ETSI TR 122 983-2018 Digital cellular telecommunications system (Phase 2+) (GSM) Universal Mobile Telecommunications System (UMTS) LTE Services alignment and migration (V15 0 0 3GP.pdf

1、 ETSI TR 122 983 V15.0.0 (2018-07) Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Services alignment and migration (3GPP TR 22.983 version 15.0.0 Release 15) TECHNICAL REPORT ETSI ETSI TR 122 983 V15.0.0 (2018-07)13GPP TR 22.983 v

2、ersion 15.0.0 Release 15Reference RTR/TSGS-0122983vf00 Keywords GSM,LTE,UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (0

3、6) N 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without

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6、nt to one of the following services: https:/portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. Th

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8、t of its Members. 3GPPTM and LTETMare trademarks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members. GSMand the GSM logo are trademarks registered and owned by the GSM Association. ETSI ETSI TR 122 983 V1

9、5.0.0 (2018-07)23GPP TR 22.983 version 15.0.0 Release 15Intellectual Property Rights Essential patents IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members

10、and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (https:/ipr.etsi.org

11、/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the pre

12、sent document. Trademarks The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners. ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no right to use or reproduce any trademark and

13、/or tradename. Mention of those trademarks in the present document does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Report (TR) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present

14、document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/w

15、ebapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and

16、“must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TR 122 983 V15.0.0 (2018-07)33GPP TR 22.983 version 15.0.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions

17、 and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviations . 5g34 Definition of Service Sets in different domains . 6g34.1 CS/PS (non-IMS) domain 6g34.1.1 CS Services (teleservices 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digi

18、t is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TR 122 983 V15.0.0 (2018-07)53GPP TR 22.983 version 15.0.0 Release 151 Scope This docu

19、ment studies how services to the end user should be delivered and managed regardless of how the user accesses the services (e.g. using CS or IMS) and to ensure a consistent user experience. The services in scope include but are not restricted to: Conversational voice and video services Messaging ser

20、vices Supplementary Services as applied to the above. For each of the above types, the service features that should be supported when accessing the service via CS or IMS using any appropriate access type are described. Also, how each service will behave when transferring between domains is described

21、. The work will also consider how to support existing (“traditional“) services while allowing new, innovative services to be provided to the end user using the enhanced capabilities of the IMS. It will cover possible migration paths from where services are provided on both CS and IMS to IMS Call and

22、 Service Control. Also, this work will consider roaming and call handling, interaction with legacy terminals, and the provision of user state and location for services accessed via CS or IMS and for services transferred between them. 2 References The following documents contain provisions which, thr

23、ough reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest

24、version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document. 1 3GPP TR 21.905: “Vocabulary for 3GPP Specifications“. 3 Definitions and abbrevia

25、tions 3.1 Definitions For the purposes of the present document, the terms and definitions given in TR 21.905 1 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 1. 3.2 Abbreviations For the purposes of the pres

26、ent document, the abbreviations given in TR 21.905 1 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905 1. ETSI ETSI TR 122 983 V15.0.0 (2018-07)63GPP TR 22.983 version 15.0.0 Release 154 Defini

27、tion of Service Sets in different domains 4.1 CS/PS (non-IMS) domain 4.1.1 CS Services (teleservices b) 3G (UMTS) radio access network connected to Circuit Switched and Packet Switched core; c) 2G (GSM/GPRS) radio access network connected to IMS via the PS core; d) 3G (UMTS) radio access network con

28、nected to IMS via the PS core; e) WLAN radio access network connected to Circuit Switched and Packet Switched core (GAN); f) WLAN radio access network connected to IMS via the PS core. Each of the above connection scenarios will have its own service characteristics. There is a range of access speeds

29、 from the radio access networks and a range of capabilities from the core networks and these will determine how a particular service can be delivered and, therefore, the customer experience. 5.2 Network configurations For many operators networks, there will be a range of connection scenarios in use

30、as described above. This will arise as the core networks and access networks are upgraded. The options for how networks are upgraded are described in section 6, below. What is clear is that most operators will have networks in which there are mixed capabilities for a Core NetworksAccess NetworksIuGb

31、AGatewayIMSApplication ServersTransportSignallingUTRANPS(SGSN - GGSN)Other (e.g. WIMAX)Fixed IPGSM/ GPRSGatewaysCS(MSC) GbAIPWLANGAN-CETSI ETSI TR 122 983 V15.0.0 (2018-07)113GPP TR 22.983 version 15.0.0 Release 15considerable period and that the way services are managed needs to be considered. The

