System and method for monitoring and reporting telematics unit communication network system acquisition and scanning performance

• US 8,335,508 B2
• Filed: 08/07/2008
• Issued: 12/18/2012
• Est. Priority Date: 08/07/2008
• Status: Active Grant

• Current Assignee: General Motors LLC (General Motors Company)
• Original Assignee: General Motors LLC (General Motors Company)
• Inventors: Doherty, James, Krause, Kevin R., Yi, Ki Hak, Kassam, Ayaz S.
• Primary Examiner(s): RAMPURIA, SHARAD K
• Application Number:
  US12/188,128
• Publication Number:
  US 20100035602A1
• Time in Patent Office: 1,594 Days
• Field of Search: 455/420, 455/456.1, 455/557, 4554221-4353, 455 6711- 6716, 455/569.1, 455/569.2, 455/575.9
• US Class Current: 455/434
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 8/24 Transfer of terminal data

Abstract

A system and method for monitoring and reporting telematics unit communication network system acquisition and scanning performance is disclosed herein. An example of the method includes monitoring a scan of all cellular networks that are available to a vehicle telematics unit, and during the monitoring, recognizing a predetermined trigger. In response to the predetermined trigger, a memory buffer in the telematics unit stores data associated with at least one of performance or outcome of the scan. At least some of the stored data is transmitted from the telematics unit to a server in selective communication with the telematics unit.

Claims

1. A method for monitoring and reporting communication network system acquisition and scanning performance, comprising:

scanning all communication networks that are available to a vehicle telematics unit whether or not the telematics unit utilizes the communication network;

monitoring the scan for service or protocol related changes;

during the monitoring, recognizing a predetermined trigger, the predetermined trigger being selected from a change in a cellular system identification number, a loss of a cellular signal, a state of no cellular service, a power transition change, an ignition cycle, entering DRx mode, exiting DRx mode, a background scan on a predetermined network based on a cellular system identification number, a network change, a new network parameter, a change in a network parameter, a pilot channel change, a call failure, and combinations thereof;

in response to the predetermined trigger, storing, to a memory buffer in the telematics unit, data associated with at least one of performance or outcome of the scan, the data is selected from a cellular system identification number at a beginning and an end of the scan, a timestamp at a beginning and an end of the scan, a GPS location at a beginning and an end of the scan, a received signal strength at a beginning and an end of the scan, a frame error rate at a beginning and an end of the scan, a pilot strength to interference ratio at a beginning and an end of the scan, a power level at a beginning and an end of the scan, a loss of service, a time at which a network access device is unavailable, a protocol version revision, information related to a registration period, a type of scan, and combinations thereof; and

transmitting at least some of the stored data from the telematics unit to a server in selective communication with the telematics unit.

2. The method as defined in claim 1 wherein prior to transmitting the stored data, the method further comprises querying the telematics unit for the at least some of the stored data, and wherein transmitting is accomplished in response to the querying.

3. The method as defined in claim 1 wherein transmitting is accomplished via an automatic upload mechanism which transmits the at least some of the stored data in response to an upload event.

4. The method as defined in claim 3 wherein the upload event is selected from a user request, a timestamp, a vehicle location, exceeding a threshold level of the memory buffer, or combinations thereof.

5. The method as defined in claim 3 wherein the upload event is a criteria based upload event such that the transmitting occurs if a predetermined criteria is met.

6. The method as defined in claim 5 wherein the predetermined criteria is selected from:

a time to acquire a network is greater than a predetermined time, a signal is lost for more than a predetermined time, an acquired network changes a predetermined number of times in a predetermined time frame, if a predetermined parameter is recognized, and combinations thereof.

7. The method as defined in claim 1, further comprising analyzing the at least some of the stored data.

8. The method as defined in claim 7, further comprising refining an existing communication network system acquisition algorithm of the telematics unit, an existing scanning algorithm of the telematics unit, or combinations thereof in response to the analysis.

9. The method as defined in claim 7, further comprising creating a new communication network system acquisition algorithm for the telematics unit, a new scanning algorithm for the telematics unit, or combinations thereof in response to the analysis.

