单跳无线广播网络中能耗优化算法研究

Energy consumption algorithm for wireless single-hop broadcast networks

文章针对单节点的无线网络中发送节点速率和功率均可调整的情形,研究了一种优化网络的能量消耗以及传输时间和能量消耗乘积的算法。首先利用基于机会的网络编码(completely opportunity encoding,COPE)算法来确定编码方式,在确定编码方式的前提下提出了一种启发式的速率功率选择发送算法(rate and power adjustment algorithm,RPAA),该算法的主要特点是充分考虑了网络的功率和速率变化对网络性能的影响。结果表明,与经典的COPE算法以及基于中继的编码算法(network coding with relay assistance,NCRA)相比,RPAA算法能够很大程度地减少网络的能量消耗以及传输时间和能量消耗的乘积。

In view of the fact that the transmission rate and power in wireless single node network are adjustable, an algorithm for optimizing the network energy consumption and the product of transmission time and energy consumption is studied. Firstly, the encoding mode is determined by using completely opportunity encoding（COPE） algorithm. Then a heuristic algorithm called rate and power adjustment algorithm（RPAA） is proposed. The algorithm fully considers the power and rate changes which affect the performance of network. The simulation results show that compared with classical COPE algorithm and network coding with relay assistance（NCRA）, RPAA algorithm can greatly reduce the network energy consumption and the product of transmission time and energy consumption.