Foreword

ThisspecificationisformulatedaccordingtotherequirementsofDocumentGongXinTingTong〔2011〕No.66issuedbyMinistryofIndustryandInformationTechnology(MIIT)A"NoticeontheDevelopmentPlanofTelecommunicationsEngineeringandConstructionStandardsin2011".

ThisspecificationincludesgeneralrequirementsfornetworkdesignofdigitalcellularmobilecommunicationsnetworkWCDMA,corenetworkdesignofCSdomain,corenetworkdesignofPSdomain,radioaccessnetworkdesign,trunklines,signallingandinterfacedesignrequirements,numberingformat,billingandnetworkmanagement,synchronizationrequirements,bureauandstationlocationselection,equipmentinstallationprocess,greenenergysavings,co-constructionandsharing,etc..

TheCommunicationsDevelopmentDepartmentofMinistryofIndustryandInformationTechnologyisresponsiblefortheexplanationofthisspecificationandoverseesitsimplementation.Allrelevantorganizationsarekindlyrequestedtogivecommentsandsuggestionsonsupplementingormodifyingthespecificationduringitsimplementationprocess.Therelevantcommentsandsuggestions,whenevernecessary,canbepostedorpassedontotheCommunicationsDevelopmentDepartmentofMinistryofIndustryandInformationTechnology(Address:13WestChang'anAvenue,Beijing,Postcode100804).

PreviousChiefDevelopmentOrganization:ChinaMobileGroupDesignInstituteCo.,Ltd.

ChiefRevisionOrganization:

ChinaInformationTechnologyDesigningandConsultingInstituteCo.,Ltd.

ChiefDraftingStaff:

GengYuboMengLiHeXiaofengChenWeiweiLuHongbo

ParticipatingRevisionOrganizations:

LiaoningPostandTelecommunicationsPlanningandDesignInstituteCo.,Ltd.

BeijingTelecomPlanningDesignInstituteCo.,Ltd.

JiangsuPostandTelecommunicationsPlanningandDesignInstituteCo.,Ltd.

ChiefDraftingStaff:

LiSuzhiShiYulingChangHeGaoJinlongLinChaohuiWangJia

XieQiangCaoMinkeJiZhihong

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Contents

1GeneralProvisions (1)

2TermsandSymbols (2)

3NetworkDesignRequirements (4)

4Circuit-switchedCoreNetworkDesign (6)

4.1CSDomainNetworkArchitecture (6)

4.2CSDomainNodes (6)

4.3CSDomainNetworkOrganization (8)

4.4SS7Network (8)

4.5InterconecivitywithOtherNetworks (9)

5Packet-switchedCoreNetworkDesign (10)

5.1Packet-switchNetworkArchitecture (10)

5.2Packet-switchNetworkNodes (10)

5.3Packet-switchNetworkOrganization (11)

6RadioAccessNetworkDesign (13)

6.1GeneralPrinciples (13)

6.2RadioAcessNetworkQosIndexes (13)

6.3DesignofRadioAccessNetworkCoverage (13)

6.4DesignofRadioAccessNetworkCapacity (15)

6.5AntenaandFeedecEngmerngDesign (15)

6.6CoverageParitonDesignforRNC,LACandRAC (16)

6.7RadioAccessNetworkDesignwithHSPAandHSPA+ (16)

6.8FreoueneAIlocgtionandScramblingCodePlaning (17)

6.9Inter-systemInterferenceCoordination (17)

7TrunkInterfaceandSignalingMode (19)

7.1CSDomainTrunkInterfaceRequirements (19)

7.2RequirementsforPSTrunkInterface (19)

7.3RequirementsforRadioAccessNetworkInterfaces (19)

7.4SignalingMode (19)

8Trunk,SignalingandIPBandwidthCalculation (21)

8.1ServiceModel (21)

8.2TDMTrunkCalculation (22)

8.3IPBandwidthCalculation (22)

9NumberingandIPAddress (23)

9.1CSDomainNumbering (23)

9.2PSDomainNumbering (24)

9.3IPAddressAllocation (25)

10Billing,NetworkManagementandNetworkSecurity (26)

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10.1CSDomainBilingRequirements (26)

