ETSI TR 101 072 V1.1.1 (1997-06)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.'(&7*60Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobile communications (GSM); DECT/GSM integration based on dual-mode terminals33.070.30'(&7Digital Enhanced Cordless Telecommunications (DECT)ICS:Ta slovenski standard je istoveten z:TR 101 072 Version 1.1.1PSIST TR 101 072:2000en01-julij-2000PSIST TR 101 072:2000SLOVENSKI
STANDARD
TR 101 072 V1.1.1 (1997-06)Technical ReportDigital Enhanced Cordless Telecommunications/Global System for Mobile Communications (DECT/GSM);Integration based on dual-mode terminalsPSIST TR 101 072:2000

TR 101 072 V1.1.1 (1997-06)2ReferenceDTR/DECT-010095 (9xc00ics.PDF)KeywordsDECT, GSM, dual mode, terminal, radio, networkETSI SecretariatPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/88X.400c= fr; a=atlas; p=etsi; s=secretariatInternetsecretariat@etsi.frhttp://www.etsi.frCopyright 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 1997.All rights reserved.PSIST TR 101 072:2000

TR 101 072 V1.1.1 (1997-06)3ContentsIntellectual Property Rights.5Foreword.5Introduction.51Scope.62References.63Abbreviations and definitions.83.1Abbreviations.83.2Definitions.93.3GSM abbreviations and definitions.104Terminology used in this document.104.1Distinguishing access technology from network type.115Reference configurations and scenarios.115.1Terminal configurations.115.2Specific terminal configurations.125.2.1The terminal can only be location registered through one air interface - manual switch - type 1.125.2.2The terminal can only be location registered through one air interface - automatic scan - type 2.125.2.3The terminal can be location registered through both air interfaces - type 3.135.2.4The terminal can be location registered through both air interfaces but can be in activecommunication on only one - type 4.135.2.5The terminal can be in active communication on both air interfaces at the same time - type 5.135.3Subscription configurations.135.3.1Multiple subscriptions.135.3.2Subscriptions scenarios.145.3.2.1GAP/GSM.145.3.2.2GIP/GSM.155.4Network configurations.155.4.1Manual change of network.165.4.2Automatic change of network.165.5Service scenarios.165.5.1Residential/GSM.175.5.2Business/GSM.175.5.3Public/GSM.175.5.4Enhanced GSM.175.5.5One-number services.176Spectrum protection and testing issues.186.1Test philosophy.186.1.1Type 1 terminal.186.1.2Type 2 terminal.186.2Analysis of the requirements.186.2.1Emission due to modulation.186.2.2Emission due to transmitter transient.196.2.3Emission due to intermodulation.196.2.4Spurious emission when allocated a transmit channel.196.2.5Spurious emission when not allocated a transmit channel.196.3Conclusions for the radio requirements, protection of spectrum.207Protection of the network.207.1Considerations regarding different DMT types.207.1.1Type 1 DMT.207.1.2Type 2 DMT.217.2Identified problems.217.2.1Idle mode issues.21PSIST TR 101 072:2000

TR 101 072 V1.1.1 (1997-06)47.2.2Missed pagings.227.2.3Uncontrolled automatic network selection.227.2.4Call forwarding problems for a one number service.238Protocol interworking requirements.238.1Mapping of terminal equipment identities - International Portable Equipment Identity/InternationalMobile Equipment Identity (IPEI/IMEI).238.2Air interface protocol.238.3External handover between air interfaces.238.4Subscriber Identity Module / DECT Authentication Module (SIM/DAM) card issues.248.5Emergency call requirements.249Telephony requirements.249.1Testing philosophy.249.2Comparison between GSM and DECT requirements.2410Principles for type approval of DMTs.26Annex A:GSM micro-cellular architectures.27Annex B:Basic differences between GIP, GAP, CAP and IAP.28B.1The GIP.28B.2The GAP.28B.3The CAP.29B.4The ISDN access profile.29History.30PSIST TR 101 072:2000

