ETSI ETS 300 788 ed.1 (1997-07)
Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobile communications (GSM); Integrated Services Digital Network (ISDN); DECT access to GSM via ISDN; Functional capabilities and information flows
Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobile communications (GSM); Integrated Services Digital Network (ISDN); DECT access to GSM via ISDN; Functional capabilities and information flows
DE/DECT-010064
Digitalne izboljšane brezvrvične telekomunikacije (DECT) - Globalni sistem mobilnih komunikacij (GSM) - Digitalno omrežje z integriranimi storitvami (ISDN) - Dostop DECT do GSM preko ISDN - Funkcijske zmožnosti in informacijski tokovi
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobile communications (GSM); Integrated Services Digital Network (ISDN); DECT access to GSM via ISDN; Functional capabilities and information flows33.080Digitalno omrežje z integriranimi storitvami (ISDN)Integrated Services Digital Network (ISDN)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)33.070.30'(&7Digital Enhanced Cordless Telecommunications (DECT)ICS:Ta slovenski standard je istoveten z:ETS 300 788 Edition 13SIST ETS 300 788:2001en01-IHEUXDU-20013SIST ETS 300 788:2001SLOVENSKI
STANDARD
SIST ETS 300 788:2001
EUROPEANETS 300 788TELECOMMUNICATIONJuly 1997STANDARDSource: EP DECTReference: DE/DECT-010064ICS:33.020Key words:CTM, DECT, GSM, ISDN, mobility, radio, stage 2Digital Enhanced Cordless Telecommunications (DECT);Global System for Mobile communications (GSM);Integrated Services Digital Network (ISDN);DECT access to GSM via ISDN;Functional capabilities and information flowsETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.frTel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1997. All rights reserved.SIST ETS 300 788:2001
Page 2ETS 300 788: July 1997Whilst every care has been taken in the preparation and publication of this document, errors in content,typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to"ETSI Editing and Committee Support Dept." at the address shown on the title page.SIST ETS 300 788:2001
Page 3ETS 300 788: July 1997ContentsForeword.51Scope.72Normative references.83Definitions and abbreviations.83.1Definitions.83.2Abbreviations.104Mobility management features.104.1Functional model.104.1.1Functional model description.104.1.2Description of functional entities.114.1.2.1Mobile user's MM agent, FE1.114.1.2.2Currently visited DECT access network MM control, FE2.114.1.2.3Global network MM control, FE3.114.1.2.4Previously visited DECT access network MM control, FE4.114.1.3Relationship of functional model to basic call functional model.114.2Information flows.114.2.1Definition of information flows.114.2.1.1ra-detach.124.2.1.2ra-identity-request.124.2.1.3ra-location-registration.134.2.1.4ra-temporary-identity-assign.144.2.1.5ra-temporary-identity-result.144.2.1.6ra-authenticate.144.2.1.7ra-ciphering-setting.154.2.1.8rb-detach.154.2.1.9rb-identity-request.154.2.1.10rb-location-update.164.2.1.11rb-temporary-identity-assign.164.2.1.12rb-temporary-identity-accept.164.2.1.13rb-authenticate.174.2.1.14rb-authenticate-reject.174.2.1.15rb-ciphering-setting.174.2.1.16rc-location-delete.174.2.2Relationship of information flows to basic call information flows.174.2.3Examples of information flow sequences.174.2.3.1Normal operation of MM features.184.2.3.2Exceptional operation of MM features.214.3Functional entity actions.214.3.1Functional entity actions of FE1.214.3.2Functional entity actions of FE2.224.3.3Functional entity actions of FE3.244.3.4Functional entity actions of FE4.254.4Functional entity behaviour.254.4.1Behaviour of FE1.254.4.2Behaviour of FE2.294.4.3Behaviour of FE3.324.4.4Behaviour of FE4.344.5Allocation of functional entities to physical equipment.344.6Interworking considerations.345Call handling.355.1Functional model.355.1.1Functional model description.35SIST ETS 300 788:2001
Page 4ETS 300 788: July 19975.1.2Description of FEs.355.2Information flows.355.2.1Definition of information flows.355.2.2Examples of information flow sequences.355.3Functional entity actions.355.4Functional entity behaviour.355.5Allocation of functional entities to physical equipment.365.6Interworking considerations.36History.37SIST ETS 300 788:2001
Page 5ETS 300 788: July 1997ForewordThis European Telecommunication Standard (ETS) has been produced by the Digital Enhanced CordlessTelecommunications (DECT) Project of the European Telecommunications Standards Institute (ETSI).Transposition datesDate of adoption:20 June 1997Date of latest announcement of this ETS (doa):31 October 1997Date of latest publication of new National Standardor endorsement of this ETS (dop/e):30 April 1998Date of withdrawal of any conflicting National Standard (dow):30 April 1998SIST ETS 300 788:2001
Page 6ETS 300 788: July 1997Blank pageSIST ETS 300 788:2001
Page 7ETS 300 788: July 19971ScopeThis European Telecommunication Standard (ETS) defines the functional capabilities and informationflows for the scenarios where Global System for Mobile communications (GSM) basic services areprovided via the Digital Enhanced Cordless Telecommunications System (DECT) air interface for the casethat the DECT network elements are interconnected with the GSM Public Land Mobile Network (PLMN)via Integrated Services Digital Network (ISDN) interfaces.The general description of the service requirements are specified in ETS 300 787 [1].The following core features are covered by this ETS:-outgoing calls;-emergency calls;-incoming calls;-location updating, location cancellation;-IMSI attach/detach;-TMSI reallocation procedure (temporary identity assign);-IMSI authentication;-ciphering;-identity request.Handover, which is another Mobility Management (MM) service, is outside the scope of this ETS.The service is produced in three stages according to the method specified inCCITT