### Energy-efficient relay select algorithm in wireless cooperative networks

SU Hong1, TANG Hao2, ZHOU Lei1, JIANG Qi2

1. 1.School of Computer Science and Information, Hefei University of Technology, Heifei 230009, China
2.School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China
• Online:2013-09-01 Published:2013-09-13

### 无线协作网络中的能量有效性中继选择算法

1. 1.合肥工业大学 计算机与信息学院，合肥 230009
2.合肥工业大学 电气与自动化学院，合肥 230009

Abstract: In this paper, the relay selection problem in the wireless cooperative networks is studied and the buffering capability of relay nodes is enabled. An energy-efficient relay select algorithm with buffer is proposed to prolong the network lifetime and the system throughput is improved. This algorithm takes into account instantaneous channel state information, remaining energy and the queuing states. The best relay for receiving and the best relay for transmitting are selected respectively by different weighting functions. The power allocation between the source node and the relay node is considered to reduce the packet loss rate caused by the difference of channel rate between source node to relay node and relay node to destination. Simulation results show that this algorithm prolongs the network lifetime efficiently and improves network throughput significantly as the number of relays increases and the packet loss rate reduces after considering the power allocation.