TR 101 072 V1.1.1 (1997-06)5Intellectual Property RightsETSI has not been informed of the existence of any Intellectual Property Right (IPR) which could be, or could becomeessential to the present document. However, pursuant to the ETSI Interim IPR Policy, no investigation, including IPRsearches, has been carried out. No guarantee can be given as to the existence of any IPRs which are, or may be, or maybecome, essential to the present document.ForewordThis Technical Report (TR) has been produced by ETSI Project Digital Enhanced Cordless Telecommunications(DECT).IntroductionThe primary objective of this document is to examine the technical issues relating to dual mode (combined DigitalEnhanced Cordless Telecommunications/Global System for Mobile communications (DECT/GSM)) terminals in orderto guide future work in this area.The substantive clauses of this document are as follows:Clause 5 examines the various configurations and scenarios foreseen for Dual Mode Terminals (DMTs). The followingaspects are considered:-the constraints resulting from the radio system architecture employed;-the different combinations of subscription types that may be used;-the possible network configurations which may be used to support a dual mode service;-the different service packages that an operator may provide to its customers.Clauses 6, 7, 8 and 9 attempt to identify the technical areas that has to be addressed by the TBR for DMTs.Clause 6 addresses the requirements for protection of the spectrum.Clause 7 addresses the requirements for protection of the network.Clause 8 examines general protocol issues which need consideration in order to ensure interoperability.Clause 9 considers the telephony requirements which have to be met.Clause 10 concludes on type approval aspects basic DMTs.PSIST TR 101 072:2000

TR 101 072 V1.1.1 (1997-06)61ScopeTo investigate radio and network aspects and clarifying the possibilities as well as the problems related to dual-modeterminals. This document focuses on possible early implementations and will form the basis for the first edition ofTBR 39 [28] in the sense that it identifies how basic Dual Mode Terminals (DMTs) can be type approved using existingTBRs. For Global System for Mobile communications (GSM), both phase 1 and phase 2 specifications are considered.Basic DMTs are considered to comprise of both Digital Enhanced Cordless Telecommunications (DECT) and GSMparts of which only one at the time is to be active. Advanced dual-mode terminals, where the DECT and GSM parts arefurther integrated or where the DECT and GSM parts can be active at the same time, will be considered inDTR/DECT-010096 [35].The same considerations apply for dual-mode DECT/DCS1800 terminals and for DECT/GSM/DCS1800 dualmode/dual band terminals. The term GSM is considered to cover all the frequency bands, and combinations offrequency bands allowed for GSM type equipment, 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 dualband terminal. A terminal comprising both DECT and GSM parts is referred to as a DMT. A dualmode/dual band terminal is a terminal comprising a DECT part and a GSM/DCS1800 dual band part.This document states the assumptions to be made for the first edition of TBR 39 [28] and attempts to identify if furtherdual mode standardization is needed.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]ETS 300 175-1: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface(CI); Part 1: Overview".[2]ETS 300 175-2: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface(CI); Part 2: Physical layer (PHL)".[3]ETS 300 175-3: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface(CI); Part 3: Medium Access Control (MAC) layer".[4]ETS 300 175-4: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface(CI); Part 4: Data Link Control (DLC) layer".[5]ETS 300 175-5: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface(CI); Part 5: Network (NWK) layer".[6]ETS 300 175-6: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface(CI); Part 6: Identities and addressing".[7]ETS 300 175-7: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface(CI); Part 7: Security features".PSIST TR 101 072:2000

TR 101 072 V1.1.1 (1997-06)7[8]ETS 300 175-8: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface(CI); Part 8: Speech coding and transmission".[9]ETS 300 085 (1990): "Integrated Services Digital Network (ISDN); 3,1 kHz telephony teleserviceAttachment requirements for handset terminals" (Candidate NET 33).[10]ETS 300 370: "Radio Equipment and Systems (RES); Digital Enhanced CordlessTelecommunications / Global System for Mobile communications (DECT/GSM) inter-workingprofile; Access and mapping (Protocol/procedure description for 3,1 kHz speech service)".[11]ETS 300 434-2: "Digital Enhanced Cordless Telecommunications (DECT) and Integrated ServicesDigital Network (ISDN) interworking for end system configuration; Part 2: Access profile".[12]ETS 300 444: "Digital European Cordless Telecommunications (DECT); Generic Access Profile(GAP)".