Optical Path Routing With Integrated Transmission Mode Selection
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Solution Overview
Problem
Existing methods fail to determine an optimal transmission mode simultaneously with a route in optical networks with a large number of transmission modes, leading to suboptimal solutions when the transmission mode is designed separately from the route and frequency.
Innovation Solution
An optical path design device and method that generates an auxiliary graph with edges representing existing and new wavelength paths, sets transmission schemes and frequencies, and searches for a route to determine the transmission mode and frequency simultaneously, using a graph generation unit, search unit, and design unit to accommodate path demands in wavelength paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the transmission mode is designed separately from the route and frequency, then the state management is facilitated, but the range of possible solutions is narrowed and the outputted solution may deviate from the optimal solution
Solution Approach 1:
The patent merges the transmission mode selection with the route determination process by integrating transmission mode information into the auxiliary graph edges. The search unit simultaneously determines both the route and transmission mode by searching for the shortest path in the auxiliary graph, which contains edges with transmission mode attributes. This integration allows the system to explore all possible combinations of routes and transmission modes to find the optimal solution while maintaining manageable state through the graph structure.
2Manufacturing precision
If the transmission mode is determined simultaneously with the route, then the optimal solution is achieved, but the design complexity increases
Solution Approach 1:
The patent introduces an auxiliary graph as an intermediary data structure that simplifies the simultaneous determination of route and transmission mode. The auxiliary graph represents the optical network topology with edges annotated by transmission mode information and weights. By transforming the complex joint optimization problem into a shortest path search problem on this auxiliary graph, the system achieves optimal solutions without requiring complex iterative optimization algorithms or exhaustive search methods.
3Adaptability or versatility
If there are a large number of transmission modes, then the transmission flexibility is increased, but the difficulty of selecting the best mode increases
Solution Approach 1:
The patent changes the representation of transmission modes from a separate selection process to an integrated parameter within the auxiliary graph edge structure. Each edge in the auxiliary graph is annotated with transmission mode information, including parameters such as modulation scheme and bit rate. The search unit uses these annotated parameters to evaluate and compare different transmission modes automatically during the shortest path search, eliminating the need for manual or complex automated selection processes and reducing the difficulty of identifying the best mode among many options.
Data Source
AI summary
The demand acquisition unit acquires the path demand indicating a start point and an end point of communication and a required communication capacity. The graph generation unit generates an auxiliary graph in which a plurality of nodes are connected by an existing edge and a new edge. In the auxiliary graph, the transmission scheme and the frequency of the wavelength path and the weight are set for each edge. The search unit searches for a route indicated by the path demand for the auxiliary graph on the basis of the weight. The design unit sets a wavelength path in the optical communication path by the transmission scheme related to the new edge included in the searched route, and accommodates the path demand in the wavelength path at a frequency related to each edge included in the route.