无线网络中基于共享节点高能效的协同通讯

With the increasing of the number of mobile devices, energy-efficiency and quality-of-service (QoS) are both important for wireless network.In the recent years, cooperative communication (CC) has been proposed to achieve spatial diversity without additional equipments and antennas.It is indicated that a good relay assignment scheme of CC is effective in improving energy-efficiency greatly in many literatures.In this paper, we first introduce the feasibility of shared relay assignment to improve the energy-efficiency. Then, the Minimum Energy Consumption for capacity requirement (MEC) problem of CC with shared relay will be defined, and we show it is NP-hard. We propose a heuristic algorithm (SRAE) to solve this problem, which is based on the thought of greedy algorithm. We conduct abundant simulation experiments to evaluate the performance of our proposed algorithm. The simulation results show that the SRAE algorithm can save about 54% energy consumption in wireless network.