perfermance measurements

Performance Measurements

DN9813612Issue 10-0 en

# Nokia Siemens Networks 1 (22)

BSC3119Nokia BSC/TCSM, Rel. S12, ProductDocumentation, v.4

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2 (22) # Nokia Siemens Networks DN9813612Issue 10-0 en


Contents

Contents 3

List of tables 4

List of figures 5

Summary of changes 7

1 Performance measurements 91.1 Call control measurements (CSW) 111.2 GPRS measurements (PSW) 171.3 Transmission measurements 181.4 Observations 21



Contents

List of tables

Table 1. Example of a counter table 9

Table 2. Transmission measurement and equipment types 19



List of figures



List of figures

Summary of changes

Changes between document issues are cumulative. Therefore, the latestdocument issue contains all changes made to previous issues.

Changes made between issues 10 and 9–1

Information on the counter numbering of 21 Radio Measurement Report,24 Dropped Call Observation, and 50 BSC Level Clear CodeMeasurement has been added.

New fields Trigger type and Sampling interval have been added to thetable Example of a counter table, and the description of the Unit field hasbeen revised.

Information on spare counters and a reference to NOLS DocumentationCenter's Reference Information Service has been added.

Three new call control measurement types have been added: 106 CSDTM Measurement, 107 AMR RX Quality Measurement, and 108 DFCASAIC Measurement.

One new GPRS measurement type has been added: 105 PS DTMMeasurement.

One observation type has been removed because it is no longersupported: 23 ISDN Abis Observation.

26 Position Based Services Observation has been changed into 30Position Based Services Observation.

References to online observations have been removed because onlineobservations are no longer supported.

Reference to TCSM2 has been removed.



Summary of changes

Editorial changes have been made.

Changes made between issues 9–2 and 9–1

The description of Drop Call Breakdown Observation has been updated.

Changes made between issues 9–1 and 9

A new call control measurement, 109 Soft Channel CapacityMeasurement, has been added.



1 Performance measurements

Counters are numbered according to the measurement type XXXYYY,where XXX is the measurement type and YYY is the counter number of themeasurement. 21 Radio Measurement Report, 24 Dropped CallObservation, and 50 BSC Level Clear Code Measurement are exceptions:their numbering is XXXYYYY.

Information about each counter, including its name, number, description,and other details are presented in a table. The table fields are explained inthe table Example of a counter table.

Table 1. Example of a counter table

Number

Name

Release

Definition updated

Number of the counter

Name of the counter

Original release. For spare counters,indicates the release where the sparecounter was created in the BSC.

Release where the counter was updated. Forspare counters, this field may includeseveral entries. The release where the sparecounter was made official is followed by theexplanation (Name changed).

Trigger points Includes references to signalling charts if themeasurement has signalling charts.

Description Explains what the counter is for.

Updated Informs when the counter is updated.

Trigger type Specifies the type of events that trigger the counter:event, sample, or duration.

Dependencies with other counters/PI(s) Informs if the counter is interdependent with othercounters.

Feature Specifies the software product the counter is relatedto.



Performance measurements

Table 1. Example of a counter table (cont.)

Number

Name

Release

Definition updated

Number of the counter

Name of the counter

Original release. For spare counters,indicates the release where the sparecounter was created in the BSC.

Release where the counter was updated. Forspare counters, this field may includeseveral entries. The release where the sparecounter was made official is followed by theexplanation (Name changed).

Example values Shows examples of the values the counter canreceive.

Impact Explains the impact, for example, call cleared.

Reason for the impact Explains the reason for the impact.

Logical type Can be, for example, average or peak. If the logicaltype has not been defined in the table, the counter isa basic counter.

Note! The denominator counter value is always >0.

Unit Unit in which the values of the counter are given.Most often the unit is an integer number. It can alsobe, for example, per cent, kB, ms.

Range Limits to the values the counter can receive.

Sampling interval If the trigger type is sample, specifies the interval atwhich the samples are taken.

The fields of the counter tables are filled in by taking into account thedifferent nature of each measurement and observation. For this reason,the tables may vary in size and content. For example, if example valuesare not given for a counter, the field Example values is not included in theactual counter table.

