Uncertain Data Clustering-Based Distance Estimation in Wireless Sensor Networks

Sensors

Qinghua Luo¹  Yu Peng²  Xiyuan Peng² 

[1] School of Information and Electrical Engineering, Harbin Institute of Technology at WeiHai, No.2 WenHua west road, Weihai 264209, China;Automatic Test and Control Institute, Harbin Institute of Technology, Harbin 150080, China; E-Mails:

关键词: wireless sensor network;    distance estimation;    RSSI;    uncertain data;    data clustering algorithm;   

DOI  :  10.3390/s140406584

来源: mdpi

【 摘 要 】

For communication distance estimations in Wireless Sensor Networks (WSNs), the RSSI (Received Signal Strength Indicator) value is usually assumed to have a linear relationship with the logarithm of the communication distance. However, this is not always true in reality because there are always uncertainties in RSSI readings due to obstacles, wireless interferences, etc. In this paper, we specifically propose a novel RSSI-based communication distance estimation method based on the idea of interval data clustering. We first use interval data, combined with statistical information of RSSI values, to interpret the distribution characteristics of RSSI. We then use interval data hard clustering and soft clustering to overcome different levels of RSSI uncertainties, respectively. We have used real RSSI measurements to evaluate our communication distance estimation method in three representative wireless environments. Extensive experimental results show that our communication distance estimation method can effectively achieve promising estimation accuracy with high efficiency when compared to other state-of-art approaches.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.