Apparatuses, methods, and systems are disclosed for transmitting and/or receiving feedback for sidelink transmissions. One method (1000) includes receiving (1002) information from a network device indicating multiple resources Begin for sidelink transmission and resources for feedback. The method (1000) includes transmitting (1004) sidelink data using the multiple resources for sidelink transmission. The method (1000) includes transmitting (1006) feedback to the network device using the resources for feedback based on the transmission of the sidelink data, wherein transmitting the feedback includes: transmitting only a negative acknowledgment on a first at least one resource of the resources for feedback in response to sidelink feedback not being used for the transmission of the sidelink data; transmitting only a positive acknowledgment or no acknowledgment on a second at least one resource of the resources for feedback in response to the sidelink feedback being used for the transmission of the sidelink data; or a combination thereof.

This application provides a data feedback method. The method includes: A second terminal sends first feedback information to a first terminal based on a sidelink. The first terminal determines, based on a receiving result of the first terminal for first data and a receiving result that is of the second terminal and that is indicated by the first feedback information, second feedback information sent to a network device. In this way, an energy saving requirement of the second terminal is met, and that the network device can also determine receiving results of the first terminal and the second terminal based on the second feedback information is also ensured, thereby reducing unnecessary operations performed by the network device.

Methods and apparatus for negative acknowledgement (NACK)-only reporting in radio resource control (RRC) idle and inactive states are provided. A method implemented by a user equipment (UE) comprising: receiving, from a serving node and via a new radio (NR) radio access network (RAN), at least one physical downlink shared channel (PDSCH) transport block; determining that a first PDSCH transport block is decoded erroneously during a UE RRC idle state or a UE RRC inactive state; generating a hybrid automatic repeat request (HARQ) information report indicating NACK of the first PDSCH transport block; and performing NACK-only reporting to the serving node. When a second PDSCH transport block is decoded correctly or is not decoded, UE determines not generating a HARQ information report indicating an acknowledgement (ACK) of the second PDSCH transport block.

A sidelink transmission control method, a transmit terminal, and a receive terminal are provided, where a method of a transmit terminal side includes: determining whether a trigger condition for resource reselection is satisfied; and performing a first operation in a case that the trigger condition for resource reselection is satisfied, where the first operation includes at least one of resource reselection, modulation and coding scheme MCS adjustment, and power adjustment.

There is provided a wireless device configured to perform both multi-user spatial multiplex communication and single user communication with a communication device. The wireless device is configured to set a first waiting time for the single user communication, and count the first waiting time in a period in which a second waiting time for the multi-user spatial multiplex communication is counted. The wireless device then transmits data through the single user communication after the first waiting time expires.

Mechanisms may be used for aggregating acknowledgement (ACK), block ACK (BA) and/or short packets transmissions for multi-user (MU) wireless communication systems. Aggregation mechanisms may be used for uplink (UL) and/or downlink (DL) orthogonal frequency division multiple access (OFDMA), and/or UL/DL multiple-user multiple input multiple output (MU-MIMO) transmissions, for example. Multi-user short packets may be aggregated and/or simultaneously transmitted for DL, UL, or peer-to-peer (P2P) transmissions.

Methods, systems, and devices for wireless communications are described. Generally, a user equipment (UE) may support both unicast and multicast downlink signaling, such as on a single component carrier (CC). A UE may receive a unicast message over a first CC during a transmission time interval (TTI) using a first set of processing resources. The UE may simultaneously receive a multicast message over the first CC during the same TTI using a second set of processing resources. The first and second sets of processing resources may be associated with first and second hybrid automatic repeat request (HARQ) soft buffers, first and second CCs, or first and second transmit/receive points (TRPs).

In an aspect, the present disclosure includes a method, apparatus, and computer readable medium for wireless communications for generating, by a network entity for one or more user equipments (UEs), a downlink control information (DCI) for modifying a transmission scheme of the one or more UEs, the DCI including at least one hybrid automatic repeat request (HARQ) process number; and transmitting, by the network entity to the one or more UEs, the DCI including the at least one HARQ process number.

The present invention provides an apparatus of transmitting broadcast signals. The apparatus includes, an encoder for encoding service data, a bit interleaver for bit interleaving the encoded service data, a mapper for mapping the bit interleaved service data into a plurality of OFDM (Orthogonal Frequency Division Multiplex) symbols to build at least one signal frame, an OFDM modulator for modulating data in the built at least one signal frame by an OFDM scheme and a transmitter for transmitting the broadcast signals having the modulated data.

A pre-5th-generation (pre-5G) or 5G communication system for supporting higher data rates beyond a 4th-generation (4G) communication system, such as long term evolution (LTE) is provided. A channel encoding method in a communication or broadcasting system includes identifying an input bit size, determining a block size (Z), determining a low density parity check (LDPC) sequence to perform LDPC encoding, and performing the LDPC encoding based on the LDPC sequence and the block size.