面向环境监测的中心控制式WSN协议

摘要

Because the lifetime of Wireless Sensor Network(WSN) is restricted by the energy of nodes, this paper gives a WSN protocol for the environmental monitoring application, which uses a reservation system of temporary virtual circuit. In order to achieve the goal without conflicts, the data transmission is started and controlled by the control center which is characterized by the low consumption and high stabilization. By releasing awakening time schedules, the control center can adjust the duty ratio at any moment to decrease energy consumption of node. By using this protocol, node energy consumption is reduced while network lifespan is prolonged.%针对无线传感器网络寿命受节点能量制约的问题,提出一种面向环境监测应用的无线传感器网络协议.利用该协议建立临时虚电路预约机制,由控制中心启动和控制数据传输的操作,实现无冲突策略.控制中心通过下发唤醒时间安排随时调整占空比,由此节省网络能耗.实验结果表明,该协议能降低节点能耗,延长网络生命周期.