Vehicle Switch Device Throughput Control for Data Congestion
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Solution Overview
Problem
On-vehicle network systems face congestion issues due to large amounts of communication data, leading to instability in communication environments, as existing solutions cannot effectively prioritize and manage data transmission based on application priority levels.
Innovation Solution
A switch device with a control unit that determines the state of a storage unit and adjusts the throughput of communication data for each application by delaying ACK relay and modifying transmission size information, ensuring balanced data retention and transmission delay across priority levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If communication data is relayed without throughput adjustment, then transmission speed is maintained, but storage unit congestion occurs and communication stability deteriorates
Solution Approach 1:
The switch device dynamically adjusts the throughput of communication data for each application based on real-time storage unit state. The control unit monitors storage usage and modifies transmission rates adaptively, transitioning from static to dynamic throughput management to prevent congestion while maintaining communication stability.
Solution Approach 2:
The invention changes the throughput parameter of communication data based on storage unit conditions. By adjusting transmission parameters (throughput) according to storage state, the system optimizes the balance between communication stability and data transmission efficiency without requiring complex architectural changes.
2Reliability
If throughput is reduced to prevent congestion, then communication stability improves, but data transmission efficiency decreases
Solution Approach 1:
The switch device segments communication data by application and manages throughput for each application separately. This allows selective throughput adjustment where high-priority applications maintain higher transmission rates while low-priority applications have reduced throughput, achieving overall stability without uniform efficiency loss.
Solution Approach 2:
Different throughput qualities are applied to different applications based on their priority levels. High-priority applications receive preferential treatment with maintained throughput, while low-priority applications have throughput reduced during congestion, creating localized quality differences that optimize overall system performance.
3Speed
If data transmission is unrestricted, then transmission speed is high, but storage unit overflows and communication environment becomes unstable
Solution Approach 1:
The control unit implements feedback control by continuously monitoring the storage unit state and adjusting throughput based on current conditions. This closed-loop control prevents storage overflow by detecting approaching capacity limits and reducing throughput accordingly, maintaining both speed and stability through real-time adaptation.
Data Source
AI summary
A switch device installed in a vehicle is provided with: a switch unit configured to relay communication data between a plurality of function units installed in the vehicle; a storage unit configured to hold the communication data to be relayed; and a control unit configured to determine a state of the storage unit, and adjust, for each of applications, a throughput of the communication data to be transmitted from the function units, based on a result of the determination.