ITU-T G 7716-2010 Architecture of control plane operations (Study Group 15)《控制平面操作的架构 15号研究组》.pdf

1、 International Telecommunication Union ITU-T G.7716/Y.1707TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (01/2010) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Data over Transport Generic aspects Transport network control aspects SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE

2、, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Internet protocol aspects Operation, administration and maintenance Architecture of control plane operations Recommendation ITU-T G.7716/Y.1707 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNA

3、TIONAL 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 CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SY

4、STEMS 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.600G.699 DIGITAL TERMINAL EQUIPMENTS G.700G.799 DIGITAL NETWORKS G.800G.899 DIGITAL SECTION

5、S AND DIGITAL LINE SYSTEM G.900G.999 MULTIMEDIA 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.7999 General G.7000G.7099 Transport network control aspects G.7700G.7799PACKET

6、OVER TRANSPORT ASPECTS G.8000G.89ACCESS NETWORKS G.9000G.9999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T G.7716/Y.1707 (01/2010) i Recommendation ITU-T G.7716/Y.1707 Architecture of control plane operations Summary Recommendation ITU-T G.7716/Y.1707 addresses

7、the architecture of control plane operations. Guidance for service providers on the automatically switch optical network (ASON) network plan, performing typical operations in the network, and sequencing the ITU-T G.7718.1 operations, are described in this Recommendation. This Recommendation also pro

8、vides guidance to control plane function and protocol designers on the sort of operations control plane protocols and implementations that they need to be able to support. History Edition Recommendation Approval Study Group 1.0 ITU-T G.7716/Y.1707 2010-01-13 15 ii Rec. ITU-T G.7716/Y.1707 (01/2010)

9、FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for stud

10、ying 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, establishes the topics for study by the ITU-T study grou

11、ps 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 standards are prepared on a collaborative basis with I

12、SO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisio

13、ns (to ensure e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of 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

14、words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS 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

15、concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members 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

16、by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may 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 2010 All rights reserved. No part of thi

17、s publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T G.7716/Y.1707 (01/2010) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitions 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation . 2 4 Abbreviations and acronym

18、s 2 5 Conventions 3 6 Overview of control plane deployment 3 7 Automatically switched optical network plan 5 7.1 Transport network plan . 5 7.2 Management plane infrastructure . 5 7.3 SCN infrastructure 6 8 Initialization of control plane platforms . 6 8.1 Commissioning . 6 8.2 Reconfiguration 8 9 O

19、peration and maintenance 8 9.1 Provisioning 8 9.2 Resource assignment 9 9.3 Discovery/authentication process . 9 9.4 Link configuration 10 9.5 Routing adjacency configuration 12 9.6 Reconfiguration 13 9.7 Auditing 21 9.8 Recovery . 23 Appendix I Initialization example . 25 Rec. ITU-T G.7716/Y.1707 (

20、01/2010) 1 Recommendation ITU-T G.7716/Y.1707 Architecture of control plane operations 1 Scope This Recommendation provides guidance for the service providers on: how to plan an automatically switched optical network (ASON) network; the actions necessary to perform typical operations in the network;

21、 how to sequence the ITU-T G.7718.1 operations. This Recommendation also provides guidance to control plane function and protocol designers on the sort of operations control plane protocols and implementations that they need to be able to support. 2 References The following ITU-T Recommendations and

22、 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 encour

23、aged 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 docu

24、ment, the status of a Recommendation. ITU-T G.798 Recommendation ITU-T G.798 (2006), Characteristics of optical transport network hierarchy equipment functional blocks. ITU-T G.872 Recommendation ITU-T G.872 (2001), Architecture of optical transport networks. ITU-T G.7710 Recommendation ITU-T G.7710

25、 /Y.1701 (2007), Common equipment management function requirements. ITU-T G.7712 Recommendation ITU-T G.7712/Y.1703 (2008), Architecture and specification of data communication network. ITU-T G.7713 Recommendation ITU-T G.7713/Y.1704 (2009), Distributed call and connection management (DCM). ITU-T G.

26、7713.1 Recommendation ITU-T G.7713.1/Y.1704.1 (2003), Distributed Call and Connection Management (DCM) based on PNNI. ITU-T G.7713.2 Recommendation ITU-T G.7713.2/Y.1704.2 (2003), Distributed Call and Connection Management: Signalling mechanism using GMPLS RSVP-TE. ITU-T G.7713.3 Recommendation ITU-

27、T G.7713.3/Y.1704.3 (2003), Distributed Call and Connection Management: Signalling mechanism using GMPLS CR-LDP. ITU-T G.7714 Recommendation ITU-T G.7714/Y.1705 (2005), Generalized automatic discovery for transport entities. ITU-T G.7714.1 Recommendation ITU-T G.7714.1/Y.1705.1 (2003), Protocol for

28、automatic discovery in SDH and OTN networks. 2 Rec. ITU-T G.7716/Y.1707 (01/2010) ITU-T G.7715 Recommendation ITU-T G.7715/Y.1706 (2002), Architecture and requirements for routing in the automatically switched optical networks. ITU-T G.7715.1 Recommendation ITU-T G.7715.1/Y.1706.1 (2004), ASON routi

