuncticketDataHs( pmSentPa

cFunction)HS_I_TP(RnintP

434310008

Figure 56 Packet-Switched (PS) Interactive HS Average Throughput (kbit/s)

3.3.4.4 Packet-Switched (PS) Interactive DCH/FACH User Throughput, Downlink(kbit/s)

The PS Interactive DCH/FACH user downlink throughput per UtranCell in ameasurement period of 15 minutes is given by

)(UtranCellrPacketThpchDlRlcUsepmSamplesDanCell)ketThp(UtrRlcUserPacpmSumDchDl

nCell)_User(UtraDCH_I_DlTpintP

Figure 57 Packet-Switched (PS) Interactive DCH/FACH User Throughput, Downlink

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Radio Network KPI

The PS Interactive DCH/FACH user downlink throughput per RNC in ameasurement period of 15 minutes is given by

RNCUtranCell )(UtranCellrPacketThpchDlRlcUsepmSamplesDanCell)ketThp(UtrRlcUserPacpmSumDchDl

= _User(RNC)DCH_I_DlTpintP

Figure 58 The PS Interactive DCH/FACH user downlink throughput per RNC in a measurementperiod of 15 minutes

3.3.4.5 Packet-Switched (PS) Interactive DCH/FACH User Throughput, Uplink(kbit/s)

The PS Interactive DCH/FACH user uplink throughput per UtranCell in ameasurement period of 15 minutes is given by

)(UtranCellrPacketThpchUlRlcUsepmSamplesDanCell)ketThp(UtrRlcUserPacpmSumDchUl

nCell)_User(UtraDCH_I_UlTpintP

Figure 59 Packet-Switched (PS) Interactive DCH/FACH User Throughput, Uplink

The PS Interactive DCH/FACH user uplink throughput per RNC in ameasurement period of 15 minutes is given by

RNCUtranCell )(UtranCellrPacketThpchUlRlcUsepmSamplesDanCell)ketThp(UtrRlcUserPacpmSumDchUl

_User(RNC)DCH_I_UlTpintP

Figure 60 The PS Interactive DCH/FACH user uplink throughput per RNC in a measurementperiod of 15 minutes

3.3.4.6 Packet-Switched (PS) Interactive HS User Throughput, Downlink (kbit/s)

The PS Interactive HS user downlink throughput per UtranCell in ameasurement period of 15 minutes is given by

)UtranCell(PacketThpsDlRlcUserpmSamplesH)UtranCell(etThplcUserPackpmSumHsDlR

)UtranCell(User_DlTp_I_HSintP

Figure 61 Packet-Switched (PS) Interactive HS User Throughput, Downlink

3.3.4.7 Packet-Switched (PS) Interactive EUL User Throughput, Uplink (kbit/s)

The PS Interactive EUL user uplink throughput per UtranCell in a measurementperiod of 15 minutes is given by

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Radio Network KPI

)UtranCell(acketThpulRlcUserPpmSamplesE)UtranCell(tThpcUserPackepmSumEulRl

)UtranCell(User_UlTp_I_EULintP

Figure 62 Packet-Switched (PS) Interactive EUL User Throughput, Uplink

3.3.4.8 Packet-Switched (PS) Streaming DCH 64 User Throughput, Downlink(kbit/s)

The PS Streaming DCH 64 user downlink throughput per UtranCell in ameasurement period of 15 minutes is given by

)UtranCell(pPsStreamlRlcUserThpmSamplesD)UtranCell(treamUserThpPsSpmSumDlRlc

)UtranCell(User_DlTp_I_Pstr64

6464

Figure 63 Packet-Switched (PS) Streaming DCH 64 User Throughput, Downlink

3.3.4.9 Packet-Switched (PS) Streaming DCH 128 User Throughput, Downlink(kbit/s)

The PS Streaming DCH 128 user downlink throughput per UtranCell in ameasurement period of 15 minutes is given by

)(128)(128)(___128

UtranCellpPsStreamlRlcUserThpmSamplesDUtranCelltreamUserThpPsSpmSumDlRlc

UtranCellUserDlTpIPstr

Figure 64 Packet-Switched (PS) Streaming DCH 128 User Throughput, Downlink

3.3.4.10 Packet-Switched (PS) Streaming HS User Throughput, Downlink (kbit/s)

The PS Streaming HS user downlink throughput per UtranCell in ameasurement period of 15 minutes is given by

)UtranCell(spPsStreamHlRlcUserThpmSamplesU)UtranCell(treamHsUserThpPsSpmSumUlRlc

)UtranCell(User_DlTp_I_PstrHS

Figure 65 Packet-Switched (PS) Streaming HS User Throughput, Downlink

3.3.4.11 Packet-Switched (PS) Streaming DCH 16 User Throughput, Uplink (kbit/s)

The PS Streaming DCH 16 user uplink throughput per UtranCell in ameasurement period of 15 minutes is given by

)UtranCell(pPsStreamlRlcUserThpmSamplesU)UtranCell(treamUserThpPsSpmSumUlRlc

)UtranCell(User_UlTp_I_Pstr16

1616

Figure 66 Packet-Switched (PS) Streaming DCH 16 User Throughput, uplink

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Radio Network KPI





3232






128128


3.3.4.14 Packet-Switched (PS) Interactive DCH/DCH Downlink Latency (ms)

The PS Interactive DCH/DCH DL Latency per RncFunction in a measurementperiod of 15 minutes is given by

)nRncFunctio(cychDchLatenpmSamplesD)nRncFunctio(hLatencypmSumDchDc

)nRncFunctio(DlLat_I_DCHDCHintP 1000

Figure 69 Packet-Switched (PS) Interactive DCH/DCH downlink latency

3.3.4.15 Packet-Switched (PS) Interactive DCH/HS Downlink Latency (ms)

The PS Interactive DCH/HS DL Latency per RncFunction in a measurementperiod of 15 minutes is given by

)nRncFunctio(ysDchLatencpmSamplesH)nRncFunctio(LatencypmSumHsDch

)nRncFunctio(DlLat_I_DCHHSintP 1000

Figure 70 Packet-Switched (PS) Interactive DCH/HS downlink latency

3.3.4.16 Packet-Switched (PS) Interactive EUL/HS Downlink Latency (ms)

The PS Interactive EUL/HS DL Latency per RncFunction in a measurementperiod of 15 minutes is given by

28 120/1553-HSD 101 02/7 Uen E 2009-02-16

Radio Network KPI

)nRncFunctio(ysEulLatencpmSamplesH)nRncFunctio(LatencypmSumHsEul

)nRncFunctio(DlLat_I_EULHSintP 1000

Figure 71 Packet-Switched (PS) Interactive EUL/HS downlink latency

3.3.4.17 Channel Downswitch Success rate

The channel downswitch success rate per UtranCell in a measurement periodof 15 minutes is given by