In some cases there can be counter tables with the same counter number.In such cases, all the information is technically coded in one counter, butseparated in the documentation to improve readability.

Measurements may also include spare counters. They are used forimplementing new counters in the BSC and Nokia NetAct for temporaryuse between main releases. When a new counter is needed between mainreleases, the chosen spare counter is put into use in the BSC and it startscollecting data to NetAct. In the BSC documentation, the counter receives



a definition, but its name remains as SPARExxxxxx. In the next NetActmain release, the counter is made official, that is, it receives a propername. After this it is included also in the BSC documentation with a propername.

Measurements and observations are divided into the following groupsaccording to their function:

. Call control measurements (CSW)

. GPRS measurements (PSW)

. Transmission measurements

. Observations

In general, measurements consist of several counters that measurevarious matters.

Counters essential for the operation of the network are so-called publiccounters, whereas counters for special situations are so-called expertcounters. Public counters are documented with the accuracy of signallingcharts and trigger points. Measurements that include signalling charts aremarked with the text (incl. signalling charts) after the name of thedocument.

Optional measurements are marked with (optional) after the name of thedocument.

BSC counter information is also directly available and accessible via theReference Information Service in NOLS Documentation Center. Theinformation in the Reference Information Service is updated morefrequently than the BSC NED browser environment.

1.1 Call control measurements (CSW)

Call control measurements measure call-related issues, such ascongestion on a specific channel or area.

Call control measurements can be divided into two groups:

. circuit-switched (CSW) measurements

. packet-switched (PSW) measurements




The packet-switched measurements are referred to as GPRSmeasurements. For more information, see 1.2 GPRS measurements(PSW).

No Measurement/optionality Purpose/function Level/role/application

1 Traffic Measurement (incl. signallingcharts)

Registers information related to theSDCCH and TCHs. Provides informationon, for example, seizure attempts andsuccessful seizures for the SDCCH andthe TCH.

BTS-level

2 Resource Availability Measurement Registers information on the availabilityof TCH and SDCCH. Providesinformation on, for example, TCHcongestion time and the peak number ofbusy TCHs and SDCCHs.

BTS-level

3 Resource Access Measurement (incl.signalling charts)

Registers information on all CCCHs ofthe BSC. Indicates the number of pagingmessages sent to the BTS, andsuccessful seizures for mobile-originated(MO) and mobile-terminated (MT) calls.

BTS+TRX -level

4 Handover Measurement (incl.signalling charts)

Registers information on the number ofhandovers (HO) controlled by the MSCor the BSC. Records the number of theincoming, outgoing, or intra-cell HOs,and the number of successful andunsuccessful attempts, seizures, andHOs. The HOs are sorted according todirection, where appropriate.

BTS-level

5 Power Control Measurement Registers information on how the BSCcontrols the power level and signalquality of the MS and the BTS. Providesinformation, for example, on the qualityand strength of the signals both in uplinkand downlink directions.

BTS+TRX -level

6 Load Measurement Registers information on the peak andthe average load rate of the computerunits.

BSC-level

7 Availability Measurement Registers information on the restart andthe disconnection times of the computerunits. Used for field reporting.

BSC-level

8 OSI/X.25 Measurements Provides information on the four lowestlayers of the OSI stack, that is,information on how the connectionbetween the BSC and Nokia NetActfunctions.

OSI-channel+Unit nbr-level




13 Undefined Adjacent Cell Measurement Registers statistics on cells, which havenot been defined as adjacent cells butare among those six neighbouring cellsthat the MS receives best. Providesinformation on the signal strength ofthose cells.

BTS-level

14 RX Quality Statistics Measurement(optional)

Registers information both in uplink anddownlink directions on the TRXs.Provides information on the RX qualityband frequencies with the accuracy ofone TRX, BTS or BSC. The RX qualityfrequencies are collected only of theTCHs.

BTS+TRX -level

15 Handover Adjacent Cell Measurement(incl. signalling charts) (optional)

Registers information on handoverattempts, successful handovers andfailed handovers due to lack of radioresources. Provides information on howhandovers between different cells aredivided.

