Title :
Feedback based dynamic scheduler for VBR multimedia services in IEEE 802.11e WLAN
Author :
Roy, J. Jackson Juliet ; Vaidehi, V. ; Srikanth, S.
Author_Institution :
AU-KBC Res. Centre, Anna Univ., Chennai
Abstract :
In this paper, a feedback based dynamic scheduler for hybrid coordination function (HCF) mode of WLAN (FDHCF) to support variable bit rate (VBR) multimedia services is proposed. The proposed scheduler dynamically estimates the transmission opportunity (TXOP) for VBR applications with a bounded delay constraint. This estimation is based on the maximum queue length estimate which is obtained from the queue size feedback information and from the traffic nature. An admission control algorithm is included to avoid the system overload to meet the guaranteed QoS. The performance of FDHCF scheduler is compared with standard HCF scheme and the simulation results show that the overall system performance is enhanced in terms of delay reduction and throughput enhancement
Keywords :
feedback; multimedia communication; quality of service; scheduling; telecommunication congestion control; telecommunication traffic; wireless LAN; IEEE 802.11e WLAN; VBR multimedia services; admission control algorithm; bounded delay constraint; delay reduction; feedback based dynamic scheduler; guaranteed QoS; hybrid coordination function mode; maximum queue length estimate; queue size feedback information; system overload; throughput enhancement; transmission opportunity; variable bit rate multimedia services; Admission control; Delay; Dynamic scheduling; Feedback; Quality of service; Resource management; System performance; Throughput; Traffic control; Wireless LAN; Admission Control; Hybrid Coordination Function; IEEE 802.11e; Quality of service; Scheduling;
Conference_Titel :
Wireless and Optical Communications Networks, 2006 IFIP International Conference on
Conference_Location :
Bangalore
Print_ISBN :
1-4244-0340-5
DOI :
10.1109/WOCN.2006.1666586
