Packet data origination for vehicle communication with a call center
First Claim
1. A packet data origination method for use by a vehicle telematics unit to provide a wireless data communication from the telematics unit to a call center, comprising the steps of:
- (a) determining if there is an existing packet data protocol (PDP) context for the telematics unit;
(b) determining, when an existing PDP context is found, whether there is an existing packet data connection is available between the telematics unit and call center and, if so, using the existing packet data connection to transmit the data, and if not, then attempting to establishing a new packet data connection between the telematics unit and call center as part of carrying out a nested iterative process to obtain a new PDP context;
(c) obtaining a packet data connection to the call center via either the existing PDP context or the new PDP context; and
(d) transmitting data over the packet data connection from the telematics unit to 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.
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Citations
11 Claims
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1. A packet data origination method for use by a vehicle telematics unit to provide a wireless data communication from the telematics unit to a call center, comprising the steps of:
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(a) determining if there is an existing packet data protocol (PDP) context for the telematics unit; (b) determining, when an existing PDP context is found, whether there is an existing packet data connection is available between the telematics unit and call center and, if so, using the existing packet data connection to transmit the data, and if not, then attempting to establishing a new packet data connection between the telematics unit and call center as part of carrying out a nested iterative process to obtain a new PDP context; (c) obtaining a packet data connection to the call center via either the existing PDP context or the new PDP context; and (d) transmitting data over the packet data connection from the telematics unit to the call center. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A packet data origination method for use by a vehicle telematics unit to provide a wireless data communication over a GPRS network from the telematics unit to a call center, comprising the steps of:
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(a) determining if there is an existing packet data protocol (PDP) context for the telematics unit; (b) carrying out a GPRS attach procedure, connection management procedure, and a PDP context activation procedure for a packet data connection between the telematics unit and call center if no existing PDP context is found in step (a), wherein the connection management procedure includes the step of receiving packet data channel assignments, and the PDP context activation procedure includes the steps of confirming that a new PDP context exists, determining that a packet uplink assignment has been received by the telematics unit, and sending a packet control acknowledgement over an assigned packet associated control channel; (c) obtaining the packet data connection to the call center via either the existing PDP context or the new PDP context; and (d) transmitting data over the packet data connection from the telematics unit to the call center.
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Specification