23 results about "Unlicensed band" patented technology

A method performed by a first device and a device supporting same in a wireless communication system are provided. The method may include: obtaining discontinuous reception (DRX) configuration information a sidelink (SL) DRX hybrid automatic repeat request (HARQ) round trip time (RTT) timer; receiving, from a base station, a downlink control indicator (DCI) for scheduling a SL resource and a physical uplink control channel (PUCCH) on a physical downlink control channel (PDCCH); based on the SL resource, transmitting, to a second device, a first sidelink control indicator (SCI) for scheduling a physical sidelink shared channel (PSSCH) and a second SCIon a physical sidelink control channel (PSCCH); based on the SL resource, transmitting, to the second device, the second SCI including information related to a SL HARQ process, and data on the PSSCH; performing a listen before talk (LBT) for a PUCCH transmission; and based on that a PUCCH resource is configured, and the PUCCH transmission is not performed due to a LBT failure, starting the SL DRX HARQ RTT timer corresponding to the SL HARQ process in a first symbol after a PUCCH resource for a SL HARQ feedback, in the PUCCH resource.

A system and a method are disclosed for determining, by a targeted receiving User Equipment (UE), that a corresponding transmitting UE has a future reserved resource block. The receiving UE may perform a Listen Before Talk (LBT) sensing to identify a time period when an unlicensed channel is unoccupied and can be used by the corresponding transmitting UE for the future reserved sidelink transmission. The receiving UE may transmit a reservation signal for the unlicensed channel to the corresponding transmitting UE, during at least a portion of the time period when the unlicensed channel is unoccupied. Further, the receiving UE may, switch, to a receiving mode prior to or at a reserved slot boundary of the future reserved resource block.

Apparatuses, methods, and systems are disclosed for UE assistance for no-LBT based unlicensed channel access. A processor (305) calculates a combined gain from a combination of an antenna configuration gain and a beamforming gain for at least one transmission beam. The processor (305) determines if the at least one transmission beam can be used for a no-LBT based channel access mechanism in an unlicensed band with or without a channel occupancy duration restriction based on the combined gain. The processor (305) transmits, via a transceiver (325), to a network node, information that indicates whether the at least one transmission beam can be used for a no-LBT based channel access mechanism in an unlicensed band with or without a channel occupancy duration restriction, or whether the network node can apply an LBT-based channel access mechanism, or some combination thereof.

A UE includes an antenna for receiving a first reception signal for wireless LAN communication and a second reception signal for sidelink communication; a radio frequency (RF) front-end for processing the first reception signal and the second reception signal; a first transceiver for the wireless LAN communication, a second transceiver for the sidelink communication, and a processor operably coupled to the first transceiver and the second transceiver, the first reception signal is provided from a second UE to the RF front-end through the antenna, the second reception signal is provided from a third UE to the RF front-end through the antenna, the first reception signal provided to the RF front-end is provided to the first transceiver through a first electrical path, and the second reception signal provided to the RF front-end is provided to the second transceiver through a second electrical path.

Methods and apparatus pertaining to capability reporting in mobile communications are described. An apparatus may establish an association with a collaborative apparatus. The apparatus may transmit a report indicating a capability associated with a transmission mode to a network node. In an event that the transmission mode is enabled, the apparatus may receive a first radio frequency (RF) signal that carries a data signal and is transmitted at a first transmission power by the network node in a first frequency resource within a first channel bandwidth, and receive a second RF signal that carries the data signal and is transmitted at a second transmission power by the collaborative apparatus in a second frequency resource within a second channel bandwidth. The second frequency resource may comprise an unlicensed band.

The present disclosure discloses a method by a terminal transmits an uplink (UL) signal in a wireless communication system. In particular, the method comprises: determining an energy detection (ED) threshold value on the basis of maximum effective isotropic radiated power (EIRP) from among at least one of pieces of first EIRP for at least one first UL signal; acquiring channel occupancy on the basis of the ED threshold value; and, within the channel occupancy, (i) transmitting the at least one first UL signal on the basis of each of at least one of pieces of first EIRP for each of the at least one first UL signal, and (ii) transmitting a second UL signal on the basis of second EIRP, wherein the second EIRP is less than or equal to the maximum EIRP.

