Reliability Modelling of Data Transmission Model with CSMA/CA in Wireless Environments  
Author Mitsutaka Kimura

 
Co-Author(s) Mitsuhiro Imaizumi; Toshio Nakagawa

 
Abstract In wireless communication networks, where multiple devices must share a common communication channel, it is essential to prevent data collisions that may occur when two or more devices attempt to transmit simultaneously. Such collisions can lead to transmission failures, retransmissions, and overall degradation of network performance. To address this issue, media access control (MAC) mechanisms have been developed, which regulate access to the communication channel. One common approach is to allow each device to monitor the status of the channel and determine whether it is idle before initiating transmission, thereby reducing the likelihood of collision. In this study, we examine a stochastic model of a wireless communication system that employs Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)―a widely adopted MAC protocol used in IEEE 802.11 wireless networks. In this model, each terminal senses the channel’s availability and, in order to avoid potential collisions, introduces a random backoff time before transmission. The decision to transmit is made probabilistically, based on the sensed state of the channel and predefined transmission rules. We analytically derive the mean time until packet transmissions succeed and discuss an optimal transmission strategy analytically.

 
Keywords Wireless Channel, Avoid Collisions, CSMA/CA, Window Flow Control, Reliability
   
    Article #:  RQD2025-53
 

Proceedings of 30th ISSAT International Conference on Reliability & Quality in Design
August 6-8, 2025