基于故障节点无线传感网络的数据汇聚算法

摘要

The node of wireless sensor network(WSN)is liable to fault because the influence of the nuclear radiation envi-ronment and limitation of node energy,so how to realize effective data aggregation based on fault nodes in WSN environment has become the research hotspot. The influence of nuclear radiation on RF communication ability of nodes is studied. The data gathering protocol for radiation affected(DGP-RA)algorithm for WSNs data aggregation under nuclear radiation restraint is pro-posed,in which the node has dual modes of radio frequency communication and acoustic communication. The DGP-RA algo-rithm based on reward and punishment mechanism,Dempster Shafer theory(DST)and hypothesis testing theory are used to identify the fault node which can′t communicate because the influence of nuclear radiation,and switch the communication modes adaptively to resist the radiation influence. The simulation results show that the DGP-RA algorithm can improve the data transmission efficiency effectively and reduce the energy consumption.%核辐射环境的影响和节点能量的有限性,导致无线传感网络(WSNs)节点容易发生故障,如何在基于故障节点WSNs的环境实现有效的数据汇聚已成为研究热点.首先,研究了核辐射对节点射频通信能力的影响,并提出基于核辐射约束下的WSNs的数据汇聚DGP-RA算法.在DGP-RA算法中,节点具有射频和声通信的双通信模式.DGP-RA算法基于奖惩机制,并结合D-S证据理论DST和假设检验理论,识别因核辐射影响而无法通信的故障节点,然后再适应地切换通信模式,抵御辐射影响.仿真结果表明,提出的DGP-RA算法有效地提高了数据传输效率,降低了能量消耗.