Recommendation I.130 [6]. Stage 2 identifies the Functional Entities (FEs) involved in the serviceand the information flows between them. This ETS is specified according to the methodology specified inCCITT Recommendation Q.65 [7].The purpose of the stage 2 specification is to guide and constrain the work on signalling protocols atstage 3, while fulfilling the requirements of stage 1. Stage 1 and stage 3 are defined in separatestandards.This ETS distinguishes DECT access networks from the global network. The DECT access networkprovides the point of attachment for the served user and ensures a transparent access to the GSMservices. The global network is the GSM PLMN or network of GSM PLMNs which provides the serveduser with the global service specified in this ETS. The specification of information flows within the globalnetwork (e.g. between Mobile Switching Centres (MSCs), Home Location Register (HLR) and VisitorLocation Register (VLR)) is beyond the scope of this ETS.Furthermore, conformance to this ETS is met by conforming to the stage 3 standards which fulfil therequirements of this ETS that are relevant to the equipment for which the stage 3 standard applies.Therefore no method of testing is provided for this ETS.SIST ETS 300 788:2001
Page 8ETS 300 788: July 19972Normative referencesThis ETS incorporates, by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of these publicationsapply to this ETS only when incorporated in it by amendment or revision. For undated references the latestedition of the publication referred to applies.[1]ETS 300 787: "Digital Enhanced Cordless Telecommunications / Global Systemfor Mobile communications (DECT/GSM); DECT access to GSM via IntegratedServices Digital Network (ISDN); General description of service requirements".[2]ETS 300 444: "Digital European Cordless Telecommunications (DECT); GenericAccess Profile (GAP)".[3]ETS 300 370: "Digital Enhanced Cordless Telecommunications / Global Systemfor Mobile communications (DECT/GSM) inter-working profile; Access andmapping (Protocol/procedure description for 3,1 kHz speech service)".[4]ETS 300 557: "Digital cellular telecommunications system (Phase 2); Mobile radiointerface layer 3 specification (GSM 04.08)".[5]ITU-T Recommendation Q.71 (1993): "ISDN circuit mode switched bearerservices".[6]CCITT Recommendation I.130 (1988): "Method for the characterization oftelecommunication services supported by an ISDN and network capabilities ofan ISDN".[7]CCITT Recommendation Q.65 (1988): "Stage 2 of the method for thecharacterization of services supported by an ISDN".[8]ETS 300 434-1: "Digital Enhanced Cordless Telecommunications (DECT) andIntegrated Services Digital Network (ISDN) interworking for end systemconfiguration; Part 1: Interworking specification".[9]ITU-T Recommendation Z.100: "CCITT Specification and description language(SDL)".3Definitions and abbreviations3.1DefinitionsFor the purposes of this ETS, the following definitions apply:DECT access network: Physical entity that contains all of the elements of a DECT Fixed Part (FP) andthat is attached to a GSM MSC.NOTE 1:A DECT access network provides a transparent access to the services of the GSMPLMN. This does however not exclude that it may in addition provide services andswitching capabilities to its own users.DECT Fixed Part (FP): A physical grouping that contains all of the elements in the DECT networkbetween the local network and the DECT air interface.NOTE 2:A DECT FP contains the logical elements of at least one fixed radio termination, plusadditional implementation specific elements.DECT location area: The domain in which a DECT Portable Part (PP) may receive and/or make calls asa result of a single location registration in the DECT access network.SIST ETS 300 788:2001
Page 9ETS 300 788: July 1997global network: The GSM PLMN or network of GSM PLMNs which provides the served user with theglobal service specified in this ETS.GSM location area: The domain in which a DECT PP may receive and/or make calls as a result of asingle location updating in the GSM network.NOTE 3:A GSM location area may cover more than one DECT location area.GSM service provider: An administration which offers global mobile telecommunication services to itssubscribers.GSM services: Services which are offered to the subscriber/user by a GSM Service Provider and whichare defined by the appropriate GSM specifications.location area: The domain in which a DECT PP may receive and/or make calls as a result of a singlelocation registration/updating in the network.location registration: The process whereby the position of a PP is determined to the level of one locationarea, and this position is updated in the network.location updating: The process whereby the position of a PP is determined to the level of one locationarea, and this position is updated in the network.NOTE 4:DECT and GSM respectively use the terms location registration and location updatingfor corresponding processes.MSC area: The MSC area is the part of the network covered by a MSC. A MSC area may consist of oneor several GSM location areas. A MSC area may also consist of one or several BSC areas and/or one orseveral DECT location areas.network: The totality of GSM and DECT access network elements through which the GSM serviceprovider provides its services to the served user.Public Land Mobile Network (PLMN): A PLMN is established and operated by an administration or forthe specific purpose of providing land mobile telecommunication services to the public. A PLMN may beregarded as an extension of a network (e.g. ISDN); it is a collection of MSC areas within a commonnumbering plan (e.g. same national destination code) and a common routeing plan. The MSCs are thefunctional interfaces between the fixed networks and a PLMN for call set-up. Functionally the PLMNs maybe regarded as independent telecommunication entities even though different PLMNs may beinterconnected through the ISDN/PISN and PDNs for forwarding of calls or network information. A similartype of interconnection may exist for the interaction between the MSCs of one PLMN.served user: The user of a DECT PP who has a subscription with the GSM service provider. The DECTPP accepts the GSM Subscriber Identity Module (SIM) and optionally the DECT DAM with a GSMapplication.NOTE 5:For the purpose of this ETS no distinction is made between the served user and itsassociated DECT PP.SIST ETS 300 788:2001
