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International Society of Science and Applied Technologies |
| Modeling a Data Transmission Scheme for CSMA/CA with Multiple Channel Sensing Attempts | ||||
| Author |
Mitsutaka Kimura
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| Co-Author(s) |
Mitsuhiro Imaizumi; Toshio Nakagawa
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| Abstract | Wireless communication networks have extensively
adopted the CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) protocol as a fundamental medium access control mechanism to mitigate packet collisions arising from simultaneous transmissions by multiple terminals. Under this scheme, each terminal senses the wireless channel and, if the channel is busy, defers its transmission by introducing a random backoff interval, thereby reducing the probability of frame collisions. While this randomized waiting mechanism is effective in improving transmission reliability, it inevitably introduces additional delay, which may degrade overall communication efficiency and system throughput. Consequently, a detailed analytical understanding of the trade-off between collision avoidance and delay performance is essential, and various stochastic models have been proposed to evaluate the impact of backoff mechanisms on network performance. This paper develops a stochastic communication model that incorporates the CSMA/CA protocol with an explicit limitation on the number of channel sensing attempts. In particular, we focus on the transmission process of a client and analyze the system behavior under constrained sensing conditions. We derive the mean time required for successful packet transmission, taking into account both the random backoff mechanism and the possibility of repeated sensing attempts, and analytically derive an optimal policy which maximizes throughput.
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| Keywords | Wireless Channel, Avoid Collisions, CSMA/CA, Window Flow Control, Reliability | |||
| Article #: RQD2026-65 | ||||
Proceedings of 31st ISSAT International Conference on Reliability & Quality in Design |