ITU-T Y.2111-2008 Resource and admission control functions in next generation networks Study Group 13

pdf标准 ITU-T Y.2111-2008 Resource and admission control functions in next generation networks Study Group 13

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I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU U n i o n Y.2111 (11/2008) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Next Generation Networks – Quality of Service and performance Resource and admission control functions in next generation networks Recommendation ITU-T Y.2111 ITU-T Y-SERIES RECOMMENDATIONS GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXTGENERATION NETWORKS GLOBAL INFORMATION INFRASTRUCTURE General Services, applications and middleware Network aspects Interfaces and protocols Numbering, addressing and naming Operation, administration and maintenance Security Performances INTERNET PROTOCOL ASPECTS General Services and applications Architecture, access, network capabilities and resource management Transport Interworking Quality of service and network performance Signalling Operation, administration and maintenance Charging NEXT GENERATION NETWORKS Frameworks and functional architecture models Quality of Service and performance Service aspects: Service capabilities and service architecture Service aspects: Interoperability of services and networks in NGN Numbering, naming and addressing Network management Network control architectures and protocols Security Generalized mobility For further details, please refer to the list of ITU-T Recommendations. Y.100–Y.199 Y.200–Y.299 Y.300–Y.399 Y.400–Y.499 Y.500–Y.599 Y.600–Y.699 Y.700–Y.799 Y.800–Y.899 Y.1000–Y.1099 Y.1100–Y.1199 Y.1200–Y.1299 Y.1300–Y.1399 Y.1400–Y.1499 Y.1500–Y.1599 Y.1600–Y.1699 Y.1700–Y.1799 Y.1800–Y.1899 Y.2000–Y.2099 Y.2100–Y.2199 Y.2200–Y.2249 Y.2250–Y.2299 Y.2300–Y.2399 Y.2400–Y.2499 Y.2500–Y.2599 Y.2700–Y.2799 Y.2800–Y.2899 Recommendation ITU-T Y.2111 Resource and admission control functions in next generation networks Summary Recommendation ITU-T Y.2111 specifies the functional architecture and requirements for the resource and admission control functions in next generation networks, which may involve a variety of access and core transport technologies and multiple domains. The RACF provides real-time application-driven and policy-based transport resource management in support of end-to-end quality of service (QoS), gate control, network address translation, and traversal of remote network address translators. The RACF is not service-specific. Services can make use of RACF whether the IP multimedia subsystem is involved or not. In particular, this edition includes extensions to Recommendation ITU-T Y.2111 (2006) to address issues related to multicast in support of IPTV services, nomadicity, and interactions between CPE/CPN and RACF. Source Recommendation ITU-T Y.2111 was approved on 13 November 2008 by ITU-T Study Group 13 (2009-2012) under Recommendation ITU-T A.8 procedure. Rec. ITU-T Y.2111 (11/2008) i 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 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 years, 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-T's purview, the necessary standards are prepared on a collaborative 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 mandatory 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. The 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 takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether a

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