According to various embodiments, a first user equipment (UE) include a transceiver to transmit and receive a wireless signal; and a processor connected to the transceiver, wherein the processor is configured to receive first side link control information (SCI) from a second UE through a physical side link control channel (PSCCH) configured in unlicensed band, receive a second SCI from the second UE through a physical side link shared channel (PSSCH) determined based on the PSCCH, wherein the first SCI and the second SCI are configured in different formats, based on at least one of the first SCI and the second SCI, identify information for performing side link communication with the second UE in the unlicensed band, and receive, based on the identified information, data from the second UE through a side link communication path between the first UE and the second UE.

Example embodiments of the present disclosure relate to an apparatus, a method, a device, and a computer readable storage medium for hybrid automatic repeat request (HARQ) feedback for adjusting a contention window size for communication in an unlicensed band. In example embodiments, if a failure of a transmission in an unlicensed band is determined, the apparatus determines a cause of the failure of the transmission based on reception information associated with a transmission collision. Then, the apparatus adjusts a size of a contention window for a listen before talk procedure.

Example embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media of traffic priority-based energy detection threshold adaption in unlicensed band. The method comprises determining a target traffic priority for transmitting data from a first device to a second device; obtaining at least one candidate configuration parameter of an energy detection threshold for channel clearance assessment for the target traffic priority; determining a target configuration parameter for transmitting the data based on the at least one candidate configuration parameter; and transmitting the data to the second device based on the target configuration parameter. In this way, the maximum EDT can be associated with the traffic priority, to facilitate flexible channel access requirement of different uplink traffic priority.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) can select, for a sidelink transmission on an unlicensed band and associated with a medium access control (MAC) protocol data unit (PDU), one or more candidate resources of a set of candidate resources within an adaptive contention window (ECW). The UE can adjust at least one parameter of the adaptive ECW based at least in part on a channel access output associated with the one or more candidate resources to determine an adjusted at least one parameter. The UE can transmit the MAC PDU using the one or more candidate resources or additional one or more candidate resources, where the additional one or more candidate resources are selected based at least in part on the adjusted at least one parameter. Numerous other aspects are provided.

A terminal includes: a control unit configured to determine whether or not to employ short control signaling (SCS) transmission in an unlicensed band; a transmitting unit configured to carry out transmission without performing listen before talk (LBT) when the control unit determines to employ SCS transmission; and a receiving unit configured to perform LBT when the control unit determines not to employ SCS transmission. The transmitting unit is configured to carry out transmission, when the control unit determines not to employ SCS transmission and the receiving unit ends LBT successfully.

Proposed is an operating method of a first device (100) in a wireless communication system. The operating method may comprise the steps of: obtaining, on the basis of decoding for SCI, information about a first resource reserved by a second device; obtaining information about a COT section; selecting a second resource to transmit the information about the COT section, wherein the second resource is a resource N slots before the first resource; and transmitting, on the basis of the second resource, the information about the COT section to the second device.

An LBT method and apparatus are disclosed for a WTRU and gNB. A method may comprise receiving a gNB beam direction schedule and an LBT measurement configuration. The WTRU may switch a receiver so as to receive a beam based on the beam direction schedule and monitor for a DCI. The WTRU may be configured to determine whether there is a transmission for the WTRU and if there is, the transmission may be received. The transmission may be a DCI for an uplink transmission of the WTRU. A WTRU may be configured to receive the gNB beam direction schedule and the LBT measurement configuration at a start of an MCOT.

An operating method of a first device (100) in a wireless communication system is presented. The method may comprise the steps of: acquiring information related to a resource block (RB) set, the RB set including a physical sidelink feedback channel (PSFCH) resource, and the PSFCH resource including at least one dedicated physical resource block (PRB) and at least one common PRB, which are included in a bandwidth of 1 MHz; and transmitting, on the basis of the at least one dedicated PRB, hybrid automatic repeat request (HARQ) feedback information on the basis that the at least one dedicated PRB and the at least one common PRB are included in the bandwidth of 1 MHz.

