1、- INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.1702 SERIES Q: SWITCHING AND SIGNALLING Signalling requirements and protocols for IMT-2000 (06/2002) Long-term vision of network aspects for systems beyond IMT-2000 ITU-T Recommendation Q. 1702 JTU-T Q-SE
2、RIES RECOMMENDATIONS SWITCEING AND SIGNALLING c SIGNALLING IN THE INTERNATIONAL MANUAT, SERVICE FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN SPECIFICATIONS OF SIGNALLING SYSTEM No. 4 SPECIFICATIONS OF SIGNALLING SYSTEM No. 5 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIG
3、NALLING SYSTEM R1 SPECIFICATIONS OF SIGNALLING SYSTEM R2 INTERWORKING OF SIGNALLING SYSTEMS SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 Q3 INTERFACE DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLITE MOBILE SYSTEMS INTELLIGENT NETWORK SPECIFICATIONS OF SI
4、GNALLING RELATED TO BEARER INDEPENDENT CALL CONTROL (BICC) BROADBAND ISDN INTERNATIONAL AUTOMATIC AND SEMI-AUTOMATIC WORKING CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS 1 DIGITAL EXCHANGES SIGNALLING REQUIREMENTS AND PROTOCOLS FOR EW“-2000 Q.1-Q.3 Q.4-Q.59 Q.6O-Q.99 Q.lOO-Q.119 Q. 120-4.139 Q.140-Q
5、. 199 Q.250-Q.309 Q.310-Q.399 Q.400-Q.499 Q.500-Q.599 4.600-4.699 Q.700-Q.799 Q.800-Q.849 Q.850-Q.999 Q.lOOO-Q.1099 Q. 1100-Q. 1199 Q. 1200-Q. 1699 Q.170-Q.1799 Q.190O-Q.1999 Q.200O-Q.2999 For further details, please refer to the list of ITU-TRecommendations. WU-T Recommendation Q.1702 Long-term vis
6、ion of network aspects for systems beyond IMT-2000 Summary This Recommendation addresses the envisaged network environment, network design objectives, and architecture concepts of Systems Beyond IMT-2000. This Recommendation, together with a draft ITU-R Recommendation which covers the radio aspects,
7、 form the ITU long-term vision for Systems Beyond IMT-2000. Source ITU-T Recommendation 4.1702 was prepared by ITU-T SSG (2001-2004) and approved under the WTSA Resolution 1 procedure on 29 June 2002. Keywords Long-Term Vision, Network Aspects, Systems Beyond IMT-2000 ITU-T Rec. Q.1702 (0612002) 1 F
8、OREWORD 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 responsible for studying technical, operating and tariff questions and i
9、ssuing 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 ITU-T study groups which, in turn, produce Recommendations on these
10、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 collaborative basis with IS0 and IEC. NOTE In this Recommendation, the express
11、ion “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL, PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intelle
12、ctual 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 Recommendation development process. As of the date of approval of this Recommendation, ITU had not received
13、 notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. O ITU 2002 All rights reserved.
14、No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. 11 ITU-T Rec. Q.1702 (06/2002) CONTENTS Page 1 Scope 2 References . 3 Definitions 4 Abbreviations 5 Envisaged network environment around the year 20 1 O . 5.1 Market trends 5.2 Techno
15、logy trends 6 Key long-term network design objectives 6.1 6.2 6.3 Security support 6.4 User platform support . 6.5 6.6 System flexibility Broadband and multiple bearer service capability . Service expandability and application service support High performance and system efficiency . 6.7 System scala
16、bility . 6.8 System interoperability . 6.9 System robustness . 7 Long-term network architecture concepts ITU-T Rec . Q.1702 (06/2002) 1 1 1 2 2 2 3 3 3 4 4 4 4 4 6 6 6 6 . 111 Introduction The ITU-T and ITU-R have collaborated to develop a single ITU vision of Systems Beyond IMT-2000 targeted for in
17、itial deployment around the year 20 10, subject to market considerations. This common ITU Vision is the nucleus and foundation for the development of related Recommendations in both the Telecommunication Standardization Sector and the Radiocommunication Sector. This relationship is responsive to ITU
18、-T Resolution 3 8 and ITU-R Resolution 50 which require the development of roadmaps on IMT-2000 in an independent, but well-coordinated manner. There is a definite trend towards integration of access networks (e.g., cellular, wireless local area network, personal area wireless network, satellite sys
19、tems, and Internet.) Based on this trend, it is envisioned that the network environment of Systems Beyond IMT-2000 will consist of packet- based network infrastructure offering a plethora of converged services. iv ITU-T Rec. Q.1702 (06/2002) ITU-T Recommendation Q.1702 Long-term vision of network as
20、pects for systems beyond IMT-2000 1 Scope The scope of this Recommendation is to provide a long-term vision (around the year 2010) for the network aspects of Systems Beyond IMT-2000. The further development of existing IMT-2000 systems is not addressed by this Recommendation. 2 References The follow
21、ing ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute 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 Recomm
22、endation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. i ITU-T Recommendation X.233 (1997) Information technology - Prot
23、ocol for providing the connectionless-mode network service: Protocol specijcation. 2 ITU-T Recommendation I. 1 13 (1997) Vocabulary of terms for broadband aspects ofISDN. 3 ITU-T Recommendation H.323 (2000) Packet-based multimedia communications systems. 4 ITU-R Recommendation M.687-2 (1997) Interna
24、tional Mobile Telecommunications-2000 (IA4T-2000). 5 ITU-R Recommendation M. 13 1 1 (1 997) Framework for modularity and radio commonality within IMT-2000. 3 Definitions This Recommendation defines the following terms: 3.1 converged services: The integration of Internet, multimedia, e-mail, presence
25、, instant messaging, m-commerce, etc., services with voice service. 3.2 mobility: The ability to provide services irrespective of changes that may occur by userhenninal?s activities. 3.3 multicast: Data transmission to one or more destinations in a selected group in a single service invocation. i 3.
