GBDD: Grid Based Data Dissemination in Wireless Sensor Networks

Various data dissemination methods have been proposed over the years to reduce energy consumption in wireless sensor networks. One thing common and pivotal to every dissemination approach´s performance is the network topology used underneath. Moving sink and moving event pose major challenge while developing data dissemination schemes for wireless sensor networks. In this paper, we propose a dual radio based grid construction scheme which exploits dual radio mode of a sensor node to form a grid across sensor field. Grid construction is initiated by the sink appearing in the sensor field when no valid grid is present. Any sink appearing during valid grid period shares existing grid and thus obviate the need to construct new grid. Both short and long radio transmission ranges of a dual radio decides the cell size and all nodes with in a cell form a cluster with one of nodes at corners of the cell acting as cluster head. Based upon this grid, we develop novel methods for handling multiplicity and movements of sinks and events in sensor field so as to ensure continuous data delivery from source nodes to sink or sinks. We conducted simulation experiments to evaluate GBDD in different scenarios and compared it with Two-Tier Data Dissemination (TTDD) approach. Results clearly show significant improvements in performance in most of scenarios as compared to TTDD.