Joint Congestion Control and Power Control With Outage Constraint inWireless Multihop Networks

We consider the problem of joint congestion control and power control with outage constraint in an interference-limited multihop wireless network. We transform the original nonconvex problem into a convex programming problem and develop a message-passing distributed algorithm that can attain the global optimal source rate and link transmit power. This algorithm however requires a larger control message size than that of the conventional scheme, which increases network overheads. We continue to develop a practical near-optimal distributed algorithm that only requires local signal-to-interference ratio (SIR) measurement to limit the size of the message. Numerical results show that both schemes have nearly identical performance and outperform the conventional scheme.