10.2PSDomainBillingRequirements (26)

10.3NetworkManagementRequirements (26)

10.4NetworkSecurity (26)

11SynchronizationRequirements (28)

11.1ClockSynchronization (28)

11.2TimeSynchronization (28)

12BureauandStationLocationSelection (29)

12.1CNBureauLocationSelection (29)

12.2RadioAcessNetworkStationSelecion (29)

13RequirementsforEquipmentInstallation (31)

13.1CNEquipmentRoomRequirements (31)

13.2EquipmentRoomReqirementsforWielesBaseStarion (31)

13.3AntennaandFeederInstallationRequirements (32)

13.4DesignRequirementsforMast(Pole)andSteelTower (33)

14GreenEnergySaving,EnvironmentalProtectionandResourcesSharing (35)

14.1DesignRequirementsforGreenEnergySaving (35)

14.2EnvironmentProtection (35)

14.3Co-locationandSharnofTelecommieaonfastructure (35)

AppendixAExplanationofWordinginThisSpecification (36)

QuotedStandardList (37)

ExplanationofProvisions (39)

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1GeneralProvisions

1.0.1ThisspecificationisapplicabletothedesignofWCDMAdigitalcellularmobilecomm-unicationssystemandservesasareferencespecificationtothedesignofothermobilecommunicationsnetworks.Thenetworkorganizationandallocatedfrequencybandsshouldbeimplementedinaccordancewithrelevantregulations.

1.0.2Contentsoftelecommunicationsinfrastructurerelatedtonationalsecurityshallbeimplementedincompliancewithrelevantnationalregulations.

1.0.3Engineeringdesignmustbecarriedoutbasedonnationalpoliciesoninfrastructureconstructionandtechnicaleconomy,andshallbecompliedwithrelevantnationaltechnologicalsystemsandstandardswithdueconsiderationgiventoChina'scommunicationsdevelopmentsituationandrationalutilizationoffrequencyspectrumresources.

1.0.4CharacteristicsofHSPAtechnologyandnetworkingareincorporatedintotheradioaccessnetworkinthepreparationofthisspecification,excludingthedetaileddesignofserviceplatform.Modificationsandamendmentswillbemadefothisspecificationalongwithtechnologydevelopmentandnetworkevolution.

1.0.5Duringtheengineeringdesignprocess,itshallbeundertakentoreasonablyallocatenetworkresourcesandmeetthedemandsofanincreasingnumberofsubscribersandservicedevelopment,whichneedcomprehensivesurveyandforecastofsubscriberdemandsandoperationmaintenance,carefulconsiderationofcorrectionsandoptimizationofmobiledataservicemodelonthenetworkarchitecture,capacityandQoS.

1.0.6Engineeringdesignerlshallconsidernationalpoliciesandregulationsonenergysaving,emissionreduction,landuse,energyandrawmaterialconsumption,ehvironmentalprotectionandlandscapereservation.Existinginfrastructureshallbefullyusedandshared.

1.0.7Telecommunicationequipmentintheengineeringdesignshallbeissued"NetworkAccessLicen-seforTelecommunicationEquipment"bytheMinistryofIndustryandInformationTechnology.

1.0.8BeinaccordancewiththeSeismicfortificationrequirementsintheconstructionoftelecom-municationnetwork,whichwouldbedeployedinareaswhereseismicfortificationintensityis7degreesorabove,TelecommunicationEquipmentShallmeettherequirementsofSpecificationforSeismicTestofTelecommunicationsEquipmentYD5083.

1.0.9Incaseofanyconflictsbetweenthisspecificationandrelatednationalstandards/specifications,thelattershallprevail.

1.0.10Whenitwouldbedifficulttoimplementcertainprovisionsofthisspecificationinspecialcircumstances,afullaccountofthereasonsandalternativesolutionsshallbesubmittedtothecompetentauthoritiesforapproval.

