Distribution of time-division multiplexed (TDM) management services in a distributed antenna system, and related components, systems, and methods

• US 9,621,293 B2
• Filed: 01/19/2015
• Issued: 04/11/2017
• Est. Priority Date: 08/07/2012
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Optical Communications Wireless Ltd. (Corning Incorporated)
• Inventors: Hazani, Ami, Nisan, Ofer
• Primary Examiner(s): Musa, Abdelnabi O
• Application Number:
  US14/599,710
• Publication Number:
  US 20150131632A1
• Time in Patent Office: 813 Days
• CPC Class Codes: H04B 7/04 using two or more spaced independent antennas
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 74/085 collision avoidance
• CPC Class Codes: H04W 88/085 Access point devices with remote components
• CPC Class Codes: H04W 92/12 between access points and access point controllers

Abstract

Distribution of management services in distributed antenna systems having a central unit and remote units configured to time-division multiplex (TDM) downlink and/or uplink management signals into time slots to form a TDM management frame signal. In this manner, collision will not occur between multiple management signals communicated over a common communications medium at the same time in the distributed antenna system. Collision detection and management mechanism can add design complexity, cost by requiring additional components, and require additional area on electronic boards. The TDM management frame signal may also be modulated at a carrier frequency before being combined with RF communications signals so that the combined signals are within a linear range of shared certain communications components to reduce cost and area.

Claims

1. A central unit for providing communications signals and management signals in a distributed antenna system and comprising a media access controller in communication with a transceiver circuit, the central unit being configured to:

receive a plurality of downlink management signals from at least one management controller for distribution to a respective plurality of remote units;

time-division multiplex (TDM) the plurality of downlink management signals into time slots of the respective plurality of remote units to form a TDM downlink management frame signal;

receive downlink radio frequency (RF) communication signals of at least one RF-communications frequency band for at least one RF communications service;

combine the TDM downlink management frame signal with the downlink RF communication signals;

send the combined TDM downlink management frame signal and the downlink RF communications signals to the respective plurality of remote units over a downlink communications link, wherein the plurality of downlink management signals includes at least one of a configuration management signal, a gain control signal, a status signal, an alarm signal, and a fault signal, and wherein at least a portion of the downlink communications link is comprised of at least one downlink optical fiber; and

modulate the TDM downlink management frame signal in a management services frequency band different from the at least one RF communications frequency band, wherein

the central unit comprises at least one electrical-to-optical converter configured to convert the combined TDM downlink management frame signal and the downlink RF communication signals into a combined TDM downlink optical management frame signal and downlink optical RF communications signals.

2. The central unit of claim 1, further configured to synchronize the plurality of downlink management signals.

3. The central unit of claim 1, wherein the TDM downlink management frame signal is comprised of Ethernet protocol signals.

4. The central unit of claim 1, wherein the management services frequency band above 2500 MegaHertz (MHz).

5. The central unit of claim 1, further comprising a transceiver configured to modulate the TDM downlink management frame signal in the management services frequency band.

6. The central unit of claim 1, wherein at least a portion of the downlink communications link is comprised of at least one downlink coaxial cable.

7. The central unit of claim 1, further comprising an optical splitter configured to split the combined TDM downlink optical management frame signal and the downlink optical RF communications signals into a plurality of combined TDM downlink optical management frame signal and the downlink optical RF communications signals to be sent to the plurality of remote units.

8. The central unit of claim 1, further configured to receive a plurality of combined uplink RF communications signals and TDM uplink management frame signals over an uplink communications link from each of the plurality of remote units for the at least one RF communications service.

9. The central unit of claim 8, further comprising a splitter configured to split each of the plurality of combined uplink RF communications signals and TDM uplink management frame signals into a plurality of uplink RF communications signals and a plurality of TDM uplink management frame signals.

10. The central unit of claim 9, further configured to combine each of the plurality of uplink RF communications signals into a combined uplink RF communications signal, and to provide the combined uplink RF communications signal to at least one network.

11. The central unit of claim 9, further configured to combine each of the plurality of TDM uplink management frame signals into a combined TDM uplink management frame signal, and to demodulate the combined TDM uplink management frame signal to provide a combined demodulated TDM uplink management frame signal.

