无线传感器网络中传感器节点的布置

在无线传感器网络中，传感器节点收集本地数据，通常通过其它节点将数据转发给基站，因而离基站越近的节点，消耗的能量越多．如果采用通常的方法，即均匀布置传感器节点，则基站附近的节点将很快消耗完能量，基站也就无法收集数据．本文通过研究无线传感器网络中的能量消耗，得到了一个布置传感器节点的密度函数，按此函数布置传感器节点可以有效地延长系统的生命期．理论分析和模拟结果表明，本文的布置方案将系统生命期提高到均匀布置方案的3R/2t倍，这里t为传感器节点的通信距离，R为传感器节点的分布区域半径．

Deploying Sensor Nodes in Wireless Sensor Networks

In sensor networks,sensor nodes collect local data and transfer these data to the base station often relayed by other nodes.Therefore sensor nodes that are nearer to the base station will consume more energy. If deploying sensor nodes in general way, i.e. deploying nodes uniformly in the network, sensor nodes nearby the base station will use up energy soon and the base station can't collect data anymore. This paper presents a density function to deploy sensor nodes through investigating energy consumption in wireless sensor network. Theoretical analysis and simulation result show that deploying by method of this paper improve system lifetime to times of deploying uniformly, where t is radio distance of sensor node and R is radius of the region of deploying sensor nodes.