This application discloses a downlink data sending method, a downlink data receiving method, and an apparatus, and relates to the communication field, to resolve a problem that feedback information fails to be sent, and consequently, a retransmission probability of downlink data is increased, and data transmission efficiency is reduced. When at least two of P PDSCHs in one slot overlap in time domain, a network device cancels sending of partially overlapping PDSCHs. If one first PDSCH whose sending is canceled is the last repetition in PDSCH repetitions of first data, and a terminal device receives another repetition in the PDSCH repetitions of the first data before the first PDSCH, the terminal device still sends feedback information for the first data to the network device in a feedback slot corresponding to the first PDSCH.

A transmission acknowledgment method, a terminal device, and a transmission node are provided. The transmission acknowledgment method is performed by a first terminal. The method includes: monitoring a first physical control channel based on monitoring configuration information of the first physical control channel; obtaining first control information transmitted by a transmission node on the first physical control channel, where the first control information includes RTS information for a plurality of target terminal devices, and the plurality of target terminal devices include the first terminal; and sending CTS information on a second physical control channel based on the RTS information.

A communication method and apparatus that is used in fields such as V2X, an internet of vehicles, intelligent driving, and assisted driving. The method includes a first terminal apparatus detects SCI from at least one second terminal apparatus, to determine a first resource. The first terminal apparatus sends, to the third terminal apparatus, first information for triggering determining of second information, and receives the second information from the third terminal apparatus. The first terminal apparatus determines, based on the first resource and the second resource, the resource for sending the data. The first terminal apparatus selects, based on a sensing result of the first terminal apparatus and the resource recommended by the third terminal apparatus, the resource for sending the data, so that both interference around the first terminal apparatus and interference around the third terminal apparatus are considered, thereby reducing interference and improving communication quality.

A maximum PDCCH processing capability allocation method includes: obtaining cell configuration information, where the cell configuration information indicates a plurality of configured cells and scheduling information of the plurality of configured cells, the plurality of configured cells include a plurality of cells configured for the terminal device for carrier aggregation, the scheduling information indicates that one first cell is scheduled by a plurality of first target cells, or the scheduling information indicates that one second cell schedules a plurality of second target cells at a time, and the first cell, the second cell, the first target cell, and the second target cell are cells in the plurality of configured cells; determining a total quantity of cells according to the cell configuration information; and allocating a maximum PDCCH processing capability of the terminal device based on the total quantity of cells and a maximum blind detection capability of the terminal device.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information indicating a pool of transmission configuration indicator (TCI) states. The UE may receive an indication of a TCI state of the pool of TCI states for a communication in a frequency region that is not configured with a set of TCI states. The UE may transmit or receiving the communication using the TCI state. 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 physical downlink control channel (PDCCH) scheduling a physical downlink shared channel (PDSCH). The UE may transmit a physical uplink control channel (PUCCH) based on a PUCCH repetition factor, wherein the PUCCH repetition factor is indicated by a location of a control channel element (CCE) of the PDCCH, a PUCCH resource indicator (PRI) bitfield of the PDCCH, and at least one of: one or more parameters of the PDCCH, or one or more parameters of the PDSCH. Numerous other aspects are provided.

This disclosure relates to techniques for reducing blind decoding of downlink control channels in a wireless communication system. The techniques may include determining whether a control channel pilot signal, such as a demodulation reference signal (DMRS) is present within a set of control carrier entities, and accordingly determining whether the downlink control channel is present within the set of control channel elements. In this manner, a number of candidates for blind decoding may be reduced.

Certain aspects of the present disclosure provide techniques for communicating a dynamically scheduled transmission that overwrites a transmission in a semi-static scheduling occasion. A method performed by a user equipment (UE) includes receiving a first control message, activating a first semi-static scheduling configuration and a second semi-static scheduling configuration for full duplex communication, wherein: the first semi-static scheduling configuration comprises a semi-persistent scheduling (SPS) occasion and the second semi-static scheduling configuration comprises a configured grant (CG) occasion. The method may further include receiving a second control message dynamically scheduling a transmission that overwrites a downlink transmission in the SPS occasion or an uplink transmission in the CG occasion and taking one or more actions to communicate at least the transmission that overwrites the downlink transmission in the SPS occasion or the uplink transmission in the CG occasion.

Disclosed is a method of receiving a physical downlink control channel (PDCCH) through a search space (SS) set by a user equipment (UE) in a wireless communication system. The method includes transmitting first information related to the number of X slots and second information related to the number of at least one Y slot, and receiving a PDCCH through a UE-specific SS (USS) set within the at least one Y slot, based on the first information and the second information. The at least one Y slot is included in the X slots, and X and Y are positive integers.

Apparatus, methods, and computer-readable media for facilitating multiplexing SCI-only grant and data-only SPS traffic on sidelink are disclosed herein. An example method for wireless communication at a first UE includes transmitting a sidelink transmission to a second UE at a first resource, the sidelink transmission including data-only traffic and scheduling information corresponding to future data traffic. The example method also includes transmitting a time offset indicator indicating a starting resource of the future data traffic.