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3GPP 2009 Mobile World Congress, Barcelona, 19th February 2009
3GPP 2009 1
Andrew HowellTSG GERAN Chairman
Update on the Evolution of theUpdate on the Evolution of theGERAN Family of StandardsGERAN Family of Standards
(GSM, GPRS, EDGE)(GSM, GPRS, EDGE)
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3GPP 2009 2
Contents
OverviewofTSGGERAN
Release7Overview
Release8Overview
Release9Outlineofongoingwork
Release10Outlineofongoingwork
Conclusion
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3GPP 2009 3
OverviewofTSGGERAN(1/3)
ObjectivesandOrganisation
TSGGERANObjectives:
GERAN=GSM/EDGERadioAccessNetwork Responsibleforthespecificationoftheradioaspectsof
theGSM/EDGEtechnologiesandtheirevolutions.
TSGGERANOrganisation: Threesubgroups:
WorkingGroup1:RadioAspects(andBTStesting);
WorkingGroup2:ProtocolAspects;
WorkingGroup3:TerminalTesting.
Around120 130delegatespermeeting.
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OverviewofTSGGERAN(2/3)
LeadershipofTSGGERAN
TSGGERANofficialsare:
Chairman: MrAndrewHowell
ResearchinMotionUKLtd/ETSI
Vicechairs: DrJongsooChoi SamsungElectronicsCoLtd/TTA
MrZhixiWang
HuaweiTechnologiesCoLtd/ATIS
MrLeoPatanapongpibul
VodafoneGroupPlc/ETSI
MCCsupport:PaoloUsai(MCC)
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OverviewofTSGGERAN(3/3)
LeadershipofTSGGERANWGs
TheleadershipoftheTSGGERANWGsis:
TSGGERANWG1: Chairman:MrWernerKreuzer
(ResearchinMotionUKLtd/ETSI)
MCCsupport:PaoloUsai(MCC)
TSGGERANWG2: Chairman:MrGuillaumeSbire
(NokiaCorporation/ETSI)
MCCsupport:GertThomasen(MCC)
TSGGERANWG3: Chairman:MrStoyanBaev
(SamsungElectronicsCoLtd/TTA)
MCCsupport:IngbertSigovich(MCC)
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Release7Overview(1/3)
Inclusionoflower700MHzintotheGERANspecifications(GSM710) uplink:728746MHz;downlink698716MHz
Additionofnew
frequency
band
toGSM
(TGSM810): uplink806821MHz;downlink:851866MHz
AdvancedGlobalNavigationSatelliteSystem(AGNSS): introducesAssistedGalileoinadditiontoAssistedGPS.
genericsolutionprovidedtoallowforintroductionofothersatelliteconstellationsinthefuture.
AssistedGPS(AGPS)minimumperformance: specifiesaminimumperformancefortheGPSreceiverembeddedin mobile
stationsusingAGPSoverGERAN.
EnhancementsofVoiceGroupCallService(VGCS)forpublicsecurityofficials(e.g.,police,firebrigade,using"public"GSMnetworks): endtoendciphering;
SMSoverVGCS;
emergencyhandling.
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Release7Overview(2/3)
AinterfacecontrolplanesignallingoverIP: AinterfacesignallingoverM3UA/SCTP/IP.
DualTransferMode(DTM)handover: allowssimultaneoushandoverofCSandPSresourcesforagivenenduser.
PSHandoverbetweenGERAN/UTRANmodeandGenericAccessNetwork(GAN)mode:
complementstheRel6GANwithPShandoversbetweentheunlicensedradiolinkandGSM/UMTSforimprovedservicecontinuity(e.g.,whenleavinghome).
MSReceiveDiversity(a.k.a.DARPPhaseII): improveddownlinkperformance(qualityandspectralefficiency)viauseofdualantennaterminals.
DownlinkDualCarrier: supportofsimultaneoustransmissionstoagivenuserovertwoindependentGSMcarriersonthe
downlink,enablingtodoublethedownlinkthroughputforthisuser.
