In-vehicle SOME/IP transmission method and device based on TSN time sensitive network

Abstract

The invention provides an in-vehicle SOME / IP transmission method and device based on a TSN time sensitive network, and the method specifically at least comprises the steps: starting a core process in an SOMEIPTTd module, and initializing a bottom socket channel; monitoring a data packet from an application layer, performing SOME / IP protocol-based packaging on the data packet through a SOMEIPTTd module, transmitting the packaged data packet to a lower-layer set byte channel, and sending the data packet to a target client; or data exchange among a plurality of application programs based on the SOME / IP protocol among the application layers is realized through the SOMEIPTTd module. According to the in-vehicle SOME / IP transmission method of the time-sensitive network, further, optionally, a SOMEIPTTd module is provided with a time timing trigger mechanism, time information is acquired through a shared memory and a gPTP core time synchronization process, and a real-time clock is recovered. Through the technical scheme, the transmitted or received data can be packaged or unpacked, so that time synchronization of data with different priorities is realized.

Description

technical field [0001] The present invention relates to the technical field of time-sensitive networks for vehicle communication, in particular to a method and device for in-vehicle SOME / IP transmission based on TSN time-sensitive networks. Background technique [0002] In recent years, with the development and progress of technology, it has promoted the progress of the automobile industry, and the automobile industry has continued to move forward in the direction of assisted driving, automatic driving, and unmanned driving, making the traditional vulgar and high-reliability transmission CAN bus unable to meet the requirements of image or The sensors of video and lidar need high bandwidth and low latency, and the in-vehicle Ethernet bus technology has high bandwidth, real-time performance and low cost. The protocol performs data communication, but based on the current time-sensitive network (TSN), it mainly works at the OSI-2 data link layer. The native TSN is evolved from A...

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the development and progress of technology, the progress of the automobile industry has been promoted, and the automobile industry has continued to move forward in the direction of assisted driving, automatic driving, and unmanned driving, making the traditional vulgar, high-reliability transmission CAN bus unable to meet the image or Video and laser radar sensors require high bandwidth and low latency development requirements, and the vehicle Ethernet bus technology has high bandwidth, real-time performance and low cost, which has become an inevitable choice, and the communication of the vehicle Ethernet Time Sensitive Network (TSN) Protocol for data communication, but based on the current time-sensitive network (TSN) mainly works at the OSI-2 data link layer, the original TSN is evolved from AVB, so the current time-sensitive is mainly in the AVB data stream, that is, layer 2 Packet AVBTP

With the gradual evolution of the E / E architecture, the regional architecture has gradually become the mainstream. However, the regional architectures are connected through high-bandwidth vehicle-mounted Ethernet. Currently, ordinary Ethernet is best-effort transmission and cannot guarantee real-time transmission. The time sensitivity of TSN guarantees the real-time performance of network data, but in the internal control commands of the car, the key command transmission is transmitted through SOME / IP, but AUTOSAR does not stipulate and specify how these control commands and key data transmitted through SOME / IP are realized. Real-time, so the development of existing automobile technology urgently needs to provide a real-time transmission technology based on TSN network

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