DocumentCode :
76541
Title :
QoS-Aware Energy-Efficient Radio Resource Scheduling in Multi-User OFDMA Systems
Author :
Xiao Xiao ; Xiaoming Tao ; Jianhua Lu
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Volume :
17
Issue :
1
fYear :
2013
fDate :
Jan-13
Firstpage :
75
Lastpage :
78
Abstract :
In this letter, the energy-efficient radio resource scheduling is studied with quality of service (QoS) guarantees in a multi-user OFDMA system. In contrast to existing works on QoS-aware scheduling, which mostly take sum throughput or total transmission power as optimization objectives, we formulate an optimization problem to maximize the energy efficiency subject to users´ QoS requirements. Based on Lagrangian duality then, an effective algorithm named QoS-aware energy-efficient resource scheduling is proposed to address the problem. Simulation results show that our proposed algorithm can effectively achieve the optimal solution and bring remarkable improvements on energy efficiency with QoS guarantees.
Keywords :
OFDM modulation; frequency division multiple access; optimisation; quality of service; scheduling; Lagrangian duality; QoS guarantee; QoS-aware energy-efficient radio resource scheduling; energy efficiency maximization; multiuser OFDMA systems; optimization problem; quality of service; sum throughput; transmission power; Complexity theory; Ellipsoids; Optimization; Quality of service; Resource management; Vectors; Wireless communication; Energy efficiency; OFDMA; QoS; scheduling;
fLanguage :
English
Journal_Title :
Communications Letters, IEEE
Publisher :
ieee
ISSN :
1089-7798
Type :
jour
DOI :
10.1109/LCOMM.2012.112012.121910
Filename :
6362129
Link To Document :
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