Wireless communication device and method

Abstract

The present application provides an apparatus and method for wireless communication. The method is performed by a user equipment (UE) and includes: performing a channel access process before sending an uplink transmission, wherein the channel access process is related to at least one of the following: an energy detection threshold (EDT) and a sensing beam. This can solve the problems in the prior art, provide channel access related indications for more than one scheduled uplink transmission through the same downlink control indicator (DCI) in a shared spectrum, reduce signaling overhead, provide good communication performance and / or provide high reliability.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the international application with application number PCT / IB2021 / 000230 and filing date March 26, 2021, and claims the priority of the international application. The entire contents of the international application are hereby introduced into the present application as a reference. Technical Field

[0003] The present disclosure relates to the field of communication systems, and more specifically, to a device and method for wireless communication, which can provide good communication performance and / or high reliability. Background Art

[0004] In the unlicensed band, the unlicensed spectrum is a shared spectrum. As long as the unlicensed spectrum meets the regulatory requirements set by the country or region for the spectrum, communication devices in different communication systems can use the unlicensed spectrum without applying for exclusive spectrum authorization from the government.

[0005] In order to allow various communication systems that use unlicensed spectrum for wireless communication to coexist in a friendly manner in the spectrum, some countries or regions have stipulated regulatory requirements that must be met when using unlicensed spectrum. For example, the communication device follows the Listen Before Talk (LBT) or channel access process, that is, the communication device needs to perform channel sensing before sending a signal on the channel. When the LBT result shows that the channel is idle, the communication device can transmit the signal, otherwise, the communication device cannot transmit the signal. In order to ensure fairness, once the communication device successfully occupies the channel, the transmission duration cannot exceed the maximum channel occupancy time (MCOT). The LBT mechanism is also called the channel access process. In the New Radio (NR) Release 16 (R16), there are different types of channel access processes, for example, the Type 1, Type 2A, Type 2B and Type 2C channel access processes described in TS 37.213.

[0006] For higher carrier frequencies above 52.6 GHz, omnidirectional transmission will be significantly limited in coverage due to severe channel loss. A straightforward solution is to use beamforming transmission so that the transmission energy can be more focused on the target, thereby improving the received signal-to-noise ratio (SNR). Similarly, for unlicensed bands above 52.6 GHz, such as the 60 GHz band, beamforming transmission will be used. On the other hand, the requirement still recommends the use of a channel access procedure (or listen-before-talk (LBT)). In this case, since the conventional channel access mechanism does not take the beamforming feature into account, the conventional channel access procedure is not suitable for higher frequencies.

[0007] Therefore, there is a need for an apparatus and method for a channel access mechanism at higher frequencies that takes into account beamforming technology. Summary of the invention

[0008] The purpose of the present disclosure is to propose a wireless communication device (such as user equipment (UE) and / or base station) and method, which can solve the problems in the prior art, provide a channel access mechanism at a higher frequency considering beamforming technology, provide good communication performance, and / or provide high reliability.

[0009] In a first aspect of the present disclosure, a wireless communication method is provided, which is performed by a user equipment (UE) and includes: performing a channel access process before sending an uplink transmission, wherein the channel access process is related to at least one of the following: an energy detection threshold (EDT) and a sensing beam.

[0010] In combination with the first aspect of the present application, in a first implementation of the first aspect, the sensing beam includes at least one of the following items: a reference signal with an index, a transmission configuration indicating a TCI status and quasi-co-sited QCL information, and / or the sensing beam is non-omnidirectional, and / or the direction of the sensing beam is related to the direction of the transmission beam.

[0011] In combination with the first aspect of the present application or the first implementation of the first aspect, in the second implementation of the first aspect, EDT depends on at least one of the following items: maximum configuration power; transmitter output power; operating channel bandwidth; and first information, wherein the value of the first information is a positive number in dBm.

[0012] In combination with the second implementation of the first aspect of the present application, in a third implementation of the first aspect, the value of the first information is between 0 and the first value.

[0013] In combination with the third implementation of the first aspect of the present application, in the fourth implementation of the first aspect, when the value of the first information is equal to the first value, the success probability of the channel access process for non-omnidirectional sensing is equal to the success probability of the channel access process for omnidirectional sensing.

[0014] In combination with the third implementation of the first aspect of the present application, in the fifth implementation of the first aspect, when the value of the first information is less than the first value, the success probability of the channel access process for non-omnidirectional sensing is greater than the success probability of the channel access process for omnidirectional sensing.

[0015] In combination with the third to fifth implementations of the first aspect of the present application, in a sixth implementation of the first aspect, the first value is predefined, the first value is configured by the base station, or the first value is reported by the UE to the base station.

[0016] In combination with the third to sixth implementations of the first aspect of the present application, in the seventh implementation of the first aspect, one or more candidate values ​​of the first value are predefined, one or more candidate values ​​of the first value are configured by the base station, or one or more candidate values ​​of the first value are reported to the base station by the UE.

[0017] In combination with the second to seventh implementations of the first aspect of the present application, in an eighth implementation of the first aspect, the value of the first information is predefined, or the value of the first information is configured in the system information.

[0018] In combination with the second to seventh implementations of the first aspect of the present application, in the ninth implementation of the first aspect, the value of the first information is configured by the base station in the system information and / or radio resource control RRC signaling and / or media access control MAC control element CE and / or downlink control information DCI.

[0019] In combination with the second to ninth implementations of the first aspect of the present application, in the tenth implementation of the first aspect, the value of the first information can be updated.

[0020] In combination with the second to tenth implementations of the first aspect of the present application, in the eleventh implementation of the first aspect, the adjustment of the value of the first information is indicated by the base station through RRC signaling and / or MAC-CE and / or DCI.

[0021] In combination with the eleventh implementation manner of the first aspect of the present application, in a twelfth implementation manner of the first aspect, the adjustment is in dB and the value of the adjustment includes a positive value and / or a negative value.

[0022] In combination with the eleventh implementation or the twelfth implementation of the first aspect of the present application, in the thirteenth implementation of the first aspect, the update value of the first information is equal to the current value of the first information plus the adjustment of the first information.

[0023] In combination with the eleventh to thirteenth implementations of the first aspect of the present application, in the fourteenth implementation of the first aspect, the adjustment of the first information is indicated by one or more predefined values.

[0024] In combination with the third to fourteenth implementations of the first aspect of the present application, in the fifteenth implementation of the first aspect, determination of the value of the first information is related to the first value.

[0025] In combination with the first aspect of the present application and the first to fifteenth implementations of the first aspect, in the sixteenth implementation of the first aspect, when the UE performs a channel access process, the UE applies a sensing beam.

[0026] In combination with the first aspect of the present application and the third to sixteenth implementations of the first aspect, in the seventeenth implementation of the first aspect, the channel access process includes sensing the channel using a sensing beam and comparing the sensed energy with an energy detection threshold EDT.

[0027] In combination with the seventeenth implementation of the first aspect of the present application, in the eighteenth implementation of the first aspect, when the sensed energy is greater than EDT, the channel is busy, and / or when the sensed energy is less than EDT, the channel is idle.

[0028] In combination with the seventeenth implementation or the eighteenth implementation of the first aspect of the present application, in the nineteenth implementation of the first aspect, the sensing beam includes a receiver beam, and the UE uses the receiver beam to sense the channel.

[0029] In combination with the nineteenth implementation manner of the first aspect of the present application, in the twentieth implementation manner of the first aspect, the receiver beam is related to the transmission beam.

[0030] In combination with the twentieth implementation of the first aspect of the present application, in the twenty-first implementation of the first aspect, the transmission beam includes TCI status and / or QCL information.

[0031] In combination with the twenty-first implementation manner of the first aspect of the present application, in the twenty-second implementation manner of the first aspect, the TCI status and / or QCL information is provided by the base station.

[0032] In combination with the twenty-first implementation or the twenty-second implementation of the first aspect of the present application, in the twenty-third implementation of the first aspect, the TCI state and / or QCL information is related to the first reference signal.

