1、 International Telecommunication Union ITU-T Y.2808TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (06/2009) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Next Generation Networks Generalized mobility Fixed mobile convergence with a common IMS se
2、ssion control domain Recommendation ITU-T Y.2808 ITU-T Y-SERIES RECOMMENDATIONS GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS GLOBAL INFORMATION INFRASTRUCTURE General Y.100Y.199 Services, applications and middleware Y.200Y.299 Network aspects Y.300Y.399 I
3、nterfaces and protocols Y.400Y.499 Numbering, addressing and naming Y.500Y.599 Operation, administration and maintenance Y.600Y.699 Security Y.700Y.799 Performances Y.800Y.899 INTERNET PROTOCOL ASPECTS General Y.1000Y.1099 Services and applications Y.1100Y.1199 Architecture, access, network capabili
4、ties and resource management Y.1200Y.1299 Transport Y.1300Y.1399 Interworking Y.1400Y.1499 Quality of service and network performance Y.1500Y.1599 Signalling Y.1600Y.1699 Operation, administration and maintenance Y.1700Y.1799 Charging Y.1800Y.1899 IPTV over NGN Y.1900Y.1999 NEXT GENERATION NETWORKS
5、Frameworks and functional architecture models Y.2000Y.2099 Quality of Service and performance Y.2100Y.2199 Service aspects: Service capabilities and service architecture Y.2200Y.2249 Service aspects: Interoperability of services and networks in NGN Y.2250Y.2299 Numbering, naming and addressing Y.230
6、0Y.2399 Network management Y.2400Y.2499 Network control architectures and protocols Y.2500Y.2599 Future networks Y.2600Y.2699 Security Y.2700Y.2799 Generalized mobility Y.2800Y.2899Carrier grade open environment Y.2900Y.2999 For further details, please refer to the list of ITU-T Recommendations. Rec
7、. ITU-T Y.2808 (06/2009) i Recommendation ITU-T Y.2808 Fixed mobile convergence with a common IMS session control domain Summary Recommendation ITU-T Y.2808 describes principles, service and network capabilities, and architectures for IP multimedia subsystem (IMS) based fixed-mobile convergence (FMC
8、). Source Recommendation ITU-T Y.2808 was approved on 29 June 2009 by ITU-T Study Group 13 (2009-2012) under Recommendation ITU-T A.8 procedures. Keywords Convergence, fixed, fixed-mobile convergence (FMC), IP multimedia subsystem (IMS), international mobile telecommunication (IMT), mobile. ii Rec.
9、ITU-T Y.2808 (06/2009) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T
10、is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study
11、by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a col
12、laborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain cer
13、tain mandatory provisions (to ensure e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express require
14、ments. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right.
15、 ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectu
16、al property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2010 All rights r
17、eserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T Y.2808 (06/2009) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation . 3 4 Abbreviat
18、ions and acronyms 3 5 Conventions 5 6 IMS based FMC architecture 5 7 NGN domain model and convergence levels . 6 7.1 IMS-based NGN reference model 6 7.2 Principles of IMS-based service convergence 8 7.3 Convergence levels . 8 8 IMS-based FMC capabilities 10 8.1 Service-level convergence and service
19、continuity . 10 8.2 Session-control level convergence and convergence services . 14 8.3 Security capabilities 15 8.4 Public services capabilities . 16 9 Service level convergence architecture and FMC functions 17 9.1 Architecture and FMC functions for PS-PS service continuity 17 9.2 Architecture and
20、 FMC functions for PS-CS service continuity . 19 Appendix I Architecture of the current converged network . 21 I.1 3GPP architecture . 21 I.2 3GPP2 architecture . 23 I.3 3GPP evolved packet system 24 I.4 VCC architecture 27 Appendix II Transport level convergence . 29 Bibliography. 30 Rec. ITU-T Y.2
21、808 (06/2009) 1 Recommendation ITU-T Y.2808 Fixed mobile convergence with a common IMS session control domain 1 Scope This Recommendation describes the principles, service and network capabilities, and architectures for IP multimedia subsystem (IMS) based fixed-mobile convergence (FMC). This Recomme
22、ndation describes a network architecture that uses IMS to provide the same set of services to user terminals, regardless of whether they use fixed or mobile access network technologies, and ensures service continuity when the point of attachment of the terminal changes between different access netwo
23、rk technologies. The architecture employs the functional entities groupings defined in ITU-T Y.2021 for IMS related entities, and ITU-T Y.2012 for non-IMS related entities functionality. This Recommendation details IMS FMC specific architectural entities requirements which are generically defined in
24、 ITU-T Y.2012 and ITU-T Y.2021. Although this Recommendation is focused on future IMS-based networks, some legacy fixed network requirements are also addressed. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute
25、provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommen
26、dations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T Q.1707 Recommendation ITU-T Q.1707/Y.2804 (
27、2008), Generic framework of mobility management for next generation networks. ITU-T Q.1741.5 Recommendation ITU-T Q.1741.5 (2008), IMT-2000 references to Release 7 of GSM-evolved UMTS core network. ITU-T Q.1742.5 Recommendation ITU-T Q.1742.5 (2006), IMT-2000 references (approved as of 31 December 2
28、005) to ANSI-41 evolved core network with cdma2000 access network. ITU-T Q.1761 Recommendation ITU-T Q.1761 (2004), Principles and requirements for convergence of fixed and existing IMT-2000 systems. ITU-T Q.1762 Recommendation ITU-T Q.1762/Y.2802 (2007), Fixed-mobile convergence general requirement
29、s. ITU-T Y.2012 Recommendation ITU-T Y.2012 (2006), Functional requirements and architecture of the NGN release 1. ITU-T Y.2014 Recommendation ITU-T Y.2014 (2008), Network attachment control functions in next generation networks. ITU-T Y.2021 Recommendation ITU-T Y.2021 (2006), IMS for Next Generati
