Telematics Unit Voice Data Channel Switching
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Solution Overview
Problem
In emergency situations, existing telematics systems require PSAP personnel to wait for data transmission during a three-way call, disrupting voice communication and delaying service.
Innovation Solution
A method that allows vehicle data to be obtained during a multi-way call by switching the telematics unit from a voice call to a data call without ending the voice connection, enabling simultaneous voice communication between the call center and PSAP while uploading data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the advisor switches the call to a data modem to obtain vehicle data during a three-way call, then vehicle data can be accessed, but the advisor cannot communicate over the three-way call and PSAP personnel must wait for data transmission
Solution Approach 1:
The patent segments the communication channel into separate voice and data channels. The voice call between the vehicle, call center, and PSAP continues uninterrupted on the voice channel, while data transmission occurs separately on the data channel. This allows vehicle data to be obtained without interrupting or delaying PSAP personnel's ability to communicate with the vehicle occupant.
Solution Approach 2:
The patent introduces a data modem as an intermediary component that handles data transmission separately from the voice communication path. The modem acts as a mediator that can transmit vehicle data asynchronously without affecting the real-time voice interaction between PSAP personnel and the vehicle occupant, eliminating the need to pause communication for data retrieval.
2Loss of information
If data transmission is conducted over the three-way call using modem signalling, then vehicle data can be obtained, but modem signalling is audible to PSAP personnel and disrupts the call
Solution Approach 1:
The patent separates data transmission from the voice call by establishing independent data and voice channels. Data is transmitted through a data modem on a separate channel from the voice communication, so modem signalling sounds are isolated from the PSAP personnel's audio experience. This segmentation eliminates audible interference while maintaining data transmission capability.
3Loss of information
If the advisor waits for data transmission to complete before continuing communication, then complete vehicle data is obtained, but emergency response time is delayed
Solution Approach 1:
The patent enables continuous useful action by allowing voice communication to proceed uninterrupted while data transmission occurs in parallel. PSAP personnel can immediately begin assessing the emergency situation and communicating with the vehicle occupant without waiting for data transmission to complete. The data is retrieved asynchronously in the background, maintaining continuous emergency response activities without idle waiting periods.
Data Source
AI summary
A system and method for obtaining data during a multi-way call involving at least a vehicle telematics unit, call center, and third party such as a public safety answering point (PSAP). While connected together in at least a three-way voice call, the connection from the telematics unit is switched out of the call and connected to a data modem to receive vehicle data uploaded from the telematics unit. This can be used to provide vehicle location and other vehicle information such as current vehicle conditions and operational state. Thereafter, the telematics unit connection is switched back into the multi-way call to permit continued voice communications between the parties. The uploaded vehicle data can then be used by the call center or PSAP to provide emergency or other assistance.