ETSI EN 301 344 V6.4.1 (1999-12)

Digital cellular telecommunications system (Phase 2+) (GSM); General Packet Radio Service (GPRS); Service description; Stage 2 (GSM 03.60 version 6.4.1 Release 1997)

REN/SMG-030360Q6R1

Digitalni celični telekomunikacijski sistem (faza 2+) - Splošna radijska storitev s paketiranimi podatki (GPRS) - Opis storitve - 2. stopnja (GSM 03.60, različica 6.4.1, izdaja 1997)

General Information

• Status: Published
• Publication Date: 28-Dec-1999
• Technical Committee: SMG 3 - Network Aspects
• Current Stage: 12 - Completion
• Due Date: 17-Dec-1999
• Completion Date: 29-Dec-1999
• Mandate: BC-T-330
• Ref Project: SIST EN 301 344 V6.4.1:2005 - Digital cellular telecommunications system (Phase 2+) (GSM); General Packet Radio Service (GPRS); Service description; Stage 2 (GSM 03.60 version 6.4.1 Release 1997)

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital cellular telecommunications system (Phase 2+) (GSM); General Packet Radio Service (GPRS); Service description; Stage 2 (GSM 03.60 version 6.4.1 Release 1997)33.070.01Mobilni servisi na splošnoMobile services in generalICS:Ta slovenski standard je istoveten z:EN 301 344 Version 6.4.1SIST EN 301 344 V6.4.1:2005en01-februar-2005SIST EN 301 344 V6.4.1:2005SLOVENSKI
STANDARD
ETSIEN301344V6.4.1(1999-12)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);Servicedescription;Stage2(GSM03.60version6.4.1Release1997)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 301 344 V6.4.1:2005

ETSIETSIEN301344V6.4.1(1999-12)2(GSM03.60version6.4.1Release1997)ReferenceREN/SMG-030360Q6R1KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM),GPRSETSIPostaladdressF-06921SophiaAntipolisCedex-FRANCEOfficeaddress650RoutedesLucioles-SophiaAntipolisValbonne-FRANCETel.:[phone]Fax:[phone]SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/[e-mail]ETSIdeliverablecanbedownloadedfromhttp://www.etsi.orgIfyoufinderrorsinthepresentdocument,sendyourcommentto:[e-mail]Ideliverablemaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.CopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute1999.Allrightsreserved.SIST EN 301 344 V6.4.1:2005

ETSIETSIEN301344V6.4.1(1999-12)3(GSM03.60version6.4.1Release1997)ContentsIntellectualPropertyRights.8Foreword.81Scope.92References.93Definitions,abbreviationsandsymbols.113.1Definitions.113.2Abbreviations.113.3Symbols.124MainConcepts.135GeneralGPRSArchitectureandTransmissionMechanism.145.1GPRSAccessInterfacesandReferencePoints.145.2NetworkInterworking.145.2.1PSPDNInterworking.155.2.2Internet(IP)Interworking.155.3High-LevelFunctionsRequiredforGPRS.155.3.1NetworkAccessControlFunctions.155.3.1.1RegistrationFunction.165.3.1.2AuthenticationandAuthorisationFunction.165.3.1.3AdmissionControlFunction.165.3.1.4MessageScreeningFunction.165.3.1.5PacketTerminalAdaptationFunction.165.3.1.6ChargingDataCollectionFunction.165.3.2PacketRouteingandTransferFunctions.165.3.2.1RelayFunction.165.3.2.2RouteingFunction.165.3.2.3AddressTranslationandMappingFunction.175.3.2.4EncapsulationFunction.175.3.2.5TunnellingFunction.175.3.2.6CompressionFunction.175.3.2.7CipheringFunction.175.3.2.8DomainNameServerFunction.175.3.3MobilityManagementFunctions.175.3.4LogicalLinkManagementFunctions.175.3.4.1LogicalLinkEstablishmentFunction.175.3.4.2LogicalLinkMaintenanceFunctions.185.3.4.3LogicalLinkReleaseFunction.185.3.5RadioResourceManagementFunctions.185.3.5.1UmManagementFunction.185.3.5.2CellSelectionFunction.185.3.5.3Um-tranxFunction.185.3.5.4PathManagementFunction.185.3.6NetworkManagementFunctions.185.4LogicalArchitecture.185.4.1GPRSSupportNodes.195.4.2GPRSBackboneNetworks.195.4.3HLR.205.4.4SMS-GMSCandSMS-IWMSC.205.4.5GPRSMobileStations.205.5AssignmentofFunctionstoGeneralLogicalArchitecture.215.6TransmissionandSignallingPlanes.225.6.1TransmissionPlane.225.6.2SignallingPlane.235.6.2.1MS-SGSN.23SIST EN 301 344 V6.4.1:2005

