205 results about "Channel occupancy" patented technology

Apparatus and methods are provided for COT sharing in sidelink unlicensed communication systems. In novel aspect, an COT initiating UE shares one or more SL resources within a COT to one or more responding UEs. In one embodiment, the responding UE is a target receiver of the COT initiating UE. In one embodiment the responding UE uses the shared resources for transmission that the COT initiating UE is one of the target receivers. In one embodiment, COT sharing information comprises COT time and frequency location information, shared COT starting offset information, remaining COT duration information, one or more resource block (RB) set(s) in the COT, channel access type, channel access priority type (CAPC) level, and ID information. In one embodiment, the COT sharing information is carried in a 1st-stage SCI, a 2nd-stage SCI, a combination of a 1st-stage SCI and 2nd-stage SCI, or a MAC-CE. In one embodiment, the responding UE performs an channel access before using the shared COT resource. The channel access type is (pre-) configured based on a transmission gap or indicated by the COT initiating UE.

A user equipment (UE) may transmit a configured-grant uplink control information (CG-UCI) to a base station during a channel occupancy time (COT) initiated by the UE in a shared spectrum, the CG-UCI comprising COT sharing information, the COT sharing information indicating, at least, an index value corresponding to a combination of: an indication of an offset to a beginning of a downlink transmission opportunity during the COT; an indication of a duration of the downlink transmission opportunity during the COT; and an indication of a channel access priority class (CAPC) value used by the UE to initiate the COT. The base station may transmit a downlink transmission to the UE within the downlink transmission opportunity and in accordance with the COT sharing information in the transmitted CG-UCI. Apparatuses are also disclosed.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may transmit, in a first slot within a channel occupancy time (COT), a first communication; determine whether one or more transmission criteria are satisfied for transmission of a second communication in a second slot within the COT; and selectively transmit the second communication in the second slot within the COT based at least in part on a result of determining whether the one or more transmission criteria are satisfied. Numerous other aspects are provided.

A method for resource selection is provided. The method for resource selection includes: receiving channel occupancy time (COT) sharing information from a second UE; determining, according to at least one of the COT sharing information or a preset threshold, whether a first UE can share a COT indicated by the COT sharing information; and selecting, in a case where the first UE can share the COT, a transmission resource of the first UE from a time window that the first UE can use within the COT.

A wireless communication method for use in a wireless terminal is disclosed. The method comprises transmitting, to a wireless network node, a channel occupancy time (COT) sharing indication associated with sharing a COT initiated by the wireless terminal, wherein the COT sharing indication comprises at least one of: a starting point, a duration or an available resource block set of the COT.

Various aspects of the present disclosure relate to receiving sidelink control information (SCI) allocating resources for a physical sidelink shared channel (PSSCH) transmission, the SCI including a field indicating a channel occupancy time (COT) duration of a first COT, and transmitting hybrid automatic repeat request (HARQ) feedback in a physical sidelink feedback channel (PSFCH) transmission within the COT duration without initiating another COT based on the SCI. A receiving UE may determine the COT duration indicated by the SCI as shared for the transmission of the HARQ feedback on the PSFCH.

A channel occupancy time determination method is applied to a first communication node. The method includes, in response to the first communication node initiating no channel occupancy, detecting information sent by a second communication node; and determining, according to the detection result, channel occupancy time (COT) for data transmission.

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.

Aspects of the present disclosure include methods, apparatuses, and computer readable media for receiving sidelink information from a first transmitting UE, receiving channel occupancy time (COT) system information (COT-SI) associated with a second transmitting UE, identifying one or more COT resources based on the COT-SI, and transmitting feedback information associated with the sidelink information via the one or more COT resources.

According to some embodiments, a method is performed by a wireless device for operation with shared spectrum channel access, wherein a first plurality of fixed frame periods (FFPs) are associated with the wireless device and a second plurality of fixed frame periods (FFPs) are associated with a network node and wherein each FFP comprises an idle period with no transmission and a channel occupancy time (COT) for potential transmission. The method comprises initiating a COT in one of the FFPs of the first plurality of FFPs and upon successful initiation of the COT, transmitting uplink data from the beginning of the COT.

