Centralized Path Computation for Optical Network Resource Optimization

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Solution Overview

Problem

Existing automatically switched optical network (ASON) technologies face resource collisions and inability to optimize global resources, leading to failed service connections and inefficient resource allocation during link failures.

Innovation Solution

A service operation method and device that determine service information across multiple nodes in a distributed network, compute centralized restore paths, and operate services using these paths to avoid resource collisions and optimize resource allocation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If distributed PCEs are used for service path computation, then each PCE can independently compute service paths for its local node, but resource collision occurs and global resource optimization cannot be performed

Engineering Contradiction:

ImproveIndependent computation capabilityVSAvoidResource collision

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent merges the functionality of multiple distributed PCEs into a single centralized PCE that computes service paths for all nodes in the optical network. This centralized approach eliminates resource collisions by having one authority manage all path computations globally, while still maintaining the operational independence of individual nodes through the centralized PCE's coordinated path assignment.

Inventive Principle:

Principle #5Merging (Combining)

2Productivity

If distributed PCEs are used for service path computation, then computation can be performed at local nodes, but global resource optimization cannot be achieved

Engineering Contradiction:

ImproveLocal computation efficiencyVSAvoidGlobal resource allocation

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The centralized PCE performs multiple functions: it computes service paths for all nodes in the network, optimizes global resource allocation, and coordinates path establishment across the entire optical network. This universal approach enables the single PCE to handle both local computation needs and global optimization requirements that distributed PCEs cannot achieve independently.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If centralized path computation is implemented, then global resource optimization can be performed, but computation complexity increases

Engineering Contradiction:

ImproveGlobal resource optimizationVSAvoidComputation complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the path computation process into distinct phases: first determining available resources across the network, then computing optimal paths for each service based on those resources. This segmentation of the computation task into sequential steps reduces the overall complexity of centralized path computation while maintaining global optimization capabilities.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11757762B2Service operation method and device, and storage medium and electronic device

Publication Date: 2023.09.12 ZTE CORP

AI summary

Provided are a service operation method, a service operation device a storage medium and an electronic device. The method includes: determining service information about multiple nodes in a distributed network after determining a link failure in the distributed network, computing a restore path centralizedly for services indicated by the service information about the multiple nodes, and operating the services by using the restore path.