ETSIETSIEN301344V6.4.1(1999-12)4(GSM03.60version6.4.1Release1997)5.6.2.2SGSN-HLR.235.6.2.3SGSN-MSC/VLR.245.6.2.4SGSN-EIR.245.6.2.5SGSN-SMS-GMSCorSMS-IWMSC.245.6.2.6GSN-GSN.255.6.2.7GGSN-HLR.255.6.2.7.1MAP-basedGGSN-HLRSignalling.255.6.2.7.2GTPandMAP-basedGGSN-HLRSignalling.266MobilityManagementFunctionality.266.1DefinitionofMobilityManagementStates.266.1.1IDLE(GPRS)State.266.1.2STANDBYState.266.1.3READYState.276.2IDLE/STANDBY/READYStateFunctionality.286.2.1StateTransitionsandFunctions.286.2.2READYTimerFunction.306.2.3PeriodicRAUpdateTimerFunction.306.2.4MobileReachableTimerFunction.306.3InteractionsBetweenSGSNandMSC/VLR.316.3.1AdministrationoftheSGSN-MSC/VLRAssociation.316.3.2CombinedRA/LAUpdating.326.3.3CSPaging.326.3.3.1PagingCo-ordination.336.3.4Non-GPRSAlert.346.3.5MSInformationProcedure.346.3.6MMInformationProcedure.356.4MMProcedures.356.5AttachFunction.366.6DetachFunction.396.6.1MS-InitiatedDetachProcedure.406.6.2Network-InitiatedDetachProcedure.406.6.2.1SGSN-InitiatedDetachProcedure.406.6.2.2HLR-InitiatedDetachProcedure.416.7PurgeFunction.416.8SecurityFunction.426.8.1AuthenticationofSubscriber.426.8.2UserIdentityConfidentiality.436.8.2.1P-TMSISignature.436.8.2.2P-TMSIReallocationProcedure.436.8.3UserDataandGMM/SMSignallingConfidentiality.436.8.3.1ScopeofCiphering.436.8.3.2GPRSCipheringAlgorithm.446.8.4IdentityCheckProcedures.446.9LocationManagementFunction.446.9.1LocationManagementProcedures.456.9.1.1CellUpdateProcedure.456.9.1.2RouteingAreaUpdateProcedure.456.9.1.2.1IntraSGSNRouteingAreaUpdate.466.9.1.2.2InterSGSNRouteingAreaUpdate.476.9.1.3CombinedRA/LAUpdateProcedure.496.9.1.3.1CombinedIntraSGSNRA/LAUpdate.496.9.1.3.2CombinedInterSGSNRA/LAUpdate.516.9.1.4PeriodicRAandLAUpdates.546.10SubscriberManagementFunction.546.10.1SubscriberManagementProcedures.546.10.1.1InsertSubscriberDataProcedure.546.10.1.2DeleteSubscriberDataProcedure.556.11ClassmarkHandling.556.11.1RadioAccessClassmark.556.11.2SGSNClassmark.56SIST EN 301 344 V6.4.1:2005

