Abstract: Vehicular ad-hoc network is used for auto driven system. In this system road side units available on the roads communicate with different nodes available on the roads. RSU transmit the safety message to the vehicle using allocated bandwidth. In this paper safety message has been transmitted in the high speed and high load traffic area using cognitive radio channels. Due to traffic message drop ratio increase because of congestion so by using channel sensing and GPSR predicts the nodes location and movement. Radio channel has higher band width as compare to the normal 2.54 GHz band. By using channel sensing safety message can be transmitted to the vehicle without any delay and collision can be avoided. Various parameters represents that purposed approach much better than previous approaches.
Keywords: VANET, CRCN, Spectrum sensing, CCH.