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2TermsandSymbols

Abbreviation

APN

AUC

BG

BLER

BITS

CAP

CG

CI

CMN

CN

CS

DNS

DPC

GCI

GGSN

GMSC

GMSCServer

GMGW

GT

HLR

HON

HSPA

HSDPA

HSUPA

HSTP

IMSI

INAP

LAC

LAI

LSTP

MCC

MGW

MNC

MSC

MSCServer

FullName

AccessPointName

AuthenticationCenterBorderGateway

BlockErrorRate

BuildingIntegratedTiming(Supply)SystemCAMELApplicationPart

ChargingGatewayCellIdentity

CallMediationNode

CoreNetwork

CircuitSwitching

DomainNameServerDestinationPointCodeGlobalCellIdentity

CatewayGRPSSupportNode

GatewayMobileSwitchingCenter

GatewayMobileSwitchingCenterServer

GatewayMediaGate-WayGlobalTitle

HomeLocationRegisterHandoverNumber

HighSpeedPacketAccess

HighSpeedDownlinkPacketAccess

HighSpeedUplinkPacketAccess

HighSignalingTransferPoint

InternationalMobileSubscriberIdentityIntelligentNetworkApplicationPart

LocationAreaCode

LocationAreaIdentity

LowSignalingTransferPointMobileCountryCode

MediaGate-way

MobileNetworkCodeMobileSwitchCenter

MobileSwitchCenterServer

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MSIN

MSISDN

MSRN

MTP

P-TMSI

PDN

PS

RAC

RAI

RNC

SCCP

SGSN

SMSC

STP

TMSC

TMSCServer

TMSI

UARFCN

UE

USIM

UTRA

UTRAN

VLR

MobileSubscriberIdentificationNumberMobileSubscriberISDNNumber

MobileStationRoamingNumberMessageTransferPart

Packet-temporaryMobileSubscriberIdentity

PacketDataNetworkPacketSwitching

RoutingAreaCode

RoutingAreaIdentity

RadioNetworkController

SignalingConnectionControlPartServingGPRSSupportNode

ShortMessageServiceCenterSignalingTransferPoint

TandemMSC

TandemMSCServer

TemporaryMobileSubscriberIdentity

UTRAAbsoluteRadioFrequencyChannelNumberUserEquipment

UniversalSubsciberIdentityModule

UniversalTelecommunicationRadioAccessUMTSTerrestrialRadioAccessNetwork

VisitLocationRegister

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3NetworkDesignRequirements

3.0.1WCDMAsystemarchitectureconsistsofUE,UTRANandCN.Figure3.0.4showsgeneralsystemarchitecture.

Gi

GGSNBG

Gc

CMN

GnGp

CSDomain

MSCServer/VLR/SSP

Gn

SGSN

NbMc

MGW

Gb

CN

Iu-cSIu-ps

RNCIur一RNC

GRAN

NodeBNodeB

RAN

Um

2GUE

UE

HLR/AuC

D/CGa

lubUTRAN

GMSCServer/SSP

MSCServer/VLR/SSP

Uu

3GUE

GMGWMc-

CGGa

PSDomain

Dual-mode

Abis十

Um

MGW

SGSN

Nc/E

DNS

BSC

BTS

NcE

SCP

Uu

Figure3.0.1WCDMANetworkArchitecture

Legend:SolidLines-serviceinterface;DottedLines-signallinginterface

1Userequipmentincludesthemobileequipmentandsubscriberidentitymodule;

2UTRANconsistsofNodeBandRNC;

3CNarchitectureis3GPPR4version.Sharedby2Gand3Gnetworks,itincludesaCSdomainandaPSdomain.CSdomainequipmentconsistsofMSCServer,GMSCServer,MGW,SG,VLR,HLRandAuC,whilePSdomainequipmentconsistsofGPRSSGSN,GPRSGGSN,CG,BGandDNS.

3.0.2WCDMAsysteminterfaces:

1UTRANInterfaces:RadiointerfaceUubetweenUEandnetwork,IubinterfacebetweenNodeBandRNC,IurinterfacebetweenRNCs,IuinterfacebetweenRNCandCN(includingIu-CStoCScorenetworkandIu-PStoPScorenetwork);

2CScorenetworkInterfaces:Ncinterfacebetween(G)MSCServers,Mcinterfacebetween(G)MSCServerandMGW,NbinterfacebetweenMGWs,andotherMAPinterfacessimilartoGSM

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network;

3PScorenetworkInterfaces:GninterfacebetweenGSNs;GpinterfacebetweenGSNsofdifferentPLMNs;GiinterfacebetweenGGSNandPDN;GrinterfacebetweenSGSNandHLR;andGainterfacebetweenGSNandCG.