[13]ETS 300 535: "Digital cellular telecommunications system (Phase 2); Functions related to MobileStation (MS) in idle mode (GSM 03.22)".[14]GSM TS 03.50: "European digital cellular telecommunications system (Phase 1); TransmissionPlanning Aspects of the Speech Service in the GSM PLMN System".[15]ETS 300 540: "Digital cellular telecommunications system (Phase 2); Transmission planningaspects of the speech service in the GSM Public Land Mobile Network (PLMN) system(GSM 03.50)".[16]ETS 300 577: "Digital cellular telecommunications system (Phase 2); Radio transmission andreception (GSM 05.05)".[17]GSM TS 11.10: "European digital cellular telecommunications system (Phase 1); Mobile StationConformity Specification".[18]ETS 300 607: "Digital cellular telecommunication system (Phase 2); Mobile Station (MS)conformance specification; (GSM 11.10)".[19]ETS 300 824: "Digital Enhanced Cordless Telecommunications (DECT); Cordless TerminalMobility (CTM); CTM Access Profile (CAP)".[20]TBR 5: "European digital cellular telecommunications system; Attachment requirements forGlobal System for Mobile communications (GSM) mobile stations; Access".[21]TBR 6: "Digital Enhanced Cordless Telecommunications (DECT); General terminal attachmentrequirements".[22]TBR 9: "European digital cellular telecommunications system; Attachment requirements forGlobal System for Mobile communications (GSM) mobile stations; Telephony".[23]TBR 10: "Digital Enhanced Cordless Telecommunications (DECT); General terminal attachmentrequirements; Telephony applications".[24]TBR 19: "European digital cellular telecommunications system (Phase 2); Attachmentrequirements for Global System for Mobile communications (GSM) mobile stations; Access".[25]TBR 20: "European digital cellular telecommunications system (Phase 2); Attachmentrequirements for Global System for Mobile communications (GSM) mobile stations; Telephony".[26]TBR 22: "Attachment requirements for terminal equipment for Digital Enhanced CordlessTelecommunications (DECT) Generic Access Profile (GAP) applications".[27]TBR 31: "Digital cellular telecommunications system (Phase 2); Attachment requirements formobile stations in the DCS 1 800 band and additional GSM 900 band; Access".PSIST TR 101 072:2000

TR 101 072 V1.1.1 (1997-06)8[28]TBR 39:"Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobilecommunications (GSM); DECT/GSM dual-mode terminals".NOTE:TBR 39 will be produced in 2 editions, edition 1 will cover terminal type 2 (and may include terminaltype 1), and edition 2 will include terminal types 3, 4 and 5.[29]ETR 100: "European digital cellular telecommunications system (Phase 2); Abbreviations andacronyms (GSM 01.04)".[30]ETR 159: "Digital European Cordless Telecommunications (DECT); Wide area mobility using theGlobal System for Mobile communications (GSM)".[31]ETR 246: "Digital European Cordless Telecommunications (DECT); Application of DECTWireless Relay Station (WRS)".[32]ETR 308: "Digital Enhanced Cordless Telecommunications (DECT); Services, facilities andconfigurations for DECT in the local loop".[33]ETR 310: "Digital Enhanced Cordless Telecommunications (DECT); Traffic capacity andspectrum requirements for multi-system and multi-service DECT applications co-existing in acommon frequency band".[34]ETR 341: "Digital Enhanced Cordless Telecommunications / Global System for Mobilecommunications (DECT/GSM) interworking profile; Profile overview".[35]DTR/DECT-010096: "Digital Enhanced Cordless Telecommunications (DECT); Global Systemfor Mobile communications (GSM); DECT/GSM advanced integration of dual-mode terminals".[36]89/336/EEC: "Council Directive of 3 May 1989 on the approximation of laws of the MemberStates relating to Electromagnetic Compatibility (Official Journal L139 of 23/5/89)".[37]91/263/EEC: "Council Directive of 29 April 1991 on the approximation of the laws of the MemberStates concerning telecommunications terminal equipment, including the mutual recognition oftheir conformity" (Terminal Directive).[38]CCITT Recommendation P.79 (1989): "Calculation of loudness ratings for telephone sets".3Abbreviations and definitions3.1AbbreviationsFor the purposes of the present document, the following abbreviations apply:ADPCMAdaptive Differential Pulse Code ModulationARIAccess Rights IdentifierBSSBase Station SystemCAPCTM Access ProfileCTMCordless Terminal MobilityDAMDECT Authentication ModuleDECTDigital Enhanced Cordless TelecommunicationsDMTDual Mode TerminalDFSDECT Fixed SystemDPSDECT Portable SystemFPFixed PartFTFixed radio TerminationGAPGeneric Access ProfileGIPDECT/GSM Interworking ProfileGSMGlobal System for Mobile communicationsIAPISDN Access ProfileIMEIInternational Mobile Equipment IdentityPSIST TR 101 072:2000

