A control resource set processing method is provided. In the method: a terminal switches a configuration of a control resource set on an unlicensed spectrum for detecting a control signaling in response to determining that a switching condition for the control resource set is met.

A terminal includes: a reception unit configured to receive a specific information element from a base station through system information or dedicated signaling; and a control unit configured to apply a technology for an unlicensed frequency band to a target range of the specific information element in a case where the specific information element is received. The control unit executes at least listen before talk (LBT) of the technology for the unlicensed frequency band.

The present disclosure relates to a pre-5.sup.th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4.sup.th-Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure provides a method of receiving downlink channel and/or downlink reference signal on an unlicensed band. An LTE user equipment (UE) receives control information of a cell operating on an unlicensed band, and receives downlink channel and/or downlink reference signal transmitted in the cell according to the control information. According to the present disclosure, data can be properly received on an unlicensed band.

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may transmit uplink (UL) messages in unlicensed spectrum with a reduced UL timing delay. The UL timing delay may be reduced by using a shortened transmission time interval (TTI) (e.g., a TTI that is reduced in duration relative to other TTIs in the system or in a legacy system) or by reducing the number of TTIs between a grant and the corresponding UL message. The reduced UL timing delay may decrease the likelihood that the UE will wait for a subsequent transmit opportunity (TxOp) to transmit the UL message. In some cases, the reduced UL timing delay corresponds to a reduced hybrid automatic repeat request (HARM) processing delay. In some cases, a time difference (e.g., measured in TTIs) between a measurement reference TTI a corresponding channel state information (CSI) report may also be reduced.

Provided is a radio communication device capable of reducing interference, caused by non-SR transmission, with a basic service set (BSS) performing spatial reuse (SR) transmission. An SR transmission resource control unit (107) of the radio communication device (SR initiator) (100) determines transmission resources for an SR signal to be transmitted by means of SR to a second BSS other than a first BSS to which the radio communication device (100) belongs on the basis of radio quality information transmitted from other radio communication devices (SR responders) in the first BSS. A radio transmission/reception unit (101) transmits the SR signal by using the determined transmission resources.

Wireless communications systems and methods related to uplink (UL) communications in a wireless network are provided. In some instances, a wireless communication device is configured to: transmit, to a second wireless communication device, a transmission grant indicating a transmission period; transmit a configuration indicating a plurality of reference signal symbols within the transmission period and an association between a plurality of starting locations and the plurality of reference signal symbols; monitor, in response to the transmission grant, for a communication signal from the second wireless communication device in the transmission period; and identify, upon detection of the communication signal, a starting location of the communication signal from among the plurality of starting locations within the transmission period.

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for narrowband communications using frequency hopping in an unlicensed frequency band. In some aspects, a base station (BS) and a user equipment (UE) may communicate with one another over a sequence of unique frequency sub-bands of a frequency hopping pattern. In some instances, the BS and the UE may switch from a current frequency sub-band to another frequency sub-band based on a number of unsuccessful attempts to gain access to the current frequency sub-band. In some other instances, the BS and the UE may communicate data using configured grant (CG) resources based on a number of unsuccessful attempts to gain access to the current frequency sub-band.

The present disclosure relates to a wireless communication system, and specifically, a method and an apparatus therefor, the method comprising: receiving at least one PDSCH, wherein each PDSCH belongs to one of two PDSCH groups; receiving DCI for scheduling a PUSCH, wherein the DCI includes a single DAI related to only one of the two PDSCH groups; and transmitting the control information including an A/N codebook for at least one of the two PDSCH groups.

Methods, systems, and devices for wireless communications are described. A receiving device (e.g., a base station and/or a user equipment) may receive, over a control channel, a first control signal identifying first scheduling information for a data transmission to the receiving device. The receiving device may determine a number of resource elements of a shared channel for a second control signal based at least in part on a first modulation and coding scheme (MCS) table associated with the second control signal. The receiving device may receive, over the resource elements of the shared channel and based at least in part on the first control signal, the second control signal identifying second scheduling information for the data transmission. The receiving device may decode the second control signal based at least in part on the first MCS table.

Methods, systems, and devices for wireless communications are described. In a first example, the user equipment (UE) may receive sidelink control information scheduling resources for a sidelink data transmission spanning a set of tones and indicating a demodulation reference signal (DMRS) pattern. The UE may identify that each tone of the set of tones is configured to carry a DMRS for a symbol of the DMRS pattern and may receive the sidelink data transmission based on the symbol of the DMRS pattern carrying the DMRS for each tone. In a second example, the UE may receive control signaling indicating a configuration for a non-overlapping relationship between a first resource for receiving a DMRS and a second resource for receiving a phase tracking reference signal. The UE may receive the DMRS over the first resource and the phase tracking reference signal over the second resource based on the non-overlapping relationship.