SMS AND PACKET DATA PERFORMANCE MONITORING

• US 20090164551A1
• Filed: 12/21/2007
• Published: 06/25/2009
• Est. Priority Date: 12/21/2007
• Status: Active Grant

• Current Assignee: General Motors LLC (General Motors Company)
• Original Assignee: General Motors Corporation (General Motors Company)
• Inventors: Oesterling, Christopher L., Heines, Richard F., Chang, Sam S.
• Granted Patent: US 7,953,528 B2
• Time in Patent Office: Days
• US Class Current: 709/202
• CPC Class Codes: G01S 5/0027 of actual mobile position, i.e. position determined on mobile
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements

Abstract

A system and method for monitoring data transfer performance between a central facility and a vehicle that includes calculating the message latency between the transmission and receipt of a message from a call center to the vehicle, or vice-versa. The information can be used to generate a latency map that is useful in diagnosing wireless system problems and in deciding when and how to communicate with a vehicle depending upon its location.

Claims

1. A method for monitoring data transfer performance, comprising the steps of:

(a) receiving a message at a vehicle;

(b) determining a receipt time indicating when the message was received at the vehicle; and

(c) sending latency information to a central facility, the latency information being indicative of a message latency representing the difference between the receipt time and when the message was sent to the vehicle.

2. The method of claim 1, wherein step (a) further comprises receiving an initiation time as a part of the message, wherein the initiation time indicates when the message was sent.

3. The method of claim 2, wherein step (c) further comprises determining the message latency using the initiation time and the receipt time, and then sending the message latency from the vehicle to a central facility.

4. The method of claim 2, wherein step (c) further comprises sending the initiation time and receipt time to a central facility for calculation of the message latency at the central facility.

5. The method of claim 1, wherein step (c) further comprises sending the receipt time to a central facility for calculation of the message latency at the central facility.

6. The method of claim 1, further comprising the steps of:

determining the location of the vehicle at the time the message is received;

sending the location of the vehicle along with the latency information.

7. The method of claim 6, further comprising the steps of:

obtaining the latency information and locations for a plurality of vehicles;

calculating the message latencies for the plurality of vehicles;

associating the message latencies with the locations for at least some of the vehicles;

analyzing the message latencies and associated locations; and

determining geographical areas in which longer message latencies occur relative to other geographical areas.

8. The method of claim 6, wherein the message received at the vehicle requests that a telematics unit initiate a data packet session between the telematics unit and a central facility and the step of sending the location of the vehicle involves using the data packet session to send the location.

9. The method of claim 1, wherein step (c) further comprises initiating a communication from the vehicle to a central facility and sending the latency information as part of a return message sent via the communication, and wherein the method further comprises the steps of:

determining the location of the vehicle; and

determining a return message latency indicative of the difference in time between when the communication was initiated and when the return message was received at the central facility; and

providing information back to the vehicle indicative of the return message latency.

10. The method of claim 1, wherein step (a) further involves receiving an SMS message, wherein the message latency comprises an SMS latency.

16. The method of claim 10, wherein step (f) is carried out using one or more initiation times and locations for a particular vehicle or is carried out using initiation times and locations for a plurality of vehicles.

11. A method for monitoring data transfer performance, comprising the steps of:

(a) wirelessly initiating a communication from each of a plurality of vehicles to a central facility;

(b) recording the initiation time at which each communication was initiated;

(c) recording the location of the vehicle at the time the communication was initiated;

(d) sending the initiation time and location to the central facility;

(e) determining a message latency indicative of the difference in time between when the communication was initiated and when the initiation time and location was received at the central facility; and

(f) generating a latency map that associates message latencies with location using the initiation time and locations received from one or more of the vehicles.

12. The method of claim 11, wherein step (f) further comprises the steps of:

creating a database that organizes data for different geographical areas;

categorizing the message latency for each vehicle located in the different geographical areas; and

determining which geographical areas having larger message latencies.

13. The method of claim 11, further comprising the steps of:

wirelessly receiving a return message at the plurality of vehicles from the central facility in response to the communication;

establishing the time at which the return message was received at each vehicle; and

calculating the amount of time elapsed between initiation of the communication and receipt of the return message.

14. The method of claim 13, wherein the communication and return messages are SMS messages.

15. The method of claim 13, wherein the communication and return messages are sent over at least one packet data session.

17. A method for monitoring data transfer performance, comprising the steps of:

(a) encoding a message requesting data from a vehicle with an initial time;

(b) sending the message from a central facility to a telematics unit;

(c) receiving the message at the telematics unit;

(d) recording the time at which the message is received at the telematics unit from the central facility;

(e) calculating a time delta between the initial time and the time at which the message is received at the telematics unit;

(f) determining the location of the vehicle at the time the message is received at the telematics unit;

(g) initiating a data session between the telematics unit and the central facility; and

(h) exchanging the requested data, time delta, and vehicle location between the telematics unit and the central facility.

18. The method of claim 17, further comprising the steps of:

creating a database containing different geographical areas; and

categorizing in the database the calculated time delta for each vehicle according to location in each geographical area; and

determining geographical areas having large time deltas.

19. The method of claim 18, further comprising the step of sending the calculated time delta for each vehicle located in each particular geographical area to a wireless carrier provider.

20. The method of claim 17, wherein the step of calculating a time delta can take place either at the vehicle or at a central facility.