LatencyReductions: reducesterminaltonetworkroundtriptimethroughtheuseoftwotechniques:
factack/nackreporting;
reducedTransmissionTimeInterval(RTTI=10msinsteadof20ms).
pavesthewayforsupportofVoIPoverGERAN
bettersupportofdelaysensitive"conversational"typeofapplications
improvesthroughputofTCPbasedapplicationsduetothereductionoftheroundtriptime.
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Release7Overview(3/3)
EGPRS2UL: additionofQPSK,16QAM,32QAMandhighersymbolrateinuplink
comesintwoflavours:
versionA(EGPRS2AUL):GMSK,8PSK,16QAM,legacysymbolrate271
ksymbols/s;
versionB(EGPRS2BUL):GMSK,QPSK,16QAMand32QAM,highersymbolrate
325ksymbols/s.
EGPRS2DL: introductionofQPSK,16QAM,32QAM,highersymbolrateandturbocodingin
downlink
comesintwoflavours:
versionA(EGPRS2ADL):GMSK,8PSK,16QAM,32QAM,turbocodes,legacy
symbolrate271ksymbols/s;
versionB(EGPRS2BDL):GMSK,QPSK,16QAM,32QAM,turbocodes,higher
symbolrate325ksymbols/s.
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Release8Overview(1/3)
GERANLTEinterworking:
definescellreselectionandCS/PShandoverbetweenGERANandLTE.
MulticarrierBTS:
throughtherelaxationofcertainGSMBTSradiorequirements,allowsto
conveyseveralGSMcarrierswithasinglewidebandtransceiver,inorderto
bringcapexandopexsavingstotheoperators.
FeasibilitystudyonMUROS(MultiUserReusingOneSlot):
aimistodoublevoicecapacityofGERANperBTStransceiverbysharinga
singletimeslotbetweenupto4users;
Feasibility
study
on
Optimized
Transmit
Pulse
Shape
for
downlinkEGPRS2B:
analysisofawiderBTStransmitmasktofurtherincreasethroughputsof
EGPRS2Bdownlinkwhilstcheckingpotentialimpactonlegacybearersusing
legacyterminals.
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Release8Overview(2/3)
AinterfaceoverIP: supportofAoverIP(aftersupportofGboverIPinRel4);
allowstomovethetranscodersfromtheBSStotheCoreNetwork(MGWs),allowingcapexandopexsavingsfortheoperators.
GANenhancements(GANIumode): allowstoconnecttheGANCto3GCoreNetworksviatheIuinterface.
EnhancementsforVGCSApplications:
allowstosend/receiveasmallamountofdatato/fromgroupmembers; allowstotransfercriticaldatawithin500mswithoutimpacting voicequality
ofthegroupcall;
gathersinformationontheidentityofcurrentlistenersinthegroupcall.
UTDOAenhancements: allowstheMStobepoweredatmaximumpowerduringthe(brief)locationprocedure,inordertoimprovelocationaccuracy.
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Release8Overview(3/3)
AGNSSperformanceandtestingprocedures:
SpecifiesaminimumperformancefortheGalileoreceiverembeddedinmobilestationsusingAGNSSoverGERANanddefinesatestframeworkforterminalsthatcouldbeextendedtothesupportofotherconstellations.
AdditionalNavigationSatelliteSystems(ANSS)forLCS:
ComplementstheGPSandGalileoconstellationswithother
constellationssuchas: GLONASS:
:
ModernizedGPS
QuasiZenithSatelliteSystem(QZSS) SatelliteBasedAugmentationSystems
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Release9Outlineofongoingwork(1/3)
AGNSSminimumperformances
Clarificationsrelatingtosatelliteconstellationandassistancedata.
RFRequirementsforMulticarrierandMultiRATBS,GERANpart LookingatalignmentofblockingrequirementsinmultiRAToperationandinGSM
singleRAToperationforMSRequipment.
ReviewofGERANrelatedchangestoTS37.104,TS37.113,TS37.141,andTR37.900.
VoiceservicesoverAdaptiveMultiuserchannelsonOneSlot(VAMOS) ShiftedSACCHagreedforVAMOSIImobilestations.