[0033] In combination with the twenty-third implementation manner of the first aspect of the present application, in a twenty-fourth implementation manner of the first aspect, the first reference signal includes a downlink reference signal and / or an uplink reference signal.

[0034] In combination with the twenty-fourth implementation of the first aspect of the present application, in a twenty-fifth implementation of the first aspect, the downlink reference signal includes an index.

[0035] In combination with the twenty-fourth implementation or the twenty-fifth implementation of the first aspect of the present application, in a twenty-sixth implementation of the first aspect, the uplink reference signal includes an index.

[0036] In combination with the twenty-fifth implementation or the twenty-sixth implementation of the first aspect of the present application, in the twenty-seventh implementation of the first aspect, the downlink reference signal with an index includes at least one of the following items: a synchronization signal block SSB index, an SSB candidate index, and a channel state information reference signal CSI-RS resource index.

[0037] In combination with the twenty-sixth implementation or the twenty-seventh implementation of the first aspect of the present application, in the twenty-eighth implementation of the first aspect, the uplink reference signal with an index includes at least a sounding reference signal SRS resource index.

[0038] In combination with the twenty-third implementation or the twenty-eighth implementation of the first aspect of the present application, in the twenty-ninth implementation of the first aspect, there is a corresponding relationship between the receiver beam and the first reference signal with an index.

[0039] In combination with the twenty-ninth implementation manner of the first aspect of the present application, in the thirtieth implementation manner of the first aspect, the UE is aware of the corresponding relationship and / or the UE notifies the base station of the corresponding relationship and / or the base station configures the corresponding relationship to the UE.

[0040] In combination with the 21st to 30th implementations of the first aspect of the present application, in the 31st implementation of the first aspect, the TCI status and / or QCL information is related to at least one of the following: uplink transmission, a control resource set CORESET, and a channel access process for uplink transmission.

[0041] In combination with the thirty-first implementation manner of the first aspect of the present application, in a thirty-second implementation manner of the first aspect, the CORESET includes a CORESET in which the UE detects the DCI for scheduling uplink transmission.

[0042] In combination with the thirty-first implementation or the thirty-second implementation of the first aspect of the present application, in a thirty-third implementation of the first aspect, the CORESET includes the last CORESET before the uplink transmission.

[0043] In combination with the nineteenth to thirty-third implementations of the first aspect of the present application, in the thirty-fourth implementation of the first aspect, the base station indicates to the UE the RS index with QCL type D corresponding to the receiver beam, and the UE uses the receiver beam to sense the channel.

[0044] In combination with the nineteenth to thirty-fourth implementations of the first aspect of the present application, in the thirty-fifth implementation of the first aspect, for uplink transmission performed by the UE, the UE receives QCL information for uplink transmission from the base station.

[0045] In combination with the thirty-fifth implementation of the first aspect of the present application, in a thirty-sixth implementation of the first aspect, the QCL information includes an RS index with a QCL type D.

[0046] In combination with the thirty-fifth implementation or the thirty-sixth implementation of the first aspect of the present application, in the thirty-seventh implementation of the first aspect, the uplink transmission includes a physical uplink shared channel PUSCH, a physical uplink control channel PUCCH, SRS or a physical random access channel PRACH.

[0047] In combination with the nineteenth to thirty-seventh implementations of the first aspect of the present application, in the thirty-eighth implementation of the first aspect, the UE uses a second receiver beam to sense the channel, wherein the second receiver beam corresponds to a second reference signal with an index.

[0048] In combination with the thirty-eighth implementation of the first aspect of the present application, in the thirty-ninth implementation of the first aspect, the second reference signal with the index has a QCL type D relationship with the first reference signal with the index.

[0049] In combination with the thirty-eighth implementation manner or the thirty-ninth implementation manner of the first aspect of the present application, in the fortieth implementation manner of the first aspect, the second reference signal with an index is configured by the base station to the UE.

[0050] In combination with the nineteenth to fortieth implementations of the first aspect of the present application, in the forty-first implementation of the first aspect, one or more other RSs having the same QCL type D as the RS are used to indicate the UE.

[0051] In combination with the forty-first implementation of the first aspect of the present application, in the forty-second implementation of the first aspect, the UE uses one or more receiver beams corresponding to one or more other RSs to sense the channel.

[0052] In combination with the forty-first implementation of the first aspect of the present application, in the forty-third implementation of the first aspect, the UE is configured to select a receiver beam to sense a channel corresponding to a first reference signal with an index or a second reference signal with an index.

[0053] In combination with the forty-third implementation of the first aspect of the present application, in the forty-fourth implementation of the first aspect, the selection is based on a predefined rule.

[0054] In combination with the forty-third implementation or the forty-fourth implementation of the first aspect of the present application, in the forty-fifth implementation of the first aspect, the selection is based on RS type.

[0055] In combination with the forty-third to forty-fifth implementations of the first aspect of the present application, in the forty-sixth implementation of the first aspect, the selection is based on the RS index value.

[0056] In combination with the forty-second to forty-sixth implementations of the first aspect of the present application, in the forty-seventh implementation of the first aspect, when there are multiple receiver beams available for sensing the channel, the UE selects a receiver beam to sense the channel in an RS index order.

[0057] In combination with the forty-second to forty-sixth implementations of the first aspect of the present application, in the forty-eighth implementation of the first aspect, the UE first selects the RS type for SSB, and then selects the RS type for CSI-RS, and / or the UE selects a receiver beam corresponding to an indicated SSB index, and then selects a receiver beam corresponding to an indicated CSI-RS resource index.

[0058] In combination with the thirty-sixth to forty-eighth implementations of the first aspect of the present application, in the forty-ninth implementation of the first aspect, the UE is configured to receive DCI for scheduling uplink transmission.

[0059] In combination with the forty-ninth implementation of the first aspect of the present application, in the fiftieth implementation of the first aspect, the DCI indicates QCL information, and the QCL information is used to determine a receiver beam used to sense the channel before uplink transmission.

[0060] In combination with the forty-ninth implementation or the fiftieth implementation of the first aspect of the present application, in the fifty-first implementation of the first aspect, the DCI includes DCI format 1_1, DCI format 0_1, DCI format 1_2 and / or DCI format 0_2.

[0061] In combination with the forty-ninth to fifty-first implementations of the first aspect of the present application, in the fifty-second implementation of the first aspect, the DCI includes an indication field for indicating QCL information.

[0062] In combination with the fifty-second implementation of the first aspect of the present application, in the fifty-third implementation of the first aspect, the QCL information indicates the RS index in the RS index set, and the RS index set is configured through RRC signaling and / or MAC-CE.

[0063] In combination with the forty-ninth to fifty-third implementations of the first aspect of the present application, in the fifty-fourth implementation of the first aspect, the DCI schedules the first uplink transmission and the second uplink transmission.

[0064] In combination with the fifty-first implementation of the first aspect of the present application, in the fifty-fifth implementation of the first aspect, the indication field in the DCI indicates QCL information used for the first uplink transmission and / or the second uplink transmission.

[0065] In combination with the fifty-first implementation of the first aspect of the present application, in the fifty-sixth implementation of the first aspect, the QCL information used for the second uplink transmission is predefined.

[0066] In combination with the fifty-first implementation of the first aspect of the present application, in the fifty-seventh implementation of the first aspect, the predefined QCL information includes at least one of the following items: following the QCL information used for the first uplink transmission and following the predefined or preconfigured QCL information.

[0067] In combination with the fifty-first implementation of the first aspect of the present application, in the fifty-eighth implementation of the first aspect, the QCL information for the second uplink transmission is obtained from the QCL information of the downlink transmission, and the downlink transmission and the second uplink transmission are in the same channel occupancy.

[0068] In combination with the fifty-eighth implementation manner of the first aspect of the present application, in the fifty-ninth implementation manner of the first aspect, the channel occupancy rate includes the channel occupancy rate of the base station.

[0069] In combination with the fifty-fourth implementation of the first aspect of the present application, in the sixtieth implementation of the first aspect, the DCI indicates first QCL information and second QCL information, the first QCL information is used for the first uplink transmission, and the second QCL information is used for the second uplink transmission.

