ETSI TR 101 176 V1.1.1 (1998-04)

Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobile communications (GSM); DECT/GSM advanced integration of DECT/GSM dual-mode terminal equipment

DTR/DECT-010096

Digitalne izboljšane brezvrvične telekomunikacije (DECT) - Globalni sistem mobilnih komunikacij (GSM) - Naprednejša integracija terminalov DECT/GSM z dvojnim delovanjem

General Information

• Status: Published
• Publication Date: 16-Apr-1998
• Technical Committee: DECT 1 - GSM interworking
• Current Stage: 12 - Completion
• Due Date: 31-Mar-1998
• Completion Date: 17-Apr-1998
• Ref Project: PSIST TR 101 176:2000 - Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobile communications (GSM); DECT/GSM advanced integration of DECT/GSM dual-mode terminal equipment

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); DECT/GSM advanced integration of DECT/GSM dual-mode terminal equipment33.070.50Globalni 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:TR 101 176 Version 1.1.1PSIST TR 101 176:2000en01-julij-2000PSIST TR 101 176:2000SLOVENSKI
STANDARD
European Telecommunications Standards Institute TR 101 176 V1.1.1 (1998-04)Technical ReportDigital Enhanced Cordless Telecommunications (DECT);Global System for Mobile communications (GSM);Advanced integration of DECT/GSMdual-mode terminal equipmentPSIST TR 101 176:2000

TR 101 176 V1.1.1 (1998-04)2ReferenceDTR/DECT-010096 (aw000ics.PDF)KeywordsDECT, GSM, network, radio, terminalETSI SecretariatPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: [phone]
Fax: [phone]Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/[e-mail]://www.etsi.frhttp://www.etsi.orgCopyright NotificationNo 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 1998.All rights reserved.PSIST TR 101 176:2000

TR 101 176 V1.1.1 (1998-04)3ContentsIntellectual Property Rights.5Foreword.5Introduction.51Scope.62References.63Definitions, symbols and abbreviations.83.1Definitions.83.2Abbreviations.94Reference configurations and scenarios.104.1Terminal Configurations.104.1.1Terminal states.104.1.1.1DECT Terminal states.104.1.1.2GSM Terminal states.124.2Specific terminal configurations.124.3Subscription configurations.134.4Network configurations.134.4.1GIP/GSM.134.4.2GAP/GSM.144.5Service scenarios.154.5.1Simultaneous speech calls.154.5.2speech + data.154.5.3speech/data + SMS.154.5.4speech/data + supplementary service transaction.165Double location registered terminals.165.1General on testing issues.165.2DMT of type 3 and 4.175.2.1Idle mode issues.175.2.1.1Missed pagings.175.2.1.2Automatic network selection.185.2.1.3Location registration.185.2.2Active mode issues.185.2.3Call forwarding for a one number service.195.2.4Principles for type approval of type 3 and 4 DMTs.195.3DMT of type 5.195.3.1Spectrum protection.195.3.1.1Intermodulation interference.195.3.1.2Adjacent channel interference.195.3.1.3Blocking requirements.205.3.2Protection of network.205.3.2.1Sensitivity.205.3.2.2Network selection.205.3.2.3Missed pagings.205.3.3Principles for type approval of type 5 DMTs.205.4Telephony requirements.215.5Handover between DECT and GSM.216GIP/GSM dual-mode operation based on a single subscription.226.1General.236.1.1Frequency bands of operation.236.1.2Backwards compatibility.236.1.3PLMN codes.246.1.4Other systems.24PSIST TR 101 176:2000

