A cross-layer design for joint lifetime and data rate optimization in wireless networks

In this paper, we study the problem of jointly maximizing network lifetime and data rate in wireless networks. For this problem, we introduce a cross-layer formulation with general NUM (network utility maximization) that accommodates routing, scheduling and stream control from different layers of network with relevant constraints. In particular, based on a lagrangian approach, we extend our programming model to a distributed algorithm that can dynamically approximate the optimal solution to this problem. Finally, we present computational results to confirm the benefits that can be gained from the cross-layer optimization and the distributed algorithm.