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http://dx.doi.org/10.1109/JCN.2014.000052

An Adaptive MAC Protocol for Wireless LANs  

Jamali, Amin (Electrical and Computer Engineering Department, Isfahan University of Technology)
Hemami, Seyed Mostafa Safavi (Department of Electrical Engineering, Amirkabir University of Technology)
Berenjkoub, Mehdi (Electrical and Computer Engineering Department, Isfahan University of Technology)
Saidi, Hossein (Electrical and Computer Engineering Department, Isfahan University of Technology)
Publication Information
Journal of Communications and Networks / v.16, no.3, 2014 , pp. 311-321 More about this Journal
Abstract
This paper focuses on contention-based medium access control (MAC) protocols used in wireless local area networks. We propose a novel MAC protocol called adaptive backoff tuning MAC (ABTMAC) based on IEEE 802.11 distributed coordination function (DCF). In our proposed MAC protocol, we utilize a fixed transmission attempt rate and each node dynamically adjusts its backoff window size considering the current network status. We determined the appropriate transmission attempt rate for both cases where the request-to-send/clear-to-send mechanism was and was not employed. Robustness against performance degradation caused by the difference between desired and actual values of the attempt rate parameter is considered when setting it. The performance of the protocol is evaluated analytically and through simulations. These results indicate that a wireless network utilizing ABTMAC performs better than one using IEEE 802.11 DCF.
Keywords
Medium access control (MAC); IEEE 802.11 DCF; wireless local area network (WLAN); throughput;
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