143 results about "Unlicensed band" patented technology

Provided are a method for a first device carrying out wireless communication, and a device supporting same. The method may comprise the steps of: acquiring information related to a plurality of physical sidelink feedback channel (PSFCH) occasions; acquiring information related to a slot offset between PSFCH-physical uplink control channel (PUCCH); transmitting, to a second device via a physical sidelink control channel (PSCCH), first sidelink control information (SCI) for scheduling second SCI and a physical sidelink shared channel (PSSCH); transmitting the second SCI and data to the second device via the PSSCH; generating HARQ feedback information for the plurality of PSFCH occasions; and reporting the HARQ feedback information to a base station on the basis of a PUCCH resource.

Embodiments of the present disclosure relate to method, device and computer readable media for communications. A first device performs a first type LBT procedure in unlicensed band. In response to a successful performing of the first type LBT procedure, the first device transmits, to a second device, a first sidelink positioning reference signal (PRS) sequence in the unlicensed band for ranging between the first device and the second device, and / or for positioning of the first device. The first sidelink PRS sequence is associated with the first type LBT procedure and / or a second type LBT procedure to be performed by the second device for transmitting a second sidelink PRS sequence in the unlicensed band to the first device for the ranging or the positioning.

Systems, methods, and circuitries are provided for a UE performing sidelink (SL) communication in unlicensed spectrum to update contention window size (CWS). In one example, a method includes, during a sidelink (SL) channel occupancy time (COT), transmitting one or more physical sidelink shared channels (PSSCHs) transmissions to one or more respective receiving (RX) UEs according. Each PSSCH includes one or more transport blocks (TBs) and is associated with a channel access priority class (CAPC). The UE updates the CWS for the CAPC based on feedback received with respect to the one or more PSSCHs associated with the CAPC and transmits subsequent PSSCH associated with the CAPC based on the updated CWS.

Proposed is an operation method of a first device (100) in a wireless communication system. The method may comprise the steps of: acquiring information related to one or more first resources; carrying out channel sensing for a channel access procedure (CAP) related to the one or more first resources; and determining whether to trigger a reevaluation procedure or preemption procedure related to the one or more first resources, wherein the reevaluation or preemption of a resource, among the one or more first resources, for which the result of channel sensing for the related CAP is not idle is not transferred to a medium access control (MAC) layer.

A method by which a first device performs wireless communication, and a device for supporting same are provided. The method may comprise the steps of: acquiring information related to a plurality of physical sidelink feedback channel (PSFCH) transmission occasions including a first PSFCH transmission occasion and a second PSFCH transmission occasion; receiving a first physical sidelink shared channel (PSSCH) from a second device; and performing PSFCH transmission on the basis of at least any one of the plurality of PSFCH transmission occasions related to the first PSSCH.

An operating method of a first device (100) in a wireless communication system is presented. The method comprises the steps of: determining a resource configuration method related to transmission resource selection, the resource configuration method being a contiguous configuration or a distributed configuration; and selecting a plurality of transmission resources on the basis of the determined resource configuration method, wherein, on the basis that the resource configuration method is the contiguous configuration, the plurality of transmission resources are selected such that the number of resource block (RB) sets including at least one of the plurality of transmission resources becomes the minimum, and on the basis that the resource configuration method is the distributed configuration, the plurality of transmission resources are selected such that the number of transmission resources included in the same RB set among the plurality of transmission resources becomes the minimum.

Provided are a method by which a first device performs wireless communication and an apparatus supporting same. The method may comprise the steps of: receiving, in a slot, sidelink control information (SCI) including channel occupancy time (COT) sharing information from a second device; and performing second type channel access within a COT duration acquired on the basis of the COT sharing information.

A method and apparatus for channel access in unlicensed band communication are disclosed. The method for a first terminal comprises the steps of: receiving, from a second terminal, shared information of a COT initiated by the second terminal; on the basis of the shared information, determining whether or not an SL transmission by the first terminal may be performed in the COT; and if the SL transmission may be performed in the COT, performing the SL transmission in the COT shared by the second terminal.