TR 101 176 V1.1.1 (1998-04)46.1.5Multiple service execution.246.1.6DMT type considerations.246.1.6.1DMS type 1.246.1.6.2DMS type 2.246.1.6.3DMS type 3.246.1.6.4DMS type 4.246.1.6.5DMS type 5.256.2Requirements.256.2.1User requirements.256.2.2Operator requirements.256.2.3DMT specific requirements.256.2.4Security requirements.256.3Functional description.256.3.1Idle mode procedures.256.3.1.1PLMN and Mode selection.266.3.1.2Cell selection.266.3.1.3Cell re-selection.266.3.1.4Location areas.276.3.2Connected mode procedures.276.3.2.1Monitoring.276.3.2.2Handover.276.3.3Frequency and power capabilities.276.4Technical realization and amendments.286.4.1Handover.286.4.2Identities.287Network selection for multi-subscription DMTs.288Conclusions.298.1Remarks on dual-mode terminal types 3, 4 and 5.298.1.1DMT Type 3.298.1.2DMT Type 4.298.1.3DMT Type 5.298.1.4Commonalities.298.2Acceptance of degradations.308.3Further standardization.308.4Testing and type approval.308.4.1Radio testing and type approval.308.4.1.1Type 3 DMTs.308.4.1.2Type 4 DMTs.318.4.1.3Type 5 DMTs.318.4.2Acoustic and telephony testing and type approval.328.4.3Protocol testing and type approval.328.4.3.1Type 3 DMTs.328.4.3.2Type 4 DMTs.328.4.3.3Type 5 DMTs.338.4.3.4DECT GIP/GSM DMTs.33Annex A:GIP/GSM external handover.34A.1Basic external intra-MSC handover procedure.35A.2DECT/GSM interworking profile external handover overview.36A.3GIP/GSM handover.36A.3.1GIP to GSM handover.37A.3.1.1Basic procedure - DMT type 2.37A.3.1.2Advanced procedure - DMT type 4 and 5.38A.3.2GSM to GIP handover.39History.40PSIST TR 101 176:2000

TR 101 176 V1.1.1 (1998-04)5Intellectual Property RightsIPRs essential or potentially essential to the present document may have been declared to ETSI. The informationpertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be foundin ETR 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect ofETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on the ETSIWeb server (http://www.etsi.fr/ipr or http://www.etsi.org/ipr).Pursuant to the ETSI Interim IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. Noguarantee can be given as to the existence of other IPRs not referenced in ETR 314 (or the updates on the ETSI Webserver) which are, or may be, or may become, essential to the present document.ForewordThis Technical Report (TR) has been produced by ETSI Project Digital Enhanced Cordless Telecommunications(DECT).IntroductionThe primary objective of the present document is to examine the advanced technical issues relating to dual-mode(combined DECT/GSM) terminals in order to provide a basis for future work in this area. The present documentproposes what could be standardized in order to establish type approval procedures for advanced dual-mode terminalsthat goes beyond the existing type approval procedures for DECT and GSM terminals.The main contents of this report is:· Radio, network and service aspects of dual-mode terminals that can be registered in two networks, and maybe bein active communication, at the same time via both DECT and GSM radio interfaces. Special focus is put on thereception of SMS in DECT mode and handover between DECT and GSM modes.· DECT/GSM dual-mode operation where the terminal connects to the same network (GSM PLMN) in both modesusing only a single subscription.PSIST TR 101 176:2000

TR 101 176 V1.1.1 (1998-04)61ScopeTo investigate radio and network aspects and clarifying the possibilities, problems and needs for new standardizationrelated to advanced dual-mode terminals for DECT and GSM. The present document will identify the needed contentsof the necessary standards that will form the basis for the second edition of Harmonized Standard EN 301 439 [18], i.e.dual-mode terminals that cannot be type approved according to existing TBRs and Harmonized Standards and that mayoperate in both modes at the same time or using only a single subscription. Basic dual-mode terminals, i.e. terminalsconsisting of one DECT part and one GSM part and that can be type approved according to existing TBRs andHarmonized Standards, were considered in another ETR (TR 101 072 [16]). The same consideration should be made fordual-mode terminals and infrastructure for DECT/DCS1800 as well as dual-mode/dual-band terminalsDECT/GSM/DCS1800. The term GSM is considered to cover all the frequency bands, and combinations of frequencybands, allowed for GSM type equipments, i.e. P-GSM, E-GSM, R-GSM, DCS1800 or dual-band GSM/DCS.NOTE:A terminal comprising multiple GSM parts operating on different frequency bands is considered as a dual-band terminal. A terminal comprising both DECT and GSM parts is referred to as a dual-mode terminal.2ReferencesReferences may be made to:a)specific versions of publications (identified by date of publication, edition number, version number, etc.), inwhich case, subsequent revisions to the referenced document do not apply; orb)all versions up to and including the identified version (identified by "up to and including" before the versionidentity); orc)all versions subsequent to and including the identified version (identified by "onwards" following the versionidentity); ord)publications without mention of a specific version, in which case the latest version applies.A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the samenumber.[1]EN 300 175-1: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 1: Overview".[2]EN 300 175-2: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 2: Physical layer (PHL)".[3]EN 300 175-3: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 3: Medium Access Control (MAC) layer".[4]EN 300 175-4: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 4: Data Link Control (DLC) layer".[5]EN 300 175-5: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 5: Network (NWK) layer".[6]EN 300 175-6: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 6: Identities and addressing".[7]EN 300 175-7: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 7: Security features".[8]EN 300 175-8: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 8: Speech coding and transmission".PSIST TR 101 176:2000

