无线感测网络上节能的事件驱动数据汇集机制

Energy Efficient Event-Driven Data Gathering in Wireless Sensor Networks

针对无线感测网络上动态改变的事件,设计一套有效率的数据汇集机制.采用网格架构,建立数据汇集树将事件数据传送至汇集点.在初始建立数据汇集树架构时便尽量减少多余的回传节点,以减少感测点的能量消耗.而在事件产生变动时,可应事件变化的调整机制让树架构依然有效率的运作.本文提出的方法与无线感测网络中的3个数据汇集技术EADA、Dual-Tree-Based和Range Query做比较,仿真结果显示本文的方法能够有效的延长网络存活时间,且在总能量消耗及系统开销(overhead)皆有良好表现.

We propose an energy efficient event-driven data gathering protocol in wireless sensor networks which focuses on dynamic events.Based on the grid structure,our protocol constructs and maintains a data gathering tree to adapt the dynamic events.The energy is preserved by avoiding redundant forwarding nodes to join the data gathering tree.In the dynamic event environment,trees update mechanisms are also presented to ensure the efficiency of the proposed scheme.Finally,we compare our scheme with the EADA,Dual-Tree Based,and Range Query.Simulation results show that our scheme has better performances in terms of network lifetime,total energy consumption and overhead.