The Semi-physical Simulation Of The Spectrum Sensing Random Access Technology

At present, there are many kinds of networks. If one node only has one network access mechanism, it is unable to access in other networks while in their coverage. Random access method can solve this problem. The random-access node has the access mechanism of multiple networks, which can access in the right network properly according to the environment. The method can guarantee the quality of communication and enhance the convenience and flexibility of network access.Based on the study of semi-physical simulation and spectrum sensing, we design a mac method-random access technology. First of all, the random-access node using a variety of network access mechanism, can sense the spectrum using the spectrum sensing method, access in the network sensed, dynamically switch channels and networks to guarantee the quality of communication; Secondly, we implement the technology with semi-physical simulation technique, which enlarges the simulation scale, improves the simulation complexity, and provides a method to solve complex simulation problems; Finally, we analyze the results of OPNET simulation and verify the feasibility and performance of the method.