A Circle-Based Data Dissemination Algorithm for Wireless Sensor Networks with Mobile Sink

More and more researchers concentrate their attention on energy efficient usage and lifetime of Wireless Sensor Networks (WSNs). One of the complications impacting network lifetime is hotspot issue which can be solved by emerging Mobile Sink Wireless Sensor Networks (MSWSNs). In this paper, we propose circle-based data dissemination (CBDD) algorithm which supposes that sensor nodes are symmetrically deployed in a circle sensor field. It changes conventional data gathering method and relieves hotspot phenomenon. In CBDD, we assume the mobile sink is out of the sensor field and moves around the circle. When sink sends queries, the queried nodes communicate with sink via multi hops. Nodes on inner layers send data packets to nodes on outmost layer and sink gathers data from outmost nodes of the circular field. Simulation results validate CBDD algorithm outperforms conventional mechanisms with static sink in terms of reducing energy dissipation and prolonging network lifetime.