ITU-T Y 1704 2-2003 Distributed Call and Connection Management Signalling mechanism using GMPLS RSVP-TE SERIES Y GLOBAL INFORMATION INFRASTRUCTURE AND INTERNET PROTOCOL ASPECTS Intt.pdf

1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T G.7713.2/Y.1704.2TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2003) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital terminal equipments Operations, administration and maintenance features of transmission equipment SER

2、IES Y: GLOBAL INFORMATION INFRASTRUCTURE AND INTERNET PROTOCOL ASPECTS Internet protocol aspects Operation, administration and maintenance Distributed Call and Connection Management: Signalling mechanism using GMPLS RSVP-TE ITU-T Recommendation G.7713.2/Y.1704.2 ITU-T G-SERIES RECOMMENDATIONS TRANSM

3、ISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199 GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER-TRANSMISSION SYSTEMS G.200G.299 INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES G.300G.399

4、 GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METALLIC LINES G.400G.449 COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY G.450G.499 TESTING EQUIPMENTS G.500G.599 TRANSMISSION MEDIA CHARACTERISTICS G.600G.699 DIGITAL TE

5、RMINAL EQUIPMENTS G.700G.799 DIGITAL NETWORKS G.800G.899 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 QUALITY OF SERVICE AND PERFORMANCE G.1000G.1999 TRANSMISSION MEDIA CHARACTERISTICS G.6000G.6999 DIGITAL TERMINAL EQUIPMENTS G.7000G.7999 General G.7000G.7099 Coding of analogue signals by pul

6、se code modulation G.7100G.7199 Coding of analogue signals by methods other than PCM G.7200G.7299 Principal characteristics of primary multiplex equipment G.7300G.7399 Principal characteristics of second order multiplex equipment G.7400G.7499 Principal characteristics of higher order multiplex equip

7、ment G.7500G.7599 Principal characteristics of transcoder and digital multiplication equipment G.7600G.7699 Operations, administration and maintenance features of transmission equipment G.7700G.7799 Principal characteristics of multiplexing equipment for the synchronous digital hierarchy G.7800G.789

8、9 Other terminal equipment G.7900G.7999 DIGITAL NETWORKS G.8000G.8999 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. G.7713.2/Y.1704.2 (03/2003) i ITU-T Recommendation G.7713.2/Y.1704.2 Distributed Call and Connection Management: Signalling mechanism using GMPLS R

9、SVP-TE Summary This Recommendation meets the requirements of ITU-T Rec. G.7713/Y.1704 and is functionally similar to ITU-T Recs G.7713.1/Y.1704.1 and G.7713.3/Y.1704.3. This Recommendation covers the areas associated with the signalling aspects of automatic switched transport network (ASTN). Specifi

10、cally it provides the signalling protocol based on the GMPLS RSVP-TE. This Recommendation focuses on the UNI and E-NNI interface specification. While these protocol specifications are generally applicable to the I-NNI as well, the I-NNI interface specification is for further study. This Recommendati

11、on encompasses support for Soft Permanent Connection (SPC) services. This version also includes support for Switched Connection (SC) services for intra-carrier application. As such, name translation/directory services and call capability sets are not included. This signalling protocol is used for th

12、e communications of call controller, connection controller and link resource manager. Areas covered include: message specifications; attribute specifications; signal flows. This Recommendation does not cover any aspects related to routing, or automatic discovery. Source ITU-T Recommendation G.7713.2

13、/Y.1704.2 was prepared by ITU-T Study Group 15 (2001-2004) and approved under the WTSA Resolution 1 procedure on 16 March 2003. History This Recommendation forms part of a suite of Recommendations covering the full functionality of the automatic switched transport network (ASTN). Document history Is

14、sue Notes 0.1 Version 0.1 of G.7713.2/Y.1704.2 0.2 Modifications based on WD40 of 2/02 Q.14/15 meeting 0.3 Editorial modifications to provide clarifications in some sections of the Recommendation 0.4 Included new text on SPC, Call, Recovery 0.5 Modifications to text for call processing 0.6 Modificat

15、ion based on comments received at 10/02 Q.14/15 meeting 0.7 Accept the revision mark of version 0.6 0.8 Editorial changes to align with IANA codepoint assignments Keywords Automatic switched optical network, Automatic switched transport network, Distributed call and connection management, Exterior n

16、etwork-node interface, GMPLS RSVP-TE, User network interface. ii ITU-T Rec. G.7713.2/Y.1704.2 (03/2003) 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

17、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, est

18、ablishes 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-Ts purview, the necessary s

19、tandards 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. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibi

20、lity 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 asserted by ITU members or others outside of the Rec

21、ommendation 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, implementors are cautioned that this may not represent the latest informati

22、on and are therefore strongly urged to consult the TSB patent database. ITU 2003 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. G.7713.2/Y.1704.2 (03/2003) iii CONTENTS Page 1 Scope 1 2 References.

