1、 ETSI TS 103 161-5 V1.1.1 (2011-10) Access, Terminals, Transmission and Multiplexing (ATTM); Integrated Broadband Cable and Television Networks; IPCablecom 1.5; Part 5: Dynamic Quality of Service for the Provision of Real Time Services over Cable Television Networks using Cable Modems Technical Spec
2、ification ETSI ETSI TS 103 161-5 V1.1.1 (2011-10)2Reference DTS/ATTM-003011-5 Keywords access, broadband, cable, IP, multimedia, PSTN 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 b
3、ut non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived
4、 difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aw
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6、ttp:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2011. All rights reserved. DECT
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8、sociation. ETSI ETSI TS 103 161-5 V1.1.1 (2011-10)3Contents Intellectual Property Rights 6g3Foreword . 6g31 Scope 8g32 References 8g32.1 Normative references . 8g32.2 Informative references 9g33 Definitions, symbols and abbreviations . 9g33.1 Definitions 9g33.2 Abbreviations . 10g34 Void 11g35 Techn
9、ical Overview . 11g35.1 IPCablecom QoS Architecture Requirements 12g35.2 IP QoS Access Network Elements . 14g35.2.1 Multimedia Terminal Adapter (MTA) 14g35.2.2 Cable Modem (CM) 14g35.2.3 Cable Modem Termination System (CMTS) 14g35.2.4 Call Management Server (CMS) and Gate Controller (GC) . 14g35.2.5
10、 Record Keeping Server (RKS) 14g35.3 IPCablecom Dynamic QoS Architecture 15g35.4 QoS Interfaces 15g35.5 Framework for IPCablecom QoS 17g35.6 Requirements of Access Network Resource Management . 18g35.6.1 Preventing Theft of Service 19g35.6.2 Two-phase Resource Commitment . 19g35.6.3 Segmented Resour
11、ce Assignment. 19g35.6.4 Resource Changes during a Session 20g35.6.5 Dynamic Binding of Resources 20g35.6.6 Dynamic QoS Performance 20g35.6.7 Session Class 20g35.6.8 Intermediate Network Support 20g35.6.9 Backbone QoS Support . 20g35.6.10 Handling Multiple Codecs 21g35.6.11 V.152 Support . 21g35.6.1
12、2 MTA Port-to-Port Calls 22g35.6.13 Multiple Grants per Interval 22g35.7 Theory of Operation . 22g35.7.1 Basic Session Setup 22g35.7.2 Gate Coordination . 23g35.7.3 Changing the Packet Classifiers Associated With a Gate . 24g35.7.4 Session Resources . 24g35.7.5 Admission Control and Session Classes
13、. 25g35.7.6 Resource Renegotiations . 25g35.7.7 Dynamic Binding of Resources (Re-reserve) . 25g35.7.8 Support for Billing 26g35.7.9 Backbone Resource Management . 26g35.7.10 Setting the DiffServ Code Point . 26g35.8 Sample Mapping of SDP Descriptions into RSVP Flowspecs . 26g36 Embedded MTA to CM Qo
14、S Protocol (pkt-q1) . 28g36.1 RSVP FlowSpecs . 28g36.1.1 Complex SDP Descriptions with Multiple Codecs . 29g36.1.2 Mapping RSVP FlowSpecs into DOCSIS1.1 QoS Parameters 30g36.1.2.1 Upstream Quality of Service Encodings . 30g36.1.2.2 Upstream Packet Classification Encodings . 31g3ETSI ETSI TS 103 161-
15、5 V1.1.1 (2011-10)46.1.2.3 Payload Header Suppression Encodings . 32g36.1.2.4 Downstream Quality of Service Encodings 33g36.1.2.5 Downstream Packet Classification Encodings 34g36.1.2.6 Example of Mapping . 35g36.1.3 CMTS Authorization and Behaviour 36g36.2 DOCSIS1.1 Support for Resource Reservation
16、. 37g36.2.1 Two Phase QoS Reservation/Commit. 37g36.2.2 Reservation Maintenance 39g36.2.3 Support for Dynamic Binding of Resources . 39g36.2.4 QoS Parameter Mapping for Authorization 40g36.2.5 Authorization Block Encoding . 42g36.2.6 Payload Header Suppression Handling . 43g36.3 Use of DOCSIS1.1 MAC
17、 Control Service Interface . 43g36.3.1 Reservation Establishment 43g36.3.2 Reservation Change 44g36.3.3 Reservation Deletion. 44g36.3.4 Multiple Grants per Interval Considerations . 45g36.3.4.1 Adding a Sub-Flow Pair 45g36.3.4.2 Modifying a Sub-Flow Pair . 45g36.3.4.3 Deleting a Sub-Flow Pair 46g36.
