VGDRA: A virtual grid-based dynamic routes adjustment scheme for mobile sink-based wireless sensor networks
Exploiting the sink mobility in wireless sensor networks has been considered as a good strategy to balance the nodes energy dissipation. Despite its numerous advantages, the data dissemination to the mobile sink is a challenging task for the resource constrained sensor nodes due to the dynamic network topology caused by the sink mobility. For efficient data delivery, nodes need to reconstruct their routes toward the latest location of the mobile sink, which undermines the energy conservation goal. A virtual grid based dynamic routes adjustment (VGDRA) scheme is proposed that aims to minimize the routes reconstruction cost of the sensor nodes while maintaining nearly optimal routes to the latest location of the mobile sink. A set of communication rules is proposed that governs the routes reconstruction process thereby requiring only a limited number of nodes to readjust their data delivery routes toward the mobile sink.