Method and system for controlling remote in a TDD optical repeater

• US 7,826,430 B2
• Filed: 11/09/2007
• Issued: 11/02/2010
• Est. Priority Date: 01/03/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Jae-Hoon, Hwang, Seong-Taek, Kim, Sang-Ho, Kim, Byung-Jik
• Primary Examiner(s): LEE, CHI HO A
• Application Number:
  US11/983,483
• Publication Number:
  US 20080159743A1
• Time in Patent Office: 1,089 Days
• Field of Search: 370/337, 370/338, 370/347, 370/350
• US Class Current: 370/337
• CPC Class Codes: H04J 14/02 Wavelength-division multiplex systems
• CPC Class Codes: H04J 3/0682 by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

A method and apparatus for transmitting data to an Access Point (AP) and a Mobile Station (MS) in a Time Division Duplex (TDD) optical repeater. A main donor generates a control frame for controlling a remote, upon receipt of data from the AP, and transmits the control frame to the remote during a non-downlink transmission period. The remote analyzes the control frame received from the main donor, detects sync information about a downlink signal and an uplink signal, and remote control information from the analyzed control frame, performs a control operation according to the detected remote control information, and generates a status frame for notifying the main donor of the status of the remote upon receipt of data from the MS. The status frame is transmitted from the remote to the main donor during a non-uplink transmission period.

Claims

1. A method for transmitting data to an Access Point (AP) and a Mobile Station (MS) in a Time Division Duplex (TDD) optical repeater, comprising:

(a) generating a control frame by a main donor for controlling a remote, upon receipt of data from the AP, and transmitting the control frame downstream to the remote by the main donor during a non-downlink transmission period in which the MS is otherwise permitted exclusive uplink transmission to the AP via TDD protocol;

(b) analyzing, by the remote, the control frame received from the main donor;

(c) detecting, by the remote, sync information about a downlink signal and an uplink signal and remote control information from the analyzed control frame in step (b); and

(d) performing, by the remote, a control operation according to the detected remote control information.

2. The method of claim 1, further comprising the remote generating a status frame for notifying the main donor of the status of the remote, upon receipt of data from the MS, and transmitting the status frame to the main donor by the remote during a non-uplink transmission period in which the AP is otherwise permitted exclusive downlink transmission to the MS via TDD protocol.

3. The method of claim 2, wherein the status frame transmitted by the remote includes sync information for synchronizing a downlink signal and an uplink signal, a remote on/off status information, a High Power Amplifier (HPA) status information, and a Low Noise Amplifier (LNA) status information.

4. The method of claim 1, wherein the control operation in step (d) comprises, when a remote on/off information is detected by the remote from the remote control information, controlling a power-on/off of the remote according to the remote on/off information.

5. The method of claim 1, wherein the control operation in step (d) comprises, when HPA control information is detected from the remote control information, the main donor controlling an HPA to amplify a downlink signal to a power level sufficient for transmitting the downlink signal wirelessly according to the HPA control information.

6. The method of claim 5, wherein the HPA control information controls the HPA to amplify the power level of the downlink signal within a predetermined range for wireless transmission to the MS.

7. The method of claim 1, wherein the control operation comprises controlling a switch to establish a downlink and uplink signal path by the remote, when time control information is detected from the remote control information, by generating a switch control signal according to the detected time control information.

8. The method of claim 1, wherein the control operation comprises, upon receipt of data from the MS, detecting LNA control information from the remote control information by the remote and controlling an LNA to amplify an uplink signal component according to the LNA control information.

9. The method of claim 1, wherein the control frame generated in step (a) includes sync information for synchronizing a downlink signal and an uplink signal, time control information for controlling a switching timing, remote on/off information, HPA control information, and LNA control information.

10. The method of claim 1, further comprising demultiplexing by the main donor a received optical uplink signal from at least one of said remote into a plurality of optical signals.

11. An apparatus for transmitting data to an Access Point (AP) and a Mobile Station (MS) in a Time Division Duplex (TDD) optical repeater, comprising:

a remote;

a main donor in communication with said remote, said main donor comprising a control frame generator for generating a control frame for controlling the remote upon receipt of a downlink data signal from the AP, and for transmitting the control frame to the remote during a non-downlink transmission period in which the MS is otherwise permitted exclusive uplink transmission to the AP via TDD protocol; and

wherein said remote comprising control signal analyzer/generator for analyzing the control frame generated by the control frame generator and received from the main donor, a control signal generator for performing a control operation according to the analyzed control frame, for generating a status frame for notifying the main donor of a status of the remote, and for transmitting the status frame to the main donor during a non-uplink transmission period in which the AP is otherwise permitted exclusive downlink transmission to the MS via TDD protocol.

12. The apparatus of claim 11, wherein the main donor comprises an electrical to optical converter for converting the downlink signal from the AP and control information output from the control frame generator into an optical signal for optical transmission to the remote, and an optical to electrical converter for converting an optical signal received from the remote to an electrical uplink signal means for transmitting the uplink signal to the AP.

13. The apparatus of claim 12, wherein the main donor further comprises a Low Noise Amplifier (LNA) for amplifying the downlink signal received from the AP, a first signal combiner for combining the amplified downlink signal with the control frame received from the control generator, a Wavelength Division Multiplexer (WDM) for multiplexing the optical signal output from said electrical to optical converter, a first switch for providing a first path for the status frame from the remote to the control frame generator, and a High Power Amplifier (HPA) for amplifying the electrically converted uplink signal provided by a second path of the first switch.

14. The apparatus of claim 13, wherein the HPA amplifies the uplink signal to a power level sufficient for reception by the AP.

15. The apparatus of claim 13, wherein the WDM in the main donor demultiplexing a received optical signal into a plurality of optical signals.

16. The apparatus of claim 12, wherein the remote comprises an O/E converter for converting an optical signal received from the main donor into an electrical downlink signal for transmission to the MS, and an E/O converter for converting an uplink signal received from the MS into an optical signal for transmission to the main donor.

17. The apparatus of claim 16, wherein the remote further comprises a WDM for transmission of the optically converted uplink signal to the WDM of the main donor, a signal separator for separating a control frame from a downlink signal received from the O/E converter in said remote, an HPA for amplifying the downlink signal received from the signal separator, a second switch for providing a downlink signal path for transmission to the MS, and for providing an uplink signal path from the MS, an LNA for providing low noise amplification for the uplink signal received from the second switch, and a second signal combiner for combining an uplink signal received from the LNA with the status frame generated from the control signal generator.

18. The apparatus of claim 17, wherein the signal separator separates the control frame from the downlink signal received from the O/E converter and for transmitting the control frame to the control signal generator.