Title :
A Novel QoS Scheduling Scheme in IEEE 802.16 Networks
Author :
Hou, Fen ; Ho, Pin-Han ; Shen, Xuemin Sherman ; Chen, An-Yi
Author_Institution :
Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont.
Abstract :
An increasing interest in IEEE 802.16 networks has been witnessed due to the demonstrated unique features in offering quality of service (QoS) satisfaction and service differentiation. Efficient scheduling plays a key role in fulfilling these operational requirements and unique characteristics. Traditional scheduling schemes such as opportunistic scheduling and proportional fairness scheduling focuses on throughput maximization and fairness instead of service differentiation and QoS guarantee. In this paper, a novel scheduling scheme is proposed to provide the QoS satisfaction and service differentiation in terms of delay. The proposed scheme manipulates a new design parameter - the time window of throughput evaluation, to differentiate the delay performance of each queue. By embedding wireless channel condition of each queue into the preference metric, opportunistic scheduling can be properly realized by trading the delay performance. An analytical model is developed on inter-service time, queue length, and waiting time, and is verified through extensive simulation.
Keywords :
IEEE standards; quality of service; queueing theory; wireless channels; IEEE 802.16 networks; QoS scheduling scheme; delay performance; embedding wireless channel condition; inter-service time; opportunistic scheduling; preference metric; proportional fairness scheduling; quality of service; queue length; service differentiation; throughput maximization; waiting time; Analytical models; DSL; Delay; Job shop scheduling; Portable media players; Processor scheduling; Quality of service; Queueing analysis; Throughput; Traffic control;
Conference_Titel :
Wireless Communications and Networking Conference, 2007.WCNC 2007. IEEE
Conference_Location :
Kowloon
Print_ISBN :
1-4244-0658-7
Electronic_ISBN :
1525-3511
DOI :
10.1109/WCNC.2007.458