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This paper considers the problem of joint congestion control and scheduling in wireless networks with Quality of Service (QoS) guarantees. Different from per-destination queueing in the existing works, which is not scalable, this work considers per-link queueing at each node, which significantly reduces the number of queues per node. Under per-link queueing, the authors formulate the joint congestion control and scheduling problem as a Network Utility Maximization (NUM) problem and use a dual decomposition method to separate the NUM problem into two sub-problems, i.e., a congestion control problem and a scheduling problem. Then, they develop a Sliding Mode (SM) based distributed congestion control scheme, and prove its convergence and optimality property.
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