IEEE 802.11 wireless protocol: user performance using discrete-time Markov chains

We present discrete-time Markov chain models for users under p-persistent CSMA-CA, and IEEE 802.11g protocols. Numerical simulations of the protocols are presented and indicate that the IEEE 802.11 g has superior performance compared to CSMA-CA systems. The reason for that is the use of reservation slots which reduces the chance of collisions compared.