Systems and methods for tracking signal strength in wireless networks

• US 7,826,837 B1
• Filed: 08/05/2005
• Issued: 11/02/2010
• Est. Priority Date: 08/05/2005
• Status: Expired due to Fees

• Current Assignee: Verizon Patent and Licensing Incorporated (Verizon Communications Inc.)
• Original Assignee: Verizon Services Corporation (Verizon Communications Inc.)
• Inventors: Sylvester, James E.
• Primary Examiner(s): Nguyen; Tu X
• Application Number:
  US11/198,548
• Time in Patent Office: 1,915 Days
• Field of Search: 455/69, 455/522, 455/404.2, 455/405, 455/407, 455/414.2, 455/422.1, 455/432.1, 455/67.14, 455/67.11, 455/115.3
• US Class Current: 455/423
• CPC Class Codes: H04W 24/06 Testing, supervising or monitoring using simulated traffic
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports

Abstract

Tracking of signal strength in wireless networks is disclosed. In one of many possible embodiments, signal strength of a wireless signal received by at least one wireless device is measured, the wireless device being configured for operation in the wireless network. A parameter of the wireless device is determined, the parameter corresponding with the measurement of signal strength. The measured signal strength and the determined parameter are transmitted to a network operations center. The measured signal strength and the determined parameter are used to analyze signal coverage of the wireless network.

Claims

1. A wireless device comprising:

a radio-frequency (RF) subsystem configured to transmit and receive RF signals over a wireless network; and

a processing and control subsystem coupled to the RF subsystem and configured to

receive a schedule from the wireless network, wherein the received schedule initiates a ping over the wireless network;

obtain a measurement of signal strength of a wireless signal received by the RF subsystem, wherein obtaining the measurement is performed based on the ping initiated by the received schedule;

determine a current approximate location of the wireless device;

determine an approximate time at which the measurement of signal strength is obtained; and

cause the RF subsystem to transmit signals representative of the measured signal strength, the location, the time, and a device identifier to a network operations center over the wireless network.

2. The wireless device of claim 1, wherein transmitting includes sending said signals representative of the measured signal strength, the location, the time, and the device identifier over either at least one upstream control channel or at least one out-of-band channel of the wireless network.

3. The wireless device of claim 1, wherein said signals representative of the measured signal strength and the at least one determined parameter are transmitted out-of-band by using at least one short message service (“

SMS”

) channel.

4. The wireless device of claim 1, further comprising:

a location determination subsystem coupled to the processing and control subsystem and configured to determine location data indicating a location of the wireless device;

wherein the processing and control subsystem is further configured to instruct the location determination subsystem to obtain location data, receive the location data from the location determination subsystem, and use the location data in determining the current approximate location of the wireless device.

5. The wireless device of claim 4, wherein the location determination subsystem comprises a GPS system.

6. The wireless device of claim 1, wherein the device identifier includes at least one characteristic of the wireless device, including a make, a model, and an operating mode.

7. The wireless device of claim 1, wherein the processing and control subsystem is further configured to determine the current approximate location of the wireless device by first attempting to gather GPS data, and when GPS data is unavailable, then determining the approximate location using a cellular-based trilateration technique.

8. The wireless device of claim 1, wherein the processing and control subsystem is further configured to cause the RF subsystem to transmit signals representative of the measured signal strength, the location, the time, and the device identifier to the network operations center at approximately the same time that the signal strength is measured.

9. The system of claim 1, wherein the ping is transmitted to the wireless device over at least one control channel.

10. The system of claim 1, wherein the ping is initiated by the network operations center.

11. The system of claim 1, wherein the ping is initiated based on a predefined event.

12. A method comprising:

selecting a plurality of wireless devices;

sending a command over a wireless network to the plurality of wireless devices, wherein the command includes a schedule for initiating a ping over the wireless network;

each of the plurality of wireless devices performing the following in response to receiving the ping initiated by the predefined schedule;

measuring a signal strength of downstream wireless signals,

determining a current approximate location of the wireless device,

determining an approximate time at which the measurement of signal strength is obtained, and

sending a signal including the measured signal strength, the location, the time, and a device identifier to a network operations center over the wireless network; and

performing an analysis based on the received data.

