PEGASIS Protocol for Wireless Sensor Networks

Formulation of energy efficient protocols is of utmost importance for wireless sensor network(WSN) because of energy constraints of sensor nodes.PEGASIS(power-efficient gathering in sensor information system) is one of low energy algorithms for wireless sensor networks.The modified PEGASIS algorithm was proposed.The sensor area was divided into several areas of the same width.Then the proximate node from sink in every area was figured out to establish the main chain.The nodes on the main chain communicate to sink as the root node by turns.This method enhances network performances by reducing the transmission energy.Simulation results show that the improved algorithm has a higher efficiency of energy utilization.