Telematics Mode Switching with Notification-Based Data Recovery
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Solution Overview
Problem
Telematics devices with shared RF and baseband processing face performance constraints when switching between communication and navigation modes, leading to potential data losses and reduced functionality during different operations.
Innovation Solution
The telematics device optimizes switching between communication and navigation modes by using shared RF and baseband processing, allowing for efficient data handling and minimizing data losses through notification-based re-transmissions and extrapolation of location data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the radio uses shared RF and baseband processing for both communication and navigation modes, then device complexity is reduced and cost is lowered, but performance constraints occur during mode switching leading to data losses
Solution Approach 1:
The system sends a notification message to the server before switching to navigation mode, allowing the server to prepare for potential data loss by implementing re-transmission mechanisms. This preliminary action ensures that when the radio switches modes and potential data loss occurs, the server can recover the lost data through re-transmission, thus maintaining reliability despite using shared RF and baseband processing
Solution Approach 2:
The system implements a feedback mechanism where the server receives notifications about upcoming mode switches and can respond by adjusting data transmission strategies. The server can request re-transmission of data that might be lost during the mode switching period, creating a closed-loop feedback system that compensates for the reliability issues introduced by shared radio processing
2Adaptability or versatility
If the telematics device switches between communication and navigation modes frequently, then it can maintain both functionalities, but data losses occur during switching transitions
Solution Approach 1:
Before switching to navigation mode, the system sends a notification message to the server warning of the upcoming mode change. This allows the server to pause or buffer data transmissions that might be lost during the transition, and prepare re-transmission of any lost data after the navigation mode switch completes
Solution Approach 2:
The system maintains continuous operation by seamlessly switching between communication and navigation modes. The notification mechanism ensures that data transmission continuity is preserved at the system level, even though the radio physically switches modes, by coordinating with the server to resume and re-transmit data after the mode switch
3Measurement precision
If the radio operates in navigation mode to obtain accurate location data, then location precision is improved, but communication functionality is interrupted during the navigation mode operation
Solution Approach 1:
The system sends a notification to the server before entering navigation mode, allowing the server to prepare for communication interruption. The server can buffer outgoing communications and schedule them for re-transmission after the navigation mode operation completes, minimizing the effective communication loss time
Solution Approach 2:
The system uses periodic switching between communication and navigation modes rather than continuous operation in one mode. This allows the device to obtain location data periodically while maintaining communication capability for the majority of the time, balancing location precision needs with communication continuity
Data Source
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AI summary
Embodiments of the invention include a vehicle telematics system including telematics a telematics device, where the telematics device includes a modem that communicates using several communication modes, and the processor of the telematics device is directed to operate in the communication mode, transmit a notification to the cellular data server regarding a switch to a different communication mode, switch to the navigation mode and obtain location data for a first time, switch back to the communication mode, extrapolate a new location for a second time while in the communication mode based on an analysis of the location data received during the navigation mode.