Keynote address: Building RF sensor networks

An RF sensor network is a sensor network, which measures the radio frequency (RF) channel at its sensor nodes, and infers properties of the network or the surrounding environment. General wireless sensor networks sense using other modalities - an RF sensor network uses its radio as a sensor. Applications include sensor localization, network management, secret key establishment, and device-free localization. This talk will explore RF sensor network applications, with an emphasis on received-signal strength (RSS)-based device-free localization, that is, locating moving people and objects based on measurements of RSS between pairs of nodes in the sensor network. We will describe 1) new multipath channel fading models which provide the basis for our ability to accurately estimate a person´s location; 2) algorithms for RSS-based device-free localization; and 3) lessons learned from prototype development and deployment.