Joint Congestion Control and Wireless-Link Scheduling for Mobile TCP Applications

We consider joint congestion control and wireless link-scheduling design for mobile TCP applications. Adopting queueing delay as the congestion measure, we show that the optimal TCP congestion control and link scheduling scheme amounts to window-control oriented implicit primal-dual solvers for underlying network utility maximization. Based on this idea, we develop readily deployable, scalable yet optimal TCP congestion control schemes for the Internet with coupled wireless links, provided that the wireless access point performs a queueing-delay based link scheduling. Global convergence/stability of the proposed schemes to optimal network equilibrium is proved using a Lyapunov method. Simulation results are provided to evaluate the proposed schemes in practical network environments.