TR 101 176 V1.1.1 (1998-04)7[9]ETS 300 370: "Digital Enhanced Cordless Telecommunications / Global System for Mobilecommunications (DECT/GSM) inter-working profile; Access and mapping (Protocol/proceduredescription for 3,1 kHz speech service)".[10]ETR 341: "Digital Enhanced Cordless Telecommunications / Global System for Mobilecommunications (DECT/GSM) Interworking Profile (IWP); Profile overview".[11]ETS 300 787: "Digital Enhanced Cordless Telecommunications / Global System for Mobilecommunications (DECT/GSM); Integrated Services Digital Network; DECT access to GSM viaISDN; General description of service requirements".[12]EN 300 444: "Digital Enhanced Cordless Telecommunications (DECT); Generic Access Profile(GAP)".[13]ETS 300 824: "Digital Enhanced Cordless Telecommunications (DECT); Cordless TerminalMobility (CTM); CTM Access Profile (CAP)".[14]ETS 300 434-2: "Digital Enhanced Cordless Telecommunications (DECT); Integrated ServicesDigital Network (ISDN); DECT/ISDN interworking for end system configuration; Part 2: Accessprofile".[15]ETR 185: "Digital European Cordless Telecommunications (DECT); Data Services Profile (DSP);Profile overview".[16]TR 101 072: "Digital Enhanced Cordless Telecommunications/Global System for MobileCommunications (DECT/GSM); Integration based on dual-mode terminals".[17]EN 301 242: "Digital Enhanced Cordless Telecommunication (DECT); Global System for Mobilecommunications (GSM); DECT/GSM integration based on dual-mode terminals".[18]EN 301 439: "Digital European Cordless Telecommunications (DECT); Global System for Mobilecommunications (GSM); Attachment requirements for DECT/GSM Dual-Mode Terminal (DMT)equipment".[19]ETR 350: "Digital cellular telecommunications system (Phase 2+); Abbreviations and acronyms(GSM 01.04 version 5.0.1)".[20]GTS GSM 03.09: "Digital cellular telecommunications system (Phase 2+); Handover procedures(GSM 03.09 version 5.1.0)".[21]ETS 300 930: "Digital cellular telecommunications system (Phase 2+); Functions related to MobileStation (MS) in idle mode and group receive mode (GSM 03.22 version 5.2.1)".[22]ETR 366: "Digital cellular telecommunications system (Phase 2+); Multiband operation ofGSM/DCS 1800 by a single operator (GSM 03.26 version 5.1.0)".[23]ETS 300 940: "Digital cellular telecommunications system (Phase 2+); Mobile radio interface;Layer 3 specification (GSM 04.08 version 5.6.3)".[24]ETS 300 921: "Digital cellular telecommunications system; Service accessibility (GSM 02.11version 5.0.1)".[25]TBR 6: "Digital Enhanced Cordless Telecommunications (DECT); General terminal attachmentrequirements".[26]TBR 10: "Digital Enhanced Cordless Telecommunications (DECT); General terminal attachmentrequirements; Telephony applications".[27]TBR 19: "European digital cellular telecommunications system (Phase 2); Attachmentrequirements for Global System for Mobile communications (GSM) mobile stations; Access".[28]TBR 20: "European digital cellular telecommunications system (Phase 2); Attachmentrequirements for Global System for Mobile communications (GSM) mobile stations; Telephony".PSIST TR 101 176:2000

