Information sending method for Internet of Vehicles, corresponding vehicle-mounted device and vehicle
An in-vehicle device and information transmission technology, applied in the field of Internet of Vehicles communication, can solve the problems affecting the communication efficiency of the Internet of Vehicles, actual utility discrimination, waste of channel resources, etc., and achieve the effects of reducing channel congestion, improving communication efficiency, and reducing conflicts.
Active Publication Date: 2018-11-06
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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Problems solved by technology
This approach cannot identify the actual utility of the information sent by vehicles contending for the channel. There are situations where vehicles that do not actually need to send information still participate in the competition for the channel. At this time, the information sent by vehicles occupying channel resources may be unnecessary. Redundant information leads to redundant conflicts and waste of channel resources, which affects communication efficiency in the Internet of Vehicles
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[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0024] In the actual application scenario of the Internet of Vehicles, one of the main scenarios that is likely to cause channel congestion is that a large number of vehicles are concentrated in the same or adjacent area, such as the situation where there is a large amount of traffic on the road and the speed of the vehicle is relatively slow. In this scenario, the position of the vehicle itself changes relatively little, but under the requirements of the traditional Internet of Vehicles protocol, relatively concentrated vehicles still need to report their position information to the surrounding vehicles at a high frequency. After research, the inventors found that for a vehicle whose position changes little or whose position change is easily estimated by its surrounding vehicles, the vehicle does not need to frequently send information about it...
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The present invention provides an information sending method for the Internet of Vehicles, comprising: step 102, estimating the current position of the vehicle according to the local historical data of the vehicle; step 104, combining the estimated position information with the current time of the vehicle Compare the actual position information of the vehicle to obtain the error between the estimated position information and the actual position information; step 106, according to the error, determine whether the vehicle sends its current movement to other devices in the Internet of Vehicles status information. The invention also correspondingly provides a vehicle-mounted device and a vehicle. The technical solution of the present invention can identify the actual utility of the information sent by the vehicles competing for the channel, so that the information can be sent on demand, effectively reducing the channel congestion of the Internet of Vehicles, and improving the communication efficiency in the Internet of Vehicles.
Description
technical field [0001] The present invention relates to the technical field of Internet of Vehicles communication, in particular, the present invention relates to an information sending method for Internet of Vehicles, a corresponding vehicle-mounted device and a vehicle. Background technique [0002] The Internet of Vehicles is an important part of the intelligent transportation system. Through the communication between vehicles, the driver can timely and accurately understand the running status of other vehicles outside the field of vision, thus providing guarantee for safe driving. [0003] At present, the Internet of Vehicles uses the 802.11p protocol. In this protocol, vehicles compete for channels through carrier sense and interference avoidance mechanism (CSMA / CA, Carrier Sense Multiple Access with Collision Avoidance). When a user obtains the right to use the channel, it will send its current motion parameters to the surrounding vehicles in the form of broadcast, so ...
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IPC IPC(8): H04L29/08
CPCH04L67/12H04L67/55H04L67/52
Inventor 刘航周一青田霖石晶林
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI