Communication Bus Beacon Scheduling to Reduce Disturbance Noise
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication systems in vehicles generate high-intensity disturbance noise due to frequent voltage changes on the communication bus, interfering with signal transmission.
Innovation Solution
Implementing a communication system where communication devices transmit data according to a predetermined order, using a beacon signal to initiate transmission and sending dummy data when no actual data is available, thereby extending the beacon signal transmission interval and reducing voltage switching frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transmission is performed frequently on the communication bus, then communication efficiency is improved, but disturbance noise intensity increases
Solution Approach 1:
The patent implements periodic beacon signal transmission to structure data transmission intervals. By using beacon signals to mark the start of transmission periods and enforcing ordered data transmission within each period, the system creates regular transmission cycles that prevent excessive voltage switching frequency while maintaining communication efficiency. This periodic structure allows the communication bus to stabilize between transmission periods, reducing disturbance noise.
2Speed
If voltage changes frequently on the communication bus, then data transmission speed is improved, but electromagnetic wave generation increases
Solution Approach 1:
The patent applies preliminary action by transmitting dummy data in advance when no actual transmission data is available. This ensures that the communication bus maintains a steady transmission rhythm without sudden voltage changes or idle periods. By pre-filling transmission slots with dummy data, the system avoids frequent voltage changes that would generate electromagnetic waves, while still maintaining the required data transmission speed through structured communication cycles.
3Productivity
If data transmission intervals are shortened, then communication efficiency is improved, but signal disturbance increases
Solution Approach 1:
The patent uses beacon signals as intermediaries to mediate between data transmission requirements and noise reduction goals. The beacon signal marks the beginning of each transmission period and establishes a rhythm for subsequent data transmissions. This intermediary structure allows the system to maintain efficient communication through regular beacon-driven transmission cycles while preventing signal disturbance by ensuring proper timing and ordering of voltage changes on the communication bus.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces the intensity of disturbance noise by minimizing voltage switching on the communication bus, ensuring reliable data transmission and preventing signal interference.
Implementation Method 1
When the voltage of the communication bus changes, the current value of the current flowing through the communication bus changes, and electromagnetic waves are generated from the communication bus.
Data Source
AI summary
A first ECU and a plurality of second ECUs are connected to a communication bus. The first ECU repeatedly transmits a beacon signal through the communication bus. Each of the first ECU and the plurality of second ECUs transmits data according to an order set in advance when the beacon signal is transmitted. The first ECU or the second ECU transmits dummy data whose transmission destination is different from the remaining ECUs when there is no transmission data to be transmitted to one of the remaining ECUs other than itself.