REPEATING APPARATUS AND METHOD IN WIRELESS COMMUNICATION SYSTEM

• US 20110151775A1
• Filed: 09/20/2010
• Published: 06/23/2011
• Est. Priority Date: 12/21/2009
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: KANG, Byung-Su, KWON, Heon-Kook, LEE, Kwang-Chun
• Granted Patent: US 8,521,081 B2
• Time in Patent Office: Days
• US Class Current: 455/10
• CPC Class Codes: H04B 7/15535 Control of relay amplifier gain amplifier gain control in general H03G3/00; gain control reducing self - or loop interference H04B7/15578

Abstract

A repeating apparatus in a wireless communication system includes: a signal detection unit configured to receive a signal from a base station or a mobile station and detect strength of the signal; a control unit configured to compare the signal strength detected by the signal detection unit with signal strength predetermined by the system and provide comparison information; and an output signal control unit configured to receive the comparison information from the control unit and adjust and amplify gain of a signal transmitted to the base station or the mobile station.

Claims

1. A repeating apparatus in a wireless communication system, comprising:

a signal detection unit configured to receive a signal from a base station or a mobile station and detect strength of the signal;

a control unit configured to compare the signal strength detected by the signal detection unit with signal strength predetermined by the system and provide comparison information; and

an output signal control unit configured to receive the comparison information from the control unit and adjust and amplify gain of a signal transmitted to the base station or the mobile station.

2. The repeating apparatus of claim 1, further comprising:

an input/output antenna configured to receive a signal from the base station or the mobile station; and

an input/output stage configured to receive the signal from the input/output antenna and identify a transmitted/received signal.

3. The repeating apparatus of claim 1, wherein the signal detection unit comprises:

a low-noise amplifier configured to amplify the received signal;

a coupler configured to couple output of the amplifier; and

a signal detection stage configured to receive the output from the coupler and detect signal strength.

4. The repeating apparatus of claim 1, wherein the output signal control unit comprises:

a gain controller configured to receive a control signal of the control unit and a signal received by a coupler and perform automatic gain control; and

an output amplification stage configured to amplify the signal, the gain of the signal having been controlled by the gain controller, into a signal transmitted to the base station or the mobile station.

5. The repeating apparatus of claim 1, wherein the control unit is configured to interrupt the output amplification stage when the received signal strength is smaller than the predetermined signal strength.

6. The repeating apparatus of claim 1, wherein the control unit is configured not to interrupt the output amplification stage when the received signal strength is larger than the predetermined signal strength.

7. A repeating method in a mobile communication system, comprising:

receiving a signal of an uplink or downlink and detecting strength of the signal;

comparing the detected signal strength with predetermined signal strength provided by the system; and

suspending transmission of the received signal to the uplink or downlink when the detected signal strength is smaller than the predetermined signal strength and waiting for a signal to be received, detected strength of the signal being larger than the predetermined signal strength.

8. The repeating method of claim 7, further comprising transmitting the received signal to the uplink or the downlink when the detected signal strength is larger than the predetermined signal strength.

9. An apparatus for generating a repeater control signal by a mobile station in a mobile communication system, comprising:

a detector configured to receive a signal from the repeater and detect a received SNR value;

a reference value storage unit configured to store a requested SNR value requested by the system and a margin value;

a comparator configured to compare the received SNR value with a sum of the requested SNR value and the margin value and provide comparison information; and

a signal bit adding unit configured to add a predetermined first or second bit to a pilot channel based on the comparison information.

10. The apparatus of claim 9, further comprising:

a receiver configured to receive a signal from the repeater; and

a transmitter configured to transmit a signal from the mobile station to the base station.

11. The apparatus of claim 9, wherein the predetermined first bit is a decrease signal bit added to the pilot channel when the received SNR value is larger than the sum of the requested SNR value and the margin value.

12. The apparatus of claim 9, wherein the predetermined second bit is an increase signal bit added to the pilot channel when the received SNR value is smaller than the sum of the requested SNR value and the margin value.

13. A method for generating a repeater control signal by a mobile station in a mobile communication system, comprising:

receiving a signal from the repeater and detecting a received SNR value;

comparing the received SNR value with a sum of a requested SNR value and a margin value and providing comparison information; and

adding a predetermined first or second bit to a pilot channel based on the comparison information.

14. The method of claim 13, wherein the predetermined first bit is a decrease signal bit added to the pilot channel when the received SNR value is larger than the sum of the requested SNR value and the margin value.

15. The method of claim 13, wherein the predetermined second bit is an increase signal bit added to the pilot channel when the received SNR value is smaller than the sum of the requested SNR value and the margin value.