Many parameters of wireless communications are uniquely configured, regardless of their communication environments. However, we believe that stations are able to achieve efficiency in communications using surrounding information. One of the systems that is expected to improve the performance of wireless communications is Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) in the MAC Layer. In this paper, we propose a new model to improve network performance using information about the number of stations in the backoff algorithm of CSMA/CA. Although there are already some proposals for the use of the backoff algorithm, most of them are proposed under an ideal scenario, in which the communication conditions of all the stations are the same. However, we propose a model that can adapt to scenarios in which the communication conditions of each station are different. The performance of CSMA/CA enhanced with our algorithm is extensively investigated in simulations performed under multiple scenarios. The obtained results indicate that our model can simultaneously achieve good communication performance and fairness.
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