TR 101 072 V1.1.1 (1997-06)9IPEIInternational Portable Equipment IdentityISDNIntegrated Services Digital NetworkLAILocal Area IdentifierLELocal ExchangeLSTRListener Sidetone RatioMMMobility ManagementMMIMan-Machine InterfaceMSCMobile Switching CentreNTPNetwork Termination PointPABXPrivate Automatic Branch ExchangePLMNPublic Land Mobile NetworkPPPortable PartPTPortable radio TerminationRFPRadio Fixed PartSIMSubscriber Identity ModuleSMSShort Message ServiceWAMWide Area MobilityWRSWireless Relay Station3.2DefinitionsFor the purposes of the present document, the following abbreviations apply:authentication (user): The process whereby a DECT subscriber is positively verified to be a legitimate user of aparticular Fixed Part (FP).NOTE 1:Authentication is generally performed at call set-up, but may also be done at any other time (e.g. during acall).call: All of the NWK layer processes involved in one network layer peer-to-peer association.NOTE 2:Call may sometimes be used to refer to processes of all layers, since lower layer processes are implicitlyrequired.cell: The domain served by a single antenna(e) system (including a leaky feeder) of one FP.NOTE 3:A cell may include more than one source of radiated Radio Frequency (RF) energy (i.e. more than oneradio end point).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 Terminal (DMT): A terminal comprising both DECT and GSM parts.dual mode/dual band terminal: A terminal comprising both DECT and multiple GSM parts operating on differentfrequency bands. It is considered as a terminal comprising both DECT and dual band (e.g. GSM/DCS1800) 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.location registration: The process by which the terminal informs the network of its presence within a particularlocation area.Network Termination Point (NTP): Is the point that defines the border between the equipment provided by thenetwork operator and the customer premises equipment.Portable Part (DECT Portable Part) (PP): 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.Radio Fixed Part (RFP): One physical sub-group of a FP that contains all the radio end points (one or more) that areconnected to a single system of antennas.PSIST TR 101 072:2000

TR 101 072 V1.1.1 (1997-06)10subscription registration: The infrequent process whereby a subscriber obtains access rights to one or more FPs.NOTE 4:Subscription registration is usually required before a user can make or receive calls.subscription load/modify: A procedure of loading subscription registration data in a PP or CTA in real-time over theair interface.Wireless Relay Station (WRS): a physical grouping that combines elements of both Portable radio Terminations (PTs)and Fixed radio Terminations (FTs) to relay information on a physical channel from one DECT termination to a physicalchannel to another DECT termination.NOTE 5:The DECT termination can be a PT or an FT or another WRS.3.3GSM abbreviations and definitionsDefinition and specific GSM abbreviations may be found in ETR 100 [29].4Terminology used in this documentDECT and GSM standards often use different terminology for equivalent functions. Since this document will be read byboth experts in GSM and experts in DECT, this clause tries to clarify some of the vocabulary used. Similar DECT andGSM definitions are not necessarily strictly equivalent, it has been chosen sometimes to use general formulations. If dualmode standards are to be produced, a common terminology needs to be defined.Exact GSM terminology can be found in GSM 03.22 (ETS 300 535 [13]). The DECT terminology can be found in theDECT CI specifications (ETS 300 175, parts 1 to 8 [1] - [8]).Table 1: Comparison of DECT and GSM terminology as used with respect to DMTsDECT termGSM termExplanationPPMobile stationThe combination of mobile termination equipment, subscription identityequipment and any required terminal equipment.Often through this document the word "terminal" is used for those terms.RFPBase stationThe physical equipment providing the elementary part