A method performed by a first device in a wireless communication system, and a device supporting same are provided. The method may comprise the steps of: obtaining configuration information related to a resource pool; obtaining configuration information related to SL LBT failure recovery, including information related to a maximum number of sidelink (SL) listen before talk (LBT) failures; performing LBT before SL transmission in a first set of resource blocks (RBs) in the resource pool; on the basis of the SL transmission not being performed, increasing an LBT counter by one; triggering a consistent SL LBT failure, on the basis of the LBT counter reaching the maximum number of SL LBT failures; and selecting a sidelink grant from a second set of RBs different from the first set of RBs, on the basis of the triggered consistent SL LBT failure.

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.

Provided are a method for performing wireless communication by a first device and a device supporting the method. The method may comprise the steps of: receiving, from a second device, sidelink control information (SCI) for scheduling a physical sidelink shared channel (PSSCH), via a physical sidelink control channel (PSCCH); receiving, from the second device, information related to a channel occupancy time (COT), via the PSSCH; and performing, within the COT, a sidelink (SL) channel access procedure, on the basis of a time gap between an SL channel related to the COT and a channel to be transmitted by the first device.

Various aspects of the present disclosure relate to hybrid automatic repeat request (HARQ) feedback associated with a physical sidelink shared channel (PSSCH) transmission. In an aspect, a first user equipment (UE) receives, from a second UE, a PSSCH transmission. The first UE determines whether the PSSCH transmission is within a reference duration of a channel occupancy time. HARQ feedback associated with the PSSCH transmission within the reference duration is used for determining a size of a contention window. By implementing the embodiments of the present disclosure, an adjustment of a size of contention window based on HARQ feedback in sidelink unlicensed band can be supported, and transmissions of PSFCH for which the adjustment of the size of the contention window can be guaranteed.

The present invention relates to a method for performing uplink transmission to a base station through an unlicensed cell in a wireless communication system. In particular, the invention provides a method including: receiving, from the base station, an uplink grant scheduling the uplink transmission on one or more subframes; and performing the uplink transmission on the one or more subframes using one of a first type channel access or a second type channel access indicated in the uplink grant, wherein a parameter for the first type channel access is determined according to a priority included in the uplink grant, and wherein when the uplink grant indicates the second type channel access, the priority is a priority used in a downlink channel access of the base station.

A method for multiplexing uplink control information (UCI) for unlicensed band transmission, is performed by a terminal device. The method includes: in response to a time-domain overlap between a configure grant-physical uplink share channel (CG-PUSCH) and a hybrid automatic repeat request acknowledgement (HARQ-ACK) carried on a physical uplink control channel (PUCCH), determining, based on a priority of the CG-PUSCH and a priority of the HARQ-ACK, a multiplexing mode for CG-UCI carried on the CG-PUSCH and the HARQ-ACK; and transmitting information to a network device based on the multiplexing mode, wherein the information transmitted includes at least one of the CG-UCI or the HARQ-ACK.

A method by which a first device performs wireless communication, and a device for supporting same are provided. The method may comprise the steps of: acquiring a plurality of sidelink (SL) resources including a first SL resource and a second SL resource; transmitting, on the basis of the first SL resource, through a physical sidelink control channel (PSCCH), second sidelink control information (SCI) and first SCI, which is for the scheduling of a physical sidelink shared channel (PSSCH); and transmitting, on the basis of the first SL resource, through the PSSCH, data and the second SCI, which includes information related to a hybrid automatic repeat request (HARQ) process. Here, whether an initial transmission or a retransmission is permitted on the second SL resource can be based on whether a plurality of SL resources are included in an unlicensed band or whether a timer is being driven.

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.

Examples are described for a device to collaborate in an unlicensed band in mobile communications. A first communication device may receive a configuration message including a first uplink transmission configuration and a second uplink transmission configuration for signal transmission in at least a first frequency band. The first uplink transmission configuration and the second uplink transmission configuration indicate transmission parameters. The first communication device may transmit a first set of coded bits to the network node over the first frequency band and transmit a second set of coded bits to the second communication device over an unlicensed frequency band, the second set of encoded bits is configured to be transmitted to the network node over the first frequency band based on the first uplink transmission configuration by the second communication device upon determining that transmission in an unlicensed frequency band between the first communication device and a second communication device in the vicinity of the first communication device is available.

