Clustering Structure Based Time Switching Power Control optimization for Energy Harvesting Ad-Hoc Networks

Abstract

Energy harvesting technology provides neoteric possibilities for prolonging the service life of mobile nodes in Ad-Hoc networks. In this paper, we focus on using energy harvesting technology in clustering structure based Ad-Hoc networks to decrease the system total power consumption as well as prolong the lifetime of the cluster. Distinct from the way in which a base station transmits energy to multiple mobile nodes in a general wireless network, we propose a scheme that the process of energy harvesting occurs at the cluster head which is able to receive information and harvest energy from dedicated subcarriers sent by the cluster members so as to alleviate burdens on its battery. We split the communication slot into two parts, energy transmission and information transmission, and formulate an optimization problem to obtain its optimal time switching ratio which will determine the power of each subcarrier and affect the energy consumption performance of the networks. Simulation results show that our proposed scheme can substantially reduce system power consumption and prolong the cluster’s lifetime under different channel conditions, numerical analysis also proves that it is feasible to expand the capacity of cluster with less cost.