Page 10ETS 300 788: July 19973.2AbbreviationsFor the purposes of this ETS, the following abbreviations apply:CCCall Control (functional entity)CCACall Control Agent (functional entity)DECTDigital Enhanced Cordless TelecommunicationsFEFunctional EntityFPFixed PartGSMGlobal System for Mobile communicationsHLRHome Location RegisterIMEIInternational Mobile Equipment IdentityIMEISVIMEI Software Version numberIMSIInternational Mobile Subscriber Identity (GSM)IPEIInternational Portable Equipment IdentityIPUIInternational Portable User Identity (DECT)ISDNIntegrated Services Digital NetworkMMMobility ManagementMSCMobile Switching CentrePABXPrivate Automatic Branch ExchangePDNPacket Data NetworkPISNPrivate Integrated Services NetworkPLMNPublic Land Mobile NetworkPPPortable PartRANDRandom numberRESA Response calculated by a PPSDLSpecification and Description LanguageSIMSubscriber Identity ModuleSRESA GSM specific authentication RES calculated by the GSM SIM or the DAMTETerminal EquipmentTMSITemporary Mobile Subscriber Identity (GSM)TPUITemporary Portable User IdentityVLRVisitor Location Register4Mobility management features4.1Functional model4.1.1Functional model descriptionThe functional model for the MM features shall be as shown in figure 1.FE1FE2rarbFE3FE4rcFigure 1: Functional model for MM featuresThe FEs for the MM features shall be as follows:FE1:Mobile user's MM agent;FE2:Currently visited DECT access network MM control;FE3:Global network MM control;FE4:Previously visited DECT access network MM control.The following functional relationships shall exist between these functional entities:rabetween FE1 and FE2;rbbetween FE2 and FE3;rcbetween FE3 and FE4.SIST ETS 300 788:2001
Page 11ETS 300 788: July 19974.1.2Description of functional entities4.1.2.1Mobile user's MM agent, FE1This FE performs the user specific part of the MM features. It initiates and/or performs MM procedures onbehalf of the mobile user. FE1 is also responsible for passing information to the mobile user, if applicable.4.1.2.2Currently visited DECT access network MM control, FE2FE2 performs the DECT access network specific part of the MM features at the current location of theserved user. If involvement of the global network is required, FE2 cooperates with FE3 in providing therequired feature.FE2 receives information from FE1 when a MM procedure has been invoked. FE2 also can trigger FE1 toperform actions for MM procedures initiated by the network (either by FE2 itself or on initiative of FE3).NOTE:The possible information transfer within sub-entities in FE2 (e.g. when FE2 consists ofmore than one DECT location area) is out of the scope of this ETS.4.1.2.3Global network MM control, FE3FE3 performs the global network specific part of the MM features, i.e. the mobility actions which are ofglobal significance.FE3 receives information from FE2 that a MM procedure has been invoked. FE3 also can trigger FE1/FE2to perform actions for network initiated MM procedures.NOTE:The possible information transfer within sub-entities in FE3 (e.g. between MSC's, HLRand VLR) is out of the scope of this ETS.4.1.2.4Previously visited DECT access network MM control, FE4FE4 performs the DECT access network specific part of the MM features at the previous location of theserved user. FE4 receives information from FE3 that a served user is no longer in the domain controlledby FE4. On receipt of such information, FE4 will delete all temporary data stored for that user.NOTE:The possible information transfer within sub-entities in FE4 (e.g. when FE4 consists ofmore than one DECT location area) is out of the scope of this ETS.4.1.3Relationship of functional model to basic call functional modelThe functional model for MM features is independent of the functional model for basic call.4.2Information flows4.2.1Definition of information flowsIn the tables listing the elements in information flows, the column headed "Request" indicates which ofthese elements are mandatory (M) and which are optional (O) in a request/indication information flow, andthe column headed "Confirm" (confirmed information flows only) indicates which of these elements aremandatory (M) and which are optional (O) in a response/confirmation information flow.SIST ETS 300 788:2001
Page 12ETS 300 788: July 19974.2.1.1ra-detachra-detach is an unconfirmed information flow across ra from FE1 to FE2 to achieve a deactivation of theuser's terminal in the network.Table 1: Contents of ra-detachService elementRequestNotesPortable identityM-Contains the user's DECT identity.-If "temporary identity" is not available, the onlyallowed value of "portable identity" shall be of typeIPUI, with IPUI-type R, i.e. the IPUI shallincorporate an IMSI.-Other allowed values (of type TPUI, IPEI) may beused in the non-DECT/GSM interworking case orwhen "mobile identity" is also included.Temporary identityO-Contains the user's GSM temporary identity.-Allowed value is of type GSM TMSI.-Shall be included if previously received from thenetwork before.IPEI:International Portable Equipment Identity.IPUI:International Portable User Identity.TPUI:Temporary Portable User Identity.TMSI:Temporary Mobile Subscriber Identity.4.2.1.2ra-identity-requestra-identity-request is a confirmed information flow across ra between FE2 and FE1 which is used by FE2to obtain one of the user's terminal identities.Table 2: Contents of ra-identity-requestService elementRequestConfirmNotesIdentity typeM--This service element indicates thetype of identity requested by thenetwork.