OBS Link Protection via Dynamic Resource Sharing
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Solution Overview
Problem
Current optical burst switching (OBS) networks lack efficient protection and restoration mechanisms, leading to low network efficiency and inability to guarantee transmission reliability, especially in high-speed transmission environments, due to the limitations of conventional line switching techniques.
Innovation Solution
A method for protecting and restoring links in OBS networks using dynamic multiplexing, real-time calculation of restoration wavelengths, and dynamic resource sharing, which actively allocates multi-channel transmission links based on network load and implements optical label merging to ensure high reliability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If passive protection and restoration mechanisms are applied in OBS networks, then transmission reliability is improved, but network efficiency deteriorates due to wavelength reservation overhead
Solution Approach 1:
The patent implements dynamic resource sharing where protection wavelengths are not permanently reserved but dynamically allocated based on real-time network conditions. The restoration wavelength calculator computes required wavelengths according to current load, enabling the system to adapt between transmission reliability and network efficiency based on actual demand rather than static reservation
Solution Approach 2:
The system changes the parameter of wavelength allocation from fixed reservation to dynamic calculation. The restoration wavelength calculator adjusts the number of protection wavelengths based on network load conditions, transforming the static parameter into a dynamic one that optimizes both reliability and efficiency
2Productivity
If restoration wavelengths are calculated in real-time based on network load, then wavelength utilization efficiency is improved, but system complexity increases
Solution Approach 1:
The restoration wavelength calculator operates autonomously based on observed network load conditions. The system monitors its own state and automatically computes required protection wavelengths without external intervention, reducing operational complexity while maintaining high utilization efficiency
Solution Approach 2:
The system implements feedback mechanisms where the restoration wavelength calculator continuously monitors network load and adjusts protection wavelength allocation accordingly. This closed-loop control enables efficient resource utilization while managing complexity through automated adaptation rather than manual configuration
3Productivity
If optical label merging is used for dynamic multiplexing, then network efficiency is improved, but transmission reliability may deteriorate due to wavelength mixing problems
Solution Approach 1:
The restoration wavelength calculator acts as an intermediary that manages the complexity of optical label merging. It computes and coordinates wavelength assignments, ensuring that dynamic multiplexing operations maintain transmission reliability by preventing wavelength conflicts through centralized calculation and control
Data Source
AI summary
Disclosed herein is a method for protecting and restoring a link in an OBS network. The method includes a step of transmitting/receiving a liveness-confirming message for confirming liveness of the link between an up-node and a down-node respectively connected to both ends of the link at a predetermined message transmission period, to judge whether a fault is generated on the link, a step in which the up-node and down-node respectively update link information when it is judged that the link fault is not generated, and a step of restoring the link having the fault using predetermined restoration channel information based on an offered load measured when the link is in a normal state when it is judged that the link fault is generated. Accordingly, a link having a problem can be effectively protected and restored in the OBS network.