Title :
Adaptive Proportional Fair Scheduling Based on Opportunistic Beamforming for MIMO Systems
Author :
Tan, Li ; Su, Gang ; Zhu, Guangxi ; Shang, Peng
Author_Institution :
Dept. of Electron. & Inf. Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
In MIMO systems, the multi-user diversity is exploited by always scheduling the subscribers whose channel conditions are almost in their peaks. The throughput of system is increased but the fairness is ignored, even some subscribers will be "starvation". In this paper, the fairness of the MIMO systems is concerned and two adaptive proportional fair scheduling schemes based on opportunistic beamforming are proposed to increase the throughput of the subscribers in the bad channel conditions and guarantee the fairness allover the systems. In each timeslot, the adaptive parameters are updated by monitoring the requested data rate and the mean of the requested data rate in the past period. And the adaptive parameters are updated per-user basis. The proposed schemes find a tradeoff between the throughput and the fairness. And the simulation results show the validity.
Keywords :
MIMO communication; array signal processing; MIMO systems; adaptive proportional fair scheduling; adaptive proportional fair scheduling schemes; opportunistic beamforming; Adaptive scheduling; Array signal processing; Channel state information; Condition monitoring; Downlink; Fading; Fluctuations; MIMO; Quality of service; Throughput;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3692-7
Electronic_ISBN :
978-1-4244-3693-4
DOI :
10.1109/WICOM.2009.5304973