Low-delay end-to-end communication method based on CAN bus

Abstract

The invention relates to a low-delay end-to-end communication method based on a CAN bus. The method comprises the following steps: connecting a plurality of spacer layer devices with a CAN communication gateway through the CAN bus; connecting the CAN communication gateway an external device through a low-delay PHY Ethernet port or a 5G module, wherein the low delay is the connection of microsecond-level time delay; when the spacer layer device communicates with the CAN communication gateway, using a method of priority automatic conversion or intelligent adjustment of the CAN load rate so thatthe communication delay is lower than 5ms. The method is suitable for a standard CAN bus hardware lower-layer protocol, formulates a standard protocol for an application layer, realizes 'low delay' and 'end-to-end' communication characteristics by embedding CPU software and hardware for optimization, and can also solve the problem of 'last kilometer communication' data high-speed communication.

Description

Technical field [0001] The present invention relates to the field of electronic technology, in particular to a "low delay, end-to-end" method suitable for implementing one of the 5G core technologies through the CAN bus. Background technique [0002] With the development of new technologies such as the Industrial Internet, Internet of Things, 5G, and artificial intelligence, data transmission requirements for smart devices in the power energy field are getting higher and higher. At present, China’s 5G suppliers Huawei and ZTE are both addressing public network construction. Latency and end-to-end communication are one of the important indicators of 5G technical indicators. 5G proposes millisecond end-to-end delay requirements. Ideally, the end-to-end delay is 1ms, and the typical end-to-end delay is about 5-10ms. . "Low latency and end-to-end" technical indicators are one of the important indicators for achieving electrical industrial control and industrial interconnection. The...

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Problems solved by technology

[0005] The focus of the present invention is to solve the problem of "low delay, end-to-end" communication of "last mile communication". The "low latency" of the equipment is transmitted to the execution layer of the power equipment. This protocol has the "low latency" feature of the CAN bus, and the data transmission delay of the CAN bus protocol layer is lower than 5ms

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