112BSSPARRadioNetworkPerformance v2.docx
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112BSSPARRadioNetworkPerformance v2.docx
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112BSSPARRadioNetworkPerformancev2
BSSPAR
RadioNetworkPerformanceFeatures
TrainingDocument
Theinformationinthisdocumentissubjecttochangewithoutnoticeanddescribesonlytheproductdefinedintheintroductionofthisdocumentation.ThisdocumentisintendedfortheuseofNokiaNetworks'customersonlyforthepurposesoftheagreementunderwhichthedocumentissubmitted,andnopartofitmaybereproducedortransmittedinanyformormeanswithoutthepriorwrittenpermissionofNokiaNetworks.Thedocumenthasbeenpreparedtobeusedbyprofessionalandproperlytrainedpersonnel,andthecustomerassumesfullresponsibilitywhenusingit.NokiaNetworkswelcomescustomercommentsaspartoftheprocessofcontinuousdevelopmentandimprovementofthedocumentation.
Theinformationorstatementsgiveninthisdocumentconcerningthesuitability,capacity,orperformanceofthementionedhardwareorsoftwareproductscannotbeconsideredbindingbutshallbedefinedintheagreementmadebetweenNokiaNetworksandthecustomer.However,NokiaNetworkshasmadeallreasonableeffortstoensurethattheinstructionscontainedinthedocumentareadequateandfreeofmaterialerrorsandomissions.NokiaNetworkswill,ifnecessary,explainissueswhichmaynotbecoveredbythedocument.
NokiaNetworks'liabilityforanyerrorsinthedocumentislimitedtothedocumentarycorrectionoferrors.NokiaNetworksWILLNOTBERESPONSIBLEINANYEVENTFORERRORSINTHISDOCUMENTORFORANYDAMAGES,INCIDENTALORCONSEQUENTIAL(INCLUDINGMONETARYLOSSES),thatmightarisefromtheuseofthisdocumentortheinformationinit.
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NOKIAlogoisaregisteredtrademarkofNokiaCorporation.
Otherproductnamesmentionedinthisdocumentmaybetrademarksoftheirrespectivecompanies,andtheyarementionedforidentificationpurposesonly.
Copyright©NokiaOy2003.Allrightsreserved.
Contents
1ModuleObjectives4
2BSCStatistics5
2.1BSCstatisticsadministration-relatedmeasurements6
2.2BSCstatisticsadministration-relatedobservations9
2.3RunningaBSCstatisticsadministration-relatedmeasurementorobservation10
2.3.1CreatingaBSCstatisticsadministration-relatedmeasurement11
2.3.2CreatingaBSCstatisticsadministration-relatedobservation16
2.3.3StartingaBSCstatisticsadministration-relatedmeasurementorobservation19
3C/IRatioStatistics20
3.1ActivatingC/IRatioStatistics21
4TraceWindowforDroppedCalls23
4.1ActivatingTraceWindowforDroppedCalls25
5StatisticalSupportForAutomatedPlanning27
5.1ActivatingDACMeasurement31
5.1.1ActivatingDACMeasurement32
6SynchronizedBSS33
7GSM-WCDMAInter-SystemHandover36
7.1WCDMARANcellmeasurements37
7.2Cellre-selectionfromGSM/GPRStoWCDMARAN44
7.2.1Mobilecontrolledcellre-selectionwithnon-GPRScapablemobiles47
7.2.2Mobilecontrolledcellre-selectionwithGPRScapablemobiles48
7.3HandoverfromGSMtoWCDMARANindedicatedstate51
8KeyLearningPoints56
9ReviewQuestions63
10Appendix-A:
BSCMeasurements66
1ModuleObjectives
Attheendofthemodule,theparticipantwillbeableto:
∙OutlinethecollectionanduseofBSCstatistics
∙StatethepurposeofC/IStatisticsmeasurements
∙Describe“TraceWindowsforDroppedCallObservation”
∙Explainthefeature,statisticalsupportforautomatedplanning
∙StatetheneedforthesynchronisedBSSfeature
∙DiscussthemechanismsforGSM-WCDMAinterworking
BSCStatistics
Torunthenetworkeffectively,thatis,tominimisecostsandmaximiseservicequalityforthesubscriber,youneedtoknow
∙howtheBSCperforms
∙whattheBSCservicelevelis
∙howtheradionetworkperforms
∙whattheradionetworkservicelevelis
∙whatthetransmissionqualityis.
Inpracticeyouneedtoknow,forexample,howtrafficiscarriedbydifferentcells,whetherthereiscongestiononstand-alonededicatedcontrolchannels(SDCCH)ortrafficchannels(TCH),andhowmanysuccessfulandfailedhandoversthereare.TheBSCstatisticsoffersapowerfulmeanstosupervisetheradionetworkandgettheneededinformationwiththeaidofvariousmeasurementsandobservations.
Byanalyzingtheinformation,youcanfindoutifthereare,forexample,loaddistributionproblems,thatis,bothheavilyloadedandlightlyloadedpartsinthesystem.Youcanalsodetectifthereis,forexample,exceptionallyhighpercentageoflossofspeechordatainsomepartofthenetwork.Withsuchinformation,youcanre-dimensionthesysteminordertobalancethenetworkandimproveperformance.Observingcertaintrafficcharacteristicsoveralongerperiodenablesyoutoforecastwhennewresourcesorextensionsmustbeintroducedintothenetwork.