-For the scope of this ETS the onlyvalues of relevance are the types"Temporary identity (TMSI)", "user'sportable identity (IPUI)" and "portableequipment identity (IPEI)".Portable identity-O-Contains either the user's or theequipment's DECT identity (i.e. IPUIor IPEI).-If the requested Identity type is"User's portable identity", then thisservice element shall include a valueof type IPUI with IPUI-type R, i.e.shall include an IMSI.-If the requested Identity type is"Portable equipment identity", thisservice element shall include anIPEI-value.Temporary identity-O-Contains the user's temporary GSMidentity, the TMSI.-Shall be included if the requestedIdentity type is "Temporary identity",and if this identity is available.SIST ETS 300 788:2001
Page 13ETS 300 788: July 19974.2.1.3ra-location-registrationra-location-registration is a confirmed information flow across ra between FE1 and FE2 which is used toinform FE2 that the served user has roamed to another DECT location area or that a non-roaming serveduser is now able to receive incoming calls.Table 3: Contents of ra-location-registrationService elementRequestConfirmNotesPortable identityM--Contains the user's DECT identity.-Allowed value is of type IPUI, TPUI.The IPUI-type shall be R, i.e. the IPUIshall incorporate an IMSI.Fixed identityO-DECT specific identity which is not ofrelevance for DECT/GSM interworkingcase, and therefore out of the scope of thisETS.Location area identityOM-Can contain the DECT location areaidentity and the GSM location areaidentity.-In the "request/indication" thiselement may include the previousDECT location area. If available, alsothe GSM location area identity shallbe included.-In the "resp/conf" this element shallinclude the current DECT locationarea identity, and, if applicable andavailable, also the GSM location areaidentity.Use TPUI-OTo mandate the use of the temporaryidentity.Temporary identityOO-Contains the user's GSM temporaryidentity, the GSM TMSI.-This identity shall be included in the"request/indication" if previouslyreceived from the network.-It shall be included in the "resp/conf"if a new identity has been provided bythe global network.Cipher key sequence numberM-This parameter gives information to FE2 onthe ciphering key that is intended to be usedby FE1.Terminal / setup capabilitiesand model identifierO-May be needed to generate an IMEISV lateron.Result-MThis takes the values "accepted" and"rejected".Cause of rejection-O-Only present if result is "rejected".-At least the following values areallowed: "user identity not known","served user not permitted to registerin the current location area", "serveduser failed authentication", "locationregistration temporarily not possible".Duration-OIf present this element defines for how longat least the location registration andtemporary identity (if provided) are valid.SIST ETS 300 788:2001
Page 14ETS 300 788: July 19974.2.1.4ra-temporary-identity-assignra-temporary-identity-assign is a confirmed information flow across ra between FE2 and FE1 which isused to assign or delete a temporary identity to/from the user's terminal.Table 4: Contents of ra-temporary-identity-assignService ElementRequestConfirmNotesPortable identityO-This service element is not relevant for theDECT/GSM interworking case.GSM location area identityM-Contains the GSM location area for whichthe newly assigned temporary identity isvalid.Temporary identityM-Contains the user's temporary GSM identity(TMSI). For the DECT/GSM interworkingcase, this element is mandatory.Result-MAccepted or rejected.Cause of rejection-OMay be included if the result is "rejected".4.2.1.5ra-temporary-identity-resultra-temporary-identity-result is an unconfirmed information flow across ra from FE1 to FE2 which is used toconfirm the allocation of a (new) temporary identity to the user's terminal as a result of a successfullocation registration procedure.Table 5: Contents of ra-temporary-identity-resultService ElementRequestNotesResultMAccepted or rejected.Cause of rejectionOMay be included if the result is "rejected".4.2.1.6ra-authenticatera-authenticate is a confirmed information flow across ra between FE2 and FE1 which is used toauthenticate the mobile user.Table 6: Contents of ra-authenticateService ElementRequestConfirmNotesAuthentication typeM-Indicates "GSM authentication".Random number (RAND)M-Contains a random number, which is usedfor the calculation of the authenticationresult (RAND).Cipher key sequence numberM-This number must be used by the terminalfor association with the calculated cipherkey, which results from the auth/cipheringkey generation algorithm.Result-MIndicates whether the request forauthentication is accepted or rejected.Authentication resultOIncluded if the result is "accepted", containsthe calculated result of the authentication(RES).Cause of rejection-OMay be included if Result is "rejected", andindicates the reason why the authenticationrequest could not be accepted.SIST ETS 300 788:2001
