Physical Rate Based Admission Control for HCCA in IEEE 802.11e WLANs

Authors:
Deyun Gao;Jianfei Cai;Liren Zhang
Affiliations:
Nanyang Technological University;Nanyang Technological University;Nanyang Technological University
Venue:
AINA '05 Proceedings of the 19th International Conference on Advanced Information Networking and Applications - Volume 1
Year:
2005

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Abstract

The IEEE 802.11 working group is currently working on the support of quality of service (QoS) in a new standard called IEEE 802.11e which introduces the so-called hybrid coordination function (HCF). A simple admission control unit has already been developed as a reference for HCF controlled channel access (HCCA) in a recent TGe draft [3]. However, this reference scheme is inefficient because it is implemented based on the minimum physical rate from which the mobile stationsý actual physical rates deviate greatly at most of the time. In this paper, we propose a physical rate based admission control scheme (PRBAC) which enhances the reference scheme by taking account of both the wireless channel characteristics and the stationsý mobility. Numerical analysis and simulation results show the significant improvement of the proposed admission control scheme.