TheBSCstatisticsadministrationhelpsyoutogettheinformationyouneedonthevariouscharacteristicsoftheBSC,radionetworkandtransmission.Togettheinformation,youneedtohavedifferentmeasurementsandobservationsrunninginthenetwork.
Becauseofthevarietyofmeasurementsandobservations,differentmeasurementresultsareusedfordifferentpurposes.Somemeasurementscollectstatisticalinformation,whichisusefulinnetworkplanning,someareusedformonitoringerrorsituations.
Operation
TheBSCmeasurementsystemcollectsbasicinformationontrafficintensityanddistributionintheBSC,andsignalquality.Theinformationiscollectedduringdifferenttimesofthedayandweekaccordingtomeasurementschedules.
Usually,youdefineameasurementorobservationandascheduleforit,startitandpost-processthedataitcollects.Sometimes,however,youmayhavetomodifyameasurementorobservation.Youmayalsohavetorunanextrameasurementdatacollectionforaclearcodemeasurement.
InordertooperatetheBSCstatisticsadministrationyouneedtohaveboththemeanstooperateit,andtoknowthefield.
Allmeasurementsandobservationsareindependentofeachother,butthesameuserinterfaceisusedforhandlingthemall.
TheMMLcommandsassociatedwiththeBSCstatisticsadministrationareincludedinthecommandclassTrafficAdministration(T)andO&MNetworkAdministration(Q).(ZTPx,andZQUxcommands).
Ingeneral,therearenoprerequisitesfortheGSMnetworktorunmeasurementsandobservations.SomeofthemeasurementsandobservationsareOPTIONALandtheyhavetobeactivatedbeforeyoucanrunthem.
Prerequisites
Ingeneral,youdonotneedtoknowtheBSCstatisticsadministrationthoroughlytorunmeasurementsorobservations.However,tocreatethemostusefulwaytocollectinformationfromthenetwork,thatis,tocreatetheoptimalmeasurementdefinitionsandschedules,youdoneedtoknowtheareadeeply.Althoughyoudonotneedtoknowhowtopost-processthecountercollectiondata,thatknowledgehelpsyoutocreatethemostusefulmeasurementsandobservations.
Measurementdatafilehandling
BSCstatisticscollectsmeasurementdatafromtheBSC,radionetworkandtransmission.Thecollectedstatisticalcounterdataisstoredinameasurementresultfile.ThefileisusedfortransferringthedatatotheNokianetworkserviceandmanagementsystem(NokiaNetAct)andforpost-processing.Aftereachdatacollectioniscompleted,theBSCautomaticallyinformsNokiaNetAct.NokiaNetActthenfetchesthecollecteddatatoitsdatabase.Withonlineobservation,theinformationissentdirectlytoNokiaNetActbyusingtheQ3interfaceevents.
Youcannotpost-processthemeasurementdatayougetintheBSC.ForthatpurposeitisrecommendedtouseNokiaNetActwhichhastoolsfordatapost-processing.
BSCstatisticsadministration-relatedmeasurements
Ingeneral,themeasurementsconsistofseveralcountersthatmeasurevariousmatters.Duetotheextensivenumberofthecounters,moredetailedinformationoncountersandonmeasurements,whichhaveareferencegroupfeatureisnotpresentedhere,butcanbefoundinBSCCounters.Thereareseveralmeasurements,whicharedividedintotwogroups;similargroupingisusedinthemeasurementhandlingMMLcommands.
Themeasurementsaredividedintotwogroupsaccordingtotheirfunction:
∙callcontrolmeasurements
∙transmissionmeasurements
∙observations
Thecallcontrolmeasurementsmeasurevariouscall-relatedissueswhilethetransmissionmeasurementsmeasurethequalityofthetransmissionnetwork.
Allthemeasurementsareindependentofeachother,thusyoucanrunthemeasurementsyoufeelarenecessary.However,someofthemeasurementsareconnectedtoeachother,sothatyouwillgetthemostusefulinformationwhenyouhavethemrunningatthesametime.
Callcontrolmeasurements
Thecallcontrolmeasurementsmeasurecall-relatedissues,suchascongestiononaspecificchannelorarea.ThecallcontrolmeasurementsaredescribedinnumericalorderintheAppendixA.Therelevantnumbersare1-8,13-15,50-61,67,70-79and89-94.
Transmissionmeasurements
Transmissionmeasurementsmeasuretransmissionandnetworkquality.Themeasurementscollectdatafromcountersineveryworkingtransmissionequipmentandexchangeterminal(ET).Transmissionequipmentincrementsomeofthecountersallthetimeandsomeonlywhentransmissionerrorshappen.Theyregistertheavailabilityoftheconnectionandthetime,duringwhichthereareerrorbitsinthetransferreddata.Theyalsoregisterinformationonfunctionaldisturbances,frameerrorsandslips.Thisinformationisusedindowntimestatistics.
Theinformationiscollectedfromthetransmissionequipment,whichisdividedintosuitablegroups.Thedivisionismadebasedontheequipmenttypeandgeneration.Thefollowingtabledescribesthi
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