Balancing Energy Consumption to Maximize Network Lifetime in Data-Gathering Sensor Networks

Energy imbalance is a serious problem in wireless sensor network. This paper describes the various reasons for energy imbalance in wsn and different techniques to ensure energy efficient data transmission. It is characterized by multihop routing and difference in the responsibilities of different nodes. So because of different responsibilities, node dissipates their energy unevenly and result into energy holes. These energy holes result into network disconnectivity.So far so many different techniques has been proposed and some of them are exceptionally better than other, but on cost of some parameters and compromising with other parameters.