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The Journal of The Korea Institute of Intelligent Transport Systems Vol.8 No.1 pp.102-109
제한적 CSMA를 이용한 Hybrid TDMA/CSMA MAC의 성능 향상
A Study on Performance Improvement of Hybrid TDMA/CSMA MAC Using the Limitive CSMA
Abstract
This paper proposes the efficient method of CSMA during an idle duration in the time slot. The hybrid TDMA/CSMA protocol is the method that shares the medium efficiently. This improves the channel efficiency and throughput by using CSMA method during the idle TDMA time slot. In CSMA duration, many devices start to compete with each other. This causes a low throughput because of a long delay and a frequent collision. In order to improve this problem, the proposed method reduces the number of devices that compete in the CSMA duration. Because the number of competed device is reduced, this proposed algorithm reduces the delay and collision probability. This decrements of delay and collision probability improve the networks. The simulation results show that the proposed limitive CSMA methods outperform any methods of hybrid TDMA/CSMA protocol.