TR 101 176 V1.1.1 (1998-04)8[29]TBR 22: "Digital Enhanced Cordless Telecommunications (DECT); Attachment requirements forterminal equipment for DECT; Generic Access Profile (GAP) applications".[30]TBR 31: "Digital cellular telecommunications system (Phase 2); Attachment requirements formobile stations in the DCS 1 800 band and additional GSM 900 band; Access".[31]TBR 32: "Digital cellular telecommunications system (Phase 2); Attachment requirements formobile stations in the DCS 1 800 band and additional GSM 900 band; Telephony".[32]TBR 36: "Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobilecommunications (GSM); DECT access to GSM Public Land Mobile Network (PLMNs) for 3.1kHz speech applications".[33]EN 301 440: "Digital Enhanced Cordless Telecommunications (DECT); Integrated ServicesDigital Network (ISDN); Attachment requirements for terminal equipment for DECT/ISDNinterworking profile applications".3Definitions, symbols and abbreviations3.1DefinitionsFor the purposes of the present document, the following definitions apply:active communication: A state, where a communication link has been established between the DMT and a fixed part ineither GSM or DECT mode.NOTE 1:When the DMT is in active communication in a mode, it has left the idle state of that mode.active mode: GSM or DECT mode after being selected and switch on procedures for that mode being performed.NOTE 2:For GIP/GSM DMTs, registration is not performed in both modes.background scanning: The process whereby a basic DMT attempts to identify the existence of stable networks in themode other than the one it is in to which the terminal has access rights.basic dual-mode terminal: A DMT that can only be in one mode at the time and that can be switched either manuallyor automatically between modes. The basic DMT is always in one mode.cell (DECT): The domain served by a single antenna(e) system (including a leaky feeder) of one fixed part.NOTE 3:A cell may include more than one source of radiated Radio Frequency (RF) energy (i.e. more than oneradio end point).call (DECT): All of the layer 3 processes involved in one layer 3 peer-to-peer association.dual-band terminal: A terminal comprising multiple GSM parts operating on different frequency bands. For example aterminal comprising of GSM and DCS1800 parts.Dual-Mode Mobile Station (DMS): A GIP/GSM DMT that operates using only a GSM subscription.Dual-Mode Terminal (DMT): A terminal comprising both DECT and GSM parts.Fixed Part (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.GAP/GSM DMT: A dual-mode terminal where the DECT part is compliant with any DECT profile(s) except theDECT/GSM InterWorking Profile.GIP/GSM DMT: A dual-mode terminal where the DECT part is at least compliant with the DECT/GSM InterWorkingProfile.PSIST TR 101 176:2000

TR 101 176 V1.1.1 (1998-04)9GSM: In the present document, the GSM part of a DMT can be GSM 900, Digital Cellular System 1800 (DCS 1800) orGSM/DCS dual-band.GSM coverage: The sum of all GSM Public Land Mobile Network (PLMN) coverages where the DMT has at leastlimited service.mode selection: A DMT based procedure, whereby operating mode, GSM or DECT, is chosen.NOTE 4:Mode selection only applies for type 2 DMTs, type 3, 4, and 5 DMTs operate in both modes.mode: A basic DMT is in either of the two modes GSM and DECT. In GSM mode the DMT behaves as a GSM MobileStation (MS) and in DECT mode the DMT behaves as a DECT Portable Part (PP).NOTE 5:More advanced DMTs can be active in both modes. The grade of service available in the two modesdepend on the terminal type.Portable Part (PP) (DECT Portable Part): A physical grouping that contains all elements between the user and theDECT air interface. PP is a generic term that may describe one or several physical pieces.PLMN selection: A GSM procedure defined in [21] where the DMT identifies and selects the PLMN to which it mayregister.NOTE 6:For GIP/GSM DMTs, both radio interfaces may be involved in the PLMN selection.Radio Fixed Part (RFP): One physical sub-group of a fixed part that contains all the radio end points (one or more)that are connected to a single system of antennas.NOTE 7:Specific GSM abbreviations may be found in ETR 350 [19]. Specific DECT definitions and abbreviationsare found in EN 300 175-1 [1].3.2AbbreviationsFor the purposes of the present document, the following abbreviations apply:ARIAccess Rights IdentifierCAPCTM Access ProfileCTMCordless Terminal MobilityDAMDECT Authentication ModuleDECTDigital Enhanced Cordless TelecommunicationsDMSDual-Mode Mobile StationDMTDual-Mode TerminalETRETSI Technical ReportETSEuropean Telecommunication StandardETSIEuropean Telecommunications Standards InstituteFPFixed PartFTFixed TerminationGAPGeneric Access ProfileGIPDECT/GSM Interworking ProfileIMEIInternational Mobile Equipment IdentityIPEIInternational Portable Equipment IdentityIPUIInternational Portable User IdentityISDNIntegrated Services Digital NetworkLAILocal Area IdentifierLELocal ExchangeMMIMan Machine InterfaceMSCMobile Switching CentrePABXPrivate Automatic Bransch ExchangePBXPrivate Bransch ExchangePLMNPublic Land Mobile NetworkPPPortable PartPSTNPublic Switched Telephone NetworkPTPortable TerminationPSIST TR 101 176:2000

