364 results about "Channel occupancy" patented technology

A first wireless device receives a radio resource control (RRC) message comprising a first configuration parameter indicating a sidelink priority threshold value. The first wireless device receives, from a second wireless device, a sidelink control information (SCI) comprising a channel occupancy time (COT) sharing indication indicating a COT with a duration starting from a first slot. The COT is initiated using a first type of channel access procedure. The first wireless device determines simultaneous transmissions scheduled in a carrier and within the COT. The simultaneous transmissions comprise an uplink transmission on an uplink and a sidelink transmission, of a multi-consecutive slots transmission (MCSt), on a sidelink. The first wireless device determines to transmit the sidelink transmission based on a priority value of the sidelink transmission being smaller than the sidelink priority threshold value and transmits the sidelink transmission within the COT using a second type of channel access procedure.

A wireless communication method. An initiating user equipment (UE) performs channel occupancy time (COT) initiating for a COT based on a channel access scheme and transmits sidelink data and sidelink control information within the COT. A responding UE receives the sidelink data and sidelink control information within the COT and performs a channel access scheme to use the shared COT. The responding UE transmits a sidelink hybrid automatic repeat request (HARQ) feedback in response to the sidelink data. The initiating receives the sidelink HARQ feedback.

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 method of radio communicating between a radio device and a network node of a radio access network, RAN, using a temporal radio resource associated with a channel occupancy time, COT. The method is performed by the radio device or initiated by the radio device by at least one of: determining if a first COT is initiated by the radio device; determining if a second COT is initiated by the network node; and radio communicating with the network node in the temporal radio resource associated with the first COT or the second COT depending on the determinations, wherein determinations are based on information in a DCI message.

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.

A user equipment (UE) is configured to share sub-channel resources from among available sidelink channel resources with second UEs. The device transmits a sidelink channel occupancy sharing indicator that enables at least two devices to transmit data utilizing available sidelink channel resources within a channel occupancy duration. The sidelink channel occupancy sharing indicator includes a value for a selected listen before talk (LBT) type from among multiple LBT types for channel sensing. The LBT type signals, to a second UE receiving the sidelink channel occupancy sharing indicator, which LBT procedure to utilize before accessing resources identified by the sharing indicator. The UE allocates the available sidelink channel resources to the at least two second UEs to enable multiple devices to cooperatively share available sidelink channel resources via non-overlapping time or frequency domain usage in order to achieve a channel occupancy threshold level of resource utilization in an unlicensed spectrum.

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.

The invention relates to the technical field of wireless communication networks, in particular to a vehicle-mounted multi-device Bluetooth communication cooperative management system, which comprises a connection priority scheduling module, a dynamic channel allocation module, an interference suppression optimization module, a load balancing adjustment module and a frequency switching coordination module. According to the invention, through extracting the device connection state and the communication requirement, comparing the communication priority in real time, improving the connection scheduling efficiency, and dynamically adjusting the bandwidth and the power in combination with the load and the channel occupation, the channel is prevented from being occupied by a single device for a long time, the channel utilization rate is improved, the interference abnormal device combination is rapidly identified when the interference occurs, and the interference suppression is executed; the method is advantaged in that interruption caused by signal conflicts is reduced, flow redistribution is carried out on high-load equipment through load analysis, uneven communication pressure is alleviated, a frequency switching path is optimized, delay and interruption caused by unreasonable switching are reduced, stable connection, resource balance and interference suppression under multi-equipment concurrent communication are realized, and communication efficiency is improved.

Methods, systems, and devices for wireless communication are described. In some systems, a sidelink user equipment (UE) may prioritize multiple sidelink feedback channels for transmission via at least partially overlapping time resources. The UE may prioritize sidelink feedback channels according to prioritization parameters, where each prioritization parameter may be associated with a respective likelihood of success of a listen before talk (LBT) process for a respective sidelink feedback channel. The UE selects a subset of sidelink feedback channels based on the prioritization, and may perform one or more LBT procedures to access a shared radio spectrum band for transmission of the subset of sidelink feedback channels. The UE may transmit a subset of sidelink feedback channels during one or more channel occupancy time intervals of one or more successful LBT processes based on performing the one or more LBT processes.

This application discloses a method for information transmission with a shared Channel Occupancy Time (COT) and a communications device. When performed by a first device, the method includes: sending indication information to a second device; where the indication information is used to indicate a power detection threshold for COT sharing or a service type, and different power detection thresholds for COT sharing correspond to different service types.

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.

Configured grant (CG) channel occupancy time (COT) sharing procedure is disclosed. A user equipment (UE) sharing a COT may indicate in the uplink control indicator (UCI) the remaining COT duration, an offset indication identifying where the uplink transmission is expected to end, and a channel access priority class (CAPC) which may be used by the base station to determine which type of data may be included in downlink transmissions in the shared COT. Where the energy detection (ED) threshold has not been configured for COT sharing, the UE may reduce the information included in the UCI. The base station may alternatively configured which information for the UE to include in the UCI for potential COT sharing. The COT sharing information may further be compressed by coding such information into tables or leveraging knowledge of transmission characteristics, such as configured end points.

A reporting method is performed by a terminal device, and includes: reporting a radio link failure report (RLF-report) to a network-side device in response to triggering the RLF-report, wherein the RLF-report carries at least one of received signal strength indicator (RSSI) information or channel occupancy (CO) information.