3.0.3WCDMAnetworkengineeringdesignrequirements:

1Complyingwithrelevantnationalandindustrytechnicalrequirementsandspecifications;

2Adoptingdifferentconstructionprinciplesaccordingtothecharacteristicsofvastlandspread,uneveneconomicdevelopmentandunevensubscriberandservicedistribution;

3Adaptivetotheneedsofcorporatedevelopment,servicedevelopment,networkdevelopmentstrategyandscopeoftelecomoperators,aswellassupportingasustainableprospect;

4Ensuringinteroperabilityandconnectionswithothernetworks;

5Ensuringthatthenetworksbuiltareeconomicallyrationalandstructurallyclear;

6Finalizingthedesignthroughacomparativestudyofmultipledesignproposals;

7Makingfulluseofexistingresources,adheringtotheprincipleofco-locationandsharingwithdiversifiedoperators,minimizingredundantconstruction,andreducingconstructionandoperatingcost.

3.0.4ThefollowingshallbeincludedinWCDMAnetworkdesign:

1CScorenetworkdesign;

2PScorenetworkdesign;

3Radioaccessnetworkdesign;

4Trunkinterfaceandsignalingmode;

5NumberingplanandIPaddressallocation;

6Billing,networkmanagementandnetworksecurity;

7Synchronizationmethods;

8Bureauandstationlocationselection;

9Installationandprocessrequirements;

10Co-locationandsharing,environmentalprotection,energy-savingandemissionreductionrequirements.

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4Circuit-switchedCoreNetworkDesign

4.1CSDomainNetworkArchitecture

4.1.1TheCScorenetworkofWCDMAsystemshouldbedividedintothreearchitecturallayersconsistingofmobileservicelocalnetwork,intra-provincialnetworkandnationalnetwork.

1MobileservicelocalnetworkhasbasicallythesamegeographicalscopeasthatofPSTN.

2Theintra-provincialnetworkconstitutesmultiplemobileservicelocalnetworkswithintheprovincialterritory,andtheinter-provincialnetworkiscomposedofmanifoldintra-provincialnetworks.

3Accordingtonetworkingneeds,theentirecountrymaybedividedintoseveraloperationtandemareas.Withineachoperationtandemareaoneprovincialcapitalmaybeselectedtoserveasthecentralcityoflargeregions.

4.1.2Internationalcommunicationsnetworkanddomestiecommunicationsnetworkareindependentofeachother.Theinter-communicationsareimplementedthroughtheinternationalinwardandoutwardexchangesystem.

4.2/CSDomainNodes

4.2.1CScorenetworknodesinaWCDMAnetworkshallinclude(G)MSCServer,VLR,(G)MGW,SG,GMSC,HLR,AuC,CMN,TMSCandTMSCSERVER.

4.2.2MSCServerandVLRdeploymentshallabidebythefollowingprinciples:

1MSCServersshouldbedeployedinacentralizedmanner.Multiplesmall-trafficlocalnetworksmayshareonesetofMSCServer.MSCServersshallbecentrallydeployedinhigh-trafficcitiesorprovincialcapitalswithstrongtechnicalandmaintenancecompetence,bettertransmissionresourcesandIPbearernetworkbackbonenodes.

2MSCServershallbedeployedwithVLR.MSCServershallhavethefunctionsofSSP.

3MSCServershouldbeprovidedwithasecuritybackupmechanism.High-capacitysingleMSCServershallbeequippedwithnecessarydisasterrecoverymeasures.

4ThecapacityconfigurationofMSCServershallsatisfythelocalandroamingsubscriberstrafficwithconsiderationofpracticalprocessingreservation.

52Gand3GunderthesameMSCServershouldcoverthesamearea.

4.2.3MGWdeploymentshallabidebythefollowingprinciples:

1MGWsshouldbedistributedatrequiredlocalnetworksbasedontraffic.DuringtheinitialstageofWCDMAnetworkconstruction,severallocalnetworksmayshareoneMGWwhosequantityistobeincreasedaccordingtofuturetrafficgrowth.

