Provided are a method by which a first device performs wireless communication, and an apparatus supporting same. The method may comprise the steps of: receiving, from a base station, first downlink control information (DCI) for activating a configured sidelink (SL) grant, wherein the first DCI includes information related to a physical uplink control channel (PUCCH) resource for reporting SL hybrid automatic repeat request (HARD) feedback to the base station; transmitting a medium access control protocol data unit (MAC PDU) to a second device through a physical sidelink shared channel (PSSCH) on the basis of the configured SL grant; receiving, from the base station, second DCI for deactivating the configured SL grant; transmitting, to the base station, an SL confirmation medium access control (MAC) control element (CE) in response to the second DCI; and determining whether the PUCCH resource related to at least one SL resource allocated by the configured SL grant is valid on the basis of the time at which the SL confirmation MAC CE was transmitted.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration for a shared physical downlink shared channel (PDSCH). The UE may receive a first communication via the shared PDSCH and a first bearer based at least in part on the configuration, the first communication being one of a unicast communication or a multicast/broadcast communication. The UE may receive a second communication via the shared PDSCH and the first bearer or a second bearer based at least in part on the configuration, the second communication being the other of the unicast communication or the multicast/broadcast communication. Numerous other aspects are provided.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration for a shared physical downlink shared channel (PDSCH). The UE may receive a first communication via the shared PDSCH and a first bearer based at least in part on the configuration, the first communication being one of a unicast communication or a multicast/broadcast communication. The UE may receive a second communication via the shared PDSCH and the first bearer or a second bearer based at least in part on the configuration, the second communication being the other of the unicast communication or the multicast/broadcast communication. Numerous other aspects are provided.

A method for performing wireless communication by a first device and an apparatus for supporting same are provided. The method may comprise: receiving, from a base station, information related to a first sidelink (SL) resource and information related to a first physical uplink control channel (PUCCH) resource; transmitting, to a second device, a medium access control (MAC) packet data unit (PDU) by using the first SL resource, wherein the MAC PDU includes a packet related to a logical channel for which hybrid automatic repeat request (HARQ) feedback is disabled, and wherein the MAC PDU includes no packet related to a logical channel for which HARQ feedback is enabled; determining that retransmission of the MAC PDU is required; and transmitting, to the base station, NACK information by using the first PUCCH resource based on no SL grant available for retransmission of the MAC PDU.

A base station (10) according to an embodiment includes a data processing unit (101) and a wireless signal processing unit (103). The data processing unit (101) generates a MAC frame. The MAC frame includes input data and an identification bit (CB). The identification bit (CB) indicates that data is extended broadcast data. The wireless signal processing unit (103) converts the MAC frame into a wireless signal to distribute the wireless signal.

A terminal according to an aspect of the present disclosure includes: a receiving section that receives a medium access control-control element (MAC CE) indicating a transmission configuration indication (TCI) state; and a control section that uses the TCI state for a spatial relation of a specific uplink signal at timing after acknowledgment (ACK) transmission to the MAC CE when the specific uplink signal satisfies an application condition. According to one aspect of the present disclosure, a UL signal can be appropriately transmitted.

A station apparatus according to the present invention includes a signal demodulator configured to decode a signal of a physical layer and perform error detection, a higher layer processor configured to transfer a result of decoding the physical layer to a MAC layer and obtain data transferred from the MAC layer, and a transmitter configured to generate a signal of a physical layer, based on the data transferred from the MAC layer, wherein the signal of the physical layer includes a physical header, and the physical header includes information associated with a result of the error detection.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit an uplink message on an uplink channel associated with a special cell (Spcell) to trigger maximum permissible exposure (MPE) reporting based at least in part on an MPE event. The UE may transmit an MPE medium access control (MAC) control element (MAC-CE) to report the MPE event, wherein the MPE MAC-CE is transmitted on a physical uplink shared channel associated with the Spcell or a secondary cell. Numerous other aspects are provided.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine an average energy level radiated by the UE over a time period. The UE may determine whether the average energy level radiated by the UE over the time period exceeds a maximum permissible exposure (MPE) limit. The UE may transmit, to base station, a medium access control (MAC) control element (MAC-CE) that includes information related to a power management maximum power reduction (P-MPR) applied at the UE and/or an uplink duty cycle in effect at the UE based at least in part on the average energy level radiated by the UE over the time period exceeding the MPE limit. Numerous other aspects are provided.

A protocol data unit generation method, a configuration method, an apparatus, and an electronic device are disclosed. The protocol data unit generation method is applied to a terminal, and the method includes: generating, by a media access control MAC entity of the terminal, a MAC protocol data unit PDU for a currently scheduled hybrid automatic repeat request HARQ entity according to at least one of the following: first indication information sent by a network-side device, second indication information sent by a physical layer entity to the MAC entity, and a configuration of the terminal; and sending, by the MAC entity, the generated MAC PDU to the physical layer entity.