of coverage.The word "cell" is not used in DECT, but often through this document theword "cell" is used for the coverage area of a RFP/base station.Active unlockedscanNetwork searchThe process by which a terminal scans all possible frequencies foravailable networks (Public Land Mobile Networks (PLMNs) in GSM).Often through this document the word "scanning" is used for those terms.Network selectionThe process by which a terminal chooses a network.In GSM a Mobile Station manually or automatically chooses a network(PLMN in GSM) from a list of those detected during Network search.In DECT this process is implementation dependant and uses the activeunlocked scan.Often through this document the words "network selection".Location areaLocation areaA group of cells all of whose broadcast location identities are the same.Location registrationLocation updateThe process by which the terminal informs the network of its presencewithin a particular location area.Both terms are used through the document.Attach/DetachAttach/detachAttach is the process whereby a terminal within coverage area of a systemto which it has access rights, notifies the system that it is operative.The reverse process is detach, which reports the terminal as inoperative(note).Idle lockedIdle modeThe state a terminal is in when it is operational but is not in any transactionwith the network (call, location update, etc.).Active lockedDedicated modeThe state a terminal is in when it has started a transaction with the network.NOTE:There is no procedure over the air interface for detach indication in Generic Access Profile (GAP).PSIST TR 101 072:2000

TR 101 072 V1.1.1 (1997-06)114.1Distinguishing access technology from network typeThe intention of this subclause is to clearly distinguish between the air interface used and the core network providingmobility.The word DECT is used to refer to the DECT air interface or the access network related to the DECT air interface.The word GSM is used to refer to the GSM or DCS1800 air interface and the related access network.The term Access Rights Identifier (ARI) A/B/C is used to refer to a network subscription that can be accessed using theDECT air interface only. It is also used to refer to a system or network requiring only basic GAP protocols or a closelyrelated protocol such as the Cordless Terminal Mobility (CTM) Access Profile (CAP). An ARI A/B/C subscriptioncannot be used to access a PLMN.NOTE 1:The ARI is used by the PT to determine if it has permission to access a FT. Types A, B, C are intended forresidential, business and public access applications respectively. ARI D is specifically intended to be usedin conjunction with DECT/GSM interworking applications.NOTE 2:An ARI A/B/C system or network could be a single FT where the network connection to the FP does notsupport mobility.The word PLMN is used to refer to a network subscription that can be accessed using the GSM air interface. Thesubscription can also be accessed via a DECT air interface by a DMT supporting DECT/GSM Interworking Profile(GIP) protocols (a GIP/GSM DMT) i.e. a PLMN subscription is synonymous with an ARI D subscription. References toa PLMN network have the conventional meaning, but may exclude the air interface access parts.5Reference configurations and scenarios5.1Terminal configurationsA DMT for DECT and GSM is considered to be a terminal with one GSM part and one DECT part that is controlled bya common Interworking Unit which also controls one common MMI (keypad, display and menu functions). A referenceconfiguration for DMTs is shown in figure 1.DECTGSMInterworkingMMIMMI:Man-Machine InterfaceFigure 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.Several possible hardware configurations can be envisaged for a DMT. It is possible for example that the terminalcontains two entirely separate transceivers, simply sharing the keyboard, display microphone, earpiece etc. Completelyindependent operation may then be possible, but there will be difficult technical issues of receiver blocking to overcome.It is also possible for parts of the transceivers to be common, reducing the cost of the terminal, but also limiting thepossibilities of simultaneous operation. The exact functionality of the interworking function will depend on the terminalconfiguration.PSIST TR 101 072:2000

