Analysis of Heterogeneity Characteristics for Heterogeneous WSNs

Heterogeneity aims to prolong the effective lifetime of WSNs. A network becomes energy heterogeneous when nodes with dissimilar initial energy are deployed. Energy heterogeneity of a WSN is represented by two heterogeneity characteristics- fraction of heterogeneous nodes and additional energy factor between nodes at different energy levels. This paper aims to analyze the impact of energy heterogeneity on WSNs to draw relationship between heterogeneity characteristics and stability period. Well known clustering techniques specially designed for heterogeneous WSNs like SEP, DEEC, DDEEC and HEC are evaluated and analyzed for different values of heterogeneity characteristic parameters. Results clearly indicate the need of having more number of advanced nodes with lesser additional energy as compared to lesser number of advanced nodes having higher additional energy for the network having same total energy. It will certainly bring attention of researchers towards importance of heterogeneity characteristics while designing clustering techniques for WSNs.

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