Page 15ETS 300 788: July 19974.2.1.7ra-ciphering-settingra-ciphering-setting is a confirmed information flow across ra between FE2 and FE1 which is used toestablish ciphering for the radio link.Table 7: Contents of ra-ciphering-settingService ElementRequestConfirmNotesCipher key sequence numberM-Contains the number of the cipher keywhich shall be used to encrypt the radio linkThe cipher key number has been receivedpreviously in one of the followingprocedures: DECT location registration,paging, PP initiated call establishment orthe value has been given from the MSCduring a previous authentication procedure.The latest received value is used.Result-MAccepted or rejected.Cause of rejection-OMay be included if the result is "rejected".4.2.1.8rb-detachrb-detach is an unconfirmed information flow across rb from FE2 to FE3 to achieve a deactivation of theuser's terminal in the global network.Table 8: Contents of rb-detachService ElementRequestNotesTerminal capabilitiesMShall indicate a revision level of Phase 2 orhigher and the support of encryption A 5/1.Mobile identityM-Contains the user's GSM identity-Allowed values: GSM TMSI or IMSI-If TMSI is available, then this shall beused instead of IMSI.4.2.1.9rb-identity-requestrb-identity-request is a confirmed information flow across rb between FE3 and FE2 which is used by FE3to obtain one of the user's terminal identities.Table 9: Contents of rb-identity-requestService ElementRequestConfirmNotesMobile identityO-Identification of the user from which anadditional identity is requested.Mobile identity typeM-This takes one of the values IMSI, TMSI,IMEI, IMEISV.Mobile identity-MContains the user's GSM identity of the typeas requested.IMEI:International Mobile Equipment Identity.IMEISV:IMEI Software Version number.IMSI:International Mobile Subscriber Identity.TMSI:Temporary Mobile Subscriber Identity.SIST ETS 300 788:2001
Page 16ETS 300 788: July 19974.2.1.10rb-location-updaterb-location-update is a confirmed information flow across rb between FE2 and FE3 which is used to informFE3 that the served user has roamed to another GSM location area or that a non-roaming served user isnow ready to receive incoming calls.Table 10: Contents of rb-location-updateService ElementRequestConfirmNotesLocation update typeM-This takes the values "normal updating","periodic updating" and "IMSI attach".Cipher key sequenc
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SLOVENSKI STANDARD
SIST ETS 300 788:2001
01-september-2001
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Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobile
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GSM via ISDN; Functional capabilities and information flows
Ta slovenski standard je istoveten z: ETS 300 788 Edition 1
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33.070.30 'LJLWDOQHL]EROMãDQH Digital Enhanced Cordless
EUH]YUYLþQHWHOHNRPXQLNDFLMH Telecommunications (DECT)
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33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
SIST ETS 300 788:2001 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST ETS 300 788:2001
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SIST ETS 300 788:2001
EUROPEAN ETS 300 788
TELECOMMUNICATION July 1997
STANDARD
Source: EP DECT Reference: DE/DECT-010064
ICS: 33.020
Key words: CTM, DECT, GSM, ISDN, mobility, radio, stage 2
Digital Enhanced Cordless Telecommunications (DECT);
Global System for Mobile communications (GSM);
Integrated Services Digital Network (ISDN);
DECT access to GSM via ISDN;
Functional capabilities and information flows
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.fr
Tel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1997. All rights reserved.
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SIST ETS 300 788:2001
Page 2
ETS 300 788: July 1997
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.
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SIST ETS 300 788:2001
Page 3
ETS 300 788: July 1997
Contents
Foreword .5
1 Scope .7
2 Normative references.8
3 Definitions and abbreviations .8
3.1 Definitions .8
3.2 Abbreviations .10
4 Mobility management features .10
4.1 Functional model.10
4.1.1 Functional model description.10
4.1.2 Description of functional entities.11
4.1.2.1 Mobile user's MM agent, FE1 .11
4.1.2.2 Currently visited DECT access network MM control, FE2.11
4.1.2.3 Global network MM control, FE3 .11
4.1.2.4 Previously visited DECT access network MM control, FE4.11
4.1.3 Relationship of functional model to basic call functional model .11
4.2 Information flows.11
4.2.1 Definition of information flows .11
4.2.1.1 ra-detach.12
4.2.1.2 ra-identity-request.12
4.2.1.3 ra-location-registration.13
4.2.1.4 ra-temporary-identity-assign.14
4.2.1.5 ra-temporary-identity-result.14
4.2.1.6 ra-authenticate.14
4.2.1.7 ra-ciphering-setting.15
4.2.1.8 rb-detach.15
4.2.1.9 rb-identity-request.15
4.2.1.10 rb-location-update.16
4.2.1.11 rb-temporary-identity-assign.16
4.2.1.12 rb-temporary-identity-accept.16
4.2.1.13 rb-authenticate.17
4.2.1.14 rb-authenticate-reject.17
4.2.1.15 rb-ciphering-setting.17
4.2.1.16 rc-location-delete .17
4.2.2 Relationship of information flows to basic call information flows.17
4.2.3 Examples of information flow sequences.17
4.2.3.1 Normal operation of MM features.18
4.2.3.2 Exceptional operation of MM features .21
4.3 Functional entity actions .21
4.3.1 Functional entity actions of FE1 .21
4.3.2 Functional entity actions of FE2 .22
4.3.3 Functional entity actions of FE3 .24
4.3.4 Functional entity actions of FE4 .25
4.4 Functional entity behaviour .25
4.4.1 Behaviour of FE1.25
4.4.2 Behaviour of FE2.29
4.4.3 Behaviour of FE3.32
4.4.4 Behaviour of FE4.34
4.5 Allocation of functional entities to physical equipment.34
4.6 Interworking considerations .34
5 Call handling.35
5.1 Functional model.35
5.1.1 Functional model description.35
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ETS 300 788: July 1997
5.1.2 Description of FEs . 35
5.2 Information flows . 35
5.2.1 Definition of information flows. 35
5.2.2 Examples of information flow sequences . 35
5.3 Functional entity actions.35
5.4 Functional entity behaviour. 35
5.5 Allocation of functional entities to physical equipment . 36
5.6 Interworking considerations . 36
History. 37
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Foreword
This European Telecommunication Standard (ETS) has been produced by the Digital Enhanced Cordless
Telecommunications (DECT) Project of the European Telecommunications Standards Institute (ETSI).
