Traffic Path Incorporation for ASON Recovery Bottlenecks
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Solution Overview
Problem
In Automatic Switched Optical Networks (ASON), the Path Computation Element (PCE) may experience delays in responding to traffic recovery requests due to being overwhelmed by multiple concurrent failures, leading to inefficient resource consumption and prolonged recovery times.
Innovation Solution
An apparatus and method that incorporates multiple failed traffic connections into groups sharing the same path, utilizing a path computation unit and traffic path incorporation unit to efficiently compute and assign available routes, reducing the burden on the PCE and enhancing recovery efficiency by storing and managing route information in a hash table.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the PCE computes routes for each failed traffic connection individually, then each traffic can receive dedicated route computation, but the PCE becomes overwhelmed and response delay increases
Solution Approach 1:
The patent merges multiple individual route computation requests into a single batch processing operation. When multiple traffic connections fail simultaneously, the system aggregates their route computation needs into one unified processing task, allowing the PCE to compute all routes in parallel rather than sequentially, thus reducing overall response time while maintaining dedicated route computation for each traffic flow
Solution Approach 2:
The patent implements preliminary action by pre-computing and caching route information for multiple failed traffic connections before actual recovery is needed. The system proactively processes route computations for all failed connections in advance, stores the results, and makes them immediately available when recovery is required, eliminating the need for time-consuming real-time computations during critical recovery scenarios
2Adaptability or versatility
If the PCE processes all route computation requests simultaneously, then comprehensive route options are available, but resource consumption and computational burden increase
Solution Approach 1:
The patent segments the route computation process into distinct phases: batch processing phase for initial route computation of multiple failed connections, and individual query phase for retrieving pre-computed routes. This segmentation allows comprehensive route options to be generated once in batch mode, then efficiently retrieved multiple times without repeating the computationally intensive processing, thereby reducing overall resource consumption while maintaining route option comprehensiveness
Solution Approach 2:
The patent changes the operational parameters of the PCE by switching between two modes: batch processing mode for computing multiple routes simultaneously with high computational resources, and query mode for retrieving pre-computed routes with minimal resource usage. This parameter change allows the system to provide comprehensive route options when needed while maintaining low resource consumption during normal operations
3Manufacturing precision
If individual route computation is performed for each traffic failure, then precise route optimization is achieved, but the complexity of the system increases
Solution Approach 1:
The patent implements a universal route computation interface that handles both batch processing of multiple traffic connections and individual route queries through the same system architecture. The PCE is designed with multi-functionality to perform both aggregate route computation and individual route optimization, eliminating the need for separate specialized systems and reducing overall system complexity while maintaining precise route optimization capabilities
Data Source
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AI summary
The disclosure discloses an apparatus and method for rerouting multiple traffics. The apparatus includes a path computation unit and a traffic path incorporation unit, the path computation unit forwards a received uniform route computation notification message including multiple pieces of failed traffic connection information to the traffic path incorporation unit, and also forwards a route inquiry request transmitted from the head node of the fault traffic to the traffic path incorporation unit; the traffic path incorporation unit analyzes and detects the failed traffic connection information according to traffic incorporating and route inquiry statistic algorithm, and uniformly obtains and records the recovery route information from the path computation unit; when receiving the route inquiry request forwarded by the path computation unit, the traffic path incorporation unit is further configured to search the record according to the route inquiry request, and return the found corresponding recovery route information to the head node which requests the recovery through the path computation unit. The disclosure uses a incorporating and uniform route inquiry method, the resource loss of the path computation unit is reduced, and the efficiency of link restoration is improved.