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Network topology has significant impacts on network capacity. The channel capacity, as one of the important aspects of network capacity, can be enhanced by the emerging cooperative communications. However, new challenges are arisen for topology control in Mobile Ad hoc NETworks (MANETs) and they merit further research. In this paper, the authors investigate the topology control problem with cooperative communications and propose a novel Capacity-Optimized COoperative (COCO) topology control scheme, where both upper layer network capacity and physical layer relay selections are considered. In addition, only the channel estimate, not the perfect channel status, is assumed known in the scheme. The topology control problem in MANETs is formulated as a discrete stochastic optimization problem, which can be solved using a stochastic approximation approach.
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