延长无线传感器网络生存周期的跨层算法

Cross-Layer Algorithm for Prolonging the Lifetime of Wireless Sensor Networks

为了延长无线传感器网络(WSNs)的生存周期,提出了联合优化物理层和网络层的跨层算法.首先通过物理层的功率控制方法,初步确定可能参与通信传输的传感器节点候选集;然后在节点候选集中,综合考虑传感器节点的接入概率、端到端通信链路的单跳成功传输概率和端到端通信链路的能量效率,以达到均衡性地进行网络层路由选择的目的,实现传感器网络的端到端通信传输过程.仿真结果表明,在保证能量效率的同时,该算法可以有效地延长无线传感器网络的生存周期.

To prolong the lifetime of wireless sensor networks（WSNs）,a cross-layer algorithm in terms of physical layer and network layer is proposed.Based on power control in the physical layer,the preliminary candidate sensor nodes for potential transmission are decided.Subsequently,considering the access probability of each sensor node,the per-hop transmission success probability,and the energy efficiency of end-to-end transmission links,an equilibrium routing of network layer is accomplished.Thus the end-to-end communication can be achieved in WSNs.Simulation result show that the cross-layer strategy can prolong the system lifetime of WSNs with energy efficiency.