Switching method and system during hybrid communication of vehicles

Abstract

The invention relates to a switching method and system during hybrid communication of vehicles. The method comprises the following steps: acquiring a data download request; judging whether a target vehicle is within a coverage range of a RSU (Road Side Unit); if the target vehicle is within the coverage range of the RSU, performing V2I (Vehicle-to- Infrastructure) communication; if the target vehicle is not within the coverage range of the RSU, performing V2V (Vehicle-to-Vehicle) communication; judging whether vehicles with cached data exist in a same lane; if the vehicles with the cached dataexist in the same lane, then selecting the vehicles with the cached data nearest to the target vehicle to establish a connection; and if the vehicles with the cached data do not exist in the same lane, acquiring vehicles in a slow lane and a fast lane, and selecting the vehicles with the longest single communication time length to establish the connection. According to the switching method duringthe hybrid communication of the vehicles provided by the invention, efficient data download is performed by reasonably selecting the communication modes of V2V and V2I, so that the basic requirementsof low delay and high reliability are met, and the total switching number of times is minimized as much as possible, thus saving the transmission overhead.

Description

technical field [0001] The present invention relates to a data transmission method, and more specifically refers to a switching method and a system thereof during mixed vehicle communication. Background technique [0002] With the rapid development of the Internet of Vehicles, the demand for information from vehicle users has increased dramatically. Under the conditions of low latency and high reliability, the transmission of entertainment information and vehicle software with a data volume of tens of megabytes or even hundreds of megabytes has attracted more and more researchers' attention. [0003] In order to alleviate the pressure on the central server, some data is more cached on the roadside roadside unit (RSU) or driving vehicles. Vehicles with service needs can choose the nearest access point to download data, thereby improving information quality. sharing rate and reduce the user's waiting time. In addition, under normal circumstances, V2I (vehicle-to-infrastructu...

AI Technical Summary

Problems solved by technology

In addition, under normal circumstances, V2I (vehicle-to-infrastructure) communication is more stable and has a faster transmission rate than V2V (vehicle-to-vehicle) communication, so it is the preferred communication mode. When the RSU is fully covered and the speed of the vehicle is different, especially in multi-lane scenarios, the vehicle can download data more quickly and efficiently from the RSU or vehicle that has cached target data around it, but currently these two methods cannot be switched freely. Meet the basic requirements of low latency and high reliability. If switching is forced, it will lead to a lot of switching times and increase transmission overhead

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