In-vehicle signal transmission method and system

Abstract

The invention relates to the technical field of vehicles, and provides an in-vehicle signal transmission method and a system thereof, which are used for realizing the process that a signal sending end in a vehicle transmits a message to a signal receiving end in the vehicle through a gateway. The method comprises the following steps: at the signal sending end, obtaining and dividing a message to be sent into a plurality of signal groups, determining safety verification related parameters corresponding to at least one signal group needing to be subjected to end-to-end protection, writing the determined safety verification related parameters into the corresponding signal group, generating a message in a first format for all signal groups, and sending the message to the gateway; at the gateway, splitting the message in the first format into a plurality of messages in a second format corresponding to each signal group by taking the signal group as a unit, and sending the messages in the second format to a signal receiving end; at a signal receiving end, verifying the message in the second format with the safety verification related parameters so as to complete signal transmission. According to the invention, the transmission speed of signals in the vehicle can be improved, and the hardware requirement of the gateway is reduced.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to an in-vehicle signal transmission method and system thereof. Background technique [0002] Electronic and electrical architectures in automobiles such as figure 1 As shown in , the vehicle is divided into multiple network segments according to functional domains. For example, network segment 1-network segment 4, each electronic control unit (ECU, Electronic Control Unit) is divided into each network segment, for example, ECU1 and ECU2 are on network segment 1, where different network segments may use different communication Protocols, such as CAN communication protocol or CAN FD communication protocol, network segments of different communication protocols are connected through a gateway, and the main function of the gateway is to route signals and messages between network segments of different communication protocols. The functional safety level in the signal transmission proc...

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Problems solved by technology

[0004] The current message transmission method has the following problems: 1) The delay of the message transmission path is too large. After the gateway receives the CANFD message, it needs to perform multiple calculations of CRC and Counter values, resulting in the path where the message is sent from ECU1 to ECU8. If the delay is too large, it will easily lead to low system stability and long user operation delay; 2) Once the complete message protected by E2E is split or destroyed, the functional safety level of the gateway is required to reach the highest level, and the cost expensive

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