ETSI TS 185 001-2005 Telecommunication and Internet converged Services and Protocols for Advanced Networking (TISPAN) Next Generation Network (NGN) Quality of Service (QoS) Framewo.pdf

1、 ETSI TS 185 001 V1.1.1 (2005-11)Technical Specification Telecommunication and Internet converged Servicesand Protocols for Advanced Networking (TISPAN);Next Generation Network (NGN);Quality of Service (QoS) Framework and RequirementsETSI ETSI TS 185 001 V1.1.1 (2005-11) 2 Reference DTS/TISPAN-05008

2、-NGN Keywords QoS, quality ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies of

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6、uthorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2005. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTMand t

7、he TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI TS 185 001 V1.1.1 (2005-11) 3 Contents Intellectual Property Rights5 Foreword.

8、5 1 Scope 6 2 References 6 3 Definitions and abbreviations.7 3.1 Definitions7 3.2 Abbreviations .7 4 Introduction 8 5 QoS Generic concepts 8 5.1 QoS and Network Performance8 5.2 Performance objectives 8 5.3 End-to-end and bearer QoS 8 5.4 Guaranteed and relative QoS9 6 QoS Framework Model9 6.1 Frame

9、work Model 9 6.1.1 Processes.10 6.1.2 Levels10 6.2 Application to QoS.11 7 NGN QoS Requirements12 8 QoS Classes13 8.1 ITU-T Recommendation Y.1541 QoS Classes.13 8.2 TS 123 107 QoS Classes 14 8.3 Mapping between ITU-T (Y.1541) and 3GPP (TS 123 107) QoS Classes 14 8.3.1 Context14 8.3.2 Hypothesis 15 8

10、.3.3 Y.1541 to TS 123 107.15 8.3.4. TS 123 107 to Y.1541.15 8.3.5 Limitations18 9 Codecs 18 10 QoS Scenarios 18 10.1 Scenario 1 - Proxied QoS with policy-push .19 10.2 Scenario 2 - User-requested QoS with policy-push-pull 20 10.3 Scenario 3 - User-requested QoS with policy-pull .20 11 QoS Architectu

11、re Requirements.21 11.1 Architectural requirements .21 11.2 QoS architecture.22 12 QoS Signalling Requirements 23 12.1 QoS Signalling Requirements in Call/Connection Control Reference Point23 12.2 QoS Signalling Requirements in Network Control Reference Point24 12.3 QoS Signalling Requirements in Sw

12、itch Control Reference Point.24 Annex A (informative): List of Audio and Video Codecs for conversational applications25 A.1 Audio Narrow Band (300 Hz to 3 400 Hz) 26 A.2 Audio Wide Band (50 Hz to 7 000 Hz)27 A.3 Audio Narrow and WideBand28 A.4 Foreseen extensions of existing Codecs (new Annexes unde

13、r standardization in ITU-T).28 ETSI ETSI TS 185 001 V1.1.1 (2005-11) 4 A.5 Video 29 History 30 ETSI ETSI TS 185 001 V1.1.1 (2005-11) 5 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these esse

14、ntial IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest update

15、s are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the E

16、TSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by ETSI Technical Committee Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN). ETSI ETSI TS 185 001 V1.

17、1.1 (2005-11) 6 1 Scope The present document provides a set of generic QoS concepts for NGN, provides a QoS Framework Model and describes the requirements for the delivery of QoS in TISPAN NGN. The present document is release independent. 2 References The following documents contain provisions which

18、, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the

19、latest version applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. 1 ITU-T Recommendation G.1000 (2001): “Communications Quality of Service: A framework and definitions“. 2 ITU-T Recommendation G.1010

20、(2001): “End-user multimedia QoS categories“. 3 ITU-T Recommendation M.2301 (2002): “Performance objectives and procedures for provisioning and maintenance of IP-based networks“. 4 ITU-T Recommendation Y.1540 (2002): “Internet protocol data communication service - IP packet transfer and availability

21、 performance parameters“. 5 ITU-T Recommendation Y.1541 (2002): “Network performance objectives for IP-based services“. 6 ETSI TS 123 107: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Quality of Service (QoS) concept and architecture (3GP