[0070] In combination with the fifty-fourth implementation of the first aspect of the present application, in the sixty-first implementation of the first aspect, the existing indication field in the DCI indicates the QCL information used for the first uplink transmission and / or the second uplink transmission.

[0071] In combination with the sixty-first implementation of the first aspect of the present application, in the sixty-second implementation of the first aspect, the existing indication field in the DCI includes an SRS resource indication of DCI format 0_1, and / or a transmission configuration indication of DCI format 1_1, and / or a PUCCH resource indication of DCI format 1_0 and / or DCI format 1_1.

[0072] In combination with the fifty-fourth implementation of the first aspect of the present application, in the sixty-third implementation of the first aspect, the dedicated indication field in the DCI indicates the QCL information used for the first uplink transmission and / or the second uplink transmission.

[0073] In combination with the forty-ninth to sixty-third implementations of the first aspect of the present application, in the sixty-fourth implementation of the first aspect, for uplink transmissions scheduled by DCI format 0_0 and / or DCI format 1_0, QCL information is preconfigured and / or predefined.

[0074] In combination with the thirty-fifth to sixty-fourth implementations of the first aspect of the present application, in the sixty-fifth implementation of the first aspect, for the pre-configured QCL information, the pre-configured QCL information is determined based on the QCL information configured for the control resource set CORESET in which the UE detects the scheduling DCI.

[0075] In combination with the sixty-fifth implementation of the first aspect of the present application, in the sixty-sixth implementation of the first aspect, the scheduling DCI schedules uplink transmission, and / or the CORESET is the last CORESET before the UE sends uplink transmission.

[0076] In combination with the sixty-sixth implementation of the first aspect of the present application, in the sixty-seventh implementation of the first aspect, the distance between the CORESET and the uplink transmission includes a time interval.

[0077] In combination with the sixty-seventh implementation of the first aspect of the present application, in the sixty-eighth implementation of the first aspect, the time interval is predefined or preconfigured.

[0078] In combination with the sixty-seventh implementation or the sixty-eighth implementation of the first aspect of the present application, in the sixty-ninth implementation of the first aspect, with or without considering the time advance, the distance between the CORESET and the uplink transmission is defined as the duration after the last symbol of the CORESET and before the first symbol of the uplink transmission.

[0079] In combination with the sixty-fifth implementation of the first aspect of the present application, in the seventieth implementation of the first aspect, the scheduling DCI is the last scheduling DCI before the UE sends an uplink transmission.

[0080] In combination with the seventieth implementation manner of the first aspect of the present application, in the seventy-first implementation manner of the first aspect, the distance between the scheduled DCI and the uplink transmission includes a time interval.

[0081] In combination with the seventy-first implementation of the first aspect of the present application, in the seventy-second implementation of the first aspect, the time interval is predefined or preconfigured.

[0082] In combination with the seventy-first implementation or the seventy-second implementation of the first aspect of the present application, in the seventy-third implementation of the first aspect, with or without considering the time advance, the distance between the scheduled DCI and the uplink transmission is defined as the duration after the last symbol of the scheduled DCI and before the first symbol of the uplink transmission.

[0083] In combination with the thirty-fifth to seventy-third implementations of the first aspect of the present application, in the seventy-fourth implementation of the first aspect, the UE is configured by the base station whether to provide QCL information for the channel access process for uplink transmission in the DCI for scheduling uplink transmission.

[0084] In combination with the seventy-fourth implementation manner of the first aspect of the present application, in the seventy-fifth implementation manner of the first aspect, the base station notifies the UE whether QCL information has been provided through RRC parameters.

[0085] In combination with the seventy-fifth implementation of the first aspect of the present application, in the seventy-sixth implementation of the first aspect, when the base station notifies the UE that QCL information is not provided in the DCI, the UE determines the QCL information of the channel used to sense the uplink transmission according to predefined rules.

[0086] In combination with the seventy-sixth implementation of the first aspect of the present application, in the seventy-seventh implementation of the first aspect, the predefined rules include preconfigured QCL information and / or QCL information configured for CORESET and / or QCL information for downlink transmission.

[0087] In combination with the thirty-fifth to seventy-seventh implementations of the first aspect of the present application, in the seventy-eighth implementation of the first aspect, when the uplink transmission is PUCCH transmission, QCL information of the channel for sensing PUCCH transmission is configured in the RRC signaling.

[0088] In combination with the seventy-eighth implementation manner of the first aspect of the present application, in the seventy-ninth implementation manner of the first aspect, the RRC signaling includes a PUCCH configuration information element IE.

[0089] In combination with the thirty-fifth to seventy-seventh implementations of the first aspect of the present application, in the eightieth implementation of the first aspect, when the uplink transmission is SRS transmission, QCL information of the channel for directional sensing SRS transmission is configured in the RRC signaling.

[0090] In combination with the 80th implementation manner of the first aspect of the present application, in the 81st implementation manner of the first aspect, the RRC signaling includes an SRS configuration IE.

[0091] In a second aspect of the present disclosure, a wireless communication method is provided, which is performed by a base station and includes: controlling a user equipment (UE) to perform a channel access process before sending an uplink transmission, wherein the channel access process is related to at least one of the following: an energy detection threshold (EDT) and a sensing beam.

[0092] In combination with the second aspect of the present application, in a first implementation of the second aspect, the sensing beam includes at least one of the following items: a reference signal with an index, a transmission configuration indicating a TCI status and quasi-co-sited QCL information, and / or the sensing beam is non-omnidirectional, and / or the direction of the sensing beam is related to the direction of the transmission beam.

[0093] In combination with the second aspect of the present application or the first implementation of the second aspect, in the second implementation of the second aspect, EDT depends on at least one of the following: maximum configuration power; transmitter output power; operating channel bandwidth; and first information, wherein the value of the first information is a positive number in dBm.

[0094] In combination with the second implementation of the second aspect of the present application, in a third implementation of the second aspect, the value of the first information is between 0 and the first value.

[0095] In combination with the third implementation of the second aspect of the present application, in the fourth implementation of the second aspect, when the value of the first information is equal to the first value, the success probability of the channel access process for non-omnidirectional sensing is equal to the success probability of the channel access process for omnidirectional sensing.

[0096] In combination with the third implementation of the second aspect of the present application, in the fifth implementation of the second aspect, when the value of the first information is less than the first value, the success probability of the channel access process for non-omnidirectional sensing is greater than the success probability of the channel access process for omnidirectional sensing.

[0097] In combination with the third to fifth implementations of the second aspect of the present application, in a sixth implementation of the second aspect, the first value is predefined, the first value is configured by the base station, or the first value is reported by the UE to the base station.

[0098] In combination with the third to sixth implementations of the second aspect of the present application, in the seventh implementation of the second aspect, one or more candidate values ​​of the first value are predefined, one or more candidate values ​​of the first value are configured by the base station, or one or more candidate values ​​of the first value are reported to the base station by the UE.

[0099] In combination with the second to seventh implementations of the second aspect of the present application, in an eighth implementation of the second aspect, the value of the first information is predefined, or the value of the first information is configured in the system information.

[0100] In combination with the second to seventh implementations of the second aspect of the present application, in the ninth implementation of the second aspect, the value of the first information is configured by the base station in the system information and / or radio resource control RRC signaling and / or media access control MAC control element CE and / or downlink control information DCI.

[0101] In combination with the second to ninth implementations of the second aspect of the present application, in the tenth implementation of the second aspect, the value of the first information can be updated.

[0102] In combination with the second to tenth implementations of the second aspect of the present application, in the eleventh implementation of the second aspect, the adjustment of the value of the first information is indicated by the base station through RRC signaling and / or MAC-CE and / or DCI.

[0103] In combination with the eleventh implementation manner of the second aspect of the present application, in a twelfth implementation manner of the second aspect, the adjustment is in dB and the value of the adjustment includes positive and negative values.

