Method and apparatus for indicating slot format in wireless communication system

Patent metadata

Field	Value
Publication number	US-11832265-B2
Application number	US-202017106665-A
Country	US
Kind code	B2
Filing date	Nov 30, 2020
Priority date	Nov 28, 2019
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

A method is provided for a user equipment (UE) to obtain slot format information. The method includes receiving, from a base station (BS), configuration information about a physical downlink control channel (PDCCH); detecting downlink control information (DCI), based on the configuration information; obtaining slot format indicator (SFI) information and information about a channel occupancy time (COT) in the DCI; and determining a slot or a symbol to which the SFI information is to be applied, based on the information about the COT.

First claim

What is claimed is:

1. A method, performed by a user equipment (UE), the method comprising:
receiving, from a base station (BS), configuration information including a plurality of reserved values regarding at least one slot format indicator (SFI);
receiving, on a first cell, downlink control information (DCI) including an SFI field and a channel occupancy time (COT) field for a second cell;
in case that a value of the SFI field corresponds to one of the plurality of reserved values included in the configuration information,
identifying at least one symbol outside a COT, among a plurality of symbols, based on the COT field; and
in case that a higher layer parameter indicating to perform sounding reference signal (SRS) transmission on the at least one symbol outside the COT is configured, transmitting an SRS on the at least one symbol outside the COT.

2. The method of claim 1 , further comprising:
in case that a higher layer parameter indicating to perform a channel access procedure on the at least one symbol outside the COT is configured performing the channel access procedure on the at least one symbol outside the COT.

3. The method of claim 1 , further comprising:
receiving a downlink data channel or a channel state information reference signal (CSI-RS), on the at least one symbol side the COT, based on other DCI different from the received DCI.

4. The method of claim 1 , wherein the SFI field indicates a slot format in a unit of a slot, and
wherein the COT field indicates the COT in a unit of a symbol.

5. The method of claim 1 , wherein the SFI field further includes information indicating that a slot or the at least one symbol outside the COT is a flexible slot or a flexible symbol.

6. A method, performed by a base station (BS), the method comprising:
transmitting, to a user equipment (UE), configuration information including a plurality of reserved values regarding at least one slot format indicator (SFI); and
transmitting, on a first cell, downlink control information (DCI) including an SFI field and a channel occupancy time (COT) field for a second cell, to the UE,
wherein, in case that a value of the SFI field corresponds to one of the plurality of reserved values included in the configuration information, at least one symbol outside a COT, among a plurality of symbols, is identified at the UE based on the COT field, and
wherein, in case that a higher layer parameter indicating to perform sounding reference signal (SRS) transmission on the at least one symbol outside the COT is configured, an SRS is transmitted on the at least one symbol outside the COT.

7. The method of claim 6 , wherein the SFI field indicates a slot format in a unit of a slot, and
wherein the COT field indicates the COT in a unit of a symbol.

8. A user equipment (UE) comprising:
a transceiver; and
a processor coupled with the transceiver and configured to:
receive, from a base station (BS), configuration information including a plurality of reserved values regarding at least one slot format indicator (SFI),
receive, on a first cell, downlink control information (DCI) including thean SFI field and a channel occupancy time (COT) field for a second cell,
in case that a value of the SFI field corresponds to one of the plurality of reserved values included in the configuration information,
identify at least one symbol outside a COT, among a plurality of symbols, based on the COT field, and
in case that a higher layer parameter indicating to perform sounding reference signal (SRS) transmission on the at least one symbol outside the COT is configured, transmit an SRS on the at least one symbol outside the COT.

9. The UE of claim 8 , wherein the processor is further configured to:
in case that a higher layer parameter indicating to perform a channel access procedure on the at least one symbol outside the COT is configured, perform the channel access procedure on the at least one symbol outside the COT.

10. The UE of claim 8 , wherein the processor is further configured to receive a downlink data channel or a channel state information reference signal (CSI-RS) on the at least one symbol outside the COT, based on other DCI different from the received DCI.

11. The UE of claim 8 , wherein the SFI field indicates a slot format in a unit of a slot, and
wherein the COT field indicates the COT in a unit of a symbol.

12. The UE of claim 8 , wherein the SFI field further includes information indicating that a slot or the at least one symbol outside the COT is a flexible slot or a flexible symbol.

13. A base station (BS), comprising:
a transceiver; and
a processor configured to:
transmit, to a user equipment (UE), configuration information including a plurality of values regarding at least one slot format indicator (SFI), and
transmit, on a first cell, downlink control information (DCI) including an SFI field and a channel occupancy time (COT) field for a second cell, to the UE,

wherein, in case that a value of the SFI field corresponds to one of the plurality of reserved values included in the configuration information, at least one symbol outside a COT, among a plurality of symbols, is identified at the UE based on the COT field, and
wherein, in case that a higher layer parameter indicating to perform sounding reference signal (SRS) transmission on the at least one symbol outside the COT is configured, an SRS is transmitted on the at least one symbol outside the COT.

14. The BS of claim 13 , wherein the SFI field indicates a slot format in a unit of a slot, and
wherein the COT field indicates the COT in a unit of a symbol.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Oh Jinyoung
• Kim Taehyoung
• Bang Jonghyun
• Bae Taehan
• Yeo Jeongho

Classifications

• H04L5/0053 Primary

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04W72/232

  the control data signalling from the physical layer, e.g. DCI signalling · CPC title

• H04W72/23 Primary

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04W16/14

  Spectrum sharing arrangements {between different networks} · CPC title