22、P TS 23.107 Release 6)“. 7 ITU-T Recommendation G.711: “Pulse code modulation (PCM) of voice frequencies“. 8 ITU-T Recommendation G.729: “Coding of speech at 8 kbit/s using conjugate-structure algebraic-code-excited linear-prediction (CS-ACELP)“. 9 IETF RFC 3951: “Internet Low Bit Rate Codec (iLBC)“

23、. 10 ITU-T Recommendation G.722.2: “Wideband coding of speech at around 16 kbit/s using Adaptive Multi-Rate Wideband (AMR-WB)“. 11 ISO/IEC 14496-3: “Information technology - Coding of audio-visual objects - Part 3: Audio“. 12 ITU-T Recommendation H.263: “Video coding for low bit rate communication“.

24、 13 ITU-T Recommendation H.264: “Advanced video coding for generic audiovisual services“. ETSI ETSI TS 185 001 V1.1.1 (2005-11) 7 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: guaranteed QoS: traffic delivery serv

25、ice with numerical bounds on some or all of the QoS parameters NOTE: These bounds may be physical limits, or enforced limits such as those encountered through mechanisms like rate policing. The bounds may result from designating a class of network performance objectives for packet transfer. relative

26、 QoS: traffic delivery service without absolute bounds on the achieved bandwidth, packet delay or packet loss rates NOTE: It describes the circumstances where certain classes of traffic are handled differently from other classes of traffic, and the classes achieve different levels of QoS. 3.2 Abbrev

27、iations For the purposes of the present document, the following abbreviations apply: AMR Adaptive MultiRate speech codec ATM Asynchronous Transfer Mode BER Bit Error Rate CCRP Call/Connection Control Reference Point CDMA Code Division Multiple Access COPS Common Open Policy Service DCME Digital Circ

28、uit Multiplication Equipment DECT Digital Enhanced Cordless Telecommunications DSL Digital Subscriber Line ER Error Ratio GSM Global System for Mobile communication IPDV IP Packet Delay Variation IPER IP Packet Error Ratio IPLR IP Packet Loss Ratio IPTD IP Packet Transfer Delay LAN Local Area Networ

29、k MPEG Moving Picture Experts Group MPLS Multi Protocol Label Switching NCRP Network Control Reference Point NGN Next Generation Network NSIS Next Steps In Signalling PSTN Public Switched Telephone Network QoS Quality of Service RACF Resource and Admission Control Functions RACS Resource and Admissi

30、on Control Subsystem RSVP Resource ReserVation Protocol SCRP Switch Control Reference Point SDU Service Data Unit SIP Session Initiation Protocol SPDF Service Policy Decision Functions UMTS Universal Mobile Telecommunication System UNI User-to-Network Interface VoIP Voice over IP VTC Video TeleConfe

31、rencing service WB-AMR Wide Band - Adaptive MultiRate speech codec WLAN Wireless Local Area Network ETSI ETSI TS 185 001 V1.1.1 (2005-11) 8 4 Introduction The present document defines the generic QoS concepts for NGN and provides a QoS Framework Model. The present document is release independent. TI

32、SPAN deliverables which have a bearing on QoS should indicate, which QoS requirements are met for each release. The QoS requirements include QoS classes, codecs, QoS control mechanisms, QoS architecture, QoS signalling. Annex A identifies, for information, a list of Audio and Video Codecs for conver

33、sational applications. 5 QoS Generic concepts 5.1 QoS and Network Performance The distinction between QoS and Network Performance, as well as the various viewpoints of QoS, are illustrated in ITU-T Recommendation G.1000 1. The end-to-end service as well as a number of in-network services have QoS re

34、quirements. These must be fulfilled by the network in order to meet the QoS requirements. In terms of network performance, we engineer and monitor the network so that services get the QoS they require. 5.2 Performance objectives The NGN performance objectives should be based on the ITU-T Recommendat