TR 101 072 V1.1.1 (1997-06)12The different possible radio configurations may have impact on the networks (see clause 7). The different radioconfigurations will also affect the performance specifications which the terminals may meet (see clause 6). However, itis undesirable to have different regulatory requirements dependent on the implementation of a DMT, and this should beavoided.5.2Specific terminal configurationsFive general terminal configurations denoted as types 1 - 5 have been identified. The essential differences between theterminal types are summarized in table 2. The type 3 terminal is subdivided into a and b categories depending onwhether simultaneous receive is supported.Table 2: Summary of terminal typesTerminaltypeNumber oflocationregistrationsAir interfaceselectionSimultaneousreceiveSimultaneous dual-modetransmit/receiveSimultaneoustransmit11manualnonono21automaticyes or nonono3aup to 2automaticyesnono3bup to 2automaticnonono4up to 2automaticyesyesno5up to 2automaticyesyesyesOf these DMT types, type 1 is the only truly basic type, types 2 and 3 are identified as interesting for earlyimplementations and types 4 and 5 are considered as advanced and for later implementations.5.2.1The terminal can only be location registered through one airinterface - manual switch - type 1This terminal type can only be location registered through one air interface at a time. Switching from one air interface tothe other is performed manually. No automatic or background scanning of the non-active air interface occurs. Thismeans that the terminal will never operate over DECT and GSM/PCN air interfaces at the same time.5.2.2The terminal can only be location registered through one airinterface - automatic scan - type 2This terminal type can only be location registered through one air interface at a time although it shall monitor both todetermine which will give the best operation.Switching between air interfaces is automatic but may be manually overridden.The intelligent scanning algorithm will entail occasionally switching from the active air interface (the air interface overwhich the terminal is registered) to the other air interface to listen for broadcast channels. A decision to switch betweenair interfaces is based on RSSI measurements and access rights. These issues are covered separately in subclause 5.4.2.Two implementations of type 2 terminals can be envisaged. These are:-separate GSM and DECT transceivers;-a single transceiver which is time multiplexed between DECT and GSM.The first is therefore capable of simultaneous reception, and could, for example, be idle-locked to a DECT bearer andsimultaneously perform background scanning of GSM carriers. By contrast, the second implementation has only a singlereceiver which has to be multiplexed between DECT and GSM air interfaces, and in the above example could onlyperform GSM background scanning between points in the DECT multiframe where paging messages might be received.PSIST TR 101 072:2000

TR 101 072 V1.1.1 (1997-06)135.2.3The terminal can be location registered through both air interfaces -type 3The terminal is simultaneously location registered through both air interfaces. However, if the same subscriptioninformation is used on both air interfaces then the terminal (GIP/GSM DMT) shall not attempt to location register onboth at the same time.A type 3a terminal comprises a GSM transceiver and a DECT transceiver, whereas a type 3b terminal consists of asingle transceiver which is time multiplexed between DECT and GSM. A type 3b terminal will inevitably miss somepaging messages. In addition, if a type 3a or 3b terminal enters active communication over either air interface, then theother will be disabled and this will potentially result in additional missed paging messages.This is considered to be a technically simple scenario to implement but it requires advanced tests to be investigated andspecified. Further study of this configuration will not be considered for the first edition of TBR 39 [28].5.2.4The terminal can be location registered through both air interfacesbut can be in active communication on only one - type 4In this scenario, one transceiver may be operational at the same time as the other is scanning (receiving).This could for instance be the situation for a terminal in active communication in the local DECT system, but at thesame time listening for paging on the GSM air interface. Since the terminal cannot respond to paging on the