CSMA/CCA: A Modified CSMA/CA Protocol Mitigating the Fairness Problem for IEEE 802.11 DCF

Xin Wang; Georgios B. Giannakis

1st International ICST Conference on Multimedia Services Access Networks

Research Article

CSMA/CCA: A Modified CSMA/CA Protocol Mitigating the Fairness Problem for IEEE 802.11 DCF

Cite: BibTeX Plain Text

@INPROCEEDINGS{10.1109/MSAN.2005.1489949,
    author={Xin Wang  and Georgios B. Giannakis},
    title={CSMA/CCA: A Modified CSMA/CA Protocol Mitigating the Fairness Problem for IEEE 802.11 DCF},
    proceedings={1st International ICST Conference on Multimedia Services Access Networks},
    publisher={IEEE},
    proceedings_a={MSAN},
    year={2005},
    month={8},
    keywords={},
    doi={10.1109/MSAN.2005.1489949}
}

Xin Wang
Georgios B. Giannakis
Year: 2005
CSMA/CCA: A Modified CSMA/CA Protocol Mitigating the Fairness Problem for IEEE 802.11 DCF
MSAN
IEEE
DOI: 10.1109/MSAN.2005.1489949

Xin Wang ^1,2, Georgios B. Giannakis^1,2

1: Department of Electrical and Computer Engineering
2: University of Minnesota, Minneapolis, MN 55455; USA

Abstract

Using a distributed coordination function (DCF), the CSMA/CA protocol reduces collisions and improves the overall throughput in the IEEE802.11 WLAN. To mitigate fairness issues arising with CSMA/CA, we develop a modified version that we term CSMA/CCA (CSMA with copying collision avoidance). A station in CSMA/CCA contends for the shared wireless medium by employing a binary exponential backoff similar to CSMA/CA. Different from CSMA/CA, CSMA/CCA copies the contention window (CW) size piggybacked in the MAC header of an overheard data frame within its basic service set (BSS), and updates its backoff counter according to the new CW size. Simulations illustrate that CSMA/CCA improves fairness relative to CSMA/CA and offers considerable advantages for deployment in the 802.11 standard based WLANs.

Published: 2005-08-01
Publisher: IEEE

: http://dx.doi.org/10.1109/MSAN.2005.1489949