煤矿物联网灾后重构网络自组织节能分簇协议

Self-organized energy-efficient clustering protocol for post-disaster reconstruction network of coal mine IoT

针对灾后煤矿井下物联网传感节点能量难以及时补充的情况,提出一种基于两阶段簇头选举的节能分簇路由协议.该协议在初始簇头选举阶段,通过引入节点能量因子筛选出能量水平高于网络平均能量的节点作为候补簇头节点;根据相邻节点连通情况引入连通因子,基于能量因子与连通因子设计了灾后重构网络的选举概率函数,通过选举概率函数的计算进行簇头选举,形成初始分簇结构.在网络运行阶段,构建簇内选举簇头机制,通过周期性比较各簇簇头节点剩余能量和阈值能量的大小来决定是否更换簇头.仿真结果表明:采用该协议降低了煤矿物联重构网络的整体能耗,显著延长了重构网络的稳定周期,提升了重构网络的稳定性.

In view of the fact that it is difficult to replenish the energy of the sensor nodes of IoT(internet of things)in coal mines after the disaster,an energy-saving clustering routing protocol based on two-stage cluster head selection was proposed.In the initial cluster head election stage,the node energy factor was introduced to select the nodes whose energy level was higher than the average energy of the network as the alternate cluster head nodes.According to the connectivity of adjacent nodes,the connectivity factor was introduced,the election probability function of the post-disaster reconstructed network was designed based on the energy factor and connectivity factor.The cluster head was elected through the calculation of the election probability function to form the initial clustering structure.In the operation stage of the network,the mechanism of electing the cluster head within the cluster was constructed.Whether to replace cluster heads was decided by periodically comparing the residual energy and the threshold energy of each cluster head node.Simulation results show that the protocol can reduce the overall energy consumption of the coal mine IoT reconfiguration network,significantly prolong the stability period of the reconfiguration network,and improve the stability of the reconfiguration network.