An Energy Efficient strategy for Grid-based Data Dissemination supporting Mobile Sinks in Wireless Sensor Networks

Wireless Sensor Networks are made up of small sensor nodes with sensing capability. These sensor nodes have limited power supply, computational capability and storage. Due to constrained energy source in wireless sensor nodes, the design and implementation of energy efficient protocols is one of the most important challenge in Wireless Sensor Networks. Mobility of sink in wireless sensor networks brings new challenges in the form sink location maintenance, continuous data delivery, avoiding/reducing detour problem but reduces the hotspot problem. In this paper, we propose an Energy-Efficient strategy for Grid-based Data Dissemination supporting Mobile sinks (EEGDD) in wireless sensor networks which is more energy efficient in data dissemination to the mobile sink. This strategy is based upon permanent virtual grid structure and disseminates data from source to sink using optimal path with minimum path delay. This strategy sends query/data announcements across the certain axis only for tracking the location of the sink and hence avoid huge amount of uncontrolled flooding used in other schemes. Analytical and simulation study reveals significant improvement in energy conservation in comparison to existing scheme. Keyword: Wireless Sensor Network, Sink Mobility, Data Dissemination, Energy Efficient.