Wavelength Path Reallocation in Optical Mesh Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In transparent optical mesh networks without wavelength conversion, efficient use of wavelength bands is compromised by repeated setting and deletion of wavelength paths, leading to increased network equipment and inefficient accommodation of upper layer paths, with existing methods failing to decrease the number of used wavelength regions and not considering the order of wavelength path reallocation or its impact on operation cost.
Innovation Solution
A method for reallocating wavelength paths that designs a reallocation destination to minimize the number of used wavelength regions and operation cost, involving a wavelength path designing step to change the target path using free wavelengths, and an upper layer path reallocation method that calculates the number of communication apparatuses and costs to reduce the number of wavelengths in use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wavelength paths are repeatedly set and deleted in transparent optical mesh networks, then wavelength path flexibility is improved, but the number of used wavelength regions increases and wavelength utilization efficiency deteriorates
Solution Approach 1:
The patent applies parameter changes by systematically adjusting wavelength assignments during reallocation. When a wavelength path is deleted, the system changes the wavelength parameters of other paths to fill the freed wavelength regions, thereby reducing the total number of used wavelength regions while maintaining path flexibility through controlled reassignment.
Solution Approach 2:
The patent implements dynamic wavelength reallocation where wavelength assignments are not fixed but can be changed based on current network conditions. The system dynamically adjusts wavelength paths by calculating optimal reallocation sequences that minimize the number of used wavelength regions while responding to setting and deletion operations.
2Adaptability or versatility
If wavelength paths are repeatedly set and deleted, then network reconfigurability is improved, but network equipment quantity increases
Solution Approach 1:
The patent applies merging by consolidating wavelength path management functions into existing network equipment. Instead of adding separate reallocation devices, the system combines wavelength reallocation capabilities with current wavelength path setting and deletion equipment, thereby improving reconfigurability without increasing equipment quantity.
3Ease of operation
If wavelength paths are reallocated without considering order, then reallocation simplicity is improved, but operation cost increases
Solution Approach 1:
The patent applies preliminary action by calculating and determining the optimal reallocation order before executing wavelength path reallocation. The system performs advance calculations to identify the sequence that minimizes operation cost, such as reducing the number of wavelength changes and equipment operations, thereby lowering energy consumption and operation costs while maintaining systematic reallocation.
4Speed
If wavelength paths are reallocated without considering free resource amount, then reallocation speed is improved, but reallocation success rate deteriorates
Solution Approach 1:
The patent applies feedback by continuously monitoring the amount of free wavelength resources during the reallocation process. The system uses this feedback information to adjust the reallocation strategy in real-time, selecting paths and wavelengths that are guaranteed to have sufficient free resources, thereby ensuring reallocation success while maintaining efficient processing speed.
5Ease of operation
If upper layer paths are not considered in wavelength path reallocation, then wavelength path reallocation simplicity is improved, but upper layer path accommodation efficiency deteriorates
Solution Approach 1:
The patent applies universality by creating a unified reallocation framework that simultaneously considers both wavelength paths and upper layer paths. The system performs multi-level reallocation where wavelength path changes are coordinated with upper layer path requirements, enabling a single reallocation process to optimize both layers and improve upper layer path accommodation efficiency without significantly increasing operational complexity.
Data Source
AI summary
A wavelength path reallocation method in a path reallocation apparatus for reallocating a wavelength path set in a communication network, including: a wavelength path designing step in which a wavelength path designing unit designs a reallocation destination wavelength path by performing calculation such that the number of use frequency regions in the communication network becomes smaller than a corresponding value before reallocation; and a wavelength path setting step in which a wavelength path setting unit changes a reallocation target wavelength path to the reallocation destination wavelength path by using free wavelength.