12. The central unit of claim 11, further comprising a transceiver configured to demodulate the combined TDM downlink management frame signal to provide the combined demodulated TDM uplink management frame signal.

13. The central unit of claim 12, further configured to translate the combined demodulated TDM uplink management frame signal into individual uplink management signals each originating from a remote unit among the plurality of remote units, the central unit further comprising a management services circuit configured to translate the combined demodulated TDM uplink management frame signal into individual uplink management signals each originating from a remote unit among the plurality of remote units.

14. A distributed antenna system comprising:

at least one central unit comprising a media access controller in communication with a transceiver circuit, the central unit being configured to;

receive a plurality of downlink management signals from at least one management controller for distribution to a respective plurality of remote units;

time-division multiplex (TDM) the plurality of downlink management signals into time slots of the respective plurality of remote units to form a TDM downlink management frame signal;

receive downlink radio frequency (RF) communication signals of at least one RF communications frequency band for at least one RF communications service;

combine the TDM downlink management frame signal with the downlink RF communication signals; and

send the combined TDM downlink management frame signal and the downlink RF communications signals to the plurality of remote units over a downlink communications link; and

the plurality of remote units each configured to;

receive a plurality of uplink management signals from at least one client device;

time-division multiplex (TDM) the plurality of uplink management signals into individual time slots to form a TDM uplink management frame signal;

receive uplink RF communication signals of at least one RF communications frequency band for at least one RF communications service;

combine the TDM uplink management frame signal with the uplink RF communication signals; and

send the combined TDM uplink management frame signal and the uplink RF communications signals to the at least one central unit over an uplink communications link,

wherein the central unit is further configured to receive a plurality of combined uplink RF communications signals and TDM uplink management frame signals over an uplink communications link from each of the plurality of remote units for the at least one RF communications service, and wherein the central further comprises at least one optical-to-electrical converter configured to convert the plurality of combined uplink RF communications signals and TDM uplink management frame signals into a combined uplink optical RF communications signals and TDM uplink optical management frame signal.

15. The system of claim 14, wherein the central unit is further configured to modulate the TDM downlink management frame signal in a management services frequency band different from the at least one RF communications frequency band.

16. The system of claim 14, wherein the central unit further comprises at least one electrical-to-optical converter configured to convert the combined TDM downlink management frame signal and the downlink RF communication signals into a combined TDM downlink optical management frame signal and downlink optical RF communications signals.

17. The system of claim 14, wherein the remote unit is further configured to modulate the TDM uplink management frame signal in a management services frequency band different from the at least one RF communications frequency band.

18. A distributed antenna system comprising:

at least one central unit comprising a media access controller in communication with a transceiver circuit, the central unit being configured to;

receive a plurality of downlink management signals from at least one management controller for distribution to a respective plurality of remote units;

time-division multiplex (TDM) the plurality of downlink management signals into time slots of the respective plurality of remote units to form a TDM downlink management frame signal;

receive downlink radio frequency RF communication signals of at least one RF communications frequency band for at least one RF communications service;

combine the TDM downlink management frame signal with the downlink RF communication signals; and

send the combined TDM downlink management frame signal and the downlink RF communications signals to the plurality of remote units over a downlink communications link; and

the plurality of remote units each configured to;

receive a plurality of uplink management signals from at least one client device;

time-division multiplex (TDM) the plurality of uplink management signals into individual time slots to form a TDM uplink management frame signal;

receive uplink RF communication signals of at least one RF communications frequency band for at least one RF communications service;

combine the TDM uplink management frame signal with the uplink RF communication signals; and

send the combined TDM uplink management frame signal and the uplink RF communications signals to the at least one central unit over an uplink communications link,

wherein the remote unit further comprises at least one electrical-to-optical converter configured to convert the combined TDM uplink management frame signal and the uplink RF communications signals into a combined TDM uplink optical management frame signal and uplink optical RF communications signals, and wherein the remote unit is further configured to receive a plurality of combined downlink RF communications signals and TDM downlink management frame signals over a downlink communications link from the central unit for the at least one RF communications service.