1、 International Telecommunication Union ITU-T Y.2173TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (09/2008) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Next Generation Networks Quality of Service and performance Management of performance measu
2、rement for NGN Recommendation ITU-T Y.2173 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 Interfa
3、ces 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 applications Y.1100Y.1199 Architecture, access, network capabilities a
4、nd 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.1899 NEXT GENERATION NETWORKS Frameworks and functional archite
5、cture models Y.2000Y.2099 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.2400
6、Y.2499 Network control 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. Rec. ITU-T Y.2173 (09/2008) i Recommendation ITU-T Y.2173 Management of performance measurement for NGN Summ
7、ary Recommendation ITU-T Y.2173 specifies requirements, reference measurement network model, high-level and functional architectures, and procedures for performance measurement management. This Recommendation together with Recommendation ITU-T Y.1543 provides overall consistency for performance meas
8、urement and management of NGN. Source Recommendation ITU-T Y.2173 was approved on 12 September 2008 by ITU-T Study Group 13 (2005-2008) under Recommendation ITU-T A.8 procedures. ii Rec. ITU-T Y.2173 (09/2008) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized
9、 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
10、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 Recommen
11、dations 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 “Administration“ is used for conci
12、seness 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 Recommendat
13、ion 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. I
14、NTELLECTUAL 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
15、, 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 Recommendation. However, implementers
16、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 rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permis
17、sion of ITU. Rec. ITU-T Y.2173 (09/2008) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 2 4 Abbreviations and acronyms 2 5 Conventions 4 6 Requirements 4 6.1 High-level requirements . 4 6.2 Functional requirements . 4 6.3 Non-functional requirements 5 7 Reference measurement network model
18、 for performance management 5 7.1 General reference network model 5 7.2 Principles of network partitioning 6 7.3 Network partitioning 7 8 Management architecture for performance measurement 11 8.1 Relationship with NGN management architecture and management processes. 11 8.2 General architecture 12
19、8.3 Functional architecture . 13 8.4 Reference points . 14 9 Procedures 16 9.1 Discovery 17 9.2 Initiation of measurements . 18 9.3 Communications among registry and PMR-FEs 20 9.4 Timing requirements of procedures 29 10 Security consideration and requirements 30 10.1 Potential threats and attacks .
20、 30 10.2 Security impact on measurement performance 31 10.3 Scope consideration 31 10.4 Security requirements. 32 Appendix I Application scenario 1: Performance degradation resolution information reporting and network partitioning example. 35 Appendix II Application scenario 2: RTP/RTCP-based perfor
21、mance notification 38 II.1 Introduction 38 II.2 Performance notification 38 II.3 Implementation example of the RTP/RTCP-based performance notification 39 II.4 Multiplication scheme for RTCP report notification 42 iv Rec. ITU-T Y.2173 (09/2008) Page Appendix III Example realization for the management
22、 of NGN performance measurement. 44 III.1 Performance reporting systems 44 III.2 Collection platforms . 45 III.3 Measurement points 46 III.4 Customer terminal equipment 46 Appendix IV Management consideration for performance measurement 47 IV.1 Architectural considerations. 47 IV.2 Discovery conside
23、rations 50 IV.3 Messaging considerations. 51 IV.4 Data handling considerations . 51 IV.5 ECMP consideration for active measurement 54 IV.6 Performance degradation resolution among multiple NGN service providers. 55 Bibliography. 56 Rec. ITU-T Y.2173 (09/2008) 1 Recommendation ITU-T Y.2173 Management
24、 of performance measurement for NGN 1 Scope This Recommendation specifies the management aspects of performance measurement. Its scope is as follows: Requirements for management of performance measurement. A reference measurement network model as an extension of clause 8 of ITU-T Y.1543, which allow
25、s for various measurement scenarios for NGN. A general and functional architecture for the management of performance measurement and the related stage-2 requirements. Management procedures covering various management scenarios such as discovery of measurement entities, initiation of measurement and
26、exchange of measurement data among different NGN domains. Application scenarios for management of performance measurement (MPM) use cases such as procedures for performance measurements, degradation resolution and RTP/RTCP-based performance notification. Note that the pertinent protocol specificatio
27、ns for reference points and procedures are expected to be described in separate Recommendations. This Recommendation also describes the following MPM use cases: 1) Performance degradation resolution information reporting. 2) RTP/RTCP-based performance notification. 2 References The following ITU-T R
28、ecommendations 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 Recommendation ar
29、e 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. The reference to a document within this Recommendation does not give it, as
30、a stand-alone document, the status of a Recommendation. ITU-T M.3050.x Recommendation ITU-T M.3050.x-series (in force), Enhanced Telecom Operations Map (eTOM). ITU-T M.3060 Recommendation ITU-T M.3060/Y.2401 (in force), Principles for the Management of the Next Generation Networks. ITU-T O.211 Recom
