Routing for concurrent video sessions in ad hoc networks

In this paper, we consider the problem of how to optimally support multiple concurrent video sessions in an ad hoc network. Specifically, we present a framework on modeling the end-to-end video distortion as a function of routing layer behavior. Our formulation seamlessly integrates the interactions of competing video flows and network layer performance metrics, thus allowing optimal utilization of network resource. We describe a detailed solution procedure based on genetic algorithms (GAs), which allows joint determination of near-optimal routes and rates for the video sessions. We also present a greedy heuristic algorithm that can produce near-optimal solutions and speed up the GA computation. Through simulation results, we demonstrate the superior performance of the GA-based approach.