Inter-vehicle cooperation downloading scheme based on feedback method

Abstract

The invention provides an inter-vehicle cooperation downloading scheme based on a feedback method to overcome the effects that in an existing vehicle data downloading method and technology, contradiction exists among the coverage area, the data downloading rate and the traffic expenses. According to the method, the data downloading time of a single vehicle can be obviously shortened. Meanwhile, due to the fact that data can be shared through V2V communication, time is shortened, no expenses are produced when V2V communication is used, and the expenses for data downloading are greatly lowered. The 3G communication method and the DSRC communication method are utilized at the same time, the 3G communication method is used as a control channel and responsible for uploading request information to a roadside access point so that data can be prepared well before the vehicle passes by the roadside access point, the DSRC communication method is used for downloading the data, and therefore the data can be downloaded at a high speed.

Description

Technical field: [0001] The invention belongs to the field of traffic, in particular to the field of downloading data files in traffic. Background technique [0002] At present, with the development of the Internet of Vehicles (VANET) [HARTENSTEIN H, LABERTEAUX K P.Vanet vehicular application and inter-network technologies[M].] and the continuous improvement of standards, people are more and more interested in the commercial development of vehicle data information services. More and more interesting, such as in-vehicle entertainment and in-vehicle office [UZCATEGUI R, ACOSTA-MARUM, G. Wave: a tutorial [J]. IEEE Communication Magazine. 2009: 126-133.]. Therefore, it is foreseeable that more and more cars will be equipped with on-board wireless communication equipment in the near future, and we will go one step further towards smart life. Intelligent transportation systems have very broad application scenarios: push more detailed local traffic information to vehicles (such as...

AI Technical Summary

Problems solved by technology

[0004] However, these two communication methods have their limitations: for 2G / 3G networks, the data transmission speed is not high and the price is expensive, especially compared to downloading large file data, so the scope of related vehicle service applications is greatly reduced. Applications that require a large amount of data or real-time communication, such as on-board office and on-board entertainment, cannot be realized with existing technologies; while DSRC communication meets high data communication requirements but is limited by the coverage of roadside basic access points And the distribution density of access points is difficult to guarantee continuous and seamless communication requirements 2040.]

[0016] Because of the random downloading of data from the access point, there is a situation where the download content is repeated. It is not worthwhile to waste communication opportunities when the opportunity to establish a communication connection with the access point is very precious.

Secondly, the vehicle has a limited chance of encountering another vehicle that has the data content it wants to download, and the premise is that the vehicle will ask all the vehicles it encounters whether they have relevant data content, which will easily cause communication flooding and block communication channels , but the data transmission rate drops

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