关键词: 无线传感器网络, 跳数, 水平修正, 垂直修正, 定位精度

Abstract:

An improved algorithm based on horizontal and vertical correction of hop counts is proposed to solve problem of traditional DV-Hop (Distance Vector-Hop) algorithm that the hop count information can not accurately reflect the distance relationship between two thus large errors in Wireless Sensor Networks (WSN).With hop horizontal correction between adjacent nodes,the hop count can be refined according to the radio of the distance between nodes and the node communication radius.And during this process,RSSI technique is adopted.On the basis of horizontal correction,correction angle is introduced during vertical correction of hop counts for node-adjacent nodes with the analysis of the possibility of inter-node distribution.The simulation results show that under the same network conditions,the proposed algorithm greatly improved the location accuracy effectively at the expense of a small amount of computation compared with DV-Hop algorithm.

Key words: wireless sensor networks;hop count;horizontal correction;vertical correction;location accuracy