Information transmission method, traffic control unit and on-board unit

Abstract

The embodiments of the invention provide a method for transmitting road information, a traffic control unit (TCU) and an on-board unit (OBU). The method includes the following steps: a TCU acquires aplanned path of a vehicle; the TCU extends the planned path to generate an available driving area of the vehicle on the planned path, wherein the available driving area includes a safety driving areaof the vehicle; and the TCU sends road information to an OBU, wherein the road information includes instruction information of the available driving area. According to the embodiments of the invention, the TCU sends the available driving area to replace a high-precision map. As the data volume of the available driving area is small, the data can be transmitted at high speed and with high security,and the problem of high-precision map leakage is avoided.

Description

technical field [0001] Embodiments of the present invention relate to the field of traffic information, in particular to an information transmission method, a traffic control unit, and a vehicle-mounted unit. Background technique [0002] With the development of science and technology, transportation systems such as autonomous driving, advanced driver assistant systems (ADAS), intelligent transport system (intelligent transport system, ITS) and other transportation systems have become more and more popular. to a very important role. [0003] In the traffic system, the method of saving high-precision maps locally (that is, on the vehicle side) can be adopted, and the vehicle-mounted unit can control the vehicle according to the high-precision maps stored locally. However, due to the high precision of the high-precision map, the data volume of the high-precision map is very large (for example, the data per square kilometer reaches the gigabyte (GB) level), which makes it diff...

AI Technical Summary

Problems solved by technology

However, due to the huge amount of data in the high-precision map itself, even if it is distributed in a tiled manner, the amount of data sent at a time is very large, making it difficult for the vehicle unit to quickly receive and load the tiled map

In addition, high-precision maps are confidential data. By sending tiles, the receiving end can easily collect multiple tiles to make a copy of the map, and there is a risk of map leakage

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