NEUTRAL HOST ARCHITECTURE FOR A DISTRIBUTED ANTENNA SYSTEM

• US 20180184404A1
• Filed: 10/17/2017
• Published: 06/28/2018
• Est. Priority Date: 08/17/2010
• Status: Active Grant

• Current Assignee: Dali Wireless Inc. (Dali Systems Co., Ltd.)
• Original Assignee: Dali Systems Co., Ltd.
• Inventors: Lemson, Paul, Stapleton, Shawn Patrick, Trajkovic, Sasa
• Granted Patent: US 10,334,567 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 1/18 Input circuits, e.g. for coupling to an antenna or a transmission line coupling networks between antennas or lines and receivers independent of the nature of the receiver H03H
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04W 72/04 Wireless resource allocation

Abstract

A remote radio head unit (RRU) system for achieving high data rate communications in a Distributed Antenna System is disclosed. The Distributed Antenna System is configured as a Neutral Host enabling multiple operators to exist on one DAS system. The present disclosure enables a remote radio head unit to be field reconfigurable and support multi-modulation schemes (modulation-independent), multi-carriers, multi-frequency bands and multi-channels. As a result, the remote radio head system is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems.

Claims

1. (canceled)

2. A remotely reconfigurable remote radio head unit (RRU) comprising:

a plurality of RRU band modules; and

an access module coupled to the plurality of RRU band modules comprising;

an optical transceiver configured to convert an optical signal to an electronic signal associated with a first data rate;

a field programmable gate array (FPGA) coupled to the optical transceiver, wherein the FPGA further comprises;

a multiplexer/demultiplexer configured to convert the electronic signal associated with the first data rate to a plurality of signals, each signal of the plurality of signals having a second data rate less than the first data rate; and

a framer/deframer configured to receive the plurality of signals at the second data rate, and frame RRU data from the plurality of signals at the second data rate for an individual RRU band module of the plurality of RRU band modules; and

a plurality of RRU outputs coupled to the FPGA and configured to provide the framed RRU data to the plurality of RRU band modules.

3. The RRU of claim 2 wherein the access module has separately reconfigurable parameters associated with each of the plurality of RRU band modules.

4. The RRU of claim 3 wherein the separately reconfigurable parameters comprise at least one of an operator, frequency, or carrier.

5. The RRU of claim 3 further comprising an Ethernet switch for communicating the separately reconfigurable parameters to the plurality of RRU band modules.

6. The RRU of claim 2 wherein the optical transceiver further comprises a small form factor pluggable optic transceiver configured to operate on at least two distinct wavelengths.

7. The RRU of claim 2 further comprising a software control operable to provide a Flexible Simulcast capability.

8. The RRU of claim 2 wherein the optical signal is an analog optical signal.

9. The RRU of claim 2 wherein each RRU band module of the plurality of RRU band modules is PCMCIA compatible.

10. The RRU of claim 2 wherein one or more RRU band modules of the plurality of RRU band modules has a diversity receive branch.

11. The RRU of claim 2 further comprising power over Ethernet.

12. A remotely reconfigurable remote radio head unit (RRU) comprising:

a plurality of RRU band modules; and

an access module coupled to the plurality of RRU band modules comprising;

an RF-to-Digital interface configured to output an electronic signal associated with a first data rate;

a field programmable gate array (FPGA) coupled to the RF-to-Digital interface, wherein the FPGA further comprises;

a multiplexer/demultiplexer configured to convert the electronic signal associated with the first data rate to a plurality of signals, each signal of the plurality of signals having a second data rate less than the first data rate;

a framer/deframer configured to receive the plurality of signals at the second data rate and frame RRU data from the plurality of signals at the second data rate for an individual RRU band module of the plurality of RRU band modules; and

a plurality of RRU outputs coupled to the FPGA and configured to provide the framed RRU data to the plurality of RRU band modules.

13. The RRU of claim 12 wherein the access module has separately reconfigurable parameters associated with each of the plurality of RRU band modules.

14. The RRU of claim 13 wherein the separately reconfigurable parameters comprise at least one of an operator, frequency, or carrier.

15. The RRU of claim 13 further comprising an Ethernet switch for communicating the separately reconfigurable parameters to the plurality of RRU band modules.

16. The RRU of claim 12 wherein the access module further comprises an optical transceiver further comprises a small form factor pluggable optic transceiver configured to convert an optical signal to a second electronic signal associated with the first data rate, wherein the FPGA is configured to convert the second electronic signal to a second plurality of signals and frame RRU data from the plurality of signals and the second plurality of signals.

17. The RRU of claim 12 further comprising a software control operable to provide a Flexible Simulcast capability.

18. The RRU of claim 12 wherein each RRU band module of the plurality of RRU band modules is PCMCIA compatible.

19. The RRU of claim 12 wherein one or more RRU band modules of the plurality of RRU band modules has a diversity receive branch.

20. The RRU of claim 12 further comprising power over Ethernet.