Abstract: The CSMA/CA mechanism was formally modeled firstly. Based on the Markov Chain theory, the analysis of attack on CSMA/CA is introduced from two aspects, such as the stochastic performance model and bandwidth share model. After discussing the typical in frames. I}he attack performance attack methods, the experiments was performed with the knowledge of partial fields was analyzed by throughput, communication efficiency and collision numbers, which validated the feasibility and efficiency of attack method based on Markov Chain theory.

Key words: Markov chain, CSMA/CA, Access mechanism attack