35、ion M.2301 3. This recommendation provides performance objectives and procedures for provisioning and maintenance of IP networks owned by different operators. This is regardless of the transport technology supporting the IP network and the higher layers to be implemented over IP. These objectives in

36、clude error performance, delay performance and availability. This Recommendation defines the parameters and their associated objectives based on the principles in ITU-T Recommendation Y.1540 4. ITU-T Recommendation Y.1540 4 also provides, in an Appendix, guidance on the performance objectives and li

37、mits for IP network resources (e.g. routers, sub-networks etc.), which are owned and managed by a single operator. However, the allocation of performance inside an IP network operators domain or network portion is the responsibility of each operator to ensure the end-to-end performance over their do

38、main or network portion meets the limits given in ITU-T Recommendation Y.1540 4. ITU-T Recommendation Y.1540 4 provides a general framework for applying these limits (see clause 8). 5.3 End-to-end and bearer QoS The standardization work traditionally distinguishes between tele-services, which operat

39、ed across terminals and networks (e.g. mouth-ear for voice) and bearer services that excluded terminals (from UNI to UNI). In an opened and deregulated market, it is not always possible to control the users domestic installation. Previously, the QoS specifications have been focused on end-to-end QoS

40、. But in an NGN environment, the QoS at the bearer service level should be taken into account. The bearer service level is the level addressed by ITU-T Recommendation Y.1541 5 and TS 123 107 6. ETSI ETSI TS 185 001 V1.1.1 (2005-11) 9 NGNAccess domainNGNCore domain #1CPNNNIUNI NNIAccess NetworkCore N

41、etworkCore NetworkAccess NetworkNGNCore domain #2NGNAccess domainNNI UNICPNBearer QoSEnd-to-end QoSFigure 1: End-to-end QoS and Bearer QoS 5.4 Guaranteed and relative QoS NGN shall support the development of two different models of service assurance: guaranteed and relative QoS. Guaranteed QoS: This

42、 term refers to a traffic delivery service with numerical bounds on some or all of the QoS parameters. These bounds may be physical limits, or enforced limits such as those encountered through mechanisms like rate policing. The bounds may result from designating a class of network performance object

43、ives for packet transfer. Relative QoS: This term refers to a traffic delivery service without absolute bounds on the achieved bandwidth, packet delay or packet loss rates. It describes the circumstances where certain classes of traffic are handled differently from other classes of traffic, and the

44、classes achieve different levels of QoS. 6 QoS Framework Model 6.1 Framework Model In order to provide a global and homogenous view of functions needed to support end-to-end services in NGN, a framework model is useful. This model should allow the possibility to identify the different processes and

45、functions implied in QoS both in service and transport stratum. This model is not an architecture model. The mapping of this model on a functional architecture is outside the scope of the present document. The decision to standardize or not the functions identified in this model is also outside the

46、scope of the present document. The framework model is based upon the customer-provider relationship. The provider provides a service to the customer. The customer could be either an end-user or another provider. A customer sends a request to initiate a demand to the provider. The framework (figure 2

47、) introduces horizontally three processes, and vertically six levels to structure functions and data. A seventh vertical level is devoted to network element functions, also called transport functions. ETSI ETSI TS 185 001 V1.1.1 (2005-11) 10SERVICE MEDIATION SERVICE EXECUTION OFFERS RESOURCE PROCESS

48、ING NETWORK ELEMENT INVOCATION (DYNAMIC CONTROL PLANE) SUBSCRIPTION/ PROVISIONING Customer AFTER - SALES PROCESSES / LEVELS Service request Service use Transport RESOURCE MEDIATION NETWORK PROCESSING NETWORK ELEMENT PROCESSING SERVICE PROCESSING Figure 2: Framework model 6.1.1 Processes Processes ar

49、e related to the service lifecycle. They structure actions undertaken by providers in answer to customers requests. The proposed processes are the following: 1) Subscription/Provisioning: this process deals with actions that follow customers subscriptions: customer care (contracts, customer profiles), dimensioning, deployment and network configuration management. 2) Invocation: following a service invocation request, this process is in charge of service and resource controls to support services in real-time (or on-demand). 3)