31、mendation ITU-T O.211 (in force), Test and measurement equipment to perform tests at the IP layer. ITU-T X.805 Recommendation ITU-T X.805 (in force), Security architecture for systems providing end-to-end communications. 2 Rec. ITU-T Y.2173 (09/2008) ITU-T Y.1540 Recommendation ITU-T Y.1540 (in forc
32、e), Internet protocol data communication service IP packet transfer and availability performance parameters. ITU-T Y.1541 Recommendation ITU-T Y.1541 (in force), Network performance objectives for IP-based services. ITU-T Y.1543 Recommendation ITU-T Y.1543 (in force), Measurements in IP networks for
33、 inter-domain performance assessment. ITU-T Y.2012 Recommendation ITU-T Y.2012 (in force), Functional requirements and architecture of the NGN release 1. ITU-T Y.2701 Recommendation ITU-T Y.2701 (in force), Security requirements for NGN release 1. 3 Definitions This Recommendation defines the follow
34、ing terms: 3.1 active measurement: A method of measuring performance on a network by injecting specially marked test packets into the network. 3.2 measurement point: A point in the network containing functionality that may initiate or respond to measurements. NOTE Measurement point may perform eithe
35、r active or passive measurement. It is located at peering points, demarcation points, provider edges, customer edges and customer premises equipment. 3.3 OAM-based passive performance measurement: A general OAM-based performance measurement mechanism which can be applied in a similar way for any pac
36、ket-based transport technology such as MPLS OAM and Ethernet OAM. 3.4 passive measurement: A method of observing user data packets on a network link non-intrusively. 3.5 spatial measurement: A measurement that involves collection of performance data at one or more measurement points that are not mea
37、surement endpoints. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: ABG Access Border Gateway AN Access Network ANE Access Network Edge AS Autonomous System BPS Bytes Per Second CNE Core Network Edge CoS Class of Service CPE Customer Premises Equipment
38、 Rec. ITU-T Y.2173 (09/2008) 3 CPN Customer Premises Network CPNE Customer Premises Network Edge DLSR Delay since Last Sender Report DNS-ALG Domain Name System Application Level Gateway DoS Denial of Service DP Demarcation Point DSL Digital Subscriber Line ECMP Equal Cost Multi-Path EN Edge Network
39、FCAPS Fault, Configuration, Accounting, Performance and Security Management FPS Flow Per Second FSD Flow Summary Data GPS Global Positioning System IBG Interconnection Border Gateway IPDV Internet Protocol Packet Delay Variation IPFIX Internet Protocol Flow Information eXport IPLR Internet Protocol
40、Packet Loss Ratio IPPM Internet Protocol Packet Performance Metrics IPPMS Internet Protocol Performance Measurement Signature IPTD Internet Protocol Packet Transfer Delay IPUA Internet Protocol UnAvailability LAN Local Area Network LSR Last Sender Report LT Line Termination MPLS MultiProtocol Label
41、Switching MPM Management of Performance Measurement NAPT Network Address Port Translation NAT Network Address Translation NAT-PT Network Address Translation Protocol Translation NT Network Termination NTP Network Time Protocol OAM Operations, Administration and Maintenance PME-FE Performance Measure
42、ment Execution Functional Entity PMP-FE Performance Measurement Processing Functional Entity PMR-FE Performance Measurement Reporting Functional Entity PPS Packet Per Second RACF Resource and Admission Control Functions 4 Rec. ITU-T Y.2173 (09/2008) RTCP Real-time Transport Control Protocol RTP Real
43、-time Transport Protocol RTT Round-Trip Time SCF Service Control Function SLA Service Level Agreement SPE Service Provider Edge SSRC Synchronization Source TE Terminal Equipment UDDI Universal Description, Discovery and Integration VoIP Voice over Internet Protocol 5 Conventions None. 6 Requirements
44、 6.1 High-level requirements This clause provides the high-level requirements on management of performance measurement for NGN networks and services. Additional information related to these requirements is provided in Appendix III. The requirements, all mandatory, are as follows: 1) Support inter-do
45、main performance measurement. 2) Enable inter-domain performance measurement functional entities to discover each other. 3) Enable distribution of measured performance data from one domain to another. 4) Enable aggregation of measured performance data from different domains. 5) Enable management of
46、performance measurement in a NAT/NAPT environment. 6) Enable management of performance measurement in a NAT-PT environment. 7) Enable management of performance measurement in an ECMP environment. 8) Enable identification of performance degradation problems based on performance measurements in a mult
47、i-domain environment. 6.2 Functional requirements This clause describes the functional requirements on management of performance measurement for next-generation networks and services. The performance measurement management architecture is required to: 1) Be distributed; and the distributed architect
48、ure may be federated, hierarchical, or cascading neighbour. 2) Enable the partitioning of networks to provide accurate end-to-end measurement, and support comparison of measurement with provider impairment targets. 3) Support a common information model for storing the measured data for the managemen
49、t of inter-domain performance measurement. Rec. ITU-T Y.2173 (09/2008) 5 4) Support a reference point for exchanging the measured data for the management of inter-domain performance measurement. 5) Support configuration and monitoring measurement entities. 6) Support control measurement entities. 7) Enable collection, aggregation and storage of measurements. 8) Support management of the collection of measurement data. 9) Support derivation of performance metrics from measured data. 10) Support of exchange of perform
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