无线传感器网络中的功率控制定位

Wen-Hwa Liao, Yu-Chee Lee
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引用次数: 6

摘要

定位是无线传感器网络中的一个重要问题,因为传感器节点随机分布在一个区域内,它们自己连接到网络中。在无线传感器网络中,传输功率水平的调整对网络的能量效率和网络寿命有重要影响。在这项工作中,我们提出了一种在无线传感器网络中具有功率控制的定位方案。每个节点可以发送不同功率级别的信标报文。当节点接收到不同功率级别传输的信标包时,自适应选择信标包来估计到地标的距离。当一个传感器节点估计到三个地标的距离时,它可以通过三角测量计算其位置。仿真结果表明,该方法能有效地提高定位的误差率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Localization with Power Control in Wireless Sensor Networks
Localization is an important topic in wireless sensor networks because sensor nodes are randomly scattered over a region and they get connected into network on their own. Adjusting transmission power levels has an important impact on energy efficiency and network lifetime in wireless sensor networks. In this work, we proposed a localization scheme with power control in a wireless sensor network. Each node can transmit beacon packet in different power levels. Whenever a node receives beacon packets transferred in different power levels, it will adaptively select beacon packet to estimate distance to the landmark. When a sensor node has estimated the distances to three landmarks, it can compute its location by triangulation. Simulation results show that the proposed scheme can improve the error rate of localization.
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