[0104] In combination with the eleventh implementation or the twelfth implementation of the second aspect of the present application, in the thirteenth implementation of the second aspect, the updated value of the first information is equal to the current value of the first information plus the adjustment of the first information.

[0105] In combination with the eleventh to thirteenth implementations of the second aspect of the present application, in the fourteenth implementation of the second aspect, the adjustment of the first information is indicated by one or more predefined values.

[0106] In combination with the third to fourteenth implementations of the second aspect of the present application, in the fifteenth implementation of the second aspect, determination of the value of the first information is related to the first value.

[0107] In combination with the second aspect of the present application and the first to fifteenth implementations of the second aspect, in the sixteenth implementation of the second aspect, when the UE performs a channel access process, the base station controls the UE to apply a sensing beam.

[0108] In combination with the second aspect of the present application and the third to sixteenth implementations of the second aspect, in the seventeenth implementation of the second aspect, the channel access process includes sensing the channel using a sensing beam and comparing the sensed energy with an energy detection threshold EDT.

[0109] In combination with the seventeenth implementation of the second aspect of the present application, in the eighteenth implementation of the second aspect, when the sensed energy is greater than EDT, the channel is busy, and / or when the sensed energy is less than EDT, the channel is idle.

[0110] In combination with the seventeenth implementation or the eighteenth implementation of the second aspect of the present application, in the nineteenth implementation of the second aspect, the sensing beam includes a receiver beam, and the base station controls the UE to use the receiver beam to sense the channel.

[0111] In combination with the nineteenth implementation manner of the second aspect of the present application, in the twentieth implementation manner of the second aspect, the receiver beam is related to the transmission beam.

[0112] In combination with the twentieth implementation of the second aspect of the present application, in the twenty-first implementation of the second aspect, the transmission beam includes TCI status and / or QCL information.

[0113] In combination with the twenty-first implementation manner of the second aspect of the present application, in the twenty-second implementation manner of the second aspect, the TCI status and / or QCL information is provided by the base station.

[0114] In combination with the twenty-first implementation or the twenty-second implementation of the second aspect of the present application, in the twenty-third implementation of the second aspect, the TCI state and / or QCL information is related to the first reference signal.

[0115] In combination with the twenty-third implementation manner of the second aspect of the present application, in a twenty-fourth implementation manner of the second aspect, the first reference signal includes a downlink reference signal and / or an uplink reference signal.

[0116] In combination with the twenty-fourth implementation of the second aspect of the present application, in a twenty-fifth implementation of the second aspect, the downlink reference signal includes an index.

[0117] In combination with the twenty-fourth implementation or the twenty-fifth implementation of the second aspect of the present application, in a twenty-sixth implementation of the second aspect, the uplink reference signal includes an index.

[0118] In combination with the twenty-fifth implementation or the twenty-sixth implementation of the second aspect of the present application, in the twenty-seventh implementation of the second aspect, the downlink reference signal with an index includes at least one of the following items: a synchronization signal block SSB index, an SSB candidate index, and a channel state information reference signal CSI-RS resource index.

[0119] In combination with the twenty-sixth implementation or the twenty-seventh implementation of the second aspect of the present application, in the twenty-eighth implementation of the second aspect, the uplink reference signal with an index includes at least a sounding reference signal SRS resource index.

[0120] In combination with the twenty-third implementation or the twenty-eighth implementation of the second aspect of the present application, in the twenty-ninth implementation of the second aspect, there is a corresponding relationship between the receiver beam and the first reference signal with an index.

[0121] In combination with the twenty-ninth implementation manner of the second aspect of the present application, in the thirtieth implementation manner of the second aspect, the UE is aware of the corresponding relationship and / or the UE notifies the base station of the corresponding relationship and / or the base station configures the corresponding relationship to the UE.

[0122] In combination with the 21st to 30th implementations of the second aspect of the present application, in the 31st implementation of the second aspect, the TCI status and / or QCL information is related to at least one of the following: uplink transmission, control resource set CORESET, and channel access process for uplink transmission.

[0123] In combination with the thirty-first implementation manner of the second aspect of the present application, in the thirty-second implementation manner of the second aspect, the CORESET includes a CORESET in which the UE detects the DCI for scheduling uplink transmission.

[0124] In combination with the thirty-first implementation or the thirty-second implementation of the second aspect of the present application, in a thirty-third implementation of the second aspect, the CORESET includes the last CORESET before the uplink transmission.

[0125] In combination with the nineteenth to thirty-third implementations of the second aspect of the present application, in the thirty-fourth implementation of the second aspect, the base station indicates to the UE the RS index with QCL type D corresponding to the receiver beam, and the base station controls the UE to use the receiver beam to sense the channel.

[0126] In combination with the nineteenth to thirty-fourth implementations of the second aspect of the present application, in the thirty-fifth implementation of the second aspect, for uplink transmission performed by the UE, the UE receives QCL information for uplink transmission from the base station.

[0127] In combination with the thirty-fifth implementation of the second aspect of the present application, in the thirty-sixth implementation of the second aspect, the QCL information includes an RS index with QCL type D.

[0128] In combination with the thirty-fifth implementation or the thirty-sixth implementation of the second aspect of the present application, in the thirty-seventh implementation of the second aspect, the uplink transmission includes a physical uplink shared channel PUSCH, a physical uplink control channel PUCCH, SRS or a physical random access channel PRACH.

[0129] In combination with the nineteenth to thirty-seventh implementations of the second aspect of the present application, in the thirty-eighth implementation of the second aspect, the base station controls the UE to use a second receiver beam to sense the channel, wherein the second receiver beam corresponds to a second reference signal with an index.

[0130] In combination with the thirty-eighth implementation of the second aspect of the present application, in the thirty-ninth implementation of the second aspect, the second reference signal with the index has a QCL type D relationship with the first reference signal with the index.

[0131] In combination with the thirty-eighth implementation or the thirty-ninth implementation of the second aspect of the present application, in the fortieth implementation of the second aspect, the second reference signal with an index is configured by the base station to the UE.

[0132] In combination with the nineteenth to fortieth implementations of the second aspect of the present application, in the forty-first implementation of the second aspect, one or more other RSs having the same QCL type D as the RS are used to indicate the UE.

[0133] In combination with the forty-first implementation of the second aspect of the present application, in the forty-second implementation of the second aspect, the base station controls the UE to use one or more receiver beams corresponding to one or more other RSs to sense the channel.

[0134] In combination with the forty-first implementation of the second aspect of the present application, in the forty-third implementation of the second aspect, the base station controls the UE to select a receiver beam to sense a channel corresponding to a first reference signal with an index or a second reference signal with an index.

[0135] In combination with the forty-third implementation of the second aspect of the present application, in the forty-fourth implementation of the second aspect, the selection is based on a predefined rule.

[0136] In combination with the forty-third implementation or the forty-fourth implementation of the second aspect of the present application, in the forty-fifth implementation of the second aspect, the RS type is selected.

[0137] In combination with the forty-third to forty-fifth implementations of the second aspect of the present application, in the forty-sixth implementation of the second aspect, the selection is based on the RS index value.

[0138] In combination with the 42nd to 46th implementations of the second aspect of the present application, in the 47th implementation of the second aspect, when there are multiple receiver beams available for sensing the channel, the base station controls the UE to select a receiver beam in RS index order to sense the channel.

[0139] In combination with the 42nd to 46th implementations of the second aspect of the present application, in the 48th implementation of the second aspect, the base station controls the UE to select a receiver beam corresponding to the indicated SSB index, and then selects a receiver beam corresponding to the indicated CSI-RS resource index.

[0140] In combination with the thirty-sixth to forty-eighth implementations of the second aspect of the present application, in the forty-ninth implementation of the second aspect, the base station controls the UE to receive the DCI for scheduling uplink transmission.

[0141] In combination with the forty-ninth implementation of the second aspect of the present application, in the fiftieth implementation of the second aspect, the DCI indicates QCL information, and the QCL information is used to determine a receiver beam used to sense the channel before uplink transmission.

