Hybrid data transport for a virtualized distributed antenna system

• US 9,537,572 B2
• Filed: 02/26/2013
• Issued: 01/03/2017
• Est. Priority Date: 02/28/2012
• Status: Active Grant

• Current Assignee: Dali Wireless Inc. (Dali Systems Co., Ltd.)
• Original Assignee: Dali Systems Co., Ltd.
• Inventors: Stapleton, Shawn Patrick, Trajkovic, Sasa
• Primary Examiner(s): Phan, Hanh
• Application Number:
  US13/777,185
• Publication Number:
  US 20140072299A1
• Time in Patent Office: 1,407 Days
• Field of Search: 398/115, 398/116, 398/117, 398/66, 398/67, 398/68, 398/69, 398/70, 398/71, 398/72, 398/79, 398/98, 398/99, 398/100, 398/45, 398/48, 398/49, 398/46, 370/328, 370/338, 370/329, 370/312, 370/352, 370/389, 370/392, 370/468, 455/445, 455/422, 455/424, 455/450, 455/562.1, 455/509
• US Class Current: 1/1
• CPC Class Codes: H04B 10/25754 Star network topology
• CPC Class Codes: H04B 10/27 Arrangements for networking
• CPC Class Codes: H04W 16/24 Cell structures
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

A system for data transport in a Distributed Antenna System (DAS) includes a plurality of remote Digital Access Units (DAUs) located at a Remote location. The plurality of remote DAUs are coupled to each other and operable to transport digital signals between the plurality of remote DAUs. The system also includes a plurality of central hubs. Each of the plurality of central hubs is in communication with one of the remote DAUs using an electrical communications path. The system further includes a plurality of transmit/receive cells. Each of the plurality of transmit/receive cells includes a plurality of remote hubs. Each of the remote hubs in one of the plurality of transmit/receive cells is in communication with one of the plurality of central hubs using an optical communications path.

Claims

1. A system for data transport in a Distributed Antenna System (DAS), the system comprising:

a plurality of remote Digital Access Units (DAUs) located at a Remote location, wherein each of the plurality of remote DAUs includes at least one digital optical input;

a plurality of central hubs, each of the plurality of central hubs being in communication with one of the remote DAUs using an electrical communications path; and

a plurality of transmit/receive cells, each of the plurality of transmit/receive cells including a plurality of remote hubs, each of the remote hubs in one of the plurality of transmit/receive cells being in communication with one of the plurality of central hubs using an optical communications path.

2. The system of claim 1 further comprising a plurality of local Digital Access Units (DAUs) located at a Local location, each of the plurality of local DAUs being operable to receive an RF input from at least one of a plurality of Base Transceiver Stations (BTSs), each of the plurality of BTSs having one or more sectors.

3. The system of claim 2 further comprising a local mux/demux coupled to the plurality of local DAUs and a remote mux/demux coupled to the plurality of remote DAUs, wherein the local mux/demux and the remote mux/demux are connected via at least one of Ethernet cable, Optical Fiber, Microwave Line of Sight Link, Wireless Link, or Satellite Link.

4. The system of claim 3 wherein the local mux/demux and the remote mux/demux comprise at least one of CWDM or DWDM systems.

5. The system of claim 3 wherein the remote mux/demux is coupled to the plurality of remote DAUs by optical cables.

6. The system of claim 2 wherein the plurality of local DAUs are connected to the plurality of remote DAUs via at least one CWDM mux/demux and at least one optical fiber.

7. The system of claim 1 wherein each of the plurality of central hubs comprises:

a transmit path including an RF input and a plurality of optical outputs; and

a receive path including a plurality of optical inputs and an RF output.

8. The system of claim 1 further comprising a server coupled to each of the plurality of central hubs.

9. The system of claim 1 wherein the plurality of remote DAUs are operable to transport digital signals between the plurality of remote DAUs.

