In-Vehicle Data Collection via Adaptive Bus Load Control
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Solution Overview
Problem
Existing vehicle data collection methods face challenges in maintaining data continuity and preventing network congestion in intravehicular communication systems, leading to reduced analysis accuracy and potential interruptions during vehicle operation.
Innovation Solution
An external vehicle data collecting apparatus that detects bus usage rates and adjusts data request signal transmission intervals to avoid network congestion, ensuring continuous data collection by transmitting signals only when the bus usage rate is below a threshold, and interpolating missing data when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data request signals are transmitted continuously to collect driving parameter data, then data collection completeness is improved, but network congestion occurs and data continuity is lost
Solution Approach 1:
The system transmits data request signals at equal periodic intervals rather than continuously. The transmission interval setting unit sets equal transmission intervals in a predetermined period with respect to each data request signal, creating a rhythmic transmission pattern that prevents network overload while maintaining data collection effectiveness.
Solution Approach 2:
The system dynamically adjusts data collection based on real-time network conditions. The bus usage rate detecting unit monitors network load, and the selecting and setting unit selectively activates data request signals based on current bus usage rates, making the transmission pattern adaptive rather than static.
2Productivity
If multiple data request signals are transmitted simultaneously to collect comprehensive data, then data collection efficiency is improved, but bus usage rate increases causing network congestion
Solution Approach 1:
The system segments the data collection process by dividing multiple data request signals into separate time slots. Instead of transmitting all requests simultaneously, each request is transmitted at its own equal interval, distributing the communication load across time and preventing bus saturation.
Solution Approach 2:
Each data request signal is transmitted at equal periodic intervals, creating a structured rhythm that distributes communication traffic evenly across the network. This periodic transmission pattern prevents traffic spikes that would cause congestion while maintaining comprehensive data collection.
3Object-affected harmful factors
If data request signals are transmitted at irregular intervals to adapt to network conditions, then network congestion is avoided, but data continuity is lost reducing analysis accuracy
Solution Approach 1:
The system changes the parameter of transmission timing from irregular to equal intervals. By setting fixed equal transmission intervals for each data request signal, the system creates predictable, uniform data collection patterns that maintain continuity and enable accurate analysis, while still adapting overall collection rates to network conditions.
Data Source
AI summary
A vehicle data gathering apparatus that implements a vehicle data gathering method includes: a bus use rate detection means connected to an in-vehicle network for detecting a bus use rate in the in-vehicle network; a selection setting means for selecting and setting a plurality of data request signals to be transmitted to at least one of a plurality of ECUs; a transmission interval setting means for setting a uniform transmission interval for each data request signal in a predetermined period on the basis of the number of the data request signals set by the selection setting means; and a request signal transmission means for transmitting each data request signal at the set uniform interval when it is determined that the bus use rate is lower than a first threshold value.