ETSIETSIEN301344V6.4.1(1999-12)5(GSM03.60version6.4.1Release1997)7NetworkManagementFunctionality.568RadioResourceFunctionality.568.1CellSelectionandReselection.568.2DiscontinuousReception.578.3RadioResourceManagement.578.3.1LayerFunctions.578.3.2ModelofOperation.578.3.2.1DynamicAllocationofRadioResources.578.4PagingforGPRSDownlinkTransfer.579PacketRouteingandTransferFunctionality.589.1DefinitionofPacketDataProtocolStates.589.1.1INACTIVEState.589.1.2ACTIVEState.599.2PDPContextActivation,Modification,andDeactivationFunctions.599.2.1StaticandDynamicPDPAddresses.609.2.2ActivationProcedures.609.2.2.1PDPContextActivationProcedure.609.2.2.2Network-RequestedPDPContextActivationProcedure.619.2.2.2.1SuccessfulNetwork-RequestedPDPContextActivationProcedure.629.2.2.2.2UnsuccessfulNetwork-RequestedPDPContextActivationProcedure.639.2.2.3AnonymousAccessPDPContextActivationProcedure.649.2.3ModificationProcedures.669.2.3.1PDPContextModificationProcedure.669.2.4DeactivationProcedures.679.2.4.1PDPContextDeactivationInitiatedbyMSProcedure.679.2.4.2PDPContextDeactivationInitiatedbySGSNProcedure.679.2.4.3PDPContextDeactivationInitiatedbyGGSNProcedure.689.2.4.4AnonymousAccessPDPContextDeactivationInitiatedbyMSProcedure.689.2.4.5AnonymousAccessPDPContextDeactivationInitiatedbyGGSNProcedure.689.3PacketRouteingandTransferFunction.699.4RelayFunction.709.5PacketTerminalAdaptationFunction.709.6EncapsulationFunction.709.6.1EncapsulationBetweenSGSNandGGSN.709.6.2EncapsulationBetweenSGSNandMS.7010MessageScreeningFunctionality.7111CompatibilityIssues.7112Transmission.7112.1TransmissionModes.7112.1.1GTPTransmissionModes.7112.1.2LLCTransmissionModes.7112.1.3RLCTransmissionModes.7212.2LogicalLinkControlFunctionality.7212.2.1Addressing.7212.2.2Services.7212.2.3Functions.7212.3SubnetworkDependentConvergenceFunctionality.7312.3.1Services.7312.3.2Subfunctions.7412.4GbInterface.7412.4.1PhysicalLayerProtocol.7412.4.2LinkLayerProtocols.7512.4.3BSSGPRSProtocol.7512.4.3.1Inter-dependencyoftheBSSGPandLLCFunctions.7512.4.3.2BSSGPAddressing.7612.4.3.3BVCIContextsinBSSandinSGSN.7612.4.3.4FlowControlBetweenSGSNandBSSovertheGbInterface.76SIST EN 301 344 V6.4.1:2005

ETSIETSIEN301344V6.4.1(1999-12)6(GSM03.60version6.4.1Release1997)12.5AbisInterface.7712.5.1RemotePacketControlUnit.7813InformationStorage.7813.1HLR.7813.2SGSN.8013.3GGSN.8113.4MS.8213.5MSC/VLR.8313.6RecoveryandRestorationProcedures.8313.6.1HLRFailure.8313.6.2SGSNFailure.8413.6.3GGSNFailure.8413.6.4VLRFailure.8414Identities.8514.1IMSI.8514.2PacketTMSI.8514.3NSAPIandTLLI.8514.4PDPAddress.8614.5TID.8614.6RouteingAreaIdentity.8614.7CellIdentity.8714.8GSNAddresses.8714.8.1GSNAddress.8714.8.2GSNNumber.8714.9AccessPointName.8715OperationalAspects.8715.1Charging.8715.1.1ChargingInformation.8815.1.2ReverseCharging.8815.2QualityofServiceProfile.8815.2.1PrecedenceClass.8915.2.2DelayClass.8915.2.3ReliabilityClass.8915.2.4ThroughputClasses.9015.2.4.1PeakThroughputClass.9015.2.4.2MeanThroughputClass.9016InteractionswithOtherGSMServices.9116.1Point-to-pointShortMessageService.9116.1.1Mobile-terminatedSMSTransfer.9216.1.1.1UnsuccessfulMobile-terminatedSMSTransfer.9216.1.2Mobile-originatedSMSTransfer.9416.2Circuit-switchedServices.9416.2.1SuspensionofGPRSServices.9416.2.2GPRSandDedicatedModePriorityHandling.9516.3SupplementaryServices.96SIST EN 301 344 V6.4.1:2005

ETSIETSIEN301344V6.4.1(1999-12)7(GSM03.60version6.4.1Release1997)AnnexA(normative):GGSNSelectionDecisionTree.97A.1Definitions.97A.2APN(R).97A.3APNSelectionRules.97AnnexB(informative):DataTransmissionRouteingExamples.101B.1DataRouteingforanMSinitsHomePLMNtoandfromanExternalPDN.101B.2DataRouteingforaRoamingMStoandfromanExternalPDN.102B.3MS-to-MSDataRouteingviatheSameGGSN.102B.4MS-to-MSDataRouteingviaDifferentGGSNs.103AnnexC(informative):Figures.104AnnexD(informative):Tables.106AnnexE(informative):Documenthistory.107History.108SIST EN 301 344 V6.4.1:2005