23、1 3 Terms and definitions . 2 4 Abbreviations 3 5 Conventions 3 6 Assumptions . 3 7 Overview and application of GMPLS RSVP-TE to distributed connection management 4 7.1 Overview of GMPLS RSVP-TE 4 7.2 Defect handling of GMPLS RSVP-TE. 8 7.3 Example signalling flows . 10 8 GMPLS RSVP-TE messages 16 8

24、.1 Path. 17 8.2 Resv 18 8.3 ResvConf 19 8.4 PathTear 19 8.5 PathErr 20 8.6 Notify 20 8.7 Hello . 21 8.8 Ack . 21 8.9 Srefresh. 21 9 GMPLS RSVP-TE attributes 22 9.1 GMPLS RSVP-TE objects . 22 9.2 GMPLS RSVP-TE error/status codes 25 Annex A Summary of GENERALIZED_UNI object. 29 Annex B Label scope 30

25、B.1 Scope of the label . 30 B.2 Label association function 31 Annex C Technology-specific terminology updates. 31 Appendix I Mapping of messages. 33 Appendix II Mapping of attributes 34 Appendix III Protocol elements not used 35 III.1 Messages not used 35 III.2 Objects not used . 36 Appendix IV Supp

26、ort for call capability. 36 IV.1 Call capability object 36 Appendix V Example multiple control plane node failures 37 ITU-T Rec. G.7713.2/Y.1704.2 (03/2003) 1 ITU-T Recommendation G.7713.2/Y.1704.2 Distributed Call and Connection Management: Signalling mechanism using GMPLS RSVP-TE 1 Scope This Reco

27、mmendation covers the areas associated with the signalling aspects of automatic switched transport network (ASTN). Specifically it provides the signalling protocol based on the GMPLS RSVP-TE. This Recommendation focuses on the UNI and E-NNI interface specification. While these protocol specification

28、s are generally applicable to the I-NNI as well, the I-NNI interface specification is for further study. This Recommendation encompasses support for Soft Permanent Connection (SPC) services. This version also includes support for Switched Connection (SC) services for intra-carrier application. As su

29、ch, name translation/directory services and call capability sets are not included. This signalling protocol is used for the communications of call controller, connection controller and link resource manager. Areas covered include: message specifications; attribute specifications; signal flows. This

30、Recommendation provides the attribute and message specification, and signalling exchange that allow support for hierarchical, source and step-by-step routing. Other areas of ASTN such as routing mechanism, parameters associated with routing mechanisms, discovery, and naming and addressing are not in

31、 the scope of this Recommendation. This Recommendation uses the control plane architectural requirements in ITU-T Rec. G.8080/Y.1304 and the protocol neutral requirements as outlined in ITU-T Rec. G.7713/Y.1704 as the basis for the specification. 2 References The following ITU-T Recommendations and

32、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 are therefore encoura

33、ged 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 a stand-alone docum

34、ent, the status of a Recommendation. ITU-T Recommendation E.360.1 (2002), Framework for QoS routing and related traffic engineering methods for IP-, ATM- and TDM-based multiservice networks. ITU-T Recommendation G.703 (2001), Physical/electrical characteristics of hierarchical digital interfaces. IT

35、U-T Recommendation G.707/Y.1322 (2000), Network node interface for the Synchronous Digital Hierarchy (SDH). ITU-T Recommendation G.709/Y.1331 (2003), Interfaces for the Optical Transport Network (OTN). ITU-T Recommendation G.7713/Y.1704 (2001), Distributed Call and Connection Management (DCM). ITU-T

36、 Recommendation G.803 (2000), Architecture of transport networks based on the Synchronous Digital Hierarchy (SDH). 2 ITU-T Rec. G.7713.2/Y.1704.2 (03/2003) ITU-T Recommendation G.805 (2000), Generic functional architecture of transport networks. ITU-T Recommendation G.807/Y.1302 (2001), Requirements

