Non-Line-of-Sight Beacon Identification for Sensor Localization
Non-Line-of-Sight Beacon Identification for Sensor Localization
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DOI：
10.1155/2012/459590
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发表时间：
2012-08
影响因子：
2.3
通讯作者：
C. Wan;A. Mita;S. Xue
中科院分区：
文献类型：
--
作者：
C. Wan;A. Mita;S. Xue
近年来，传感器经常被用来感知目标环境。在大多数情况下，除了感知到的环境信息外，传感器本身的位置信息也是非常重要的。随着传感器数量的不断增加，传感器的自动定位成为必要。为了准确定位传感器，通常需要节点和信标之间的视线。然而，在许多情况下，很难确保每个信标都有到目标传感器节点的视线。提出了一种非视距信标识别方法。利用该方法可以找出与目标传感器视线不一致的信标，从而对最终的定位结果进行修正，提高定位精度。仿真结果表明，该方法能够有效地识别非视距信标。该方法将有助于传感器网络中真实的传感器定位，特别是对于信标分布稀疏的系统。
In recent years, sensors are often deployed to sense the target environment. Besides the sensed environmental information, sensor's position information itself is very important in most cases. With the increasing number of sensors, automatic sensor localization becomes necessary. For accurately localizing sensors, line of sight between nodes and beacons is often required. However, in many cases, it is very difficult to ensure that every beacon has the line of sight to a target sensor node. In this paper, a non-line-of-sight beacon identification approach is proposed. With which, the beacons that have no line of sight to a target sensor can be found out and then ruled out, thus the final localization result can be rectified and the accuracy can be improved. Simulations are conducted, and results show that non-line-of-sight beacons can be identified effectively. The proposed approach will be helpful in the real sensor localization in sensor networks, especially for the systems that beacons are sparsely deployed.