PRIMARY CONNECTION 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) verifying that the vehicle telematics unit is in communication with an attached base station;
(b) attempting to originate a connection with the call center using the attached base station; and
(c) if the origination attempt fails, then the method further comprises the steps of;
(c1) identifying a neighboring base station using a base station list received from the attached base station;
(c2) attempting to attach to the identified base station and, if successful, attempting to originate the connection with the call center over the identified base station; and
(c3) iteratively repeating steps (c1) and (c2) until either a successful origination occurs or steps (c1) and (c2) have been carried out for each neighboring base station on the base station list.
10 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. The system and method can be carried out in connection with various cellular system technologies, but is especially suited for use with GSM systems.
23 Citations
11 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) verifying that the vehicle telematics unit is in communication with an attached base station; (b) attempting to originate a connection with the call center using the attached base station; and (c) if the origination attempt fails, then the method further comprises the steps of; (c1) identifying a neighboring base station using a base station list received from the attached base station; (c2) attempting to attach to the identified base station and, if successful, attempting to originate the connection with the call center over the identified base station; and (c3) iteratively repeating steps (c1) and (c2) until either a successful origination occurs or steps (c1) and (c2) have been carried out for each neighboring base station on the base station list. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A connection method for use by a vehicle telematics unit to establish a wireless telephone connection between the telematics unit and a call center over a GSM cellular system, comprising the steps of:
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(a) determining if the telematics unit is currently attached to a base station of a registered PLMN and, if not, executing an idle mode process involving cell reselection and attempting to attach to a base station following cell reselection; (b) attempting origination of an in-band modem cellular call if the telematics unit is attached to a base station; and (c) if the origination attempt fails, then carrying out steps (a) and (b) for one or more neighboring base stations using a BCCH Allocation list.
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Specification