Method and apparatus for transmitting and receiving sidelink information in unlicensed band in frame-based channel access method

Patent metadata

Field	Value
Publication number	US-12588041-B2
Application number	US-202318365095-A
Country	US
Kind code	B2
Filing date	Aug 3, 2023
Priority date	Aug 3, 2022
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a user equipment (UE) in a communication system includes obtaining one or more configurations for a fixed frame period (FFP) and an offset associated with a frame-based channel access, identifying a configuration for the FFP and the offset among the one or more configurations, identifying idle duration corresponding to the FFP associated with the configuration, and transmitting a sidelink channel in consideration of the idle duration.

First claim

What is claimed is:

1 . A method performed by a user equipment (UE) in a communication system, the method comprising:
obtaining one or more configurations for a fixed frame period (FFP) and an offset associated with a frame-based channel access; identifying a configuration for the FFP and the offset among the one or more configurations based on geographic information of the UE; identifying an idle duration corresponding to the FFP associated with the configuration; and transmitting a sidelink channel in consideration of the idle duration, wherein the offset is based on an absolute length value in case that a subcarrier spacing of the sidelink channel is 15 kHz and the FFP is 1 ms, wherein the offset is based on a symbol unit value in case that the subcarrier spacing of the sidelink channel is 30 kHz and the FFP is 1 ms, wherein one or more guard symbols are mapped to the idle duration based on the offset, and wherein the sidelink channel is not transmitted on the guard symbols.

2 . The method of claim 1 , wherein, in case that a first physical sidelink feedback channel (PSFCH) associated with feedback information overlaps with the idle duration, the feedback information is transmitted based on at least one of:
a physical sidelink control channel (PSCCH); a physical sidelink shared channel (PSSCH); or a second PSFCH, wherein the second PSFCH does not overlap with the idle duration.

3 . The method of claim 1 , wherein, in case that a physical sidelink control channel (PSCCH) or a physical sidelink shared channel (PSSCH) overlaps with the idle duration, the PSCCH or the PSSCH is not transmitted.

4 . The method of claim 1 , wherein, in case that a sidelink synchronization signal block (S-SSB) overlaps with the idle duration, the S-SSB is not transmitted.

5 . The method of claim 1 , wherein, in case that a sidelink synchronization signal block (S-SSB) overlaps with the idle duration, the S-SSB is transmitted.

6 . The method of claim 1 , wherein a resource for the sidelink channel is allocated so as not to overlap with the idle duration.

7 . The method of claim 1 , wherein, in case that a subcarrier spacing (SCS) is 15 kHz and the FFP is 1 ms, the FFP is defined based on one slot, and the one slot includes the idle duration, wherein the idle duration is 100 μs.

8 . The method of claim 1 , wherein, in case that a subcarrier spacing (SCS) is 30 kHz and the FFP is 1 ms, the FFP is defined based on two slots and the two slots include the idle duration, wherein the idle duration is 100 μs.

9 . The method of claim 1 , further comprising transmitting information on a channel occupancy time (COT), and wherein the idle duration is associated with the information on the COT.

10 . A user equipment (UE) in a communication system, the UE comprising:
a transceiver; and a controller operatively coupled to the transceiver configured to:
obtain one or more configurations for a fixed frame period (FFP) and an offset associated with a frame-based channel access;
identify a configuration for the FFP and the offset among the one or more configurations based on geographic information of the UE; and
identify an idle duration corresponding to the FFP associated with the configuration,
wherein the transceiver is configured to transmit a sidelink channel in consideration of the idle duration, wherein the offset is based on an absolute length value in case that a subcarrier spacing of the sidelink channel is 15 kHz and the FFP is 1 ms, wherein the offset is based on a symbol unit value in case that the subcarrier spacing of the sidelink channel is 30 kHz and the FFP is 1 ms, wherein one or more guard symbols are mapped to the idle duration based on the offset, and wherein the sidelink channel is not transmitted on the guard symbols.

11 . The UE of claim 10 , wherein, in case that a first physical sidelink feedback channel (PSFCH) associated with feedback information overlaps with the idle duration, the feedback information is transmitted based on at least one of:
a physical sidelink control channel (PSCCH); a physical sidelink shared channel (PSSCH); or a second PSFCH, wherein the second PSFCH does not overlap with the idle duration.

12 . The UE of claim 10 , wherein, in case that a physical sidelink control channel (PSCCH) or a physical sidelink shared channel (PSSCH) overlaps with the idle duration, the PSCCH or the PSSCH is not transmitted.

13 . The UE of claim 10 , wherein, in case that a sidelink synchronization signal block (S-SSB) overlaps with the idle duration, the S-SSB is not transmitted.

14 . The UE of claim 10 , wherein, in case that a sidelink synchronization signal block (S-SSB) overlaps with the idle duration, the S-SSB is transmitted.

15 . The UE of claim 10 , wherein a resource for the sidelink channel is allocated so as not to overlap with the idle duration.

16 . The UE of claim 10 , wherein, in case that a subcarrier spacing (SCS) is 15 kHz and the FFP is 1 ms, the FFP is defined based on one slot, and the one slot includes the idle duration, wherein the idle duration is 100 μs.

17 . The UE of claim 10 , wherein, in case that a subcarrier spacing (SCS) is 30 kHz and the FFP is 1 ms, the FFP is defined based on two slots and the two slots include the idle duration, wherein the idle duration is 100 μs.

18 . The UE of claim 10 , wherein the transceiver is further configured to transmit information on a channel occupancy time (COT), and wherein the idle duration is associated with the information on the COT.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Park Sungjin
• Ryu Hyunseok
• Yang Hyewon
• Lee Jaewon

Classifications

• H04W16/14 Primary

  Spectrum sharing arrangements {between different networks} · CPC title

• H04W74/0808

  using carrier sensing, e.g. carrier sense multiple access [CSMA] · CPC title

• H04W74/0875

  with assigned priorities based access · CPC title

• H04W74/002

  Transmission of channel access control information · CPC title

• H04W4/40

  for vehicles, e.g. vehicle-to-pedestrians [V2P] · CPC title