NDLI: Improving the aggregate throughput of access points in IEEE 802.11 wireless LANs

Content Provider	IEEE Xplore Digital Library
Author	Dong, X.J. Ergen, M. Varaiya, P. Puri, A.
Copyright Year	2003
Description	Author affiliation: Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA (Dong, X.J.; Ergen, M.; Varaiya, P.; Puri, A.)
Abstract	In IEEE 802.11 wireless LANs, the DCF access method and the PCF access method operate alternatively within a superframe to service the time-varying traffic demands. Due to different medium access mechanisms deployed by DCF and PCF, they work well for some particular types of traffic scenarios respectively, while their performance may degrade under some other types of traffic demands. None of them can keep high performance under all types of traffic demands. In this paper, we propose an adaptive control algorithm to keep the aggregate throughput of access points close to the best capacity of both DCF mode and PCF mode upon various traffic requests, by dynamically adjusting the duration of DCF mode and PCF mode within a superframe based on recent traffic scenarios in wireless LANs. We modified the MAC module of IEEE 802.11 wireless LANs in OPNET to support our algorithm. Extensive simulations have been done using OPNET. The simulation results show that high performance of access points is achieved during the dynamic traffic demands. The new control algorithm only requires simple extensions to the MAC layer of access points and is compatible with the MAC layer defined in IEEE 802.11 standard.
Sponsorship	IEEE Comput. Soc. IEEE Comput. Soc. Tech. Committee on Comput. Commun
Starting Page	682
Ending Page	690
File Size	456810
Page Count	9
File Format	PDF
ISBN	0769520375
ISSN	07421303
DOI	10.1109/LCN.2003.1243201
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-10-20
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Aggregates Throughput Wireless LAN Local area networks Air traffic control Degradation Traffic control Telecommunication traffic Communication system traffic control Costs
Content Type	Text
Resource Type	Article

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