Performance-Guided Reconfiguration of Wireless Sensor Networks that Use Binary Data for Target Localization

Abstract

Available resources limit the performance and lifetime of a wireless sensor network. In order to increase network lifetime in the face of depleting resources, networks that can be reconfigured to meet specified performance criteria are of interest. For a target localization scenario using binary sensor data, we present an approach in which network reconfiguration is guided using a performance criterion derived from the Cramer-Rao Lower Bound on the covariance of the errors in target location estimation. Inactive sensors are strategically placed within the sensor field to provide redundancy. When a sensor fails, sets of inactive sensors are identified as candidates for activation to replace it. The performance expected to be achieved by the activation of each candidate is determined, and decisions about which candidates to activate are made based on criteria of interest for the given application. Example scenarios are provided and some possible applications are discussed.

Simulation of Localized Performance-Guided Reconfiguration of Distributed Sensor Networks

“…A cost function that weighs additional criteria of interest is then used to select the candidate sensor sets that optimize performance as described in [3]. In this study, the PGR algorithm was applied locally within the cluster having the failed sensor.…”

“…Performance-guided reconfiguration (PGR) is an algorithm that can be employed to reconfigure a network to meet the desired performance goals when sensor failures occur [3]. When a sensor fails, PGR identifies candidates for replacing the failed sensor and uses a performancebased cost function to choose the candidates to be activated.…”

Improving Localization in Wireless Sensor Network Using Fixed and Mobile Guide Nodes

“…For example, in [3] destination measurement hardware is required and [4] needs angle measurement hardware. Method used in [5] needs a movable hardware and in [6,7] a send-range radio hardware is used. Generally, many localization schemes use fixed stations but in some others the position of sensor nodes is determined by mobile stations.…”