The hitting times analysis of cognitive user in Cognitive Internet under random direction mobility model

The Cognitive Internet as a new Internet architecture with cognition capability was proposed based on the cognitive radio technology and new network architecture. Cognitive Internet has two kinds of users called Cognitive Users (CUs) and Primary Users (PUs). The CUs can occupy the frequency of PUs when they are absent. As a result, the activities of CUs may have an important impact on the PUs. So in this paper, we model the movement behavior of CU under the random direction mobility model, and analyze its expected hitting time between CU and PU to evaluate its potential impact. Besides, we simulate the mobility of CU to acquire the expected hitting times, and compare it with the analytical results. The final results show that the analytical results can fit with the simulation results.