RELAY STATION AND WIRELESS COMMUNICATION SYSTEM USING THE SAME

• US 20100142417A1
• Filed: 05/18/2009
• Published: 06/10/2010
• Est. Priority Date: 06/30/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: JO, Jun Ho, KIM, Byoung Hoon
• Granted Patent: US 8,331,271 B2
• Time in Patent Office: Days
• US Class Current: 370/281
• CPC Class Codes: H04B 7/15557 Selecting relay station operation mode, e.g. between amplify and forward mode, decode and forward mode or FDD - and TDD mode
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user

Abstract

A relay station, method and system operated in a frequency division duplex (FDD) are disclosed. The relay station is operated in a band switching FDD mode and/or a dual band transmit (Tx)/receive (Rx) mode. In the band switching FDD mode, Tx frequency and Rx frequency are switched. In the dual band Tx/Rx mode, concurrent transmission or concurrent reception is achieved in the Tx frequency and Rx frequency.

Claims

1. A wireless communication system configured to operate in a frequency division duplex (FDD) mode in which a transmit (Tx) frequency and a receive (Rx) frequency are switched between a first frequency band and a second frequency band, comprising:

a relay station (RS);

a first station configured to transmit a first signal in the first frequency band via the RS operating in the band switching FDD mode, receive a second signal in the second frequency band via the RS, and communicate in a half duplex mode or a full duplex mode; and

a second station configured to receive the first signal in the first frequency band via the RS, transmit the second signal in the second frequency band via the RS, and communicate in the half duplex mode or the full duplex mode.

2. The wireless communication system of claim 1, wherein the band switching FDD mode includes switching multiplexing schemes when different multiplexing schemes are used in the first frequency band and the second frequency band.

3. The wireless communication system of claim 1, wherein the RS is further configured to operate in a dual band transmit (Tx)/receive (Rx) mode in which concurrent signal transmissions or concurrent signal receptions occur in the first frequency band or the second frequency band.

4. The wireless communication system of claim 1, wherein the second station is configured to directly receive the first signal, and to combine the relayed first signal with the directly received first signal.

5. The wireless communication system of claim 1, wherein the first station is configured to directly receive the second signal, and to combine the relayed second signal with the directly received second signal.

6. The wireless communication system of claim 1, wherein the first station is a base station (BS) and the second station is a mobile station (MS).

7. The wireless communication system of claim 1, wherein the first station is a MS and the second station is a BS.

8. A relay station for wirelessly relaying communication between a source station and a destination station, comprising:

a transceiver configured to operate in a band switching FDD mode or a dual band Tx/Rx mode,

wherein, in the band switching FDD mode, a transmit (Tx) frequency and a receive (Rx) frequency are switched between a first frequency band and a second frequency band, and

wherein, in the dual band Tx/Rx mode, concurrent transmission or concurrent reception is achieved in the first frequency band or the second frequency band.

9. The relay station of claim 8, wherein the transceiver is configured to operate based on the band switching FDD mode and the dual band Tx/Rx mode.

10. The relay station of claim 8, wherein the transceiver is configured to change operation modes from the band switching FDD mode to the dual band Tx/Rx mode or from the dual band Tx/Rx mode to the band switching FDD mode.

11. The relay station of claim 8, wherein the source station is a BS and the destination station is a MS.

12. The relay station of claim 8, wherein the source station is a MS and the destination station is a BS.

13. The relay station of claim 8, wherein at least one of the source station and the destination station is configured to support the band switching FDD mode or the dual band Tx/Rx mode.

14. The relay station of claim 8, wherein the first frequency band and the second frequency band are different frequency bands.

15. A method of relaying information via a relay station in a wireless communication system, the method comprising:

receiving a first signal in a first frequency band from a source station;

relaying a second signal in a second frequency band to a destination station; and

switching the first frequency band to the second frequency band used to relay the second signal to the destination station or switching the second frequency band to the first frequency band used to receive the first signal from the source station.

16. A wireless communication device configured to operate in a frequency division duplex (FDD) mode in which a transmit (Tx) frequency and a receive (Rx) frequency are switched between a first frequency band and a second frequency band, comprising:

a transceiver including a processor, the processor configured to cause the transceiver to transmit a first signal in the first frequency band via a relay station (RS) operating in the band switching FDD mode, receive a second signal in the second frequency band via the RS, and communicate in a half duplex mode or a full duplex mode.

17. A wireless communication device configured to operate in a frequency division duplex (FDD) mode in which a transmit (Tx) frequency and a receive (Rx) frequency are switched between a first frequency band and a second frequency band, comprising:

a transceiver including a processor, the processor configured to cause the transceiver to receive a first signal in a first frequency band via a relay station (RS), transmit a second signal in a second frequency band via the RS, and communicate in a half duplex mode or a full duplex mode.