Transposition dates
Date of adoption: 20 June 1997
Date of latest announcement of this ETS (doa): 31 October 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30 April 1998
Date of withdrawal of any conflicting National Standard (dow): 30 April 1998
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1 Scope
This European Telecommunication Standard (ETS) defines the functional capabilities and information
flows for the scenarios where Global System for Mobile communications (GSM) basic services are
provided via the Digital Enhanced Cordless Telecommunications System (DECT) air interface for the case
that the DECT network elements are interconnected with the GSM Public Land Mobile Network (PLMN)
via Integrated Services Digital Network (ISDN) interfaces.
The general description of the service requirements are specified in ETS 300 787 [1].
The following core features are covered by this ETS:
- outgoing calls;
- emergency calls;
- incoming calls;
- location updating, location cancellation;
- IMSI attach/detach;
- TMSI reallocation procedure (temporary identity assign);
- IMSI authentication;
- ciphering;
- identity request.
Handover, which is another Mobility Management (MM) service, is outside the scope of this ETS.
The service is produced in three stages according to the method specified in
CCITT Recommendation I.130 [6]. Stage 2 identifies the Functional Entities (FEs) involved in the service
and the information flows between them. This ETS is specified according to the methodology specified in
CCITT Recommendation Q.65 [7].
The purpose of the stage 2 specification is to guide and constrain the work on signalling protocols at
stage 3, while fulfilling the requirements of stage 1. Stage 1 and stage 3 are defined in separate
standards.
This ETS distinguishes DECT access networks from the global network. The DECT access network
provides the point of attachment for the served user and ensures a transparent access to the GSM
services. The global network is the GSM PLMN or network of GSM PLMNs which provides the served
user with the global service specified in this ETS. The specification of information flows within the global
network (e.g. between Mobile Switching Centres (MSCs), Home Location Register (HLR) and Visitor
Location Register (VLR)) is beyond the scope of this ETS.
Furthermore, conformance to this ETS is met by conforming to the stage 3 standards which fulfil the
requirements of this ETS that are relevant to the equipment for which the stage 3 standard applies.
Therefore no method of testing is provided for this ETS.
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2 Normative references
This ETS incorporates, by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] ETS 300 787: "Digital Enhanced Cordless Telecommunications / Global System
for Mobile communications (DECT/GSM); DECT access to GSM via Integrated
Services Digital Network (ISDN); General description of service requirements".
[2] ETS 300 444: "Digital European Cordless Telecommunications (DECT); Generic
Access Profile (GAP)".
[3] ETS 300 370: "Digital Enhanced Cordless Telecommunications / Global System
for Mobile communications (DECT/GSM) inter-working profile; Access and
mapping (Protocol/procedure description for 3,1 kHz speech service)".
[4] ETS 300 557: "Digital cellular telecommunications system (Phase 2); Mobile radio
interface layer 3 specification (GSM 04.08)".
[5] ITU-T Recommendation Q.71 (1993): "ISDN circuit mode switched bearer
services".
[6] CCITT Recommendation I.130 (1988): "Method for the characterization of
telecommunication services supported by an ISDN and network capabilities of
an ISDN".
[7] CCITT Recommendation Q.65 (1988): "Stage 2 of the method for the
characterization of services supported by an ISDN".
[8] ETS 300 434-1: "Digital Enhanced Cordless Telecommunications (DECT) and
Integrated Services Digital Network (ISDN) interworking for end system
configuration; Part 1: Interworking specification".
[9] ITU-T Recommendation Z.100: "CCITT Specification and description language
(SDL)".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply:
DECT access network: Physical entity that contains all of the elements of a DECT Fixed Part (FP) and
that is attached to a GSM MSC.
NOTE 1: A DECT access network provides a transparent access to the services of the GSM
PLMN. This does however not exclude that it may in addition provide services and
switching capabilities to its own users.
DECT Fixed Part (FP): A physical grouping that contains all of the elements in the DECT network
between the local network and the DECT air interface.
NOTE 2: A DECT FP contains the logical elements of at least one fixed radio termination, plus
additional implementation specific elements.
DECT location area: The domain in which a DECT Portable Part (PP) may receive and/or make calls as
a result of a single location registration in the DECT access network.
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global network: The GSM PLMN or network of GSM PLMNs which provides the served user with the
global service specified in this ETS.
GSM location area: The domain in which a DECT PP may receive and/or make calls as a result of a
single location updating in the GSM network.
NOTE 3: A GSM location area may cover more than one DECT location area.
GSM service provider: An administration which offers global mobile telecommunication services to its
subscribers.
GSM services: Services which are offered to the subscriber/user by a GSM Service Provider and which
are defined by the appropriate GSM specifications.
location area: The domain in which a DECT PP may receive and/or make calls as a result of a single
location registration/updating in the network.
location registration: The process whereby the position of a PP is determined to the level of one location
area, and this position is updated in the network.
location updating: The process whereby the position of a PP is determined to the level of one location
area, and this position is updated in the network.
NOTE 4: DECT and GSM respectively use the terms location registration and location updating
for corresponding processes.
