Gateway Message Timing Offset for Routing Reliability
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Solution Overview
Problem
The reliability of gateway routing in vehicle communication systems is compromised due to increased latency and bus load, especially when different communication topologies like Ethernet, CAN, and Flexray are used, making it difficult to detect errors using existing watchdog systems, and checksum codes are not effective across different channels.
Innovation Solution
A message processing method that calculates and adjusts the transmission timing offset between messages received and routed through the gateway to ensure maximum allowable latency, using a message monitoring & phase calculator to correct transmission times and maintain data integrity across channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple communication channels are used to increase data transmission capacity, then communication efficiency is improved, but latency increases and reliability decreases
Solution Approach 1:
The patent applies preliminary action by calculating the time difference between transmitted and routed messages in advance, and pre-setting a message transmission timing offset before actual communication occurs. This allows the system to proactively adjust transmission timing to maintain reliability while using multiple communication channels for improved efficiency.
2Speed
If message transmission timing is not adjusted, then communication speed is maintained, but latency-related errors occur in gateway routing
Solution Approach 1:
The patent changes the timing parameter of message transmission by calculating a time difference between transmitted and routed messages, then applying a message transmission timing offset to adjust the transmission moment. This parameter adjustment ensures that latency-related errors are prevented while maintaining communication speed within acceptable ranges.
3Reliability
If transmission timing offset is calculated and applied, then routing reliability is improved, but additional processing time is required
Solution Approach 1:
The timing offset calculation is performed in advance as a preliminary action, allowing the system to prepare the correction value before actual message transmission occurs. This minimizes the impact on real-time communication by shifting the processing burden to a pre-computation phase.
4Device complexity
If existing watchdog systems are used for error detection, then system simplicity is maintained, but error detection capability is insufficient for cross-channel communication
Solution Approach 1:
The patent introduces an intermediary mechanism by calculating and applying a message transmission timing offset that acts as a mediator between the transmitted message and the routed message. This intermediary timing adjustment ensures proper synchronization across different communication channels, enabling reliable error detection and prevention without requiring complex watchdog systems.
Data Source
AI summary
The present invention provides a message processing method of a gateway, which can improve the reliability of a routing operation of the gateway by changing the moment of message transmission. The message processing method of the gateway includes steps of (a) calculating a time difference between the transmission time of a message transmitted to the gateway and the transmission time of a message routed and transmitted from the gateway, and (b) comparing the transmission period of the message transmitted to the gateway and the transmission period of the message routed and transmitted from the gateway, when the time difference is less than a target value. (c) A message transmission timing offset is calculated according to the compared result between the transmission periods of the messages, and (d) the transmission time of the message transmitted to the gateway is changed and corrected using the message transmission timing offset.