Stability Analysis of Slotted Aloha Protocol for Cognitive Radio Users Using TUA

In this work, we use a new technique called tagged user approach (TUA) to analyze the performance of S-Aloha MAC protocol for CR users widely used in wireless communication. This new technique assumes that the channel is symmetric so that statistical equilibrium exists for all users. By adding two more realistic assumptions, we analyze the stability of the random chosen user and after extrapolate it to have the performances of the whole system for both finite and infinite buffer.