MSC area: The MSC area is the part of the network covered by a MSC. A MSC area may consist of one
or several GSM location areas. A MSC area may also consist of one or several BSC areas and/or one or
several DECT location areas.
network: The totality of GSM and DECT access network elements through which the GSM service
provider provides its services to the served user.
Public Land Mobile Network (PLMN): A PLMN is established and operated by an administration or for
the specific purpose of providing land mobile telecommunication services to the public. A PLMN may be
regarded as an extension of a network (e.g. ISDN); it is a collection of MSC areas within a common
numbering plan (e.g. same national destination code) and a common routeing plan. The MSCs are the
functional interfaces between the fixed networks and a PLMN for call set-up. Functionally the PLMNs may
be regarded as independent telecommunication entities even though different PLMNs may be
interconnected through the ISDN/PISN and PDNs for forwarding of calls or network information. A similar
type of interconnection may exist for the interaction between the MSCs of one PLMN.
served user: The user of a DECT PP who has a subscription with the GSM service provider. The DECT
PP accepts the GSM Subscriber Identity Module (SIM) and optionally the DECT DAM with a GSM
application.
NOTE 5: For the purpose of this ETS no distinction is made between the served user and its
associated DECT PP.
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3.2 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
CC Call Control (functional entity)
CCA Call Control Agent (functional entity)
DECT Digital Enhanced Cordless Telecommunications
FE Functional Entity
FP Fixed Part
GSM Global System for Mobile communications
HLR Home Location Register
IMEI International Mobile Equipment Identity
IMEISV IMEI Software Version number
IMSI International Mobile Subscriber Identity (GSM)
IPEI International Portable Equipment Identity
IPUI International Portable User Identity (DECT)
ISDN Integrated Services Digital Network
MM Mobility Management
MSC Mobile Switching Centre
PABX Private Automatic Branch Exchange
PDN Packet Data Network
PISN Private Integrated Services Network
PLMN Public Land Mobile Network
PP Portable Part
RAND Random number
RES A Response calculated by a PP
SDL Specification and Description Language
SIM Subscriber Identity Module
SRES A GSM specific authentication RES calculated by the GSM SIM or the DAM
TE Terminal Equipment
TMSI Temporary Mobile Subscriber Identity (GSM)
TPUI Temporary Portable User Identity
VLR Visitor Location Register
4 Mobility management features
4.1 Functional model
4.1.1 Functional model description
The functional model for the MM features shall be as shown in figure 1.
ra rb rc
FE1 FE2 FE3 FE4
Figure 1: Functional model for MM features
The FEs for the MM features shall be as follows:
FE1: Mobile user's MM agent;
FE2: Currently visited DECT access network MM control;
FE3: Global network MM control;
FE4: Previously visited DECT access network MM control.
The following functional relationships shall exist between these functional entities:
ra between FE1 and FE2;
rb between FE2 and FE3;
rc between FE3 and FE4.
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4.1.2 Description of functional entities
4.1.2.1 Mobile user's MM agent, FE1
This FE performs the user specific part of the MM features. It initiates and/or performs MM procedures on
behalf of the mobile user. FE1 is also responsible for passing information to the mobile user, if applicable.
4.1.2.2 Currently visited DECT access network MM control, FE2
FE2 performs the DECT access network specific part of the MM features at the current location of the
served user. If involvement of the global network is required, FE2 cooperates with FE3 in providing the
required feature.
FE2 receives information from FE1 when a MM procedure has been invoked. FE2 also can trigger FE1 to
perform actions for MM procedures initiated by the network (either by FE2 itself or on initiative of FE3).
NOTE: The possible information transfer within sub-entities in FE2 (e.g. when FE2 consists of
more than one DECT location area) is out of the scope of this ETS.
4.1.2.3 Global network MM control, FE3
FE3 performs the global network specific part of the MM features, i.e. the mobility actions which are of
global significance.
FE3 receives information from FE2 that a MM procedure has been invoked. FE3 also can trigger FE1/FE2
to perform actions for network initiated MM procedures.
NOTE: The possible information transfer within sub-entities in FE3 (e.g. between MSC's, HLR
and VLR) is out of the scope of this ETS.
4.1.2.4 Previously visited DECT access network MM control, FE4
FE4 performs the DECT access network specific part of the MM features at the previous location of the
served user. FE4 receives information from FE3 that a served user is no longer in the domain controlled
by FE4. On receipt of such information, FE4 will delete all temporary data stored for that user.
NOTE: The possible information transfer within sub-entities in FE4 (e.g. when FE4 consists of
more than one DECT location area) is out of the scope of this ETS.
4.1.3 Relationship of functional model to basic call functional model
The functional model for MM features is independent of the functional model for basic call.
4.2 Information flows
4.2.1 Definition of information flows
In the tables listing the elements in information flows, the column headed "Request" indicates which of
these elements are mandatory (M) and which are optional (O) in a request/indication information flow, and
the column headed "Confirm" (confirmed information flows only) indicates which of these elements are
mandatory (M) and which are optional (O) in a response/confirmation information flow.
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4.2.1.1 ra-detach
ra-detach is an unconfirmed information flow across ra from FE1 to FE2 to achieve a deactivation of the
user's terminal in the network.
Table 1: Contents of ra-detach
Service element Request Notes
Portable identity M - Contains the user's DECT identity.
- If "temporary identity" is not available, the only
allowed value of "portable identity" shall be of type
IPUI, with IPUI-type R, i.e. the IPUI shall
incorporate an IMSI.
- Other allowed values (of type TPUI, IPEI) may be
used in the non-DECT/GSM interworking case or
when "mobile identity" is also included.
