Contention free scheme for asymmetrical traffic load in IEEE 802.11x wireless LAN

Authors:
Soo Young Shin;Soo Hyun Park
Affiliations:
School of Business IT, Kookmin University, Seoul, Korea;School of Business IT, Kookmin University, Seoul, Korea
Venue:
AsiaSim'04 Proceedings of the Third Asian simulation conference on Systems Modeling and Simulation: theory and applications
Year:
2004

Citing 5
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Abstract

Every MAC (Medium Access Control) sub-layers of IEEE 802.11x, including IEEE 802.11e, defines Connection-based and CF (Contention Free)-based service functions in common. In this paper, a New-CF method is proposed. In the proposed method, conventional Round Robin method, which is used as a polling method by IEEE 802.11x PCF (Point Coordination Function) or IEEE 802.11e HCCA, is modified to give weights to channels with heavier traffic load and to provide those weighted channels with more services. Based on NS-2 simulations, it is verified the proposed method shows better throughput in general, particularly under asymmetrical traffic load conditions.