Granted Patent B2

US 12,382,462 · App. 16/964,298 · Granted Aug 5, 2025

Inventors: Seonwook Kim (Seoul, KR); Sukhyon Yoon (Seoul, KR); Hyunsoo Ko (Seoul, KR); Changhwan Park (Seoul, KR); Joonkui Ahn (Seoul, KR); Suckchel Yang (Seoul, KR)

Assignee: LG Electronics Inc.

H04W72/23H04B7/0408H04B7/0695H04L5/0094H04W16/28H04W56/001H04W72/0446H04W72/30

Abstract

Claims (47)

1. A method of receiving a downlink signal by a user equipment in a wireless communication system supporting an unlicensed band, the method comprising:

receiving information related to a synchronization signal/physical broadcast channel (SS/PBCH) block index for which transmission of a SS/PBCH block is configured in the unlicensed band;

configuring a plurality of candidate SS/PBCH block resource regions for receiving the SS/PBCH block in the unlicensed band, wherein the plurality of candidate SS/PBCH block resource regions are determined based on the SS/PBCH block index,

wherein a first candidate SS/PBCH block resource region among the plurality of candidate SS/PBCH block resource regions has an initial symbol at symbol index n=2, and a duration of the first candidate SS/PBCH block resource region is 4 symbols, and

wherein a second candidate SS/PBCH block resource region among the plurality of candidate SS/PBCH block resource regions has an initial symbol at symbol index n=9, and a duration of the second candidate SS/PBCH block resource region is 4 symbols;

receiving information in a physical downlink control channel (PDCCH) for scheduling a physical downlink shared channel (PDSCH) based on at least one control resource set (CORESET) in the unlicensed band, wherein the information informs a resource allocation for the PDSCH; and

receiving the PDSCH based on the information, wherein the PDSCH includes remaining minimum system information (RMSI),

wherein the user equipment assumes that resource blocks and symbols of a candidate SS/PBCH block resource region are not available for the PDSCH based on the resource allocation for the PDSCH overlapping with the resource blocks and the symbols of the candidate SS/PBCH block resource region,

wherein a first CORESET for the PDCCH among the at least one CORESET has an initial symbol at symbol index n=0, and a duration of the first CORESET is 2 symbols, and

wherein a second CORESET for the PDCCH among the at least one CORESET has an initial symbol at symbol index n=7, and a duration of the second CORESET is 2 symbols.

2. The method of claim 1 , wherein the user equipment assumes that the resource blocks and the symbols of the candidate SS/PBCH block resource region are not available for the PDSCH based on the resource allocation for the PDSCH overlapping with the resource blocks and the symbols of the candidate SS/PBCH block resource region, even when the SS/PBCH block is not transmitted on the resource blocks and the symbols of the candidate SS/PBCH block resource region.

3. The method of claim 1 , wherein the PDCCH is transmitted based on a channel access procedure.

4. The method of claim 1 , wherein the RMSI includes system information that is not transmitted in the SS/PBCH block.

5. The method of claim 1 , wherein the SS/PBCH block and the PDSCH are transmitted in the unlicensed band based on a single channel access procedure.

6. The method of claim 1 , wherein the unlicensed band is configured based on a subcarrier spacing of 15 or 30 kHz.

7. The method of claim 1 , wherein the PDCCH further includes information regarding whether there is a buffer flush for the RMSI.

8. The method of claim 1 , wherein the RMSI is related to the SS/PBCH block.

9. A method of transmitting a downlink signal by a base station in a wireless communication system supporting an unlicensed band, the method comprising:

transmitting information related to a synchronization signal/physical broadcast channel (SS/PBCH) block index for which transmission of a SS/PBCH block is configured in the unlicensed band;

configuring a plurality of candidate SS/PBCH block resource regions for transmitting the SS/PBCH block in the unlicensed band, wherein the plurality of candidate SS/PBCH block resource regions are determined based on the SS/PBCH block index,

wherein a first candidate SS/PBCH block resource region among the plurality of candidate SS/PBCH block resource regions has an initial symbol at symbol index n=2, and a duration of the first candidate SS/PBCH block resource region is 4 symbols, and