BTS-level (+HOcategory leveloptionally

50 BSC Level Clear Code Measurement Collects statistics on clear codes for theBSC during calls. Registers failures thathave occurred during a call (signalling orconversation). Provides information onthe quality of service in the BSC with theaccuracy of a cell.

BSC-level

51 BSC Level Clear Code (PM)Measurement(incl. signalling charts)

Provides information on transactions inthe BSC, for example, location updateand failure sum counters. Theinformation is especially relevant fromthe point of view of determining theservice level.

BSC-level

52 Underlay Overlay StatisticsMeasurement (incl. signalling charts)(optional)

Registers information on the performanceof the Intelligent Underlay-Overlayprocedure. Provides information with theaccuracy of one TRX.

BTS+TRX -level(+freg. group)

53 RX Level Statistics Measurement(optional)

Registers information on the level andquality of RX signal on both uplink anddownlink direction. Provides theinformation in six classes per RX qualityband in both uplink and downlinkdirections.

BTS+TRX -level





54 Link Balance per MS ClassmarkMeasurement (optional)

Registers information on the link balancein the network, that is, the differencebetween the uplink and downlink signallevels. The link balance difference isdivided into 11 subclasses: 6 classes fornegative imbalance, one class forbalance and 5 classes for positiveimbalance. The measurement providesthe information with the accuracy of onecell.

BTS-level

55 Timing Advance StatisticsMeasurement (optional)

Registers information on the timingadvance during calls. With thisinformation you can estimate thedistribution of the subscribers within acell area. The measurement provides theinformation with the accuracy of eitherone BTS or one BSC.

The timing advance values are dividedinto ten subclasses. The user sets theranges for the classes, for example, therange can be denser in a micro cell thanin a macro cell.

BTS-level

56 Resource Availability per BSCMeasurement

Registers information on the availabilityof the TRXs on the BSC level. Thenumber of the TRXs which are notavailable is divided into three categoriesaccording to what causes theunavailability: the user, internal reasons,and external reasons.

BSC-level

57 BSC Level Clear Code (SERLEV)Measurement (incl. signalling charts)

Registers statistics about clear codes ina BSC during calls. Provides generalinformation on transactions in the BSC.

BTS-level

58 MS Speed Detection Measurement(optional)

Collects information on the speed of MS.Provides information on slow moving andfast moving MSs. The information iscollected for each cell. The MS speedstatistics is collected only from the TCHs.There are three MS speed classes.

BTS-level

59 Dual Band Measurement (optional) Provides information on the trafficdistribution, that is, on TCH holding timesand reservations of single and dual bandsubscribers. The information is collectedfor each cell.

BTS-level

60 C/I Ratio Measurement (optional) Collects statistics on the degree of theinterference by measuring traffic intensity(Erlang) on a specified C/I (carrier/interference) ratio band. Estimates thelevel of the potential co- and adjacentchannel interference in the radio network.

BTS-level (LAC-CI)




61 Hot Spot Measurement (optional) Registers information on the adjacent cellRX levels and on timing advancedistribution. Finds out the highest trafficdistribution spots in the mobile network.With this measurement you can retrieveinformation that indicates the places inthe network where more capacity isneeded.

BTS+TRX -level(LAC-CI)

67 High Speed Data Measurement(optional)

Collects statistics about radio resourcesused for fulfilling High Speed CircuitSwitched Data (HSCSD) requests.Measures the functioning of the HSCSDand 14.4 kbit/s Data Services softwareproducts.

BTS-level

70 Channel Finder Measurement(optional)

Registers statistics on cells which havenot been defined as adjacent cells, butare among those six neighbouring cellsthat the MS receives best. Providesinformation on the signal strengthstandard deviation, and class boundariesof those cells.

BTS-level

71 MS Capability Indication Measurement(incl. signalling charts) (optional)

Provides cell-specific information on thecapabilities of the MSs.

BTS-level

75 Defined Adjacent Cell Measurement(optional)

Registers statistics on defined cells. Thismeasurement data is collected in celllevel.

