A Novel Sensing Coordination Framework for CR-VANETs

This paper introduces a novel framework of coordinated spectrum sensing in cognitive-radio-enhanced vehicular ad hoc networks (CR-VANETs). The proposed sensing coordination framework intends to initiate a graceful compromise between stand-alone and cooperative sensing by taking the best of the two while mitigating their respective disadvantages. With a sensing coordination node temporarily defined, the fine sensing activities of all the surrounding secondary users are coordinated and scheduled such that better sensing precision and efficiency can be achieved. We will demonstrate the feasibility and appropriateness of the proposed CR sensing framework in CR-VANETs and verify its performance through extensive simulations in terms of the success rate of spectrum sensing, sensing overhead, probability of sensing conflict, and temporal usage rate.