30、on Networks. ITU-T Y.2031 Recommendation ITU-T Y.2031 (2006), PSTN/ISDN emulation architecture. 2 Rec. ITU-T Y.2808 (06/2009) ITU-T Y.2262 Recommendation ITU-T Y.2262 (2006), PSTN/ISDN emulation and simulation. 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms de
31、fined elsewhere: 3.1.1 convergence ITU-T Q.1761: Coordinated evolution of formerly discrete networks towards uniformity in support of services and applications. 3.1.2 discrete mobility ITU-T Q.1761: See “Nomadism“. 3.1.3 discrete terminal mobility ITU-T Q.1761: Ability to have discrete mobility usin
32、g the same terminal. 3.1.4 fixed mobile convergence ITU-T Q.1762: In a given network configuration, the capabilities that provide services and application to the end user defined in Recommendation ITU-T Y.2091 regardless of the fixed or mobile access technologies being used and independent of the us
33、ers location. In the NGN environment (ITU-T Y.2011), it means to provide NGN services to end users regardless of the fixed or mobile access technologies being used. 3.1.5 handover b-ITU-T Q.1706: The ability to provide services with some impact on their service level agreements to a moving object du
34、ring and after movement. 3.1.6 home network b-ITU-T Q.1706: The network to which a mobile user is normally connected, or the service provider with which the mobile user is associated, and where the users subscription information is managed. 3.1.7 mobility ITU-T Q.1761: Ability to provide services ir
35、respective of changes that may occur by user/terminals activities. The user is able to change his network access point, as he moves, without interrupting his current service session, i.e., handovers are possible. In some situations, the handover may lead to a briefly suspended service session or it
36、may require a change in the level of service provided as a consequence of the capabilities of the new access point to which the user has become connected through the handover process. 3.1.8 mobility management b-ITU-T Q.1706: The set of functions used to provide mobility. These functions include aut
37、hentication, authorization, location updating, paging, download of user information and more. 3.1.9 nomadism ITU-T Q.1761: Ability of the user to change his network access point after moving; when changing the network access point, the users service session is completely stopped and then started aga
38、in, i.e., there is no handover possible. It is assumed that the normal usage pattern is that users shutdown their service session before moving to another access point or changing terminal. This is the mobility alluded to in the case of fixed mobile convergence. 3.1.10 personal mobility ITU-T Q.1761
39、: Ability of a user to access telecommunication services at any terminal on the basis of a personal identifier, and the capability of the network to provide those services according to the users service profile. NOTE Personal mobility involves the network capability to locate the terminal associated
40、 with the user for the purposes of addressing, routing and charging of the users calls. 3.1.11 roaming b-ITU-T Q.1706: The ability for a user to function in a serving network different from the home network. NOTE This is the ability of the users to access services according to their user profile whi
41、le moving outside of their subscribed home network, i.e., by using an access point of a visited network. This requires the ability of the user to get access to the visited network, the existence of an interface between home network and visited network, as well as a roaming agreement between the resp
42、ective network operators. Rec. ITU-T Y.2808 (06/2009) 3 3.1.12 seamless handover b-ITU-T Q.1706: It is a special case of mobility with service continuity since it preserves the ability to provide services without any impact on their service level agreements to a moving object during and after moveme
43、nt. 3.1.13 seamless service b-ITU-T Q.1706: A service that is implemented such that it will ensure that users will not experience any service disruptions while changing the point of attachment. 3.1.14 service continuity b-ITU-T Q.1706: The ability for a moving object to maintain ongoing service over
44、 including current states, such as users network environment and session for a service. 3.1.15 terminal mobility b-ITU-T Q.1706: This is the mobility for those scenarios where the same terminal equipment is moving or is used at different locations. It includes the ability of a terminal to access tel
45、ecommunication services from different locations and while in motion, and the capability of the network to identify and locate that terminal. 3.1.16 visited network b-ITU-T Y.2091: The network that is local to the customer in a roaming configuration. 3.2 Terms defined in this Recommendation None. 4
46、Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: 2G Second Generation 3G Third Generation AAA Authentication, Authorization and Accounting AC Authentication Centre AGW Access Gateway AKA Authentication and Key Agreement AN Access Network B2BUA Back to Bac
47、k User Agent BRAS Broadband Remote Access Server CAMEL Customized Applications for Mobile network Enhanced Logic CAN Connectivity Access Network CAVE Cellular Authentication and Voice Encryption CMIP Client MIP CN Core Network CS Circuit Switched CSI Combining CS and IMS services CSRN CS domain Rout
48、ing Number DSL Digital Subscriber Line DSLAM Digital Subscriber Line Access Multiplexer EPC Evolved Packet Core EPS Evolved Packet System 4 Rec. ITU-T Y.2808 (06/2009) FMC Fixed Mobile Convergence GERAN GSM Edge Radio Access Network GGSN Gateway GPRS Supporting Node GMSC Gateway MSC GPRS General Pac
49、ket Radio Service GPS Global Positioning System GSM Global System (for) Mobile (communications) GTP GPRS Tunnelling Protocol HSS Home Subscriber Server ICS IMS Centralized Services IMS IP Multimedia Subsystem IMT-2000 International Mobile Telecommunications 2000 IP Internet Protocol ISDN Integrated Services Digital Network ISIM IMS Subscriber Identity Module ISUP ISDN User Part IWF Inter-Working Function LAN Local Area Network MGCF Media Gateway Control Function MIH Med
