Method and apparatus for estimating self-interference in wireless access system supporting full-duplex radio communication

• US 9,713,143 B2
• Filed: 06/23/2014
• Issued: 07/18/2017
• Est. Priority Date: 06/25/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Choi, Kukheon, Kim, Kitae, Chung, Jaehoon, Kim, Jinmin, Noh, Kwangseok
• Primary Examiner(s): Sciacca, Scott M
• Application Number:
  US14/899,498
• Publication Number:
  US 20160143013A1
• Time in Patent Office: 1,121 Days
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04J 13/0062 Zadoff-Chu
• CPC Class Codes: H04L 27/2607 Cyclic extensions
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource

Abstract

The present invention provides methods for estimating self-interference in a full-duplex radio (FDR) system using a reference signal to which a cyclic shift is applied, and apparatuses supporting the same. According to one embodiment of the present invention, a method for estimating a self-interference (SI) channel, by a base station, in a wireless access system supporting wireless FDR communication comprises the steps of: transmitting a channel signal including a first cyclic shift variable allocated to a terminal; transmitting a downlink (DL) self-interference reference signal (SI-RS) for estimating the SI channel generated on the basis of a second cyclic shift variable; receiving the DL SI-RS; receiving an uplink (UL) SI-RS generated on the basis of the first cyclic shift variable; and estimating the SI channel using the DL SI-RS and the UL SI-RS.

Claims

1. A method for estimating a self-interference (SI) channel in a wireless access system supporting full duplex radio (FDR) communication, the method performed by an evolved Node-B (eNB) and the method comprising:

transmitting a channel signal including a first cyclic shift variable allocated to a user equipment (UE);

transmitting a downlink (DL) self-interference reference signal (SI-RS) for estimating the SI channel, generated on the basis of a second cyclic shift variable;

receiving the DL SI-RS;

receiving an uplink (UL) SI-RS generated on the basis of the first cyclic shift variable; and

estimating the SI channel using the DL SI-RS and the UL SI-RS.

2. The method according to claim 1, wherein the second cyclic shift variable is a fixed value in the system, and the first cyclic shift variable is a value per UE.

3. The method according to claim 1, wherein the DL SI-RS and the UL SI-RS are transmitted through a same resource region in a specific subframe.

4. The method according to claim 1, wherein the DL SI-RS and the UL SI-RS are transmitted through different resource regions in a specific subframe.

5. The method according to claim 1, wherein the estimating of the SI channel is performed in consideration of one or more of a total number of cyclic shift variables, the first cyclic shift variable and the second cyclic shift variable.

6. A method for estimating, by a UE, an SI channel in a wireless access system supporting FDR communication, the method comprising:

receiving a channel signal including a first cyclic shift variable allocated to the UE;

transmitting a UL SI-RS generated on the basis of the first cyclic shift variable;

receiving the UL SI-RS;

receiving a DL SI-RS generated on the basis of a second cyclic shift variable; and

estimating the SI channel using the DL SI-RS and the UL SI-RS.

7. The method according to claim 6, wherein the second cyclic shift variable is a fixed value in the system, and the first cyclic shift variable is a value per UE.

8. The method according to claim 6, wherein the DL SI-RS and the UL SI-RS are transmitted through a same resource region in a specific subframe.

9. The method according to claim 6, wherein the DL SI-RS and the UL SI-RS are transmitted through different resource regions in a specific subframe.

10. The method according to claim 6, wherein the estimating of the SI channel is performed in consideration of one or more of a total number of cyclic shift variables, the first cyclic shift variable and the second cyclic shift variable.

11. An eNB for estimating an SI channel in a wireless access system supporting FDR communication, the eNB comprising:

a transmitter;

a receiver; and

a processor configured to estimate in connection with the transmitter and the receiver,

wherein the processor is configured to;

control the transmitter to transmit a channel signal including a first cyclic shift variable allocated to a UE and to transmit a DL SI-RS for estimating the SI channel, generated on the basis of a second cyclic shift variable;

control the receiver to receive the DL SI-RS and to receive a UL SI-RS generated on the basis of the first cyclic shift variable; and

estimate the SI channel using the DL SI-RS and the UL SI-RS.

12. The eNB according to claim 11, wherein the second cyclic shift variable is a fixed value in the system, and the first cyclic shift variable is a value per UE.

13. The eNB according to claim 11, wherein the DL SI-RS and the UL SI-RS are transmitted through a same resource region in a specific subframe.

14. The eNB according to claim 11, wherein the DL SI-RS and the UL SI-RS are transmitted through different resource regions in a specific subframe.

15. The eNB according to claim 11, wherein the SI channel is estimated in consideration of one or more of a total number of cyclic shift variables, the first cyclic shift variable and the second cyclic shift variable.