延长实时无线传感器网络生命周期的能量平衡路由

Prolonging Lifecycle of Energy Balance Routing in Real-Time Wireless Sensor Networks

为了延长实时无线传感器网络的生命周期,在二阶段定向扩散协议(DD)的基础上,设计了一种实时路由协议(EBR).该协议可收集到所有的、通过接收器节点发送的兴趣信息的实时路径立体空间测量误差(MPE)值,源节点通过选择最优的MPE值来决定探测数据信息的发送路径,这样接收器节点最终得到的数据传输路径可满足路由实时性要求,同时保持网络的全局能量平衡.仿真实验表明,EBR的全局能量平衡能力优于DD,并能有效延长网络的生命周期.在同等条件下,EBR提供的网络实时服务时间比DD多4.37%,采用EBR的网络生命周期比DD长44.6%.

To prolong the lifecycle of real-time wireless sensor networks, a real-time routing protocol （EBR） was designed based on two phases directed diffusion （DE））. EBR can receive all real time paths＇ MPE of interest messages sent by receiver nodes. The sending node determines the sending path of exploratory data message through selecting the optimal MPE value. Thus, the final obtained path of receiver node for data transfer can satisfy the demands of real-time application while keeping the network global energy balance. Simulation results show that EBR outper forms DD in global energy balance ability and can efficiently prolong the network lifecycle. The real-time service time provided by EBR is 4.370% more than DD and the network lifecycle is 44.6% longer than DD under the same conditions.