WIRELESS TRANSCEIVER AND RELAY STATION INCLUDING THE WIRELESS TRANSCEIVER

• US 20100142416A1
• Filed: 05/18/2009
• Published: 06/10/2010
• Est. Priority Date: 06/19/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: KIM, Byoung Hoon
• Granted Patent: US 8,064,372 B2
• Time in Patent Office: Days
• US Class Current: 370/281
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/15542 Selecting at relay station its transmit and receive resources selection of wireless resources by user or terminal H04W72/02; arrangements affording multiple use of the transmission path by two-dimensional division of the resources H04L5/0003, or by allocating sub-channels H04L5/003
• 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

Abstract

A wireless transceiver and a relay station (RS) including the wireless transceiver, where the wireless transceiver includes multiple antennas; and multiple radio frequency (RF) chain pairs that are connected one-to-one to the antennas and each of which being able to be set to operate on both a downlink frequency and an uplink frequency or to operate only on one of the downlink frequency and the uplink frequency. Each of the RF chain pairs may be able to switch a transmission (Tx) frequency and a reception (Rx) frequency between the downlink frequency and the uplink frequency. For example, each of the RF chain pairs may include a first Tx/Rx band switch that is connected between a local oscillator pair and a mixer pair; and a second Tx/Rx band switch that is connected between an amplifier pair and a duplexer.

Claims

1. A wireless transceiver for a relay station (RS), the wireless transceiver comprising:

a plurality of antennas; and

a plurality of radio frequency (RF) chain pairs which are coupled one-to-one to the plurality of antennas, each of the plurality of RF chain pairs configured to operate on both a downlink frequency and an uplink frequency or to operate only on one of the downlink frequency and the uplink frequency,

wherein each of the plurality of RF chain pairs is configured to switch a transmission (Tx) frequency and a reception (Rx) frequency between the downlink frequency and the uplink frequency.

2. The wireless transceiver of claim 1, wherein each of the plurality of RF chain pairs comprises:

a first Tx/Rx band switch coupled between a local oscillator pair and a mixer pair; and

a second Tx/Rx band switch coupled between an amplifier pair and a duplexer.

3. The wireless transceiver of claim 2, wherein each amplifier coupled to a corresponding second Tx/Rx band switch comprises a wideband amplifier configured to support the downlink frequency and the uplink frequency, or a group of narrowband amplifiers configured to separately support the downlink frequency and the uplink frequency.

4. The wireless transceiver of claim 1, wherein only one of the plurality of RF chain pairs is configured to switch the Tx frequency and the Rx frequency between the downlink frequency and the uplink frequency.

5. The wireless transceiver of claim 1, wherein each of the plurality of RF chain pairs is configured to switch the Tx frequency and the Rx frequency between the downlink frequency and the uplink frequency.

6. The wireless transceiver of claim 5, wherein all of the plurality of RF chain pairs are configured to be switched to the same Tx frequency and the same Rx frequency.

7. The wireless transceiver of claim 6, wherein each of the plurality of RF chain pairs comprises:

a first Tx/Rx band switch connected between a local oscillator pair and a mixer pair; and

a second Tx/Rx band switch connected between an amplifier pair and a duplexer,

wherein the plurality of RF chain pairs are arranged to share the first Tx/Rx band switch.

8. The wireless transceiver of claim 5, wherein each of the plurality of RF chain pairs is configured to be independently switched to the Tx frequency and to the Rx frequency.

9. The wireless transceiver of claim 8, wherein each of the plurality of RF chain pairs comprises:

a first Tx/Rx band switch connected between a local oscillator pair and a mixer pair; and

a second Tx/Rx band switch connected between an amplifier pair and a duplexer,

wherein each of the plurality of RF chain pairs independently comprises the first Tx/Rx band switch.

10. The wireless transceiver of claim 1, wherein the wireless transceiver is arranged within a relay station (RS) of a frequency division duplex (FDD) wireless communication system.

11. A method of operating a relay station (RS) for a frequency division duplex (FDD) wireless communication system, the method comprising:

receiving a first signal from a superordinate station on a downlink frequency and receiving a second signal from a subordinate station on an uplink frequency at the same time; and

transmitting a third signal to the superordinate station on the uplink frequency and transmitting a fourth signal to the subordinate station on the downlink frequency at the same time.

12. The method of claim 11, further comprising:

receiving a fifth signal from the superordinate station on the downlink frequency and transmitting a sixth signal to the superordinate station on the uplink frequency at the same time; and

transmitting a seventh signal to the subordinate station on the downlink frequency and receiving an eighth signal from the subordinate station on the uplink frequency at the same time.

13. The method of claim 12, further comprising:

selecting by the RS one of the first through fourth operations based on states of channels linked with the superordinate station and the subordinate station.

14. The method of claim 13, further comprising:

selecting by the RS one of the first through fourth operations so as to maximize a channel gain.

15. A method of operating a relay station (RS) for a frequency division duplex (FDD) wireless communication system, the RS having multiple antenna, the method comprising:

selecting by the RS a relaying mode between a superordinate station and a subordinate station from one of a transmission/reception (Tx/Rx) band switching based relaying mode and a dual-band Tx/Rx based relaying mode.

16. The method of claim 15, wherein a number of transport streams that are transmitted/received on each band when the RS operates in the Tx/Rx band switching based relaying mode is greater than or equal to a number of transport streams that are transmitted/received on each band when the RS operates in the dual-band Tx/Rx based relaying mode.

17. The method of claim 15, wherein a maximum number of transport streams that are transmitted/received on each band when the RS operates in the Tx/Rx band switching based relaying mode is two, and a maximum number of transport streams that are transmitted/received on each band when the RS operates in the dual-band Tx/Rx based relaying mode is one.

18. The method of claim 15, the step of selecting comprising:

selecting based on states of channels linked with the superordinate station and the subordinate station.

19. The method of claim 18, the step of selecting comprising:

selecting the relaying mode so as to maximize a channel gain.