Markov chain model for performance analysis of transmitter power control in contention based wireless MAC protocol

摘要

We have developed a three-state discrete-time Markov-chain model for the performance evaluation of contention-based medium access control (MAC) protocol. The proposed Markov-chain model is then used to analyze the carrier sense multiple access (CSMA) type MAC protocol for its delay and throughput characteristics with and without transmitter power control. Using simulations, the conditional capture probability (p{sub}(cap)), which gives a measure of the effectiveness of transmitter power control due to the capture effect, is quantified and experiments are performed to validate these simulated data for the p{sub}(cap). To analyze the effect of transmitter power variation, the Markov-chain model is modified by incorporating the p{sub}(cap). Numerical results show significant throughput as well as delay performance improvement using transmitter power control.