Effect of multiple sink on the lifetime of multiple chain PEGASIS

Abstract

A wireless sensor network (WSN) is a wireless network consisting of spatially distributed autonomous devices using sensors to monitor physical or environmental conditions. Gathering sensed information in an energy efficient manner is critical to operate the sensor network for a long period of time. In a data collection problem is defined where, in a round of communication, each sensor node has a packet to be sent to the distant base station. If each node transmits its sensed data directly to the base station then it will deplete its power quickly. The lifetime of the network depend how much energy spent in each transmission. PEGASIS is a Chain Based hierarchial routing protocol. The PEGASIS (Power-Efficient Gathering in Sensor Information Systems) protocol forms a chain of the sensor nodes and the chain is formed using a greedy approach, starting from the node farthest to the sink node. The nearest node is send the data to the neighbour node and takes turns transmitting to the base station, thus reducing the amount of energy spent per round. In wireless sensor network, sensor nodes have limited power and processing capability. The multichain concept in PEGASIS and sink mobility increases the network lifetime in wireless sensor network. In this project, we are showing a revised multi-chain PEGASIS protocol by using the multiple sinks to maximize the network lifetime. The simulation is done in MATLAB. We have considered different different areas and different no. of nodes for simulation and Multiple sinks and multiple nodes are placed using pegasis protocol.