ETSIETSIEN301344V6.4.1(1999-12)8(GSM03.60version6.4.1Release1997)IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinSR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinSR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbytheSpecialMobileGroup(SMG).Thepresentdocumentdefinesthestage-2servicedescriptionforaGeneralPacketRadioService(GPRS)withinthedigitalcellulartelecommunicationssystem(Phase2+).ThecontentsofthepresentdocumentaresubjecttocontinuingworkwithinSMGandmaychangefollowingformalSMGapproval.ShouldSMGmodifythecontentsofthepresentdocumentitwillthenbere-submittedforOAPwithanidentifyingchangeofreleasedateandanincreaseinversionnumberasfollows:Version6.x.ywhere:6indicatesGSMRelease1997ofPhase2+.xtheseconddigitisincrementedforchangesofsubstance,i.e.technicalenhancements,corrections,updates,etc.ythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.NationaltranspositiondatesDateofadoptionofthisEN:17December1999DateoflatestannouncementofthisEN(doa):31March2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30September2000DateofwithdrawalofanyconflictingNationalStandard(dow):30September2000SIST EN 301 344 V6.4.1:2005

ETSIETSIEN301344V6.4.1(1999-12)9(GSM03.60version6.4.1Release1997)1ScopeThepresentdocumentdefinesthestage-2servicedescriptionforaGeneralPacketRadioService(GPRS)onGSM.CCITTI.130[29]describesathree-stagemethodforcharacterisationoftelecommunicationservices,andCCITTQ.65[31]definesstage2ofthemethod.Thisversionofthestage-2servicedescriptioncoversthefirstphaseofGPRS,anddoesnotmeetalltheservicesandfunctionalitydescribedinGSM02.60[3].AnupdatetothepresentdocumenttomeetalltheservicesandfunctionalityinGSM02.60isforeseen.ThepresentdocumentdoesnotcoverthelowerlayersoftheGPRSGSMradiointerface.GSM03.64[11]containsanoveralldescriptionoftheradiointerface.ThepresentdocumentdoesnotcovertheGPRSpoint-to-multipointservices.GSM03.61[9]containsthePTMmulticaststage-2servicedescription.GSM03.62[10]containsthePTMgroupcallstage-2servicedescription.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.•Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.•Foraspecificreference,subsequentrevisionsdonotapply.•Foranon-specificreference,thelatestversionapplies.•Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.•ForthisRelease1997document,referencestoGSMdocumentsareforRelease1997versions(version6.x.y).[1]GSM01.04:"Digitalcellulartelecommunicationssystem(Phase2+);Abbreviationsandacronyms".[2]GSM01.61:"Digitalcellulartelecommunicationssystem(Phase2+);GPRScipheringalgorithmrequirements".[3]GSM02.60:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);Servicedescription;Stage1".[4]GSM03.03:"Digitalcellulartelecommunicationssystem(Phase2+);Numbering,addressingandidentification".[5]GSM03.07:"Digitalcellulartelecommunicationssystem(Phase2+);Restorationprocedures".[6]GSM03.20:"Digitalcellulartelecommunicationssystem(Phase2+);Securityrelatednetworkfunctions".[7]GSM03.22:"Digitalcellulartelecommunicationssystem(Phase2+);FunctionsrelatedtoMobileStation(MS)inidlemodeandgroupreceivemode".[8]GSM03.40:"Digitalcellulartelecommunicationssystem(Phase2+);TechnicalrealizationoftheShortMessageService(SMS);Point-to-Point(PP)".[9]GSM03.61:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);PointtoMultipointMulticastServiceDescription;Stage2".[10]GSM03.62:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);PointtoMultipointGroupCallServiceDescription;Stage2".SIST EN 301 344 V6.4.1:2005

