Method and device for self-interference cancellation in wireless communication system

Patent metadata

Field	Value
Publication number	US-12501470-B2
Application number	US-202217727113-A
Country	US
Kind code	B2
Filing date	Apr 22, 2022
Priority date	Apr 23, 2021
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The disclosure provides a method performed by a user equipment (UE), the method comprises receiving, from a base station, data in a slot including a first signal transmission section and a second signal transmission section, identifying whether the received data includes a first data in the first signal transmission section for self-interference channel estimation of the base station, in case that the received data includes a first data in the first signal transmission section, decoding the first data using a first transmission scheme for the first signal transmission section, and in case that the data includes a second data in the second signal transmission section, decoding the second data using a second transmission scheme for the second signal transmission section.

First claim

What is claimed is:

1 . A method performed by a user equipment (UE), the method comprising:
receiving, from a base station, configuration information for self-interference channel estimation in the base station, the configuration information including bitmap information indicating where at least one symbol for the self-interference channel estimation is positioned and modified; receiving, from the base station, downlink data in a slot including a first signal transmission section and a second signal transmission section; identifying whether the received downlink data includes a first data in the first signal transmission section for the self-interference channel estimation in the base station, based on the configuration information; in case that the received downlink data includes the first data in the first signal transmission section, decoding the first data using a first transmission scheme for the first signal transmission section; and in case that the received downlink data includes a second data in the second signal transmission section, decoding the second data using a second transmission scheme for the second signal transmission section, wherein a number of one or more layers for the first transmission scheme is less than a number of two or more layers for the second transmission scheme, and wherein at least one symbol in the first signal transmission section is modified for the self-interference channel estimation in the slot, based on the bitmap information.

2 . The method of claim 1 , further comprising:
transmitting a first signal for self-interference channel estimation of the UE; and estimating a self-interference channel of the UE based on the first signal.

3 . The method of claim 2 , wherein the first signal is transmitted in an antenna port level of the UE, and
wherein the self-interference channel is estimated in the antenna port level of the UE.

4 . The method of claim 2 , wherein the first signal is transmitted in a layer level of the UE, and
wherein the self-interference channel is estimated in the layer level of the UE.

5 . The method of claim 2 , wherein the first signal is transmitted by the UE having up to a predetermined number of ports, and
wherein a number of ports used for transmission of the first signal is less than a number of ports used for transmission of a second signal which is transmitted from the UE to the base station.

6 . The method of claim 2 , wherein the first signal is transmitted from the UE having up to a predetermined number of layers, and
wherein a number of layers used for transmission of the first signal is less than a number of layers used for transmission of a second signal which is transmitted from the UE to the base station.

7 . A method performed by a base station, the method comprising:
transmitting, to a user equipment (UE), configuration information for self-interference channel estimation in the base station, the configuration information including bitmap information indicating where at least one symbol for the self-interference channel estimation is positioned and modified; identifying downlink data to be transmitted to the UE in a slot including a first signal transmission section for the self-interference channel estimation and a second signal transmission section, based on the configuration information; in case that the downlink data includes a first data in the first signal transmission section, transmitting the first data using a first transmission scheme for the first signal transmission section; and in case that the downlink data includes a second data in the second signal transmission section, transmitting the second data using a second transmission scheme for the second signal transmission section, wherein a number of one or more layers for the first transmission scheme is less than a number of two or more layers for the second transmission scheme, and wherein at least one symbol in the first signal transmission section is modified for the self-interference channel estimation in the slot, based on the bitmap information.

8 . The method of claim 7 , wherein the at least one symbol in
the second signal transmission section is not modified in a same manner as the modified at least one symbol among symbols in the slot.

9 . The method of claim 7 , further comprising:
receiving the first data for the self-interference channel estimation in the base station; estimating a self-interference channel based on the first data; and performing self-interference cancellation based on the estimated self-interference channel.

10 . The method of claim 9 , wherein the first data is transmitted in either an antenna port level or a layer level of the base station, and
wherein the self-interference channel is estimated in either the antenna port level or the layer level of the base station.

11 . The method of claim 9 , wherein the first data is transmitted from an antenna port level of the base station,
wherein the self-interference cancellation is performed before a combiner of the base station based on a value of the estimated self-interference channel in the antenna port level of the base station, and wherein the estimated self-interference channel is a channel of a signal passing through an analog beamformer of the base station.

12 . The method of claim 9 , wherein the first data is transmitted from a layer level of the base station,
wherein the self-interference cancellation is performed after a digital combiner of the base station based on a value of the estimated self-interference channel in the layer level of the base station, and wherein the estimated self-interference channel is a channel of a signal passing through an analog beamformer of the base station and the digital combiner of the base station.

13 . The method of claim 9 , wherein the first data is transmitted from the base station having up to a predetermined number of ports, and
wherein a number of ports used for transmission of the first data is less than a number of ports used for transmission of the second data.

14 . The method of claim 9 , wherein the first data is transmitted from the base station having up to a predetermined number of layers.

15 . The method of claim 9 , further comprising configuring antenna panels used for transmission of the first data,
wherein the antenna panels have a structure in which a plurality of antennas are arrayed, wherein a barrier rib structure is included between the antenna panels, and wherein the self-interference cancellation is performed at the barrier rib structure.

16 . A base station in a wireless communication system, the base station comprising:
a transceiver; and a processor configured to:
transmit, through the transceiver, to a user equipment (UE), configuration information for self-interference channel estimation in the base station, the configuration information including bitmap information indicating where at least one symbol for the self-interference channel estimation is positioned and modified,
identify downlink data to be transmitted to the UE in a slot including a first signal transmission section for the self-interference channel estimation and a second signal transmission section, based on the configuration information,
in case that the downlink data includes a first data in the first signal transmission section, transmit, through the transceiver, the first data using a first transmission scheme for the first signal transmission section, and
in case that the downlink data includes a second data in the second signal transmission section,

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lee Kwonjong
• Kim Youngjoon
• Lee Hyojin
• Lee Juho
• Choi Sunghyun

Classifications

• H04W72/1273

  of downlink data flows · CPC title

• H04L25/03292

  with channel estimation circuitry · CPC title

• H04L25/03286

  with channel-decoding circuitry · CPC title

• H04B7/0682

  using phase diversity (e.g. phase sweeping) · CPC title

• H04B7/0617

  for beam forming · CPC title