System and method for determining mobile communication system carrier frequency propagation characteristics

• US 7,702,285 B2
• Filed: 08/16/2006
• Issued: 04/20/2010
• Est. Priority Date: 03/30/2001
• Status: Expired due to Fees

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Johnson, Derek, Jabbary, Ali, Austin, Mark D.
• Primary Examiner(s): Nguyen; Lee
• Application Number:
  US11/504,891
• Publication Number:
  US 20060276140A1
• Time in Patent Office: 1,343 Days
• Field of Search: 455/67.11, 455/67.16, 455/226.2, 455/423, 455/424
• US Class Current: 455/67.11
• CPC Class Codes: H04W 16/18 Network planning tools

Abstract

The present invention relates to systems for determining mobile communications system carrier propagation characteristics. In an embodiment, a system includes a frequency scanner, signal strength measurement device, digital verification color code logic, a location determining unit, and a memory. The frequency scanner can output a carrier signal corresponding to a carrier signal identifier, where the frequency scanner is located at a geographical location. The signal strength measurement device can be coupled to the frequency scanner and determine a carrier strength indicator of the carrier signal. The digital verification color code logic can be coupled to the frequency scanner and determine the digital verification color code of the carrier signal. The location determining unit can be coupled to the frequency scanner and determine a location identifier corresponding to the geographical location of the frequency scanner. The memory can be coupled to the frequency scanner and store the carrier signal identifier, the carrier strength indicator, the digital verification color code of the carrier signal, and the location identifier.

Claims

1. A method for determining mobile communications system carrier propagation characteristics, the method comprising:

receiving at a location a carrier signal from a transmitter of the mobile communications system, the mobile communications system operating in a standard operational mode, the carrier signal corresponding to a call handled by a cell without the cell keying up a test carrier frequency;

determining a strength indicator of the received carrier signal;

identifying the source of the received carrier signal; and

storing a carrier signal identifier corresponding to the received carrier signal, the signal strength indicator and a source identifier corresponding to the identified source of the received carrier signal, wherein the mobile communications system does not decrease system capacity during the operation of said method for determining mobile communications system carrier propagation characteristics;

wherein identifying the source of the received carrier includes decoding a Short Messaging Service (SMS) message transmitted on a control channel from the transmitter, the SMS message providing a unique identifying code identifying a cell generating the received carrier signal with the unique identifying code.

2. The method of claim 1, wherein the carrier signal includes the control channel.

3. The method of claim 1, wherein the carrier signal is a carrier signal carrying subscriber communications.

4. The method of claim 1, wherein the carrier signal in not a test carrier.

5. The method of claim 1, wherein operating a mobile communications system in a standard operational mode includes not transmitting a test carrier.

6. The method of claim 5, wherein the test carrier is a keyed-up carrier that does not carry subscriber communications.

7. The method of claim 1, wherein determining the source of the received carrier includes determining that the received carrier has a received signal strength that is at least approximately the same as a received carrier from a known source.

8. The method of claim 1, wherein determining the source of the received carrier includes determining that the received carrier has a received signal strength that is not at least approximately the same as a received carrier from a known source.

9. The method of claim 1, wherein determining the source of the received carrier includes determining the time delay of the received carrier.

10. The method of claim 1, further comprising determining carrier propagation characteristics of the received carrier signal based at least in part on one or more of the carrier signal identifier, the signal strength indicator and the source identifier.

11. A method for determining mobile communications system carrier propagation characteristics, the method comprising:

a step for receiving at a location a carrier signal from a transmitter of the mobile communications system, the mobile communications system operating in a standard operational mode, the carrier signal corresponding to a call handled by a cell without the cell keying up a test carrier frequency;

a step for determining a strength indicator of the received carrier signal;

a step for identifying the source of the received carrier signal; and

a step for storing a carrier signal identifier corresponding to the received carrier signal, the signal strength indicator, and a source identifier corresponding to the identified source of the received carrier signal, wherein the mobile communications system does not decrease system capacity during the operation of said method for determining mobile communications system carrier propagation characteristics;

wherein the step for identifying the source of the received carrier includes decoding a Short Messaging Service (SMS) message transmitted on a control channel from the transmitter, the SMS message providing a unique identifying code identifying a cell generating the received carrier signal with the unique identifying code.

12. The method of claim 11, wherein the carrier signal is not a test carrier.

13. The method of claim 11, wherein the carrier signal carries at least one of the control channel and a subscriber communications channel.

14. The method of claim 11, further comprising a step for determining carrier propagation characteristics of the received carrier signal based at least in part on one or more of the carrier signal identifier, the signal strength indicator and the source identifier.

15. A computer-readable medium storing a plurality of instructions adapted to be executed by a processor for determining mobile communications system carrier propagation characteristics, the plurality of instructions comprising instructions to:

receive at a location a carrier signal from a transmitter of the mobile communications system, the mobile communications system operating in a standard operational mode, the carrier signal corresponding to a call handled by a cell without the cell keying up a test carrier frequency;

determine a strength indicator of the received carrier signal;

identify the source of the received carrier signal; and

store a carrier signal identifier corresponding to the received carrier signal, the signal strength indicator and a source identifier corresponding to the identified source of the received carrier signal, wherein the mobile communications system does not decrease system capacity during the operation of said system for determining mobile communications system carrier propagation characteristics;

wherein identifying the source of the received carrier includes decoding a Short Messaging Service (SMS) message transmitted on a control channel from the transmitter, the SMS message providing a unique identifying code identifying a cell generating the received carrier signal with the unique identifying code.

16. The computer-readable medium of claim 15, wherein the carrier signal is not a test carrier.

17. The computer-readable medium of claim 15, wherein the plurality of instructions further comprise instructions to determine carrier propagation characteristics of the received carrier signal based at least in part on one or more of the carrier signal identifier, the signal strength indicator, and the source identifier.

18. A system for determining mobile communications system carrier propagation characteristics, the system comprising:

means for receiving at a location a carrier signal from a transmitter of the mobile communications system, the mobile communications system operating in a standard operational mode, the carrier signal corresponding to a call handled by a cell without the cell keying up a test carrier frequency;

means for determining a strength indicator of the received carrier signal;

means for identifying the source of the received carrier signal; and

means for storing a carrier signal identifier corresponding to the received carrier signal, the signal strength indicator, and a source identifier corresponding to the identified source of the received carrier signal, wherein the mobile communications system does not decrease system capacity during the operation of said system for determining mobile communications system carrier propagation characteristics;

wherein the means for identifying the source of the received carrier includes means for decoding a Short Messaging Service (SMS) message transmitted on a control channel from the transmitter, the SMS message providing a unique identifying code identifying a cell generating the received carrier signal with the unique identifying code.

19. The system of claim 18, wherein the carrier signal is not a test carrier.

20. The system of claim 18, further comprising means for determining carrier propagation characteristics of the received carrier signal based at least in part on one or more of the carrier signal identifier, the signal strength indicator, and the source identifier.