A method of wireless communication performed by a user equipment (UE) incudes receiving supplemental semi-persistent scheduling (SPS) via radio resource control (RRC) signaling. The method also includes receiving the downlink re-transmissions according to the supplemental SPS. A method performed by the UE also includes receiving downlink feedback information (DFI) for a packet and determining one or more of resource block allocation, a start and length indicator value (SLIV), or a number of repetitions for re-transmission of the packet in response to the DFI. The method further includes re-transmitting the packet during a re-transmission period based on one or more of the resource block allocation, the SLIV, or the number repetition.

A method of wireless communication performed by a user equipment (UE) incudes receiving supplemental semi-persistent scheduling (SPS) via radio resource control (RRC) signaling. The method also includes receiving the downlink re-transmissions according to the supplemental SPS. A method performed by the UE also includes receiving downlink feedback information (DFI) for a packet and determining one or more of resource block allocation, a start and length indicator value (SLIV), or a number of repetitions for re-transmission of the packet in response to the DFI. The method further includes re-transmitting the packet during a re-transmission period based on one or more of the resource block allocation, the SLIV, or the number repetition.

A UE may determine a target slot for HARQ deferral for transmission of first HARQ-ACK information, based on transmission of the first HARQ-ACK information overlapping with a downlink symbol in a first slot, transmit a second HARQ-ACK codebook including a first HARQ-ACK codebook in a second slot for retransmission of the first HARQ-ACK codebook, based on DCI triggering retransmission of the first HARQ-ACK codebook scheduled to be transmitted in the first slot, and transmit uplink control information in the target slot. The uplink control information does not include the first HARQ-ACK information, based on the second HARQ-ACK codebook including the first HARQ-ACK information.

A UE may determine a target slot for HARQ deferral for transmission of first HARQ-ACK information, based on transmission of the first HARQ-ACK information overlapping with a downlink symbol in a first slot, transmit a second HARQ-ACK codebook including a first HARQ-ACK codebook in a second slot for retransmission of the first HARQ-ACK codebook, based on DCI triggering retransmission of the first HARQ-ACK codebook scheduled to be transmitted in the first slot, and transmit uplink control information in the target slot. The uplink control information does not include the first HARQ-ACK information, based on the second HARQ-ACK codebook including the first HARQ-ACK information.

Disclosed is a method performed by a terminal in a wireless communication system that includes identifying that a first uplink channel collides with a second uplink channel and a first downlink channel, resolving a collision between the first uplink channel and the first downlink channel by not transmitting a time unit of the first uplink channel that collides with the first downlink channel in case that a first predefined condition is satisfied, resolving a collision between the first uplink channel and the second uplink channel, and performing a downlink reception or an uplink transmission based on at least one of the first uplink channel, the second uplink channel or the first downlink channel.

Disclosed is a method performed by a terminal in a wireless communication system that includes identifying that a first uplink channel collides with a second uplink channel and a first downlink channel, resolving a collision between the first uplink channel and the first downlink channel by not transmitting a time unit of the first uplink channel that collides with the first downlink channel in case that a first predefined condition is satisfied, resolving a collision between the first uplink channel and the second uplink channel, and performing a downlink reception or an uplink transmission based on at least one of the first uplink channel, the second uplink channel or the first downlink channel.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may defer transmission of a first feedback message to a target transmission time interval (TTI). During a reception time interval, a base station may transmit, to the UE, downlink control information (DCI) that triggers the UE to schedule a second feedback message, where the first feedback message and the second feedback message are associated with different types of hybrid automatic repeat request (HARQ) codebooks. The UE may compare a minimum processing time of the UE with a time difference between the reception time interval and the target TTI and determine (e.g., evaluate) whether to cancel transmission of the first feedback message based on the comparison. In accordance with the determining, the UE may transmit at least one of the first feedback message or the second feedback message.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may defer transmission of a first feedback message to a target transmission time interval (TTI). During a reception time interval, a base station may transmit, to the UE, downlink control information (DCI) that triggers the UE to schedule a second feedback message, where the first feedback message and the second feedback message are associated with different types of hybrid automatic repeat request (HARQ) codebooks. The UE may compare a minimum processing time of the UE with a time difference between the reception time interval and the target TTI and determine (e.g., evaluate) whether to cancel transmission of the first feedback message based on the comparison. In accordance with the determining, the UE may transmit at least one of the first feedback message or the second feedback message.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify a misalignment between system frame numbers (SFNs) associated with multiple serving cells in an asynchronous carrier aggregation configuration. The UE may select an SFN to use as an input for calculating a transmission parameter associated with communicating with one or more of the serving cells. Additionally, the serving cells may identify which SFN the UE selects in order to communicate efficiently with the UE. In some examples, the UE may receive an explicit indication of which SFN to use, and select the SFN accordingly. In other examples, the UE may select which SFN to use based on one or more parameters associated with the serving cells in the asynchronous carrier aggregation configuration.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify a misalignment between system frame numbers (SFNs) associated with multiple serving cells in an asynchronous carrier aggregation configuration. The UE may select an SFN to use as an input for calculating a transmission parameter associated with communicating with one or more of the serving cells. Additionally, the serving cells may identify which SFN the UE selects in order to communicate efficiently with the UE. In some examples, the UE may receive an explicit indication of which SFN to use, and select the SFN accordingly. In other examples, the UE may select which SFN to use based on one or more parameters associated with the serving cells in the asynchronous carrier aggregation configuration.