1、 International Telecommunication Union ITU-T Y.2024TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (07/2012) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Next Generation Networks Frameworks and functional architecture models Functional requireme
2、nts and architecture of the web service component in next generation networks Recommendation ITU-T Y.2024 ITU-T Y-SERIES RECOMMENDATIONS GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS GLOBAL INFORMATION INFRASTRUCTURE General Y.100Y.199 Services, applicatio
3、ns and middleware Y.200Y.299 Network 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 applica
4、tions Y.1100Y.1199 Architecture, access, 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.
5、1899 IPTV over NGN Y.1900Y.1999 NEXT GENERATION NETWORKS Frameworks and functional architecture models Y.2000Y.2099Quality 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
6、 NGN Y.2250Y.2299 Numbering, naming and addressing Y.2300Y.2399 Network management Y.2400Y.2499 Network control architectures and protocols Y.2500Y.2599 Packet-based Networks Y.2600Y.2699 Security Y.2700Y.2799 Generalized mobility Y.2800Y.2899 Carrier grade open environment Y.2900Y.2999 FUTURE NETWO
7、RKS Y.3000Y.3499 CLOUD COMPUTING Y.3500Y.3999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T Y.2024 (07/2012) i Recommendation ITU-T Y.2024 Functional requirements and architecture of the web service component in next generation networks Summary Recommendation ITU
8、-T Y.2024 provides the functional requirements and architecture of the web service component using web technologies in next generation networks (NGNs). The web service component in NGN basically supports legacy web services and converged NGN services through the interworking with the internet protoc
9、ol (IP) multimedia service component and/or the internet protocol television (IPTV) services component. History Edition Recommendation Approval Study Group 1.0 ITU-T Y.2024 2012-07-29 13 Keywords NGN, web. ii Rec. ITU-T Y.2024 (07/2012) FOREWORD The International Telecommunication Union (ITU) is the
10、 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 responsible for studying technical, operating and tariff questions and issuing Reco
11、mmendations 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 topics. The
12、 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 ISO and IEC. NOTE In this Recommendation, the expression “Admini
13、stration“ 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 mandatory provisions (to ensure, e.g., interoperability or applicability) and com
14、pliance 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. The use of such words does not suggest that compliance with the Recommendation
15、 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 takes no position concerning the evidence, validity or applicability of claimed
16、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 property, protected by patents, which may be required to implement this Recommenda
17、tion. 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 2013 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, with
18、out the prior written permission of ITU. Rec. ITU-T Y.2024 (07/2012) iii Table of Contents Page 1 Scope 1 2 References. 1 3 Definitions 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronyms 3 5 Conventions 4 6 Overview of the web service component
19、in NGN 4 6.1 Web service component . 4 6.2 Service classification using the web service component 5 7 Requirements for the web service component in NGN 6 8 Functional architecture of the web service component 6 8.1 High-level NGN architecture with the web service component . 6 8.2 Functional entitie
20、s for the web service component 8 9 Interworking between the web service component and other service components 10 9.1 Interactions for the support of legacy web services . 10 9.2 Interactions for the support of web-based conversation services . 10 9.3 Interactions for the support of web-based strea
21、ming services 11 10 Security considerations . 11 Appendix I Relationship among NGN service specific components with the web service component in the NGN architecture . 12 Appendix II Relationship of web service component functions with other NGN functions . 13 II.1 Relationship between ITU-T Y.2235
22、and ITU-T Y.2024 13 II.2 Related functions for the web service in NGN . 13 Appendix III Information flows for services using the web service component in NGN 15 III.1 Procedure for the support of legacy web services 15 III.2 Procedure for the support of web-based conversation services 16 III.3 Proce
23、dure for the support of web-based streaming services 17 Appendix IV IETF activities related to the web service component in NGN 19 IV.1 IETF real-time communication in web-browsers (RTCWeb) 19 Bibliography. 21 Rec. ITU-T Y.2024 (07/2012) 1 Recommendation ITU-T Y.2024 Functional requirements and arch
24、itecture of the web service component in next generation networks 1 Scope The objective of this Recommendation is to describe the functional requirements and architecture of the web service component in NGN using web technologies (e.g., HTML, HTTP, XML, SOAP, REST). The web service component in NGN
25、basically supports legacy web services (e.g., web-browsing, e-mail, blogging, web-office services) and converged NGN services such as web-based conversational services through the interworking with the IP multimedia service component and/or web-based multimedia streaming service through the interwor
26、king with the IPTV services component. The scope of this Recommendation includes: overview of the web service component in the support of legacy web services and converged NGN services; requirements for the web service component in NGN; functional architecture for the web service component in NGN; i
27、nterworking between web service component and other service components. This Recommendation mainly focuses on service control and content delivery functions in the service stratum of NGN. Details of web technologies are out of the scope. 2 References The following ITU-T Recommendations and other ref
28、erences 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 Recommendation are therefore encouraged to in
