CONTROLLING VEHICLE TELEMATICS UNIT SELECTION OF RADIO ACCESS TECHNOLOGY
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United States of America Patent
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Issued Date -
Aug 17, 2017
app pub date -
Feb 17, 2016
filing date -
Feb 17, 2016
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Abstract
A system and method of controlling the Radio Access Technology selected by a vehicle telematics unit includes receiving a request to initiate a voice call from a vehicle occupant at the vehicle telematics unit; ending any existing data connection that is using a latest-technology RAT to communicate with a cell tower, wherein simultaneous voice and data (SVD) communications are not possible using the latest-technology RAT; ending the data connection with the cell tower using a latest-technology RAT; establishing the voice call via a cell tower using an older-technology RAT; detecting the end of the voice call; commanding the vehicle telematics unit to end use of the older-technology RAT in response; and establishing data communications with a cell tower via the latest-technology RAT.
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