无线传感器网络能量感知增强树型路由协议研究

Research on Energy-Aware Enhanced Tree Routing Protocol for Wireless Sensor Networks

现有的无线传感器网络路由协议普遍采用设定固定最小能量阈值的方法来避免低剩余能量的节点被选为数据转发节点,以防止因节点过早死亡而导致的网络结构破坏。然而这种方法缺乏应用灵活性。在本研究提出的能量感知增强树型路由协议中,设定了随着网络整体能量下降而动态变化的节点剩余能量阈值,以使得网络中所有节点的能量均衡下降,且采用了同质化加权求和的方法将邻居节点节省的路由跳数和剩余能量同时考虑进路由决策过程。最后,实验结果显示该协议可进一步提高网络稳定性。

To avoid network structure being destroyed by early death of nodes with low residual energy for being selected as forwarding nodes,the current wireless sensor network routing protocols generally use a fixed residual energy threshold approach. However,this approach lacks flexibility in application. An Energy-Aware Enhanced Tree Routing（ EAETR） protocol is proposed in this study,in which a dynamic residual energy threshold is set to change as node energy decreases so that network energy declines in a balanced way,and a homogenization weighted sum is used to consider both saving hops and residual energy of a neighbor node in the routing decision process. Stimulation results show that the protocol can further improve network stability.