Hysteresis-Based Road Event Message Publishing
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Solution Overview
Problem
Traffic service providers face challenges in efficiently publishing, updating, and canceling road event messages due to high volumes of real-time reports, leading to wasted computing and bandwidth resources and poor user experience from duplicate messages.
Innovation Solution
Implementing a hysteresis-based system that computes upper and lower confidence thresholds for road event messages, allowing for selective publishing and reducing unnecessary message generation by monitoring confidence levels and applying a lag in message updates and cancellations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If road event messages are published for every detected road event, then real-time traffic information coverage is improved, but computing resources and bandwidth resources are overwhelmed
Solution Approach 1:
The patent applies parameter changes by introducing confidence thresholds (upper and lower thresholds) as filtering parameters. Road event messages are only published when confidence levels exceed the upper threshold, and only canceled when dropping below the lower threshold. This parameter-based filtering resolves the contradiction by selectively publishing messages based on confidence parameters, reducing resource consumption while maintaining reliable coverage for significant events.
Solution Approach 2:
The patent introduces an intermediary mechanism (the hysteresis buffer between upper and lower thresholds) that mediates between detecting road events and publishing messages. This intermediary layer prevents direct one-to-one mapping between detections and publications, allowing the system to filter out low-confidence events and reduce bandwidth usage while still publishing high-confidence events reliably.
2Loss of information
If road event messages are published frequently to ensure real-time information, then information freshness is improved, but duplicate and unnecessary messages increase
Solution Approach 1:
The patent uses parameter changes by establishing confidence level thresholds that control message publication. Messages are published only when confidence exceeds the upper threshold, ensuring information freshness for significant events while reducing the quantity of messages by filtering out low-confidence detections. This resolves the contradiction between information freshness and message quantity.
Solution Approach 2:
The patent implements feedback through continuous monitoring of confidence levels against thresholds. The system provides feedback by comparing current confidence levels with historical thresholds, publishing messages only when confidence feedback indicates significant changes. This feedback mechanism ensures fresh information is published while avoiding duplicate messages from transient confidence fluctuations.
3Quantity of substance
If confidence thresholds are lowered to publish more road event messages, then message coverage is improved, but resource waste from unnecessary messages increases
Solution Approach 1:
The patent applies parameter changes by using a pair of thresholds (upper and lower) rather than a single threshold. This dual-threshold parameter system allows the patent to publish messages for high-confidence events (improving coverage) while filtering out low-confidence events (reducing resource waste). The hysteresis buffer between thresholds prevents oscillation and unnecessary message publication.
4Loss of energy
If confidence thresholds are raised to reduce message publication, then resource consumption is reduced, but information coverage decreases
Solution Approach 1:
The patent uses parameter changes by establishing an upper threshold for publication and a lower threshold for cancellation. This parameter configuration allows the system to raise the publication threshold (reducing resource consumption) while maintaining coverage for significant events that exceed the upper threshold. The lower threshold ensures that once published, messages remain active until confidence significantly drops.
5Stability of the object's composition
If hysteresis buffer between thresholds is widened, then message stability is improved, but responsiveness to actual road events decreases
Solution Approach 1:
The patent applies parameter changes by adjusting the hysteresis buffer width between upper and lower thresholds. A properly calibrated hysteresis buffer provides stability by preventing oscillation (improving message stability) while maintaining responsiveness by ensuring the buffer is not so wide that it delays necessary message publication. The threshold parameters are tuned to balance stability and responsiveness.
6Speed
If hysteresis buffer between thresholds is narrowed, then responsiveness to road events is improved, but message oscillation and duplicates increase
Solution Approach 1:
The patent uses parameter changes by optimizing the hysteresis buffer width to prevent oscillation. The upper and lower threshold parameters are configured so that the buffer is narrow enough to maintain responsiveness but wide enough to prevent message oscillation and duplicates. This parameter tuning resolves the contradiction between responsiveness and stability.
Data Source
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AI summary
An approach is provided for publishing a road event message according to a hysteresis. For example, the approach involves processing a road report to determine a road event associated with a geographic location and a confidence metric of the road event. The approach also involves initiating a publishing of a road event message to indicate the road event for the geographic location based on determining that the confidence metric is greater than an upper threshold of a hysteresis. The approach further involves processing one or more other road reports to update the confidence metric of the road event. The approach further involves initiating a cancelling of the road event message based on determining that the updated confidence metric is less than a lower threshold of the hysteresis.