Connection mapping in distributed communication systems

• US 9,385,810 B2
• Filed: 09/23/2014
• Issued: 07/05/2016
• Est. Priority Date: 09/30/2013
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Optical Communications Wireless Ltd. (Corning Incorporated)
• Inventors: Hazani, Ami
• Primary Examiner(s): Li, Shi K
• Application Number:
  US14/493,988
• Publication Number:
  US 20150093106A1
• Time in Patent Office: 651 Days
• US Class Current: 1/1
• 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: H04L 43/0811 by checking connectivity
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

Power management techniques in distributed communication systems are disclosed. Related components, systems, and methods are also disclosed. In embodiments disclosed herein, the power available at a remote unit (RU) is measured and compared to the power requirements of the RU. In an exemplary embodiment, voltage and current is measured for two dummy loads at the RU and these values are used to solve for the output voltage of the power supply and the resistance of the wires. From at these values, a maximum power available may be calculated and compared to power requirements of the RU.

Claims

1. A remote unit for use in a distributed communication system, comprising:

an antenna capable of transmitting into a coverage area;

a power port configured to receive a direct current (DC) power signal from a power distribution module through a power medium;

an alternating current (AC) filter coupled to the power port configured to filter out AC signals from the DC power signal and provide DC power to the remote unit;

a DC filter coupled to the power port and configured to filter out the DC power signal from AC signals received from the power medium;

an AC test signal detection circuit coupled to the DC filter and configured to detect an AC test signal arriving at the power port from the power medium; and

a slave controller coupled to the AC test signal detection circuit and configured to;

generate a response for transmission to a master controller on detection of the AC test signal.

2. The remote unit of claim 1, wherein the slave controller is further configured to receive a management signal from the master controller, wherein the management signal contains information relating to the AC test signal.

3. The remote unit of claim 2, further comprising a management signal port distinct from the power port.

4. The remote unit of claim 3, wherein the remote unit is uniquely addressable within the distributed communication system.

5. The remote unit of claim 4, further comprising power conditioning circuitry coupled to the AC filter.

6. The remote unit of claim 1, further comprising a transceiver configured to provide wireless communication and wherein the transceiver is powered by the DC power signal.

7. A distributed communication system, comprising:

a plurality of remote units, each remote unit having one or more antennas capable of transmitting into a coverage area;

a power unit configured to provide power to one or more of the plurality of remote units across one or more power media;

a control system configured to;

cause an alternating current (AC) test signal to be created at the power unit;

send the AC test signal via the one or more power media to one or more of the plurality of remote units; and

receive an acknowledgment signal from one or more of the plurality of remote units indicating receipt of the AC test signal, wherein

each of the remote units comprises;

a power input port coupled to one of the power media;

an AC signal detection circuit coupled to the power input port; and

a remote slave controller configured to;

use the AC signal detection circuit to detect the AC test signal; and

generate the acknowledgment signal.

8. The distributed communication system of claim 7, wherein the power unit comprises an AC test signal injection circuit configured to create the AC test signal and direct current (DC) power conditioning circuit configured to provide DC power;

and the power unit is configured to sum the AC test signal and the DC power.

9. The distributed communication system of claim 7, wherein the power unit comprises a plurality of power outputs, each connected to a respective one of the one or more power media.

10. The distributed communication system of claim 9, wherein the control system is further configured to map power outputs to remote units based on receipt of acknowledgment signals.

11. The distributed communication system of claim 10, wherein each remote unit comprises a transceiver for wireless communication through the one or more antennas.

12. The distributed communication system of claim 11, further comprising a communication signal medium coupled to one of the remote units for carrying communication signals to the remote unit, wherein the communication signals are associated with the wireless communication.

13. The distributed communication system of claim 12, wherein the communication signal medium comprises a fiber optic cable and the plurality of remote units are located on a plurality of floors of a building infrastructure.

14. A method of operating a distributed communication system, comprising:

coupling an output port of a power unit to a power medium;

coupling the power medium to a remote unit capable of transmitting into a coverage area;

generating an alternating current (AC) test signal at the power unit;

sending the AC test signal to the remote unit;

receiving an acknowledgment signal from the remote unit;

coupling a plurality of output ports of the power unit to respective power media and coupling the power media to respective remote units;

generating and sending a respective AC test signal for each remote unit; and

mapping remote units to output ports based on received acknowledgement signals.

15. The method of claim 14, further comprising comparing mapped remote units to output ports to an intended map of remote units to output ports.

16. The method of claim 14, further comprising coupling a head end unit to the remote unit using a fiber optic cable.