A network node and a method performed by the network node are provided. According to an embodiment, a method performed by a network node is provided. The method comprises obtaining prediction information on an availability of an unlicensed band based on historical data of the unlicensed band. The method comprises selecting transmission resources of the unlicensed band based on the prediction information. The method comprises determining a number of data packets capable of being allocated to the transmission resources based on the prediction information. The method comprises transmitting the data packets on the transmission resources according to the determined number of data packets capable of being allocated to the transmission resources.

A communication device includes a control unit. The control unit receives an instruction to perform channel sensing in an unlicensed band, from a base station apparatus. The control unit performs the channel sensing in a channel occupancy time in which the instruction is received. The control unit transmits second uplink control information that can be multiplexed with first uplink control information and that indicates a result of the channel sensing, to the base station apparatus, in the channel occupancy time.

Provided are a method by which a first device performs wireless communication, and a device for supporting same. The method may comprise the steps of: acquiring configuration information for dynamic channel access; acquiring configuration information for semi-static channel access; performing the dynamic channel access or the semi-static channel access on the basis of information acquired by the first device; transmitting, to a second device, on the basis of success in the dynamic channel access or the semi-static channel access, first sidelink control information (SCI) for scheduling of a physical sidelink shared channel (PSSCH) and second SCI through a physical sidelink control channel (PSCCH); and transmitting the second SCI and data to the second device through the PSSCH.

Disclosed are a method and device for sidelink communication in an unlicensed band. The method of a first terminal comprises the steps of: receiving SCI from a second terminal; receiving data scheduled by the SCI from the second terminal; generating an HARQ-ACK for the data; and conducting a first LBT operation for transmission of the HARQ-ACK in a first PSFCH occasion among N PSFCH occasions set in the first terminal.

A method for performing wireless communication by a first device and a device supporting same are provided. The method may comprise the steps of: obtaining information associated with a recovery timer for recovery of a consistent sidelink (SL) listen before talk (LBT) failure; performing LBT on a RB set; on the basis that the number of failures of the LBT reaches a first threshold, triggering the consistent SL LBT failure; starting the recovery timer; and on the basis that the recovery timer expires, cancelling the triggered consistent SL LBT failure.

A method and an apparatus for sidelink communication based on start positions in an unlicensed band are disclosed. The method of a first UE comprises the steps of: receiving configuration information about a start symbol from a base station; identifying a plurality of start symbols on the basis of the configuration information; performing a first LBT operation at a first start symbol from among the plurality of start symbols in a first slot; and, if the first LBT operation at the first start symbol fails, performing a second LBT operation at a second start symbol from among the plurality of start symbols in the first slot.

The present invention provides: a resource allocation method for uplink transmission onto an unlicensed band in a wireless communication system, particularly, in cellular wireless communication system; and a method, a device, and a system for transmitting scheduling information in a base station and for performing reception and transmission in a terminal. In addition, provided are: a method for efficiently transmitting a signal in a wireless communication system, particularly, in a cellular wireless communication system; and a device therefor, and another objective of the present invention is to provide: a method for efficiently sensing a channel and transmitting a signal / channel in a specific frequency band (for example, unlicensed band); a method for receiving the corresponding signal / channel; and a device therefor.

A method of performing wireless communication by a first device and a device supporting the method are provided. The method may comprise the steps of: transmitting, to a second device, information on the latency bound of sidelink (SL) channel state information (CSI) reporting; transmitting, to the second device, first sidelink control information (SCI) including first CSI request information triggering a first CSI report; and receiving the first CSI report from the second device within the latency bound of the SL CSI reporting. Here, on the basis of communication between the first device and the second device being performed in a shared spectrum, the first device may be allowed to trigger a second CSI report for the second device within the latency bound of the SL CSI reporting.

A terminal includes: a reception unit configured to receive, from a base station, DCI (Downlink Control Information) that schedules PUSCH (Physical Uplink Shared Channel) in an unlicensed band and a parameter related to frequency hopping; and a transmission unit configured to perform transmission to the base station using a plurality of RB (Resource block) sets by applying frequency hopping to the PUSCH, based on the parameter.