In-Vehicle ECU Communication Processing With Dual Processing Units
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Solution Overview
Problem
Existing vehicle ECUs do not efficiently manage communication-related processing, leading to inefficient use of processing resources and potential increased network traffic.
Innovation Solution
A dual-processing unit system is implemented, where a high-performance first processing unit handles logical computational tasks and a lower-performance second processing unit handles communication control, with a physical layer communication unit connecting both, allowing for efficient distribution of processing loads and reduced unnecessary network traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single processing unit handles both logical computational tasks and communication control, then device complexity is reduced, but processing efficiency deteriorates due to resource contention and increased load on the processing unit
Solution Approach 1:
The patent divides the ECU into two separate processing units: a first processing unit dedicated to logical computational tasks and a second processing unit dedicated to communication control. This segmentation allows each unit to specialize in its specific function, improving overall processing efficiency while maintaining manageable device complexity through functional separation.
2Reliability
If the first processing unit handles all communication processing, then communication quality is maintained, but the load on the first processing unit increases, reducing overall system productivity
Solution Approach 1:
The patent extracts communication control functions from the first processing unit and assigns them to a dedicated second processing unit. This extraction reduces the load on the first processing unit, improving system productivity, while the second processing unit maintains communication quality through specialized handling of communication protocols and data transmission.
3Device complexity
If communication-related processing is not optimized, then device complexity remains low, but network traffic increases and processing efficiency deteriorates
Solution Approach 1:
The patent introduces a second processing unit as an intermediary between the first processing unit and the physical layer communication unit. This intermediary filters and manages communication data, preventing unnecessary traffic from being transmitted on the vehicle network, thereby reducing energy loss while maintaining relatively simple device architecture.
Data Source
AI summary
An in-vehicle device is to be connected to an in-vehicle network installed in a vehicle and includes: a first processing unit; a second processing unit connected to the first processing unit; and a physical layer communication unit connected to the second processing unit. The first processing unit includes a first upper layer communication unit corresponding to a layer that is higher than the physical layer communication unit, the second processing unit includes a second upper layer communication unit corresponding to a layer that is higher than the physical layer communication unit, the first processing unit and the second processing unit are connected via the first upper layer communication unit, and the second processing unit and the physical layer communication unit are connected via the second upper layer communication unit.