According to one embodiment of the present disclosure, provided is a method by which a first apparatus performs sidelink communication. In one example, provided is a method by which the first device saves power for sidelink communication in NR V2X.

The embodiments of the present disclosure provide a HARQ-ACK codebook feedback method and a terminal device, capable of supporting HARQ-ACK feedback in an SL-U system. The HARQ-ACK codebook feedback method includes: receiving, by a first terminal device, a first SCI format transmitted by a second terminal device, the first SCI format being used to receive a first PSSCH, and the first SCI format including first indication information, first ID indication information corresponding to the first terminal device, and second ID indication information corresponding to the second terminal device; and generating, by the first terminal device, a first HARQ-ACK codebook based on the first ID indication information and/or the second ID indication information, and the first indication information, the first HARQ-ACK codebook including a first feedback bit containing feedback information corresponding to the first PSSCH.

Communication devices are provided that facilitate receiving information units and providing feedback to other communication devices.

A data transmission method and device and a storage medium are provided. The method comprises: in a process of triggering a blind retransmission mechanism, obtaining retransmission times circularly (101); and when the retransmission times are less than a preset retransmission times threshold, retransmitting data to a receiving terminal and updating the retransmission times (102).

Methods, systems, and devices for wireless communications are described. A communication device, otherwise known as a user equipment (UE) may determine a first uplink configured grant configuration corresponding to a first value of a control resource set (CORESET) pool index, and determine a second uplink configured grant configuration corresponding to a second value of the CORESET pool index different from the first value of the control resource set pool index. The UE may transmit a first uplink transmission during a first uplink grant occasion according to the first uplink configured grant configuration and a second uplink transmission during a second uplink grant occasion according to the second uplink configured grant configuration. Both the first uplink transmission and the second uplink transmission may correspond to a same transport block and a hybrid automatic repeat request (HARQ) identifier.

Embodiments herein disclose conditioning traffic through multiple data paths of a Software-Defined Wide Area Network (SD-WAN). Some embodiments include monitoring a path through an SD-WAN to reach a destination node, determining a quality score for packets to the destination node on the path, determining a link utilization for the path, sending a data packet sequence to the destination node on the path, generating a forward error correction (FEC) packet for the data packet sequence, and sending the FEC packet to the destination node on the path in response to the quality score being less than a quality threshold and the link utilization being less than a high utilization threshold.

Methods, systems, and devices for wireless communications are described for providing acknowledgment feedback in sidelink communications. A sidelink transmitting UE may receive a resource grant for a sidelink communication with one or more other UEs and may transmit the sidelink communication in accordance with the grant. The transmitting UE may then monitor for acknowledgment feedback from the one or more other UEs and generate sidelink acknowledgment feedback. A joint communication that provides both downlink acknowledgment feedback and the sidelink acknowledgment feedback may be provided to a serving base station. The transmitting UE may also multiplex sidelink acknowledgment feedback for each of two or more other UEs in a communication to the serving base station. The serving base station may determine whether any resources for retransmissions are to be granted based on the acknowledgment feedback.

A method and base station are disclosed. The base station comprises a wireless transceiver and a processor. The base station performs wireless communications with a wireless transmit/receive unit (WTRU) via a primary cell, transmits a message via a shared channel of the primary cell, wherein the message includes information identifying a plurality of non-primary cells, and transmits, to the WTRU, data over a downlink channel of at least one of the plurality of non-primary cells identified by the message.

Groupcast communications between devices of a group of devices, e.g. between vehicles in a platoon, may include a device in the group transmitting a groupcast message in a sidelink transmission to the other devices and receiving feedback information in sidelink transmissions from the other devices within the same channel occupancy time (CoT). The feedback information may be transmitted by the other devices in response to the groupcast message including an information request directed to the other devices. The group of devices may include a designated group leader which may manage one or more aspects of the communications of the other devices in the group. The designated group leader may be dynamically switched based at least on the received feedback information. The devices in the group may use beamforming for intra-group and inter-group sidelink communications for efficient spectrum usage.

Aspects presented herein may enable a sidelink device to report or to receive HARQ feedback for sidelink channels based on a long PSFCH format. In one aspect, an apparatus transmits, to a second UE, an indication to provide HARQ feedback for at least one sidelink channel. The apparatus transmits, to the second UE, the at least one sidelink channel. The apparatus receives, from the second UE, an ACK or a NACK for the at least one sidelink channel via a PSFCH, the PSFCH including a long PSFCH format and associated with a sidelink resource pool.