In-Vehicle Gateway Data Segmentation for LAN Traffic Reduction
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Solution Overview
Problem
In-vehicle communication systems face challenges in reducing communication traffic on low-speed LANs and minimizing operations required by electronic control units when dealing with data from different local area networks, leading to synchronization issues and increased communication burdens.
Innovation Solution
An in-vehicle gateway apparatus with separate communication sections processes vehicle-related data sets to transmit them efficiently across local area networks with varying speeds, reducing data elements for lower-speed networks and synchronizing data transmission times to minimize traffic and operational loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the in-vehicle gateway apparatus converts and transmits vehicle related data to all in-vehicle LANs with the same data set, then data completeness is maintained, but communication traffic on low-speed LANs increases
Solution Approach 1:
The patent applies local quality by transmitting different data sets to different in-vehicle LANs based on their specific characteristics. High-speed LANs receive complete data sets while low-speed LANs receive reduced data sets with only essential data elements, optimizing communication traffic for each network's capabilities
Solution Approach 2:
The patent segments the vehicle related data set into different components, transmitting all data elements to high-speed LANs and only essential data elements to low-speed LANs. This segmentation allows tailored data transmission that matches each LAN's processing capabilities
2Adaptability or versatility
If ECUs are coupled to different in-vehicle LANs to access vehicle related data, then system flexibility is improved, but synchronization complexity increases
Solution Approach 1:
The gateway apparatus performs preliminary actions by pre-processing vehicle related data into different data sets before transmission. It identifies essential data elements in advance and prepares reduced data sets for low-speed LANs, preventing synchronization issues before they occur
Solution Approach 2:
The gateway apparatus acts as an intermediary between the data source and multiple in-vehicle LANs. It mediates the data transmission process by converting and adapting data sets for each LAN's characteristics, eliminating the need for ECUs to perform complex synchronization operations
3Measurement precision
If the gateway transmits complete data sets to all LANs, then data accuracy is maintained, but communication time increases
Solution Approach 1:
The patent changes the parameter of data set composition based on LAN characteristics. For low-speed LANs, it transmits reduced data sets with fewer data elements, decreasing communication time while maintaining essential information accuracy for the specific application context
Data Source
AI summary
An in-vehicle gateway apparatus includes a first communication section and a second communication section. The first communication section receives a vehicle related data set including multiple data elements from a data transmit apparatus. The second communication section transmits a processed data set processed based on the vehicle related data set to an in-vehicle LAN group including a first in-vehicle LAN and a second in-vehicle LAN. The second in-vehicle LAN has a communication speed lower than a communication speed of the first in-vehicle LAN. The second communication section transmits a first processed data set processed based on the vehicle related data set to the first in-vehicle LAN, and transmits a second processed data set processed based on the vehicle related data set and having less data elements than the first processed data set to the second in-vehicle LAN.