An Improved Cluster-head Selection approach in wireless sensor networks

Abstract

As one of the most dominant factors in clustered wireless sensor networks (WSNs), the selection of cluster-head (CH) can impact the network performance. The selection shall be subject to at least two factors. (i) The number of CHs may vary in different periods of the WSN lifetime. And (ii) this number can determine on the performance, in terms of energy consumption and WSN lifetime, etc. In this paper, we draw attention to the randomly deployed WSNs based on the independent homogeneous Poisson process, and propose an Improved Cluster-head Selection (ICS) approach. Firstly, we optimize the dynamic number of CHs. Then we obtain the suitable CHs via the improved selection procedures based on three selection phases by introducing the temporary clusters. Meanwhile, CECCbased (Common Energy Consumption Cycle) synchronization is used to coordinate the intra-/inter-cluster communication. ICS saves the energy consumption and prolongs the network lifetime.Simulation demonstrates the enhanced network performance.

A Survey on the Taxonomy of Cluster-Based Routing Protocols for Homogeneous Wireless Sensor Networks

“…In the proposed scheme, if the number of selected CHs in the initial stage is below some predefined threshold, an add-on stage is called until number of selected CHs exceeds the threshold value. In [ 49 ], a semi-centralized scheme is proposed in which the selection of CHs is distributed and self-organized, while the BS controls the number of selected CHs and stops the CH selection phase as the number of selected CHs reaches the predefined optimal value.…”

Interaction of clustering period and event sensing reliability in IEEE 802.15.4 based WSNs

“…In [8] the authors proposed LEACH-Centralized (LEACH-C) to improve placement and number of CHs in LEACH algorithm. The authors in [6] proposed a hybrid method in such a way that the selection of CHs is distributed while controlling the number of CHs is centralized.…”