Granted Patent B2

US 12,396,007 · App. 17/955,492 · Granted Aug 19, 2025

Inventors: Hoda Shahmohammadian (San Diego, CA); Jung Hyun Bae (San Diego, CA)

Assignee: SAMSUNG ELECTRONICS CO., LTD.

H04W72/231H04L5/0053H04W72/12

Abstract

Claims (60)

1. A method of determining a default Transmission Configuration Indicator (TCI) state for a User Equipment (UE) in a wireless communication network, the method comprising:

determining, by the UE, that wireless communication is being carried out in Frequency Range 2 (FR2);

receiving, by the UE, one or more Core Resource Sets (CORESETs) carrying a Physical Downlink Control Channel (PDCCH) with a Downlink Control Information (DCI);

determining, by the UE, that a time offset between reception by the UE of the DCI and a corresponding Physical Downlink Shared Channel (PDSCH) is less than a predetermined time threshold;

determining, by the UE, that the PDSCH is configured with a Single Frequency Network (SFN) scheme;

determining, by the UE, that an option to enable two default TCI states for the UE is not configured;

determining, by the UE, whether the PDCCH is configured with an SFN scheme;

based on a result of determining whether the PDCCH is configured with an SFN scheme, determining, by the UE, a default TCI state for PDSCH reception; and

receiving, by the UE, the PDSCH using the determined default TCI state.

2. The method of claim 1 , wherein the UE determines that the PDCCH is configured with an SFN scheme, and the default TCI state for PDSCH is determined based on one or more of the CORESETs with a single TCI state.

3. The method of claim 1 , wherein the UE determines that the PDCCH is configured with an SFN scheme, and the default TCI state for PDSCH reception is determined based on a reference TCI state selected from TCI states of the CORESETs.

4. The method of claim 1 , wherein the UE determines that the PDCCH is not configured with an SFN scheme, and the default TCI state for PDSCH reception is determined based on a TCI state of a CORESET with a lowest CORESET index.

5. The method of claim 1 , wherein the time offset between reception of the DCI and the corresponding PDSCH is less than a time duration for a minimum number of Orthogonal Frequency-Division Multiplexed (OFDM) symbols for the UE to perform Physical Downlink Control Channel (PDCCH) reception and apply spatial Quasi-Colocation information received in the DCI for PDSCH processing.

6. A method of determining a default Transmission Configuration Indicator (TCI) state for a User Equipment (UE) in a wireless communication network, the method comprising:

determining, by the UE, that wireless communication is being carried out in Frequency Range 2 (FR2);

receiving, by the UE, one or more Core Resource Sets (CORESETs) including a scheduling CORESET carrying a Physical Downlink Control Channel (PDCCH) with a Downlink Control Information (DCI);

determining, by the UE, that a time offset between reception by the UE of the DCI and a corresponding Physical Downlink Shared Channel (PDSCH) is equal to or greater than a predetermined time threshold;

determining, by the UE, that a TCI state indicator is not present in the DCI;

determining, by the UE, whether the PDSCH is configured with a Single Frequency Network (SFN) scheme;

determining, by the UE, whether the PDCCH is configured with an SFN scheme;

based on a result of determining whether the PDSCH is configured with an SFN scheme and a result of determining whether the PDCCH is configured with an SFN scheme, determining, by the UE, a default TCI state for PDSCH reception; and

receiving, by the UE, the PDSCH using the determined default TCI state.

7. The method of claim 6 , further comprising:

determining, by the UE, that two default TCI states are configurable for the UE, wherein:

the UE determines that the PDSCH is configured with an SFN scheme and the PDCCH is configured with an SFN scheme, and

the default TCI state for PDSCH reception is determined to comprise two TCI states of the scheduling CORESET.

8. The method of claim 6 , further comprising:

determining, by the UE, that only one default TCI state is configurable for the UE, wherein:

the UE determines that the PDSCH is configured with an SFN scheme and the PDCCH is configured with an SFN scheme, and

the default TCI state for PDSCH reception is determined based on one TCI state of the scheduling CORESET.

9. The method of claim 8 , wherein:

the one TCI state of the scheduling CORESET is predetermined or semi-statically indicated to the UE as a reference TCI state to be used to determine the default TCI state for PDSCH reception.

10. The method of claim 6 , wherein:

the UE determines that the PDSCH is configured with an SFN scheme and the PDCCH is not configured with an SFN scheme, and

the default TCI state for PDSCH reception is determined based on a TCI state of the scheduling CORESET.

11. The method of claim 6 , wherein:

the UE determines that the PDSCH is not configured with an SFN scheme and the PDCCH is configured with an SFN scheme, and

the default TCI state for PDSCH reception is determined based on a TCI state of the scheduling CORESET that is predetermined or semi-statically indicated to the UE as a reference TCI state to be used to determine the default TCI state for PDSCH reception.

12. The method of claim 6 , wherein:

the UE determines that the PDSCH is not configured with an SFN scheme and the PDCCH is not configured with an SFN scheme, and

the default TCI state for PDSCH reception is determined to be an active TCI state of a CORESET with a lowest controlResourceSetId in a latest slot.

13. A method of determining a default Transmission Configuration Indicator (TCI) state for a User Equipment (UE) in a wireless communication network, the method comprising:

determining, by the UE, that wireless communication is being carried out in Frequency Range 1 (FR1);

receiving, by the UE, one or more Core Resource Sets (CORESETs) including a scheduling CORESET carrying a Physical Downlink Control Channel (PDCCH) with a Downlink Control Information (DCI);

determining, by the UE, that a TCI state indictor is not present in the DCI;

determining, by the UE, whether the PDSCH is configured with a Single Frequency Network (SFN) scheme;

determining, by the UE, whether the PDCCH is configured with an SFN scheme;

based on a result of determining whether the PDSCH is configured with an SFN scheme and a result of determining whether the PDCCH is configured with an SFN scheme, determining, by the UE, a default TCI state for PDSCH reception; and

receiving, by the UE, the PDSCH using the determined default TCI state.

14. The method of claim 13 , wherein:

the UE determines that the PDSCH is configured with an SFN scheme and the PDCCH is configured with an SFN scheme, and

the default TCI state for PDSCH reception is determined to comprise two TCI states of the scheduling CORESET.

15. The method of claim 13 , wherein:

the UE determines that the PDSCH is not configured with an SFN scheme and the PDCCH is configured with an SFN scheme, and

the default TCI state for PDSCH reception is determined based on one TCI state of the scheduling CORESET.

16. The method of claim 15 , wherein:

the one TCI state of the scheduling CORESET is predetermined or semi-statically indicated to the UE as a reference TCI state to be used to determine the default TCI state for PDSCH reception.

17. The method of claim 16 , wherein:

the UE determines that the PDSCH is not configured with an SFN scheme and the PDCCH is not configured with an SFN scheme, and

the default TCI state for PDSCH reception is determined to be an active TCI state of a CORESET with a lowest controlResourceSetId in a latest slot.

Assignments (1)

Continuity (7)

References Cited (25)