Optical Path Design Apparatus for Wavelength Division Multiplexing
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Solution Overview
Problem
In optical communication networks using wavelength division multiplexing, the accommodation efficiency for optical paths decreases when optical frequency slots are used concentrically in a specific optical fiber, making it difficult to efficiently utilize the network.
Innovation Solution
An optical path design apparatus that selects route candidates based on communication demand and allocates optical frequency bands to each optical fiber, determining the optimal path based on the optical frequency band utilization rate to prevent local concentration of frequency slots and increase accommodation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If optical frequency slots are allocated to optical paths using conventional methods, then the optical path can be established, but the optical frequency slots tend to concentrate locally in specific optical fibers, reducing accommodation efficiency
Solution Approach 1:
The patent applies local quality by making the frequency slot allocation adaptive to local conditions in different optical fibers. The allocation unit determines the number of frequency slots to allocate to each optical path based on the specific utilization state of each optical fiber, rather than using a uniform allocation method. This localized adaptation prevents frequency slot concentration in specific fibers and improves overall accommodation efficiency.
Solution Approach 2:
The patent changes the parameter of frequency slot allocation from a fixed or uniform approach to a dynamic approach based on utilization rates. The allocation unit calculates the utilization rate of each optical fiber and adjusts the number of frequency slots allocated to subsequent optical paths accordingly. This parameter change enables the system to adapt to varying network conditions and prevent local concentration of frequency slots.
2Productivity
If the number of optical paths is increased without adding communication resources, then resource utilization efficiency improves, but it becomes difficult to prevent local concentration of frequency slots
Solution Approach 1:
The patent implements feedback by having the allocation unit continuously monitor the utilization rate of frequency slots in each optical fiber and use this information to adjust subsequent allocation decisions. The system feeds back the utilization state to the allocation logic, which then modifies the number of frequency slots allocated to new optical paths. This feedback mechanism enables efficient resource utilization while preventing frequency slot concentration without requiring additional communication resources.
Solution Approach 2:
The patent applies self-service by enabling the frequency slot allocation system to automatically adjust its behavior based on the current network state. The allocation unit independently determines the optimal number of frequency slots to allocate to each optical path based on the utilization rates of existing fibers, without requiring external intervention or complex manual management. This self-adjusting mechanism simplifies the management of frequency slot allocation even as the number of optical paths increases.
Data Source
AI summary
In an optical communication network using the wavelength division multiplexing system, the accommodation efficiency for the optical paths decreases, and it becomes difficult to use the optical communication network efficiently, if the optical frequency slots are used concentrically in a specific optical fiber; therefore, an optical path design apparatus according to an exemplary aspect of the present invention includes route candidate selection means for searching for a route of an optical path to accommodate a communication demand and selecting a plurality of route candidates; optical path candidate selection means for selecting a plurality of optical path candidates by allocating an optical frequency band required to accommodate the optical path to each of optical fibers on the plurality of route candidates; and optical path determination means for determining the optical path from among the plurality of optical path candidates based on an optical frequency band utilization rate in the optical fibers.