Abstract: Aiming at the problems of low throughput and superimposed communication domain of the single-channel cooperative downloading method in the current internet of vehicles, a multi-channel cooperative downloading strategy of vehicle networking based on opposite cooperative vehicle group (McDvg) is proposed. Utilizing the characteristics of large meeting probability, multiple retransmission of communication and extension of data transmission time of opposite cooperative vehicle group to form a vehicle group in a local area, we design a car selection strategy to select a suitable oncoming vehicle to carry the data required by the user to provide cooperative download for target vehicles. The method utilizes the opposite cooperative vehicle group to effectively extend the cooperative download time of the target vehicle, and adopts a multi-channel strategy to solve the communication conflict problem in the case of a single channel. At last, the scheme is verified by corresponding simulation experiments. The simulation results show that this method can significantly improve the download throughput and reduce the communication delay in the blind zone, so as to provide effective service support for the current internet of vehicles.

Key words: cooperative car group, cooperative downloading, car selection strategy, multi-channel strategy, VANET