18、3.4.4 Grouping Service Flows 46g37 Authorization Interface Description (pkt-q6) . 46g37.1 Gates: the Framework for QoS Control 47g37.1.1 Classifier . 47g37.1.2 Gate . 47g37.1.3 Gate Identification 48g37.1.4 Gate Transition Diagram 49g37.1.5 Gate Coordination . 51g37.2 COPS Profile for IPCablecom 52g
19、37.3 Gate Control Protocol Message Formats 53g37.3.1 COPS Common Message Format . 53g37.3.2 Additional COPS Objects for Gate Control 54g37.3.2.1 TransactionID 54g37.3.2.2 Subscriber-ID 55g37.3.2.3 GateID . 55g37.3.2.4 Activity-Count 55g37.3.2.5 Gate-Spec 56g37.3.2.6 Remote-Gate-Info . 57g37.3.2.7 Ev
20、ent-Generation-Info 57g37.3.2.8 Media-Connection-Event-Info 58g37.3.2.9 IPCablecom-Reason 58g37.3.2.10 IPCablecom-Error . 58g37.3.2.11 Electronic-Surveillance-Parameters 59g37.3.2.12 Session-Description-Parameters 60g37.3.3 Definition of Gate Control Messages 60g37.4 Gate Control Protocol Operation
21、62g37.4.1 Initialization Sequence 62g37.4.2 Operation Sequence 63g37.4.3 Procedures for Allocating a new Gate 63g37.4.4 Procedures for Authorizing Resources Through a Gate 64g37.4.5 Procedures for Querying a Gate 66g37.4.6 Procedures for Committing a Gate . 66g37.4.7 Procedures for Closing a Gate 66
22、g37.4.8 Procedures for Deleting a Gate . 66g37.4.9 Termination Sequence 67g37.4.10 Failure Scenario 67g37.5 CMS Use of Gate Protocol . 67g37.6 Gate-Coordination 68g37.6.1 Connecting a Call . 68g37.6.2 Terminating a Call 68g3ETSI ETSI TS 103 161-5 V1.1.1 (2011-10)58 Timer Definitions and Values 69g38
23、.1 Timer T0 . 69g38.2 Timer T1 . 69g38.3 Timer T2 . 70g38.4 Timer T3 . 70g38.5 Timer T4 . 70g38.6 Timer T5 . 70g38.7 Timer T6 . 70g38.8 Timer T7 . 70g38.9 Timer T8 . 70g3Annex A (informative): Theft of Service Scenarios . 71g3Annex B (informative): Common Open Policy Service (COPS) 73g3Annex C (info
24、rmative): TCP Considerations . 75g3Annex D (informative): Bibliography . 79g3History 80g3ETSI ETSI TS 103 161-5 V1.1.1 (2011-10)6Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential
25、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 updates are
26、available on the ETSI Web server (http:/ipr.etsi.org). 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 ETSI Web server) which
27、are, or may be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by ETSI Technical Committee Access, Terminals, Transmission and Multiplexing (ATTM). The present document is part 5 of a multi-part IPCablecom 1.5 deliverable covering the D
28、igital Broadband Cable Access to the Public Telecommunications Network; IP Multimedia Time Critical Services, as identified below: Part 1: “Overview“; Part 2: “Architectural framework for the delivery of time critical services over Cable Television Networks using Cable Modems“; Part 3: “Audio Codec
29、Requirements for the Provision of Bi-Directional Audio Service over Cable Television Networks using Cable Modems“; Part 4: “Network Call Signalling Protocol“; Part 5: “Dynamic Quality of Service for the Provision of Real Time Services over Cable Television Networks using Cable Modems“; Part 6: “Even
30、t Message Specification“; Part 7: “Media Terminal Adapter (MTA Management Information Base (MIB)“; Part 8: “Network Call Signalling (NCS) MIB Requirements“; Part 9: “Security“; Part 10: “Management Information Base (MIB) Framework“; Part 11: “Media terminal adapter (MTA) device provisioning“; Part 1
31、2: “Management Event Mechanism“; Part 13: “Trunking Gateway Control Protocol - MGCP option“; Part 14: “Embedded MTA Analog Interface and Powering Specification“ Part 15: “Analog Trunking for PBX Specification“; Part 16: “Signalling for Call Management Server“; Part 17: “CMS Subscriber Provisioning S
32、pecification“; Part 18: “Media Terminal Adapter Extension MIB“; Part 19: “IPCablecom Audio Server Protocol Specification - MGCP option“; Part 20: “Management Event MIB Specification“; ETSI ETSI TS 103 161-5 V1.1.1 (2011-10)7Part 21: “Signalling Extension MIB Specification“. NOTE 1: Additional parts
33、may be proposed and will be added to the list in future versions. NOTE 2: The choice of a multi-part format for this deliverable is to facilitate maintenance and future enhancements. ETSI ETSI TS 103 161-5 V1.1.1 (2011-10)81 Scope The present document describes a dynamic Quality-of-Service (QoS) mec