Temporary identity O - Contains the user's GSM temporary identity.
- Allowed value is of type GSM TMSI.
- Shall be included if previously received from the
network before.
IPEI: International Portable Equipment Identity.
IPUI: International Portable User Identity.
TPUI: Temporary Portable User Identity.
TMSI: Temporary Mobile Subscriber Identity.
4.2.1.2 ra-identity-request
ra-identity-request is a confirmed information flow across ra between FE2 and FE1 which is used by FE2
to obtain one of the user's terminal identities.
Table 2: Contents of ra-identity-request
Service element Request Confirm Notes
Identity type M - - This service element indicates the
type of identity requested by the
network.
- For the scope of this ETS the only
values of relevance are the types
"Temporary identity (TMSI)", "user's
portable identity (IPUI)" and "portable
equipment identity (IPEI)".
Portable identity - O - Contains either the user's or the
equipment's DECT identity (i.e. IPUI
or IPEI).
- If the requested Identity type is
"User's portable identity", then this
service element shall include a value
of type IPUI with IPUI-type R, i.e.
shall include an IMSI.
- If the requested Identity type is
"Portable equipment identity", this
service element shall include an
IPEI-value.
Temporary identity - O - Contains the user's temporary GSM
identity, the TMSI.
- Shall be included if the requested
Identity type is "Temporary identity",
and if this identity is available.
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4.2.1.3 ra-location-registration
ra-location-registration is a confirmed information flow across ra between FE1 and FE2 which is used to
inform FE2 that the served user has roamed to another DECT location area or that a non-roaming served
user is now able to receive incoming calls.
Table 3: Contents of ra-location-registration
Service element Request Confirm Notes
Portable identity M - - Contains the user's DECT identity.
- Allowed value is of type IPUI, TPUI.
The IPUI-type shall be R, i.e. the IPUI
shall incorporate an IMSI.
Fixed identity O - DECT specific identity which is not of
relevance for DECT/GSM interworking
case, and therefore out of the scope of this
ETS.
Location area identity O M - Can contain the DECT location area
identity and the GSM location area
identity.
- In the "request/indication" this
element may include the previous
DECT location area. If available, also
the GSM location area identity shall
be included.
- In the "resp/conf" this element shall
include the current DECT location
area identity, and, if applicable and
available, also the GSM location area
identity.
Use TPUI - O To mandate the use of the temporary
identity.
Temporary identity O O - Contains the user's GSM temporary
identity, the GSM TMSI.
- This identity shall be included in the
"request/indication" if previously
received from the network.
- It shall be included in the "resp/conf"
if a new identity has been provided by
the global network.
Cipher key sequence number M - This parameter gives information to FE2 on
the ciphering key that is intended to be used
by FE1.
Terminal / setup capabilities O - May be needed to generate an IMEISV later
and model identifier on.
Result - M This takes the values "accepted" and
"rejected".
Cause of rejection - O - Only present if result is "rejected".
- At least the following values are
allowed: "user identity not known",
"served user not permitted to register
in the current location area", "served
user failed authentication", "location
registration temporarily not possible".
Duration - O If present this element defines for how long
at least the location registration and
temporary identity (if provided) are valid.
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4.2.1.4 ra-temporary-identity-assign
ra-temporary-identity-assign is a confirmed information flow across ra between FE2 and FE1 which is
used to assign or delete a temporary identity to/from the user's terminal.
Table 4: Contents of ra-temporary-identity-assign
Service Element Request Confirm Notes
Portable identity O - This service element is not relevant for the
DECT/GSM interworking case.
GSM location area identity M - Contains the GSM location area for which
the newly assigned temporary identity is
valid.
Temporary identity M - Contains the user's temporary GSM identity
(TMSI). For the DECT/GSM interworking
case, this element is mandatory.
Result - M Accepted or rejected.
Cause of rejection - O May be included if the result is "rejected".
4.2.1.5 ra-temporary-identity-result
ra-temporary-identity-result is an unconfirmed information flow across ra from FE1 to FE2 which is used to
confirm the allocation of a (new) temporary identity to the user's terminal as a result of a successful
location registration procedure.
Table 5: Contents of ra-temporary-identity-result
Service Element Request Notes
Result M Accepted or rejected.
Cause of rejection O May be included if the result is "rejected".
4.2.1.6 ra-authenticate
ra-authenticate is a confirmed information flow across ra between FE2 and FE1 which is used to
authenticate the mobile user.
Table 6: Contents of ra-authenticate
Service Element Request Confirm Notes
Authentication type M - Indicates "GSM authentication".
Random number (RAND) M - Contains a random number, which is used
for the calculation of the authentication
result (RAND).
Cipher key sequence number M - This number must be used by the terminal
for association with the calculated cipher
key, which results from the auth/ciphering
key generation algorithm.
Result - M Indicates whether the request for
authentication is accepted or rejected.
Authentication result O Included if the result is "accepted", contains
the calculated result of the authentication
(RES).
Cause of rejection - O May be included if Result is "rejected", and
indicates the reason why the authentication
request could not be accepted.
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4.2.1.7 ra-ciphering-setting
ra-ciphering-setting is a confirmed information flow across ra between FE2 and FE1 which is used to
establish ciphering for the radio link.
Table 7: Contents of ra-ciphering-setting
Service Element Request Confirm Notes
Cipher key sequence number M - Contains the number of the cipher key
whic
...
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