Probe Data Collection Server Thinning via Correction Values
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional probe data collection methods fail to ensure real-time data transmission and control communication load effectively, as the timing of data reception cannot be controlled on the server side, leading to biased intervals and excessive data volume.
Innovation Solution
The server calculates correction values for upload times based on the total number of vehicles and transmits them to control the data transmission timing, implementing thinning, data number reduction, vehicle reduction, and equalization corrections to manage data reception and load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the server receives all probe data transmitted from vehicles without control, then the real-time nature of probe data is secured, but the communication load of the server becomes excessive
Solution Approach 1:
The server controls probe data reception by periodically adjusting upload time correction values based on vehicle density. When vehicle density is high, the server increases correction values to extend upload intervals, effectively implementing periodic throttling of data reception to reduce communication load while maintaining real-time monitoring capability.
Solution Approach 2:
The system dynamically adjusts the upload time correction values based on real-time vehicle density conditions. The server modifies the data reception frequency adaptively - increasing correction values when vehicle density is high to reduce load, and decreasing them when density is low to maintain real-time data collection efficiency.
2Quantity of substance
If the server receives probe data from all vehicles simultaneously, then data collection completeness is improved, but biased intervals in data reception occur
Solution Approach 1:
The server introduces asymmetric adjustments to upload times for different vehicles based on their individual conditions and vehicle density. By applying different correction values to different vehicles rather than uniform intervals, the system eliminates biased reception patterns while maintaining overall data collection completeness.
Solution Approach 2:
The server implements feedback control by monitoring data reception intervals and adjusting upload time correction values accordingly. When biased intervals are detected, the server modifies correction values to redistribute upload times, ensuring more uniform data reception across different vehicles while maintaining complete data collection.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
To provide a probe data collection method that is capable of both ensuring the real-time nature of the collected probe data and reducing the communication load of the server. On the basis of the received probe data, the total number of vehicles that have transmitted probe data and the upload times of the probe data for each vehicle (30) are detected, and on the basis of the detected upload times, correction values of the upload times are calculated for each vehicle (30) according to the total number of vehicles. Then, the calculated correction values are transmitted to the respective vehicles (30).