othernetwork whilst still in communication with the first network, this configuration may have little practical value.This is considered to be a technically difficult scenario to implement. Early DMTs are expected to use one of the radioconfigurations previously described. Further study of this configuration will not be considered for the first edition ofTBR 39 [28].5.2.5The terminal can be in active communication on both air interfacesat the same time - type 5For instance a terminal in active communication in the DECT system can receive and accept a call from the GSM/PCNsystem at the same time with the option to switch manually to one of the systems while having the other one still activein a hold mode.This is considered to be a technically difficult scenario to implement. Early DMTs are expected to use one of the radioconfigurations previously described. Further study of this configuration will not be considered for edition 1 ofTBR 39 [28].5.3Subscription configurationsA DMT may contain different subscriptions related to each air interface or could have a subscription which could beused in both the DECT and the GSM air interface.5.3.1Multiple subscriptionsIt is possible to have more than one active subscription at the same time via the same DECT FP. Thus allowing aterminal operating over the DECT air interface and attached to an FP which provides both Private Automatic BranchExchange (PABX) and GSM services, to be simultaneously location registered with its PABX and GSM subscriptionsvia the same DECT FP.It is important that where a subscription can be used on both air interfaces, that the PP does not attempt tosimultaneously register, using the same set of subscription data via two air interfaces. A location registration on a secondsystem, with the same set of subscription data will result in the cancellation of the first location registration.Standardization for DMTs (and associated regulation) needs to allow for the above possibilities.PSIST TR 101 072:2000

TR 101 072 V1.1.1 (1997-06)145.3.2Subscriptions scenariosA terminal that can communicate on several systems needs initially to be able to handle several subscriptions related tothe various networks it has access to. A DECT/GSM DMT will always have one PLMN subscription. In addition to thisit may have one or several GAP subscription.NOTE:A subscription is a set of identities that enables the terminal access to a system or network and notnecessarily a legal contract for charging.A DECT/GSM DMT consists of two parts, a DECT part and a GSM part. Depending on which DECT air interfaceprofile (see annex B) that is supported in the DECT part there are, at least, two different kinds of dual-mode terminalsthat need to be distinguished:-the DECT part shall always be compliant with the GAP but may also in addition comply with the GIP, seesubclause 5.3.2.2;-DMTs where the DECT part is compliant with the CAP or the Integrated Services Digital Network (ISDN)Access Profile (IAP) are from a subscription point of view considered in the same way as DMTs where theDECT part is compliant with GAP only, see subclause 5.3.2.1.Scenarios where the terminal contains identities related to only one air interface are not considered in this subclausesince in this case the DMT acts as a normal single mode terminal (except in the case of emergency calls which iscovered in subclause 8.5). The possibility of a DMT with two or more GAP subscriptions to be active through the sameFP, at the same time is not considered in this document since it does not imply any change compared to ordinary DECTPPs. Neither is the future possibility of having several GSM subscription (with the same operator) in the DMTconsidered.5.3.2.1GAP/GSMThis subclause addresses DMTs where the DECT part is GAP, CAP or IAP (ARI A/B/C) and does not support theDECT-GSM interworking profile (ARI D).If the DECT part of the DMT is GAP only, it shall support at least two ARI class A/B/C subscriptions. The DECTsubscriptions may relate to a private (residential or business - ARI A/B ) DECT system or to a public DECT (ARI C)service.NOTE:The DECT FP may support access to both ARI class A, B, C and ARI class D networks. A GAP/GSMDMT can access only the ARI class A, B, C network via the DECT FT.The ARI class A, B, C network may offer varying levels of mobility. If the system is a single FP then only fairly limitedmobility is available. The