Modeling and analysing an improved 802.11 MAC layer under noisy channel

Adlen Ksentini 1 Marc Ibrahim 2
1 ARMOR - Architectures and network models
IRISA - Institut de Recherche en Informatique et Systèmes Aléatoires, INRIA Rennes, Ecole Nationale Supérieure des Télécommunications de Bretagne
Abstract : The ISM free-licence band is highly used by wireless technologies such IEEE 802.11, Bluetooth as well as additional private wireless schemes. This huge utilization 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.
Type de document :
[Research Report] PI 1840, 2007, pp.17
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Contributeur : Anne Jaigu <>
Soumis le : vendredi 30 mars 2007 - 13:06:54
Dernière modification le : jeudi 11 janvier 2018 - 06:21:30
Document(s) archivé(s) le : mercredi 7 avril 2010 - 03:08:06


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  • HAL Id : inria-00139339, version 1



Adlen Ksentini, Marc Ibrahim. Modeling and analysing an improved 802.11 MAC layer under noisy channel. [Research Report] PI 1840, 2007, pp.17. 〈inria-00139339〉



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