1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T G.7713.1/Y.1704.1TELECOMMUNICATION 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 (DCM) based on PNNI ITU-T Recommendation G.7713.1/Y.1704.1 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MED
3、IA, 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 GENERAL CHARACTERISTI
4、CS 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 TERMINAL EQUIPMENTS G.70
5、0G.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 pulse code modulation G.7
6、100G.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 equipment G.7500G.7599 Prin
7、cipal 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.7899 Other terminal equip
8、ment G.7900G.7999 DIGITAL NETWORKS G.8000G.8999 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. G.7713.1/Y.1704.1 (03/2003) i ITU-T Recommendation G.7713.1/Y.1704.1 Distributed call and connection management (DCM) based on PNNI Summary This Recommendation provides
9、the protocol specifications for distributed call and connection management based on PNNI/Q.2931. This Recommendation meets the requirements of ITU-T Rec. G.7713/Y.1704 and is functionally similar to other ITU-T Recommendations in the G.7713 series. The protocol specification in this Recommendation s
10、pecifies the communications across interfaces to effect automated call operations and connection operations. This version of the Recommendation is concerned with the specification for soft permanent connections. Items covered in this Recommendation include: message functional definition and content;
11、 general message format and information element coding; call/connection control procedures. This Recommendation does not cover any aspects related to routing, or automatic discovery. Source ITU-T Recommendation G.7713.1/Y.1704.1 was prepared by ITU-T Study Group 15 (2001-2004) and approved under the
12、 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 Version Approval 0.1 G.7713.1/Y.1704.1 2003-03-16 Keywords Automatic switched optic
13、al network, Automatic switched transport network, Distributed call and Connection management, Exterior network-node interface, PNNI, Q.2931, User network interface. ii ITU-T Rec. G.7713.1/Y.1704.1 (03/2003) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized ag
14、ency 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 worldwid
15、e 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
16、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 conciseness to indicate both a telecommunication administra
17、tion 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
18、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 attention to the
19、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, whether asserted by ITU members or others outside of
20、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, implementors are cautioned that this may not represent the latest in
21、formation 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.7713.1/Y.1704.1 (03/2003) iii CONTENTS Page 1 Scope 1 2 Refer
22、ences. 1 3 Terms and Definitions 2 4 Abbreviations and acronyms 2 5 Conventions 3 6 Assumptions . 3 7 Applications 3 7.1 Overview of PNNI 4 7.2 Defect handling 4 7.3 Example signalling flows . 5 8 Message functional definition and content. 6 8.1 Messages for distributed connection management. 6 8.2
23、Messages used with the global call reference. 12 9 General message format and Information Element coding 13 9.1 Overview 13 9.2 Protocol discriminator 14 9.3 Call Reference 14 9.4 Message type and length 14 9.5 Variable length Information Elements . 15 10 Updated procedures 26 10.1 Link Connection I
24、dentifier allocation/selection . 27 10.2 Connection clearing for non-persistent connections 30 10.3 Procedures for connections persistent across signalling failures . 30 10.4 Bearer Plane failures. 31 10.5 Receipt of NOTIFY messages 32 Annex A Transport of G.7713.1/Y.1704.1 messages over DCN network
25、 32 A.1 Introduction 32 A.2 Differences in boundary interfaces. 32 A.3 Overview of SSCOPMCE link management process 33 A.4 Changes required to ITU-T Rec. Q.2931 . 35 A.5 Changes required to the SSCF (ITU-T Rec. Q.2130) 35 A.6 Applicability of SSCOPMCE specific parameters and timers . 35 A.7 Layer ma
26、nagement boundary . 35 A.8 Link types . 36 Annex B Graceful deletion . 37 B.1 Introduction 37 B.2 Sending deletion notification 37 iv ITU-T Rec. G.7713.1/Y.1704.1 (03/2003) Page B.3 Receiving deletion notification. 37 B.4 Receiving ready for deletion 37 Annex C DTL processing in the absence of routi
27、ng protocols. 38 Annex D ASON call identifier 38 Appendix I Mapping of G.7713/Y.1704 UNI attributes to Q.2931/PNNI . 40 Appendix II Mapping of G.7713/Y.1704 E-NNI Attributes to Q.2931/PNNI . 40 Appendix III Link connection scope. 41 III.1 Scope of the link connection identifier. 41 III.2 A link conn
28、ection identifier association function. 42 ITU-T Rec. G.7713.1/Y.1704.1 (03/2003) 1 ITU-T Recommendation G.7713.1/Y.1704.1 Distributed call and connection management (DCM) based on PNNI 1 Scope This Recommendation provides the protocol specifications for distributed call and connection management ba
29、sed on PNNI/Q.2931, developed within the context of G.7713/Y.1704 DCM requirements. The protocol specifications in this Recommendation specify the communications across interfaces to effect automated call operations and connection operations. This version of the Recommendation is concerned with the
