Abstract: In the application of wireless sensor networks for road surveillance and pipeline transmission，an algorithm based on 1 Dimension Received Signal Strength Ratio is presented. The algorithm is based on Received Signal Strength Indicator（RSSI） and linear location，and utilizes the ratios of signal strengths，instead of signal strength，to determine the locations of the unknown nodes. The algorithm only needs to establish the data set for ratio of the signal strengths once.Experiment results and comparisons with the RSSI algorithm show that the 1 Dimension Received Signal Strength Ratio（1-DIM-RSSR） can improve the location precision when the environments is changed，and the algorithm is well flexible and practical for linear applications.

Key words: wireless sensor networks, one dimension environment, location algorithm, received signal strength ratio

摘要： 针对无线传感器网络在道路监控、管道传输等一维环境中的应用，提出了基于接收信号强度比值的一维定位算法1-DIM-RSSR（1 Dimension Received Signal Strength Ratio）。该算法基于一维线性定位的思想，利用接收信号强度比值来确定未知节点的位置，只需要一次建立接收信号强度比值的数据库。实验结果表明，当环境改变时，与RSSI算法相比，1-DIM-RSSR算法定位精度高，在一维线性应用领域表现出了良好的灵活性和实用性。

关键词: 无线传感器网络, 一维环境, 定位算法, 接收信号强度比值