4th International IEEE Conference on Broadband Communications, Networks, Systems

Research Article

Modeling and performance analysis of an improved DCF-based mechanism under noisy channel

  • @INPROCEEDINGS{10.1109/BROADNETS.2007.4550526,
        author={Adlen Ksentini and Marc Ibrahim},
        title={Modeling and performance analysis of an improved DCF-based mechanism under noisy channel},
        proceedings={4th International IEEE Conference on Broadband Communications, Networks, Systems},
        publisher={IEEE},
        proceedings_a={BROADNETS},
        year={2010},
        month={5},
        keywords={IEEE 802.11 RTS/CTS Contention Window noise.},
        doi={10.1109/BROADNETS.2007.4550526}
    }
    
  • Adlen Ksentini
    Marc Ibrahim
    Year: 2010
    Modeling and performance analysis of an improved DCF-based mechanism under noisy channel
    BROADNETS
    IEEE
    DOI: 10.1109/BROADNETS.2007.4550526
Adlen Ksentini1,*, Marc Ibrahim2,*
  • 1: IRISA, Université de Rennes 1, Campus universitaire de Beaulieu 35402 Rennes Cedex
  • 2: PRISM/CNRS, Université 45 Av des Etats-Unis 78035 Versailles, 45 Av des Etats-Unis 78035 Versailles – France
*Contact email: adlen.ksentini@irisa.fr, mib@prism.uvsq.fr

Abstract

The ISM free-licence band is highly used by wireless technologies such IEEE 802.11, Bluetooth as well as private wireless schemes. This huge utilisation increases dramatically the interferences (high Bit Error Rate) leading to lowering the reliability of such networks. Among these wireless-based technology, IEEE 802.11 suffers particularly from these high interferences since the wireless sender is confused by loss’ origins (noise or collision). In fact, the contention resolution mechanism (known as Backoff Exponential Binary) used by 802.11 assumes that each loss in the network is caused only by collision and hence acts to overcome this situation by delaying the retransmission of the packet lost. However, this mechanism is not efficient when the wireless channel is deployed in noisy environments, where collisions are mixed with high BER-caused errors. In this paper, we adapt the RTS/CTS handshake mechanism to the noisy channel through two possible mechanisms. After that, we model the proposed mechanisms by a two-dimension Markov model and validate these models by NS2 –based simulations.