2MGWshallbedeployedatabureaulocationwithrichtransmissionandIPbearernetworkresources.

3MGWshallbedeployedatthesamebureaulocationasthatofRNC.

4.2.4SGdeploymentshallabidebythefollowingprinciples:

1SGshouldbeintegratedintoMSCServerorMGW.

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2WhenindependentdeploymentofSGsisnecessary,theyshallbeconfiguredinpairs.

4.2.5GMSC(orGMSCServer+GMGW)deploymentshallabidebythefollowingprinciples:

1Fortelecomoperatorswithgatewayexchangeinstalledinexistingnetworks,GMSCmaysharethesameexchange,or,newgatewayexchangeshouldbeconstructedwithsoftswitchequipment.

2GMSCServersshouldbedeployedwithlocalnetwork.Multiplesmall-trafficlocalnetworksmayshareonesetofGMSCServer.Thedeploymentshallbeplacedinprovincialcapitalorhigh-trafficcitywithstrongtechnicalandmaintenancecompetence,bettertransmissionresourcesandIPbearernetworkbackbonenodes.

3GMSC(GMSCServer)shouldbedeployedinpairs,andallGMSCsshallhavethefunctionsofSSP.

4GMGWshouldbedeployedwithlocalnetworkasunit,andshallbeatabureaulocationwheretherearegoodconditionsforinter-transmissionwithothertelecomoperators.

4.2.6HLRdeploymentshallabidebythefollowingprinciples:

1HLRshallbecombinedwithAUC,andlarge-capacityequipmentshouldbeadopted;

2OneormultipleHLRsmaybedeployedforonelocalnetworkaccordingtothenumberofsubscribers,ormultiplesmall-trafficlocalnetworksmayshareoneHLR;

3AreasonabledisasterbackupmechanismshallbeconsideredforHLR.

4.2.7CMNdeploymentshallabidebythefollowingprinciples:

1Whensoftswitchcorenetworkhasalargerscope,CMNnodesshallbeinstalledonthenetworktotransferBICCsignalingmessagesbetweendifferent(G)MSCServers;

2Duringtheinitialstageofnetworkconstruction,CMNequipmentmaybedeployedbylargearea,andshouldbedeployedbyprovinceasCMNquantityincreasesinthegrowthoftraffic;

3CMNshallbedeployedatabureaulocationwithrichtransmissionandIPbearernetworkresources,supportedbysufficientconsiderationofsystemsecurityandreliability;

4CMNshouldbedeployedinpairs,andshouldbeintegratedintoTMSCServer.

4.2.8TMSC(orTMSCServer+TMGW)deploymentshallabidebythefollowingprinciples:

1TelecomoperatorsthathaveTMSC(orTMSCServer+TMGW)equipmentintheexistingnetworkmayusetheexistingequipmenttoswitchovervoiceservice;

2ISoftswitchequipmentshouldbeusedinnewlybuilttolltandemnetworks,itisnolongernecessarytobuildTDMequipment;

3TMSCServershouldbedeployedbylargearea,andshouldbedeployedbyprovinceinprovincialcapitalasTMSCServerquantityincreasesinthegrowthoftraffic;

4TMGshouldbedeployedbyprovinceandshallbeplacedatprovincialcapitalsorhigh-trafficcitieswithbettertransmissionresourcesandIPbearernetworkbackbonenodes;

5TMSCServerandTMGequipmentshallbedeployedinpairssoastosharetrafficloads;

6TDMtolltandemnetworkandsoftswitchtolltandemnetworkshouldbearloadsharinginproportionwithWCDMAtolltraffic.

4.2.9STPdeploymentshallabidebythefollowingprinciples:

1ProvincialHSTPandLSTPmaybedeployedbysignalingtraffic;

2STPequipmentshalltakefulluseofexistingnetworkSTPequipment.NewSTPsshallbedeployedinpairsatseparatebureaulocations.STPdeploymentshallcomplywithprovisionsprescribedinSpecificationsofengineeringdesignforNo.7signalingnetworkYD/T5094.

