Dynamic Voice Message Priority Sequencing in Navigation Systems
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Solution Overview
Problem
Conventional navigation systems face challenges in sequencing voice messages effectively when multiple intersections and hazard locations are present within a certain range, leading to potential missed alerts as voice messages may overlap, and the priority sequence is not always adaptable to the vehicle's state.
Innovation Solution
A navigation system that includes a detection module for location and speed, a voice message weight storage system, and a priority decision module using priority rules and weights to determine the optimal sequence of voice messages based on the vehicle's location and speed, ensuring timely and relevant alerts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If voice messages are output in a fixed predetermined priority sequence, then the system is simple to implement, but the voice message output sequence is not always suitable to the state of the vehicle
Solution Approach 1:
The patent implements dynamic priority assignment by calculating priority values based on real-time vehicle state parameters (speed, location) and message attributes (weight, distance). The priority decision unit dynamically adjusts the output sequence of voice messages according to current driving conditions, transforming the static fixed-priority system into a dynamic adaptive system that responds to changing vehicle states.
2Loss of information
If multiple voice messages are output simultaneously, then all information is conveyed, but the vehicle may reach the intersection or hazard location before the outputting ends
Solution Approach 1:
The patent changes the parameter of message priority based on vehicle speed and distance to the target location. By calculating priority values using these parameters, the system determines the optimal output sequence that ensures critical messages are delivered at appropriate times, preventing information loss while maintaining timely delivery reliability.
Solution Approach 2:
The detection unit continuously monitors vehicle state (speed, location) and feeds this information back to the priority decision unit, which adjusts the message output sequence in real-time. This feedback mechanism ensures that the system adapts to changing conditions and maintains both information completeness and delivery reliability.
3Reliability
If voice messages are output with high priority to ensure timely delivery, then safety is improved, but the sequence may not be optimal for all vehicle states
Solution Approach 1:
The patent uses parameter changes to resolve this contradiction by making priority values dependent on vehicle state parameters. The priority decision unit calculates dynamic priority values based on speed, distance, and message weight, allowing the system to maintain timeliness for critical messages while adapting the sequence to different vehicle states, thus achieving both reliability and flexibility.
Data Source
AI summary
A navigation system comprises a detection part for detecting a location and a speed of a navigation apparatus, a voice message weight storage part for storing voice message weight association information, which associates a weight with each of multiple voice messages, a rule storage part for storing priority rule information denoting a rule for deciding a priority for each of multiple voice messages, a priority decision part for deciding a priority for each of the multiple voice messages based on the priority rule information, and a voice output part for outputting from the navigation apparatus multiple voice messages in a sequence conforming to the decided priority. The rule denoted by the priority rule information is a rule for deciding the priority for each voice message based on the detected location and speed of the navigation apparatus, and the weight of each voice message denoted by the voice-weight association information.