1、 International Telecommunication Union ITU-T Series YTELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Supplement 7(09/2008) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS ITU-T Y.2000-series Supplement on NGN release 2 scope ITU-T Y-series Recommen
2、dations Supplement 7 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 7 (09/2008) i Supplement 7 to ITU-T Y-series Recommendations ITU-T Y.2000-series Supplement on NGN release 2 s
7、cope Summary Supplement 7 to ITU-T Y-series Recommendations on the scope of release 2 of the next generation network (NGN) provides business roles and use cases, and discusses the value of the release. Source Supplement 7 to ITU-T Y-series Recommendations was agreed on 12 September 2008 by ITU-T Stu
8、dy Group 13 (2005-2008). ii Y series Supplement 7 (09/2008) 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
9、) is a permanent organ of ITU. ITU-T 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 yea
10、rs, establishes the topics for study 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 nece
11、ssary standards are prepared on a collaborative 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
12、 publication may contain certain mandatory 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
13、 used to express requirements. The use of 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 Intellectu
14、al Property Right. 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 publication development process. As of the date of approval of this publication, ITU had not received notice o
15、f intellectual property, protected by patents, 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 2009 All
16、 rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Y series Supplement 7 (09/2008) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Terms and definitions . 1 3.1 Definitions 1 3.2 Abbreviations and acronyms 2 4 NGN rele
17、ase 2 environment overview . 3 4.1 Transport functions. 6 4.2 Network-network interfaces (NNIs). 8 4.3 User network interfaces (UNIs) 8 4.4 User profile functions. 9 4.5 End-user functions 9 4.6 Gateway functions 10 5 NGN release 2 services. 10 5.1 Multimedia services (NGN R1 services) 10 5.2 PSTN/I
18、SDN emulation services (NGN R1 services) . 12 5.3 PSTN/ISDN simulation services (NGN R1 services) 12 5.4 Data communication services (NGN R1 services). 13 5.5 Public interest aspects (NGN R1 services). 13 5.6 IPTV services (NGN R2 services) . 13 5.7 Enterprise network services 15 5.8 Converged web b
19、rowsing services (CWBS) (NGN R2 service) 15 5.9 USN applications and services (NGN R2 service). 15 5.10 Tag-based identification applications and services (NGN R2 service) 15 5.11 Managed delivery services (MDS) (NGN R2 service). 15 Appendix I Service descriptions and use cases. 17 I.1 General use c
20、ases 17 I.2 Business use cases 21 I.3 Medical use cases . 22 Appendix II Examples of categorization of services 24 II.1 Basic/enhanced services versus service/transport stratum . 24 II.2 Unicast/multicast/broadcast versus real-time/non-real-time: General mapping 24 II.3 Business mapping. 26 II.4 Med
21、ical mapping 27 Bibliography. 28 Y series Supplement 7 (09/2008) 1 Supplement 7 to ITU-T Y-series Recommendations ITU-T Y.2000-series Supplement on NGN release 2 scope 1 Scope This supplement provides the scope of NGN release 2 of the next generation network (NGN). This supplement provides the envir
22、onment, service descriptions and use cases of NGN release 2. It also includes the text of the scope of NGN release 1 according to the NGN release concept defined in ITU-T Y.2006. 2 References ITU-T Y.2001 Recommendation ITU-T Y.2001 (2004), General overview of NGN. ITU-T Y.2006 Recommendation ITU-T
23、Y.2006 (2008), Description of capability set 1 of NGN release 1. 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.
24、2091 Recommendation ITU-T Y.2091 (2007), Terms and definitions for Next Generation Networks. ITU-T Y.Sup1 Supplement 1 to Y-series Recommendations (2006), ITU-T Y.2000 series Supplement on NGN release 1 scope. 3 Terms and definitions 3.1 Definitions This supplement uses the following terms: 3.1.1 co
25、ntext awareness: Context awareness is a capability to determine a next step in a telecommunication or computer system by referring status of relevant entities, such as subscribers connectivity, the location of remarked goods in a distribution system, and traffic status in a network. 3.1.2 customer p
26、remises equipment (CPE) ITU-T Y.2014: One or more devices allowing a user to access services delivered by NGN. 3.1.3 customer premises network (CPN): A network administered by the users. 3.1.4 home gateway (HGW) ITU-T Y.2014: Gateway between the customer premises network (CPN) and the access network
27、. 3.1.5 third-party service provider b-ITU-T M.3050.1: The third-party service provider provides services to the enterprise for integration or bundling as an offer from the enterprise to the customer. Third-party service providers are part of an enterprises seamless offer. In contrast, a complementa
28、ry service provider is visible in the offer to the enterprises customer, including having customer interaction. 2 Y series Supplement 7 (09/2008) 3.2 Abbreviations and acronyms This supplement uses the following abbreviations and acronyms: 10Base-T 10 Mbit/s Baseband data transmission over Twisted-p
29、air copper wire 3GPP 3rd Generation Partnership Project 3GPP2 3rd Generation Partnership Project 2 ADSL Asymmetric Digital Subscriber Line ANI Application Network Interface ATM Asynchronous Transfer Mode BPON Broadband Passive Optical Network CC/PP Composite Capabilities/Preference Profile CMR Custo
