Trajectory of mobile sink node using GPSR in WSN to enhance energy efficiency

Abstract

Wireless Sensor Network cover a large geographical area and enable the acquisition of sensed data and
uploading to data sinks. Multi hop communication is required while nodes relay information between the source nodes
and the sinks. The lifetime of the Wireless sensor network largely depends on the energy of the sensor nodes neighboring
the sinks that relay all messages to sink and act as a last hop. One of the most critical problems in WSNs is achieving
energy efficiency in data collection. The drawbacks of using a static sink are well known. Mobile sink maybe used to
improve the energy efficiency compared to a static one. As the sink moves in the sensor field, it leads to high control
overhead for a sensor node to find a route to the sink and transfer packets to it. An energy efficient routing protocol for
event driven sensor networks is proposed to define the trajectory of the mobile sink node. The mobile sink uses GPSR
(Greedy Perimeter Stateless Routing Protocol) to define the path towards source node which enhances the network
lifetime.