32、key points to consider concerning customer service experience are described below. 5.3 Service experience The users service experience needs to be consistent depending on the connection scenario used. Specifically, the following is required: The use of Supplementary Services should be applied consis

33、tently across domains and, as a default, the setting of SS parameters in one domain should be reflected in the other domain. For example, any Call Forwarding and Call Barring numbers set by the user should be retained and used whichever domain is used. It should, however, be possible to set differen

34、t parameters in different domains if required. For example, capability to have different settings for Supplementary Services in IMS for enhanced services such as Multimedia Telephony Service should be possible. The smooth transition of services as the user moves from one connection scenario to anoth

35、er. If the user moves from a high capability scenario to a low capability scenario (e.g. from 3G/IMS to 2G/Circuit Switched) the service should be degraded gracefully. An example is the degradation of Multimedia Telephony to a voice only call. Subsequently, if the user moves back to a high capabilit

36、y scenario, the added features should become available again. 6 Use cases 6.1 Use case 1, MSC server control of all accesses This use case describes the situation where an operator has introduced packet access and support for the services and service control on the MSC Server. Initially users have v

37、oice service over CS on GSM/UMTS. Service and control for this is provided by the MSC. Voice service is transferred to VoIP on UMTS and WLAN. Service and control for VoIP is provided by MSC Server. The user should be unaware of the change. For example, there should be no need for the user to change

38、any settings (e.g. for supplementary services), and the services delivered should be as good as or better than before. 6.2 Use case 2, migrating to IMS This use case describes the situation where an operator is undertaking a migration and has different configurations in the network in different regi

39、ons. Users on this operator use newer networks in part of the country and fallback to older networks elsewhere. For example, in the cities there is WiMAX, HSPA, UMTS and GSM/GPRS controlled by IMS; in urban areas there is HSPA, UMTS and GSM/GPRS controlled by MSC Servers and in rural areas there is

40、just GSM/GPRS controlled by MSCs. The user should experience a minimum service level when on the legacy part of the network and should generally be unaware that he/she is using the more advanced parts of the network except for the availability of new and improved services where provided. Additionall

41、y, there should be no need for the user to change any settings (e.g. for supplementary services) when moving from one part of the network to another. 6.3 Use case 3, after migration to IMS This use case describes the situation where an operator has migrated all services and service control onto IMS

42、from the traditional GSM network Initially, users have voice service over CS, text messaging (SMS) over GSM and IM/Presence service over GSM/GPRS. Voice and SMS service and control are provided over MSCs/CAMEL; IM/Presence service and control is provided over dedicated platform in the core network.

43、All of these services have been migrated to IP based technology. All services are now provided and controlled by IMS. ETSI ETSI TR 122 983 V15.0.0 (2018-07)123GPP TR 22.983 version 15.0.0 Release 15The user should be unaware of the migration except for the availability of new and improved services.

44、For example, there should be no need for the user to change any settings (e.g. for supplementary services), and the services delivered should be as good as or better than before. 6.4 Use case 4, inter-working between IMS & CS based networks This use case describes the situation where users in a netw

45、ork that has completely migrated to IMS service and service control are communicating with users on legacy (CS based) networks. Users on their Home PLMN have VoIP voice service provided and controlled by IMS. They need to be able to connect with other users on other networks who have voice service o

46、ver CS that is provided and controlled by MSCs/CAMEL. The user should be unaware that he/she is communicating with a user on a network with a different configuration. All supplementary services should continue to work correctly and as expected. 6.5 Use case 5, roaming This use case describes the sit

47、uation where a user from a network that has completely migrated to IMS service and service control roams on a legacy (CS based) network. Users on their Home PLMN have VoIP voice service provided and controlled by IMS. A user roams onto a VPLMN that has voice services provided and controlled by MSCs/

48、CAMEL. The VPLMN does not support PS access of sufficient quality for VoIP. The user should be unaware that he/she is roaming on a legacy network except that some advanced services may not be available. There should be no difference in how the voice service is used including the use of supplementary

49、 services. From the operator perspective, calls to and from the user should be handled in the most cost-effective manner. For example, outgoing calls from that user in the VPLMN should be handled locally with efficient routing of connections to and from the Home PLMN. 7 Migration scenarios 7.1 Background Currently only one service is defined for the IMS, which is similar to an existing CS service, i.e. the Multimedia Telephony Service. Although it can be expected that also other services will be defined there will always be a set of services a