Title :
Movement Assisted Sensor Deployment in Directional Sensor Networks
Author :
Liang, Chiu-Kuo ; He, Meng-Chia ; Tsai, Chih-Hung
Author_Institution :
Dept. of Comput. Sci. & Inf. Eng., Chung Hua Univ., Hsinchu, Taiwan
Abstract :
A directional sensor network is composed of many directional sensor nodes. Unlike conventional omni-directional sensors that always have an omni-angle of sensing range, directional sensors may have a limited angle of sensing range due to technical constraints or cost considerations. Area coverage is still an essential issue in a directional sensor network. In this paper, we study the area coverage problem in directional sensor networks with mobile sensors, which can move to the correct places to get high coverage. We present distributed self-deployment schemes of mobile sensors. After sensors are randomly deployed, each sensor calculates its next new location to move in order to obtain a better coverage than previous one. The locations of sensors are adjusted round by round so that the coverage is gradually improved. Based on circumcenter and incenter of sensing direction of the directional sensors, we design two schemes, namely Circumcenter-based and Incenter-based schemes respectively, to guide the moving direction. Simulation results show the effectiveness of our schemes in term of the coverage improvement.
Keywords :
sensor placement; wireless sensor networks; area coverage; assisted sensor deployment; circumcenter sensing direction; directional sensor networks; incenter sensing direction; mobile sensor; moving direction; Ad hoc networks; Mobile communication; Mobile computing; Robot sensing systems; Simulation; Wireless sensor networks; area coverage; directional sensors; mobile sensors;
Conference_Titel :
Mobile Ad-hoc and Sensor Networks (MSN), 2010 Sixth International Conference on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4244-9456-9
Electronic_ISBN :
978-0-7695-4315-4
DOI :
10.1109/MSN.2010.42