UtranCell)chAttempt(pmDownSwitUtranCell)chSuccess(pmDownSwit

ll)_S(UtranCeP_I_ ChDSw

Figure 72 Channel Downswitch Success rate

3.3.4.18 Channel Upswitch Success rate

The channel upswitch success rate per UtranCell in a measurement period of15 minutes is given by

ll)ul(UtranCechAttemptEpmUlUpswitl)s(UtranCelchAttemptHpmDlUpswit + UtranCell)temptHigh(UpswitchAtell)+ pmUligh(UtranCchAttemptHpmDlUpswit

ell) + ium(UtranCAttemptMedUlUpswitchnCell)+ pmedium(UtrachAttemptMpmDlUpswit+ tranCell) temptLow(UUpswitchAtll) + pmUlow(UtranCechAttemptLpmDlUpswit

ll)ul(UtranCechSuccessEpmUlUpswitl)s(UtranCelchSuccessHpmDlUpswitell) + igh(UtranCchSuccessHpmUlUpswitCell)High(UtrantchSuccess pmDlUpswi

nCell)edium(UtrachSuccessMpmUlUpswitnCell)edium(UtrachSuccessMpmDlUpswittranCell)ccessLow(UUpswitchSull) + pmUlow(UtranCechSuccessLpmDlUpswit

ll)_S(UtranCeP_I_ ChUSw

Figure 73 Channel Upswitch Success rate

3.3.4.19 MBMS PTM Session Restart Ratio

The MBMS PTM session restart ratio is given by

)MbmsCch(onsMbmsSessipmNoSucces)MbmsCch(nStartsMbmsSesiopmNoSucces

%)MbmsCch(I_PTM_MBMS 100

Figure 74 MBMS PTM Session Restart Ratio

3.3.5 System Utilization

3.3.5.1 Soft/Softer Handover Overhead

The Handover Reduction Factor (HRF) is defined as the ratio of downlink codechannel utilization for speech and the average number of users served. This

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Radio Network KPI

metric shows how much of the radio resources (code and power) are used tosupport soft/softer handover in a given cell.

UtranCell)Xy_U_User(tranCell)Xy_U_Tot(U

anCell)Xy_HRF(Utr

Figure 75 Soft/Softer Handover Overhead

Where “Xy” can be any type of service, for example Speech (Sp) orCircuit-Switched 57 (CS57).

The handover Reduction Factor (HRF) can be calculated per RNC as follows:

s(RNC) Xy_U_UserNC)Xy_U_Tot(R

)Xy_HRF(RNC

Figure 76 The handover Reduction Factor (HRF) per RNC

3.3.5.2 Average Number of Circuit-Switched (CS) Speech Users

The average number of speech users per UtranCell in a measurement period of15 minutes is given by

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Radio Network KPI

)UtranCell(shRabEstabliestAmrNbMmpmSamplesB)UtranCell(stablishmrNbMmRabEpmSumBestA

)UtranCell(bEstablishestAmrWbRapmSamplesB)UtranCell(ablishmrWbRabEstpmSumBestA

)UtranCell(shRabEstabliestAmrpmSamplesB)UtranCell(shRabEstablimrpmSumBestA




)UtranCell(EstablishestCspmSamplesB)UtranCell(EstablishspmSumBestC

)UtranCell(User_U_Sp

47504750

59005900

79507950

1220012200

1212

Figure 77 Average Number of Circuit-Switched (CS) Speech Users

3.3.5.3 Circuit-Switched (CS) Speech Downlink Code Utilization

The average number of downlink code is occupied for speech traffic perUtranCell in a measurement period of 15 minutes is given by

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Radio Network KPI

)()(

)()(

2)(4750)(4750

2)(5900)(5900

)(7950)(7950

)(12200)(12200

)(12)(12

)(__

UtranCellstablishmrNbMmRabEpmSamplesAUtranCelllishMmRabEstabpmSumAmrNb

UtranCellablishmrWbRabEstpmSamplesAUtranCellshRabEstablipmSumAmrWb

UtranCellshRabEstablimrpmSamplesAUtranCellshRabEstablipmSumAmr




UtranCellEstablishspmSamplesCUtranCellEstablishpmSumCs

UtranCellTotUSp

Figure 78 Circuit-Switched (CS) Speech Downlink Code Utilization

3.3.5.4 Circuit-Switched (CS) Speech Erlang

The average speech traffic Erlang carried per UtranCell in one hour is given by

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Radio Network KPI

periodsmin utive sec con over fourUtranCell)Establish(AmrNbMmRabamplesBestSum of pmS periodsmin utive secr four connCell) oveblish(UtrabMmRabEstaumBestAmrNSum of pmS

periodsmin utive seconver four cranCell) otablish(UtAmrWbRabEsamplesBestSum of pmS periodsmin utive secfour conell) over ish(UtranCbRabEstablumBestAmrWSum of pmS

periodsmin utive secour conll) over fsh(UtranCeRabEstabliAmramplesBestSum of pmS periodsmin utive secour conll) over fsh(UtranCeRabEstabliumBestAmrSum of pmS



periodsmin utivesecour conll) over fsh(UtranCeRabEstabliAmramplesBestSum of pmS periodsmin utive secour conll) over fsh(UtranCeRabEstabliumBestAmrSum of pmS

periodsmin utive sec con over fourUtranCell)Establish(CsamplesBestSum of pmS periodsmin utive sec con over fourUtranCell)Establish(umBestCsSum of pmS

ll)im(UtranCePrSp_U_

1515

1515

154750154750

155900155900

157950157950

15122001512200

15121512

Figure 79 Circuit-Switched (CS) Speech Erlang

3.3.5.5 Circuit-Switched (CS) 57 Users

The average number of CS 57 users per UtranCell is given by

ll)sh(UtranCeRabEstabliBestCs pmSamplesll)sh(UtranCeRabEstablispmSumBestC

ranCell)_U_User(UtCS57

5757

Figure 80 Circuit-Switched (CS) 57 Users

3.3.5.6 Circuit-Switched (CS) 57 Downlink Code Utilization

The average number of downlink code is occupied for CS 57 traffic perUtranCell in a measurement period of 15 minutes is given by

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Radio Network KPI

ll)sh(UtranCeRabEstablispmSamplesCll)sh(UtranCeRabEstablipmSumCs

anCell)_U_Tot(UtrCS57

5757

Figure 81 Circuit-Switched (CS) 57 Downlink Code Utilization

3.3.5.7 Circuit-Switched (CS) 57 Erlang

The average Circuit-Switched 57 traffic Erlang carried per UtranCell in onehour is given by

periodsminutivesec con over fourUtranCell)Establish(CsamplesBestSum of pmS periodsminutivesec con over fourUtranCell)Establish(umBestCsSum of pmS

ll)im(UtranCePr_U_CS

15571557

57

Figure 82 Circuit-Switched (CS) 57 Erlang

3.3.5.8 Circuit-Switched (CS) 64 Users

The average number of CS 64 users per UtranCell is given by

ll)sh(UtranCeRabEstabliestCspmSamplesBll)sh(UtranCeRabEstablispmSumBestC

ranCell)_U_User(UtCS64

6464

Figure 83 Circuit-Switched (CS) 64 Users

3.3.5.9 Circuit-Switched (CS) 64 Downlink Code Utilization

The average number of downlink code is occupied for CS 64 traffic perUtranCell in a measurement period of 15 minutes is given by

ll)sh(UtranCeRabEstablispmSamplesCll)sh(UtranCeRabEstablipmSumCs

anCell)_U_Tot(UtrCS64

6464

Figure 84 Circuit-Switched (CS) 64 Downlink Code Utilization

3.3.5.10 Circuit-Switched (CS) 64 Erlang

The average Circuit-Switched 64 traffic Erlang carried per UtranCell in onehour is given by

periodsminutivesec con over fourUtranCell)Establish(CsamplesBestSum of pmS periodsminutivesec con over fourUtranCell)Establish(umBestCsSum of pmS

ll)im(UtranCePr_U_CS

15641564

64

Figure 85 Circuit-Switched (CS) 64 Erlang

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Radio Network KPI

3.3.5.11 PS Interactive Users

The average number of PS Interactive users, excluding URA_PCH, perUtranCell is given by

