ODUk Shared Protection Ring Service Switching Speed
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Solution Overview
Problem
Current ODUk shared protection rings in optical transport networks experience slow service switching due to serial processing of fiber cuts, which affects the efficiency of protection switching across multiple service groups.
Innovation Solution
A method and system that differentiate between high order ODUk1 group and individual switching conditions, enabling group switching when fault information matches high order ODUk1 criteria and individual switching otherwise, to accelerate service restoration and prevent incorrect switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If service switching is performed serially one by one for each protection group, then switching accuracy is maintained, but switching speed deteriorates
Solution Approach 1:
The patent merges multiple individual service switching operations into a single group switching operation. When a fiber cut is detected, instead of switching services one by one through serial processing, the system identifies affected services and switches them as a group simultaneously, significantly reducing switching time and improving service restoration speed.
Solution Approach 2:
The patent segments services into protection groups based on their routing characteristics. Services that share the same protection path are grouped together, allowing the system to apply group switching to entire segments rather than processing individual services serially, thus resolving the contradiction between switching speed and control complexity.
2Productivity
If group switching is performed for all services, then switching speed is improved, but switching accuracy deteriorates due to potential incorrect switching
Solution Approach 1:
The patent implements feedback mechanisms where node devices detect fiber cuts and communicate fault information to relevant nodes. The system receives confirmation feedback before executing group switching, ensuring that only services actually affected by the fiber cut are switched. This feedback loop maintains switching accuracy while enabling efficient group-based restoration.
Solution Approach 2:
The patent performs preliminary identification of affected services and protection groups before executing switching operations. By pre-calculating which services are impacted by a fiber cut and organizing them into appropriate groups, the system ensures accurate switching decisions are made in advance, preventing incorrect switching while maintaining high restoration efficiency.
Data Source
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AI summary
Embodiments of the present invention provide a method, a node device, and a system for shared protection in an optical transport network, and relate to the field of communications technologies. The method for shared protection in an optical transport network includes: obtaining, by a first node device, fault information, where the first node device is a node device that detects fault occurrence; determining, by the first node device, whether the fault information is a switching condition of a preset high order ODUk1 group; if yes, obtaining first information according to the fault information, and sending the first information to other node devices on a high order ODUk shared protection ring, to the other node devices to implement group switching of interrupted service according to the first information; if not, obtaining, by the first node device, second information according to the fault information, and sending the second information to the other node devices, so that the other node devices implement individual switching of interrupted service according to the second information. The present invention accelerates the speed of service switching.