Abstract
In this paper, we propose a 3-level heterogeneous network model for WSNs to enhance the network lifetime, which is characterized by a single parameter. Depending upon the value of the model parameter, it can describe 1-level, 2-level, and 3-level heterogeneity. Our heterogeneous network model also helps to select cluster heads and their respective cluster members by using weighted election probability and threshold function. We compute the network lifetime by implementing SEP protocol for our network model. The SEP implementation for the existing 1-level, 2-level, and 3-level heterogeneous network models are denoted as SEP-1, SEP-2, and SEP-3, respectively, and for our proposed 3-level heterogeneous network model, the SEP implementations are denoted as hetSEP-1, hetSEP-2, and hetSEP-3, respectively. In SEP-3 and hetSEP-3 the values of the network lifetime increase by 164.18% and 192.80%, respectively for increasing 100% in network energies as compared to the original implementation of SEP.
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