TR 101 176 V1.1.1 (1998-04)10RESRadio Equipment and SystemsRFPRadio Fixed PartSIMSubscriber Identity ModuleSMSShort Message ServiceTBRTechnical Basis for Regulation4Reference configurations and scenarios4.1Terminal ConfigurationsA Dual-Mode Terminal (DMT) for DECT and GSM is considered to be a terminal with one GSM part and one DECTpart that is controlled by a common Interworking Unit which also controls one common MMI (keypad, display andmenu functions). A reference configuration for dual-mode terminals is shown in figure 1.InterworkingMMIDECTGSMFigure 1: Reference configuration for DMTSome parts in the terminal, such as microphone and loudspeaker, could be reused by both the GSM and DECT parts orcould be implemented in two ways. Integration of the RF parts is also foreseen. The exact functionality of theinterworking function will depend on the terminal configuration.4.1.1Terminal statesA DMT can operate in two modes: DECT and/or GSM. In each mode the terminal can be in different states ofoperations at a lower layer (MAC layer for DECT and RR layer for GSM).4.1.1.1DECT Terminal statesThe DECT mode of a DMT behaves as a DECT Portable Part (PP). A PP can exist in one of the following MAC layerstates (see EN 300 175-3 [3], subclause 4.3.1).1)Active_Locked: where the PP is synchronized to at least one RFP transmission and has one or more connectionsin progress.2)Idle_Locked: where the PP is synchronized to at least one RFP transmission. It is able to make or receiveconnections, but has no connections in progress.3)Active_Unlocked: where the PP is not synchronized to any RFP transmissions, and is unable to make or receiveconnections. The PP makes occasional attempts to detect a suitable RFP and enter the Idle_Locked state.4)Idle_Unlocked: the PP is not synchronized to any RFP and does not attempt to detect RFPs.PSIST TR 101 176:2000

TR 101 176 V1.1.1 (1998-04)11
IdleLocked
ActiveUnlocked
IdleUnlocked ActiveLocked"switch off""switch on"no suitableRFPfoundsuitableRFPfirst bearerestablishedlast bearerreleased Figure 2: DECT mode state diagram (see EN 300 175-3 [3])The DECT idle unlocked state corresponds to the GSM idle state.NOTE:Compared to the GSM case, a DECT PP can go to the switched off state via the active state (e.g. in theGIP and CAP cases) but also directly from the idle state (as e.g. in the GAP case).PSIST TR 101 176:2000

TR 101 176 V1.1.1 (1998-04)124.1.1.2GSM Terminal statesA switched on DMT in GSM mode can be in either idle state or active state at the RR layer [23]:Switched offSwitched offSwitched onIdleActiveRR releaseRR immediateassignment1)Idle state: where the MS is switched on and is in GSM idle mode but is not in active communication.2)Active state: where the MS has initiated an RR immediate assignment and left the idle state.NOTE:The idle state here should not be mixed with the idle mode. In GSM idle mode, the following steps arecovered that corresponds to the DECT finding of suitable RFP: PLMN selection , Cell selection/re-selection (identification of suitable, or any, cell), Camping (tuning to the BCCH of the selected cell) andLocation registration (for those services that requests registration).Figure 3: GSM mode state diagram (based on the description in ETS 300 940 [23])4.2Specific terminal configurationsFive general terminal configurations have been identified in TR 101 072 [16]. These are denoted types 1-5. The type 3terminal where subdivided into type 3a and type 3b. The different terminal types are described in the followingsubclauses.Table 1: Summary of terminal typesNumberDescriptiontype 1single active mode - manual switchtype 2single active mode - automatic scan (manual or automatic switch)type 3dual idle mode (double registration, listen in both modes)type 3asimultaneous receive (two transceivers)type 3btime multiplexed receive (one transceiver)type 4single transmit - dual receive (listen to one radio interface even whenactive on the other)type 5dual active mode (simultaneous transmit/receive in both modes)Terminal types 1 and 2 where analysed in TR 101 072 [16] and the basis for automatic background scanning andautomatic switching between modes (type 2 DMTs) where given in EN 301 242 [17]. The present document covers theterminal types 3-5 and develops further on single-subscription type 2 DMTs.PSIST TR 101 176:2000