ETSIETSIEN301344V6.4.1(1999-12)10(GSM03.60version6.4.1Release1997)[11]GSM03.64:"Digitalcellulartelecommunicationssystem(Phase2+);OveralldescriptionoftheGeneralPacketRadioService(GPRS)Radiointerface;Stage2".[12]GSM04.07:"Digitalcellulartelecommunicationssystem(Phase2+);Mobileradiointerfacesignallinglayer3;Generalaspects".[13]GSM04.08:"Digitalcellulartelecommunicationssystem(Phase2+);Mobileradiointerfacelayer3specification".[14]GSM04.60:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);MobileStation(MS)-BaseStationSystem(BSS)interface;RadioLinkControl/MediumAccessControl(RLC/MAC)protocol".[15]GSM04.64:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);LogicalLinkControl(LLC)".[16]GSM04.65:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);SubnetworkDependentConvergenceProtocol(SNDCP)".[17]GSM07.60:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);MobileStation(MS)supportingGPRS".[18]GSM08.08:"Digitalcellulartelecommunicationssystem(Phase2+);MobileSwitchingCentre-BaseStationSystem(MSC-BSS)interface:Layer3specification".[19]GSM08.14:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);BaseStationSystem(BSS)-ServingGPRSSupportNode(SGSN)interface;Gbinterfacelayer1".[20]GSM08.16:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);BaseStationSystem(BSS)-ServingGPRSSupportNode(SGSN)interface;NetworkService".[21]GSM08.18:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);BaseStationSystem(BSS)-ServingGPRSSupportNode(SGSN);BSSGPRSProtocol(BSSGP)".[22]GSM08.60:"Digitalcellulartelecommunicationssystem(Phase2+);InbandcontrolofremotetranscodersandrateadaptorsforEnhancedFullRate(EFR)andfullratetrafficchannels."[23]GSM09.02:"Digitalcellulartelecommunicationssystem(Phase2+);MobileApplicationPart(MAP)specification".[24]GSM09.16:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);ServingGPRSSupportNode(SGSN)-VisitorsLocationRegister(VLR);Gsinterfacenetworkservicespecification".[25]GSM09.18:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);ServingGPRSSupportNode(SGSN)-VisitorsLocationRegister(VLR);Gsinterfacelayer3specification".[26]GSM09.60:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralPacketRadioService(GPRS);GPRSTunnellingProtocol(GTP)acrosstheGnandGpInterface".[27]GSM09.61:"Digitalcellulartelecommunicationssystem(Phase2+);GeneralrequirementsoninterworkingbetweenthePublicLandMobileNetwork(PLMN)supportingGeneralPacketRadioService(GPRS)andPacketDataNetworks(PDN)".[28]GSM11.11:"Digitalcellulartelecommunicationssystem(Phase2+);SpecificationoftheSubscriberIdentityModule-MobileEquipment(SIM-ME)interface".[29]CCITTRecommendationsI.130:"Generalmodellingmethods–MethodforthecharacterisationoftelecommunicationservicessupportedbyanISDNandnetworkcapabilitiesofanISDN".[30]CCITTRecommendationE.164:"NumberingplanfortheISDNera".SIST EN 301 344 V6.4.1:2005

ETSIETSIEN301344V6.4.1(1999-12)11(GSM03.60version6.4.1Release1997)[31]CCITTRecommendationQ.65:"Methodology–Stage2ofthemethodforthecharacterizationofservicessupportedbyanISDN".[32]CCITTRecommendationV.42bis:"Datacommunicationoverthetelephonenetwork–Datacompressionproceduresfordatacircuit-terminatingequipment(DCE)usingerrorcorrectionprocedures".[33]CCITTRecommendationX.3:"Packetassemblydisassemblyfacility(PAD)inapublicdatanetwork".[34]CCITTRecommendationX.25:"Interfacebetweendataterminalequipment(DTE)anddatacircuit-terminatingequipment(DCE)forterminalsoperatinginthepacketmodeandconnectedtopublicdatanetworksbydedicatedcircuit".[35]CCITTRecommendationX.28:"DTE/DCEinterfaceforastart-stopmodedataterminalequipmentaccessingthepacketassembly/disassemblyfacility(PAD)inapublicdatanetworksituatedinthesamecountry".[36]CCITTRecommendationX.29:"Proceduresfortheexchangeofcontrolinformationanduserdatabetweenapacketassembly/disassembly(PAD)facilityandapacketmodeDTEoranotherPAD".[37]CCITTRecommendationX.75:"Packet-switchedsignallingsystembetweenpublicnetworksprovidingdatatransmissionservices".[38]CCITTRecommendationX.121:"InternationalNumberingPlanforPublicDataNetworks".[39]IETFRFC768(1980):"UserDatagramProtocol"(STD6).[40]IETFRFC791(1981):"InternetProtocol"(STD5).[41]IETFRFC792(1981):"InternetControlMessageProtocol"(STD5).[42]IETFRFC793(1981):"Transmi
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