A communication method and system for converging a 5th-generation (5G) communication system for supporting higher data rates beyond a 4th-generation (4G) system with a technology for internet of things (IoT). The disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology. The method of a terminal in a wireless communication system are provided. The method includes receiving information, which is related to a first transmission time and a second transmission time of an uplink signal of a terminal, from a base station, when the uplink signal of the terminal is configured in an unlicensed band, performing a channel access in the unlicensed band, and when the unlicensed band is not in an idle state based on a channel access result before the first transmission time, performing a channel access until the second transmission time.

A method to operate a first radio terminal of a radio communications network, is provided, wherein the method comprises: determining a SPS configuration for the first radio terminal, wherein the SPS configuration indicates a set of SPS, semi-persistently scheduled, radio resources of a shared device-to-device radio channel, in particular of a sidelink channel, SL-CH, wherein the indicated SPS radio resources are intended for a transmission by the first radio terminal; transmitting, towards at least one second radio terminal, data via a first subset of the set of the SPS radio resources; selecting at least one sensing resource out of the set of SPS radio resources; sensing the at least one sensing resource; determining a contention indicator in dependence on the sensing of the at least one sensing resource; and refraining from transmitting data via a second subset of the set of SPS radio resources if the contention indicator indicates a contention situation at the at least one sensing resource.

Provided by an embodiment of the present application are a method and device for determining a contention window, the method comprising: according to feedback information sent by a terminal device, a network device determining the length of a contention window (CW) used for channel detection, the feedback information comprising feedback information corresponding to a physical downlink shared channel (PDSCH) sent by the network device on a first carrier wave; according to the length of CW, the network device performing channel detection on the first carrier wave.

A user device performing communication with another user device by beamforming in a first frequency and a second frequency different from the first frequency is provided. The user device includes a receiving unit configured to receive a first sensing signal in the first frequency; a control unit configured to select a resource in the second frequency used for transmission, based on a resource location on a radio frame in which the first sensing signal is provided, or based on information, contained in the first sensing signal, indicating a resource location on a radio frame in the second frequency; and a transmitting unit configured to perform data transmission in the second frequency by using the selected resource.

A user apparatus includes, a control unit configured to apply in a specific order a plurality of processing rules for determining a channel as a transmission candidate by dropping a channel or multiplexing channels and repeat the application until detecting no channel collision in a time domain, in a case where a channel associated with a first service type and a channel associated with a second service type collide with each other at least in a time domain, and for at least one of the channel associated with the first service type and the channel associated with the second service type, a plurality of channels associated with a same service type collide with each other at least in the time domain; and a transmitting unit configured to transmit, to a base station apparatus, the channel as the transmission candidate for which no channel collision is detected in the time domain.

Apparatuses, systems, and methods for a wireless device to perform methods to implement mechanisms for performing a listen again after talk procedure to detect collisions over an access medium. The wireless device may determine a frequency and configuration of modified transmission frames for transmission over an access medium (licensed or unlicensed) and may further determine a timing of the modified transmission frames within a transmission occasion. The wireless device may detect, during a listening period of the modified transmission frame, a collision and may adjust, based, at least in part, on the detected collision, a remaining transmission schedule for the transmission schedule and/or LBT parameters.

Provided are a transmission method and device, and a computer readable storage medium. The transmission method includes: receiving, by a terminal, indication information of a maximum transmission block size (TBS) supported by a data transmission, and determining the maximum TBS supported by the data transmission according to the indication information; and determining, by the terminal, a TBS supported by the data transmission according to the maximum TBS supported by the data transmission.

Disclosed herein are related to a system and a method of coordinating among artificial reality links. In one approach, a system comprising a first console for executing an application for artificial reality may include a wireless communication interface and a processor. The processor may be configured to send, via the wireless communication interface, a first message comprising a first plurality of parameters and a first schedule for access to a shared wireless channel by the first console, receive, from a second console via the wireless communication interface, a second message comprising a second plurality of parameters and a second schedule for access to the shared wireless channel by the second console, update, responsive to the second message, the first plurality of parameters and the first schedule, and/or send, via the wireless communication interface, a third message comprising the updated first plurality of parameters and the updated first schedule.

A method for reporting a failure report and a related device are provided. The method includes: determining reporting signaling in a case that an uplink Listen-Before-Talk (LBT) failure occurs on a terminal in at least one cell; and sending failure information of the at least one cell to a network side based on the reporting signaling. In the method for reporting a failure report, in a case that the LBT failure occurs in the at least one cell, the terminal can quickly report failure information to the network side, so that the network side can restore the uplink LBT failure in a timely manner, to prevent the terminal from continuously triggering a connection reestablishment process.

A wireless data transmitting system having a wireless data receiving device and a plurality of wireless data transmitting devices is disclosed. Each of the wireless data transmitting devices transmits data at every a specific period if no collision is detected during data transmission, and if a collision is detected during data transmission, the wireless data transmitting device decides a back-off delay time and transmits data after the back-off delay time has elapsed. The back-off delay time of the wireless data transmitting device is a multiplication of a unit slot time of the wireless data transmitting device transmitting at least one data packet, by k, wherein k is an integer equal to or larger than 1 and is randomly decided by a probability distribution model of the wireless data transmitting device.