Methods, systems, and devices for channel access and listen-before-talk approaches for new radio operation in unlicensed bands and/or licensed bands. A gNB and a wireless transmit/receive unit (WTRU) may operate in unlicensed spectrum. The gNB may perform listen-before-talk operation, and when successful, may send a downlink control channel with a slot format indication (SFI) to the WTRU. There may also be a handshaking procedure with an exchange of a request to transmit (RTT) and a request to receive (RTR). Prior to receiving the downlink channel, the WTRU may monitor search spaces at a first level, and once the downlink channel is received the WTRU may monitor search spaces at a second level. At the end of transmission, the WTRU may revert back to monitoring search spaces at the first level. In one example, the first level may be a mini-slot level and the second level may be a slot level.

A method and wireless device for determining a time interval, T2, for selecting a time-frequency resource are disclosed. According to one aspect, a method includes determining the time interval based on at least one parameter serving as a proxy indicative of a likelihood of collision. In some embodiments, at least one of the at least one parameter is a priority level indication, such that a higher priority transmission results in a lower value of T2.

To improve utilization efficiency of radio resources in a case that uplink control channels of a plurality of user terminals having different durations and/or starting symbols are multiplexed in the same slot. A user terminal of the present invention includes a transmitting section that transmits uplink control information (UCI) by using an uplink control channel, and a control section that controls a hopping timing of a frequency resource to which the uplink control channel is mapped, based on whether an index of a starting symbol of the uplink control channel is an even number or an odd number and a duration of the uplink control channel.

Provided are a user equipment, base station and wireless communication methods related to multiplexing of UCI in PUSCH in NR. A user equipment comprises: circuitry operative to process UCI bits to be transmitted according to the comparison of the number M of UCI bits generated based on DL assignment(s) before an UL grant from a base station and the number N of UCI bits generated based on DL assignment(s) after the UL grant with the number P of UCI bits indicated in the UL grant and/or the maximum number Q of bits determined based on at least a configured coding rate, wherein each of M, N, P, Q is an integer equal to or larger than 0; and a transmitter operative to transmit the processed UCI bits in PUSCH at a TTI indicated in the UL grant to the base station.

Disclosed in the present invention are an information processing method, a terminal device, a network device, a chip, a computer readable storage medium, a computer program product, and a computer program. The method comprises: receiving indication information sent by a network device for activating or deactivating CG; and feeding back confirmation information to the network device, wherein the confirmation information is information fed back over a carrier satisfying a preset condition, and/or the content of the confirmation information comprises at least one of the followings: a cell group identifier, a carrier identifier, a CG identifier, and a CG group identifier.

An operation method of a first terminal in a communication system is provided. The method includes transmitting, to a base station, a configuration request message requesting configuration of a sidelink (SL) bandwidth part (BWP) used for sidelink communication between the first terminal and a second terminal. A configuration information message is received including configuration information of the SL BWP from the base station. The sidelink communication is performed with the second terminal using one or more SL BWPs indicated by the configuration information and in response to determining that reconfiguration of the one or more SL BWPs is necessary, a reconfiguration request message is transmitted to the base station.

A method and device for monitoring a signal in a wireless communication system includes a PDCCH monitoring operation based on a combination of X and Y. In detail, in order to monitor a PDCCH in Y slots, a duration of a search space is restricted to be an integer multiple of L.

According to one embodiment, a wireless communication device includes a transmitter configured to transmit a first frame including information to specify a plurality of frequency components; and controlling circuitry configured to determine whether a second frame is received via each of the plurality of frequency components. The transmitter is configured to transmit a third frame including first information concerning a first value range which is used to determine whether to respond to the first frame, the first value range being dependent on a number of frequency components via which the second frame has been received.

The present invention relates to a wireless communication system, more specifically, to a method and an apparatus therefor, the method comprising the steps of: merging a first cell having a first TTI and a second cell having a second TTI, the length of the second TTI being N (N>1) times the length of the first TTI; receiving data scheduling information for the second cell in the first TTI of the first cell; and establishing data communication on the basis of the data scheduling information in the second TTI of the second cell corresponding to the first TTI of the first cell, wherein the first TTI for the first cell is any one TTI from among the N number of TTIs of the first cell corresponding to the second TTI of the second cell.

An apparatus and method for transmitting reference signal and a communication system. The method includes: transmitting first information on one or more beams formed by a plurality of antennas in beam sweeping duration, the first information at least comprising a synchronization channel, a first reference signal and a physical broadcast channel. Hence, a receiving device may demodulate the physical broadcast channel by using the first reference signal, thereby achieving design of beam reference signals in a beam sweeping system.