FP may be connected to a corporate network which supports mobility, or a public accessnetwork supporting Wide Area Mobility (WAM). The ARI class A, B, C subscription may also allow roaming betweenpublic and private DECT networks (e.g. CTM). All these networks fall within the definition of a ARI class A, B, Cnetwork as used within this document. These different possibilities will have a major impact on the service seen by theuser, and this is considered further in subclause 5.5. From the subscription scenario viewpoint, all these systems are seensimply as a ARI class A, B, C subscription.The GAP/GSM DMT can be used to access ARI class A, B, C systems via the DECT air interfaces as well as PLMN viathe GSM air interface. The DMT has at least two subscriptions, one PLMN, and at least one ARI class A, B, Csubscription. This type of DMT can be used in network scenarios where public, business or residential DECT servicesare combined with WAM through the GSM subscription. Depending on terminal configuration, the GAP/GSM DMTcould be registered in several networks at the same time using different subscriptions. Seamless service provision willnot be possible but operators can support the GAP/GSM DMT with a one-number service.PSIST TR 101 072:2000

TR 101 072 V1.1.1 (1997-06)15The GAP/GSM DMT can operate the following subscription configurations:-one PLMN subscription;-one PLMN + one (or more) ARI class A, B subscription(s);-one PLMN + one (or more) ARI class C subscription(s);-one PLMN + one (or more) ARI class A, B subscription(s) + one (or more) ARI class C subscription(s).All the terminal configurations of subclause 5.2 are relevant to the GAP/GSM DMT.5.3.2.2GIP/GSMThis subclause addresses DMTs which support both GAP and GIP.The GIP is based on the GAP which means that GIP portables can access ARI class A, B, C FPs (if supported by a ARIclass A, B, C subscription in the portable). The GIP/GSM DMT, can access a PLMN network either using DECT/GSMaccess (ARI class D) via an FT with suitable network connections or the GSM air interface, based on a PLMNsubscription.If the DMT supports GIP, the DMT can be used to access PLMNs via the DECT air interface. The DMT needs only onePLMN subscription and seamless service provision is possible. The GIP/GSM DMT cannot be registered via the GSMand DECT air interfaces at the same time with the same subscription, as each location registration via one air interfacewill result in the cancellation of a previous location registration on the other air interface.This type of DMT is used in the network scenarios where PLMN-based urban public mobility services are combinedwith WAM through the GSM subscription or in a scenario where a GSM service is enhanced by a DECT/GSM access.Since the GIP is based on the GAP, the GIP/GSM DMT could also store ARI class A/B/C subscriptions and behave as aGAP/GSM DMT. It can be used in public, business and residential DECT systems as well as in DECT/GSM accesssystems and the PLMN network.The GIP/GSM DMT can operate the following subscription configurations:-one PLMN subscription;-one PLMN subscription + one (or more) ARI class A, B subscription(s);-one PLMN subscription + one (or more) ARI class C subscription(s);-one PLMN subscription + one (or more) ARI class A, B subscription(s) + one (or more) ARI class Csubscription(s).Only the first two terminal configurations of subclause 5.2 are relevant for a GIP/GSM DMT with only a PLMNsubscription.5.4Network configurationsFor the first phase of dual mode standardization, it is assumed that the portable supports at least basic speech services.The connection between DECT access network and PLMN network could be either via an A interface or via an ISDNinterface. Support of other (non basic-speech) GSM services will be considered at a later stage. Clearly when additionalservices are added they need to be supported within the networks. Currently, support for Short Message Service (SMS)and other GSM services, is only defined for A interface.Based on the terminal configurations in subclauses 5.2.1 to 5.2.3 and the subscription scenarios in subclause 5.3.2, theDMT can select and switch to a new access network in several different ways. Depending on the types of the old and thenew access network, the are different requirements on how the DMT behaves. The changes of network that a
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