Granted Patent B2

US 12,284,689 · App. 18/468,660 · Granted Apr 22, 2025

Inventors: Ebrahim MolavianJazi (San Jose, CA); Aristides Papasakellariou (Houston, TX); Emad N. Farag (Flanders, NJ); Jeongho Jeon (San Jose, CA); Joonyoung Cho (Portland, OR)

Assignee: Samsung Electronics Co., Ltd.

H04W74/0841H04W24/08H04W72/0446H04W74/002H04W74/0866

Abstract

Claims (111)

1. A method comprising:

receiving first information for a first timing advance (TA) value corresponding to a first transmission configuration indication (TCI) state associated with one of:

first control resource sets (CORESETs) having a first CORESET pool index on a cell, or

a first cell;

receiving a physical downlink control channel (PDCCH) in a CORESET from the first CORESETs or from the first cell, wherein:

the PDCCH provides a downlink control information (DCI) format that triggers transmission of a first physical random access channel (PRACH), and

an indication in the DCI format is for one of:

a second CORESET pool index, or

a second cell;

transmitting the first PRACH; and

receiving, in response to the first PRACH, a random access response (RAR), wherein the RAR includes information for a second TA value corresponding to a second TCI state associated with one of:

second CORESETs having the second CORESET pool index on the cell, or

the second cell.

2. The method of claim 1 , further comprising transmitting:

a first channel or signal with a first spatial filter corresponding to the first TCI state based on the first TA value, and

a second channel or signal with a second spatial filter corresponding to the second TCI state based on the second TA value.

3. The method of claim 1 , wherein:

the first TCI state is associated with the first CORESETs that are further associated with a first timing advance group (TAG), and

the second TCI state is associated with the second CORESETs that are further associated with a second TAG.

4. The method of claim 1 , further comprising:

receiving:

a first group of downlink reference signals (DL RSs) associated with the first CORESETs, and

a second group of DL RSs associated with the second CORESETs, wherein:

the indication in the DCI format is for an index of a DL RS from the second group of DL RSs, and

the DL RSs include synchronization signal and physical broadcast channel (SS/PBCH) blocks of the cell.

5. The method of claim 1 , wherein the first-indication in the DCI format is for a physical cell identity (PCI) associated with the second cell.

6. The method of claim 1 , further comprising:

determining parameters for transmission of a second PRACH on the second cell;

receiving information for transmission of a first channel or signal on the first cell;

determining that the second PRACH transmission:

would overlap in time with the first channel or signal transmission, or

would have a gap in time with the first channel or signal transmission that is smaller than a threshold; and

transmitting only one of:

the second PRACH, and

the first channel or signal.

7. The method of claim 1 , wherein a pathloss reference for the first PRACH transmission is a downlink reference signal (DL RS) associated with the second TCI state.

8. A user equipment (UE) comprising:

a transceiver configured to:

receive first information for a first timing advance (TA) value corresponding to a first transmission configuration indication (TCI) state associated with one of:

first control resource sets (CORESETs) having a first CORESET pool index on a cell, or

a first cell;

receive a physical downlink control channel (PDCCH) in a CORESET from the first CORESETs or from the first cell, wherein:

the PDCCH provides a downlink control information (DCI) format that triggers transmission of a first physical random access channel (PRACH), and

an indication in the DCI format is for one of:

a second CORESET pool index, or

a second cell;

transmit the first PRACH; and

receive, in response to the first PRACH, a random access response (RAR); and

a processor operably coupled with the transceiver, the processor configured to identify, in the RAR, information for a second TA value corresponding to a second TCI state associated with one of:

second CORESETs having the second CORESET pool index on the cell, or

the second cell.

9. The UE of claim 8 , wherein the transceiver is further configured to transmit:

a first channel or signal with a first spatial filter corresponding to the first TCI state based on the first TA value, and

a second channel or signal with a second spatial filter corresponding to the second TCI state based on the second TA value.

10. The UE of claim 8 , wherein:

the first TCI state is associated with the first CORESETs that are further associated with a first timing advance group (TAG), and

the second TCI state is associated with the second CORESETs that are further associated with a second TAG.

11. The UE of claim 8 , wherein:

the transceiver is further configured to receive:

a first group of downlink reference signals (DL RSs) associated with the first CORESETs, and

a second group of DL RSs associated with the second CORESETs,

the indication in the DCI format is for an index of a DL RS from the second group of DL RSs, and

the DL RSs include synchronization signal and physical broadcast channel (SS/PBCH) blocks of the cell.

12. The UE of claim 8 , wherein the first-indication in the DCI format is for a physical cell identity (PCI) associated with the second cell.

13. The UE of claim 8 , wherein:

the processor is further configured to determine parameters for transmission of a second PRACH on the second cell;

the transceiver is further configured to receive information for transmission of a first channel or signal on the first cell;

the processor is further configured to determine that the second PRACH transmission:

would overlap in time with the first channel or signal transmission, or

would have a gap in time with the first channel or signal transmission that is smaller than a threshold; and

the transceiver is further configured to transmit only one of:

the second PRACH, and

the first channel or signal.

14. The UE of claim 8 , wherein a pathloss reference for the first PRACH transmission is a downlink reference signal (DL RS) associated with the second TCI state.

15. A base station comprising:

a transceiver configured to;

transmit first information for a first timing advance (TA) value corresponding to a first transmission configuration indication (TCI) state associated with one of:

first control resource sets (CORESETs) having a first CORESET pool index on a cell, or

a first cell;

transmit a physical downlink control channel (PDCCH) in a CORESET from the first CORESETs or from the first cell, wherein:

the PDCCH provides a downlink control information (DCI) format that triggers a first physical random access channel (PRACH), and

an indication in the DCI format is for one of:

a second CORESET pool index, or

a second cell;

receive the first PRACH; and

transmit, in response to the first PRACH, a random access response (RAR) including information for a second TA value; and

a processor operably coupled with the transceiver, the processor configured to identify the second TA value for reception of a second channel or signal with a second spatial filter corresponding to a second TCI state associated with one of:

second CORESETs having the second CORESET pool index on the cell, or

the second cell.

16. The base station of claim 15 , wherein:

the first TCI state is associated with the first CORESETs that are further associated with a first timing advance group (TAG), and

the second TCI state is associated with the second CORESETs that are further associated with a second TAG.

17. The base station of claim 15 , wherein:

the transceiver is further configured to transmit:

a first group of downlink reference signals (DL RSs) associated with the first CORESETs, and

a second group of DL RSs associated with the second CORESETs,

the first indication in the DCI format is for an index of a DL RS from the second group of DL RSs, and

the DL RSs include synchronization signal and physical broadcast channel (SS/PBCH) blocks of the cell.

18. The base station of claim 15 , wherein the first indication in the DCI format is for a physical cell identity (PCI) associated with the second cell.

19. The base station of claim 15 , wherein:

the processor is further configured to determine parameters for reception of a second PRACH;

the transceiver is further configured to transmit information for a first channel or signal on the first cell;

the processor is further configured to determine that the second PRACH reception:

would overlap in time with the first channel or signal reception, or

would have a gap in time with the first channel or signal reception that is smaller than a threshold; and

the transceiver is further configured to receive only one of:

the second PRACH, and

the first channel or signal.

20. The base station of claim 15 , wherein the transceiver is further configured to receive:

a first channel or signal with a first spatial filter corresponding to the first TCI state based on the first TA value, and

a second channel or signal with a second spatial filter corresponding to the second TCI state based on the second TA value.

Assignments (1)

Continuity (5)

References Cited (41)