VOICE FALLBACK STRATEGY FOR VEHICLE ORIGINATED CELLULAR COMMUNICATION TO A CALL CENTER
First Claim
1. A connection method for use by a vehicle telematics unit to establish a wireless telephone connection between the telematics unit and a call center, comprising the steps of:
- (a) attempting origination of a voice channel cellular connection between the telematics unit and call center using one or more connection methods;
(b) establishing a modem data connection between the telematics unit and call center if the origination is successful; and
(c) if the origination is unsuccessful, then attempting origination of a voice channel cellular connection for communication of speech between the telematics unit and call center using a base station to which the telematics unit has previously successfully attached.
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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. The system and method can be carried out in connection with various cellular system technologies, but is especially suited for use with GSM systems.
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Citations
8 Claims
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1. A connection method for use by a vehicle telematics unit to establish a wireless telephone connection between the telematics unit and a call center, comprising the steps of:
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(a) attempting origination of a voice channel cellular connection between the telematics unit and call center using one or more connection methods; (b) establishing a modem data connection between the telematics unit and call center if the origination is successful; and (c) if the origination is unsuccessful, then attempting origination of a voice channel cellular connection for communication of speech between the telematics unit and call center using a base station to which the telematics unit has previously successfully attached. - View Dependent Claims (2, 3, 4, 5)
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6. A connection method for use by a vehicle telematics unit to establish a wireless telephone connection between the telematics unit and a call center, comprising the steps of:
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receiving an input at a telematics unit in a vehicle, the input being associated with a desired wireless communication of speech or data from the vehicle to a call center; if the desired wireless communication is of data, then carrying out a call connection strategy involving a plurality of different connection methods, each of which includes the steps of attempting origination of a voice channel cellular connection via an attached base station and, once an originated voice channel cellular connection is made, establishing a modem data connection between the telematics unit and call center over the originated connection; and if the desired wireless communication is of speech, then attempting origination of a voice channel cellular connection for communication of speech between the telematics unit and call center without using the primary, secondary, or tertiary connection attempts. - View Dependent Claims (7, 8)
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Specification