System and method for detecting and measuring uplink traffic in signal repeating systems

• US 8,693,945 B2
• Filed: 12/04/2012
• Issued: 04/08/2014
• Est. Priority Date: 05/12/2010
• Status: Active Grant

• Current Assignee: CommScope Technologies, LLC (CommScope Holding Company, Inc.)
• Original Assignee: Andrew LLC (CommScope Holding Company, Inc.)
• Inventors: Kummetz, Thomas
• Primary Examiner(s): Gesesse, Tilahun B
• Application Number:
  US13/693,821
• Publication Number:
  US 20130095749A1
• Time in Patent Office: 490 Days
• Field of Search: 455/11.1, 455/7, 455/9, 455/15.16
• US Class Current: 455/11.1
• CPC Class Codes: H04B 17/40 of relay systems
• CPC Class Codes: H04B 7/15535 Control of relay amplifier gain amplifier gain control in general H03G3/00; gain control reducing self - or loop interference H04B7/15578
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic

Abstract

A signal repeating system for a wireless network includes an antenna configured for transceiving signals between a base station and a user equipment device. Repeating circuitry is coupled to the antenna and defines an uplink path for signals from the user equipment device to the base station and a downlink path for signals from the base station to the user equipment device. The repeating circuitry includes gain circuitry and gain control circuitry that is coupled to the gain circuitry. The gain control circuitry is operable for varying the gain of the repeating circuitry according to a waveform. Measurement circuitry measures the receive power in the uplink path over time from the user equipment device. Processing circuitry cross-correlates the inverted gain variation waveform with the measured receive power for determining the existence of traffic from user equipment devices in the uplink path.

Claims

1. A signal repeating system for a wireless network comprising:

at least one first antenna configured for transceiving signals with at least one user equipment device;

repeating circuitry coupled to the at least one first antenna and defining an uplink path for signals from the user equipment device back to a base station, the repeating circuitry including circuitry for varying the level of signals handled in the uplink path;

control circuitry in the repeating circuitry that is operable to control how the level of signals in the uplink path are varied;

measurement circuitry for measuring, over time, the receive power in the uplink path in a particular frequency band where traffic is expected from the at least one user equipment device;

processing circuitry configured for comparing a signal associated with the uplink path level variation with the measured receive power and for determining if a variation in the uplink path signal level causes a change in the measured receive power in order to detect the existence of traffic from user equipment devices in the uplink path.

2. The signal repeating system of claim 1 wherein the repeating circuitry has gain circuitry for varying the gain of signals handled in the uplink path, the control circuitry being operable for varying the gain of the repeating circuitry according to a waveform.

3. The signal repeating system of claim 2 wherein the control circuitry is further operable for varying an average gain of the gain circuitry.

4. The signal repeating system of claim 1 wherein the processing circuitry evaluates at least one peak resulting from the comparison of the signal associated with the uplink path level variation and the measured receive power for determining the existence of traffic from user equipment devices in the uplink path.

5. The signal repeating system of claim 1 further comprising a device operable for measuring a transmit power required from the at least one user equipment device by the base station for transceiving signals with the base station, the processing circuitry evaluating the transmit power measurement, along with results of the comparison of the signal associated with the uplink path level variation and the measured receive power, for determining the existence of traffic from user equipment devices in the uplink path.

6. The signal repeating system of claim 1 wherein the variation of the level of signals handled in the uplink path is synchronized with a parameter of the wireless network.

7. The signal repeating system of claim 1 wherein the variation of the level of signals handled in the uplink path is aligned, in at least one of phase or frequency, with a standard of the wireless network.

8. The signal repeating system of claim 1 wherein the circuitry for varying the level of signals handled in the uplink path has multiple stages, the control circuitry coupled in the repeating circuitry at a stage in the uplink path spaced from the antenna.

9. The signal repeating system of claim 1 further comprising at least one of a second antenna or a wire media link coupled with the repeating circuitry and operable for communicating with a base station.

10. The signal repeating system of claim 9 further comprising a master unit configured for communicating with the base station, a wire media link coupling the repeating circuitry with the master unit.

11. A distributed antenna system for a wireless network comprising:

a master unit configured for communicating with a base station;

at least one remote unit;

wire media link coupling the at least one remote unit and master unit;

the at least one remote unit including;

at least one antenna configured for transceiving signals with at least one user equipment device;

repeating circuitry coupled between the at least one antenna and defining an uplink path for signals from the user equipment device to a base station, the repeating circuitry including circuitry for varying the level of signals handled in the uplink path;

control circuitry in the repeating circuitry that is operable to control how the level of signals in the uplink path are varied;

measurement circuitry for measuring, over time, the receive power in the uplink path in a particular frequency band where traffic is expected from the at least one user equipment device;

processing circuitry configured for comparing a signal associated with the uplink path level variation with the measured receive power and for determining if a variation in the uplink path signal level causes a change in the measured receive power in order to detect the existence of traffic from user equipment devices in the uplink path.

12. A method for determining the existence of traffic in a signal repeating system for a wireless network, the method comprising:

transceiving signals between a base station and at least one user equipment device through a signal repeating system having an uplink path for signals from the user equipment device to the base station;

varying the level of signals handled in the uplink path;

measuring, over time, the receive power in the uplink path in a particular frequency where traffic is expected from the at least one user equipment device;

comparing a signal associated with the uplink path level variation with the measured receive power and determining if a variation in the uplink path signal level causes a change in the measured receive power in order to detect the existence of traffic from user equipment devices in the uplink path.

13. The method of claim 12 further comprising varying the gain of signals handled in the uplink path and varying the gain according to a waveform.

14. The method of claim 13 further comprising comparing the signal associated with the uplink path level variation with the measured receive power to provide multiple curves and averaging the multiple curves.

15. The method of claim 13 further comprising varying an average gain of the signals handled in the uplink path in addition to varying the gain according to a waveform.

16. The method of claim 12 further comprising evaluating at least one peak resulting from the comparison of the signal associated with the uplink path level variation and the measured receive power for determining the existence of traffic from user equipment devices in the uplink path.

17. The method of claim 12 further comprising measuring a transmit power required from the at least one user equipment device by the base station for transceiving signals with the base station and evaluating the transmit power measurement, along with results of the comparison of the signal associated with the uplink path level variation and the measured receive power, for determining the existence of traffic from user equipment devices in the uplink path.

18. The method of claim 12 further comprising synchronizing the variation of the level of signals handled in the uplink path with a parameter of the wireless network.

19. The method of claim 12 further comprising aligning the variation of the level of signals handled in the uplink path, in at least one of phase or frequency, with a standard of the wireless network.

20. The method of claim 12 further comprising varying the level of signals handled in the signal path at a stage in the uplink path that is spaced from an input to the uplink path.