Reduction of Localization Error in Mobile Sensor Networks

Abstract- Se nsor localization has be come an esse ntial re quire me nt for re alis tic applications ove r Wire less Se ns or Ne tworks (WSNs). As s uch localization s che me des igne d for mobile se nsor ne tworks is ne cessary. He re the obje ctive is to des ign a localization s che me to improve the localizat ion accuracy by us ing localization sche me Improve d Monte-Carlo Localization (IMCL). In this me thod, all se ns or nodes are mobile, normal node colle cts the locations of its one-hop and t wo-hop anchor nodes via mess age exchange, and cons tructs a ne w poss ible location se t in e ach time s lot whe re the normal node may locate. The normal nodes without location info rmation can es timate the ir own locations by gathe ring the pos itions of location-aware nodes (anchor nodes) and the one- hop normal nodes whose locations are estimate d from t he anchor nodes. In e ach time s lot e ach normal node executes these three phases once and ge ts its estimate d location. Our s imulation res ult s hows that the localization e rror us ing this s che me is lowe r than t he pre vious s che mes s uch as MCL, MSL and bounde d box sche mes unde r various mobilit y mode ls and moving s pee ds