TR 101 176 V1.1.1 (1998-04)134.3Subscription configurationsA dual-mode terminal may contain different subscriptions related to each radio interface or could have a singlesubscription which could be used in both the DECT and the GSM air interface. The same subscription configurations asfor basic DMTs applies here. Two different types must be distinguished in the context of advanced dual-mode terminals:-single subscription operation where the GSM identity is used to access GSM service also in DECT mode (i.e. theDECT part is GIP compliant);-multiple subscription operation where the DECT part uses other DECT profile(s) than GIP and at least oneDECT subscription in addition to the GSM subscription. (This type of operation also covers the theoreticalpossibility to use the IPUI-R, containing the IMSI, to connect to other telephony networks than GSM PLMNusing another DECT profile than GIP. It also covers the case were both GIP and other DECT profiles are used inthe DECT part).NOTE:Since the GIP is GAP compatible, a GIP portable (and a GIP/GSM DMT) may use both a DECT and aGSM identity depending on which it operates according to (i.e. depending in which environment it isactive).A DMT where the DECT part is compliant with at least the DECT/GSM Interworking Profile is sometimes called aGIP/GSM DMT while DMTs based on other DECT profiles than GIP sometimes are generically called GAP/GSMDMTs. A GIP/GSM DMT that operates only on a single subscription (the GSM subscription), i.e. the DECT part isbased only on GIP, will be called a Dual-Mode Mobile Station (DMS).Basic dual-mode terminals were considered in EN 301 242 [17] for the cases where the DECT part is compliant with theGeneric Access Profile, EN 300 444 [12], the CTM Access Profile, ETS 300 824 [13] or the ISDN Access Profile,ETS 300 434-2 [14]. The present document elaborates further on the single subscription operation of types 2-5 DMTswhere the DECT part is compliant with the DECT/GSM Interworking Profile, ETR 341 [10] and on multiplesubscription operation of DMTs based on types 3-5 DMTs where the DECT part is compliant with other DECT profilesthan GIP (possibly in addition to GIP in which case also type 2 DMTs are covered).4.4Network configurations4.4.1GIP/GSMFor the first phase of dual-mode standardization (see TR 101 072 [16]), it was assumed that the portable supports atleast basic speech services. For the GIP/GSM case, the connection between DECT access network and PLMN networkcould be either via an A interface, ETS 300 370 [9] or via an ISDN interface, ETS 300 787 [11].Support of other (non basic-speech) GSM services is considered in this report. Clearly when additional services areadded they must be supported within the networks. Currently support for SMS and other GSM services is only definedfor the A interface. Plans exist for implementing support for all GSM services also on the ISDN interface.Plans for enhancements of the DECT/GSM Interworking Profile with respects to enhanced bearer services andinterworking to GSM phase 2+ services HSCSD and GPRS exists.PSIST TR 101 176:2000

TR 101 176 V1.1.1 (1998-04)14GPRSGSMADSS1+GbGSMBSSGIPFPDECTFPDECTFPGSMBSSGSMMSCGPRSSGSNDMTDMTGSMph 2basicspeechGSMph 2+Figure 4: Some examples of network configurations related to GIP/GSM dual-mode terminals4.4.2GAP/GSMFor the cases where the DECT part of the DMT is not using GIP, several network configurations can be identified, e.g.:-a DECT FP in a private system can be connected to both the PABX and data network, e.g. a LAN;-a residential DECT FP can be connected to a local exchange in the public network;-a DECT FP can be connected to both private and public CTM networks.LEDMTspeechDMTPABXLANLEPINXDMTGSMMSCCAPFPCTMph 2GSMBSSGAP/IAPFPGAP/DSPFPspeech& dataGSMph 2+Figure 5: Some examples of network configurations related to GAP/GSM dual-mode terminalsPSIST TR 101 176:2000

