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GB/T 21645.11-2017Technical requirements for Automatically Switched Optical Network (ASON)—Part11:Path Computation Element (PCE) and protocol (English PDF)

自动交换光网络（ASON）技术要求第11部分：路径计算单元（PCE）及协议

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 12, 2017

Implementation date

December 1, 2017

Scope

GB/T 21645.11-2017 is the English-translated version of 自动交换光网络（ASON）技术要求第11部分：路径计算单元（PCE）及协议.

GB/T 21645.11-2017 is Part 11 of the Chinese national series of technical requirements for the Automatically Switched Optical Network (ASON), and covers the Path Computation Element (PCE) and its protocol.

It sets out the PCE functional architecture, implementation and deployment, and its path computation capability within a single domain, across multiple domains and across multiple levels.

It also specifies the PCE communication protocol (PCEP) with its message exchange and message definitions, PCE discovery, communication channels, and management, reliability, security and performance requirements.

Informative annexes deal with PCE in WSON networks, inter-layer path computation, backward recursive path computation (BRPC) across domains, PCE auto-discovery scenarios and path keys for path confidentiality.

It applies to ASON networks and equipment that use a PCE for path computation. It was issued on 12 May 2017 and has applied since 1 December 2017.

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Document preview — GB/T 21645.11-2017

National Standard of the People's Republic of China

ICS: 33.040.20
Classification: M 33

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1 Scope
2 normative reference document
3 terms and definitions, abbreviations
3.1 Terms and definitions
3.2 Abbreviations
4 path calculation unit (PCE) function architecture
4.1 Path Calculation Unit (PCE) Definition
4.2 PCE overall function architecture
4.3 PCE implementation
4.4 PCE deployment plan
5 PCE path calculation capability
5.1 Overview
5.2 Single-domain routing calculation capability
5.3 Multi-domain routing calculation capability
5.4 Multi-level path calculation capability
6 PCE communication protocol
6.1 PCE communication protocol requirements
6.2 PCEP protocol message exchange process
6.3 PCEP message definition
7 PCE found
7.1 Topology Resource Capability Discovery Requirements
7.2 Path Computing Capability Discovery
7.3 PCE Manual Configuration
8 PCE communication channel
8.1 Implementation of communication channels
8.2 Communication channel reliability requirements
9 PCE Management Requirements
9.1 Configuration Management
9.2 Performance Management Parameters
9.3 Alarm Management
11.1 Path calculation confidentiality requirements
11.2 PCEP protocol security requirements
11.3 Discovering security requirements
12 PCE performance requirements
Appendix A (informative) PCE applied to WSON network
A.1 PCE applied to WSON path calculation requirements
A.2 WSON Routing and Wavelength Assignment PCEP Extension
Appendix B (informative) Interlayer PCE path calculation application
B.1 Overview
B.2 Inter - layer PCE path calculation model
B.3 Inter - layer PCE Route Control Model
Appendix C (informative) Reverse recursive path calculation (BRPC) mechanism Multi - domain application
C.1 Reverse Recursive Path Calculation (BRPC) Overview
Appendix D (informative) Application scenarios for PCE auto discovery
Appendix E (informative) path key (PathKey) to achieve the process of path confidentiality
E.1 path confidentiality implementation process
E.2 PKS Object PCEP Protocol Extension

Foreword

GB/T 21645 "Automatic Switching Optical Network (ASON) Technical Requirements" consists of the following components.

- Part 1. architecture and overall requirements;

- Part 2. Terms and definitions;

- Part 3. Data communication network (DCN);

- Part 4. Signaling;

- Part 5. User Network Interface (UNI);

- Part 6. Management Plans;

- Part 7. Automatic discovery;

- Part 8. Routing;

- Part 9. External network - Network interface (E-NNI);

- Part 10. Multilayer multi - domain control plane;

- Part 11. Path Computing Unit (PCE) and Protocol.

This part is part 11 of GB/T 21645.

This part is drafted in accordance with the rules given in GB/T 1.1-2009.

This part is made by the Ministry of Industry and Information Technology of the People's Republic of China.

This part is part of the Ministry of Industry and Information Technology (communications) of the People's Republic of China.

1 Scope

This part of GB/T 21645 specifies the Automatic Switching Optical Network (ASON) Path Calculation Unit (PCE) and protocol, which mainly includes.

PCE functional architecture, path computing capability, communication protocol requirements, PCE discovery requirements, communication channels, management requirements, security requirements, reliability Requirements and performance requirements.

This section applies to ASON networks and devices that use PCE for path calculation.

2 Normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this document. For undated references, the latest edition (including all modifications) applies to this document.

GB/T 21645.1-2008 Automatic switching optical network (ASON) technical requirements - Part 1: Architecture and overall requirements

IETFRFC2210 IETF Integrated Services RSVP Application (TheUseofRSVPwithIETFIntegratedServices)

IETFRFC2385 protects BGP sessions through the TCPMD5 signature option (Protection ofBGPSessionsviathe TCPMD5SignatureOption)

IETFRFC3471 GMPLS Signaling Function Description [GeneralizedMulti-ProtocolLabelSwitching (GMPLS) SignalingFunctionalDescription]

IETFRFC4328 G.709OTN Controlled GMPLS Extension [GeneralizedMulti-ProtocolLabelSwitching (GMPLS) SignalingExtensionsforG.709OpticalTransportNetworksControl]

IETFRFC4606 GMPLS extension for SONET/SDH control [GeneralizedMulti-ProtocolLabel Switching (GMPLS) ExtensionsforSynchronousOpticalNetwork (SONET) andSynchronous DigitalHierarchy (SDH) Control]

IETFRFC4655 PCE architecture [APathComputationElement (PCE) -BasedArchitecture]

IETFRFC5440 PCE communication protocol [PathComputationElement (PCE) CommunicationProtocol (PCEP)]

IETFRFC6003 Ethernet traffic parameter (EthernetTrafficParameters)

IETFRFC6205 wavelength exchange capacity (LSC) label switching router common tag encoding [GeneralizedLabelsfor Lambda-Switch-Capable (LSC) LabelSwitchingRouters]

3 Terms and definitions, abbreviations

3.1 Terms and definitions

The following terms and definitions apply to this document.

3.1.1 Path key-value sub-object

pathkeysub-sbject; PKS By the path key and PCEID two fields. The path key is encoded with 16 bits, representing a path; PCEID can be used

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 63 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 21645.1-2008Technical requirements for automatically switched optical network -- Part 1: Architecture and general requirements

Similar standards

GB/T 44225-2024|GB/T 28515.2-2021|GB/T 21645.10-2017|GB/T 14731-2008|GB/T 15837-2008|GB/T 16813-1997

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