INTERFERENCE CANCELLATION METHOD AND APPARATUS BETWEEN TERMINALS IN WIRELESS ACCESS SYSTEM SUPPORTING FULL-DUPLEX RADIO SCHEME

• US 20160249245A1
• Filed: 10/10/2014
• Published: 08/25/2016
• Est. Priority Date: 10/10/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: KIM, Jinmin, CHUNG, Jaehoon, KIM, Kitae, CHOI, Kukheon, NOH, Kwangseok
• Granted Patent: US 10,390,254 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04L 5/16 Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
• CPC Class Codes: H04W 28/0236 radio quality, e.g. interference, losses or delay
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention relates to methods for interference cancellation between terminals in a full-duplex radio (FDR) system and apparatuses supporting the same. A method for cancelling interference between terminals in a wireless access system supporting a full-duplex radio (FDR) system, as an aspect of the present invention, may comprise the steps of: receiving, by a first terminal, reference signal information including information for configuring an interference reference signal from a base station; receiving the interference reference signal from a second terminal; obtaining, by the first terminal, interference channel information with regard to an interference channel between the first terminal and the second terminal on the basis of the interference reference signal; and transmitting by beamforming uplink data to the base station on the basis of the interference channel information by the first terminal. In this case, the first terminal is supported by the FDR system and the second terminal supports the half-duplex radio (HDR) system, and a resource area transmitting uplink data by the first terminal can be configured to match a resource area receiving downlink data by the second terminal.

Claims

1. A method for cancelling interference between UEs in a wireless access system supporting a full-duplex radio (FDR) system, the method comprising:

receiving, by a first UE from a base station, reference signal information including information for configuring an interference reference signal;

receiving the interference reference signal from a second UE;

acquiring, by the first UE, interference channel information on an interference channel between the first UE and the second UE on the basis of the interference reference signal; and

transmitting, by the first UE, uplink data to the base station on the basis of the interference channel information by performing beamforming for the uplink data,

wherein the first UE supports the FDR system and the second UE supports a half-duplex radio (HDR) system, and

wherein a resource region where the first UE transmits the uplink data corresponds to a resource region where the second UE receives downlink data.

2. The method according to claim 1, wherein the reference signal information includes at least one of type information of the interference reference signal, timing information indicating when the interference reference signal is transmitted, and resource region information on a frequency domain to which the interference reference signal is transmitted.

3. The method according to claim 1, wherein the first UE transmits the uplink data by performing null space projection on the basis of the interference channel information.

4. The method according to claim 1, wherein the interference reference signal is transmitted to an uplink through only a partial band not a full system band.

5. The method according to claim 1, further comprising:

receiving indication information in the first UE, the indication information indicating that the interference reference signal is transmitted.

6. A first UE for supporting cancellation of interference between UEs in a wireless access system supporting a full-duplex radio (FDR) system, the first UE comprising:

a transmitter;

a receiver; and

a processor for supporting cancellation of interference between UEs by controlling the transmitter and the receiver,

wherein the processor is configured to receive reference signal information including information for configuring an interference reference signal, from a base station by controlling the receiver, receive the interference reference signal from a second UE by controlling the receiver, acquire interference channel information on an interference channel between the first UE and the second UE on the basis of the interference reference signal and transmit uplink data to the base station on the basis of the interference channel information by performing beamforming for the uplink data by controlling the transmitter,

the first UE supports the FDR system and the second UE supports a half-duplex radio (HDR) system, and

a resource region where the first UE transmits the uplink data corresponds to a resource region where the second UE receives downlink data.

7. The first UE according to claim 6, wherein the reference signal information includes at least one of type information of the interference reference signal, timing information indicating when the interference reference signal is transmitted, and resource region information on a frequency domain to which the interference reference signal is transmitted.

8. The first UE according to claim 6, wherein the first UE transmits the uplink data by performing null space projection on the basis of the interference channel information.

9. The first UE according to claim 6, wherein the interference reference signal is transmitted to an uplink through only a partial band not a full system band.

10. The first UE according to claim 6, wherein the processor is further configured to receive indication information, which indicates that the interference reference signal is transmitted, by controlling the receiver.