Flexible TXOP assignments for efficient QoS scheduling in IEEE 802.11e WLANs

Jeng Ji Huang, Che Yu Chang, Huei Wen Ferng

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

A basic concept in 802.11e is Transmission Opportunities (TXOPs). The draft amendment of IEEE 802.11e includes a Simple Scheduler, in which a fixed length of TXOPs is assigned according to mean data rates. Since some traffic present bursts of variable size, several enhancements have been proposed previously; e.g., TXOPs are allocated according to the actual buffered data which is indicated through transmissions performed in the previous TXOP. Though the allocations are efficient in channel utilization, a delay could inevitably be incurred by packets, due to that new arrivals cannot be transmitted in the current TXOP, but have to wait until next. In this paper, an efficient scheduling scheme is proposed that aims at improving packet delay while maintaining high channel utilization. In the proposed scheme, maximal residual bandwidth is assigned to a station taking into account demands from all the other stations, and the unused portion is reclaimed. From extensive simulation results, it is shown that packet delay is effectively improved, compared to two previous enhancements of the Simple Scheduler, while achieving high throughput performance.

Original languageEnglish
Title of host publication5th IEEE and IFIP International Conference on Wireless and Optical Communications Networks, WOCN 2008
DOIs
Publication statusPublished - 2008 Sep 10
Event5th IEEE and IFIP International Conference on Wireless and Optical Communications Networks, WOCN 2008 - Surabaya, Indonesia
Duration: 2008 May 52008 May 7

Publication series

Name5th IEEE and IFIP International Conference on Wireless and Optical Communications Networks, WOCN 2008

Other

Other5th IEEE and IFIP International Conference on Wireless and Optical Communications Networks, WOCN 2008
CountryIndonesia
CitySurabaya
Period08/5/508/5/7

    Fingerprint

Keywords

  • IEEE 802.11e
  • Scheduling
  • Wireless local area network (WLAN)

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Communication

Cite this

Huang, J. J., Chang, C. Y., & Ferng, H. W. (2008). Flexible TXOP assignments for efficient QoS scheduling in IEEE 802.11e WLANs. In 5th IEEE and IFIP International Conference on Wireless and Optical Communications Networks, WOCN 2008 [4542513] (5th IEEE and IFIP International Conference on Wireless and Optical Communications Networks, WOCN 2008). https://doi.org/10.1109/WOCN.2008.4542513