Title :
A Localization Algorithm for WSN Based on Characteristics of Power Attenuation
Author :
Yu Feng ; Wang Qin ; Zhang Xiao-Tong ; Li Chong
Author_Institution :
Sch. of Inf. Eng., Univ. of Sci. & Technol. Beijing, Beijing
Abstract :
A novel localization algorithm for wireless sensor networks (WSN) is presented. It establishes an interval mapping between the received signal strength (RSS) and the distance on the basis of the log-normal shadowing model and the "3 sigma " principle of normal distribution. With this interval mapping, the radio range is divided into several intervals and an unknown node is able to know which intervals it is located in. Transforming all the interval information into geometric constraints, this algorithm determines a closed area called "the target annulus-segment region". It is the minimum area covering the unknown node, and its center position is expected to be the estimate location of the unknown node. As compared to other RF-based localization algorithms such as centroid, bounding-box, APIT and MLE, our algorithm performs better when the side length of location space is approximate to or shorter than the radio range of sensor nodes.
Keywords :
geometry; normal distribution; wireless sensor networks; 3 sigma principle; geometric constraints; interval mapping; localization algorithm; log-normal shadowing model; normal distribution; power attenuation; radio range; received signal strength; target annulus-segment region; wireless sensor networks; Attenuation; Costs; Fading; Gaussian distribution; Maximum likelihood estimation; Power engineering and energy; Radio frequency; Shadow mapping; Signal mapping; Wireless sensor networks;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-2107-7
Electronic_ISBN :
978-1-4244-2108-4
DOI :
10.1109/WiCom.2008.819