29、ng architecture and requirements for link state protocols. ITU-T G.7715.2 Recommendation ITU-T G.7715.2/Y.1706.2 (2007), ASON routing architecture and requirements for remote route query. ITU-T G.7718 Recommendation ITU-T G.7718/Y.1709 (2005), Framework for ASON management. ITU-T G.7718.1 Recommenda

30、tion ITU-T G.7718.1/Y.1709.1 (2006), Protocol-neutral management information model for the control plane view. ITU-T G.8080 Recommendation ITU-T G.8080/Y.1304 (2006), Architecture for the automatically switched optical network (ASON). ITU-T G.8081 Recommendation ITU-T G.8081/Y.1353 (2008), Terms and

31、 definitions for Automatically Switched Optical Networks (ASON). 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 platform (ITU-T X.638): An implementation of an identified platform specification. 3.1.2 platform specification (ITU-T X.63

32、8): The functional specification of a formal programmatic interface and a set of supporting local services for an identified stack specification. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1 commissioning: The act of specifying parameters necessary

33、to create a control plane instance. These parameters are fundamental to the continued operation of the control plane instance and cannot be changed without significant impact to the control plane instance. Therefore, Commissioning is only done during the initialization phase of the control plane lif

34、ecycle. Note that commissioning is focused on the commissioning on the control plane component and not the data/transport plane resource. 3.2.2 provisioning: The act of specifying the parameters necessary when assigning/deassigning network resources to/from the control plane or to invoke/remove serv

35、ices provided by a control plane instance. These parameters are specific to a resource or service request, causing changes to these parameters to only impact a specific resource or service request. Therefore, provisioning is allowed in the initialization and operations phases of the control plane li

36、fecycle. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: AN Abstract Node ASON Automatically Switched Optical Network BN Boundary Node CC Connection Controller Rec. ITU-T G.7716/Y.1707 (01/2010) 3 CD Control Domain CP Control Plane DA Discovery Agent D

37、CN Data Communication Network E-NNI External Network-Network Interface FCAPS Fault management, Configuration management, Accounting management, Performance management, Security management ID Identifier I-NNI Internal Network-Network Interface LRM Link Resource Manager NCC Network Call Controller NE

38、Network Equipment OSPF-TE Open Shortest Path First Traffic Engineering PC Protocol Controller RA Routing Area RC Routing Controller RSVP-TE Resource Reservation Protocol Traffic Engineering SCN Signalling Communication Network SN Subnetwork SNP Subnetwork Point SNPP Subnetwork Point Pool TAP Termina

39、tion and Adaptation Performer TMN Telecommunication Management Network TRI Transport Resource Identifier UNI User Network Interface VPN Virtual Private Network 5 Conventions None. 6 Overview of control plane deployment The design of a transport network requires network planning as well as traffic pl

40、anning. The process of network planning determines the network design given a traffic forecast. Network planning processes could apply to only parts of a network, e.g., subnetworks. The process of traffic planning determines the way that traffic predicted in the traffic forecast will be routed using

41、 existing network resources. The process of capacity install is based on the service request from the customer, and activates the network resource for the assigned traffic. These two processes are constantly attempting to provide the highest quality service at the least cost to the operator. They se

42、parately exist as they operate in two different time scales the process of building new network resources (i.e., fibre routes, central offices, NE deployment) to deal with new 4 Rec. ITU-T G.7716/Y.1707 (01/2010) traffic predicted in a network forecast takes months to years while the process of esta

43、blishing trunks using existing resources may take only minutes to weeks. Traffic forecasts are periodically developed based on trends, advance information from customers and macro-economic factors. Since these inputs are dynamic, the forecast is also dynamic. Figure 6-1 shows the three processes in

44、transport network design and operation phases. The result of the traffic planning process is the input to the network planning process, and the network resource is activated by the capacity install process. Before the network planning process starts, the operator should collect the traffic demands.

45、These demands may come at different times. It is impossible to start the network planning process when each demand comes. So the demands are grouped, and the network planning process is periodically executed. G.7716-Y1707(10)_F6-1Demand forecast/traffic planning startedAll demands accomodated/traffi

46、c planning completeIdentify group of demandsNew capacity install required/start capacity installationInstall complete/move assigned traffic to resource,make capacity availableto traffic planningEvaluate demand/assign demand toexisting capacityCapacity thresholdcrossed/network planningrequiredTraffic

47、 planning processIdleTrafficplanningin-progressNetworkplanningin-progressCapacity threshold crossed/network planning startedAll demandsaccomodated/network planning completeNetwork planning processGroup of demands accomodated/network planning completeReview groupof demandsGroup of demands not accomod

48、ated/install new capacity,assign to new capacityIdleCapacity install processCapacityinstallin-progressIdleInitial state: Network has 0 capacityand 0 planned demandsFigure 6-1 Three processes in transport network design and operation phases Rec. ITU-T G.7716/Y.1707 (01/2010) 5 7 Automatically switche

49、d optical network plan 7.1 Transport network plan As a part of the network engineering process, a transport network plan is developed and refined. This plan specifies the fundamental information needed to set up and operate an ASON. The information in the transport network plan can be divided into two categories: ASON Infrastructure and data plane topology. The necessary information for these two categories is shown in Table 7-1. Table 7-1 Network structure plan information ASON infrastru