Method for stably operating fdr mode in wireless communication system supporting fdr mode, and device for same

Patent metadata

Field	Value
Publication number	US-2018123710-A1
Application number	US-201515566683-A
Country	US
Kind code	A1
Filing date	Nov 12, 2015
Priority date	Apr 17, 2015
Publication date	May 3, 2018
Grant date	—

Abstract

A method for stably operating an FDR mode by a terminal in a wireless communication system supporting the full-duplex radio (FDR) mode comprises the steps of: if a residual self-interference signal is changed to a predetermined threshold or higher in a terminal, transmitting information about the changed residual self-interference signal to a base station; and receiving from the base station a downlink signal on the basis of a modulation and coding scheme (MCS) level that corresponds to the information about the changed residual self-interference signal.

First claim

What is claimed is:

1 . A method for stably operating a full-duplex radio (FDR) mode by a user equipment (UE) in a wireless communication system supporting the FDR mode, the method comprising:
when a residual self-interference signal is changed that the residual self-interference signal is equal to or greater than a predetermined threshold in the UE, transmitting information on a changed residual self-interference signal to a base station; and receiving a downlink signal from the base station based on a modulation and coding scheme (MCS) level corresponding to the information on the changed residual self-interference signal.

2 . The method according to claim 1 , wherein the information on the changed residual self-interference signal includes a value of a strength of the changed residual self-interference signal.

3 . The method according to claim 1 , wherein the information on the changed residual self-interference signal includes a margin value of the MCS level.

4 . The method according to claim 3 , further comprising:
calculating the margin value of the MCS level based on the value of the strength of the changed residual self-interference signal.

5 . The method according to claim 3 , wherein the margin value of the MCS level is a negative value if the strength of the changed residual self-interference signal is increased and is a positive value if the strength of the changed residual self-interference signal is decreased.

6 . The method according to claim 1 , wherein the information on the changed residual self-interference signal is transmitted only when an absolute value of transmit power of the UE is equal to or greater than a predetermined threshold.

7 . The method according to claim 1 , further comprising:
receiving information on the MCS level corresponding to the information on the changed residual self-interference signal from the base station.

8 . The method according to claim 1 , wherein the margin value of the MCS level corresponds to a difference from a previously used MCS level in a predetermined MCS level table.

9 . A user equipment (UE) for stably operating a full-duplex radio (FDR) mode in a wireless communication system supporting the FDR mode, the UE comprising:
a transmitter configured to transmit information on a changed residual self-interference signal to a base station when a residual self-interference signal is changed that the residual self-interference signal is equal to or greater than a predetermined threshold or in the UE; and a receiver configured to receive a downlink signal from the base station based on a modulation and coding scheme (MCS) level corresponding to the information on the changed residual self-interference signal.

10 . The UE according to claim 9 , wherein the information on the changed residual self-interference signal includes a value of a strength of the changed residual self-interference signal.

11 . The UE according to claim 9 , wherein the information on the changed residual self-interference signal includes a margin value of the MCS level.

12 . The UE according to claim 11 , further comprising a processor configured to calculate the margin value of the MCS level based on the value of the strength of the changed residual self-interference signal.

13 . The UE according to claim 9 , wherein the transmitter transmits the information on the changed residual self-interference signal only when an absolute value of transmit power of the UE is equal to or greater than a predetermined threshold.

14 . The UE according to claim 9 , wherein the receiver further receives information on the MCS level corresponding to the information on the changed residual self-interference signal from the base station.

15 . The UE according to claim 9 , wherein the margin value of the MCS level corresponds to a difference from a previously used MCS level in a predetermined MCS level table.

Assignees

• Lg Electronics Inc

Inventors

• Kim Dongkyu
• Ko Hyunsoo
• Noh Kwangseok
• Lee Sangrim
• Lee Hojae

Classifications

• H04L1/0015

  characterised by the adaptation strategy · CPC title

• H04B1/525

  with means for reducing leakage of transmitter signal into the receiver · CPC title

• H04B1/12

  Neutralising, balancing, or compensation arrangements · CPC title

• H04B17/24

  with feedback of measurements to the transmitter · CPC title

• H04L1/00

  Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)} · CPC title