Optical Network Management Device Backup Path Bandwidth Compression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical backbone networks face challenges in achieving fault recovery during multiple failures without compromising the usage efficiency of optical networks, as they require multiple wavelength resources for backup paths, leading to decreased efficiency.
Innovation Solution
An optical communication system with an optical network management device that sets backup paths with compressed bandwidth on different physical routes, allowing for failure-case backup paths to be established without failures, using an optical node device with transceivers for transmitting and receiving signals via failure-case backup path information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple backup paths are established for fault recovery, then reliability is improved, but optical frequency resource usage efficiency deteriorates
Solution Approach 1:
The patent implements dynamic bandwidth allocation where backup paths can flexibly adjust their resource consumption. During normal operation, backup paths use minimal resources (e.g., 1/8 or 1/4 of full bandwidth). When failures occur, the system dynamically reallocates bandwidth to affected backup paths, allowing them to expand and utilize previously reserved but unused capacity from other backup paths.
Solution Approach 2:
The system changes the bandwidth parameter of backup paths based on operational conditions. Backup paths transition between different bandwidth states: minimal allocation during normal operation, and expanded allocation when failures occur. This parameter change enables the same physical infrastructure to support both high reliability (multiple backup paths) and efficient resource usage (dynamic bandwidth adjustment).
2Reliability
If backup paths use full bandwidth for failure recovery, then reliability is improved, but network resource efficiency deteriorates
Solution Approach 1:
The patent applies partial action by allocating only the necessary minimum bandwidth to backup paths during normal operation (e.g., 1/8 or 1/4 of full bandwidth). This partial allocation is sufficient to maintain signal integrity and enable rapid failover, while avoiding the excessive resource consumption that would occur if full bandwidth were reserved for all backup paths at all times.
Solution Approach 2:
The patent makes backup path bandwidth universally shared among multiple backup paths. The same physical bandwidth resources serve multiple functions: they can be used by any backup path that needs them during failures. This multi-functionality allows the network to maintain multiple backup paths for reliability while efficiently utilizing the same physical infrastructure across different failure scenarios.
3Reliability
If multiple wavelength slots are allocated to backup paths, then fault recovery is enabled, but wavelength resource utilization deteriorates
Solution Approach 1:
The patent merges the bandwidth resources of multiple backup paths into a shared pool. Instead of dedicating separate wavelength slots to each backup path, the system combines available bandwidth from multiple sources and dynamically assigns it to backup paths that need it during failures. This merging enables the network to support multiple backup paths while utilizing wavelength resources more efficiently.
Data Source
AI summary
It is difficult in an optical network to achieve fault recovery in case of multiple failures without decreasing the usage efficiency of the optical network; therefore, an optical communication system according to an exemplary aspect of the present invention includes an optical network management device including an optical path setting means for setting, to a physical route differing from each other, a backup path corresponding to each of a plurality of active paths on an identical physical route, and a failure-case optical path setting means for setting a failure-case backup path with a compressed band of the backup path, to a physical route without a failure in a case where failures arising on more than one physical route among the physical routes; and an optical node device including an optical transceiver means for transmitting and receiving optical signals using failure-case backup path information resulting from setting by the failure-case optical path setting means.