Method and device for estimating self- interference channel in wireless communication system

Patent metadata

Field	Value
Publication number	US-12438749-B2
Application number	US-202217854810-A
Country	US
Kind code	B2
Filing date	Jun 30, 2022
Priority date	Dec 23, 2021
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

The disclosure relates to a method and device for efficiently estimating a self-interference channel in a wireless communication system. A method for estimating a self-interference channel by a base station operating a plurality of sectors is provided. The method includes transmitting, in a self-interference channel estimation interval, a downlink signal in a sector among the plurality of sectors, and estimating an intra-sector self-interference channel caused by the downlink signal in the sector.

First claim

What is claimed is:

1. A method for estimating a self-interference channel by a base station operating a plurality of sectors, the method comprising:
transmitting, in a self-interference channel estimation interval, a downlink signal in a sector among the plurality of sectors;
estimating an intra-sector self-interference channel caused by the downlink signal in the sector;
transmitting, in the self-interference channel estimation interval, a downlink signal in a neighboring sector adjacent to the sector among the plurality of sectors; and
estimating an inter-sector self-interference channel caused by the downlink signal in the neighboring sector in the base station.

2. The method of claim 1 , further comprising:
canceling intra-sector self-interference based on the estimated intra-sector self-interference channel, and
canceling inter-sector self-interference based on the estimated inter-sector self-interference channel.

3. The method of claim 1 , further comprising:
configuring the self-interference channel estimation interval for estimation of the intra-sector self-interference channel and estimation of the inter-sector self-interference channel; and
transmitting information about the self-interference channel estimation interval to a user equipment (UE) in each sector,
wherein the information about the self-interference channel estimation interval includes information about a self-interference channel estimation symbol set.

4. The method of claim 3 , wherein uplink transmission by the UE is limited in the self-interference channel estimation interval.

5. The method of claim 1 ,
wherein the self-interference channel estimation interval is configured in at least one symbol in a slot, and
wherein in the self-interference channel estimation interval, the downlink signal in the sector and the downlink signal in the neighboring sector are transmitted in a time division multiplexing (TDM) scheme.

6. The method of claim 1 ,
wherein the self-interference channel estimation interval is configured in at least one symbol in a slot, and
wherein in the self-interference channel estimation interval, the downlink signal in the sector and the downlink signal in the neighboring sector are transmitted in a unit of a resource element (RE) in a frequency division multiplexing (FDM) scheme.

7. The method of claim 1 , further comprising:
sharing at least one of first information, second information, or third information between the plurality of sectors,
wherein the first information indicating whether self-interference channel estimation is necessary,
wherein the second information indicating a signal transmitted from each sector to perform the intra-sector self-interference channel estimation and the inter-sector self-interference channel estimation, and
wherein the third information indicating a resource position of the signal transmitted from each sector to perform the intra-sector self-interference channel estimation and the inter-sector self-interference channel estimation.

8. A base station operating a plurality of sectors, the base station comprising:
a transceiver including a plurality of antenna panels; and
at least one processor configured to:
transmit, in a self-interference channel estimation interval, a downlink signal in a sector among the plurality of sectors,
estimate an intra-sector self-interference channel caused by the downlink signal in the sector,
transmit, in the self-interference channel estimation interval, a downlink signal in a neighboring sector adjacent to the sector among the plurality of sectors, and
estimate an inter-sector self-interference channel caused by the downlink signal in the neighboring sector in the base station.

9. The base station of claim 8 , wherein the at least one processor is further configured to:
cancel intra-sector self-interference based on the estimated intra-sector self-interference channel, and
cancel inter-sector self-interference based on the estimated inter-sector self-interference channel.

10. The base station of claim 8 ,
wherein the at least one processor is further configured to:
configure the self-interference channel estimation interval for estimation of the intra-sector self-interference channel, and estimation of the inter-sector self-interference channel, and
transmit information about the self-interference channel estimation interval to a user equipment (UE) in each sector through the transceiver, and
wherein the information about the self-interference channel estimation interval includes information about a self-interference channel estimation symbol set.

11. The base station of claim 10 , wherein uplink transmission by the UE is limited in the self-interference channel estimation interval.

12. The base station of claim 8 ,
wherein the self-interference channel estimation interval is configured in at least one symbol in a slot, and
wherein in the self-interference channel estimation interval, the downlink signal in the sector and the downlink signal in the neighboring sector are transmitted in a time division multiplexing (TDM) scheme.

13. The base station of claim 8 ,
wherein the self-interference channel estimation interval is configured in at least one symbol in a slot, and
wherein in the self-interference channel estimation interval, the downlink signal in the sector and the downlink signal in the neighboring sector are transmitted in a unit of a resource element (RE) in a frequency division multiplexing (FDM) scheme.

14. The base station of claim 8 ,
wherein the at least one processor is further configured to share at least one of first information, second information, or third information between the plurality of sectors,
wherein the first information indicating whether self-interference channel estimation is necessary,
wherein the second information indicating a signal transmitted from each sector to perform the intra-sector self-interference channel estimation and the inter-sector self-interference channel estimation, and
wherein the third information indicating a resource position of the signal transmitted from each sector to perform the intra-sector self-interference channel estimation and the inter-sector self-interference channel estimation.

15. A method performed by a user equipment (UE) communicating with a base station operating a plurality of sectors, the method comprising:
receiving, from the base station, configuration information including information about a self-interference channel estimation interval in a sector where the UE belongs; and
performing data transmission or reception with the base station in a remaining uplink resource or downlink resource except for the self-interference channel estimation interval based on the configuration information,
wherein uplink transmission of the UE is limited in the self-interference channel estimation interval for estimation of a self-interference channel in the base station.

16. The method of claim 15 ,
wherein the information about the self-interference channel estimation interval includes information about a self-interference channel estimation symbol set,
wherein the self-interference channel estimation interval is configured in at least one symbol in a slot, and
wherein a downlink signal in each sector of the base station is received in a time division multiplexing (TDM) scheme or is received in a resource element (RE) unit in a frequency division multiplexing (FDM) scheme.

17. A user equipment (UE) communicating with a base station operating a plurality of sectors, the UE comprising:
a tra

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Sundo
• Lee Kwonjong
• Lee Juho
• Jung Jungsoo

Classifications

• H04W24/02 Primary

  Arrangements for optimising operational condition · CPC title

• H04J11/0023

  Interference mitigation or co-ordination (direct sequence spread spectrum [DSSS] systems H04B1/7097; frequency hopping H04B1/713; allocation criteria for ingress interference avoidance H04L5/0062; frequency allocation criteria for requirements on out-of-channel emissions H04L5/0066; arrangements for removing intersymbol interference or baseband equalisers H04L25/03006; peak power aspects in multicarrier modulation H04L27/2614; power management H04W52/00; traffic scheduling H04W72/54, H04W72/541) · CPC title

• H04L5/0032

  Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation · CPC title

• H04L25/0202 Primary

  Channel estimation · CPC title

• H04B17/345

  Interference values ({signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]} H04B17/336) · CPC title