SRV6 Binding Information Notification via Extended PCEP

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Solution Overview

Problem

Current techniques fail to notify Segment Routing Traffic Engineering (SR-TE) path binding information to Path Computation Element (PCE) for IPv6 Segment Identifier (SID) in network communication, hindering end-to-end traffic engineering policies.

Innovation Solution

A method and device that acquire SR-TE path information, bind IPv6 SID to obtain SRV6 binding information, and notify it to a preset node through an extended Path Computation Element Protocol (PCEP), enabling the binding of SR-TE paths to IPv6 SID and passing the binding information between nodes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If SRV6 binding information is allocated and notified through extended PCEP, then end-to-end traffic engineering policy implementation is enabled, but the complexity of the notification mechanism increases

Engineering Contradiction:

Improvetraffic engineering policy implementationVSAvoidnotification mechanism complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The notification mechanism is segmented into distinct functional components: path computation elements that allocate SRV6 binding information, nodes that receive and store this information, and extended PCEP messages that transmit the data. This segmentation allows each component to handle specific tasks independently, making the overall complex system more manageable and easier to implement.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The extended PCEP protocol acts as an intermediary mechanism between path computation elements and network nodes. It provides a standardized interface for transmitting SRV6 binding information, abstracting the complexity of the notification mechanism from the individual nodes while enabling end-to-end traffic engineering policy implementation.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If SRV6 binding information is locally allocated by PCC and notified to PCE, then path forwarding capability is improved, but the difficulty of implementing the notification technique increases

Engineering Contradiction:

Improvepath forwarding capabilityVSAvoidnotification technique implementation

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

The system performs preliminary actions by having path computation elements allocate SRV6 binding information before path setup is complete. This preliminary allocation enables nodes to prepare forwarding capabilities in advance, improving path forwarding performance while the standardized extended PCEP protocol simplifies the implementation of the notification technique.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The extended PCEP protocol introduces new parameters and message types specifically for carrying SRV6 binding information. By changing the protocol parameters to accommodate this new functionality, the patent enables path forwarding capability while maintaining implementation simplicity through standardized parameter definitions rather than requiring complex custom protocols.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11381502B2Method and device for notifying binding information, and storage medium

Publication Date: 2022.07.05 NANJING ZTE NEW SOFTWARE CO LTD

AI summary

A method for notifying binding information, including: acquiring, by an allocation node, SR-TE path information; binding, by the allocation node, an IPV6 SID corresponding to the SR-TE path information with the SR-TE path information so as to obtain SRV6 binding information between the SR-TE path information and the IPV6 SID; and notifying, by the allocation node, the SRV6 binding information to a preset node through an extended PCEP.