煤矿巷道无线传感器网络的LEACH协议改进

Improvement of LEACH protocol in wireless sensor network of coal mine roadway

将LEACH协议应用于环境复杂的煤矿巷道中存在不足,为了使LEACH协议更适用于煤矿巷道,对LEACH协议进行改进。首先,本文对选择簇头的阈值函数进行调整,加入节点剩余能量、位置信息以及邻节点数量因素;其次,改进建簇算法,节点通过计算与簇头节点和汇聚节点之间的距离来判断加入簇头还是与汇聚节点直接通信;最后,改进簇间通信机制,簇头之间通过多跳方式进行数据传输,并根据能量和距离信息选择下一跳簇头节点,提高簇间数据传输的可靠性。仿真实验表明,改进后的LEACH协议可以有效降低煤矿巷道无线传感器网络能耗,延长网络生命周期。

There are shortcomings in applying LEACH protocol to coal mine roadway with complex environment.LEACH protocol is improved to make it more applicable to coal mine roadway.Firstly,this paper adjusts the threshold function of cluster head selection,and adds the factors of node residual energy,location information and the number of neighboring nodes.Secondly,the cluster building algorithm is improved.The node determines whether to join the cluster head or to communicate with the aggregation node directly by calculating the distance to cluster head nodes and aggregation nodes.Finally,the inter cluster communication mechanism is improved.The cluster heads transmit data through multi hop mode,and select the next hop cluster head node according to the energy and distance information,which improves the reliability of inter-cluster data transmission.The simulation results show that the improved LEACH protocol can effectively reduce the energy consumption of wireless sensor networks in coal mine roadway and extend the network life cycle.