A voronoi diagram based efficient coordination mechanism for WSAN

In this paper, an efficient coordination mechanism is designed for Wireless Sensor and Actor Networks (WSANs) to perform reliable actions in the event area. It is a Voronoi diagram based energy and delay aware coordination mechanism using two-level hierarchical clustering protocol. In the first level, every actor calculates the sensor Voronoi region using sensor range and residual energy. In the second level, the sink calculates the actor Voronoi region consisting of sensors using its acting range. An optimal number of actors are calculated based on the network area and number of sensors. A routing protocol is provided to communicate among sensor´s and actor´s based on their characteristics. The performance of the proposed mechanism is evaluated in NS2 and compared with existing protocols. Simulation results indicate that the proposed mechanism outperforms the existing algorithms in various network parameters namely, energy, delay and packet delivery ratio.