Resource Allocation Scheme for Minimizing Power Consumption in OFDMA Systems

This paper proposes novel resource allocation schemes which minimize power consumption of Mobile Stations(MSs) in Orthogonal Frequency Division Multiple Access(OFDMA) systems. The conventional resource allocation schemes focus on maximizing throughput or mitigating inter cell interference. The proposed schemes allocate resource units assembled in an OFDM symbol to each MS for minimizing the total number of Orthogonal Frequency Division Multiplexing(OFDM) symbols that MSs receive. As a result, MSs can decode their own data with consuming less power for processing OFDM symbols. This paper introduces two schemes : Optimization Approached Scheme and Heuristic Approached Scheme. The simulation results in this paper show that the proposed schemes can contribute to reduce the power consumption of MSs and Heuristic Approached Scheme is more practical than Optimization Approached Scheme in view of computational time.