Systems, methods, and devices for increasing radio frequency (RF) power in distributed antenna systems

• US 9,806,797 B2
• Filed: 09/23/2015
• Issued: 10/31/2017
• Est. Priority Date: 04/29/2011
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated), Ndsl, Inc.
• Original Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Inventors: Berlin, Igor, Cune, William Patrick, Greene, Jason Elliott
• Primary Examiner(s): SINGH, DALZID E
• Application Number:
  US14/862,635
• Publication Number:
  US 20160013844A1
• Time in Patent Office: 769 Days
• Field of Search: 398116
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04B 10/25753 Distribution optical network, e.g. between a base station and a plurality of remote units
• CPC Class Codes: H04B 10/808 Electrical power feeding of an optical transmission system
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0426 Power distribution
• CPC Class Codes: H04B 7/15507 Relay station based processing for cell extension or control of coverage area, network planning with network coordinated processing with regard to cell extension H04W16/26; network topologies using dedicated repeater stations H04W84/047; terminal devices adapted for relaying to or from an other terminal H04W88/04
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

A system, and related methods and devices, is disclosed for increasing an output power of a frequency band in a distributed antenna system that includes at least one RXU module that is operatively coupled to at least one RAU module. A first group of the plurality of channels within a first frequency band may be allocated to the RAU module, and a second group of the plurality of the channels within the first frequency band may be allocated to the RXU module. The at least one RAU module may be configured to receive RF signals from the first group of the plurality of channels being used in the first frequency band, and the at least one RXU module may be configured to receive RF signals from the second group of the plurality of channels being used in the first frequency band. In this manner, the amount of composite power per channel is increased.

Claims

1. A distributed antenna system, comprising:

at least one remote antenna unit (RAU) module configured to receive a first radio frequency (RF) signal and a second RF signal for a first frequency band supported by the distributed antenna system; and

at least one remote expansion unit (RXU) module operatively coupled to the at least one RAU module and comprising at least one antenna, the at least one RXU module configured to receive the second RF signal for the first frequency band supported by the distributed antenna system from the at least one RAU module.

2. The distributed antenna system of claim 1, wherein the at least one RAU module comprises at least one optical-to-electrical (O/E) converter configured to convert the first RF signal and the second RF signal comprising a first downlink optical RF communications signal and a second downlink optical RF communications signal to a respective first downlink electrical RF communications signal and a second downlink electrical RF communications signal.

3. The distributed antenna system of claim 2, wherein the at least one RAU module further comprises at least one electrical-to-optical (E/O) converter configured to convert an uplink electrical RF communications signal to an uplink optical RF communications signal.

4. The distributed antenna system of claim 1, wherein the at least one RAU module and the at least one RXU module are configured to provide RF communications services.

5. The distributed antenna system of claim 1, wherein the at least one RXU module is configured to receive the second RF signal comprising a downlink RF communications signal in the first frequency band.

6. The distributed antenna system of claim 5, wherein the at least one RXU module is configured to receive the downlink RF communications signal from the at least one RAU module.

7. The distributed antenna system of claim 1, wherein the at least one RXU module is configured to receive an uplink RF communications signal in the first frequency band.

8. The distributed antenna system of claim 1, wherein at least one of the at least one RAU module and the at least one RXU module further comprises a detector configured to provide a signal indicative of a total power of an RF signal received by the at least one of the at least one RAU module or the at least one RXU module.

9. The distributed antenna system of claim 1, wherein the at least one RAU module is further configured to receive the first RF signal and second RF signal from a first service provider among a plurality of service providers, and the at least one RXU module is further configured to receive the second RF signal from the at least one RAU module from the first service provider.

10. The distributed antenna system of claim 1, further comprising a plurality of RAU modules and a plurality of RXU modules, each of the plurality of RXU modules operatively coupled with at least one of the plurality of RAU modules, wherein:

at least one of the plurality of RAU modules is configured to receive the first RF signal and the second RF signal in a second frequency band supported by the distributed antenna system; and

at least one of the plurality of RXU modules is configured to receive the second RF signal in the second frequency band supported by the distributed antenna system from at least one RAU among the plurality of RAU module.

11. The distributed antenna system of claim 1, wherein the at least one RXU module further comprises at least one frequency conversion interface.

12. The distributed antenna system of claim 1, wherein the first RF signal is comprised of a first RF multiple-input, multiple-output (MIMO) signal for a MIMO communications service, and the second RF signal is comprised of a second RF MIMO signal for the MIMO communications service.

13. The distributed antenna system of claim 12, wherein the first RF MIMO signal is of a first frequency and the second RF MIMO signal received by the at least one RXU module is of a second frequency different from the first frequency.

14. The distributed antenna system of claim 13, wherein the at least one RXU module is further configured to frequency shift the second RF MIMO signal to the first frequency.

15. The distributed antenna system of claim 1, wherein the first RF signal is comprised of a first RF digital signal, and the second RF signal is comprised of a second RF digital signal.

16. A method of distributing radio frequency (RF) signals in a distributed antenna system, comprising:

receiving a first radio frequency (RF) signal and a second RF signal for a first frequency band supported by the distributed antenna system in at least one remote antenna unit (RAU) module; and

receiving the second RF signal for the first frequency band supported by the distributed antenna system from the at least one RAU module in at least one remote expansion unit (RXU) module operatively coupled to the at least one RAU module.

17. The method of claim 16, further comprising converting the first RF signal and the second RF signal comprising a first downlink optical RF communications signal and a second downlink optical RF communications signal to a respective first downlink electrical RF communications signal and a second downlink electrical RF communications signal in the at least one RAU module.

18. The method of claim 17, further comprising converting an uplink electrical RF communications signal to an uplink optical RF communications signal in the at least one RAU module.

19. The method of claim 16, wherein the first RF signal is comprised of a first RF communications signal for a RF communications service and the second RF signal is comprised of a second RF communications signal for a RF communications service.

20. The method of claim 16, comprising receiving the second RF communications signal comprising a downlink RF communications signal in the first frequency band in the at least one RXU module.

21. The method of claim 20, comprising receiving the downlink RF communications signal from the at least one RAU module in the at least one RXU module.

22. The method of claim 16, further comprising receiving an uplink RF communications signal in the first frequency band in the at least one RXU module.

23. The method of claim 16, further comprising at least one of the at least one RAU module and the at least one RXU module providing a signal indicative of a total power of an RF signal received by the at least one of the at least one RAU module or the at least one RXU module.

24. The method of claim 16, further comprising:

receiving the first RF signal and second RF signal from a first service provider among a plurality of service providers in the at least one RAU module; and

receiving the second RF signals from the at least one RAU module from the first service provider in the at least one RXU module.

25. The method of claim 16, wherein the first RF signal is comprised of a first RF multiple-input, multiple-output (MIMO) signal for a MIMO communications service, and the second RF signal is comprised of a second RF MIMO signal for the MIMO communications service.

26. The method of claim 25, wherein the first RF MIMO signal is of a first frequency and the second RF MIMO signal received by the at least one RXU module is of a second frequency different from the first frequency.

27. The method of claim 26, further comprising frequency shifting the second RF MIMO signal to the first frequency in the at least one RXU module.