Through setting the probability of sending packet and the probability of sensing channel, this paper apply the theory of double clocks control to the CSMA protocols, decreasing the system idle time, making the channel resource highly use and improving the system performance. By introduction of the three-way handshake mechanism increases the reliability and stability of the system, reducing the collision possibility of the information packets to a certain extent, solves the problem of the hidden terminal and exposed terminal, improves the channel utilization. By the modeling analysis and computer simulation-MATLAB, the analytical results and simulation results show that the theoretical analysis are consistent with the simulation experiments.
