Ham-leach : energy efficient heterogeneous mobile leach protocol for heterogeneous wireless sensor networks

Abstract EN

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.