)(UtranCellbEstablishachPsIntRapmSamplesFanCell)ablish(UtrsIntRabEstpmSumFachP

)(UtranCellbEstablishestPsEulRapmSamplesBUtranCellablishsEulRabEstpmSumBestP

ell)ish(UtranChRabEstablestPsHsAdcpmSamplesBUtranCell)Establish(sHsAdchRabpmSumBestP

ell)ish(UtranCtRabEstablestDchPsInpmSamplesBUtranCell)Establish(chPsIntRabpmSumBestDranCell)_U_User(UtP

)(

int

Figure 86 PS Interactive Users

3.3.5.12 URA_PCH Users

The average number of URA_PCH Users per URA is given by

abUra(Ura)pmSamplesRa(Ura)pmSumRabUr

(Ura)Ura_U_User

Figure 87 URA_PCH Users

3.3.5.13 PS Interactive FACH Users

The average number of PS Interactive FACH users per UtranCell is given by

)(UtranCellbEstablishachPsIntRapmSamplesFanCell)ablish(UtrsIntRabEstpmSumFachP

l)r(UtranCelFach_U_UseintP

Figure 88 PS Interactive FACH Users

3.3.5.14 PS Interactive DCH Users

The average number of PS Data Interactive DCH users per UtranCell is given by

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Radio Network KPI

ell)ish(UtranCtRabEstablestDchPsInpmSamplesBUtranCell)Establish(chPsIntRabpmSumBestD

)(UtranCellDCH_U_UserintP

Figure 89 PS Interactive DCH Users

3.3.5.15 PS Interactive HS Users

The average number of PS Interactive HS users per UtranCell is given by

)(UtranCellbEstablishestPsEulRapmSamplesBUtranCellablishsEulRabEstpmSumBestP

ell)ish(UtranChRabEstablestPsHsAdcpmSamplesBUtranCell)Establish(sHsAdchRabpmSumBestPUtranCell)Hs_U_User(P

)(

int

Figure 90 PS Interactive HS Users

3.3.5.16 PS Interactive EUL Users

The average number of PS Interactive EUL users per UtranCell is given by

)(UtranCellbEstablishestPsEulRapmSamplesBanCell)ablish(UtrsEulRabEstpmSumBestP

)(UtranCellEul_U_UserintP

Figure 91 PS Interactive EUL Users

3.3.5.17 PS Streaming 64 Users

The average number of PS Streaming 64 users per UtranCell is given by

ll)sh(UtranCeRabEstabliPsestPsStrpmSamplesBll)sh(UtranCeRabEstabliPssStrpmSumBestP

ranCell)_U_User(UtPstr864

86464

Figure 92 PS Streaming 64 Users

3.3.5.18 PS Streaming 128 Users

The average number of PS Streaming 128 users per UtranCell is given by

ll)sh(UtranCeRabEstabliPsestPsStrpmSamplesBll)sh(UtranCeRabEstabliPssStrpmSumBestP

ranCell)_U_User(UtPstr8128

8128128

Figure 93 PS Streaming 128 Users

3.3.5.19 PS Streaming HS Users

The average number of PS Streaming HS users per UtranCell is given by

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Radio Network KPI

)UtranCell(HsRabEststPsStreampmSampleBe)UtranCell(abEstsStreamHsRpmSumBestP

ell)ser(UtranCPstrHS_U_U

Figure 94 PS Streaming HS Users

3.3.5.20 SRB only 3.4 Users

The average number of SRB only 3.4 users per UtranCell is given by

)UtranCell(shRabEstabliestSrbOnlypmSamplesB)UtranCell(shRabEstablirbOnlypmSumBestS

)UtranCell(User_U_SRBonly34

3434

Figure 95 SRB only 3.4 Users

3.3.5.21 SRB only 3.4 Downlink Code Utilization

The average number of downlink code is occupied for SRB only 3.4 perUtranCell in a measurement period of 15 minutes is given by

)UtranCell(shRabEstablirbOnlypmSamplesS)UtranCell(shRabEstablilypmSumSrbOn

)UtranCell(Tot_U_SRBonly34

3434

Figure 96 SRB only 3.4 Downlink Code Utilization

3.3.5.22 SRB only 3.4 Erlang

The average SRB only 3.4 Erlang carried per UtranCell in one hour is given by

periodsmin utive secconover four )UtranCell(shRabEstabliSrbOnlyamplesBestSum of pmS periodsmin utive secconover four )UtranCell(shRabEstablinlyumBestSrbOSum of pmS

)UtranCell(imPr_U_SRBonly

15341534

34

Figure 97 SRB only 3.4 Erlang

3.3.5.23 SRB only 13.6 Users

The average number of SRB only 13.6 users per UtranCell is given by

)UtranCell(shRabEstabliestSrbOnlypmSamplesB)UtranCell(shRabEstablirbOnlypmSumBestS

)UtranCell(User_U_SRBonly136

136136

Figure 98 SRB only 13.6 Users

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3.3.5.24 SRB only 13.6 Downlink Code Utilization

The average number of downlink code is occupied for SRB only 13.6 perUtranCell in a measurement period of 15 minutes is given by

)UtranCell(shRabEstablirbOnlypmSamplesS)UtranCell(shRabEstablilypmSumSrbOn

)UtranCell(Tot_U_SRBonly136

136136

Figure 99 SRB only 13.6 Downlink Code Utilization

3.3.5.25 SRB only 13.6 Erlang

The average SRB only 13.6 Erlang carried per UtranCell in one hour is given by

periodsmin utive secconover four )UtranCell(shRabEstabliSrbOnlyamplesBestSum of pmS periodsmin utive secconover four )UtranCell(shRabEstablinlyumBestSrbOSum of pmS

)UtranCell(imPr_U_SRBonly

1513615136

136

Figure 100 SRB only 13.6 Erlang

3.3.5.26 MBMS PTM Session (normalized)

The average number of MBMS PTM sessions (normalized)

)MbmsCch(bmsTrafficpmSamplesM)MbmsCch(rafficpmSumMbmsT

)MbmsCch(Session_U_PTM_MBMS

Figure 101 MBMS PTM Session (normalized)

3.3.5.27 Grade of Service for Circuit-Switched (CS) Speech

The GoS rate for Speech per UtranCell due to RN admission blocking, TNcongestion or TN failure is given by

))UtranCell)ng_Speech(Rab_Blocki(nCell))ng_CS(UtraRrc_Blocki((

%tranCell)Sp_A_GoS(U

111

100

Figure 102 Grade of Service for Circuit-Switched (CS) Speech

where

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Radio Network KPI

)UtranCell(qCsReConnectpmTotNoRrc)UtranCell(qBlockTnCsRenpmNoRrcCon)UtranCell(qDeniedAdmRepmNoRrcCs

)UtranCell(CS_Blocking_Rrc

Figure 103 Rrc Blocking CS

and

)UtranCell(mptSpeechablishAttepmNoRabEst)UtranCell(echBestBlockTnSpepmNoRabEst)UtranCell(echqDeniedSpeReopmNoOfNonH

)UtranCell(Speech_Blocking_Rab

Figure 104 RAB Blocking Speech

The GoS or blocking probability can be used together with Erlang metric tomeasure the cell capacity for a given service. Since a cell serves a mixed traffic,this measure must be used with respect to the amount of traffic measuredfor other services.

