Vol 7, No 1 (2016) > Electrical, Electronics and Computer Engineering >

Improved Leach Algorithm for Energy Efficient Clustering of Wireless Sensor Network (WSN)

Vergin Raja Sarobin M., Linda Ann Thomas

 

Abstract:

The demand for a Wireless
Sensor Network (WSN) has
increased enormously because of its great ability to supervise the outside
world as well as due to its vast range of applications. Since these sensor
nodes depend greatly on battery power and being deployed in adverse environments, substituting the
battery is a tiresome job. Cluster-based routing techniques are prominent methods to
extend the lifetime of wireless sensor networks. In this research, the work on energy
efficient clustering approach is considered in two phases. During the cluster head selection phase, cluster
heads are chosen which can stabilize the power consumption in sensor networks, by
considering both the residual energy and distance of node with respect to sink.
Later, during the cluster formation phase, a non-cluster head node will choose a cluster head
that lies in close proximity with the center point between the sensor nodes and
sink. Also, these non-cluster head nodes should be within the transmission
range of the cluster head, as selected by the above method. Initially, the Low Energy Adaptive
Clustering
Hierarchy
(LEACH) which is an eminent protocol for sensor networks is investigated.
Furthermore, the
same LEACH protocol is enhanced by proposing an effective cluster head election
scheme as well as a new cluster formation scheme as mentioned above. Simulation
results reveal that the proposed algorithm outperforms the traditional LEACH protocol in
prolonging network lifetime.

Keywords: Cluster head election; LEACH protocol; Network lifetime; New cluster formation

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