Controlling vehicle telematics unit selection of radio access technology

A technology of telematics and radio access, applied in wireless communication, electrical components, communication supplementary services, etc., can solve the problem that the vehicle telematics unit is difficult to stop using

Inactive Publication Date: 2017-08-25
GENERAL MOTORS COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, once a vehicle telematics unit has selected an older technology RAT, it may be difficult for the vehicle telematics unit to stop using that RAT and re-establish communication using a newer technology RAT

Method used

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  • Controlling vehicle telematics unit selection of radio access technology
  • Controlling vehicle telematics unit selection of radio access technology

Examples

Experimental program
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Embodiment Construction

[0008] The systems and methods described below control the selection of a radio access technology (RAT) by a vehicle telematics unit in an environment where the wireless carrier system may not support a RAT that provides simultaneous voice and data (SVD). In these environments, the vehicle telematics unit may choose from multiple RATs, some of which provide faster data communication speeds than others. When two or more RATs are considered, a RAT that provides a faster data communication speed relative to the other RAT is considered a state-of-the-art RAT, while a slower RAT may be referred to as an older technology RAT.

[0009] In some areas, wireless carrier systems may support data services via state-of-the-art RATs that typically support SVD simultaneous communication in the same RAT but may not support voice calls in addition to traditionally supporting SVD. For example, a wireless carrier system may only provide data services via a 4G LTE RAT, but may not support a voice...

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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.

Description

technical field [0001] The present invention relates to cellular communications, and more particularly to selecting one radio access technology (RAT) with respect to another RAT. Background technique [0002] Vehicles are typically equipped with a vehicle telematics unit that facilitates communication between the vehicle and a central facility that provides telematics services to the vehicle. These telematics services can include vehicle diagnostic assistance, route planning navigation guidance, emergency assistance or other assistance provided by the central facility. Communications enabling these services are typically carried over a wireless carrier system operating using one or more cellular protocols or radio access technologies (RATs). Depending on the RAT selected by the vehicle telematics unit, the time to deliver the telematics service may vary significantly. However, sometimes the vehicle telematics unit selects a RAT not based on the best preference for providin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04W4/16H04W36/00H04W68/02
CPCH04L67/025H04L67/12H04W4/16H04W36/0011H04W68/02H04L67/60H04W36/0022
Inventor B·陈
Owner GENERAL MOTORS COMPANY
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