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4.3CSDomainNetworkOrganization

4.3.1IntheCSnetworkofWCDMA,theA/IuinterfacebetweenMSCServer,MGWandBSC/RNC,Ncinterfacebetween(G)MSCServerand(G)MSCServer(BICCsignal),Nbinterfacebetween(G)MGWand(G)MGWshallpreferablyusetheIPbearerwhenitisavailable,orTDMwhenitisnotavailable.

4.3.2IntheCScorenetworkofWCDMA,theMcinterfacebetween(G)MSC,Serverand(G)MGWshalladopttheIPbearer.

4.3.3WhenCNusestheIPbearer,thenetworkorganizationshallabidebythefollowingprinciples:

1TheNcinterfacesshouldbenetworkedbyplanesorhybrid-layermethod,inwhichprovincialNEsshouldbeinplanes,inter-provincialNEsshouldbeinlayersandBICCsignalingmessagemayberedirectedthroughCMN;

2TheNbinterfaceshouldbenetworkedbyplanes,whileprovincialandinter-provincialNEsshallbeconnecteddirectlythroughtheIPbearernetwork;

3AdedicatedbearershallbeselectedastheIPbearernetwork,andthededicatedVPNshallbeestablishedforsignalingmessages;

4(G)MSCServer,MGW,CMN,TMSCServerandTMGshouldbeconnectedtothededicatedIPbearernetworkthoughCEequipment.

4.3.4WhenTDMisusedasthebearerintheCN,thenetworkorganizationshouldcomplywiththerequirementsstipulatedinDesignSpecificationfor900/1800MHzTDMADigitalCellularMobileCommunicationSystemEngineeringYD/T5104.

4.3.5WhenMSCPOOLisemployedinnetworking,thefollowingrequirementsshallbesatisfied:

1TheNb,NcandMcinterfacesshallbeIP-basedasaprerequisitefornetworkswithMSCPooldeployment;

2ThenumberofnodesshouldnotbelessthanthreeforMSCServerswithMSCPoolemployment;

3MSCPoolshouldbeconstructedwithinthescopeofthelocalnetwork;

4TheredundancyconfigurationsetupduringMSCPoolnetworkingshallsatisfythetrafficloadbearingaftertheswitchoverfromtheretiringMSCServerwiththemaximumcapacitytootherMSCServerswithintheMSCPool;

5MSCPoolnetworkingshouldbeoverlapped;

6DuringplanningMSCPool,continuousdistributionwithinthecoverageareaofthepoolshouldbemaintained;

7Thenetworkingstructureshouldbedeterminedwiththeincorporationoftheactualsituationofsupportingequipmentandthenetworkscale.TheNNSFfunctionsmayberealizedatMGWsideorintheRNCoftheradionetworkacesssideNE.WithinthesameMSCPool,simultaneoususeofMGWforNNSFandBSC/RNCforNNSFshouldbeavoided.

4.4SS7Network

4.4.1WCDMA'sSS7networkorganizationmustcomplywithSpecificationsofengineeringdesignforNo.7signalingnetworkYD/T5094.NEsofthecorenetworkshallbedeployedasSPstoaccesstheSS7network.

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4.4.2TDMorIPbearermaybeusedtocarrythesignalingbetweenSPs,SPandSTP,andSTPs.

4.5InterconnectivitywithOtherNetworks

4.5.1InterconnectivitybetweenCSdomainsshallbeinaccordancewiththefollowingrequirements:

1Whenintra-connectivitytootherservicenetworksofthesametelecommunicationsoperatorexists,thegatewayexchangeofeachlocalnetworkshallconnectdirectlywiththenearbygatewayexchangesofotherservicenetworksofthesameoperator.

2Wheninter-connectivitytonetworksofothertelecommunicationsoperatorexists,thegatewayexchangeofeachlocalnetworkshallconnectdirectlywiththegatewayexchangesofotheroperators.

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5Packet-switchedCoreNetworkDesign

5.1Packet-switchNetworkArchitecture

5.1.1ThecorenetworkoftheWCDMAsystemshouldbedividedintoprovincialnetworkandnationalbackbonenetwork,atwo-layerstructure.

