A method for performing, by a first device, wireless communication and an apparatus for supporting same are provided. The method includes: receiving a physical sidelink shared channel (PSSCH) from a second device; determining a physical sidelink feedback channel (PSFCH) resource associated with the PSSCH; and transmitting, to the second device, a hybrid automatic repeat request (HARQ) feedback on the PSFCH resource. Here, at least one subchannel for the PSSCH is associated with at least one first PSFCH resource including at least one second PSFCH resource, each second PSFCH resource included in the at least one first PSFCH resource is associated with each slot on the at least one subchannel, and the PSFCH resource may be determined on the basis of information related to the at least one subchannel for the PSSCH, information related to at least one slot for the PSSCH, and a source ID of the second device.

Disclosed herein are methods and apparatus for HARQ feedback in NR Uu groupcast or broadcast, including methods for assigning and releasing the groupcast RNTI for Uu groupcast or broadcast, methods for enabling and disabling the HARQ feedback for Uu groupcast or broadcast, and methods for HARQ feedback and corresponding resource allocation for Uu groupcast or broadcast, including ACK-NACK based Uu groupcast HARQ feedback, NACK only based Uu groupcast HARQ feedback, and Enhanced ACK-NACK based Uu groupcast HARQ feedback. Also disclosed herein are methods for collision handling between HARQ feedback for Uu broadcast/groupcast and other transmissions.

A terminal includes a receiving section that receives downlink control information for which cyclic redundancy check (CRC) bits are scrambled with use of a radio network temporary identifier (RNTI) common to one or more terminals, and a control section that controls reception of data associated with a multicast traffic channel (MTCH) with use of a physical downlink shared channel scheduled by the downlink control information in one or more bandwidth parts in a cell. Therefore, it is possible to appropriately control reception of multicast transmission using a physical downlink shared channel.

A network device sends multicast configuration information to a terminal device, where the multicast configuration information corresponds to a first multicast service, the multicast configuration information includes first indication information, and the first indication information indicates that the terminal device sends first feedback information for the first multicast service. The terminal device receives the first multicast service based on the first multicast configuration information, and then sends the first feedback information corresponding to the first multicast service to the network device based on the first indication information in the first multicast configuration information. The feedback mechanism applies to a multicast transmission technology and improves transmission reliability of a multicast service.

An operating method of a user equipment communicating with a base station based on a fifth-generation (5G) mobile network includes setting at least one value of at least one time parameter based on an activated function in the 5G mobile network; determining a processing time for a physical downlink shared channel (PDSCH) from the base station based on the at least one value; determining a capability of the user equipment by comparing the processing time with a reference time; and transmitting information including the capability of the user equipment to the first base station.

The present disclosure provides a method performed by a user equipment (UE), the method including determining formats of all downlink control information (DCI) to be received and DCI format payload sizes corresponding to the formats of the DCI; performing an alignment operation on one or more of the DCI format payload sizes according to a protocol or higher-layer signaling; and receiving all DCI, wherein, the formats of all DCI to be received include a DCI format for a multicast physical downlink shared channel (PDSCH).

A method for determining sidelink resource is provided. The method includes enabling a power saving mechanism by a first node, and determining a resource for sidelink transmission based on the power saving mechanism.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive one or more repetitions of a broadcast message for broadcast service in one or more transmission occasions. The UE may determine a hybrid automatic repeat request (HARQ) configuration that indicates whether HARQ combining is supported for the broadcast message based at least in part on one or more properties of the broadcast message. The UE may perform a decode attempt on a transport block carried in the one or more repetitions of the broadcast message based at least in part on the HARQ configuration. Numerous other aspects are described.

Disclosed are a broadcast signal transmitting apparatus, a broadcast signal receiving apparatus, and a broadcast signal transceiving method in the broadcast signal transmitting and receiving apparatuses. The broadcast signal transmitting method comprises the steps of: compressing headers of data packets which are included in an Internet protocol (IP) stream identified by access information, wherein the compressed data packets include a first packet containing both static information and dynamic information in the header thereof, and a second packet containing dynamic information in the header thereof; splitting the static information from the header of the first packet and diverting the remaining part thereof into the second packet; outputting an IP stream, which includes the second packet, via a data physical layer pipe (PLP); outputting, via a common PLP, a common stream, which includes the static information of the header of the first packet split in the previous step, compression information and IP-PLP mapping information for linking the IP stream and the data PLP; generating a signal frame on the basis of the data from the data PLP and the data of the common PLP; and transmitting a broadcast signal which includes the signal frame.

A wireless device receives a sidelink control information (SCI) that may schedule a transport block and may also indicate a first repetition value. The wireless device may also receive a transport block via a physical sidelink shared channel (PSSCH). Based on a comparison of the first repetition value received via the SCI and a repetition threshold, the wireless device may determine to transmit an acknowledgment for the received transport block. The wireless device may then transmit the acknowledgment for the received transport block.