Cluster-grid structure routing protocol for sensor mobility management

Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a Hybrid-Structure Routing Protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection problem. A virtual cluster structure based on grid structure information is also built. The hybrid-structure can establish a local shortest routing path from mobile sink toward to source. Simulation results indicate that the proposed HSRP mechanism reduces about 28% energy consumption than other approach. Moreover, HSRP mechanism reduces average delay time, increases higher success ratio, and has a longer network lifetime.