无线传感器网络中的移动式目标跟踪

Mobility-Assisted Target Tracking in Wireless Sensor Networks

针对传统无线传感器网络进行移动目标跟踪时能耗过高的问题,提出一种基于移动节点和固定节点协同工作的移动式目标跟踪算法.在传统的由固定节点组成的无线传感器网络中加入少量移动节点,对移动目标进行持续性跟踪.通过移动节点和普通固定节点之间的配合,提高监测质量和容错性,在满足既定监测质量要求的前提下,尽可能地减少参与监测的普通固定活跃节点的数量.仿真实验结果表明:所提出的跟踪方法可以有效地降低固定节点的能耗,延长网络生存期.

In order to solving the high energy consumption problem for traditional wireless sensor networks to track mobile targets,this paper proposes a novel mobility-assisted target tracking algorithm,in which mobile sensors and fixed sensors can work collaboratively at the same time.A few of mobile sensor nodes are introduced into traditional sensor networks,which consist of fixed sensor nodes,for continuously tracking the targets.Through the cooperation between mobile sensors and fixed sensors,the detection quality and fault tolerance can be improved.When the established threshold of detection quality is guaranteed,the number of active fixed sensor nodes joined in tracking is limited as much as possible.Simulation results show that the proposed method can effectively reduce the energy consumption of fixed sensors and so prolong the lifetime of the networks.