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In this paper, the authors focus on the wireless coverage extension and nodes' cooperation. They propose a new protocol based on an incentive approach and a scheduling algorithm in order to reward cooperative nodes. The cost of cooperation can be prohibitively expensive in terms of QoS and energy consumption which does not motivate some nodes to cooperate. Therefore, they introduce a percentage of cooperation and QoS parameters in the scheduling algorithm called CEI in order to incite potential mobile relaying nodes to cooperate and in turn extend the wireless areas. They use the cross-layer approach in order to optimize the QoS parameters.
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