IP Library › Granted Patent US 12677312
Granted Patent B2
US 12677312 · App. 17/926,853 · Granted Jul 7, 2026

Half duplex frequency division duplex support in non-terrestrial networks

Inventors: Chunxuan Ye (San Diego, CA); Dawei Zhang (Saratoga, CA); Haitong Sun (Cupertino, CA); Hong He (San Jose, CA); Huaning Niu (San Jose, CA); Oghenekome Oteri (San Diego, CA); Seyed Ali Akbar Fakoorian (San Diego, CA); Wei Zeng (Saratoga, CA); Weidong Yang (San Diego, CA); Yushu Zhang (Beijing, CN)
Assignee: Apple Inc.
H04W72/566H04L5/16H04W72/1263
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Quick Facts
Patent No.
US 12677312
App. No.
17/926,853
Granted
Jul 7, 2026
Kind
B2
Abstract

Disclosed are methods, systems, and computer-readable medium to perform operations including: determining a scheduling conflict between an uplink transmission and a downlink reception; determining a type of the scheduling conflict; and applying, based on in part on the type of the scheduling conflict, a prioritization rule that prioritizes at least a portion of the uplink transmission or the downlink reception in order to mitigate the scheduling conflict.

Claims (49)

1 . A method comprising:

determining a scheduling conflict between an uplink transmission to a non-terrestrial network (NTN) and a downlink reception from the NTN;

determining, based on the scheduling conflict between the uplink transmission to the NTN and the downlink reception from the NTN, that a prioritization between the uplink transmission and the downlink reception is not configured; and

in response to the prioritization not being configured:

based on a last symbol of a control resource set comprising a downlink control information (DCI) being received earlier than a threshold time before a first symbol of the uplink transmission in a time domain, prioritizing the downlink reception over the uplink transmission, wherein the DCI schedules the downlink reception, and

based on the last symbol not being received earlier than the threshold time, prioritizing the uplink transmission over the downlink reception.

2 . The method of claim 1 , wherein the uplink transmission is a dynamic grant uplink transmission and the downlink reception is a dynamic grant downlink reception.

3 . The method of claim 1 , wherein prioritizing the downlink reception comprises:

canceling the uplink transmission; and

identifying the downlink reception.

4 . The method of claim 1 , wherein prioritizing the uplink transmission comprises:

determining not to receive the downlink reception; and

causing the uplink transmission.

5 . The method of claim 1 , wherein the downlink reception comprises a reception of at least one of a physical downlink shared channel (PDSCH) or a channel state information reference signal (CSI-RS).

6 . The method of claim 1 , wherein the uplink transmission comprises a transmission of at least one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), or a sounding reference signal (SRS).

7 . The method of claim 1 , wherein the threshold time is configured by a network or calculated by a user equipment (UE).

8 . A user equipment (UE) comprising:

one or more processors configured to, when executing instructions stored in a memory, perform operations comprising:

determining a scheduling conflict between an uplink transmission to a non-terrestrial network (NTN) and a downlink reception from the NTN;

determining, based on the scheduling conflict between the uplink transmission to the NTN and the downlink reception from the NTN, that a prioritization between the uplink transmission and the downlink reception is not configured; and

in response to the prioritization not being configured:

based on a last symbol of a control resource set comprising a downlink control information (DCI) being received earlier than a threshold time before a first symbol of the uplink transmission in a time domain, prioritizing the downlink reception over the uplink transmission, wherein the DCI schedules the downlink reception, and

based on the last symbol not being received earlier than the threshold time, prioritizing the uplink transmission over the downlink reception.

9 . The UE of claim 8 , wherein the uplink transmission is a dynamic grant uplink transmission and the downlink reception is a dynamic grant downlink reception.

10 . The UE of claim 8 , wherein prioritizing the downlink reception comprises:

canceling the uplink transmission; and

identifying the downlink reception.

11 . The UE of claim 8 , wherein prioritizing the uplink transmission comprises:

determining not to receive the downlink reception; and

causing the uplink transmission.

12 . The UE of claim 8 , wherein the downlink reception comprises a reception of at least one of a physical downlink shared channel (PDSCH) or a channel state information reference signal (CSI-RS).

13 . The UE of claim 8 , wherein the uplink transmission comprises a transmission of at least one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), or a sounding reference signal (SRS).

14 . The UE of claim 8 , wherein the threshold time is configured by a network or calculated by the UE.

15 . One or more processors configured, when executing instructions stored in a memory, to perform operations comprising:

determining a scheduling conflict between an uplink transmission to a non-terrestrial network (NTN) and a downlink reception from the NTN;

determining, based on the scheduling conflict between the uplink transmission to the NTN and the downlink reception from the NTN, that a prioritization between the uplink transmission and the downlink reception is not configured; and

in response to the prioritization not being configured:

based on a last symbol of a control resource set comprising a downlink control information (DCI) being received earlier than a threshold time before a first symbol of the uplink transmission in a time domain, prioritizing the downlink reception over the uplink transmission, wherein the DCI schedules the downlink reception, and

based on the last symbol not being received earlier than the threshold time, prioritizing the uplink transmission over the downlink reception.

16 . The one or more processors of claim 15 , wherein prioritizing the downlink reception comprises:

canceling the uplink transmission; and

identifying the downlink reception.

17 . The one or more processors of claim 15 , wherein prioritizing the uplink transmission comprises:

determining not to receive the downlink reception; and

causing the uplink transmission.

18 . The one or more processors of claim 15 , wherein the uplink transmission is a dynamic grant uplink transmission and the downlink reception is a dynamic grant downlink reception.

19 . The one or more processors of claim 15 , wherein the downlink reception comprises a reception of at least one of a physical downlink shared channel (PDSCH) or a channel state information reference signal (CSI-RS), and

wherein the uplink transmission comprises a transmission of at least one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), or a sounding reference signal (SRS).

20 . The one or more processors of claim 15 , wherein the threshold time is configured by a network or calculated by the one or more processors.