ISSN : 1796-2056
Volume : 4    Issue : 1    Date : February 2009

Effective Location Management of Mobile Actors in Wireless Sensor and Actor Networks
Nauman Aslam, William Phillips, and William Robertson
Page(s): 1-8
Full Text:
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Recent years have witnessed an increasing availability of heterogeneous sensor networks that
consist of a large number of resource constrained nodes (sensors) and a small number of
powerful resource rich nodes (actors). Such heterogeneous Wireless Sensor Actor Network
(WSANs) offer improvement of sensor networks' capacity/coverage, energy conservation and
network lifetime. This paper investigates the case where sensors are organized into clusters and
mobile actors are used for maintaining an energy efficient topology by periodically manipulating
their geographical position. We present an elegant technique that allows actor nodes to find an
optimal geographical location with respect to their associated cluster heads such that the overall
energy consumed is minimized. The proposed technique includes a weighted cost function based
on the residual energy levels of cluster heads that allows the mobile actor to optimally fine-tune its
geographical location. We present simulation results that demonstrate a significant increase of
network lifetime over the traditional cluster based WSN deployments.

Index Terms
wireless sensor actor networks, mobile actors, clustering, energy efficiency, network lifetime.