Step-by-step approach for energy-efficient wireless sensor network

Energy minimization has become a key factor for efficient data transfer in wireless sensor network (WSN). IEEE 1451.5 standard explores the wireless communication schemes between multiple sensors and a data gathering node (DGN) emphasizing the multiple input single output (MISO) structure. In this paper, an energy-efficient cooperative technique which is done using distributed computing is proposed for a WSN. Selected numbers of sensors are used here to form a MISO structure wirelessly connected with a DGN. The selection of nodes is based on a step-by-step selection procedure where residual energy and channel gain parameter play the key role in selection. Data are sent by the sensors to a DGN using a multihop transmission. Energy models are evaluated for both correlated and uncorrelated scenarios while energy efficiencies are compared for different combination of cluster size and selected number of sensors. Delay difference is also derived.