3.3.5.28 Grade of Service for Circuit-Switched (CS) 64 and 57

The GoS rate for both CS 64 and 57 calls per UtranCell due to RN admissionblocking, TN congestion or TN failure is given by

nCell)))ng_CS(UtraRab_Blocki(nCell))ng_CS(UtraRrc_Blocki((

%tranCell)CS_A_GoS(U

111

100

Figure 105 Grade of Service for Circuit-Switched (CS) 64 and 57

where Rrc_Blocking_CS is Figure 103 on page 39 and

)(UtranCellAttemptCsbEstablish) + pmNoRa(UtranCellmptCsablishAttepmNoRabEst)UtranCell(BestBlockTnCspmNoRabEst)UtranCell(BestBlockTnCspmNoRabEst

UtranCell)qDeniedCs(ReopmNoOfNonH

nCell)ng_CS(UtraRab_Blocki

57646457

Figure 106 RAB Blocking CS


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3.3.5.29 Grade of Service for Packet-Switched Interactive

The blocking rate for PS interactive calls per UtranCell due to RN admissionblocking, TN congestion or TN failure is given by

))UtranCell)ng_PsInt((Rab_Blocki(tranCell))ng_PsInt(URrc_Blocki((

%anCell)_A_GoS(UtrintP

111

100

Figure 107 Grade of Service for Packet-Switched Interactive

where

)UtranCell(qPsReConnectpmTotNoRrc)UtranCell(qBlockTnPsRenpmNoRrcCon)UtranCell(qDeniedAdmRepmNoRrcPs

)UtranCell(PsInt_Blocking_Rrc

Figure 108 Rrc Blocking PsInt

and

)UtranCell(nteractivemptPacketIablishAttepmNoRabEst)UtranCell(ntHsBestBlockTnPsIpmNoRabEst

)UtranCell(tntNonHsBesBlockTnPsIpmNoRabEst)UtranCell(eractiveqDeniedIntReopmNoOfNonH

)UtranCell(PsInt_Blocking_Rab

Figure 109 RAB Blocking PsInt


3.3.5.30 Grade of Service for Packet-Switched Streaming DCH

The blocking rate for PS streaming DCH calls per UtranCell due to RNadmission blocking, TN congestion or TN failure is given by

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Radio Network KPI

)UtranCell(treammptPacketSablishAttepmNoRabEst)UtranCell(treammptPacketSablishAttepmNoRabEst)UtranCell(ttrNonHsBesBlockTnPsSpmNoRabEst

)UtranCell(trqDeniedPsSReopmNoOfNonH)UtranCell(gmintreaqDeniedPsSReopmNoOfNonH

%)UtranCell(GoS_A_PStrDCH

128

128

100

Figure 110 Grade of Service for Packet-Switched Streaming DCH


3.3.5.31 Grade of Service for Packet-Switched Streaming HS

The blocking rate for PS streaming HS calls per UtranCell due to RN admissionblocking, TN congestion or TN failure is given by

)()()(

%100)(__

UtranCelltreamHsAttemptPsSpmNoRabEstUtranCellttreamHsBesBlockTnPsSpmNoRabEstUtranCellstPsStreamHBlockRnBespmNoRabEst

UtranCellGoSAPStrHS

Figure 111 Grade of Service for Packet-Switched Streaming HS


3.3.6 Mobility

3.3.6.1 Soft/Softer Handover Overhead Calculation

In this section, various statistics for different soft/softer handover state iscalculated. These statistics could be used to measure the overhead due tosoft/softer handover that have impact on cell dimensioning. The formulas doesnot give the amount of Ues in Soft/Softer HO in relation to total amount of Ueconnections. The following table shows the radio link counters per soft/softerstatus of a given UtranCell. It should be noted that these counters have alow sampling rate of 1 minute and the counters should be aggregated over asufficiently long period for statistical validity.

The columns of Table 2 on page 42 and Table 3 on page 42 show the countersthat step when the number of radio link sets is equal to the heading number.The rows of Table 2 on page 42 and Table 3 on page 42 show the countersthat step when the number of radio links is equal to the row heading. Basically,the gauge counter corresponding to these sum and sample counters increment

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Radio Network KPI

when the active set size is equal to the number of radio links in the countername and the number of radio link sets in the active set is equal to the numberof radio link sets in the counter name.

Remark: The term radio link is equivalent to a cell. The term radio link set isequivalent to the number of Iub connections or the number of node B's involvedin call processing.

Table 2 Soft/Softer radio link count per UtranCell

Ri,j 1 RlSet 2 RlSet 3 RlSet 4 RlSet

1 Rl pmSumUesWith1Rls 1RlInActSet N/A N/A N/A

2 Rl pmSumUesWith1Rls 2RlInActSet

pmSumUesWith2Rls 2RlInActSet N/A N/A

3 Rl pmSumUesWith1Rls 3RlInActSet

pmSumUesWith2Rls 3RlInActSet

pmSumUesWith3Rls 3RlInActSet N/A

4 Rl N/A pmSumUesWith2Rls 4RlInActSet



The following table shows the number of samples per radio link sum counter.

Table 3 Sample count for radio link sum counters

Si,j 1 RlSet 2 RlSet 3 RlSet 4 RlSet

1 Rl pmSamplesUesWith1Rls 1RlInActSet N/A N/A N/A

2 Rl pmSamplesUesWith1Rls 2RlInActSet

pmSamplesUesWith2Rls 2RlInActSet N/A N/A

3 Rl pmSamplesUesWith1Rls 3RlInActSet

pmSamplesUesWith2Rls 3RlInActSet

pmSamplesUesWith3Rls 3RlInActSet N/A

4 Rl N/A pmSamplesUesWith2Rls 4RlInActSet



3.3.6.1.1 Average Number of Radio Link Sets per User per UtranCell

This metric measures the soft handover overhead that results in multiple Iuband channel element usage to supports calls within the reference UtranCell.

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Radio Network KPI

4

2

4

1

3

111

4

2

4

1

3

111

j jij,ij,

i,i,i

j jij,ij,

i,i,i

SRSR

SRjSR

UtranCelltain this s that conActive SetNumber of ve setis in ActiUtranCellwhen this ctive Set Sets in ARadio LinkNumber of

)nCellrUser(UtraAvgNoRlsPe

Figure 112 Average Number of Radio Link Sets per User per UtranCell

Since most of the time Si,j has the same value for all “i” and “j”, the aboveequation can be simplified to

4

2

4

1

3

11

4

2

4

1

3

11

j jij,

i,i

j jij,

i,i

RR

RR j

UtranCelltain this s that conActive SetNumber of ve setis in ActiUtranCellwhen this ctive Set Sets in ARadio LinkNumber of

)nCellrUser(UtraAvgNoRlsPe

Figure 113 Average Number of Radio Link Sets per User per UtranCell, Simplified

3.3.6.1.2 Average Number of Radio Links per User per UtranCell

This metric measures the soft/softer handover overhead that results in multipleradio link usage to supports calls within the reference UtranCell. It measuresthe downlink power and channelization code overhead per user per UtranCell.