A method by which a first device performs wireless communication and a device supporting same are provided. The method may comprise the steps of: acquiring information related to a resource for a sidelink-synchronization signal block (S-SSB); acquiring information about a first time domain for a first cyclic prefix extension (CPE) related to S-SSB transmission; performing the first CPE during the first time domain before the S-SSB transmission; and performing the S-SSB transmission on the basis of the resource.

Embodiments of the present disclosure relate to device, method, apparatus and computer readable storage medium of power control of spatial reuse for supporting TSC in the unlicensed band. The method comprises in accordance with a determination that a sounding packet is transmitted from a second device, determining CSI of channels between the second device and the third device; determining, at least partially based on the CSI, an applicable transmitting power for a first transmission from the first device to a fourth device during a second transmission for a reception of the feedback of the at least one packet sent from a third device to the second device; and performing the first transmission based on the applicable transmitting power during the second transmission. In this way, a transmission of DL TSC packets that has a time scheduling requirement in contrast with the spatial reuse time window can be achieved. Meanwhile, the harmful interference to NOTSN AP during the Block Acknowledgement reception can be avoid.

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.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may transmit first sidelink control information (SCI) indicative of a first reservation of a sidelink resource corresponding to an unlicensed sidelink band. The UE may receive second SCI indicative of a second reservation of the sidelink resource. The UE may determine, based on at least one channel occupancy time (COT) associated with at least one of the first UE, the second UE, or an additional UE, a preemption status corresponding to the second reservation relative to the first reservation. The UE may perform a sidelink resource allocation operation based on the preemption status. Numerous other aspects are described.

The disclosure of the present specification provides a UE configured to operate in a wireless system, the UE comprising: a transceiver; a processor operatively connectable to the transceiver, where the processor is configured to: determine a maximum output power based on the MPR; the S-SSB is transmitted via an unlicensed band based on the maximum output power, where the power level of the UE is power level 5, where the value of the MPR is based on RB allocation, where the RB allocation is a configuration for sub-bands used for transmitting the S-SSB, where each of the sub-bands is 20 MHz, where the RB allocation is an external RB set configuration, where the value of the MPR is 12.5 dB or less, where each of the sub-bands is 20 MHz. Based on the RB allocation being an internal RB set configuration, the value of MPR is 9.5 dB or less.

A method and an apparatus for transmitting / receiving a signal by using a variable band width in a communication system are disclosed. An operating method of a terminal comprises the steps of: receiving, from a base station, first configuration information about one or more guard bands of an unlicensed band; confirming the one or more guard bands configured in the unlicensed band on the basis of the first configuration information; and confirming a plurality of RB sets configured in the unlicensed band on the basis of the one or more guard bands. Therefore, performance of the communication system can be improved.

A method for operating a first device 100 in a wireless communication system is proposed, the method including the steps of: determining N PSFCH transmissions to transmit among the at least one PSFCH transmission based on a sum of powers for performing at least one PSFCH transmission on a shared spectrum being greater than a maximum transmit power of the first device, wherein a transmit power of a transmission on at least one first PRB in a first interlace is taken into account in a total transmit power associated with the plurality of PSFCH transmissions considered in determining the N PSFCH transmissions; and performing the N PSFCH transmissions.

Some embodiments of the present disclosure provide a channel access mechanism configured in a millimeter wave shared spectrum mobile communication network. The channel access mechanism is to be used by a user equipment (UE) and a serving node in a serving cell of the UE. The configuration can use a single cell-specific higher layer parameter or a combination of two cell-specific higher layer parameters. The parameters can configure the UE and the node to perform channel sensing before transmitting to initiate channel occupancy. Alternatively, the UE and the node can be configured to transmit directly without channel sensing. The parameters can configure a receiver (UE or node) to perform channel sensing before transmitting a channel clear indication to a transmitter as part of a channel access procedure to initiate channel occupancy. Alternatively, the parameters can configure the UE and the node to receive without channel sensing.

A terminal includes: a reception unit configured to perform an LBT (Listen before talk) for a transmission signal in an unlicensed band; and a transmission unit configured to transmit the transmission signal to another terminal in a case where the LBT is successful. When the reception unit receives a channel or a signal that is not a COT initiating transmission from the another terminal during a COT (Channel occupancy time) that is obtained by the another terminal, the transmission unit performs a transmission to the another terminal during the COT.

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.