10. A system for data transport in a Distributed Antenna System, the system comprising:

a plurality of remote DAUs located at a Remote location, wherein the plurality of remote DAUs are coupled to each other and operable to transport signals between the plurality of remote DAUs, wherein each of the plurality of remote DAUs includes at least one digital optical input;

a central hub in communication with each of the plurality of remote DAUs using a plurality of electrical communications paths;

a plurality of transmit/receive cells, each of the plurality of transmit/receive cells including a plurality of remote hubs, each of the plurality of remote hubs being in communication with the central hub using one or more optical communications paths.

11. The system of claim 10 further comprising:

a plurality of Base Transceiver Stations (BTS), each having one or more sectors;

a plurality of BTS RF connections, each being coupled to one of the one or more sectors; and

a plurality of local Digital Access Units (DAUs) located at a Local location, each of the plurality of local DAUs being coupled to each other, operable to route signals between the plurality of local DAUs, and coupled to at least one of the plurality of BTS RF connections, wherein the plurality of local DAUs are in communication with the plurality of remote DAUs.

12. The system of claim 11 wherein the plurality of local DAUs are coupled via at least one of Ethernet cable, Optical Fiber, Microwave Line of Sight Link, Wireless Link, or Satellite Link.

13. The system of claim 11 further comprising a local mux/demux coupled to the plurality of local DAUs and a remote mux/demux coupled to the plurality of remote DAUs, wherein the local mux/demux and the remote mux/demux are connected via at least one of Ethernet cable, Optical Fiber, Microwave Line of Sight Link, Wireless Link, or Satellite Link.

14. The system of claim 13 wherein the local mux/demux and the remote mux/demux comprise at least one of CWDM or DWDM systems.

15. The system of claim 13 wherein the remote mux/demux is coupled to the plurality of remote DAUs by optical cables.

16. The system of claim 11 wherein the plurality of local DAUs are connected to the plurality of remote DAUs via at least one CWDM mux/demux and at least one optical fiber.

17. The system of claim 10 wherein the central hub comprises:

a transmit path including a plurality of RF inputs and a plurality of optical outputs; and

a receive path including a plurality of optical inputs and a plurality of RF outputs.

18. The system of claim 10 further comprising a server coupled to the central hub.

19. The system of claim 10 wherein the plurality of remote DAUs are operable to transport digital signals between the plurality of remote DAUs.

20. A method of transporting signals, the method comprising:

receiving a set of replicated optical signals;

providing a set of replicated signals associated with the set of replicated optical signals in a remote plane;

receiving a first replicated signal at an RF input of a first central hub;

receiving a second replicated signal at an RF input of a second central hub, wherein the second replicated signal is a replication of a different signal than the first replicated signal;

transporting a first optical signal associated with the first replicated signal to a first remote hub;

transporting a second optical signal associated with the second replicated signal to a second remote hub;

broadcasting a first analog signal from the first remote hub; and

broadcasting a second analog signal from the second remote hub.

21. The method of claim 20 wherein the replicated signals comprise analog signals.

22. The method of claim 20 wherein providing the set of replicated signals comprises transporting the set of replicated signals using an RF cable.

23. The method of claim 20 wherein transporting the first optical signal comprises transmitting the first optical signal though a first optical fiber and transporting the second optical signal comprises transmitting the second optical signal through a second optical fiber.

24. A method of performing dynamic sectorization, the method including:

providing a set of replicated signals in a remote plane;

receiving the set of replicated signals at RF inputs of a central hub;

switching a first replicated signal from a first RF input to a second modulator;

switching a second replicated signal from a second RF input to a first modulator;

modulating the first replicated signal and the second replicated signal;

converting a signal associated with the first replicated signal to a first optical signal;

converting a signal associated with the second replicated signal to a second optical signal;

providing the first optical signal at a first optical output of the central hub; and

providing the second optical signal at a second optical output of the central hub.

25. The method of claim 24 wherein the first replicated signal comprises a first analog signal associated with a first set of sectors and the second replicated signal comprises a second analog signal associated with a second set of sectors.

26. The method of claim 25 wherein the central hub comprises a switching matrix coupled to the RF inputs of the central hub.

27. The method of claim 26 wherein the switching matrix is further coupled to a plurality of sets of modulators.