FirstsetofperformancerequirementsforVAMOSIMSpresented
Openissues
DecisiononsignallingofVAMOScapabilityinuplinkandVAMOSmodeindownlink
Specificationofmaximumsubchannelpowerimbalanceratio(SCPIR)valuefordownlink
Decisiononoptimisedpulseshapeindownlink.
SpecificationofTXandRXperformancerequirementsindownlinkforVAMOSIandVAMOSII
mobilesandforBSSinuplink.
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Release9Outlineofongoingwork(2/3)
HomeNBandHomeeNBenhancements
CSGreporting:Agreedworkingassumptions ThereportedCSGcellisthestrongestcellonafrequency.
ThethresholdsforCSGreportingaredifferentfromtheonesfor macro
cell.
Ec/N0plusRSCP,RSCP,RSRQplusRSRP,andRSRQplusRSRPareusedtosetthresholdsforCSGreportingforUTRANFDD,UTRANTDD,EUTRAN
FDD,andEUTRANTDDrespectively.
HandovertoCSGcells Changeshavebeenidentifiedandtechnicallyendorsedbutwillbe
resubmittedforapprovalonceafullsetofchangesisavailable forH(e)NB
Enhancements
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Release9Outlineofongoingwork(3/3)
BSCCBCInterface
SupervisionoftheBSC/CBCinterfaceisnowcompletewiththedefinitionofa
KeepAliveprocedurein3GPPTS48.049 Ongoingimprovementsalsobeinglookedat
GeneralTechnicalEnhancementsandImprovements
PowerlevelforRACH ClarificationofDTMsupportforEFTAandinterpretationofmultislotclass
parametersforEFTA
Reviewoncellreselectionenhancements.
SelfOptimisingNetworks(SON)
MixofRTTI+BTTIforagivenTBF(MTTI)
EnhancedFlexibleTimeslotAllocation(EFTA)
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Release10outlineofongoingwork
(1/2)Somegeneralobservations:
AsignificantpartoftheworkofTSGGERANistomaintaincompatibilityoftheGSMbasedsystemswiththeother
systemsbeingevolvedby3GPPandthisworkcontinues
withintheRelease10setofspecifications.
Fortheforeseeablefuture,especiallygiventhe
widespreaddeploymentofGSMbasedsystems,itis
expectedthatGERANwillneedtocontinuetoadaptto
ensurecompatibilityofexistingequipmentwiththe
evolvingnetworks
GSMbasedsystemscontinuetoprovideanexcellentlow
costplatformformanydevelopingservices
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Release10outlineofongoingwork
(2/2)InadditiontotheongoingworkofkeepingGERAN
basedsystemscompatiblewithothersystems(i.e.UMTS,LTE)otherareasofworkwithinRelease10
include:
LocalCallLocalSwitch GERANImprovementsforMachinetypeCommunications
TechnicalEnhancementsandImprovements,suchas:
DynamicTimeslotReductiona.k.a.DTR
OptimizedDRXmode
EnhancedMultiplexingforsingleRLCentitya.k.a.EMSR
PrecodedEGPRS
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Conclusions
TheGSMradiointerfacehasevolvedoverthepastfewyears
andwillcontinuetoevolveinthefuturetobringadditional
featuresandimprovementsattractivetobothoperatorsand
subscribers.
Evolutionisprimarilyfocusedaroundthefollowingareas:
Interworkingwithotheraccesstechnologies(e.g.LTE);
Increasingthroughputs;
Increasingcapacities(improvedspectralefficiencyandhardwareefficiency);
Supportforadditionalfrequencybands; Supportof(additional)locationtechniques;
SupportofIPbasedinterfaces.
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Conclusions(cont)
TheongoingworkwithinTSGGERANcontinuesto
increasethesuitabilityofGSM/GERAN: forstandalonenetworks;
fornetworksusedinconjunctionwithotherradioaccess
technologies(UMTS,LTE...)toprovideglobalcoveragewhilstallowingexcellentservicecontinuity;
asafutureproofplatformprovidingasmoothmigration
pathtowardsother3GPPbasedsystems(UMTS,LTE).GSMisanaliveandevolvingtechnologywhichwill
continuetoprovidefortheneedsofoperatorsfor
manyyearstocome18
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