[0142] In combination with the forty-ninth implementation or the fiftieth implementation of the second aspect of the present application, in the fifty-first implementation of the second aspect, the DCI includes DCI format 1_1, DCI format 0_1, DCI format 1_2 and / or DCI format 0_2.

[0143] In combination with the forty-ninth to fifty-first implementations of the second aspect of the present application, in the fifty-second implementation of the second aspect, the DCI includes an indication field for indicating QCL information.

[0144] In combination with the fifty-second implementation of the second aspect of the present application, in the fifty-third implementation of the second aspect, the QCL information indicates the RS index in the RS index set, and the RS index set is configured through RRC signaling and / or MAC-CE.

[0145] In combination with the forty-ninth to fifty-third implementations of the second aspect of the present application, in the fifty-fourth implementation of the second aspect, the DCI schedules the first uplink transmission and the second uplink transmission.

[0146] In combination with the fifty-first implementation of the second aspect of the present application, in the fifty-fifth implementation of the second aspect, the indication field in the DCI indicates the QCL information used for the first uplink transmission and / or the second uplink transmission.

[0147] In combination with the fifty-first implementation of the second aspect of the present application, in the fifty-sixth implementation of the second aspect, the QCL information used for the second uplink transmission is predefined.

[0148] In combination with the fifty-first implementation of the second aspect of the present application, in the fifty-seventh implementation of the second aspect, the predefined QCL information includes at least one of the following items: following the QCL information used for the first uplink transmission and following the predefined or preconfigured QCL information.

[0149] In combination with the fifty-first implementation of the second aspect of the present application, in the fifty-eighth implementation of the second aspect, the QCL information for the second uplink transmission is obtained from the QCL information of the downlink transmission, and the downlink transmission and the second uplink transmission are in the same channel occupancy.

[0150] In combination with the fifty-eighth implementation of the second aspect of the present application, in the fifty-ninth implementation of the second aspect, the channel occupancy rate includes the channel occupancy rate of the base station.

[0151] In combination with the fifty-fourth implementation of the second aspect of the present application, in the sixtieth implementation of the second aspect, the DCI indicates first QCL information and second QCL information, the first QCL information is used for the first uplink transmission, and the second QCL information is used for the second uplink transmission.

[0152] In combination with the fifty-fourth implementation of the second aspect of the present application, in the sixty-first implementation of the second aspect, the existing indication field in the DCI indicates the QCL information used for the first uplink transmission and / or the second uplink transmission.

[0153] In combination with the sixty-first implementation manner of the second aspect of the present application, in the sixty-second implementation manner of the second aspect, the existing indication field in the DCI includes an SRS resource indication of DCI format 0_1, and / or a transmission configuration indication of DCI format 1_1, and / or a PUCCH resource indication of DCI format 1_0 and / or DCI format 1_1.

[0154] In combination with the fifty-fourth implementation of the second aspect of the present application, in the sixty-third implementation of the second aspect, the dedicated indication field in the DCI indicates the QCL information used for the first uplink transmission and / or the second uplink transmission.

[0155] In combination with the forty-ninth to sixty-third implementations of the second aspect of the present application, in the sixty-fourth implementation of the second aspect, for uplink transmissions scheduled by DCI format 0_0 and / or DCI format 1_0, QCL information is preconfigured and / or predefined.

[0156] In combination with the thirty-fifth to sixty-fourth implementations of the second aspect of the present application, in the sixty-fifth implementation of the second aspect, for the pre-configured QCL information, the pre-configured QCL information is determined based on the QCL information configured for the control resource set CORESET in which the UE detects the scheduling DCI.

[0157] In combination with the sixty-fifth implementation of the second aspect of the present application, in the sixty-sixth implementation of the second aspect, the scheduling DCI schedules uplink transmission, and / or the CORESET is the last CORESET before the UE sends uplink transmission.

[0158] In combination with the sixty-sixth implementation of the second aspect of the present application, in the sixty-seventh implementation of the second aspect, the distance between the CORESET and the uplink transmission includes a time interval.

[0159] In combination with the sixty-seventh implementation of the second aspect of the present application, in the sixty-eighth implementation of the second aspect, the time interval is predefined or preconfigured.

[0160] In combination with the sixty-seventh implementation or the sixty-eighth implementation of the second aspect of the present application, in the sixty-ninth implementation of the second aspect, with or without considering the time advance, the distance between CORESET and the uplink transmission is defined as the duration after the last symbol of CORESET and before the first symbol of the uplink transmission.

[0161] In combination with the sixty-fifth implementation of the second aspect of the present application, in the seventieth implementation of the second aspect, the scheduling DCI is the last scheduling DCI before the UE sends an uplink transmission.

[0162] In combination with the seventieth implementation manner of the second aspect of the present application, in the seventy-first implementation manner of the second aspect, the distance between the scheduled DCI and the uplink transmission includes a time interval.

[0163] In combination with the seventy-first implementation of the second aspect of the present application, in the seventy-second implementation of the second aspect, the time interval is predefined or preconfigured.

[0164] In combination with the seventy-first implementation or the seventy-second implementation of the second aspect of the present application, in the seventy-third implementation of the second aspect, with or without considering the time advance, the distance between the scheduled DCI and the uplink transmission is defined as the duration after the last symbol of the scheduled DCI and before the first symbol of the uplink transmission.

[0165] In combination with the thirty-fifth to seventy-third implementations of the second aspect of the present application, in the seventy-fourth implementation of the second aspect, the UE is configured by the base station whether to provide QCL information for the channel access process for uplink transmission in the DCI for scheduling uplink transmission.

[0166] In combination with the seventy-fourth implementation manner of the second aspect of the present application, in the seventy-fifth implementation manner of the second aspect, the base station notifies the UE whether QCL information has been provided through RRC parameters.

[0167] In combination with the seventy-fifth implementation of the second aspect of the present application, in the seventy-sixth implementation of the second aspect, when the base station notifies the UE that QCL information is not provided in the DCI, the base station controls the UE to determine the QCL information of the channel used to sense uplink transmission according to predefined rules.

[0168] In combination with the seventy-sixth implementation of the second aspect of the present application, in the seventy-seventh implementation of the second aspect, the predefined rules include preconfigured QCL information and / or QCL information configured for CORESET and / or QCL information for downlink transmission.

[0169] In combination with the thirty-fifth to seventy-seventh implementations of the second aspect of the present application, in the seventy-eighth implementation of the second aspect, when the uplink transmission is PUCCH transmission, QCL information of the channel for sensing PUCCH transmission is configured in the RRC signaling.

[0170] In combination with the seventy-eighth implementation manner of the second aspect of the present application, in the seventy-ninth implementation manner of the second aspect, the RRC signaling includes a PUCCH configuration information element IE.

[0171] In combination with the thirty-fifth to seventy-seventh implementations of the second aspect of the present application, in the eightieth implementation of the second aspect, when the uplink transmission is SRS transmission, QCL information of the channel for directional sensing SRS transmission is configured in the RRC signaling.

[0172] In combination with the 80th implementation manner of the second aspect of the present application, in the 81st implementation manner of the second aspect, the RRC signaling includes an SRS configuration IE.

[0173] In a third aspect of the present disclosure, a user equipment is provided, comprising: a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to perform a channel access procedure before sending an uplink transmission, wherein the channel access procedure is related to an energy detection threshold (EDT) and a sensing beam. Specifically, the user equipment is used to perform the method in the first aspect above.

[0174] In a fourth aspect of the present disclosure, a base station is provided, comprising: a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to control a user equipment (UE) to perform a channel access procedure before sending an uplink transmission, wherein the channel access procedure is related to an energy detection threshold (EDT) and a sensing beam. Specifically, the base station is used to perform the method in the second aspect above.

[0175] In a fifth aspect of the present disclosure, a non-transitory machine-readable storage medium is provided, on which instructions are stored. When the instructions are executed by a computer, the computer executes the methods in the first and second aspects above.

[0176] In a sixth aspect of the present disclosure, a chip is provided, comprising a processor, wherein the processor is configured to call and run a computer program stored in a memory, so that a device equipped with the chip executes the methods in the first and second aspects above.

