Embodiments of a device and a method for multi-link operations are disclosed. In an embodiment, a device includes a processor configured to perform a first backoff operation on a first link and a second backoff operation on a second link of a multi-link device (MLD) that has a non-simultaneous transmission and reception capability (NSTR MLD), and transmit a first Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PPDU) on the first link at a first start time after the first backoff operation and a second PPDU on the second link at a second start time after the second backoff operation.

Provided are a channel occupancy time sharing method, a device node and a computer-readable storage medium. A COT sharing mechanism is introduced to realize COT sharing. Many instances of LBT between different device nodes is prevented. The aim of realizing more rapid and efficient communication within one COT can be achieved. The method embodiment of the present invention may comprise: a first device node acquiring first resources shared by a second device node, wherein the first resources are some resources within a channel occupancy time (COT) when the second device node initiates the COT during first channel access.

An example method for transmitting a random access preamble comprises selecting (502) a random access preamble configuration from a plurality of predetermined random access preamble configurations. The method further includes determining (504) a time interval in which to transmit the random access preamble. The method further comprises transmitting (506) the random access preamble according to the selected random access preamble configuration. Each of the plurality of random access preamble configurations comprises a combination of (a) a single root sequence from a predetermined set of one or more root sequences, (b) a single cyclic shift of a predetermined plurality of cyclic shifts for the root sequence, and (c) a single starting position of two or more predetermined starting positions within time intervals allocated for random access preamble transmission.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may transmit, to a second UE, an initial transmission of a transport block via a sidelink unlicensed band. The UE may receive, from the second UE, a negative acknowledgement (NACK) based at least in part on the initial transmission of the transport block. The UE may transmit, to the second UE and based at least in part on the NACK and a retransmission reservation, a retransmission of the transport block via the sidelink unlicensed band in a retransmission occasion of a plurality of retransmission occasions associated with the retransmission reservation. Numerous other aspects are described.

A data transmission method, apparatus, device, and a computer-readable storage medium are provided. The data transmission method of the present disclosure includes receiving data sent by a User Equipment UE, determining a Session Management Function SMF, and forwarding the data to the SMF, wherein after the SMF receives the data, the SMF forwards the data to a User Plane Function UPF.

An information transmission method, a base station, and user equipment are described. The method includes receiving a random access preamble sent by user equipment (UE) and generating first information according to the received random access preamble. The first information is random access response information, and the first information includes at least one of the following information: narrowband indication information used for transmission of a control channel, initialization parameter indication information of a demodulation reference signal scrambling sequence initialization parameter used for transmission of the control channel, coverage enhancement level indication information used for transmission of the control channel, or resource allocation information used for transmission of second information. The second information is response information to the first information. The method further includes sending the first information to the UE.

A data transmission method includes: determining one or more listening frequency bands within an unlicensed frequency range; and determining the frequency band type of at least one listening frequency band in the one or more listening frequency bands, the frequency band type including at least one of an uplink listening frequency band, a downlink listening frequency band, or an undefined listening frequency band, the downlink listening frequency band being used for downlink transmission, the uplink listening frequency band being used for uplink transmission, and the undefined listening frequency band being used for either uplink transmission or downlink transmission.

An uplink data transmission method and an apparatus include or relate to a terminal device which determines, based on indication information of a network device, a time-frequency resource corresponding to a random access resource, or a part of a time frequency resource in the random access resource, to directly transmit uplink data. Configuration information of a time-frequency resource for random access may be reused for configuration information of the time-frequency resource, so that signaling overheads are reduced and a resource utilization is improved.

A data sending method and a terminal device are provided. The data sending method is applied to a terminal device and includes sending placeholder data in a guard period of a slot, an idle duration of the guard period being less than or equal to a target sensing duration. The placeholder data is sent in the guard period of the slot, such that a duration of the guard period may be reduced and a possibility of a transmission resource being preempted by other terminal devices may be reduced, or even avoid the transmission resource being preempted by the other terminal devices.

A wireless local area network sensing method. The method includes: in a process in which a second network device performs high frequency MIMO channel access, a first network device sends indication information to a plurality of second network devices, where the indication information indicates the plurality of second network devices to send uplink sensing signals; and the first network device receives the uplink sensing signals from the second network devices and performs uplink sensing based on the uplink sensing signals.