Provided are a method for a first device to perform wireless communication and a device supporting same. The method may comprise the steps of: acquiring configuration information related to a resource pool; triggering resource selection; determining a selection window on the basis of the resource selection being triggered; determining at least one candidate value for the number of slots for multi-slot based transmission on the basis of a channel occupancy time (COT) duration; selecting an N value on the basis of the at least one candidate value; and determining a candidate multi-slot resource in the resource pool in the selection window on the basis of the N value.

Disclosed are techniques for performing wireless communication. In some aspects, a first user equipment (UE) may determine that one or more physical sidelink feedback channel (PSFCH) instances are scheduled during a channel occupancy time (COT) corresponding to a sidelink transmission by the first UE to a second UE. In some examples, the first UE may transmit a COT maintenance signal during the one or more PSFCH instances, wherein at least one PSFCH symbol in the COT maintenance signal has a cyclic prefix extension.

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.

The method can be applied to the field of communication, and comprises the following steps: when a first device opens a first channel and a second channel in time to communicate with a second device and a third device respectively, determining a target mode from a plurality of candidate modes according to state information of the first device; the first channel and the second channel are two channels with the same frequency band and different frequencies; and determining a time length ratio of the first channel and the second channel opened by the first device according to the target mode. The time length ratio of the first channel and the second channel determined by the method is more in line with the communication demand of the first device, and the probability of congestion or long-time idle state of the first channel and the second channel is reduced.

This invention relates to beam switching following a Listen-After-Speak (LBT) procedure. Apparatus, methods, and systems for performing beam switching after an LBT procedure are disclosed. One apparatus (500) includes a processor (505) and a transceiver (525) operable on unlicensed spectrum, wherein the transceiver (525) supports multiple device panels. The processor (505) performs (805) a first Listen-After-Speak (“LBT”) procedure using omnidirectional sensing to obtain a first Channel Occupancy Time (“COT”), and in response to a successful LBT, performs (810) a first uplink transmission of a first Transport Block (“TB”) during the first COT and using a first device panel. Here, the first uplink transmission uses a first portion of the first COT. The processor (505) performs (815) a directed LBT procedure for a second device panel to obtain the remainder of the first COT.

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.

A wireless transmit / receive unit (WTRU) is configured to receive information that indicates a first number of nominal repetitions and a first number of symbols for transmission in each of the first number of nominal repetitions. The WTRU is configured to determine a set of symbols associated with a first nominal repetition of the first number of nominal repetitions. The WTRU is configured to transmit, based on the set of symbols associated with the first nominal repetition, a second number of actual repetitions in symbols associated with the first nominal repetition. The second number of actual repetitions and the symbols used to transmit the second number of actual repetitions are based on an occurrence of an event during the set of symbols associated with the first nominal repetition and based on whether a channel occupancy is initiated by the WTRU or whether the channel occupancy is initiated by a network entity.

Provided is a method for transmitting a request message. The method is performed by a terminal device. The method includes: transmitting a first request message, wherein the first request message is used to request sharing of a channel occupancy time (COT) of at least one other terminal device.

Methods and apparatuses for channel occupancy indication on a sidelink (SL) in a wireless communication system. A method of operating user equipment (UE) includes receiving a SL control information (SCI) format over a sidelink channel; determining, from the SCI format, at least one of: time domain information for a channel occupancy, frequency domain information for the channel occupancy, and a SL channel access procedure. The method further includes performing the SL channel access procedure before a sidelink transmission; and transmitting, upon successfully performing the sidelink channel access procedure, the SL transmission over the SL channel within the channel occupancy based on the time domain information or the frequency domain information for the channel occupancy.

A communication method and terminals are provided. The communication method includes the following. A first terminal receives request information of first channel occupancy time (COT) from a second terminal. The first terminal transmits first response information to the second terminal, where the first response information includes first acknowledgement information and / or second acknowledgement information. The first acknowledgement information indicates or acknowledges that the first terminal is to initiate the first COT, and the second acknowledgement information indicates or acknowledges that the first terminal is not to initiate the first COT.

