1、 International Telecommunication Union ITU-T Y.2201TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (09/2009) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Next Generation Networks Service aspects: Service capabilities and service architecture Req
2、uirements and capabilities for ITU-T NGN Recommendation ITU-T Y.2201 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
3、aspects Y.300Y.399 Interfaces 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, acce
4、ss, network capabilities 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
5、GENERATION NETWORKS 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.2249Service aspects: Interoperability of services and networks in NGN Y.2250Y.2299 Numbering, naming a
6、nd addressing Y.2300Y.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.2899 Carrier grade open environment Y.2900Y.2999 For further details, please refer to the list of ITU-T
7、Recommendations. Rec. ITU-T Y.2201 (09/2009) i Recommendation ITU-T Y.2201 Requirements and capabilities for ITU-T NGN Summary Recommendation ITU-T Y.2201 provides high-level requirements for services and capabilities of a next generation network (NGN). Source Recommendation ITU-T Y.2201 was approve
8、d on 12 September 2009 by ITU-T Study Group 13 (2009-2012) under the WTSA Resolution 1 procedure. This edition includes Corrigendum 1 which was approved on 29 January 2010 by ITU-T Study Group 13. Keywords Accounting, addressing, authentication, authorization, capabilities, capability requirements,
9、charging, context awareness, enterprise network, identification, identity management, interoperability, interworking, IPTV, IPv6 support, management, mobility, multicast, naming, NGN, numbering, OAM, open service environment, policy, privacy, profile, QoS, security, service enabler. ii Rec. ITU-T Y.
10、2201 (09/2009) 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 is respo
11、nsible 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 by the I
12、TU-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 collaborati
13、ve 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 certain man
14、datory 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 requirements. T
15、he 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. ITU tak
16、es 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 intellectual prope
17、rty, 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 reserved.
18、 No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T Y.2201 (09/2009) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 4 3.1 Terms defined elsewhere 4 3.2 Terms defined in this Recommendation . 6 4 Abbreviations and
19、 acronyms 8 5 Conventions 10 6 Transport . 10 6.1 Transport connectivity 10 6.2 Communication modes . 10 6.3 Transport network components 11 6.4 Network attachments 11 6.5 IPv6 support 11 6.6 Multicast support 12 7 Service and application support 12 7.1 Open service environment 12 7.2 Service enable
20、rs 13 7.3 Context awareness 19 8 Routing . 20 9 Quality of service 21 9.1 General QoS requirements . 21 9.2 Network QoS classes 21 9.3 Service/application priority 21 9.4 QoS control . 22 9.5 QoS signalling 22 9.6 Performance 22 9.7 Processing and traffic management 22 10 Identification and security
21、 23 10.1 General requirements for identification, authentication and authorization 23 10.2 Requirements for identification 24 10.3 Requirements for authentication . 25 10.4 Requirements for authorization 26 10.5 Identity management 26 10.6 Security requirements . 27 10.7 Critical infrastructure prot
22、ection 28 11 Management . 28 12 Mobility handling . 29 iv Rec. ITU-T Y.2201 (09/2009) Page 13 Profile management 30 13.1 User profile management . 30 13.2 Device profile management 30 14 Media handling . 31 14.1 Media resource management 31 14.2 Requirements for codecs 32 15 Content management 34 16
23、 Operations and provisioning . 35 16.1 Requirements for NNA (numbering, naming and addressing) . 35 16.2 Accounting and charging 37 16.3 OAM requirements . 37 16.4 Policy management 39 16.5 Survivability requirements . 40 17 User networks including enterprise networks . 41 17.1 General requirements
24、on NGN for access via user networks . 41 17.2 General requirements for user networks . 42 17.3 Enterprise networks 42 18 Interconnection and interworking . 46 18.1 Interconnection requirements . 46 18.2 Interoperability requirements . 47 18.3 Interworking requirements . 47 18.4 Non-disclosure of inf
25、ormation across NNI and ANI interfaces . 48 18.5 Inter-provider exchange of user-related information . 49 19 Service-specific requirements . 49 19.1 PSTN/ISDN emulation . 49 19.2 Real-time multimedia conversational services including PSTN/ISDN simulation . 49 19.3 IPTV services . 50 19.4 Enterprise
26、services 52 19.5 Applications and services using tag-based identification . 52 19.6 Managed delivery services . 52 19.7 Visual surveillance services . 52 19.8 Ubiquitous sensor network (USN) applications and services 53 19.9 Multimedia communication centre services . 53 19.10 VPN services in NGN 53
27、20 Public interest aspects . 54 20.1 Lawful interception 54 20.2 Malicious communication identification 54 20.3 Unsolicited communication 54 Rec. ITU-T Y.2201 (09/2009) v Page 20.4 Emergency telecommunication 55 20.5 User identifier presentation and privacy . 56 20.6 Network or service provider sele
28、ction 57 20.7 Users with disabilities . 57 20.8 Number portability . 57 20.9 Service unbundling . 57 20.10 Anonymous communication rejection 57 Appendix I Main differences in terms of high-level requirements and capabilities between this version of Recommendation ITU-T Y.2202 (Y.2201 Rev.1) and the