1TheprovincialnetworkisresponsibleforprovidingsubscriberswithPSdataaccessservice;

2Thenationalbackbonenetworkisresponsibleforprovidingtheinterconnectivitybetweenprovincialnetworksofthesametelecomoperator,andinterconnectivityforPSnetworksofdifferenttelecomoperators.

5.2Packet-switchNetworkNodes

5.2.1TheWCDMAnetworkshallincludePSdomainnodesofSGSN,GGSN,CG,BGandDNS.TheHLRsaresharedwithCSdomain.

5.2.2SGSNdeploymentshallabidebythefollowingprinciples:

1SGSNshallsupport2GGPRSandWCDMAaccesssimultaneously.

2SGSNsshallbedeployedinhigh-trafficlocalnetworks,butsmall-trafficlocalnetworksshouldshareoneSGSN.Inthesamelocalnetwork,oneormoreSGSNsmaybedeployedaccordingtothegrowthofsubscribers.FormultipleSGSNs,thedeploymentshallbeatseparatebureaulocations.

3Equipmentwithahigh-capacityandhighprocessingabilityshallbeusedforSGSNs.Thecapacityshallsatisfylocalandroamingsubscribersneedsfortraffichandlinganddatastorage.Anappropriateredundancyshouldbeconsideredwhenevaluatingtheprocessingperformanceoftheequipment.

5.2.3ProvincialGGSNdeploymentshallabidebythefollowingprinciples:

1ThedeploymentofGGSNshallcomprehensivelyconsidersuchfactorsascapacity,security,transmissionconditionsandaccessservice.EachprovincialnetworkshallhaveatleastoneGGSN,andmoreaccordingtothegrowthoftraffic.MultipleGGSNsdeployedforthesameserviceshallbeinaloadsharingconfiguration.

2GGSNshouldbedeployedinprovincialcapitalorlocalnetworkwithhightrafficandoutboundgatewaytotheexternaldatanetwork.

3GGSNshallselectequipmentwithhighreliability,largecapacityandhighprocessingabilitywithproperredundancy.

5.2.4BackboneGGSNdeploymentshallabidebythefollowingprinciples:

1ThebackboneGGSNsshallbedeployedincitieswithnetworkinterconnectionpointsandIPbearernetworkbackhonenodes.Accordingtoroamingtrafficload,thebackboneGGSNsshallbecombinedwithprovincialGGSNorindependently.

2BackboneGGSNsshallbedeployedinpairsinamutualbackupconfiguration.

5.2.5CGdeploymentshallabidebythefollowingprinciples:

1CGsshouldbeindependentlydeployedandshallbedeployedinpairs;

2Equipmentwithahighprocessingabilityshallbeselectedandusedforindependently-deployed

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CGs.

5.2.6BGdeploymentshallabidebythefollowingprinciples:

1BGshouldbedeployedincitieswithnetworkinterconnectionpointsandIPbearernetworkbackhonenodes.Thedeploymentshallbeindependentandinpairsinamutualbackupconfiguration;

2EquipmentwithahighprocessingabilityshallbeselectedandusedforBG.

5.2.7DeploymentsofprovincialnetworkandbackboneDNSshallabidebythefollowingprinciples:

1ProvincialDNSshouldbedeployedintheprovinceswithSGSNinstallation,Toensurenetworksecurity,DNSshallbedeployedinpairs.

2ThebackboneDNSsshallbedeployedincitieswithIPbearernetworkbackhonenodes.Accordingtoroamingtrafficload,thebackboneDNSsshallbecombinedwithprovincialDNSsorindependently.

5.3Packet-switchNetworkOrganization

5.3.1Thelu_PSinterfacebetweenRNCandSGSNmaybeconnectedthroughtheleasedlineorIPbearernetwork.

5.3.2InterconnectivitybetweenCNinnernodesshallabidebythefollowingprinciples:

1IfPSdomainequipmentisusedontheIPnetwork,theprivateIPnetworkorpublicnetworkmaybeusedasthePSbeareraccordingtotelecommunicationsoperator'sactualsituation.

2SGSN,GGSN,DNSandBGshallbeimterconnectedviacorrespondingequipmentaccordingtotheorganizationprinciplesoftheIPbearernetwork.Whentheaboveequipmentinvolvedisdeployedonthesamebureaulocation,interconn