BTS-level

77 FER Measurement (optional) Registers information both in uplink anddownlink directions on the TRXs.

BTS+TRX+codec -level

78 Position Based ServicesMeasurement (optional)

Registers location requests grouped byLCS QoS, location responses groupedby accuracy, and error cases.

BTS-level (LAC-CI)

89 Reversed Hunting Measurement(optional)

Registers information on the BSS, whichallocates the circuit needed directlybased on the radio interface resources.

A interface pool-level

92 Non-BCCH Layer Offset Measurement(optional)

Registers link budget differences in theserving cell.

BTS-level

93 UTRAN Handover Adjacent CellMeasurement (incl. signalling charts)(optional)

Registers statistics about the distributionof inter-system handovers betweendifferent cells.

BTS-level

94 UTRAN Neighbouring Cell SignalLevel Measurement (optional)

Registers information on signal levels ofWCDMA RAN cell in the neighbourhoodof a GSM serving cell.

BTS-level





99 Total FEP Measurement (optional) Collects statistics on the cumulated sumof frame erasure probability (FEP) valuesfor a certain serving cell - neighbouringcell pair. Includes separate counters forco-channel and adjacent channelinterference.

BTS-level

100 DFCA Measurement (optional) Collects statistics on the performance ofthe DFCA application software. The datais collected at cell level separately foreach connection type (FR/EFR, HR,14.4, AMR FR, and AMR HR).

BTS-level +connection type

101 DFCA Assignment Measurement(optional)

Collects statistics on the usage of DFCAchannels at cell level. The assignmentcounters are updated whenever thecorresponding MA list and MAIO areused in a DFCA assignment.

BTS-level

102 BSC-BSC Measurement (optional) Collects statistics on the inter-BSCcommunication related to the DFCAapplication software. The counters of thismeasurement record information onaverage and peak delay between theRadio Resource Managers in separateBSCs.

Signalling point code

103 WPS Measurement (optional) Registers information on the performanceof traffic channel allocation and queuingalgorithms in granting priority access toWPS users.

BTS-level

104 IMSI Based Handover Measurement(optional)

Collects statistics on the IMSI-basedhandover attempts and failures for eachAuthorised Network (ANE). There areseparate counters for GSM and UTRANnetworks.

BTS-level

106 CS DTM Measurement (incl. signallingcharts) (optional)

Collects statistics on Dual Transfer Mode(DTM). Mainly collects MS-initiated DTMcall establishment information and CSconnection-related information of a DTMcall.

BTS-level

107 AMR RX Quality Measurement(optional)

Collects statistics on uplink and downlinkRX quality for each AMR bitrate. Theinformation is collected from eachtransceiver (TRX) separately.

BTS+TRX -level

108 DFCA SAIC Measurement(optional) Collects statistics on the performance ofthe DFCA application software forconnections of SAIC-capable mobiles.The data is collected at cell levelseparately for each connection type (FR/EFR, HR, 14.4, AMR FR, and AMR HR).

BTS-level +connection type




109 Soft Channel Capacity Measurement(optional)

Collects statistics on the availability oftraffic channels (TCH) in the BCSUobject level. The time congestion ofTCHs and the average and peaknumbers of busy TCHs are measured.

BCSU LogicalAddress

1.2 GPRS measurements (PSW)

GPRS measurements are packet-switched (PSW) call controlmeasurements. GPRS measurements measure call-related issues, suchas congestion on a specific channel or area. For circuit-switched (CSW)measurements, see 1.1 Call control measurements (CSW).


72 Packet Control Unit Measurement(incl. signalling charts)

Provides cell-level information on thefunctions in charge of the PacketControl Unit (PCU). The countersconcentrate on the amount of packet-traffic related transactions, datathroughput quality of provided service(failed/passed transactions), and theavailability of service (for example,congestion, load of interfaces). Theneed to get more capacity is indicatedwell in advance.

BTS-level

73 RLC Blocks per TRX Measurement Provides TRX-specific information ondata throughput quality based on theRLC/MAC blocks. The information canbe used for parameterisation of TRXcapacity.

BTS+TRX -level

74 Frame Relay Measurement Provides bearer channel and PVC(Permanent Virtual Connection) specificinformation on the proper working of theframe relay between the PCU and theSGSN.