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Radio Network KPI

4

2

4

1

3

111

3

1 1

4

2144

j jij,ij,

i,i,i

i

i

jj,ij,i

j,ij,

SRSR

SRiSR

UtranCelltain this s that conActive SetNumber of ettn Active snCell is i this Utrae Set whens in ActivRadio LinkNumber of

Cell)User(UtranAvgNoRlPer

Figure 114 Average Number of Radio Links per User per UtranCell

Since most of the time Si,j has the same value for all “i” and “j”, the aboveequation can be simplified to

4

2

4

1

3

11

3

1 11

4

244

j ji,j

ii,

i

i

j,j

j,j

RR

RR i

UtranCelltain this s that conActive SetNumber of etn Active snCell is i this Utrae Set whens in ActivRadio LinkNumber of

Cell)User(UtranAvgNoRlPer

Figure 115 Average Number of Radio Links per User per UtranCell, simplified

3.3.6.2 Inter Frequency Handover Statistics

In this section, the equations for Inter Frequency Handover success rate perservice are covered.

3.3.6.2.1 Inter Frequency Handover Success Rate for Speech

The following metric measures hard handover success rate betweenfrequencies in UtranRelation for speech calls.

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Radio Network KPI

lation)Re(UtrancheqHoCsSpeeindInterFrpmAttNonBllation)Re(UtranechreqHoCsSpelindInterFpmSuccNonB

%lation)ReS(UtranSp_M_IFHO_

1212

100

Figure 116 Inter Frequency Handover Success Rate for Speech

3.3.6.2.2 Inter Frequency Handover Success Rate for CS non-speech

The following metric measures hard handover success rate betweenfrequencies in UtranRelation for CS non-speech calls.

lation)Re(UtranersationaleqHoCsConvindInterFrpmAttNonBllation)Rel(UtranversationareqHoCsConlindInterFpmSuccNonB

%lation)ReS(UtranCS_M_IFHO_ 100

Figure 117 Inter Frequency Handover Success Rate for CS non-speech

3.3.6.2.3 Inter Frequency Handover Success Rate for PS Interactive Less than or Equal64

The following metric measures hard handover success rate betweenfrequencies in UtranRelation for PS interactive calls with data rate less thanor equal 64kbps.

lation)Re(UtransractiveLeseqHoPsInteindInterFrpmAttNonBllation)Re(UtransseractiveLereqHoPsIntlindInterFpmSuccNonB

%lation)RetranFHO_S_CR(UOrLess_M_IintP

6464

10064

Figure 118 Inter Frequency Handover Success Rate for PS Interactive Less than or Equal 64

3.3.6.2.4 Inter Frequency Handover Success Rate for PS Interactive Greater than 64on DCH

The following metric measures hard handover success rate betweenfrequencies in UtranRelation for PS interactive calls with data rate on DCHlarger than 64kbps.

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Radio Network KPI

)lationReUtran(IntHslindIfhoPspmSuccNonB

)lationReUtran(erctiveGreateqPsInteraindInterFrpmAttNonBl)lationReUtran(IntHslindIfhoPspmSuccNonB

)lationReUtran(teractiveGreareqPsInterlindInterFpmSuccNonB

%)lationReUtran(CR_S_IFHO_M_DCHPlusintP

64

6410064

Figure 119 Inter Frequency Handover Success Rate for PS Interactive Greater than 64 on DCH

3.3.6.2.5 Inter Frequency Handover Success Rate for PS Interactive Greater than 64

The following metric measures hard handover success rate betweenfrequencies in UtranRelation for PS interactive calls with data rate larger than64kbps.

lation)Re(UtranaterractiveGreeqHoPsInteindInterFrpmAttNonBllation)Re(UtraneatereractiveGrreqHoPsIntlindInterFpmSuccNonB

%lation)ReanO_S_CR(UtrPlus_M_IFHintP

6464

10064

Figure 120 Inter Frequency Handover Success Rate for PS Interactive Greater than 64

3.3.6.2.6 Inter Frequency Handover Success Rate for PS Interactive HS

The following metric measures hard handover success rate betweenfrequencies in UtranRelation for PS interactive HS calls.

)lationReUtran(ntHsindIfhoPsIpmAttNonBl)lationReUtran(IntHslindIfhoPspmSuccNonB

%)lationReUtran(CR_S_IFHO_M_HSintP 100

Figure 121 Inter Frequency Handover Success Rate for PS Interactive HS

3.3.6.2.7 Inter Frequency Handover Success Rate for PS Interactive EUL

The following metric measures hard handover success rate betweenfrequencies in UtranRelation for PS interactive EUL calls.

)lationReUtran(ntEulindIfhoPsIpmAttNonBl)lationReUtran(IntEullindIfhoPspmSuccNonB

%)lationReUtran(CR_S_IFHO_M_EULintP 100

Figure 122 Inter Frequency Handover Success Rate for PS Interactive EUL

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Radio Network KPI

3.3.6.2.8 Inter Frequency Handover Success Rate for PS Streaming HS

The following metric measures hard handover success rate betweenfrequencies in UtranRelation for PS Streaming HS.

)lationReUtran(trHsindIfhoPsSpmAttNonBl)lationReUtran(StrHslindIfhoPspmSuccNonB

%)lationReUtran(CR_S_IFHO_M_PStrHS 100

Figure 123 Inter Frequency Handover Success Rate for PS Streaming HS

3.3.6.2.9 Inter Frequency Handover Success Rate for Streaming

The following metric measures hard handover success rate betweenfrequencies in UtranRelation for Streaming.

lation)ReangOther(UtrmineqHoStreaindInterFrpmAttNonBllation)ReangOther(UtrminreqHoStrealindInterFpmSuccNonB

%lation)Ren_S_CR(UtraStr_M_IFHO 100

Figure 124 Inter Frequency Handover Success Rate for Streaming

3.3.6.3 Inter Radio Access Technology (GSM) Handover Statistics

In this section, the equations for Inter Radio Access Technology (GSM)Handover success rate per service are covered.

3.3.6.3.1 Inter Radio Access Technology (GSM) Handover Success Rate for Speech

The following metric measures hard handover success rate between UtranCelland target GSM cell for speech calls.

