Coverage lifetime improvement through efficient deployment of sensor nodes in WSN

One of the major issues in WSN is coverage lifetime due to the constraint of Battery power. Prolonging the network lifetime while covering the sufficient area is an important issue in WSN research. In a dense WSN the excessive use of sensors causes some problems such as congestion. Some researchers have applied the notion of extra nodes for connectivity purpose and develop the methodology that broadcast the status(on/off) information of sensor nodes to their one hop neighbors, but these approaches are able to increase the messaging and density of the WSN. In this paper we are providing an analytical method for increasing the lifetime of the WSN by maintaining the disjoint groups of sensors. An individual group can provide the whole area coverage at a time. So we can make only one group active at a time in WSN. The tessellation form after placing a group of sensor is regular rectangle. The analytical and simulation results show that we can increase the coverage lifetime by more than two times of the original lifetime.

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