Bearer-level

76 Dynamic Abis Measurement (optional) Registers information on theunsuccessful call establishment andpeak and average usage of dynamicabis pool.

Abis pool-level





79 Coding Scheme Measurement(optional)

Registers information about the amountof data transferred to uplink anddownlink directions in the radio interfaceusing the different EGPRS modulationand coding schemes (MCS) and GPRScoding schemes CS-3 and CS-4.

BTS+coding scheme -level

90 Quality of Service Measurement Registers information related to priority.Provides information on, for example,the number of RLC blocks and TBFs.

Segment+QoS priorityclass -level

91 PBCCH Availability Measurement Registers availability of packet controlchannels.

BTS-level

95 GPRS Cell Reselection Measurement(optional)

Registers information about the sourceand target cell, the number of cellreselection attempts for various causes,the number of successful NCCRprocedures, and the number of failuresfor various failure reasons.

BTS-level + LAC-CI

96 GPRS RX Level and QualityMeasurement (optional)

Collects RX quality levels per each RXclass, and quality information per codingscheme.

BTS + TRX + codingscheme

97 Enhanced Quality of ServiceMeasurement

Records information about PFCprocedures, transferred data, and qualitycontrol.

SEG + TC-THP-PFI+ARP

98 Gb Over IP Measurement (optional) Registers the data related to Gb over IP.IP provides an alternative to FrameRelay (FR) as a transport layer for theGb interface. The information iscollected from every Network ServiceVirtual Connection (NS-VC) identifiedwith NS-VC id and NSE (NetworkService Entity) id.

NS-VCI + NSEI

105 PS DTM Measurement (incl. signallingcharts) (optional)

Collects statistics on Dual TransferMode (DTM). Mainly collects network-initiated DTM call establishmentinformation and PS connection-relatedinformation of a DTM call.

BTS-level

1.3 Transmission measurements

Transmission measurements measure transmission and network quality.



The measurements collect data from counters in every workingtransmission equipment and exchange terminal (ET). The transmissionequipment increment some of the counters all the time and some onlywhen transmission errors happen. They register the availability of theconnection and the time during which there are errored bits in thetransferred data. They also register information on functional disturbances,frame errors, and slips. This information is used in downtime statistics.

The information is collected from the transmission equipment, which isdivided into suitable groups. The division is made based on the equipmenttype and generation. Table Transmission measurement and equipmenttypes describes this division.

Table 2. Transmission measurement and equipment types

Measurement type Equipment type Equipment generation

DMR DMR TMS4

DN2 DN2 TMS4

TRU/BIE TRU, BIE TMS4

Not supported TRE TMS4

TRE TRE, DMR Nokia Q1

TRE_SEL TRE, DMR Nokia Q1

In practice, the Nokia Q1 generation equipment comprise the NokiaMetroSite transmission equipment. Transmission EquipmentMeasurement (TRE) collects information from all the equipment in thenetwork, while Selective Transmission Equipment Measurement(TRE_SEL) collects information from a selected part of the network.

The connection between the BSC and the managed equipment isestablished either through a BSC-BTS O&M link or a Q1 service channel.The possible equipment types at a Base Transceiver Station (BTS) siteare: Base Station Interface Equipment (BIE), Transmission Unit (TRU),and Digital Microwave Radio Link (DMR). Other transmission equipmenttypes at the BTS site, such as optical line equipment, are handled in theBSC with the common name Transmission Equipment (TRE).

With the QWL command you can list the equipment type and generation ofall the equipment in the network. With the MML commands in the QUcommand group you can select and interrogate the equipment forSelective Transmission Equipment Measurement.




In general, a measurement collects data from all equipment defined in themeasurement type. Therefore, it is not possible to collect statistics fromspecific equipment of a measurement type. With Selective TransmissionEquipment Measurement you can only define the part of the MetroSitetransmission system you want to measure.


62 DMR Measurement Registers information on the signalquality and frequency input level of radiohopping, controlled by a DMR. Themeasurement collects information fromthe radio relay equipment.

