VOICE FALLBACK ORIGINATION FOR VEHICLE CELLULAR COMMUNICATION WITH A CALL CENTER
First Claim
1. A cellular voice channel origination method for use by a vehicle telematics unit to establish a voice call between the telematics unit and a call center, comprising the steps of:
- (a) attempting a radio resource connection from the telematics unit to a wireless cellular system;
(b) initiating a mobile originated call to a call center via the wireless cellular system;
(c) monitoring at the telematics unit for receipt of a connect message;
(d) sending a connect acknowledgement message in response to receipt of the connect message and receiving a return acknowledgement, thereby establishing the voice call between the telematics unit and call center; and
(e) connecting the call to an advisor at the call center.
8 Assignments
0 Petitions
Accused Products
Abstract
A system and method for making vehicle originated calls to a telematics service provider or other call center. The method includes identifying a call type associated with a desired wireless communication of speech or data to the call center, and then carrying out one of a number of different call connection processes depending on the call type. For voice channel cellular connections, an in-band modem cellular connection is preferably established in most instances using a connection retry strategy that includes primary, secondary, and possibly tertiary connection attempts each of which utilize at least one of a number of different voice and data call origination processes. The system and method can be carried out in connection with various cellular system technologies, but is especially suited for use with GSM systems.
21 Citations
14 Claims
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1. A cellular voice channel origination method for use by a vehicle telematics unit to establish a voice call between the telematics unit and a call center, comprising the steps of:
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(a) attempting a radio resource connection from the telematics unit to a wireless cellular system; (b) initiating a mobile originated call to a call center via the wireless cellular system; (c) monitoring at the telematics unit for receipt of a connect message; (d) sending a connect acknowledgement message in response to receipt of the connect message and receiving a return acknowledgement, thereby establishing the voice call between the telematics unit and call center; and (e) connecting the call to an advisor at the call center. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A cellular voice channel origination method for use by a vehicle telematics unit to provide a wireless communication from the telematics unit to a call center, comprising the steps of:
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(a) initializing a counter; (b) starting a connection timer; (c) attempting a radio resource connection from the telematics unit to a wireless cellular system; (d) sending a service request via a standalone dedicated control channel of the wireless cellular system; (e) initiating a mobile originated call to a call center via the wireless cellular system; (f) monitoring at the telematics unit for receipt of a connect message over a fast associated control channel of the wireless cellular system; (g) incrementing the counter if the connect message is not received before expiration of the timer and then repeating steps (b) through (f) after incrementing the counter; (h) sending a connect acknowledgement message in response to receipt of the connect message and receiving a return acknowledgement, thereby establishing the voice call between the telematics unit and call center; and (i) repeating at least steps (b) through (f) until the voice call is successfully established or the counter reaches a specified maximum limit. - View Dependent Claims (11, 12, 13, 14)
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Specification