Vehicle Gateway Message Transmission Stability
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Solution Overview
Problem
The instability of Controller Area Network (CAN) networks in vehicles leads to unreliable message transmission due to lost or garbled messages, as the receiving unit cannot determine the transmission status of messages, resulting in low reliability.
Innovation Solution
A method and apparatus for message transmission in a CAN network where a gateway determines its current state and generates an instruction message indicating this state, which is then sent to the receiving unit, allowing the receiving unit to respond accordingly, including using default or timeout values to indicate message loss or delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gateway stops sending messages or sends garbled text when message loss is detected, then the gateway attempts to protect the receiving unit, but the receiving unit cannot determine the transmission status and cannot respond accordingly, resulting in low reliability
Solution Approach 1:
The gateway sends feedback information (instruction messages) to the receiving unit to indicate the current transmission status. This allows the receiving unit to understand whether messages are being lost or garbled and respond accordingly, resolving the information loss problem while improving reliability
Solution Approach 2:
The gateway acts as an intermediary that detects transmission issues and communicates their status to the receiving unit through instruction messages. This intermediary role enables the receiving unit to respond appropriately without directly experiencing the transmission failures
2Reliability
If the gateway continuously monitors and reports transmission status, then the receiving unit can respond accordingly to improve reliability, but the system complexity increases due to additional state determination and message generation mechanisms
Solution Approach 1:
The gateway uses different parameter values (default value, timeout value) in instruction messages to represent different transmission states. This allows the gateway to communicate complex status information using simple parameter variations, reducing the complexity of state representation while maintaining reliable communication
Data Source
AI summary
The present invention provides a method and an apparatus of message transmission in vehicle communication field. The method includes: determining current state of a gateway; generating instruction message indicating the current state in accordance with the current state of the gateway; and transmitting the instruction message to a receiving unit. The present invention solves the problem of a lower message transmission stability, improves the message transmission stability. The present invention is for message transmission in a network.