1、 International Telecommunication Union ITU-T Series YTELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Supplement 1(07/2006) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS ITU-T Y.2000 series Supplement on NGN release 1 scope ITU-T Y-series Recommen
2、dations Supplement 1 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 Interfaces and protocols Y.40
3、0Y.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 capabilities and resource management
4、 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 NEXT GENERATION NETWORKS Frameworks and functional architecture models Y.2000Y.2
5、099 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.2300Y.2399 Network management Y.2400Y.2499 Network control
6、 architectures and protocols Y.2500Y.2599 Security Y.2700Y.2799 Generalized mobility Y.2800Y.2899 For further details, please refer to the list of ITU-T Recommendations. Y series Supplement 1 (07/2006) i Supplement 1 to ITU-T Y-series Recommendations ITU-T Y.2000 series Supplement on NGN release 1 s
7、cope Summary This Supplement to ITU-T Y.2000-series Recommendations on the scope of release 1 of the Next Generation Networks (NGN) provides the release 1 environment, release 1 services, descriptions and use cases. Source Supplement 1 to ITU-T Y-series Recommendations was agreed on 28 July 2006 by
8、ITU-T Study Group 13 (2005-2008). ii Y series Supplement 1 (07/2006) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is re
9、sponsible 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 th
10、e 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 collabor
11、ative basis with ISO and IEC. NOTE In this publication, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this publication is voluntary. However, the publication may contain certain mandatory
12、 provisions (to ensure e.g. interoperability or applicability) and compliance with the publication 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. The use of
13、such words does not suggest that compliance with the publication is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this publication may involve the use of a claimed Intellectual Property Right. ITU takes no position c
14、oncerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the publication development process. As of the date of approval of this publication, ITU had not received notice of intellectual property, protected by pate
15、nts, which may be required to implement this publication. 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 2008 All rights reserved. No part of this publicat
16、ion may be reproduced, by any means whatsoever, without the prior written permission of ITU. Y series Supplement 1 (07/2006) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Terms and definitions . 1 3.1 Definitions 1 3.2 Acronyms and abbreviations 2 4 NGN release 1 environment overview . 4 4.1 Transpo
17、rt functions. 6 4.2 Network-network interfaces (NNIs). 8 4.3 User profile functions. 8 4.4 End-user functions 8 5 NGN release 1 services. 9 5.1 Multimedia services 9 5.2 PSTN/ISDN emulation services. 10 5.3 PSTN/ISDN simulation services 10 5.4 Data communication services. 11 5.5 Public interest aspe
18、cts. 11 Appendix I Service descriptions and use cases. 13 I.1 General use cases 13 I.2 Business use cases 17 I.3 Medical use cases . 17 Appendix II Examples of categorization of services 19 II.1 Basic/enhanced services versus service/transport stratum . 19 II.2 Unicast/multicast/broadcast versus rea
19、l-time/non-real-time: General mapping 19 II.3 Business mapping. 21 II.4 Medical mapping 22 Bibliography. 23 Y series Supplement 1 (07/2006) 1 Supplement 1 to ITU-T Y-series Recommendations ITU-T Y.2000 series Supplement on NGN release 1 scope 1 Scope This Supplement provides the scope of release 1 o
20、f the Next Generation Networks (NGN). This Supplement provides the release 1 environment, release 1 services, descriptions and use cases. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Reco
21、mmendation. 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 other refer
22、ences 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.212 ITU-T Recommendation E.212 (2004), The international identif
23、ication plan for mobile terminals and mobile users. ITU-T M.3050.1 ITU-T Recommendation M.3050.1 (2004), Enhanced Telecom Operations Map (eTOM) The business process framework. ITU-T Y.2001 ITU-T Recommendation Y.2001 (2004), General overview of NGN. ITU-T Z.100 ITU-T Recommendation Z.100 (2002), Spe
24、cification and Description Language (SDL). 3 Terms and definitions 3.1 Definitions This Supplement uses the following terms: 3.1.1 application network interface: Provides a channel of interactions and exchanges between applications and NGN elements offering needed capabilities and resources for real
25、ization of services. 3.1.2 customer: The customer buys products and services from the enterprise or receives free offers or services. A customer may be a person or a business. Source for definition is ITU-T M.3050.1. See also “terms, definitions and high-level terminological framework for Next Gener
26、ation Networks“ in NGN-FGProceedings. 3.1.3 home network: The network of the service provider to which a given subscriber is subscribed. Source for definition is ITU-T E.212. 3.1.4 mobility: The ability for the user or other mobile entities to communicate and access services irrespective of changes
27、of the location or technical environment. The degree of service availability may depend on several factors including the access network capabilities, service level agreements between the users home network and the visited network (if applicable), etc. Mobility includes the ability of telecommunicati
28、on with or without service continuity. Source for definition is ITU-T Y.2001. 2 Y series Supplement 1 (07/2006) 3.1.5 nomadism: Ability of the user to change their network access point. When changing the network access point, the users service session is completely stopped and then started again, i.
29、e., there is no session continuity or hand-over possible. NOTE It is assumed that, normally, users shut down their service session before attaching to a different access point. See also “terms, definitions and high-level terminological framework for Next Generation Networks“ in NGN-FGProceedings. 3.
