In-Vehicle Communication System Using Portable Device Data Store
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Solution Overview
Problem
In-vehicle communication systems fail to provide passengers with desired services when the vehicle is outside a communication service area or in a poor radio signal environment, as the in-vehicle apparatus cannot receive and output data from the center apparatus.
Innovation Solution
An in-vehicle communication system comprising an in-vehicle apparatus and a portable device, where the portable device can store data received from the center apparatus and transmit it to the in-vehicle apparatus if a data request cannot be fulfilled due to a weak signal, allowing the in-vehicle apparatus to output the data and provide services even outside communication service areas or in poor signal environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the in-vehicle apparatus directly receives data from the center apparatus, then data can be obtained in real-time when signal is strong, but data cannot be received when the vehicle is outside communication service area or in poor signal environment
Solution Approach 1:
The portable device stores data in advance when the signal environment is good (within communication service area with strong signal). This preliminary storage action enables the system to retrieve and output previously stored data when the signal environment deteriorates (outside service area or poor signal), thus resolving the contradiction between real-time data reception and adaptability to signal environment changes
Solution Approach 2:
The portable device acts as an intermediary between the center apparatus and the in-vehicle apparatus. It receives data from the center apparatus when signal is available, stores it locally, and then transmits it to the in-vehicle apparatus when needed. This intermediary role allows the system to overcome direct communication failures in poor signal environments while maintaining data availability
2Adaptability or versatility
If the in-vehicle apparatus relies on direct communication with the center apparatus, then communication architecture remains simple, but service availability is limited to areas with good signal coverage
Solution Approach 1:
Data is preliminarily stored in the portable device's storage unit when communication conditions are favorable. This advance preparation extends service availability beyond areas with good signal coverage without requiring complex alternative communication architectures, as the system simply switches to using pre-stored data when direct communication fails
Solution Approach 2:
The portable device creates a local copy of data received from the center apparatus. This copying mechanism enables the in-vehicle apparatus to access data without requiring complex redundant communication paths or architecture changes, simply by retrieving the copied data from the portable device when direct communication is unavailable
Data Source
AI summary
An in-vehicle communication system is disclosed. In the in-vehicle communication system, when a portable device has received a data request specifying a specific data from an in-vehicle apparatus, the portable device determines whether the portable device can receive the specific data from a center apparatus. When the portable device determines that the portable device cannot receive the specific data from the center apparatus and that the specific data is stored in a data storage area of the portable device, the portable device transmits the specific data stored in the data storage area to the in-vehicle apparatus.