HM-LEACH: ENERGY EFFICIENT HETEROGENEOUS MOBILE LEACH PROTOCOL FOR HETEROGENEOUS WIRELESS SENSOR NETWORKS

Document Type : Original Article

Authors

1 Mathematics Department. Zagazig University, Zagazig, Egypt

2 Computer Science Department, . Sharjah University, Sharjah, UAE27272

3 Computer Science Department, Suez Canal University, Ismailia, Egypt

Abstract

in wireless sensor networks (wsns) sensor nodes with sensing, computing and communication
infrastructure are randomly deployed and organized as clusters. most of the existing sensor networks
focus on homogeneous in which the cluster heads are changed periodically. to improve the lifetime of
energy constraint battery powered wsn; clustered heterogeneous sensor networks are analyzed. in this
paper, we study the impact of heterogeneity of nodes in terms of their energy in mobile wsns that are
hierarchically clustered. we assume that a percentage of the population of sensor nodes is equipped
with the additional energy resources. we also assume that the sensor nodes are randomly distributed
and are mobile, the coordinates of the sink and the dimensions of the sensor field are known.
homogeneous clustering protocols assume that all the sensor nodes are equipped with the same amount
of energy and as a result, they cannot take the advantage of the presence of node heterogeneity.
adapting this approach, we introduce an energy efficient heterogeneous mobile leach protocol for
heterogeneous wsns based on weighted election probabilities of each node to become a cluster head
according to the residual energy in each node. Finally, the simulation results demonstrate that our
proposed heterogeneous clustering approach is more effective in prolonging the network lifetime and
reduce energy consumption compared with m-leach protocol.
International Journal of Intelligent Computing and Information Sciences
Volume 14, Issue 1
January 2014
Pages 51-61

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