IOT (Internet of Things, IoT) is predicted to continue another wave of science and technology and the global economy after the Internet information industry, by governments, businesses and academic attention, the United States, European Union, Japan, and even integrating them into national and regional information Strategy. As the Internet continues to rich business types, expand complex, from single to fusion, from a variety of access methods to the core network of the whole transition fusion. By applying the theory of double clocks control to the CSMA protocols, setting the probability of sending packet and the probability of sensing channel to improve system performance. Through modeling analysis, the proposed three-dimensional probability CSMA based on double clocks mechanism decrease the system idle time, making the channel resource highly use.