)Re(ReRe

)Re(ReRe

100Re

lationGsmpeechpmAttLbhoSlation)(GsmSbHoSpeechpmNoAttOutlation) + ch(GsmIratHoSpeepmNoAttOut

lationGsmSpeechpmSuccLbholation)eech(GsmsOutSbHoSppmNoSucceslation) + Speech(GsmsOutIratHopmNoSucces

%lation)O_S_CR(GsmSp_M_IRATH

Figure 125 Inter Radio Access Technology (GSM) Handover Success Rate for Speech

Note: The load based handover part of this formula is only applicable for P7.1

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Radio Network KPI

3.3.6.3.2 Inter Radio Access Technology (GSM) Handover Success Rate forCircuit-Switched Streaming (CS 57)

The following metric measures hard handover success rate between UtranCelland target GSM cell for CS streaming calls.

lation)Re(GsmIratHoCspmNoAttOutlation)Re(GsmCssOutIratHopmNoSucces

%lation)ReO_S_CR(GsmCS_M_IRATH

5757

100

Figure 126 Inter Radio Access Technology (GSM) Handover Success Ratefor Circuit-Switched Streaming (CS 57)

3.3.6.3.3 Inter Radio Access Technology (GSM) Handover Success Rate for Multi-RAB

The following metric measures hard handover success rate between UtranCelland target GSM cell for Multi-RAB calls.

lation)Rei(GsmIratHoMultpmNoAttOutlation)ReMulti(GsmsOutIratHopmNoSucces

%lation)ReGsmATHO_S_CR(Multi_M_IR 100

Figure 127 Inter Radio Access Technology (GSM) Handover Success Ratefor Multi-RAB

3.3.6.3.4 Inter Radio Access Technology (GSM) Cell Change Success Rate for PSInteractive

The following metric measures cell change success rate between UtranCell andtarget GSM cell for PS calls when the UE successfully returns to UtranCell.

lation)RetCcAtt(GsmpmNoOutIralation)Re(GsmtCcSuccesspmNoOutIra

%lation)ReS_CR(Gsm_M_IRATCC_intP 100

Figure 128 Inter Radio Access Technology (GSM) Cell Change SuccessRate for PS Interactive

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Radio Network KPI

3.3.6.3.5 Inter Radio Access Technology (GSM) Cell Change Success Rate for PSInteractive on DCH

The following metric measures cell change success rate between UtranCelland target GSM cell for PS calls on DCH when the UE successfully returnsto UtranCell.

lation)ResmtCcAttHs(GpmNoOutIra)lationReGsm(tCcAttpmNoOutIralation)ReHs(GsmtCcSuccesspmNoOutIra)lationReGsm(tCcSuccesspmNoOutIra

%lation)RemCC_S_CR(GsDCH_M_IRATintP 100

Figure 129 Inter Radio Access Technology (GSM) Cell Change SuccessRate for PS Interactive on DCH

3.3.6.3.6 Inter Radio Access Technology (GSM) Cell Change Success Rate for PSInteractive on HS

The following metric measures cell change success rate between UtranCelland target GSM cell for PS calls on HS when the UE successfully returns toUtranCell.

lation)ResmtCcAttHs(GpmNoOutIralation)ReHs(GsmtCcSuccesspmNoOutIra

%lation)ReC_S_CR(GsmHS_M_IRATCintP 100

Figure 130 Inter Radio Access Technology (GSM) Cell Change SuccessRate for PS Interactive on HS

3.3.6.3.7 Inter Radio Access Technology (GSM) Cell Change Success Rate for PSInteractive on EUL

The following metric measures cell change success rate between UtranCelland target GSM cell for PS calls on EUL when the UE successfully returnsto UtranCell.

lation)ReGsmtCcAttEul(pmNoOutIralation)ReEul(GsmtCcSuccesspmNoOutIra

%lation)RemCC_S_CR(GsEUL_M_IRATintP 100

Figure 131 Inter Radio Access Technology (GSM) Cell Change SuccessRate for PS Interactive on EUL

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Radio Network KPI

3.3.6.4 HS Mobility Statistics

3.3.6.4.1 PS Interactive HS Cell Change success rate

The following metric measures the success rate for HS Cell Change in target cell

ell)mpt(UtranCpmHsCcAtteell)ess(UtranCpmHsCcSucc

%UtranCell)_M_HSCC_S(intP 100

Figure 132 PS Interactive HS Cell Change success rate

3.3.6.4.2 PS Streaming HS Cell Change success rate

The following metric measures the success rate for HS Cell Change in target cell

)UtranCell(mptamHsCcAttepmNoPsStre)UtranCell(essamHsCcSuccpmNoPsStre

%)UtranCell(S_HSCC_M_Pstr 100

Figure 133 PS Streaming HS Cell Change success rate

3.3.6.4.3 PS Interactive reconfiguration HS to DCH success rate

The following metric measures the success rate for HS to DCH reconfiguration

anCell)ttempt(UtrpmHsToDchAanCell)uccess(UtrpmHsToDchS

%Cell)RC_S(Utran_M_HStoDCHintP 100

Figure 134 PS Interactive reconfiguration HS to DCH success rate

3.3.6.4.4 PS Streaming reconfiguration HS to DCH success rate

The following metric measures the success rate for HS to DCH reconfiguration

Cell)empt(UtranHsToDchAttpmPsStreamCell)cess(UtranHsToDchSucpmPsStream

%tranCell)oDCHRC_S(UPstr_M_HSt 100

Figure 135 PS Streaming reconfiguration HS to DCH success rate

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Radio Network KPI

3.3.6.5 EUL Mobility Statistics

3.3.6.5.1 PS Interactive EUL Cell Change success rate

The following metric measures the success rate for EUL Cell Change in targetcell

anCell)ttempt(UtrpmNoEulCcAanCell)uccess(UtrpmNoEulCcS

%ll)_S(UtranCePS_M_EULCC 100

Figure 136 PS Interactive EUL Cell Change success rate

3.3.6.5.2 PS Interactive reconfiguration EUL to DCH success rate

The following metric measures the success rate for EUL to DCH reconfiguration

ranCell)Attempt(UtpmEulToDchranCell)Success(UtpmEulToDch

%ranCell)DCHRC_S(UtPS_M_EULto 100

Figure 137 PS Interactive reconfiguration EUL to DCH success rate

3.3.6.6 URA_PCH Mobility Statistics

3.3.6.6.1 URA Update success rate

The following metric measures the URA Update success rate

ranCell)Success(UtpmNoUraUpdranCell)Success(UtpmNoUraUpd

%l)S(UtranCelUra_M_Upd_ 100

Figure 138 URA Update success rate

3.3.6.7 Core Network Hard Handover

3.3.6.7.1 Core Network Hard Handover success rate speech, incoming calls

The following metric measures the Core Network hard handover success ratefor incoming speech calls.

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Radio Network KPI

h(IurLink)CnhhoSpeecpmNoAttInc)ch(IurLinkcCnhhoSpeepmNoSuccIn

%nk)In_S(IurLiSp_M_CNHHO 100

Figure 139 Core Network Hard Handover success rate speech, incoming calls

3.3.6.7.2 Core Network Hard Handover success rate speech, outgoing calls

The following metric measures the Core Network hard handover success ratefor outgoing speech calls.

lation)Reh(UtranCnhhoSpeecpmNoAttOutlation)Rech(UtrantCnhhoSpeepmNoSuccOu

%lation)RenOut_S(UtraSp_M_CNHHO 100

Figure 140 Core Network Hard Handover success rate speech, outgoing calls

3.3.6.7.3 Core Network Hard Handover success rate CS other than speech, incomingcalls

The following metric measures the Core Network hard handover success ratefor incoming speech calls.

Link)Speech(IurCnhhoCsNonpmNoAttIncrLink)nSpeech(IucCnhhoCsNopmNoSuccIn

%nk)In_S(IurLiCS_M_CNHHO 100

Figure 141 Core Network Hard Handover success rate CS other than speech,incoming calls

3.3.6.7.4 Core Network Hard Handover success rate CS other than speech, outgoingcalls

The following metric measures the Core Network hard handover success ratefor outgoing speech calls.