37、 for Automatic Switched Transport Network (ASTN). ITU-T Recommendation G.872 (2001), Architecture of optical transport networks. ITU-T Recommendation G.8080/Y.1304 (2001), Architecture for Automatic Switched Optical Network (ASON). IETF RFC 2205 (1997), Resource ReSerVation Protocol (RSVP) Version 1

38、 Functional Specification. IETF RFC 2747 (2000), RSVP Cryptographic Authentication. IETF RFC 2750 (2000), RSVP Extensions for Policy Control. IETF RFC 2961 (2001), RSVP Refresh Overhead Reduction Extensions. IETF RFC 3097 (2001), RSVP Cryptographic Authentication Updated Message Type Value. IETF RFC

39、 3209 (2001), RSVP-TE: Extensions to RSVP for LSP Tunnels. IETF RFC 3471 (2003), Generalized Multi-Protocol Label Switching (GMPLS) Signalling Functional Description. IETF RFC 3473 (2003), Generalized Multi-Protocol Label Switching (GMPLS) Signalling Resource Reservation Protocol Traffic Engineering

40、 (RSVP-TE) Extensions. OIF UNI-01.0 (2001), User Network Interface (UNI) 1.0 signalling specification. 3 Terms and definitions The following terms are defined in ITU-T Rec. G.805: administrative domain; layer network; link connection; management domain; subnetwork; subnetwork connection. The followi

41、ng terms are defined in ITU-T Rec. G.8080/Y.1304: agent; component; call controller; connection controller; connection admission control; route controller; neighbour discovery; link resource manager; policy; protocol controller; ITU-T Rec. G.7713.2/Y.1704.2 (03/2003) 3 subnetwork point; subnetwork p

42、oint pool. The following terms are defined in ITU-T Rec. G.807/Y.1302: soft permanent connection; switched connection. 4 Abbreviations This Recommendation uses the following abbreviations: ASON Automatic Switched Optical Network ASTN Automatic Switched Transport Network CallC Call Controller CC Conn

43、ection Controller CCC Calling/Called Party Call Controller DCM Distributed Call and Connection Management E-NNI Exterior NNI GMPLS Generalized Multi-Protocol Label Switching I-NNI Interior NNI LRM Link Resource Manager NCC Network Call Controller NNI Network Node Interface RSVP-TE Resource reSerVati

44、on Protocol Traffic Engineering SC Switched Connection SNP Subnetwork Point SNPP Subnetwork Point Pool SPC Soft Permanent Connection UNI User Network Interface 5 Conventions In this Recommendation, the acronym GMPLS is used to denote the signalling protocol portion of GMPLS based on the GMPLS RSVP-T

45、E and should be read as synonymous to GMPLS RSVP-TE. 6 Assumptions This Recommendation assumes the messages and objects defined by RFC 2205, RFC 2961, RFC 3209, RFC 3471 GMPLS-SIG, RFC 3473 GMPLS-RSVP-TE, and OIF UNI-01.0 as the basis for the protocol specification for the ASON network. ITU-T Rec. G

46、.8080/Y.1304 defines a UNI Transport Resource Addresses for the bearer links at the UNI reference point. For this Recommendation, an instantiation of those addresses will follow the OIF Transport Network Address (TNA) from OIF UNI-01.0 which complies with the G.8080/Y.1304 architecture. Allowable ad

47、dress formats in the OIF TNA are IPv4, IPv6, and NSAP addresses. 4 ITU-T Rec. G.7713.2/Y.1704.2 (03/2003) Call routing services are assumed to be available that associate a UNI Transport Resource Addresses with internal routable addresses. This is not within the scope of this Recommendation. Address

48、ing of transport resources in the protocol is done by SNPP identifiers. A pair of these would identify an SNPP link. SNPP names are defined from transport name spaces (see clause 10/G.8080/Y.1304) and it is important to note that control plane names/addresses are not used for these. For example, nei

49、ther routing controller nor connection manager identifiers are used for bearer link names. The terms Quality of Service (QoS), Class of Service (CoS), and Grade of Service (GoS) with respect to the transport plane are used in this Recommendation in the sense of ITU-T Rec. E.360.1. It is expected that ASON specific characteristics and parameters will be associated with these terms in later versions of this Recommendation. 7 Overview and applica