30、specification for soft permanent connections. As such the call model is based on the concept of a null call as described in ITU-T Rec. G.8080/Y.1304. By providing a call identifier in the soft permanent connection model, the specification can be extended in later versions to include switched connect
31、ions. As such, name translation/directory services and call capability sets are not included. Items covered in this Recommendation include: message functional definition and content; general message format and information element coding; call/connection control procedures. This Recommendation does n
32、ot cover any aspects related to routing, or automatic discovery. This Recommendation does not specify the use of the PNNI routing algorithm, nor does it restrict the use of PNNI to an ATM transport implementation, indeed PNNI can be transported using protocols other than ATM, e.g., Internet Protocol
33、. 2 References The following ITU-T Recommendations 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 revis
34、ion; users of this Recommendation are 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
35、Recommendation does not give it, as a stand-alone document, the status of a Recommendation. 1 ITU-T Recommendation Q.931 (1998), ISDN user-network interface layer 3 specification for call control. 2 ATM Forum af-cs-0125.000 (1999), ATM Inter-Network (ANNI) Specification. 3 ATM Forum af-pnni-0055.002
36、 (2002), Private Network-Network Interface Specification v.1.1. 4 ITU-T Recommendation Q.2111 (1999), B-ISDN ATM adaptation layer Service specific connection oriented protocol in a multi-link and connectionless environment (SSCOPMCE). 5 ITU-T Recommendation Q.2931 (1995), Digital Subscriber Signalli
37、ng System No. 2 (DSS2) User-Network Interface (UNI) layer 3 specification for basic call/connection. 6 ATM Forum af-cs-0127.000 (1999), PNNI SPVC Addendum Version 1.0. 7 ITU-T Recommendation Q.2610 (1999), Usage of cause and location in B-ISDN user part and DSS2. 8 ATM Forum af-sig-0140.000 (2000),
38、Network Call Correlation Identifier v.1.0. 9 ATM Forum af-sig-0061.000 (1996), UNI Signalling v.4.0. 2 ITU-T Rec. G.7713.1/Y.1704.1 (03/2003) 10 ATM Forum af-cs-0141.000 (2000), PNNI Addendum for Path and Connection Trace, Version 1.0. 11 ATM Forum af-cs-0148.000 (2000), Modification of Traffic Desc
39、riptor for an Active Connection, Addendum to UNI 4.0/PNNI 1.0/AINI. 12 ATM Forum af-cs-0173.000 (2001), Domain-based rerouting for active point-to-point calls, Version 1.0. 13 ITU-T Recommendation G.807/Y.1302 (2001), Requirements for automatic switched transport networks (ASTN). 14 ITU-T Recommenda
40、tion G.7712/Y.1703 (2003), Architecture and specification of data communication network. 15 ITU-T Recommendation G.7713/Y.1704 (2001), Distributed call and connection management (DCM). 16 ITU-T Recommendation G.7714/Y.1705, (2001), Generalized automatic discovery techniques. 17 ITU-T Recommendation
41、G.8080/Y.1304 (2001), Architecture for the automatically switched optical networks (ASON). 18 ITU-T Recommendation E.360.1 (2002), Framework for QoS routing and related traffic engineering methods for IP-, ATM-, and TDM-based multiservice networks. 19 ITU-T Recommendation G.707/Y.1322 (2000), Networ
42、k node interface for the synchronous digital hierarchy (SDH). 20 ITU-T Recommendation G.709/Y.1331 (2003), Interfaces for the Optical Transport Network (OTN). 3 Terms and Definitions The following terms are defined in ITU-T Rec. G.8080/Y.1304: connection controller; link resource manager; subnetwork
43、 point; subnetwork point pool. The following term is defined in ITU-T Rec. G.807/Y.1302: soft permanent connection. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations: AESA ATM End System Address ASON Automatic Switched Optical Network ASTN Automatic Switched Transport
44、 Network CC Connection Controller DTL Designated Transit List IE Information Element ITU-T Rec. G.7713.1/Y.1704.1 (03/2003) 3 LCI Link Connection Identifier LRM Link Resource Manager M Mandatory NCCI Network Call Correlation Identifier O Optional PNNI Private Network-Network Interface SNP Subnetwork
45、 Point SNPP Subnetwork Point Pool SPC Soft Permanent Connection TLV Type, Length, Value 5 Conventions In this Recommendation, the acronym PNNI is used to refer to the signalling protocol portion of PNNI 5, together with a number of extension specifications. 6 Assumptions This Recommendation assumes
46、a subset of the messages and information elements defined by the PNNI 5 as the basis for the protocol specification for the Automatic Switched Transport Network (ASTN). Signalling procedures defined by the PNNI are assumed to apply except for the modifications identified in clause 10. This Recommend
47、ation supports the NSAP address format for addressing information. Other address formats such as IP version 4 and IP version 6 can be supported through conversion to NSAP format. Addressing of transport resources in the protocol is done via Subnetwork Point Pool (SNPP) identifiers. A pair of these S
48、NPP identifiers 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, neither routing controller nor connection manager identifiers are used for bearer
49、 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 Applications Figure 7-1 provides an overall view of control plane partitioning and the main interfaces of the control plane that pert
