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The recent research in localization technique has been supported by the emerging of wireless sensor network (WSN) technology. The issues of the estimated location accuracy have becoming the main research topics in WSN-based localization technique. In this paper, the application of WSN for localization technique using ZigBee standard is proposed. As IEEE 802.15.4 standard, ZigBee is widely used because of its advantages. It specially provides useful parameters for location estimation, i.e. received signal strength indicator (RSSI) and link quality indicator (LQI). In this paper, the simple but effective localization system is proposed. Range-based and location fingerprint-based are implemented. The different set of the reference nodes is applied. The effectiveness of this method is verified by data obtained from an indoor experiment in the 5m × 5m observed area. The error from estimated locations using both techniques is analyzed. The estimated location results from different amount of reference nodes are compared. The results show that the error from the observed area is less than 1.2 m for both localization techniques, respectively. The GUI is created to help the experiments in the visualization and for showing the estimated location. From this result, the simple but effective system is really beneficial for the real application.
Cherntanomwong et al. (Thu,) studied this question.