Title :
Energy-Efficient Resource Allocation in Uplink OFDMA Systems under QoS Constraints
Author :
Haina Ye ; Gubong Lim ; Cimini, Leonard J. ; Zhenhui Tan
Author_Institution :
Sch. of Electron. & Inf. Eng., Beijing Jiaotong Univ., Beijing, China
Abstract :
Uplink energy-efficient communication is an important issue due to the limited battery capacity of user equipments (UEs). In this paper, we study the energy-efficient resource allocation for uplink OFDMA systems. We propose efficient suboptimal resource allocation algorithms to maximize system energy efficiency (EE) under individual UEs´ transmit power and quality of service (QoS) constraints. The proposed algorithms consist of two iterative resource allocation stages: the rate achievement stage and the EE maximization stage. In the rate achievement stage, resources are assigned to meet the users´ QoS constraints and, in the EE maximization stage, the overall system EE is maximized using residual resources. Simulation results show that the proposed algorithms increase the system EE as well as the system throughput, compared with existing algorithms.
Keywords :
OFDM modulation; frequency division multiple access; iterative methods; quality of service; resource allocation; EE maximization stage; QoS constraints; UE transmit power; battery capacity; energy-efficient resource allocation; iterative resource allocation stages; quality of service; rate achievement stage; residual resources; suboptimal resource allocation algorithms; system energy efficiency maximization; uplink OFDMA systems; uplink energy-efficient communication; user equipments; Educational institutions; Magnetic resonance imaging; Quality of service; Resource management; Simulation; Uplink; Wireless communication;
Conference_Titel :
Military Communications Conference, MILCOM 2013 - 2013 IEEE
Conference_Location :
San Diego, CA
DOI :
10.1109/MILCOM.2013.79