Low-latency command propagation protocol

By adopting improved system layout and line driver units in automobiles, using the combination of initiator, branch and client devices, low latency and failure-safe command propagation are achieved, solving the problems of high complexity and high latency of vehicle HMI systems in the prior art, and improving the efficiency of dynamic lighting and sensor control.

CN115997370BActive Publication Date: 2025-08-12INOVA SEMICON
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Patent Information

Application Number
CN202180043510.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2021-03-17
Filing Date
2021-09-29
Publication Date
2025-08-12
Estimated Expiration
2041-09-29

AI Technical Summary

Technical Problem

Existing fieldbus communication technologies such as CAN, LIN, I2C, SPI and Ethernet cannot meet the needs of dynamic control LEDs and sensors within the vehicle, resulting in high complexity, large latency and high cost of vehicle HMI system, which cannot achieve low latency and synchronous dynamic lighting effects and sensor control.

Method used

Using an improved system layout and line driver unit, communication is performed using unshielded twisted pair cables through a combination of initiator devices, branch devices and client devices, enabling low latency and failure-safe command propagation, supporting real-time control of multiple LEDs and sensors.

Benefits of technology

It realizes dynamic control of a large number of LEDs in low latency and synchronous ways in cars, identify and control tactile elements, and improves the driving safety and user experience of the vehicle HMI system.

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Abstract

The present invention relates to a system layout and a method that enables the operation of units in a fail-safe manner and with low-latency behavior. The invention proposes the teaching of a specific protocol that enables the exchange and routing of program packets for controlling and addressing light-emitting diodes and reading out sensors. The information is distributed according to the very specific requirements of the underlying topology and the application domain. The automotive industry has particularly stringent requirements for devices involving safety aspects. Since light-emitting diodes and sensors can affect the reliability of vehicle safety functions, special methods must be provided with regard to real-time requirements and reliability. One of the advantages provided by the invention is that, for example, a branch device can change its operating mode without an explicit command, but in general, a command can provide an expiration condition for the mode, after which the mode returns to the previous mode. Such an expiration condition can be the reception of a predefined number of specific network events. In addition, the invention also proposes a computer program product that includes control commands for executing the method or operating the device.
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Citation Information

Patent Citations

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