SYSTEM AND METHOD FOR REDUCING DESENSITIZATION OF A BASE STATION TRANSCEIVER FOR MOBILE WIRELESS REPEATER SYSTEMS

• US 20170134085A1
• Filed: 01/23/2017
• Published: 05/11/2017
• Est. Priority Date: 06/08/2011
• Status: Active Grant

• Current Assignee: Andrew Wireless Systems GmbH (CommScope Holding Company, Inc.)
• Original Assignee: Andrew Wireless Systems GmbH (CommScope Holding Company, Inc.)
• Inventors: Dussmann, Alfons
• Granted Patent: US 10,009,090 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/15528 Control of operation parameters of a relay station to exploit the physical medium
• 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: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A repeater system including bi-directional amplifier circuitry that is configured for repeating signals between at least one device and a first signal source. Receiver circuitry is coupled with the amplifier circuitry provides at least one signal associated with at least one of a device or the first signal source or a second signal source. Controller circuitry is configured for monitoring a parameter of a provided signal that is reflective of a property of a signal source or a device. The monitored parameter is used to make a determination of whether repeated signals associated with the first signal source will desensitize the operation of the second signal source. The controller circuitry is also operable for adjusting the power level of the signals that are repeated by the bi-directional amplifier circuitry based on the determination that repeated signals will desensitize the operation of the second signal source.

Claims

1. A repeater system, comprising:

operational circuitry configured to repeat signals between at least one device and at least one signal source, the operational circuitry including receiver circuitry configured to receive downlink signals from a plurality of signal sources and to receive uplink signals from at least one device and transmitter circuitry configured to transmit uplink signals to at least one signal source;

controller circuitry configured to control the transmitter circuitry and to monitor at least one downlink signal parameter from a plurality of signal sources and at least one uplink signal parameter from the device, the controller circuitry further configured to use the monitored parameters to determine whether transmitted uplink signals will desensitize the operation of at least one of the plurality of signal sources and to adjust the power level of the transmitted uplink signals to avoid desensitization.

2. The repeater system of claim 1, wherein at least one monitored signal parameter is reflective of a property of the signal source that includes at least one of a location of the signal source with respect to the repeater system, or a path loss between the repeater system and the signal source or a strength of a downlink signal received from the signal source.

3. The repeater system of claim 1, wherein at least one monitored downlink signal parameter is a received signal strength indicator (RSSI) value associated with a downlink signal from at least one of the plurality of signal sources.

4. The repeater system of claim 3, wherein the controller circuitry is further configured to compare the RSSI value to a threshold and to reduce the power level of the transmitted uplink signals in response to the RSSI value exceeding the threshold.

5. The repeater system of claim 1, wherein the at least one monitored downlink signal parameter is reflective of the strength of the downlink signal and the controller circuitry is configured to determine a comparison value that includes a difference value that reflects the difference between the downlink signal parameters associated with the downlink signals from the plurality of signal sources and compare the difference value to a threshold, wherein the controller circuitry is further configured to adjust the power level of the transmitted uplink signals in response to the comparison to the threshold.

6. The repeater system of claim 1, further comprising reducing the power level of the transmitted uplink signals.

7. The repeater system of claim 1, wherein at least one monitored uplink signal parameter is reflective of a property of the device that includes at least one of the frequency of uplink signals from the device or the power level of uplink signals from the device.

8. The repeater system of claim 7, wherein the controller circuitry is configured to determine if the frequency and power level of uplink signals from the device will yield intermodulation products that fall within a frequency band of at least one of the signal sources.

9. The repeater system of claim 1, wherein the power level is adjusted by a power reduction factor determined by the controller circuitry.

10. The repeater system of claim 1, wherein the power level is reduced incrementally.

11. The repeater system of claim 1, wherein at least one signal source is an EGSM signal source and at least one signal source is a GSM-R signal source.

12. A method of repeating signals between at least one device and at least one signal source, the method comprising:

receiving downlink signals from a plurality of signal sources and uplink signals from at least one device and transmitting uplink signals to at least one signal source;

monitoring at least one downlink signal parameter from a plurality of signal sources and at least one uplink signal parameter from the device;

using the monitored parameters to determine whether transmitted uplink signals will desensitize the operation of at least one of the plurality of signal sources; and

adjusting the power level of the transmitted uplink signals to avoid desensitization.

13. The method of claim 12, wherein at least one monitored signal parameter is reflective of a property of the signal source that includes at least one of a location of the signal source with respect to the repeater system, or a path loss between the repeater system and the signal source or a strength of a downlink signal received from the signal source.

14. The method of claim 12, further comprising monitoring a received signal strength indicator (RSSI) value associated with a downlink signal from at least one of the plurality of signal sources.

15. The method of claim 14, further comprising comparing the RSSI value to a threshold and reducing the power level of the transmitted uplink signals in response to the RSSI value exceeding the threshold.

16. The method of claim 12, wherein the power level is reduced incrementally.

17. The method of claim 12, wherein the at least one monitored downlink signal parameter is reflective of the strength of the downlink signal and further comprising:

determining a comparison value that includes a difference value that reflects the difference between the downlink signal parameters associated with the downlink signals from the plurality of signal sources;

comparing the difference value to a threshold; and

adjusting the power level of the transmitted uplink signals in response comparison to the threshold.

18. The method of claim 12, wherein at least one monitored uplink signal parameter is reflective of a property of the device that includes at least one of the frequency of uplink signals from the device or the power level of uplink signals from the device, the method further comprising determining if the frequency and power level of uplink signals from the device will yield intermodulation products that fall within a frequency band of at least one of the signal sources.

19. The method of claim 12, wherein at least one signal source is an EGSM signal source and at least one signal source is a GSM-R signal source.

20. The method of claim 12, wherein the power level is adjusted by a power reduction factor determined by controller circuitry.