PCM-level

63 DN2 Measurement Registers information on the signalquality of the PCM wire connected to aDN2. The measurement providesinformation on transmission quality inused PCM connection between a DN2and the BSC or another transmissionequipment.

PCM-level

64 TRU/BIE Measurement Registers information on the signalquality of the PCM wire connected to thetransmission unit (TRUA/TRUB) and/orthe base station interface equipment(BIE). The measurement providesinformation about transmission quality inused PCM connection between a TRU/BIE and the BSC or anothertransmission equipment.

PCM-level

65 ET BSC Measurement Provides information on the signal qualityof the PCM wire, which is connected tothe exchange terminal (ET) equipmentcontrolled by a BSC.

PCM-level

66 ET TCSM Measurement Provides information on the signal qualityof the PCM wire, which is connected tothe ET equipment controlled by a TCSM.

PCM-level

68 TRE Measurement Registers information on the signalquality of the MetroSite transmissionsystem.

PCM-level

69 Selective TRE Measurement Registers information on the signalquality and frequency input level (onlyfrom radio relay equipment) of theselected part of the MetroSitetransmission system.

PCM-level



1.4 Observations

Observations are useful in the BSC status monitoring as they give exact,almost real time information on the network's performance: its trafficsituation, handover success, and handover problems. With the aid of theobservations, you can examine, for example, abnormal function or trafficpattern of calls on a specific cell or channel, why several calls have endedprematurely without any obvious reason, or why it is not possible toestablish calls from some location area. This information is useful insystem maintenance and system testing.

Basically, all observations have the same function: they generate recordson specific occasions. However, they have a different observation recordformat, and they differ in the triggering conditions for generating anobservation record. For example, activity on the chosen channel createschannel observation records, handovers occurring in the observing cellcreate handover records, and a clear code observed during a call in theobserved cell creates clear code observation records.

The observation records are stored on disk files either when theobservation buffer is full or at user-defined intervals. The disk files are thentransferred to Nokia NetAct for post-processing.

You can activate the appropriate observation to a desired object anddefine a schedule for that observation. When needed, you can also startthe observations immediately without a schedule.

No Observation/optionality Purpose/function

16 SDCCH Observation Provides information on activity on the SDCCH. Anobservation report is generated every time theSDCCH is released.

17 TCH Observation Provides information on the use of the TCH. Anobservation report is generated every time the TCHis released.

18 Handover Observations (including internal,incoming and outgoing handover observations)

Provides information on handovers made in theBSC, from some other BSC to the observing BSC,and from the observing BSC to some other BSC. Anobservation report is generated every time such anHO occurs.

21 Radio Measurement Report Provides information on handovers made during thecall as well as levels and qualities of the uplink anddownlink signals and the signal levels received by 6adjacent cells.




No Observation/optionality Purpose/function

22 Clear Code Observation Provides information on dropped calls or handoverproblems. There are two possible ways to use thisobservation: to observe all failure clear codes underone BTS or one failure code under the whole BSC.An observation report is generated every time aspecific clear code occurs, or a clear code occurs inthe observed BTS.

24 Dropped Call Observation (optional) Provides information on dropped calls. Anobservation report is generated every time a call isdropped.

25 TBF Observation for GPRS Trace Collects information on allocations, reallocations,and releases of Temporary Block Flows (TBF) aswell as changes in the used coding scheme and MSflow control.

27 GPRS Cell Reselection Report Trace report for GPRS trace that containsinformation about NCCR triggering, NACC usage,and possible failures.

28 GPRS RX Level and Quality Report Report type needed to record the serving andneighbour cell measurements and quality data.

29 Drop Call Breakdown Observation (optional) Dissolves the updates of the counters 057044/001202 DROP AFTER TCH ASSIGN and 002071CLEAR REQUEST SENT BY BSC ON TCH to getmore accurate data on dropped calls.

30 Position Based Services Observation (optional) Collects detailed information on the positioningcalculation procedure in the BSC. The observationreport is collected for each location procedure of theME located in the target cell for the observation.

Related topics

. BSC Statistics Administration

. BSC Measurement Counters Displaying Program (FOXMEA)

. PCU2 Service Terminal Commands



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