ITU-T Y.1541-2006 Network performance objectives for IP-based services Study Group 12

pdf标准 ITU-T Y.1541-2006 Network performance objectives for IP-based services Study Group 12

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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.1541 (02/2006) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Internet protocol aspects – Quality of service and network performance Network performance objectives for IP-based services ITU-T Recommendation Y.1541 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 ITU-T Recommendation Y.1541 Network performance objectives for IP-based services Summary This Recommendation defines classes of network Quality of Service (QoS) with objectives for Internet Protocol network performance parameters. Two of the classes contain provisional performance objectives. These classes are intended to be the basis for agreements among network providers, and between end users and their network providers. Appendix I provides information about how ATM might support IP layer performance. Appendix II discusses alternatives for defining IP delay variation. Appendix III presents the Hypothetical Reference Paths against which the Y.1541 QoS objectives were tested for feasibility. Appendix IV gives example computations of packet delay variation. Appendix V discusses issues that must be considered whenever IP measurements are made. Appendix VI describes the relationship between this Recommendation and the IETF-defined mechanisms for managing QoS. Appendix VII gives estimates of speech transmission quality for the Hypothetical Reference Paths of Appendix III. Appendix VIII discusses digital television transport on IP Networks. Appendix IX estimates TCP file transfer performance on paths conforming to Y.1541 objectives. Source ITU-T Recommendation Y.1541 was approved on 22 February 2006 by ITU-T Study Group 12 (2005-2008) under the ITU-T Recommendation A.8 procedure. ITU-T Rec. Y.1541 (02/2006) i 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 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 attent

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