Localization Method for Low-power Wireless Sensor Networks

Context awareness is an important issue in ambientintelligence to anticipate the desire of the user and,in consequence, to adapt the system. In context awareness,localization is very important to enable a responsive environmentfor the users.Focusing on this issue, this paper presents a localizationsystem based on the use of Wireless Sensor Networksdevices. In contrast to a traditional RFID, these devices offerthe possibility of a collaborative sensing and processing ofenvironmental information.The proposed system is a range-free localization algorithmthat uses fuzzy inference to process the RSSI measurementand to estimate the position of mobile devices. The maingoal of the algorithm is to reduce the power consumptionand the cost of the devices, especially for the mobiles ones,maintaining the accuracy of the inferred position.