Embodiments of the present disclosure relate to methods and apparatuses for sidelink synchronization signal block (S-SSB) transmission in an unlicensed spectrum. According to an embodiment of the present disclosure, a user equipment (UE) can include: a processor configured to: obtain configuration information for S-SSB in an unlicensed spectrum based on configuration or pre-configuration, wherein the configuration information includes at least one of the following: a first configuration associated with a time interval between adjacent S-SSB occasions sharing a same channel occupancy time (COT); a second configuration for performing listen before talk (LBT) type 2; or a third configuration for performing LBT type 1; and perform an LBT procedure associated with an S-SSB occasion based on the configuration information; a transmitter coupled to the processor and configured to transmit an S-SSB on the S-SSB occasion in response to the LBT procedure being successful; and a receiver coupled to the processor.

A method of transmitting sidelink synchronization signal block (S-SSB) implemented by a user equipment (UE). The method includes determining whether a time to transmit the S-SSB has been reached. The method also includes determining whether a first channel occupancy time is in progress. In response to a determination that the first channel occupancy time is not in progress, the method includes transmitting the S-SSB without the first channel occupancy time sharing channel access.

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.

Mechanisms for directional channel occupancy monitoring for a frequency band among multiple networks are provided. In one aspect, a method of wireless communication includes monitoring, in a shared frequency band in a plurality of beam directions, for signals associated with one or more wireless networks different from the first wireless network. The monitoring includes: detecting, in the shared frequency band and in at least a first beam direction of the plurality of beam directions, a first signal associated with a second wireless network; and up-dating a channel occupancy list to indicate that at least a portion of the shared frequency band is occupied in at least the first beam direction. The method also includes transmitting, in the shared frequency band, a second signal in a second beam direction of the plurality of beam directions based on the channel occupancy list.

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.

Provided are a channel access method and apparatus and a communication device. The method includes: a first device sends a first frame, the first frame comprising a first field, and the first field being used for indicating a channel occupancy time of a first channel; the first field is used for a second device to set or update a network allocation vector (NAV), and the NAV is used for the second device to determine a busy time of the first channel; all or part of the channel occupancy time is used for a first type of devices or a third device to perform communication on the first channel, and the third device belongs to the first type devices.

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 relate to estimating occupancy of a wireless communication channel. A first user equipment (e.g., a first sidelink device) may transmit to a second user equipment (e.g., a second sidelink device) via one or more subchannels allocated for device-to-device communication. The second user equipment may also transmit to the first user equipment via one or more of the subchannels. To mitigate interference on the subchannels, the second user equipment may measure received signal strength on the subchannels to estimate the occupancy of the subchannels (e.g., by calculating a channel busy ratio). In addition, the second user equipment may account for signal leakage from a first subchannel (e.g., on which the first user equipment is transmitting data) onto a second subchannel. As a result, subchannels that may otherwise be indicated as occupied due to leakage may instead by indicated as unoccupied, thereby improving the accuracy of the channel occupancy estimation.

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.

A method and an apparatus for STR in a wireless LAN that supports multi-links are disclosed. An operating method of a first communication node comprises the steps of: transmitting a first frame to a second communication node through a first link from among multi-links; receiving, from the second communication node, a response frame for the first frame through the first link; checking a channel occupancy time in a second link from among the multi-links on the basis of first information included in the response frame; and performing a sensing operation in a preset section after the end of the channel occupancy time in the second link.

A method is provided for initiating a sidelink operation between a first wireless device and a second wireless device in an unlicensed spectrum. The method includes steps of (a) receiving, at the first wireless device, first configuration parameters of a sidelink bandwidth part (BWP) for the sidelink operation, including a channel occupancy time (COT) signal for a COT sharing, (b) obtaining, after the step of receiving, second configuration parameters for a transmission sidelink resource pool, including at least one priority value for the COT sharing, (c) determining (i) a sidelink transmission of the sidelink operation from the first configuration parameters, and (ii) a priority level of the sidelink transmission from the second configuration parameters, (d) decoding a sidelink control information (SCI) to indicate an offset value and a COT duration for the COT sharing, and (e) transmitting the sidelink transmission and the SCI to the second wireless device.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine whether a physical sidelink feedback channel (PSFCH) transmission is scheduled during a channel occupancy time (COT). Accordingly, the UE may transmit the PSFCH transmission using a first set of resources based at least in part on determining that the PSFCH transmission is scheduled outside the COT. Alternatively, the UE may transmit the PSFCH transmission using a second set of resources based at least in part on determining that the PSFCH transmission is scheduled in the COT. Numerous other aspects are described.

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.

A beam measurement method, an apparatus, and a system, which are applicable to an FR2 sidelink communication system. The beam measurement method includes: determining a channel occupancy ratio and a channel busy ratio of each of N beams, where N is a positive integer greater than or equal to 1; determining a first beam from the N beams based on the channel occupancy ratio and the channel busy ratio of each beam; and sending first sidelink information by using the first beam. In the method, channel measurement is performed on each beam, to determine the channel occupancy ratio and the channel busy ratio of each beam and further select a beam used for information transmission. Channel statuses of beams in different directions can be distinguished, thereby improving channel measurement accuracy.