10. The method as defined in claim 7, further comprising improving availability of the telematics unit on a cellular network associated therewith in response to the analysis.

11. The method as defined in claim 7, further comprising identifying at least one problem associated with a cellular network used by the telematics unit in response to the analysis.

12. The method as defined in claim 7, further comprising mapping a cellular boundary in response to the analysis.

13. A system for monitoring and reporting communication network system acquisition performance, comprising:

a telematics unit configured to monitor a scan of all available communication networks whether or not the telematics unit utilizes the communication network and recognize a predetermined trigger during the monitoring, the predetermined trigger being indicative of a service or protocol related change, and the predetermined trigger being selected from a change in a cellular system identification number, a loss of a cellular signal, a state of no cellular service, a power transition change, an ignition cycle, entering DRx mode, exiting DRx mode, a background scan on a predetermined network based on a cellular system identification number, a network change, a new network parameter, a change in a network parameter, a pilot channel change, a call failure, and combinations thereof;

a memory buffer operatively connected to the telematics unit, the memory buffer configured to store data associated with at least one of performance or outcome of the scan in response to a signal received by the telematics unit after recognition of the predetermined trigger, the data being selected from a cellular system identification number at a beginning and an end of the scan, a timestamp at a beginning and an end of the scan, a GPS location at a beginning and an end of the scan, a received signal strength at a beginning and an end of the scan, a frame error rate at a beginning and an end of the scan, a pilot strength to interference ratio at a beginning and an end of the scan, a power level at a beginning and an end of the scan, a loss of service, a time at which a network access device is unavailable, a protocol version revision, information related to a registration period, a type of scan, and combinations thereof; and

a server in selective communication with the telematics unit and configured to receive at least some of the stored data from the telematics unit.

14. The system as defined in claim 13, further comprising a telematics unit manufacturer, a telematics service provider, or a cellular service provider configured to analyze the received data.

15. The system as defined in claim 13, further comprising a call center configured to query the telematics unit for the at least some of the stored data.

16. The system as defined in claim 13 wherein the telematics unit includes an automatic upload mechanism configured to transmit the at least some of the stored data in response to an upload event.

17. The system as defined in claim 16 wherein the upload event is selected from a user request, a timestamp, a vehicle location, exceeding a threshold level of the memory buffer, a criteria based upload event such that the at least some of the data is received if a predetermined criteria is met, or combinations thereof.

18. The system as defined in claim 17 wherein the predetermined criteria is selected from:

a time to acquire a network is greater than a predetermined time, a signal is lost for more than a predetermined time, an acquired network changes a predetermined number of times in a predetermined time frame, if a predetermined parameter is recognized, and combinations thereof.

19. A method for monitoring and reporting communication network system acquisition and scanning performance, comprising:

scanning multiple cellular networks that are available to a vehicle telematics unit whether or not the telematics unit utilizes the communication network;

recording scanning results in response to a predetermined trigger, the scanning results including at least a first result relating to a first network of the multiple networks and a second result relating to a second network of the multiple networks, and the predetermined trigger being selected from a change in a cellular system identification number, a loss of a cellular signal, a state of no cellular service, a power transition change, an ignition cycle, entering DRx mode, exiting DRx mode, a background scan on a predetermined network based on a cellular system identification number, a network change, a new network parameter, a change in a network parameter, a pilot channel change, a call failure, and combinations thereof;

in response to the scanning, creating a connection over the first network; and

reporting the second result by transmitting at least some data stored during the scanning from the telematics unit to a remote location in selective communication with the telematics unit, the data being selected from a cellular system identification number at a beginning and an end of the scan, a timestamp at a beginning and an end of the scan, a GPS location at a beginning and an end of the scan, a received signal strength at a beginning and an end of the scan, a frame error rate at a beginning and an end of the scan, a pilot strength to interference ratio at a beginning and an end of the scan, a power level at a beginning and an end of the scan, a loss of service, a time at which a network access device is unavailable, a protocol version revision, information related to a registration period, a type of scan, and combinations thereof.

20. The method of claim 19 wherein the reporting of the second result occurs during the connection over the first network.