[0177] In a seventh aspect of the present disclosure, a computer-readable storage medium is provided, in which a computer program is stored, so that a computer executes the methods in the first and second aspects described above.

[0178] In an eighth aspect of the present disclosure, a computer program product is provided, which includes a computer program. The computer program enables a computer to execute the methods in the first and second aspects above.

[0179] In a ninth aspect of the present disclosure, a computer program is provided, which enables a computer to execute the methods in the first and second aspects above. BRIEF DESCRIPTION OF THE DRAWINGS

[0180] In order to more clearly illustrate the embodiments of the present disclosure or related technologies, the following drawings to be described in the embodiments are briefly introduced. Obviously, these drawings are only some embodiments of the present disclosure, and ordinary technicians in this field can obtain other drawings based on these drawings without paying any prerequisites.

[0181] Figure 1 It is a block diagram of one or more user equipment (UE) and a communication base station (e.g., gNB) communicating in a communication network system according to an embodiment of the present disclosure.

[0182] Figure 2 A flowchart of a method for wireless communication by a user equipment (UE) according to an embodiment of the present disclosure is shown.

[0183] Figure 3 A flow chart of a method for performing wireless communication by a base station according to an embodiment of the present disclosure is shown.

[0184] Figure 4 A schematic diagram of a channel access mechanism according to an embodiment of the present disclosure is shown.

[0185] Figure 5 A schematic diagram showing mapping between a transmitter beam from a base station and a receiver beam from a UE according to an embodiment of the present disclosure is shown.

[0186] Figure 6 A schematic diagram is shown in which a UE according to an embodiment of the present disclosure can use a receiver beam corresponding to other downlink (DL) reference signals (RS) for directional sensing.

[0187] Figure 7 A block diagram of a system for wireless communication according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0188] The technical points, structural features, implementation objectives and effects of the embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings. Specifically, the terms in the embodiments of the present disclosure are only used to describe a certain embodiment and are not used to limit the present disclosure.

[0189] For uplink transmissions in a shared spectrum, a user equipment (UE) may perform a channel access procedure before transmitting one or more uplink transmissions in a channel. The channel access procedure includes a type 1 channel access according to Section 4.2.1.1 of TS37.213, or a type 2A channel access according to Section 4.2.1.2.1 of TS37.213, or a type 2B channel access according to Section 4.2.1.2.2 of TS37.213, or a type 2C channel access according to Section 4.2.1.2.3 of TS37.213.

[0190] Figure 1 It is shown that in some embodiments, one or more user equipments (UEs) 10 and base stations (e.g., gNBs) 20 for transmission adjustment in a communication network system 30 according to an embodiment of the present disclosure are provided. The communication network system 30 includes one or more UEs 10 and base stations 20. The one or more UEs 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13. The base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23. The processor 11 or 21 may be configured to implement the proposed functions, processes, and / or methods described in this specification. The radio interface protocol layer may be implemented in the processor 11 or 21. The memory 12 or 22 is operably coupled to the processor 11 or 21 and stores various information for operating the processor 11 or 21. The transceiver 13 or 23 is operably coupled to the processor 11 or 21, and the transceiver 13 or 23 sends and / or receives radio signals.

[0191] The processor 11 or 21 may include an application-specific integrated circuit (ASIC), other chipsets, logic circuits and / or data processing devices. The memory 12 or 22 may include a read-only memory (ROM), a random access memory (RAM), a flash memory, a memory card, a storage medium and / or other storage devices. The transceiver 13 or 23 may include a baseband circuit for processing radio frequency signals. When these embodiments are implemented in software, the techniques described in this application may be implemented by modules (e.g., processes, functions, etc.) that perform the functions described in this application. These modules may be stored in the memory 12 or 22 and executed by the processor 11 or 21. The memory 12 or 22 may be implemented within the processor 11 or 21, or implemented outside the processor 11 or 21, in which case the memory 12 or 22 may be communicatively coupled to the processor 11 or 21 in various ways known in the art.

[0192] In some embodiments, the processor 11 is configured to perform a channel access procedure before sending an uplink transmission, wherein the channel access procedure is related to at least one of the following: an energy detection threshold (EDT) and a sensing beam. This can solve the problems in the prior art, provide a channel access mechanism at a higher frequency considering beamforming technology, provide good communication performance and / or provide high reliability.

[0193] In some embodiments, the processor 21 is configured to control the UE 10 to perform a channel access procedure before sending an uplink transmission, wherein the channel access procedure is related to at least one of the following: an energy detection threshold (EDT) and a sensing beam. This can solve the problems in the prior art, provide a channel access mechanism at a higher frequency considering beamforming technology, provide good communication performance, and / or provide high reliability.

[0194] Figure 2 A method 200 for performing wireless communication by a user equipment (UE) according to an embodiment of the present disclosure is shown. In some embodiments, the method 200 includes: block 202, performing a channel access procedure before sending an uplink transmission, wherein the channel access procedure is related to at least one of the following: an energy detection threshold (EDT) and a sensing beam. This can solve the problems in the prior art, provide a channel access mechanism at a higher frequency considering beamforming technology, provide good communication performance and / or provide high reliability.

[0195] Figure 3 A method 300 for performing wireless communication by a base station according to an embodiment of the present disclosure is shown. In some embodiments, the method 300 includes: block 302, controlling a user equipment (UE) to perform a channel access process before sending an uplink transmission, wherein the channel access process is related to at least one of the following: an energy detection threshold (EDT) and a sensing beam. This can solve the problems in the prior art, provide a channel access mechanism at a higher frequency considering beamforming technology, provide good communication performance and / or provide high reliability.

[0196] In some embodiments, the sensing beam is non-omnidirectional, and / or the direction of the sensing beam is related to the direction of the transmission beam. In some embodiments, the sensing beam is related to at least one of the following: a Transmission Configuration Indicator (TCI) state, Quasi Co-Located (QCL) information, and a reference signal with an index. In some embodiments, the EDT depends on at least one of the following: a maximum configured power, a transmitter output power, an operating channel bandwidth, and a first information, wherein the value of the first information is a positive number in dBm. In some embodiments, the value of the first information is between 0 and the first value. In some embodiments, when the value of the first information is equal to the first value, the probability of success of the channel access process for non-omnidirectional sensing is equal to the probability of success of the channel access process for omnidirectional sensing. In some embodiments, when the value of the first information is less than the first value, the probability of success of the channel access process for non-omnidirectional sensing is greater than the probability of success of the channel access process for omnidirectional sensing. In some embodiments, the first value is predefined, the first value is configured by the base station, or the first value is reported to the base station by the UE. In some embodiments, one or more candidate values ​​of the first value are predefined, one or more candidate values ​​of the first value are configured by the base station, or one or more candidate values ​​of the first value are reported to the base station by the UE. In some embodiments, the value of the first information is predefined, or the value of the first information is configured in the system information. In some embodiments, the base station configures the value of the first information in the system information and / or the Radio Resource Control (RRC) signaling and / or the Medium Access Control (MAC) control element (CE) and / or the downlink control information (DCI).

[0197] In some embodiments, the value of the first information can be updated. In some embodiments, the adjustment of the value of the first information is indicated by the base station through RRC signaling and / or MAC-CE and / or DCI. In some embodiments, the adjustment is in dB and the adjusted value includes positive and negative values. In some embodiments, the updated value of the first information is equal to the current value of the first information plus the adjustment of the first information. In some embodiments, the adjustment of the first information is indicated by one or more predefined values. In some embodiments, the determination of the value of the first information is related to the first value. In some embodiments, when the UE performs a channel access process, the UE applies a sensing beam. In some embodiments, the channel access process includes sensing a channel using a sensing beam and comparing the sensed energy with an energy detection threshold (EDT). In some embodiments, when the sensed energy is greater than the EDT, the channel is busy, and / or when the sensed energy is less than the EDT, the channel is idle. In some embodiments, the sensing beam includes a receiver beam, and the UE uses the receiver beam to sense the channel. In some embodiments, the receiver beam is associated with the transmission beam.

