A Low Delay Energy Equalizing Routing Scheme in Wireless Sensor Networks

In many applications of wireless sensor networks, the sensed data must be gathered and transmitted to a comparatively remote base station periodically. Here we propose a low delay energy equalizing routing scheme (LDEERS), which ensures long network lifetime and gathers data quickly. LDEERS introduces a dynamic route selecting scheme based on weight-value and height-value to form a tree and a mechanism similar to token passing to elect the root of the tree in each round. Underpinned by these schemes, LDEERS can simply and fast organize all the nodes with low overhead and is robust enough to the topology changes. Compared with HEED and GSEN, simulation results show that LDEERS achieves its goals of consuming less energy, equalizing the energy consumption of all the nodes, balancing the energy and delay metrics, as well as extending the network lifetime perfectly.