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In this paper, we study two fundamental issues of cooperative communications in distributed wireless networks, namely when to cooperate and whom to cooperate with. In specific, we focus on cross-layer medium access control (MAC) protocol design with beneficial node cooperation. To increase long-term network throughput, we propose an optimal grouping strategy for relay node selection, and devise a...
In this paper, we investigate benefits of cooperative communication in mobile ad hoc networks (MANETs). Cooperative communication as an effective way to mitigate channel impairments has attracted much attention, especially on the physical layer. However, without properly designed higher- layer protocols, the cooperation gain can decrease and even disappear, due to factors such as limited payload and...
In this paper, with the cross-layer design principle, a novel cooperative triple busy tone multiple access (CTBTMA) scheme is proposed for wireless networks to achieve cooperative diversity gain. A utility-based algorithm is presented to determine the capability of a node in helping other nodes' transmissions. With the use of three busy-tone channels, not only collisions can be avoided, but also an...
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