NDLI: A smart exponential-threshold-linear backoff algorithm to enhance the performance of IEEE 802.11 DCF

Content Provider	IEEE Xplore Digital Library
Author	Chih-Heng Ke Chih-Cheng Wei Tin-Yu Wu Der-Jiunn Deng
Copyright Year	2009
Description	Author affiliation: Department of Computer Science andI nformation Engineering, National Kinmen Institute of Technology (Chih-Heng Ke; Chih-Cheng Wei) \|\| Department of Electrical Engineering, Tamkang University (Tin-Yu Wu) \|\| Department of Computer Science and Information Engineering, National Changhua University of Education (Der-Jiunn Deng)
Abstract	Based on the standardized IEEE 802.11 Distributed Coordination Function (DCF) protocol, this paper proposes a new backoff algorithm, called Smart Exponential-Threshold-Linear (SETL) Backoff Algorithm to enhance the system performance of contention-based wireless networks. As we know, the smaller contention window (CW) will increase the collision probability, but the larger CW will delay the transmission. Hence, in the SETL scheme, a threshold is set to determine the network load. When the CW is smaller than the threshold, a light network load, the CW size is self-adjusted exponentially. Conversely, if the CW is larger than the threshold, a heavy network load, the CW size is tuned linearly. In addition, the SETL takes a more conservative measure by decrease the CW after “S” times consecutive successful transmission to reduce the collision probability, especially when the competing station is large. By simulation, the numerical results show that the SETL provides a better system throughput and collision rate in both light and heavy network load than the related backoff algorithm schemes, including binary exponential backoff (BEB), exponential increase exponential decrease (EIED) and linear increase linear decrease (LILD). The SETL is very easy to implement, as it dose not require any changes in DCF procedures. Every station will self-adjust CW well with high performance and low collision rate.
Starting Page	1
Ending Page	5
File Size	248501
Page Count	5
File Format	PDF
ISBN	9781424443376
DOI	10.1109/CHINACOM.2009.5339950
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-08-26
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	EIED Wireless application protocol 802.11 DCF Access protocols Educational technology Physical layer Multiaccess communication Computer science LILD backoff algorithm Media Access Protocol Computer science education Systems engineering education Personal digital assistants BEB contention window
Content Type	Text
Resource Type	Article

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