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lation)ReanSpeech(UtrCnhhoCsNonpmNoAttOutlation)RerannSpeech(UttCnhhoCsNopmNoSuccOu

%lation)RenOut_S(UtraCS_M_CNHHO 100

Figure 142 Core Network Hard Handover success rate CS other than speech,outgoing calls

3.3.7 Availability

3.3.7.1 Cell Availability

The length of time in seconds that a cell is available for service is defined ascell availability. For example, cell availability during 24 hour period can becalculated as follows

360024360024

100

tranCell)time Man(UpmCellDownUtranCell)ntimeAuto((pmCellDow

%ll)Av(UtranCe

Figure 143 Cell Availability

where pmCellDowntimeAuto measures the length of time in seconds duringwhich a cell is unavailable for service due to an unplanned downtime andpmCellDowntimeMan measures the length of time in seconds during which acell is unavailable for service due to a planned downtime.

Note: The reported value of pmCellDowntimeAuto and pmCellDowntimeMan for each 15 minute period must be aggregated over the 24 hourobservation period.

3.3.7.2 Cell Unavailability due to Unplanned Down Time

The length of time in seconds that a cell is unavailable due to malfunctionis called unplanned downtime. This period can be measured bypmCellDowntimeAuto(UtranCell) in seconds. For example, the followingformulae can be used to measure the percentage of unplanned downtime in 24hour period.

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Radio Network KPI

360024

100

tranCell)timeAuto(UpmCellDown

%ranCell)Av_Auto(Ut

Figure 144 Cell Unavailability due to Unplanned Down Time

Note: The reported value of pmCellDowntimeAuto for each 15 minuteperiod must be aggregated over the 24 hour observation period in theabove equation.

3.3.7.3 Cell Unavailability due to Planned Down Time

The length of time in seconds that a cell is unavailable due tomaintenance is called planned downtime. This period can be measured bypmCellDowntimeMan(UtranCell) in seconds. For example, the followingformulae can be used to measure the percentage of planned downtime in 24hour period.

360024

100

ranCell)timeMan(UtpmCellDown

%anCell)Av_Man(Utr

Figure 145 Cell Unavailability due to Planned Down Time

Note: The value of pmCellDowntimeMan(UtranCell) for each 15 minuteperiod must be aggregated over 24 hour observation period in theabove equation.

3.3.7.4 Cell HS Availability

The length of time in seconds that a cell is available for Packet InteractiveHS service is defined as cell HS availability. For example, cell HS availabilityduring 24 hour period can be calculated as follows

360024360024

100

sch)me Man(HsdpmHsDowntidsch)imeAuto(Hs(pmHsDownt

%ch)Av_HS(Hsds

Figure 146 Cell HS Availability

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where pmHsDowntimeAuto measures the length of time in seconds duringwhich a cell is unavailable for HS service due to an unplanned downtime andpmHsDowntimeMan measures the length of time in seconds during which a cellis unavailable for HS service due to a planned downtime.

Note: The reported value of pmHsDowntimeAuto and pmHsDowntimeManfor each 15 minute period must be aggregated over the 24 hourobservation period.

3.3.7.5 Cell HS Unavailability due to Unplanned Down Time

The length of time in seconds that a cell is unavailable for HS service due tomalfunction is called unplanned HS downtime. This period can be measuredby pHsDowntimeAuto(Hsdsch) in seconds. For example, the followingformulae can be used to measure the percentage of unplanned HS downtimein 24 hour period.

360024

100

sch)meAuto(HsdpmHsDownti

%(Hsdsch)Av_Auto_HS

Figure 147 Cell HS Unavailability due to Unplanned Down Time

Note: The reported value of pmHsDowntimeAuto for each 15 minute periodmust be aggregated over the 24 hour observation period in the aboveequation.

3.3.7.6 Cell HS Unavailability due to Planned Down Time

The length of time in seconds that a cell is unavailable for HS service due tomaintenance is called planned HS downtime. This period can be measuredby pmHsDowntimeMan(Hsdsch) in seconds. For example, the followingformulae can be used to measure the percentage of planned downtime in 24hour period.

360024

100

ch)meMan(HsdspmHsDownti

%Hsdsch)Av_Man_HS(

Figure 148 Cell HS Unavailability due to Planned Down Time

Note: The value of pmHsDowntimeMan(Hsdsch) for each 15 minute periodmust be aggregated over 24 hour observation period in the aboveequation.

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Radio Network KPI

3.3.7.7 Cell EUL Unavailability due to Unplanned Down Time

The length of time in seconds that a cell is unavailable for EUL service due tomalfunction is called unplanned EUL downtime. This period can be measuredby pmEulDowntimeAuto(Eul) in seconds. For example, the followingformula can be used to measure the percentage of unplanned EUL downtimein 24 hour period.

360024

100

l)imeAuto(EupmEulDownt

%L(Eul)Av_Auto_EU

Figure 149 Cell EUL Unavailability due to Unplanned Down Time

Note: The reported value of pmEulDowntimeAuto(Eul) for each 15minute period must be aggregated over the 24 hour observation periodin the above equation.

3.3.7.8 Cell EUL Unavailability due to Planned Down Time

The length of time in seconds that a cell is unavailable for EUL service due tomaintenance is called planned EUL downtime. This period can be measured bypmEulDowntimeMan(Eul) in seconds. For example, the following formulacan be used to measure the percentage of planned downtime in 24 hour period.

360024

100

)imeMan(EulpmEulDownt

%(Eul)Av_Man_EUL

Figure 150 Cell EUL Unavailability due to Planned Down Time

Note: The value of pmEulDowntimeMan(Eul) for each 15 minute periodmust be aggregated over 24 hour observation period in the aboveequation.

3.3.7.9 Cell MBMS Unavailability due to Unplanned Down Time

The length of time in seconds that a cell is unavailable for MBMS servicedue to malfunction is called unplanned MBMS downtime. This period can bemeasured by pmMbmsDowntimeAuto(MbmsCch) in seconds. For example,the following formula can be used to measure the percentage of unplannedMBMS downtime in 24 hour period.

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360024

100

bmsCch)timeAuto(MpmMbmsDown

%)MS(MbmsCchAv_Auto_MB

Figure 151 Cell MBMS Unavailability due to Planned Down Time

Note: The reported value of pmMbmsDowntimeAuto(MbmsCch) for each 15minute period must be aggregated over the 24 hour observation periodin the above equation.

3.3.7.10 Cell MBMS Unavailability due to Planned Down Time

The length of time in seconds that a cell is unavailable for MBMS service due tomaintenance is called planned MBMS downtime. This period can be measuredby pmMbmsDowntimeMan(MbmsCch) in seconds. For example, the followingformula can be used to measure the percentage of planned downtime in 24hour period.

360024

100

msCch)timeMan(MbpmMbmsDown

%S(MbmsCch)Av_Man_MBM

Figure 152 Cell Mbms Unavailability due to Planned Down Time

Note: The value of pmMbmsDowntimeMan(MbmsCch) for each 15 minuteperiod must be aggregated over 24 hour observation period in theabove equation.

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Glossary

4 Glossary

All acronyms and terms used in this description are listed in the Glossary ofTerms and Acronyms.