[0198] In some embodiments, the transmission beam includes TCI state and / or QCL information. In some embodiments, the TCI state and / or QCL information is provided by the base station. In some embodiments, the TCI state and / or QCL information is related to the first reference signal. In some embodiments, the first reference signal includes a downlink reference signal and / or an uplink reference signal. In some embodiments, the downlink reference signal includes an index. In some embodiments, the uplink reference signal includes an index. In some embodiments, the downlink reference signal with an index includes at least one of the following: a synchronization signal block (Synchronization SignalBlock, SSB) index, an SSB candidate index, and a channel state information reference signal (Channel State Information-Reference Signal, CSI-RS) resource index. In some embodiments, the uplink reference signal with an index includes at least a sounding reference signal (Sounding Reference Signal, SRS) resource index. In some embodiments, there is a corresponding relationship between the receiver beam and the first reference signal with the index. In some embodiments, the UE is aware of the corresponding relationship and / or the UE notifies the base station of the corresponding relationship and / or the base station configures the corresponding relationship to the UE. In some embodiments, the TCI state and / or QCL information is related to at least one of: uplink transmission, a control resource set (CORESET), and a channel access procedure for uplink transmission.

[0199] In some embodiments, the CORESET includes a CORESET in which the UE detects a DCI scheduling an uplink transmission. In some embodiments, the CORESET includes a last CORESET before the uplink transmission. In some embodiments, the base station indicates to the UE an RS index with QCL type D corresponding to the receiver beam, and the UE uses the receiver beam to sense a channel. In some embodiments, for an uplink transmission performed by the UE, the UE receives QCL information for the uplink transmission from the base station. In some embodiments, the QCL information includes an RS index with QCL type D. In some embodiments, the uplink transmission includes a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH), a physical uplink control channel (Physical Uplink Control Channel, PUCCH), an SRS, or a physical random access channel (Physical Random Access Channel, PRACH). In some embodiments, the UE senses the channel using a second receiver beam, wherein the second receiver beam corresponds to a second reference signal with an index. In some embodiments, the second reference signal with an index has a QCL type D relationship with the first reference signal with an index. In some embodiments, the second reference signal with an index is configured to the UE by the base station. In some embodiments, another one or more RSs having the same QCL type D as the RS are used to indicate the UE.

[0200] In some embodiments, the UE senses a channel using one or more receiver beams corresponding to another one or more RSs. In some embodiments, the UE is configured to select a receiver beam to sense a channel corresponding to a first reference signal with an index or a second reference signal with an index. In some embodiments, the selection is based on a predefined rule. In some embodiments, the selection is based on an RS type. In some examples, the UE first selects an RS type that is an SSB and then selects an RS type that is a CSI-RS. In some embodiments, the selection is based on an RS index value. In some embodiments, when there are multiple receiver beams available for sensing a channel, the UE selects a receiver beam to sense the channel in the order of the RS index. In some embodiments, the UE selects a receiver beam corresponding to an indicated SSB index and then selects a receiver beam corresponding to an indicated CSI-RS resource index. In some embodiments, the UE is configured to receive a DCI that schedules an uplink transmission. In some embodiments, the DCI indicates QCL information that is used to determine a receiver beam used to sense a channel prior to uplink transmission. In some embodiments, the DCI includes DCI format 1_1, DCI format 0_1, DCI format 1_2, and / or DCI format 0_2. In some embodiments, the DCI includes an indication field for indicating the QCL information. In some embodiments, the QCL information indicates an RS index in an RS index set, and the RS index set is configured through RRC signaling and / or MAC-CE.

[0201] In some embodiments, the DCI schedules the first uplink transmission and the second uplink transmission. In some embodiments, the indication field in the DCI indicates QCL information for the first uplink transmission and / or the second uplink transmission. In some embodiments, the QCL information for the second uplink transmission is predefined. In some embodiments, the predefined QCL information includes at least one of the following: following the QCL information for the first uplink transmission and following predefined or preconfigured QCL information.

[0202] In some embodiments, the QCL information for the second uplink transmission is obtained from the QCL information of the downlink transmission, and the downlink transmission and the second uplink transmission are within the same channel occupancy. In some embodiments, the channel occupancy includes the channel occupancy of the base station. In some embodiments, the DCI indicates the first QCL information and the second QCL information, the first QCL information is used for the first uplink transmission, and the second QCL information is used for the second uplink transmission. In some embodiments, the existing indication field in the DCI indicates the QCL information for the first uplink transmission and / or the second uplink transmission. In some embodiments, the existing indication field in the DCI includes an SRS resource indication of DCI format 0_1, and / or a transmission configuration indication of DCI format 1_1, and / or a PUCCH resource indication of DCI format 1_0 and / or DCI format 1_1. In some embodiments, the dedicated indication field in the DCI indicates the QCL information for the first uplink transmission and / or the second uplink transmission.

[0203] In some embodiments, for uplink transmissions scheduled by DCI format 0_0 and / or DCI format 1_0, the QCL information is preconfigured and / or predefined. In some embodiments, for preconfigured QCL information, the preconfigured QCL information is determined based on the QCL information configured for the control resource set (CORESET) in which the UE detects the scheduled DCI. In some embodiments, the scheduled DCI schedules the uplink transmission, and / or the CORESET is the last CORESET before the UE sends the uplink transmission. In some embodiments, the distance between the CORESET and the uplink transmission includes a time interval. In some embodiments, the time interval is predefined or preconfigured. In some embodiments, the distance between the CORESET and the uplink transmission is defined as the duration after the last symbol of the CORESET and before the first symbol of the uplink transmission, with or without considering the timing advance. In some embodiments, the scheduled DCI is the last scheduled DCI before the UE sends the uplink transmission. In some embodiments, the distance between the scheduled DCI and the uplink transmission includes a time interval. In some embodiments, the time interval is predefined or preconfigured. In some embodiments, the distance between the scheduled DCI and the uplink transmission is defined as the duration after the last symbol of the scheduled DCI and before the first symbol of the uplink transmission, with or without considering the timing advance. In some embodiments, the UE is configured by the base station whether to provide QCL information for the channel access procedure for uplink transmission in the DCI scheduling the uplink transmission.

[0204] In some embodiments, the base station notifies the UE whether QCL information has been provided through RRC parameters. In some embodiments, when the base station notifies the UE that QCL information is not provided in the DCI, the UE determines the QCL information of the channel for sensing uplink transmission according to a predefined rule. In some embodiments, the predefined rule includes preconfigured QCL information and / or QCL information configured for the CORESET and / or QCL information for downlink transmission. In some embodiments, when the uplink transmission is PUCCH transmission, QCL information of the channel for sensing PUCCH transmission is configured in RRC signaling. In some embodiments, the RRC signaling includes a PUCCH configuration information element (IE). In some embodiments, when the uplink transmission is SRS transmission, QCL information of the channel for sensing SRS transmission is configured in RRC signaling. In some embodiments, the RRC signaling includes an SRS configuration IE.

[0205] In some embodiments, the UE senses a channel, and when the channel is sensed to be idle, the UE may access the channel. The sensing process includes: the UE senses the received energy and compares the sensed energy with an energy detection threshold (EDT). When the sensed energy is greater than the EDT, the channel is busy; otherwise, the channel is idle. That is, when the sensed energy is less than the EDT, the channel is idle and the UE may access the channel.

[0206] In some embodiments of the present disclosure, a channel access mechanism is extended to cover beamforming factors, which include two aspects: 1) EDT calculation and design; 2) energy sensing with beamforming. In addition, the UE performs a channel access procedure based on the EDT and a sensing beam associated with a downlink (DL) reference signal (RS) index. In an example, the sensing beam is non-omnidirectional and / or the direction of the sensing beam is in the direction of the transmission with beamforming.

[0207] For EDT calculation, in the traditional system, the calculation of EDT is as follows:

[0208] EDT depends on the maximum configured power P max and the actual transmitter output power p out Furthermore, EDT depends on the operating channel bandwidth.