30、mized Multimedia Ring Services CP Content Provider CPN Customer Premises Network CWBS Converged Web Browsing Service DVB Digital Video Broadcast EPON Ethernet Passive Optical Network FMC Fixed-Mobile Convergence FTTH Fibre to the Home GPS Global Positioning System GUP Generic User Profile GW Gateway
31、 ID/LOC Identifier and Locator IM Instant Messaging IMS IP Multimedia Subsystem IP Internet Protocol IP-CAN IP Connectivity Access Network IPTV Internet Protocol Television IPv4 Internet Protocol version 4 IPv6 Internet Protocol version 6 ISDB-T ISDN Digital Broadcast Terrestrial ISDN Integrated Ser
32、vices Digital Network IVR Interactive Voice Response LAN Local Area Network MCC Multimedia Communication Centre MDS Managed Delivery Service MMS Multimedia Messaging Service NACF Network Attachment Control Functions NAPT Network Address Port Translation NGN Next Generation Network NNI Network-Networ
33、k Interface OMA Open Mobile Alliance OSA Open Service Access Y series Supplement 7 (09/2008) 3 PBX Private Branch Exchange PC Personal Computer PDA Personal Digital Assistant PLC Power Line Carrier PLMN Public Land Mobile Network PoN Push to talk over NGN PSTN Public Switched Telephone Network QoE Q
34、uality of Experience QoS Quality of Service RACF Resource Admission Control Functions RFID Radio Frequency Identification SDH Synchronous Digital Hierarchy SIP Session Initiation Protocol SLA Service Level Agreement SMS Short Message Service TDR Telecommunications for Disaster Relief UNI User-Networ
35、k Interface URL Uniform Resource Locator USN Ubiquitous Sensor Network VDSL Very high speed Digital Subscriber Line VoD Video on Demand VoIP Voice over Internet Protocol VPN Virtual Private Network WLAN Wireless Local Area Network xDSL Various types of Digital Subscriber Line xPON Various types of P
36、assive Optical Networks 4 NGN release 2 environment overview The definition of an NGN is contained in ITU-T Y.2001. The objectives for NGN release documents are to provide an extensible platform for services, and an overall architecture designed to be extensible, allowing new services to be provided
37、 as required. The NGN framework is expected to support advanced architecture objectives, 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
38、types. Services are not limited to those provided by the “home network“, but may be obtained from multiple service providers and third parties. Services are able to traverse multiple providers networks. The functions that are supported by NGN release 1 specifications are illustrated in Figure 1. The
39、 figure includes the interfaces between NGN and end-user functions, between NGN and 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); PST
40、N/ISDN replacement support (emulation services); data communication services; and public interest aspects (for both multimedia services and PSTN/ISDN replacement support). 4 Y series Supplement 7 (09/2008) In NGN release 1, all services are carried over IP, although IP itself may in turn be carried
41、over a number of underlying technologies, such as ATM, ethernet, etc. Release 1 assumes IPv4 or IPv6 networking at packet interconnection points and packet network interfaces, and therefore focuses on the definition of IP packet interfaces. In addition to these objectives, NGN release 2 provides an
42、extensible platform and architecture supporting the following: IPTV services; converged web browsing services; ubiquitous sensor network (USN) applications and services; tag-based identification applications and services; managed delivery services. Y.Suppl.7(08)_F01LegacyterminalsEnd-userfunctionsNG
43、Nterminals CustomernetworksLegacyterminalsApplication support functions and service support functionsApplicationsService stratumS. userprofilefunctionsOther NGN servicecomponentPSTN / ISDN emulationservice componentIP multimediaservice componentServicecontrolfunctionsandservicedeliveryfunctionsT. us
44、erprofilefunctionsNetwork attachmentcontrol functions(NACF)Resource and admissioncontrol functions(RACF)Access networkfunctionsCore transportfunctionsTransport stratumOthernetworksNOTE Gateway (GW) may exist in either transport stratum or end-user functions.-EdgefunctionsGWGWIPTV servicecomponentFig
45、ure 1 Transport and service configuration of the NGN NGN release 1 is expected to support the following functions: the control of access and core transport networks (QoS, admission control, authentication, etc.); the coordination of multiple control components to a single core transport network for
46、resource control; Y series Supplement 7 (09/2008) 5 the interworking and interoperability with legacy networks; mutual de-coupling of the application support functions from the service control functions and the transport stratum; access technology independence of service control functions and applic
47、ation support functions. Figure 1 shows a representation of the components of the NGN. The components shown overlap and may share functionality. It combines both the physical and functional overview of the scope of NGN and provides a simplistic decomposition of an NGN into defined portions to enable
48、 standardization activities to progress in parallel. Figure 1 makes extensive use of colour to group related aspects of service delivery. Service delivery and control are represented by components and are intended to collate related control functions. Complex services are supported in the NGN by com
49、mon application support functions. The components are related to each other and may contain common or shared functionality. No assumptions are made concerning their representation as separate components in the figure. SIP-controlled services including the control and delivery of real-time conversational services are provided by the IP multimedia component (orange) based on the re-use of the IMS. The IMS is extended in the NGN to support additional access network types (mid-green)