29、previous version of Recommendation ITU-T Y.2201 (2007) 58 Appendix II Mapping of services to service enablers . 59 Bibliography. 61 Rec. ITU-T Y.2201 (09/2009) 1 Recommendation ITU-T Y.2201 Requirements and capabilities for ITU-T NGN 1 Scope This Recommendation specifies the high-level requirements
30、for the development of a set of ITU-T Recommendations which will constitute NGN. The high-level requirements and related capabilities specified in this Recommendation are aligned with the general goals and objectives captured in ITU-T Y.2001 and are based on the objectives of NGN release 2 b-ITU-T Y
31、.Sup-7. The requirements are mainly provided from a high-level perspective, and are not intended to constitute precise functional requirements for the different NGN entities. More detailed requirements are outside the scope of this Recommendation. It is recognized that a specific realization of NGN
32、may be constituted by an arbitrary set (or superset) of services supported in NGN and of capabilities as specified in this Recommendation. NOTE 1 Text taken from ITU-T Y.2201 uses blue font. Also, Appendix I identifies the main differences in terms of high-level requirements and capabilities between
33、 this Recommendation and ITU-T Y.2201. NOTE 2 It is also required to consider how NGN can contribute to energy savings. However, studies for this topic are ongoing in ITU-T Study Group 5 based on the output from the ITU-T Focus Group on ICTs and Climate Change. So requirements from energy savings as
34、pects are for further study in this Recommendation. For the output from the ITU-T Focus Group on ICTs and Climate Change, please see b-ITU-T Climate. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions
35、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 Recommendations and
36、 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 E.106 Recommendation ITU-T E.106 (2003), International
37、 Emergency Preference Scheme (IEPS) for disaster relief operations. ITU-T E.107 Recommendation ITU-T E.107 (2007), Emergency Telecommunications Service (ETS) and interconnection framework for national implementations of ETS. ITU-T E.164 Recommendation ITU-T E.164 (2005), The international public tel
38、ecommunication numbering plan. ITU-T E.212 Recommendation ITU-T E.212 (2008), The international identification plan for public networks and subscriptions. ITU-T G.711 Recommendation ITU-T G.711 (1988), Pulse code modulation (PCM) of voice frequencies. ITU-T G.722 Recommendation ITU-T G.722 (1988), 7
39、 kHz audio-coding within 64 kbit/s. 2 Rec. ITU-T Y.2201 (09/2009) ITU-T G.722.2 Recommendation ITU-T G.722.2 (2003), Wideband coding of speech at around 16 kbit/s using Adaptive Multi-Rate Wideband (AMR-WB). ITU-T G.729 Recommendation ITU-T G.729 (2007), Coding of speech at 8 kbit/s using conjugate-
40、structure algebraic-code-excited linear prediction (CS-ACELP). ITU-T G.729.1 Recommendation ITU-T G.729.1 (2006), G.729-based embedded variable bit-rate coder: An 8-32 kbit/s scalable wideband coder bitstream interoperable with G.729. ITU-T G.808.1 Recommendation ITU-T G.808.1 (2006), Generic protec
41、tion switching Linear trail and subnetwork protection. ITU-T H.263 Recommendation ITU-T H.263 (2005), Video coding for low bit rate communication. ITU-T H.264 Recommendation ITU-T H.264 (2005), Advanced video coding for generic audiovisual services. ITU-T I.610 Recommendation ITU-T I.610 (1999), B-I
42、SDN operation and maintenance principles and functions. ITU-T M.3050.0 Recommendation ITU-T M.3050.0 (2007), Enhanced Telecom Operations Map (eTOM) Introduction. ITU-T M.3050.1 Recommendation ITU-T M.3050.1 (2007), Enhanced Telecom Operations Map (eTOM) The business process framework. ITU-T M.3060 R
43、ecommendation ITU-T M.3060/Y.2401 (2006), Principles for the Management of Next Generation Networks. ITU-T Q.825 Recommendation ITU-T Q.825 (1998), Specification of TMN applications at the Q3 interface: Call detail recording. ITU-T Q.1703 Recommendation ITU-T Q.1703 (2004), Service and network capab
44、ilities framework of network aspects for systems beyond IMT-2000. ITU-T Q.1706 Recommendation ITU-T Q.1706/Y.2801 (2006), Mobility management requirements for NGN. ITU-T X.462 Recommendation ITU-T X.462 (1996), Information technology Message Handling Systems (MHS) Management: Logging information. IT
45、U-T X.805 Recommendation ITU-T X.805 (2003), Security architecture for systems providing end-to-end communications. ITU-T Y.101 Recommendation ITU-T Y.101 (2000), Global Information Infrastructure terminology: Terms and definitions. ITU-T Y.110 Recommendation ITU-T Y.110 (1998), Global Information I
46、nfrastructure principles and framework architecture. ITU-T Y.1271 Recommendation ITU-T Y.1271 (2004), Framework(s) on network requirements and capabilities to support emergency telecommunications over evolving circuit-switched and packet-switched networks. ITU-T Y.1541 Recommendation ITU-T Y.1541 (2
47、006), Network performance objectives for IP-based services. ITU-T Y.1710 Recommendation ITU-T Y.1710 (2002), Requirements for Operation Universal Mobile Telecommunications System (UMTS); AMR speech Codec; General description (3GPP TS 26.071 version 6.0.0 Release 6). TIA-127-C TIA Standard TIA-127-C
48、(2007), Enhanced Variable Rate Codec, Speech Service Options 3, 68, and 70 for Wideband Spread Spectrum Digital Systems. 4 Rec. ITU-T Y.2201 (09/2009) 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 accounting ITU-T X.462: The action of
49、 collecting information on the operations performed within a system and the effects thereof. 3.1.2 address ITU-T Y.2091: An address is the identifier for a specific termination point and is used for routing to this termination point. 3.1.3 application network interface (ANI) ITU-T Y.2012: Interface which provides a channel for interactions and exchanges between applications and NGN elements. The ANI offers capabilities and resource