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urn:x-ericsson:r2:reg-doc:*-*:*:*?title=Glossary of Terms and Acronyms

urn:x-ericsson:r2:reg-doc:*-*:*:*?title=Glossary of Terms and Acronyms

Radio Network KPI

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Appendix A

5 Appendix A

5.1 Channel element utilization report in OSS

The purpose of the channel element utilization formulas are for theoperator to be able to make a rough forecast which RBSs need to geta license or hardware expansion during a coming time period. Thealarms DownLinkBaseBandPool_DlHwLessThanDlcapacity andUpLinkBaseBandPool_UlHwLessThanDlcapacity indicate if hardwareis the bottleneck.

5.1.1 Formulas for Channel Element Utilization DL

The relative channel element load for DL is calculated as:

%DL

sPoolLicensedCE00)dlHwAdm/1DL

backoff(1100

eapacityDlCpmSamplesC

ityDlCepmSumCapacoad_CE_DLRelative_L

Figure 153

Where the LicensedCEsPoolDL is calculated differently depending on if oneor two baseband pools are configured in the RBS.

RBS with one base band pool configured:

) nlink,lementsDowbsChannelEeCapacityRmin(licens DL

sPoolLicensedCE knlinlementsDowbsChannelEavailableR

RBS with two base band pool configured is calculated per base band pool:

• First base band pool:

0)BbPool2/10dlLicFract-(1

xnlink)lementsDowbsChannelEavailableR nlink,lementsdowbsChannelEeCapacityRmin(licens DL

sPoolLicensedCE

• Second base band pool:

00)tBbPool2/1(dlLicFrac

xnlink)lementsDowbsChannelEavailableR nlink,lementsdowbsChannelEeCapacityRmin(licens DL

sPoolLicensedCE

Note: These formulas should not be computed/have no relevance if it isthe hardware and not the license that is limiting the capacity. This isindicated by alarm DownLinkBaseBandPool_DlHwLessThanDlcapacity

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Where the parameter backoffDLis a parameter for tuning of the model.backoffDL should be tuned so that a relative load of 100% is representing thelevel where KPIs become unacceptable. It can be tuned by correlating relativeload with admission rejects due to lack of channel elements. backoffDL isconfigurable and takes the default values as in Table 4 on page 62.

Table 4 Default value for parameter backoffDL

LicensedCEsPoolDL backoffDL

16 0.5

32 0.35

64 0.25

128 0.15

256 0.1

512 0.05

768 0.05

Note: Values in between a linear interpolation should be used.

5.1.2 Formulas for Channel Element Utilization UL

The relative channel element load for UL is calculated as:

%UL

sPoolLicensedCE00)ulHwAdm/1UL

backoff(1100

eapacityUlCpmSamplesC

ityUlCepmSumCapacoad_CE_ULRelative_L

Where the LicensedCEsPoolUL is calculated differently depending on if oneor two baseband pools are configured in the RBS.

RBS with one base band pool configured:

) ink,lementsUplbsChannelEeCapacityRmin(licens UL

sPoolLicensedCE kinlementsUplbsChannelEavailableR

RBS with two base band pool configured is calculated per base band pool:

• First base band pool:

0)BbPool2/10ulLicFract-(1

xink)lementsUplbsChannelEavailableR ink,lementsUplbsChannelEeCapacityRmin(licens UL

sPoolLicensedCE

• Second base band pool:

00)tBbPool2/1(ulLicFrac

xink)lementsUplbsChannelEavailableR ink,lementsUplbsChannelEeCapacityRmin(licens UL

sPoolLicensedCE

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Appendix A

Note: These formulas should not be computed/have no relevance if it isthe hardware and not the license that is limiting the capacity. This isindicated by alarm UpLinkBaseBandPool_UlHwLessThanUlcapacity.

Where the parameter backoffUL is a parameter for tuning of the model.backoffUL should be tuned so that a relative load of 100% is representing thelevel where KPIs become unacceptable. It can be tuned by correlating relativeload with admission rejects due to lack of channel elements. backoffUL isconfigurable and takes the default values as in Table 5 on page 63.

Table 5 Default values for backoffUL

LicensedCEsPoolUL backoffUL

16 0.5

32 0.35

64 0.25

128 0.15

256 0.1

512 0.05

768 0.05

Note: Values in between a linear interpolation should be used.

5.2 Channel element blocking report in OSS

The purpose of the channel element blocking report is for the operator to beable to identify which RBSs need to be upgraded urgently. The report presentsnumber of RRC attempts and RAB set-up attempts blocked by admissioncontrol due to lack of hardware. Also the blocking rate is presented.

When delayed activation of capacity control is activated, no blocking occurs dueto the lack of licenses. During this state, the measured blocking as given bythe formulas should be interpreted with care and it should be understood thatthe blocking may increase as the delayed activation state ceases. The alarmsDownlinkBasebandPool_DlHwUsageExceedsDlLicenseLevel andUplinkBasebandPool_UlHwUsageExceedsUlLicenseLevel indicate ifdelayed activation of capacity control is activated.

5.2.1 Formulas for RRC blocking due to lack of channel elements

The total number of blocked RRC connection attempts due to lack of channelelements is given by:

ReqHwRrcConnectpmNoFailedng_CERRC_blocki

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The RRC blocking due to channel elements is calculated as:

%100ConnectReqpmTotNoRrc

ReqHwRrcConnectpmNoFailedng_CE_rateRRC_blocki

5.2.2 Formulas for RAB blocking due to lack of channel elements

5.2.2.1 Downlink

The total number of blocked RAB establishment attempts due to lack of DLchannel elements is given by:

wBestmptLackDlHRabEstAttepmNoFailedng_CE_DLRAB_blocki

The RAB blocking rate due to lack of channel elements in the DL is calculatedas:

100%tAttemptTotNoRabEs

wBestmptLackDlHRabEstAttepmNoFailed_DLng_CE_rateRAB_blocki

where

tAttemptTotNoRabEs pmNoRabEstablishAttemptSpeech+ pmNoRabEstablishAttemptCs64+ pmNoRabEstablishAttemptCs57+ pmNoRabEstablishAttemptPacketInteractive+pmNoRabEstablishAttemptPacketStream+pmNoRabEstablishAttemptPacketStream128+ pmNoRabEstAttemptPsStreamHs

5.2.2.2 Uplink

The total number of blocked RAB establishment attempts due to lack of ULchannel elements is given by:

wBestmptLackUlHRabEstAttepmNoFailedng_CE_ULRAB_blocki

The RAB blocking rate due to lack of channel elements in the UL is calculatedas:

100%tAttemptTotNoRabEs

wBestmptLackUlHRabEstAttepmNoFailed_ULng_CE_rateRAB_blocki

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Reference List

Reference List

[1] Performance Statistics, RNC, 88/1551-AXD 105 03/1

[2] Performance Statistics - Flowcharts for counters, RNC, 103/1551-AXD105 03/1

[3] General Performance Event Handling, RNC, 104/1551-AXD 105 03/1

[4] Performance Statistics, RBS, 112/1551-HRB 105 102/1

[5] Performance Statistics - Flowcharts for counters, RBS, 80/1551-HRB105 102/1

[6] Radio Environment Statistics, 106/1553-HSD 101 02/6

[7] Performance Management in WCDMA, 116/1553-HSD 101 02/7

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3 g kpi ericsson

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