Vehicle Network Link Status Diagnosis via Auto Negotiation
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Solution Overview
Problem
Current vehicle network technologies, such as CAN and FlexRay-based networks, fail to adequately support the higher transmission rates and system expandability required by advanced vehicle systems like telematics and infotainment systems, and diagnosing link status issues in these networks is challenging, especially when faults occur.
Innovation Solution
Implementing an auto negotiation protocol-based method for diagnosing link status in vehicle networks, which involves identifying fault types and transmitting signals with indicators to other communication nodes, using MAC frames and pulse signals in a broadcast manner, to enhance network stability and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If Ethernet-based network is used to support higher transmission rates, then transmission rate is improved, but network complexity increases
Solution Approach 1:
The patent applies parameter changes by utilizing auto-negotiation protocols that dynamically adjust transmission parameters (such as speed and duplex mode) based on link conditions. This allows the network to adapt to different transmission rates without requiring manual configuration or complex fixed-configuration hardware, thereby achieving high transmission rates while managing complexity through dynamic parameter adjustment.
2Measurement precision
If auto negotiation protocol is implemented for fault diagnosis, then fault identification accuracy is improved, but communication overhead increases
Solution Approach 1:
The patent implements preliminary action by incorporating fault diagnosis capabilities directly into the auto-negotiation protocol exchange process. Instead of separate diagnosis procedures, the protocol embeds link status indicators and fault type identification within the existing negotiation messages, allowing fault detection to occur as a byproduct of the necessary configuration exchange, thereby minimizing additional communication overhead.
Solution Approach 2:
The patent applies feedback mechanisms by including link status indicators and fault type information in the auto-negotiation protocol exchanges. Communication nodes transmit feedback about their operational status and detected faults during the negotiation process, enabling accurate fault identification while utilizing the existing bidirectional communication channel without requiring separate dedicated diagnosis messages.
Data Source
AI summary
Disclosed are link status diagnostic methods for a vehicle network. A link status diagnostic method performed in a communication node includes: identifying a type of a fault occurring in a link connected to the communication node; generating a signal including a link fault type indicator indicating the type of the fault; and transmitting the signal. Also, the signal is generated and transmitted according to an auto negotiation protocol. Therefore, stability and reliability of the vehicle network can be enhanced, thereby improving overall performance of the vehicle network.