Distributed fountain code-based Internet of Vehicles-assisted download method

Abstract

The invention belongs to the technical field of Internet of Vehicles communication, and relates to a method for assisting downloading of Internet of Vehicles based on distributed fountain codes. In the process of the present invention, the assisting vehicle encodes the data to be downloaded, and when the target vehicle is within the communication range of the assisting vehicle, the assisting vehicle broadcasts and sends the data packets. All other vehicles receive data packets. When the assisting vehicle leaves the communication range of the target vehicle, if the target vehicle fails to receive enough data encoding packets to restore the original data, other assisting vehicles carrying packet information within the target vehicle’s communication range will continue to forward data packets for it , until the target vehicle receives enough data to restore the original data, and an assisted download process ends. The invention combines the distributed fountain code technology with the Internet of Vehicles environment for the first time, and has the advantages of high channel utilization rate and low packet loss rate.

Description

technical field [0001] The invention discloses a method for assisted downloading of the Internet of Vehicles based on distributed fountain codes, and relates to the technical field of Internet of Vehicles communication. Background technique [0002] In the field of Internet of Vehicles, a very important research direction is the high-speed and stable transmission of data packets. In the Internet of Vehicles environment, due to the short encounter time of vehicles, fast running speed, frequent changes in vehicle speed, and poor channel quality, traditional assisted downloading has a high packet loss rate, and the data carried by the assisted vehicle cannot be completely guaranteed to be transmitted to The target vehicle, which does not guarantee the application of high system QoS requirements. [0003] Traditional assisted downloading methods, such as Mob Torrent’s proposal of using WIFI and WWAN to complement each other and using the same direction and opposite vehicles to ...

AI Technical Summary

Problems solved by technology

[0007] The present invention is to solve the problem of high packet loss rate in the assisted downloading of data in the Internet of Vehicles environment, so a method for assisted downloading in the Internet of Vehicles based on distributed fountain codes is proposed

[0008] The assisted downloading method of the Internet of Vehicles based on the distributed fountain code proposed by the present invention is based on the short encounter time of vehicles in the Internet of Vehicles environment, fast running speed, frequent changes in vehicle speed, and poor channel quality, resulting in a high packet loss rate for assisted downloading. The problem that the data carried by the assistance vehicle cannot be guaranteed to be fully delivered to the target vehicle

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