Vertex disjoint routings of cycles over tori

We study the problem of designing a survivable WDM network based on covering the communication requests with subnetworks that are protected independently from each other. We consider here the case when the physical network is T(n), a torus of size n by n, the subnetworks are cycles and the communication scheme is all-to-all or total exchange (where all pairs of vertices communicate). We will represent the communication requests by a logical graph: a complete graph for the scheme of all-toall. This problem can be modeled as follows: find a cycle partition or covering of the request edges of Kn2 , such that for each cycle in the partition, its request edges can be routed in the physical network T(n) by a set of vertex disjoint paths (equivalently, the routings with the request cycle form an elementary cycle in T(n)). Let the load of an edge of the WDM network be the number of paths associated with the requests using the edge. The cost of the network depends on the total load (the cost ...

• Type: Journal
• Year: 2007
• Where: NETWORKS
• Authors: Jean-Claude Bermond, Min-Li Yu
• Keywords: Communication Requests, Computer Networks, NETWORKS 2007, Survivable Wdm Network, WDM Network