Cellular communications drive test system and method

• US 7,353,019 B2
• Filed: 11/28/2005
• Issued: 04/01/2008
• Est. Priority Date: 06/28/2000
• Status: Expired due to Term

• Current Assignee: Buffalo Patents, LLC
• Original Assignee: Jasper Wireless LLC (Intellectual Ventures LLC)
• Inventors: Martin, Dannie E.
• Primary Examiner(s): Nguyen; Lee
• Application Number:
  US11/287,232
• Publication Number:
  US 20060079222A1
• Time in Patent Office: 855 Days
• Field of Search: 455/67.7, 455/67.11, 455/423, 455/424, 370/241, 370/244, 370/250, 375/213
• US Class Current: 455/424
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic

Abstract

A system for and method of cellular telephone system monitoring includes a cellular switch which is remotely accessed and placed in a call monitor mode. A GPS receiver is connected to a mobile telephone via an interface unit. Call performance information (e.g., signal strength, BER and call events) are recorded at the switch and downloaded to a remote computer that includes a display. GPS location information is transmitted by the mobile telephone and received by the remote computer via the switch. The computer receives and stores the recorded call and GPS information and graphically displays this information, along with a map indicating the location of the mobile telephone. Preferably, the call information is first parsed, converted and/or scaled to conform to a standard file format.

Claims

1. A method of monitoring the performance of a cellular telephone call, comprising the steps of:

(a) calling a first mobile telephone that is configured to be in an auto-answer mode;

(b) receiving GPS location information indicative of the location of the first mobile telephone;

(c) recording data on a first computer, the data comprising telephone call parameter information available from the first mobile telephone and the GPS location information;

(d) calling a second mobile telephone that is in communication with the first computer;

(e) transmitting via the second mobile telephone the data recorded on the first computer;

(f) configuring a cellular telephone system switch to be in a call monitor mode and recording cellular system information with respect to the first mobile telephone;

(g) forwarding the data and cellular system information with respect to the first mobile telephone to a second computer; and

(h) graphically displaying the data and cellular system information with respect to the first mobile telephone.

2. The method of claim 1, further comprising graphically identifying when a call event has occurred.

3. The method of claim 1, wherein the second mobile telephone is configured to be in an auto-answer mode.

4. The method of claim 1, wherein the second mobile telephone has an antenna mounted on the exterior of a vehicle.

5. The method of claim 1, further comprising at least one of the steps of parsing, converting and scaling the cellular system information.

6. The method of claim 1, further comprising the step of plotting a graph of at least one of signal strength and bit error rate.

7. The method of claim 1, further comprising the step of indicating the signal strength at cell sites other than a serving cell site.

8. The method of claim 1, further comprising the step of audibly indicating that a call event has occurred.

9. The method of claim 1, further comprising the step of continually graphically displaying the data and cellular system information after new such data or information is received.

10. The method of claim 1, further comprising mounting or installing, respectively, a plurality of at least the first mobile telephones in a plurality of service vehicles, and monitoring any one of the first mobile telephones.

11. An apparatus for monitoring call performance in a mobile telephone system, comprising:

a computer, including a display, the computer being operable to;

remotely access a switch;

place the switch in a call monitor mode;

receive and store mobile telephone system information and location information

associated with a mobile telephone unit being used in a call being monitored, the mobile telephone system information and location information associated with the mobile telephone unit are to be stored using a standard file format, the standard file format of system and location information further comprising;

a channel carrying the call;

a channel type;

new call information;

normal end call events;

dropped end call events; and

timestamp entries for the location information; and

graphically display the system information and location information, the display further includes information associated with a serving cell site and at least one neighboring cell site, and at least one indication of received signal quality at both the serving cell site and the at least one neighboring cell site.

12. The apparatus according to claim 11, wherein the at least one indication of received signal quality comprises at least one quantity selected from the group consisting of:

an indication of received signal strength and an indication of a bit error rate.

13. The apparatus according to claim 11, wherein said display includes a map indicating the serving cell site and the at least one neighboring cell site, as well as a location of the mobile telephone unit.

14. The apparatus according to claim 11, wherein the standard file format includes an identification number associated with the mobile telephone unit.

15. An apparatus for monitoring call performance in a mobile telephone system, comprising:

a computer, including a display, the computer being operable to;

remotely access a switch;

place the switch in a call monitor mode;

receive and store mobile telephone system information and location information associated with a mobile telephone unit being used in a call being monitored in a standard file format, the standard file format of system and location information further comprising;

a channel carrying the call;

a channel type;

new call information;

normal end call events;

dropped end call events; and

timestamp entries for the location information; and

graphically display the system information and location information, the display further includes information associated with a serving cell site and at least one neighboring cell site, and at least one indication of received signal quality at the serving cell site and the at least one neighboring cell site, and the at least one indication of received signal quality includes color coding to indicate received signal quality.

16. A test apparatus for a mobile telephone system, comprising:

a first mobile telephone unit having an automatic answer mode;

an RF location unit substantially collocated with the first mobile telephone unit; and

an interface unit substantially collocated with and coupled to the first mobile telephone unit and the RF location unit to obtain location and time information from the RF location unit and to provide the location and time information to be transmitted, along with call information, to a monitoring facility, via a mobile telephone unit.

17. The test apparatus of claim 16, further comprising:

an auxiliary system coupled to the interface unit to obtain call information and location and time information from the interface unit.

18. The test apparatus of claim 17, wherein the auxiliary system comprises:

a second mobile telephone unit, having an automatic answering mode, to transmit the call information and the location and time information to the monitoring facility.

19. The test apparatus of claim 18, the auxiliary system further comprising:

a computer coupled to store said call information and said location and time information, the computer to be coupled to the second mobile telephone unit to enable transmission of stored call information and location and time information to the monitoring facility.

20. The test apparatus of claim 16, wherein the call information includes at least one quantity selected from the group consisting of:

an indication of received signal strength and an indication of a bit error rate.

21. The test apparatus of claim 16, further comprising:

a vehicle on which said first mobile telephone unit, said RF location system, and said interface unit are to be mounted.