A Design Method of Communication Protocol for Internet of Vehicles

Abstract

The invention discloses an IOV (Internet of Vehicles) communication protocol design method. An information communication protocol between a vehicle terminal and a cloud terminal comprises data length, vehicle-mounted product ID, data and CRC (Cyclic Redundancy Check), wherein the data is classified into six types; a vehicle information cycle packet, a diagnosis event packet and a buffer retention packet belong to a transmission type; a vehicle information cycle acknowledgement packet, a diagnosis event request packet and a buffer retention acknowledgement packet belong to a receiving type; a data frame structure consists of solid data and dynamic data; the solid data comprises ID definitions of the six types of functional packets, time, vehicle sleep states, delayed information states, delayed meters and vehicle information update mark bits; packets which are not transmitted successfully serve as buffer detention packets. The vehicle information update mark bits are used for determining whether comparison data of the current time and previous time in vehicle information is updated or not and marking the updated data; dynamic data is vehicle information with update changes. By virtue of adopting a method of designing a solid data format and a dynamic data format and setting data mark bits, complete data can be obtained with minimal data expenses, and the IOV data transmission cost is greatly lowered.

Description

technical field [0001] The invention relates to the Internet of Vehicles technology, in particular to the software design technology of the communication protocol between the vehicle terminal and the cloud. Background technique [0002] One of the basic functions of the Internet of Vehicles is to realize the extraction and utilization of vehicle operating data, and to effectively monitor the operating status of vehicles and provide comprehensive services according to different functional requirements; generally speaking, the Internet of Vehicles is composed of three terminals, namely The car terminal, the cloud and the client; and effective data communication between these three terminals is required, which requires the formulation of a data transmission protocol. [0003] Generally speaking, data information includes vehicle CAN bus information, sensor information, GPS location information, etc. More and more information needs to be transmitted, which will lead to an incre...

AI Technical Summary

Problems solved by technology

For example, a lot of data may not change in a short period of time, but it is still frequently uploaded periodically, resulting in waste of resources. If the mobile network signal is not good, it will also cause a large backlog of data, and there is a risk of loss

Images