A fair power-efficient cross-layer relay selection based on Priority and Buffer Management

Recently, cross-layer relay selection methods are proposed in favor of providing QoS requirements of users in multi-user cooperative networks as a way to achieve a better performance. However, most of them have failed to achieve an acceptable level of fairness in satisfying diverse QoS requirements in a multi-media service. On the other hand, reducing consumed power is essential today in cooperative networks. In this paper, we aim to improve fairness and reduce consumed power in a multi-user cooperative network with multi-media service. For this purpose, we propose a novel algorithm based on management of relay nodes´ buffer space and the priority concept during relay selection. Simulation results certify that our algorithm outperforms previous ones in terms of system spectrum efficiency, fairness, and average consumed power.