Logical topology design for dynamic traffic grooming in mesh WDM optical networks

Traffic grooming is an operation to consolidate client traffic onto lightpaths in the interworking of the optical network and client networks. Depending on whether the client traffic is static or dynamic, it can be classified into static and dynamic traffic grooming. This paper studies how to design logical topology (using minimum network resource) for dynamic traffic grooming, to meet the given traffic blocking probability requirements. We will formulate this problem into an integer linear programming (ILP) problem. In the formulation, we will consider wavelength assignment for lightpaths, and wavelength conversion in the optical network. The formulation is demonstrated to be highly effective for small to medium-size networks. Furthermore, for large networks, we propose a simple heuristic that can obtain near-optimal performance.