To the question of using the cognitive technology of «white spots» of the TV range in VANET networks

The article discusses problems transmission of the messages of road safety in the VANET network in the broadcast mode via radio channels between two moving cars. The problem caused by the low location of the transmitting and receiving antennas above the earth’s surface. The waves used in VANET channel with a frequency of 5.89 GHz, due to the weak ability of diffraction, experience significant attenuation up to the complete blocking line of sight. Obstructions of the normal conditions of reception of the messages of road safety causes an increase in delivery time and probability of reception of these messages. To solve the problem of ensuring reliable delivery of the messages of road safety is proposed to add transmission SM in the channel of 5.89 GHz transmission in the UHF TV band for cognitive technologies «white spaces». Wave propagation in this part of the spectrum have a better ability to diffraction, the smaller the attenuation depending on the distance between the transmitter and the receiver, which contributes to the effective delivery of the messages of road safety in the network of VANET.