34、hanism for the IPCablecom project. It was issued to facilitate design and field-testing leading to the manufacture and interoperability of conforming hardware and software by multiple vendors. IPCablecom is a set of protocols developed to deliver Quality of Service enhanced communications services u
35、sing packetized data transmission technology to a consumers home over the cable network. IPCablecom utilizes a network superstructure that overlays the two-way data-ready cable television network. While the initial service offerings in the IPCablecom product line are anticipated to be Packet Voice a
36、nd Packet Video, the long-term project vision encompasses a large family of packet-based services. The present document addresses requirements for a client device to obtain access to IPCablecom network resources. In particular, it specifies a comprehensive mechanism for a client device to request a
37、specific Quality of Service from the DOCSISnetwork. Extensive examples illustrate the use of the present document. The scope of the present document is to define the QoS Architecture for the “Access“ portion of the IPCablecom network, provided to requesting applications on a per-flow basis. The acce
38、ss portion of the network is defined to be between the Multimedia Terminal Adapter (MTA) and the Cable Modem Termination System (CMTS), including the DOCSISnetwork. The method of QoS allocation over the backbone is unspecified in the present document. Interface to the managed IP backbone and issues
39、related to IP multicast are not within the scope of the present document. The present document also recognizes that per-flow reservations may be required within the customer premises, and the protocol developed addresses this potential need. To summarize, the scope of the present document is: Alloca
40、tion of QoS between the MTA and the CMTS. Specification of the interfaces which are available for control and delivery of QoS in IPCablecom Networks. Support for IPCablecom embedded MTAs. Support for Network-based Call Signalling (NCS) 3. The present document assumes that DOCSISQoS (specifically RFI
41、 version 1.1 2 or later) is used to control and deliver QoS across the DOCSISnetworks. Any reference to DOCSISin the present document is understood to be DOCSISversion 1.1 or later. 2 References References are either specific (identified by date of publication and/or edition number or version number
42、) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:
43、/docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are necessary for the application of the present document. 1 IETF RFC 2748
44、: “The COPS (Common Open Policy Service) Protocol“, January 2000. 2 ETSI ES 201 488: “Data-Over-Cable Service Interface Specifications Radio Frequency Interface Specification“. ETSI ETSI TS 103 161-5 V1.1.1 (2011-10)93 ETSI TS 103 161-4: “Access, Terminals, Transmission and Multiplexing (ATTM); Inte
45、grated Broadband Cable and Television Networks; IPCablecom 1.5 Part 4: Network Call Signalling Protocol“. 4 IETF RFC 0791: “Internet Protocol“, September 1981. 5 IETF RFC 2474: “Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers“, December 1998. 2.2 Informative r
46、eferences The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. i.1 IETF RFC 2753: “A Framework for Policy Based Admission Control“, January 2000. i.2 IETF RFC 3084: “COPS Usage for Policy P
47、rovisioning“, March, 2001. i.3 IETF RFC 2327: SDP: Session Description Protocol, April 1998. i.4 ETSI TS 103 161-6: “Access, Terminals, Transmission and Multiplexing (ATTM); Integrated Broadband Cable and Television Networks; IPCablecom 1.5; Part 6: Event Message Specification“. i.5 ETSI TS 103 161-
48、3: “Access, Terminals, Transmission and Multiplexing (ATTM); Integrated Broadband Cable and Television Networks; IPCablecom 1.5; Part 3: Audio Codec Requirements for the Provision of Bi-Directional Audio Service over Cable Television Networks using Cable Modems“. i.6 IETF RFC 2749: “COPS Usage for R
49、SVP“, January 2000. i.7 IETF RFC 3551: “RTP Profile for Audio and Video Conferences with Minimal control“, July 2003. i.8 ETSI TS 103 161-2: “Access, Terminals, Transmission and Multiplexing (ATTM); Integrated Broadband Cable and Television Networks; IPCablecom 1.5 Part 2: Architectural framework for the delivery of time critical services over Cable Television Networks using Cable Modems“. i.9 IETF RFC 3168: “The Addition of Explicitly Congestion Notification (ECN) to IPI“, September 2001. i.10 ETSI TS 103 161-9: “Access, Te
