ITU-T G 7715 AMD 1-2007 Architecture and requirements for routing in the automatically switched optical networks Amendment 1 (Study Group 15)《链路状态协议的结构和要求》.pdf

1、 International Telecommunication Union ITU-T G.7715/Y.1706TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 1(02/2007) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Data over Transport Generic aspects Transport network control aspects SERIES Y: GLOBAL INFORMATION INF

2、RASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Internet protocol aspects Operation, administration and maintenance Architecture and requirements for routing in the automatically switched optical networks Amendment 1 ITU-T Recommendation G.7715/Y.1706 (2002) Amendment 1 ITU-T G-S

3、ERIES RECOMMENDATIONS TRANSMISSION 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

4、ON METALLIC LINES G.300G.399 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 TRANSMISSION MEDIA AND OPTICAL SYSTEMS CHARACTERISTICS G.6

5、00G.699 DIGITAL TERMINAL EQUIPMENTS G.700G.799 DIGITAL NETWORKS G.800G.899 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 QUALITY OF SERVICE AND PERFORMANCE GENERIC AND USER-RELATED ASPECTS G.1000G.1999 TRANSMISSION MEDIA CHARACTERISTICS G.6000G.6999 DATA OVER TRANSPORT GENERIC ASPECTS G.7000G.

6、7999 General G.7000G.7099 Transport network control aspects G.7700G.7799 PACKET OVER TRANSPORT ASPECTS G.8000G.8999ACCESS NETWORKS G.9000G.9999 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. G.7715/Y.1706 (2002)/Amd.1 (02/2007) i ITU-T Recommendation G.7715/Y.1706

7、 Architecture and requirements for routing in the automatically switched optical networks Amendment 1 Summary This amendment provides updated material pertaining to the architecture and requirements for routing in automatically switched optical networks as described in ITU-T Recommendation G.7715/Y.

8、1706. Source Amendment 1 to ITU-T Recommendation G.7715/Y.1706 (2002) was approved on 6 February 2007 by ITU-T Study Group 15 (2005-2008) under the ITU-T Recommendation A.8 procedure. ii ITU-T Rec. G.7715/Y.1706 (2002)/Amd.1 (02/2007) FOREWORD The International Telecommunication Union (ITU) is the U

9、nited Nations specialized agency 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 tele

10、communications 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 Recommendations is covered by the

11、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 conciseness to indicate both a

12、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 Recommendation is achieved when all of

13、 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. INTELLECTUAL PROPERTY RIGHTS

14、 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, whether asserted by ITU m

15、embers 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 are cautioned that this may

16、 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 2007 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.7

17、715/Y.1706 (2002)/Amd.1 (02/2007) iii CONTENTS Page 1) Additions to clause 6.2, Protocol requirements 1 2) Additions to clause 7.2.3, Other attribute information . 1 3) Additions to clause 8, Routing messages . 1 4) Change to clause 8.2, Routing information messages 1 5) New clause 8.5 1 ITU-T Rec.

18、G.7715/Y.1706 (2002)/Amd.1 (02/2007) 1 ITU-T Recommendation G.7715/Y.1706 Architecture and requirements for routing in the automatically switched optical networks Amendment 1 1) Additions to clause 6.2, Protocol requirements Add the following two bullets after the fourth bullet: The routing protocol

19、 shall be capable of supporting flexible distributions of ASON (ITU-T Rec. G.8080/Y.1304) functional components to different physical systems. The routing protocol shall be capable of supporting flexible cardinality (i.e., m:n) between the RC and ASON functional components as well as between ASON fu

20、nctional components and G.805 sub-networks. 2) Additions to clause 7.2.3, Other attribute information Add the following two paragraphs after the last paragraph: Another example is the inclusion of technology-specific attributes. For example, in a photonic network, optical constraints may need to be

21、reported to allow the proper routing of a connection. The specific attributes required to convey this type of information are not covered in this Recommendation. 3) Additions to clause 8, Routing messages Add the following two sentences to the end of the second paragraph: Routing information may be

22、exchanged by PCs that are not dedicated to Routing Message exchange. For example, a signalling message causing crankback can contain an RI_UPDATE providing additional information regarding the state of links and/or nodes that were specified in a signalling messages Explicit Resource List. 4) Change

23、to clause 8.2, Routing information messages Update the description for RI_UPDATE as follows: RI_UPDATE: This message conveys information about network resources that are available for satisfying connection requests. The received information is stored in the RDB. When this message is generated is not

24、 specified by this Recommendation. One common usage is for an RI_UPDATE message to be generated containing information regarding a resource once the routing information of an existing network resource is changed. An RI_UPDATE message may also be generated as the result of an RI_QUERY message, and in

25、 this case the information received can be transient in the RDB or aged quickly. 2 ITU-T Rec. G.7715/Y.1706 (2002)/Amd.1 (02/2007) 5) New clause 8.5 Add the following new clause after clause 8.4: 8.5 Routing messages in support of Remote Route Query There are cases where a Routing Controller will no

26、t have adequate information or capability, thereby needing the cooperation of another Routing Controller to determine the end-to-end path. In these cases, the Routing Controller may send a RI_QUERY message to another Routing Controller. The RI_QUERY message must include adequate information to perfo

27、rm the path computation, including the points between which the path is to be computed and any constraints that need to be satisfied, adequate information to authenticate the requestor and information about where the response should be sent. When such a message is received by another Routing Control

28、ler, it must first be authenticated to determine the context the path computation must be performed in. The path computation is then performed with the constraints specified as modified by the path computation context. Finally, an RI_UPDATE message with the resources identified by the path computati

29、on is sent to the Routing Controller specified in the RI_QUERY message. 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 Netwo

30、rk aspects Y.300Y.399 Interfaces 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, a

31、ccess, network capabilities and 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 Fram

32、eworks and functional architecture 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.2

33、399 Network management Y.2400Y.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. Printed in Switzerland Geneva, 2007 SERIES OF ITU-T RECOMMENDATIONS Series A Or

34、ganization of the work of ITU-T Series D General tariff principles Series E Overall network operation, telephone service, service operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series H Audiovisual a

35、nd multimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, sound programme and other multimedia signals Series K Protection against interference Series L Construction, installation and protection of cables and other elements of outside

36、plant Series M Telecommunication management, including TMN and network maintenance Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measuring equipment Series P Telephone transmission quality, telephone installations, local line netw

37、orks Series Q Switching and signalling Series R Telegraph transmission Series S Telegraph services terminal equipment Series T Terminals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks, open system communications and security Series Y Global information infrastructure, Internet protocol aspects and next-generation networks Series Z Languages and general software aspects for telecommunication systems