29、vestigate 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. The reference to a document within this Recommendation does not give it, as a stand-alone document, the
30、status of a Recommendation. ITU-T Y.101 Recommendation ITU-T Y.101 (2000), Global Information Infrastructure terminology: Terms and definitions. ITU-T Y.1901 Recommendation ITU-T Y.1901 (2009), Requirements for the support of IPTV services. ITU-T Y.1910 Recommendation ITU-T Y.1910 (2008), IPTV funct
31、ional architecture. ITU-T Y.2011 Recommendation ITU-T Y.2011 (2004), General principles and general reference model for Next Generation Networks. ITU-T Y.2012 Recommendation ITU-T Y.2012 (2010), Functional requirements and architecture of next generation networks. ITU-T Y.2021 Recommendation ITU-T Y
32、.2021 (2006), IMS for Next Generation Networks. ITU-T Y.2031 Recommendation ITU-T Y.2031 (2006), PSTN/ISDN emulation architecture. ITU-T Y.2091 Recommendation ITU-T Y.2091 (2008), Terms and definitions for Next Generation Networks. 2 Rec. ITU-T Y.2024 (07/2012) ITU-T Y.2201 Recommendation ITU-T Y.22
33、01 (2009), Requirements and capabilities for ITU-T NGN. ITU-T Y.2232 Recommendation ITU-T Y.2232 (2008), NGN convergence service model and scenario using web services. ITU-T Y.2235 Recommendation ITU-T Y.2235 (2008), Converged web-browsing service scenarios in NGN. ITU-T Y.2701 Recommendation ITU-T
34、Y.2701 (2007), Security requirements for NGN release 1. ITU-T Y.2702 Recommendation ITU-T Y.2702 (2008), Authentication and authorization requirements for NGN release 1. 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 application ITU-T
35、Y.101: A structured set of capabilities, which provide value-added functionality supported by one or more services. 3.1.2 functional architecture ITU-T Y.2012: A set of functional entities and the reference points between them used to describe the structure of an NGN. These functional entities are s
36、eparated by reference points, and thus, they define the distribution of functions. NOTE The functional entities can be used to describe a set of reference configurations. These reference configurations identify which reference points are visible at the boundaries of equipment implementations and bet
37、ween administrative domains. 3.1.3 functional entity ITU-T Y.2012: An entity that comprises an indivisible set of specific functions. Functional entities are logical concepts, while groupings of functional entities are used to describe practical, physical implementations. 3.1.4 internet protocol tel
38、evision (IPTV) ITU-T Y.1901: Multimedia services such as television/video/ audio/text/graphics/data delivered over IP-based networks managed to support the required level of QoS/QoE, security, interactivity and reliability. 3.1.5 NGN service stratum ITU-T Y.2011: That part of the NGN which provides
39、the user functions that transfer service-related data and the functions that control and manage service resources and network services to enable user services and applications (see also clause 7.1 of ITU-T Y.2011). 3.1.6 NGN transport stratum ITU-T Y.2011: That part of the NGN which provides the use
40、r functions that transfer data and the functions that control and manage transport resources to carry such data between terminating entities (see also clause 7.1 of ITU-T Y.2011). 3.1.7 service ITU-T Y.2091: A set of functions and facilities offered to a user by a provider. 3.1.8 web service ITU-T Y
41、.2232: A service provided using web services systems. 3.2 Terms defined in this Recommendation None. Rec. ITU-T Y.2024 (07/2012) 3 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: API Application Programming Interface APL-GW-FE Application Gateway Funct
42、ional Entity APL-SCM-FE Application Service Coordination Manager Functional Entity AS-FE Application Support Functional Entity CSCF Call Session Control Function FE Functional Entity FTP File Transfer Protocol HTML Hyper Text Mark-up Language HTTP Hyper Text Transfer Protocol IETF Internet Engineeri
43、ng Task Force IMS IP Multimedia Subsystem ISDN Integrated Services Digital Network MMoIP Multimedia over IP MRB-FE Media Resource Broker Functional Entity MRC-FE Media Resource Control Functional Entity NACF Network Attachment Control Function NGN Next Generation Network NSIW-FE Network Signalling I
44、nterworking Functional Entity PC Personal Computer PCC-FE Policy and Charging Control Functional Entity PDF Policy Decision Function PSTN Public Switched Telephone Network PWC-FE Proxy Web Control Functional Entity QoS Quality of Service RACF Resource Admission Control Function REST Representational
45、 State Transfer RTCWEB Real-Time Communication in WEB-browsers RTSP Real Time Streaming Protocol SAA-FE Service Authentication and Authorization Functional Entity SCIM Service Capability Interaction Manager SIP Session Initiation Protocol SL-FE Subscription Locator Functional Entity SOAP Simple Obje
46、ct Access Protocol SUP-FE Service User Profile Functional Entity USIW-FE User Signalling Interworking Functional Entity 4 Rec. ITU-T Y.2024 (07/2012) WMF Web Media Function WMGC-FE Web Media Gateway Control Functional Entity WMRC-FE Web Media Resources Control Functional Entity WMT-FE Web Media Tran
47、sform Functional Entity WSCF Web Service Control Function WSDL Web Service Definition Language WSGC-FE Web Signalling Gateway Control Functional Entity XML Extensible Mark-up Language 5 Conventions In this Recommendation: The keywords “is required to“ indicate a requirement which must be strictly fo
48、llowed and from which no deviation is permitted, if conformance to this Recommendation is to be claimed. The keywords “is prohibited from“ indicate a requirement which must be strictly followed and from which no deviation is permitted, if conformance to this Recommendation is to be claimed. The keyw
49、ords “is recommended“ indicate a requirement which is recommended but which is not absolutely required. Thus, this requirement need not be present to claim conformance. The keywords “is not recommended“ indicate a requirement which is not recommended but which is not specifically prohibited. Thus, conformance with this Recommendation can still be claimed even if this requirement is present. The keywords “can optionally“ indicate an optional requirement which is p