30、1.6 personal mobility: This is the mobility for those scenarios where the user changes the terminal used for network access at different locations. Personal mobility describes the ability of a user to access telecommunication services at any terminal on the basis of a personal identifier and the cap
31、ability of the network to provide those services delineated in the users service profile. See also “terms, definitions and high-level terminological framework for Next Generation Networks“ in NGN-FGProceedings. 3.1.7 service: A set of functions and facilities offered to a user by a provider. Source
32、for definition is ITU-T Z.100. 3.1.8 service continuity: The ability of a mobile object to maintain ongoing service, including current states, such as a users network environment and session for a service. See also “terms, definitions and high-level terminological framework for Next Generation Netwo
33、rks“ in NGN-FGProceedings. 3.1.9 subscriber: The person or organization responsible for concluding contracts for the services subscribed to and for paying for these services. Source for definition is ITU-T M.3050.1. NOTE See also definition of customer. Source for definition is ITU-T M.3050.1. See a
34、lso “terms, definitions and high-level terminological framework for Next Generation Networks“ in NGN-FGProceedings. 3.1.10 terminal mobility: This is the mobility for those scenarios where the same terminal equipment is moving or is used at different locations. Terminal mobility describes the abilit
35、y of a terminal to access telecommunication services from different locations and while in motion and the capability of the network to identify and locate that terminal. 3.1.11 end user: The end user is the actual user of the products or services offered by the enterprise. The end user consumes the
36、product or service. Source for definition is ITU-T M.3050.1. See also “terms, definitions and high-level terminological framework for Next Generation Networks“ in NGN-FGProceedings. NOTE Within this Supplement the term “user“ should be assumed to be “end user“. 3.1.12 visited network: The network th
37、at is local to the customer in a roaming configuration. See also “terms, definitions and high-level terminological framework for Next Generation Networks“ in NGN-FGProceedings. 3.2 Acronyms and abbreviations This Supplement uses the following abbreviations and acronyms: ADSL Asymmetric Digital Subsc
38、riber Line API Application Programming Interface ATM Asynchronous Transfer Mode DVB Digital Video Broadcast Y series Supplement 1 (07/2006) 3 FTTH Fibre to the Home GPS Global Positioning System IM Instant Messaging IMS IP Multimedia Subsystem IN Intelligent Network IP Internet Protocol IP-CAN IP Co
39、nnectivity Access Network ISDB ISDN Digital Broadcast ISDN Integrated Services Digital Network LAN Local Area Network MMS Multimedia Message Service NACF Network Attachment Control Functions NAPT Network Address Port Translation NGN Next Generation Network NNI Network-Network Interface OMA Open Mobi
40、le Alliance OSA Open Service Access OSE OMA Service Environment PBX Private Branch Exchange PC Personal Computer PDA Personal Digital Assistant PLMN Public Land Mobile Network PoN Push to talk over NGN PSTN Public Switched Telephone Network QoS Quality of Service RACF Resource Admission Control Func
41、tions RFID Radio Frequency Identification SDH Synchronous Digital Hierarchy SIP Session Initiation Protocol SLA Service Level Agreement SMS Short Message Service TDM Time Division Multiplex TDR Telecommunications for Disaster Relief URL Uniform Resource Locator VDSL Very high speed Digital Subscribe
42、r Line VoD Video on Demand VoIP Voice over Internet Protocol 4 Y series Supplement 1 (07/2006) VPN Virtual Private Network WLAN Wireless Local Area Network xDSL Various types of Digital Subscriber Line xPON various types of Passive Optical Networks 4 NGN release 1 environment overview The definition
43、 of an NGN is contained in ITU-T Y.2001. The objectives for NGN release 1 are to provide an extensible platform for services and an overall architecture designed to be extensible, allowing new services to be provided as required. The NGN framework is expected to support advanced architecture objecti
44、ves, to enable the offering of a comprehensive set of services over a unifying IP-layer network. The NGN is expected to support a multiplicity of access transport functions and a variety of mobile and fixed terminal types. Services are not limited to those provided by the home network, but may be ob
45、tained from multiple service providers and third parties. Services shall be able to traverse multiple providers networks. The functions that are supported by NGN release 1 specifications are illustrated in Figure 1. The figure includes the interfaces between NGN and end-user functions, between NGN a
46、nd other networks and between NGN and applications. The objectives for NGN release 1 are to provide an extensible platform and architecture supporting: Multimedia services (including PSTN/ISDN simulation services). PSTN/ISDN replacement support (emulation services). Data communication services. Publ
47、ic interest aspects (for both multimedia services and PSTN/ISDN replacement support). In NGN release 1 all services are carried over IP, although IP itself may in turn be carried over a number of underlying technologies, such as ATM, Ethernet, etc. Release 1 assumes IPv4 or IPv6 networking at packet
48、 interconnection points and packet network interfaces and therefore focuses on the definition of IP packet interfaces. Y series Supplement 1 (07/2006) 5 Y.2000-seriesSuppl.1(06)_F01LegacyterminalsEnd-userfunctionsNGNterminals CustomernetworksLegacyterminalsApplication support functions and service s
49、upport functionsApplicationsService stratumS. userprofilefunctionsOther NGN servicecomponentsPSTN/ISDN emulationservice componentIP multimediaservice componentServicecontrolfunctionsT. userprofilefunctionsNetwork attachmentcontrol functions(NACF)Resource and admissioncontrol functions(RACF)Access networkfunctionsCore transportfunctionsTransport stratumOther networksNOTE Gateway (GW) may exist in either the transport stratum or end-user functions.EdgefunctionsGWGWFigure 1 Tra
