The present application discloses a DAI configuration method and device, a DAI indication method and device, a DAI sending method and device, and a medium, which relate to the field of mobile communications. The DAI configuration method comprises: determining a first bit of a first counting DAI in a first DCI format; receiving configuration information, the configuration information being used for configuring a second bit of a second counting DAI in a second DCI format, the PDSCH receipt or the SPS release scheduled in the first DCI format and the PDSCH reception or the SPS release scheduled in the second DCI format feeding back HARQ-ACK in the same HARQ-ACK codebook. Furthermore, the first bit and the second bit are the same, and when subsequently determining the position of HARQ-ACK according to a counting DAI field, a terminal device can ensure the accuracy of determining the position of HARQ-ACK.

A feedback information sending method and an apparatus are provided. The method includes: A network device sends, to a terminal device, M pieces of DCI for scheduling N transmissions of first data, values in DAI fields comprised in all of the M pieces of DCI are the same; and the terminal device sends feedback information of the first data to the network device, wherein the feedback information is comprised in an HARQ-ACK codebook, and a location of the feedback information in the HARQ-ACK codebook is determined based on a DAI field in first DCI of the M pieces of DCI.

Feedback information sending methods and apparatuses are provided in this disclosure. One method includes receiving, from a network device, M pieces of downlink control information (DCI) for scheduling transmissions of N pieces of data, the M pieces of DCI comprise first DCI and second DCI, determining, based on resource indication information in third DCI, a time-frequency resource for sending a hybrid automatic repeat request-acknowledgement (HARQ-ACK) codebook that comprises feedback information for N pieces of data corresponding to N pieces of DCI of the M pieces of DCI, and sending the HARQ-ACK codebook to the network device on the time-frequency resource.

In an embodiment a sidelink communication method includes when a hybrid automatic repeat request (HARQ) feedback attribute of at least one sidelink logical channel of a first terminal device is enabled, obtaining, by the first terminal device from a network side device, one or more resource pools for the first terminal device, wherein a physical sidelink feedback channel (PSFCH) resource is configured in at least one of the resource pools.

Methods, systems, and devices for wireless communication at a first user equipment (UE) are described. A UE may receive a control signal indicating a set of durations. A duration of the set of durations may be scheduled for uplink resources and additional resources including downlink resources, flexible resources, or both. The UE may further receive an indication of a slot format configuration permitting sidelink communications on the uplink resources during the duration scheduled for the uplink resources and the additional resources. Upon identifying that sidelink communications are permitted, the UE may transmit a sidelink transmission using the uplink resources and during the duration.

A method of transmitting an acknowledgement (ACK) signal in a wireless communication system is provided. The method includes: establishing a first wireless connection between a first and second electronic devices; establishing a second wireless connection between the first electronic device and a source device; transmitting, by the first electronic device, communication parameter information to the second electronic device; transmitting, by the first electronic device, a data request to the source device; receiving, by the first electronic device, a data packet from the source device in response to the data request; receiving, by the second electronic device, the data packet from the source device based on the communication parameter information; transmitting, by the first electronic device, a first ACK signal to the second electronic device; and transmitting, by the second electronic device, a second ACK signal to the source device based on the first ACK signal.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, information that indicates a resource allocation for a downlink transmission and an uplink resource for transmission of a hybrid automatic repeat request (HARQ) codebook. The UE may transmit, to the base station, uplink control information (UCI) that includes an indication of whether transmission of the HARQ codebook is cancelled. Numerous other aspects are described.

Apparatuses, methods, and systems are disclosed for supporting a mixture of BR and HFBT. One apparatus (600) includes a processor (605) that provides a physical (“PHY”) layer (255) and a Medium Access Control (“MAC”) layer (260) and a transceiver (625) that communicates on a sidelink channel. The processor (605) determines (805) a minimum time duration between a first resource for HARQ transmission of the transport block (“TB”) and a second resource for HARQ transmission of the TB. Here, the minimum time duration comprises a sum of: a first time to receive HARQ feedback, a second time to determine whether to perform retransmissions of the TB, and a third time to retransmit the TB. The processor (605) selects (810) a retransmission mode based on the minimum time duration and selects (815) sidelink resources for retransmission of the TB based on the selected retransmission mode.

Wireless communications systems and methods related to piggybacking opportunities for communicating downlink control information (DCI) in a semi-persistent scheduling (SPS) configuration are provided. A first wireless communication device determines a piggybacking opportunity for communicating downlink control information (DCI) in a semi-persistent scheduling (SPS) configuration. The first wireless communication device communicates, with a second wireless communication device, a first communication based on the determined piggybacking opportunity.

The present disclosure relates to an electronic device, a communication method and a storage medium in a wireless communication system. There is provided an electronic device for a transmitter, comprising a processing circuitry configured to: perform an initial transmission and blind transmissions of a transport block to a receiver by a configured Hybrid Automatic Repeat reQuest (HARQ) process, the blind transmissions being planned to be performed within a predetermined time window after the initial transmission; perform detection for a HARQ feedback from the receiver, the HARQ feedback indicating whether decoding for the transport block at the receiver is successful or not; and control to cancel or continue the blind transmissions based on a result of the detection.