连通和覆盖性优化无线传感器网络寿命的方法

A method to improve connectivity and coverage for network lifetime optimization in wireless sensor networks

针对多跳无线传感器网络的特点,基于拓扑结构的连通和覆盖性建立节点的休眠调度模型,提出了一种优化网络寿命的新方法(CCLO).该方法设计了一种根据节点剩余能量动态激活一组满足连通覆盖条件的工作节点.当某个节点因能量耗尽而失效时,其邻近的休眠节点将代替失效节点继续维持网络的正常工作.理论分析和仿真研究表明:CCLO能够快速有效地判别冗余节点,将判别过程的复杂度从NlogN降低到ni,保证无线传感器网络的覆盖性和连通性的同时降低能耗,延长网络寿命.

A sleeping schedule scheme was constructed based on the connectivity and coverage of topology structure for network lifetime optimization（CCLO） in light of the features of a multihop wireless sensor network.By applying this approach,a mechanism that dynamically activated an optimal covering and connected a subset of sensors was proposed based on residual energies of nodes.When a lapse occurred on a certain sensor,the adjacent sleeping nodes could replace the failure node and continue sensing the information of the scenario.The theoretical analysis and simulation results show that CCLO can identify the redundant node quickly and effectively,which ensures the connectivity and coverage of the wireless sensor networks and reduces its energy costs,thus prolonging the network lifetime.