13. The method of claim 12, wherein the analysis includes mapping the measured signal strength to at least a section of a geographic area covered by the wireless network.

14. The method of claim 13, wherein the analysis further includes mapping the measured signal strength based on both the identified location and the approximate time.

15. The method of claim 13, further comprising:

generating a graphical representation of at least a section of a geographic area covered by the wireless network; and

plotting each measured signal strength on said graphical representation, based on the identified location.

16. The method of claim 12, further comprising reconfiguring the wireless network based on the analysis, wherein reconfiguring includes at least one of optimizing a position of at least one antenna based on the analysis and scheduling maintenance of at least one antenna based on the analysis.

17. The method of claim 12, wherein said signal is sent over at least one out-of-band channel of the wireless network.

18. The method of claim 12, wherein selecting the plurality of wireless devices is based on at least one of a geographic location, a service provider, and a wireless device characteristic.

19. The method of claim 18, wherein the wireless device characteristic includes at least one of a make, a model, and an operating mode.

20. The method of claim 12, wherein each of the plurality of wireless devices is further configured to determine the current approximate location of the wireless device by first attempting to gather GPS data, and when GPS data is unavailable, then determining the approximate location using a cellular-based trilateration technique.

21. The method of claim 12, further comprising transmitting the ping to the wireless device over at least one control channel.

22. The method of claim 12, further comprising sending the ping in response to a schedule provided by the network operations center.

23. The method of claim 12, further comprising sending the ping in response to a predefined event.

24. A system comprising:

a network operations center communicatively coupled to a plurality of wireless devices, said network operations center being configured to;

select a subset of said plurality of wireless devices,

send a command over a wireless network to said subset of said plurality of wireless devices, wherein the command includes a schedule for initiating a ping over the wireless network,

receive data in response to said ping initiated by said schedule, and

analyze said received data; and

at least one wireless device configured for operation in a wireless network, said wireless device being configured to;

receive said ping from said network operations center via said wireless network;

measure a signal strength of downstream wireless signals received by said wireless device, wherein measuring said signal strength is performed in response to receiving said ping;

determine a current approximate location of said wireless device,

determine an approximate time at which said measurement of signal strength is obtained, and

transmit signals representative of said signal strength, said location, said time, and a device identifier to said network operations center upstream over said wireless network.

25. The system of claim 24, wherein said network operations center is configured to map said signal strength to at least a section of a geographic area covered by the wireless network, based on said location.

26. The system of claim 24, wherein said network operations center is configured to:

generate a graphical representation of at least a section of a geographic area covered by the wireless network; and

plot said signal strength to said graphical representation, based on said location.

27. The system of claim 24, wherein said network operations center is further configured to

generate a graphical representation of at least a section of a geographic area covered by the wireless network;

and

plot said signal strength to said graphical representation, based on said location and said time.

28. The system of claim 24, wherein said wireless device includes global positioning system (“

GPS”

) capabilities to receive GPS signals from GPS satellites and to determine said current approximate location using said GPS signals.

29. The system of claim 28, wherein said wireless device is further configured to determine said current approximate location of said wireless device by first attempting to gather GPS data, and when GPS data is unavailable, then determining said approximate location using a cellular-based trilateration technique.

30. The system of claim 24, wherein said wireless device is configured to transmit said signals representative of said signal strength, said location, said time, and said device identifier to said network operations center using at least one upstream control channel or at least one out-of-band channel of the wireless network.

31. The system of claim 24, wherein said device identifier includes at least one characteristic of said wireless device, including a make, a model, and an operating mode.

32. The system of claim 24, wherein said ping is transmitted to said wireless device over at least one control channel.

33. The system of claim 24, wherein said ping is initiated by said network operations center.

34. The system of claim 24, wherein said ping is initiated based on a predefined event.