Vehicle Communication Apparatus Position-Based Topic Subscription
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Solution Overview
Problem
In a vehicle communication system using the publish-subscribe scheme, it is challenging for a moving vehicle to automatically and efficiently subscribe to relevant topics for road traffic information as it changes location, due to the dynamic generation of topics by publisher devices and the need to manage a large number of potential topics.
Innovation Solution
A communication apparatus and information processing system that automatically notifies an external device of its position, receives and stores an identifier associated with relevant messages, and obtains information from messages matching the stored identifier, allowing for dynamic and efficient subscription to relevant topics based on the vehicle's location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle registers to all topics published by publisher devices to ensure receiving relevant road traffic information, then the completeness of information reception is improved, but the computational load and device complexity increase significantly
Solution Approach 1:
The patent extracts and utilizes only the necessary portion of topic information based on the vehicle's current position. Instead of processing all topics, the system extracts only those topics relevant to the vehicle's location, thereby reducing computational load while maintaining information completeness.
Solution Approach 2:
The patent applies local quality by making the topic subscription dynamic and position-dependent. The subscriber device subscribes to different topics based on its current position, ensuring that each location receives only the locally relevant information rather than all possible topics globally.
2Device complexity
If the vehicle manually selects and registers to specific topics to reduce computational load, then the device complexity is reduced, but the ability to automatically follow dynamically generated topics is lost
Solution Approach 1:
The patent implements feedback by continuously monitoring the vehicle's position and automatically adjusting topic subscriptions based on this feedback. The system receives position information, determines relevant topics dynamically, and updates subscriptions accordingly, maintaining automation without requiring manual intervention.
Solution Approach 2:
The subscriber device performs self-service by automatically managing its own topic subscriptions based on its position. The system independently determines which topics to subscribe to without external assistance, enabling automatic following of dynamically generated topics while reducing computational complexity.
3Adaptability or versatility
If the vehicle continuously monitors and updates topic subscriptions to follow dynamically generated topics, then the adaptability to changing locations is improved, but the loss of time and processing overhead increase
Solution Approach 1:
The patent applies preliminary action by pre-establishing the relationship between position information and topic identifiers through management information stored in advance. When the vehicle's position changes, the system can quickly determine relevant topics by referencing pre-stored management information, reducing the time required for topic selection and subscription updates.
Solution Approach 2:
The patent implements dynamics by making the topic subscription mechanism adaptive and position-dependent. The system dynamically adjusts subscriptions based on the vehicle's current position, allowing automatic following of newly published topics in different locations without requiring continuous manual reconfiguration.
Data Source
AI summary
A communication apparatus notifies an external device of position information, receives an identifier notified from the external device after notifying the position information, stores, after the identifier is received, the received identifier as management information for specifying a message that the communication apparatus is to subscribe to, and obtains, in a case where a message delivered from outside and associated with the identifier stored as the management information is received, information included in the received message.