Methods and apparatuses for signaling unused channel occupancy time (COT) to a gNB for COT sharing among other UEs are disclosed. Upon determining that a portion of the maximum COT (MCOT) provided to a UE will not be used, the UE can generate COT sharing information for transmission back to the gNB. The COT sharing information identifies the starting point and duration (e.g., number of consecutive slots) of the unused portion of the MCOT. This information is then encoded into a configured grant uplink control information (UG-UCI) and transmitted to the gNB as part of an uplink transmission. In aspects, the unused portion can be partially through a slot. In such cases, the starting symbol of the unused portion or the ending symbol of the used portion can also be encoded into the uplink transmission. In this way, the unused COT is not wasted, but rather used for other purposes by the gNB.

Apparatus, methods, and systems for beam switching after the LBT procedure are disclosed. An apparatus (500) includes a processor (505) and a transceiver (525) operating in the unauthorized spectrum, wherein the transceiver (525) supports a plurality of device panels. The processor (505) executes (805) a first Listen-Before-You-Talk ("LBT") procedure using omnidirectional detection to acquire a first Channel Occupancy Time ("COT") and executes (810) a first uplink transmission of a first transport block ("TB") during the first COT and using a first device panel in response to a successful LBT. Here, the first uplink transmission uses a first portion of the first COT. The processor (505) executes (815) a directional LBT procedure so that a second device panel acquires a remaining portion of the first COT.

The present disclosure relates to a technology for transmitting and receiving a paging message in a new radio-unlicensed (NR-U) environment, and according to an embodiment of the present disclosure, a method performed by a base station (BS) includes scheduling a paging occasion (PO) according to a discontinuous reception (DRX) cycle of user equipment (UE), transmitting DRX-related information including information about the PO and a paging frame (PF) to the UE through radio resource control (RRC) signaling, transmitting a paging message to the UE based on the DRX-related information, and scheduling a next PO based on the PO, wherein the next PO includes a backup PO scheduled by the BS after maximum channel occupancy time (MCOT) has elapsed after the PO, when the UE fails to receive the paging message during the PO.

A vehicle includes a Wi-Fi system for transmitting a signal. The Wi-Fi system includes a channel having a primary subchannel and one or more secondary subchannels. A sensor measures energies of signals in the primary subchannel and in each of the one or more secondary subchannels. A processor determines that the primary subchannel is idle when the energy in the primary subchannel is less than a primary subchannel energy threshold, assigns a score to each of the one or more secondary subchannels based on the secondary subchannel energy, calculates a sum of the scores, and transmits the signal over the channel when the sum of the scores is less than a score threshold.

Example implementations include: a method, apparatus, and computer-readable medium for wireless communication via a lateral link between a first user equipment (UE) and a second UE. The first UE can identify a discontinuous reception (DRX) configuration for direct link communication with the second UE. The first UE can determine the CBR by measuring multiple channel busy ratio (CBR) times within a time window preceding direct link transmission based on the DRX configuration. The first UE can determine whether to perform congestion control for the direct link transmission based on the CBR. The first UE can perform direct link transmission subject to channel occupancy limits.

The present disclosure provides systems, methods, and apparatus, including computer programs encoded on computer storage media, for wireless communications. In one aspect of the present disclosure, a method for wireless communications by a user equipment (UE) includes receiving a first message from a first device. The first device includes an originator of a first channel occupancy time (COT). The method can also include transmitting a second message including a source identity (ID) of the first device. Other aspects and features are also claimed and described.

A method for determining a cyclic prefix extension (CPE) includes: according to transmission type information that a first transmission meets, determining a CPE starting position corresponding to a target transmission resource for the first transmission. The transmission type information includes at least one of the following: belonging to a transmission after a first channel access type; belonging to a transmission after a second channel access type; there being no available shared channel occupancy information; there being one piece of available shared channel occupancy information; there being at least two pieces of available shared channel occupancy information; or belonging to a continuous multi-slot transmission.

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.

This application provides a communication method and apparatus that may be applied to resource sharing in channel occupancy time in sidelink communication. The method includes: A first terminal apparatus determines first channel occupancy time COT. The first terminal apparatus determines to share a first resource based on a preset priority threshold, where a time domain position of the first resource is in the first COT. The first terminal apparatus sends first indication information to at least one second terminal apparatus, where the first indication information is for sharing the first COT, and the first indication information includes one or more of the priority threshold, resource information of the first COT, and sharing and licensing information of a PSFCH resource in the first COT. According to the method, COT sharing of an unlicensed spectrum resource can be implemented on a sidelink.