26、4 multimedia: The combination of multiple forms of media such as audio, video, text, graphics, fax, and telephony in the communication of information. 3.5 multimedia service: A service in which the interchanged information consists of more than one type, such as text, graphics, sound, image and vide
27、o. 21 3.6 seamless service: Seamless Service will prevent users from experiencing any service disruptions while maintaining mobility or portability. 3.7 session continuity: The ability of the user to maintain continuity of ongoing sessions while changing between terminal devices and across various a
28、ccess and core networks. For example, the user of a mobile terminal may wish to switch from his mobile equipment attached to a wireless network to a laptop connected to a wire-line or Digital Subscriber Line connection. This should be ITU-T Rec. Q.1702 (06/2002) 1 supported without any session disco
29、ntinuity. 3.8 3.9 located complex systems in real-time. unicast: A process of transmitting messages from one source to one destination. 3 virtual reality services: The ability for users to access the sights and sounds of remotely 4 Abbreviations Thsi Recomendation uses the following abbreviations: A
30、PI ASP IMT IP MbPS OAM Paging. - Routing Management: Handover. - Session Continuity: Seamless Session Transfer; Diversity Handover across access and core networks; Having a flexible, efficient, and integrated mobility management, i.e., flexibility to support advanced mobility management. Support an
31、efficient and adaptive combination of location registration and IP paging functions. Support dynamic network capacity changes. - - ITU-T Rec. 4.1702 (06/2002) 5 6.7 System scalability Systems Beyond IMT-2000 are expected to handle very large amounts of multimedia traffic to/from a large number of mo
32、bile users. The multimedia applications run by the mobile users will have diverse traffic and performance/QoS requirements. Advanced mobility management techniques are needed to handle the QoS requirements (e.g., satissling QoS requirements of a mobile application during a sequence of handovers.) Th
33、e system must also take into consideration all the access technology choices the user may have in a particular network environment. Advanced mobility management schemes are needed to handle multicast and broadcast requirements of geographically dispersed mobile multimedia users. 6.8 System interoper
34、ability o Support global standards, e.g., standardized interfaces between networks. Effective and user-friendly Operations, Administration, Maintenance and Provisioning Interoperability with existing third generation mobile networks. Interoperability in this case Integratiodinter-operation with alte
35、rnative networks, e.g., a Personal Access Network o (OAM Modular construction using expandable components; and Open interfaces between various systems. o o An IP-based network concept is likely to be used for future development and standardization efforts. The high-level architecture of Systems Beyo
36、nd IMT-2000 may be envisaged to include user platform, IP-based network platform, and service provisionicg platform. The IP-based network platform includes two types of components: access network components and core network components. The user platform allows a user to gain access to services in co
37、njunction with the access and core networks. User platform can be subdivided into a number of components. Access network components are access technology dependent. They include multiple wireless and wire-line access technologies. Core network components are access technology independent. They 6 ITU
38、-T Rec. Q.1702 (06/2002) include functional components such as control functions and transport functions. It is anticipated that radio access components of Systems Beyond IMT-2000 can dynamically support various radio transmission requirements. In addition to these radio access components, other acc
39、ess components to provide interconnection with other fixed networks are also needed in the IP-based network platform. 5 Core network components will provide control functions and transport functions. It is envisaged that a service provisioning mechanism that can dynamically provide user-defined comb
40、ined multiple media services at a session level is needed. The service provisioning platform supports such a multiple service combination capability. Service provisioning mechanisms in Systems Beyond IMT-2000 are envisaged to become more flexible in a multi-stage distributed manner. Such a distribut
41、ed service provisioning platform is expected to help explore the network service potential of Systems Beyond IMT-2000. ITU-T Rec. Q.1702 (06/2002) 7 SERIES OF ITU-T RECOMMENDATIONS Series A Series B Series C Series D Series E Series F Series G Series H Series I Series J Series K Series L Series M Se
42、ries N Series O Series P Series Q Series R Series S Series T Series U Series V Series X Series Y Series Z Organization of the work of ITU-T Means of expression: deftions, symbols, classification General telecommunication statistics General tariff principles Overall network operation, telephone servi
43、ce, service operation and human factors Non-telephone telecommunication services Transmission systems and media, digital systems and networks Audiovisual and multimedia systems Integrated services digital network Cable networks and transmission of television, sound programme and other multimedia sig
44、nals Protection against interference Construction, installation and protection of cables and other elements of outside plant TMN and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Maintenance: international sound programme and t
45、elevision transmission circuits Specifications of measuring equipment Telephone transmission quality, telephone installations, local line networks Switching and signalling Telegraph transmission Telegraph services terminal equipment Terminals for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communications Global information infiastructure and Internet protocol aspects Languages and general software aspects for telecommunication systems Printed in Switzerland Geneva, 2002