wherein a second candidate SS/PBCH block resource region among the plurality of candidate SS/PBCH block resource regions has an initial symbol at symbol index n=9, and a duration of the second candidate SS/PBCH block resource region is 4 symbols;

transmitting a physical downlink control channel (PDCCH) including information for scheduling a physical downlink shared channel (PDSCH) based on at least one control resource set (CORESET) in the unlicensed band, wherein the information informs a resource allocation for the PDSCH; and

transmitting the PDSCH based on the information, wherein the PDSCH includes remaining minimum system information (RMSI),

wherein resource blocks and symbols of a candidate SS/PBCH block resource region are not available for the PDSCH based on the resource allocation for the PDSCH overlapping with the resource blocks and the symbols of the candidate SS/PBCH block resource region,

wherein a first CORESET for the PDCCH among the at least one CORESET has an initial symbol at symbol index n=0, and a duration of the first CORESET is 2 symbols, and

wherein a second CORESET for the PDCCH among the at least one CORESET has an initial symbol at symbol index n=7, and a duration of the second CORESET is 2 symbols.

10. The method of claim 1 , wherein the user equipment is capable of communicating with at least one of another user equipment, a user equipment related to an autonomous driving vehicle, a base station and/or a network.

11. The method of claim 9 , wherein the resource blocks and the symbols of the candidate SS/PBCH block resource region are not available for the PDSCH based on the resource allocation for the PDSCH overlapping with the resource blocks and the symbols of the candidate SS/PBCH block resource region, even when the SS/PBCH block is not transmitted on the resource blocks and the symbols of the candidate SS/PBCH block resource region.

12. The method of claim 9 , wherein the PDCCH is transmitted based on a channel access procedure.

13. The method of claim 9 , wherein the RMSI includes system information that is not transmitted in the SS/PBCH block.

14. The method of claim 9 , wherein the SS/PBCH block and the PDSCH are transmitted in the unlicensed band based on a single channel access procedure.

15. The method of claim 9 , wherein the unlicensed band is configured based on a subcarrier spacing of 15 or 30 kHz.

16. The method of claim 9 , wherein the PDCCH further includes information regarding whether there is a buffer flush for the RMSI.

17. The method of claim 9 , wherein the RMSI is related to the SS/PBCH block.

18. A communication device for receiving a downlink signal in a wireless communication system supporting an unlicensed band, the communication device comprising:

a processor; and

a memory operably connected to the processor and storing instructions that, based on being executed by the processor, perform operations comprising:

receiving information related to a synchronization signal/physical broadcast channel (SS/PBCH) block index for which transmission of a SS/PBCH block is configured in the unlicensed band;

configuring a plurality of candidate SS/PBCH block resource regions for receiving the SS/PBCH block in the unlicensed band, wherein the plurality of candidate SS/PBCH block resource regions are determined based on the SS/PBCH block index,

wherein a first candidate SS/PBCH block resource region among the plurality of candidate SS/PBCH block resource regions has an initial symbol at symbol index n=2, and a duration of the first candidate SS/PBCH block resource region is 4 symbols, and

wherein a second candidate SS/PBCH block resource region among the plurality of candidate SS/PBCH block resource regions has an initial symbol at symbol index n=9, and a duration of the second candidate SS/PBCH block resource region is 4 symbols;

receiving information in a physical downlink control channel (PDCCH) for scheduling a physical downlink shared channel (PDSCH) based on at least one control resource set (CORESET) in the unlicensed band, wherein the information informs a resource allocation for the PDSCH; and

receiving the PDSCH based on the information, wherein the PDSCH includes remaining minimum system information (RMSI),

wherein the communication device assumes that resource blocks and symbols of a candidate SS/PBCH block resource region are not available for the PDSCH based on the resource allocation for the PDSCH overlapping with the resource blocks and the symbols of the candidate SS/PBCH block resource region,

wherein a first CORESET for the PDCCH among the at least one CORESET has an initial symbol at symbol index n=0, and a duration of the first CORESET is 2 symbols, and

wherein a second CORESET for the PDCCH among the at least one CORESET has an initial symbol at symbol index n=7, and a duration of the second CORESET is 2 symbols.

Assignments (1)

Priority Claims (3)

Continuity (2)

References Cited (28)