Relay Device Switching Communication Paths to Reduce Transmission Delay
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Solution Overview
Problem
Conventional relay devices using Ethernet protocol face delays in data transmission, leading to uncomfortable user experiences due to prolonged response times in vehicle communication systems, as they store data until the storage limit is reduced, causing delays in processing instructions.
Innovation Solution
A relay device with a storage unit, transmission units, and a data amount determination unit that stores data from one communication path, transmits it, and sends instruction data to switch to another path when the data amount exceeds a threshold, allowing for efficient data transmission by stopping transmission on one path and resuming on another.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is stored in the storage unit until the storage limit is reduced, then the relay device can manage data transmission, but the transmission time becomes excessively long causing delays
Solution Approach 1:
The relay device transmits instruction data to the communication device in advance, instructing it to stop transmission through the first communication path before the storage unit reaches its upper limit. This preliminary action prevents the delay that would occur if the relay device had to wait until the storage limit was approached before taking action.
Solution Approach 2:
The relay device monitors the amount of data stored in the storage unit and provides feedback by transmitting instruction data to the communication device when the data amount reaches a predetermined threshold. This feedback mechanism enables the system to adjust transmission behavior proactively, preventing excessive data accumulation and reducing transmission delays.
2Productivity
If the communication device stops transmission until the storage unit is reduced, then data transmission can be controlled, but the response time becomes slow affecting user experience
Solution Approach 1:
The communication device receives and processes instruction data in advance, stopping transmission through the first communication path before the storage unit reaches its limit. This preliminary action ensures that the device is ready to switch to the second communication path without delays, improving response time while maintaining transmission control.
3Device complexity
If data is transmitted through a single communication path, then the system is simple, but delays occur when the storage unit approaches its limit
Solution Approach 1:
The relay device acts as an intermediary that monitors data amounts and transmits instruction data to the communication device. This intermediary function enables the system to switch between communication paths based on data accumulation, reducing delays while maintaining relative system simplicity through centralized control.
Solution Approach 2:
The system dynamically switches between the first and second communication paths based on the amount of data stored in the storage unit. When the data amount reaches a threshold, the communication device stops using the first path and switches to the second path, providing adaptive transmission that reduces delays while maintaining operational simplicity.
Data Source
AI summary
In a relay device, a control unit stores, in a temporary storage unit data which is received by an Ethernet communication unit through a communication line. When the data stored in the temporary storage unit is transmitted, the control unit deletes the transmitted data from the temporary storage unit. When the control unit determines that, for the data received by the Ethernet communication unit, the amount of data stored in the temporary storage unit is equal to or greater than a threshold value, the Ethernet communication unit transmits instruction data giving an instruction to stop transmission through a communication line and to perform transmission through a communication bus.