TR 101 176 V1.1.1 (1998-04)154.5Service scenariosIn addition to the service scenarios identified for basic dual-mode terminals (see TR 101 072 [16]), i.e. speech serviceon both GSM and DECT radio interfaces, the examples in this subclause are relevant for advanced GAP/GSM DMTs.NOTE:The service scenario for GIP/GSM DMTs is covered mainly in clause 6.Two main applications are identified for double location registered terminals:-to be reachable on both fixed and mobile telephone numbers at the same time;-multiple service execution (e.g. simultaneous speech and data).4.5.1Simultaneous speech callsFor example, while in the office, the DMT is simultaneously registered via a GSM radio interface to a GSM PLMN andvia a DECT radio interface to an Access Rights Identifier (ARI) B network. In the home environment the scenario is thesame and DMT is registered in both a GSM PLMN and an ARI A RFP. The DMT is simultaneously reachable on boththe PSTN and the GSM numbers.A type 3 or 4 DMT will be active in a call only on one radio interface at the time. It listens for incoming calls on bothradio interfaces but can only answer one at the time.A type 5 DMT can be active in calls on both radio interfaces at the same time. Support of a conference call involvingboth modes may not be possible but a terminal based call completion (call waiting/call hold) feature would be possibleand could have the same user interface as the corresponding network based services.4.5.2speech + dataWhen active in data call in one mode, a double location registered DMT of type 4 or 5 could be reachable also forincoming speech calls in the other mode.A type 5 DMT could be considered to operate a data call on one radio interface and one speech call on the other radiointerface. It is believed that the data call would then most likely be on the DECT link. The DECT part of the DMTwould then have to support one DECT data profile [15] in addition to GAP. In the future there may even be multi modeterminals optimized for data services that only supports a data profile on the DECT part.DECT data profiles and DECT/GSM specific enhanced bearer services may also be considered to be implemented intype 1-3 DMTs but for these type there are no aspects of simultaneous service execution to consider.4.5.3speech/data + SMSDouble location registered DMTs (i.e type 3-5) are able to send and receive SMS over both radio interfaces in the sameway as they are able to initiate and receive speech and data calls over both radio interfaces. (For the DECT part the SMScapability depends on which profile the DECT part is based on.) Only a DMT type 5 is able to handle SMS PTP in onemode while being in active communication in the other mode. The delivery of an SMS to type 3 and 4 DMTs would bedelayed in one mode until the communication in the other mode is completed. A type 4 DMT can receive SMS CB inone mode even when it is in active communication in the other mode.Table 2:SMS capability in one mode of a double location registered DMT depending on activity in theother modeActivity in the other modeDMT typeidleactivetype 3yesnotype 4yesCB onlytype 5yesyesFor GAP/GSM DMTs used for single number applications there is a need for the user to always receive GSM shortmessages. Since DECT access networks cannot necessarily deliver SMSs, the only way to guarantee that SMSs arePSIST TR 101 176:2000

TR 101 176 V1.1.1 (1998-04)16delivered to the DMT is that the DMT can receive a SMS over the GSM radio interface even when the DMTs is lockedto a DECT system. A DMT type 5 meets this requirement. A type 3 or 4 DMT is probably sufficient from the userspoint of view since it would receive an incoming SMS rather soon after a DECT call is completed.NOTE:Repetition of paging for SMS is network dependent.In case the continuous SMS reception is to implemented without having the missed pagings problem of type 3 and 4DMT, a few options exist:1)a type 2 DMT could be set to change mode regularly to check for eventual incoming SMS. E.g. the DMT couldleave DECT mode once every 15 minutes and go into GSM mode for a minute or so and then go back into DECTmode. This behaviour would not make more harm to networks than what is already allowed for type 2 DMTs (seeEN 301 242 [17]);2)a type 3 DMT could be set to be reachable only for GSM SMS when in DECT coverage. It would then bereachable for incoming telephone calls only from one system at the time in the same way as a type 2 DMT. Whenin GSM mode and a DECT scanning has identified a suitable DECT network, the DMT would activate the CallForwarding Unconditional SS (for all services but SMS) and lock to the DECT system. When leaving the DECTcoverage the DMT would just deactivate the CFU service.4.5.4speech/data + supplementary service transactionDMTs that are registered in two networks simultaneously (i.e. types 3-5), could be expected to perform a supplementaryservice transaction, or other signalling, in one mode even when being active in a call (speech or data) in the other mode.Only a type 5 DMT can meet this requirement. Type 3 and 4 DMTs would fail to do this in the same way as they wouldfail to receive a second incoming call.5Double location registered terminalsType 3, 4 and 5 DMTs are here analysed in the same way as type 1 and 2 DMTs were in TR 101 072 [16].As a terminal of type 3, 4 and 5 can be simultaneously registered in both systems, the GSM and DECT specificationsshoul
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