[0209] Figure 4 A channel access mechanism according to an embodiment of the present disclosure is shown. Figure 4It is shown that in some embodiments, beamforming is not considered in the traditional channel access mechanism. Therefore, the UE senses energy from all directions, assuming that the transmission is also omnidirectional, and its coverage is limited by the distance d1. This means that, with the defined EDT, if the UE senses energy below the EDT, it can be ensured that when the UE accesses the channel (i.e., transmits), the transmission outside the coverage will not be interfered. When beamforming is applied, the transmission beam is focused in a given direction. Therefore, the coverage is increased, such as the distance d2, but the interference area is also increased. In order to potentially increase the channel access opportunities, the UE can apply a sensing beam when sensing energy. The sensing beam is oriented towards the direction to which the transmission with beamforming is directed. Since the UE no longer senses the channel from all directions, the sensing energy used for directional sensing (or non-omnidirectional sensing) is relatively less than the sensing energy used for omnidirectional sensing. In one example, the UE performs a channel access procedure before sending an uplink transmission, wherein the channel access procedure is related to an energy detection threshold (EDT) and / or a sensing beam. In some examples, the sensing beam includes at least one of the following: a reference signal with an index, a transmission configuration indication (TCI) state, and quasi co-location (QCL) information. In some examples, the sensing beam is non-omnidirectional (or directional), and / or the direction of the sensing beam is related to the direction of the transmission beam.

[0210] In the previous example, the interference area increases, while the collected sensing energy decreases. In order to protect other transmissions present in the channel, the EDT for directional sensing may have more restrictions. For EDT calculation, in the system of some embodiments of the present disclosure, the EDT is calculated as follows: In addition, EDT depends on at least one of the following: maximum configured power, actual transmitter output power, operating channel bandwidth, and first information A. In some examples, the value of A is a positive number in dBm. In some examples, the value of A is in the range of (0, B). Here B (or referred to as the first value) is the maximum value of A in dBm. In some examples, the value of B can be predefined and / or configured by a network such as a base station. Optionally, the UE reports the value of B to the network. In some examples, one or more candidate values ​​of B are predefined, and the UE can report one or more candidate values ​​of B supported to the network.

[0211] In some examples, the value of A is predefined. Optionally, the value of A is configured by the network. In some examples, the value of A is configured in system information. In some examples, the network configures the initial value of A in system information, and the network can adjust the value of A through RRC signaling and / or MAC-CE and / or DCI. The adjustment of the value is represented by A new =A old +△A . A new is the updated value of A. old It is the current value or initial value of A before adjustment. A is the indicated adjustment. In some examples, △ A Can be positive and / or negative. In some examples, ∆ is indicated in the MAC-CE and / or DCI. A In some examples, Δ A . In some examples, the determination of the value of A is related to the value of B.

[0212] Figure 5 The mapping between the transmitter beam from the base station and the receiver beam from the UE according to an embodiment of the present disclosure is shown. Figure 5 It is shown that in some embodiments, when the UE performs directional sensing, the UE uses a receiver beam to sense energy. In some examples, the receiver beam is indicated by the network. For example, the UE uses a receiver beam for downlink reception, where the downlink transmission is performed using a transmitter beam. The receiver beam corresponds to the transmitter beam. Figure 5 As shown, the base station has three transmitter beams and the UE has three receiver beams. For a given transmitter beam, there is a receiver beam that can match the transmitter beam, resulting in, for example, the maximum received SNR. The mapping between the transmitter beam and the receiver beam is known to the UE and / or the network. For downlink reception received by the UE from the network, the network notifies the UE of the transmitter beam used by indicating the QCL'ed downlink reference signal (DL RS) index. The DL RS index includes at least an SSB index, or an SSB candidate index, or a CSI-RS resource index. When the network indicates that the DL transmission is QCL type D with a DL RS index, this means that in order to receive the DL transmission, the UE should use the same receiver beam as the receiver beam used by the UE to receive the DL RS index. In this case, for directional sensing, the network can indicate the DLRS index with QCL type D to the UE, and the UE will use the corresponding receiver beam for directional sensing. In some embodiments, the transmission beam includes a transmission configuration indication (TCI) state and / or quasi-co-location (QCL) information. In some embodiments, the TCI state and / or QCL information is provided by a base station. In some embodiments, the TCI state and / or QCL information is associated with a first reference signal.

[0213] Figure 6 It is shown that the UE according to an embodiment of the present disclosure can use a receiver beam corresponding to other downlink (DL) reference signals (RS) for directional sensing. Figure 6In some examples, for uplink transmission by a UE, such as PUSCH, PUCCH, SRS, or PRACH, the network provides QCL information for uplink transmission, wherein the QCL information includes at least a DL RS index with QCL type D (e.g., SSB index or SSB candidate index or CSI-RS resource index). Figure 6 As shown, the network has three Tx beams represented by three SSB indices. Each Tx beam (SSB index) has a corresponding receiver (Rx) beam located on the UE side. When the network indicates SSB 2, the UE knows the Rx beam corresponding to SSB 2 that should be used. The UE will then use this Rx beam for directional sensing. In some examples, only the UE knows the connection between a given SSB index and an Rx beam. Optionally, both the UE and the network may know the connection, in which case the UE needs to report the connection to the network. Optionally, in some examples, the network also configures other DL RSs that have the same QCL type D relationship as the indicated SSB index. Then, as Figure 6 As shown, the UE can also use the Rx beams corresponding to other DL RSs for directional sensing. In this case, the UE can use one or more Rx beams for sensing, and the UE can select any one of the Rx beams, or optionally, when there is more than one Rx beam that can be used for directional sensing, there can be a predefined rule to select the Rx beam. An example is to follow the DL RS index order. Alternatively, first select the Rx beam corresponding to the SSB index, and then select the Rx beam corresponding to the CSI-RS resource index. In some embodiments, the transmission beam includes a transmission configuration indication (TCI) status and / or quasi-co-location (QCL) information. In some embodiments, the TCI status and / or QCL information is provided by the base station. In some embodiments, the TCI status and / or QCL information is related to the first reference signal.

[0214] In some examples, the UE receives a DCI that schedules an uplink transmission. In the DCI, the network provides QCL information, wherein the QCL information is used to determine a receiver beam for directional sensing before uplink transmission. In some examples, the DCI includes DCI format 1_1 and / or DCI format 0_1 ​​and / or DCI format 1_2 and / or DCI format 0_2. In some examples, the DCI includes an indication field for providing QCL information for directional sensing. In some examples, the QCL information provides a DL RS index, wherein the DL RS index includes at least one of the following: an SSB index, an SSB candidate index, and a CSI-RS resource index. In some examples, the QCL information indicates a DL RS index in a DL RS index set, wherein the DL RS index set is configured by RRC signaling and / or MAC-CE. In some examples, the uplink transmission includes at least one of the following: PUSCH, PUCCH, SRS, PRACH. In some examples, the DCI may schedule a first uplink transmission and a second uplink transmission. The indication field in the DCI provides QCL information for directional sensing of the first uplink transmission and / or the second uplink transmission. Optionally, the QCL information provided in the DCI is used for directional sensing of the first uplink transmission. And the QCL information for directional sensing of the second uplink transmission is predefined, wherein the predefined QCL information includes at least one of the following: QCL information for directional sensing of the first uplink transmission and QCL information for predefined or preconfigured.

[0215] In some examples, QCL information for directional sensing of a second uplink transmission is obtained based on QCL information of a downlink transmission, wherein the downlink transmission and the second uplink transmission are within the same channel occupancy. Optionally, the channel occupancy includes the gNB channel occupancy. Optionally, the DCI provides first QCL information and second QCL information, wherein the first QCL information is used for directional sensing of the first uplink transmission and the second QCL information is used for directional sensing of the second uplink transmission. In some examples, in the DCI, the QCL information for directional sensing is provided by an existing indication field. For example, an SRS resource indication of DCI format 0_1, and / or a transmission configuration indication of format 1_1, and / or a PUCCH resource indication of DCI format 1_0 and / or DCI format 1_1. In some examples, the QCL information for directional sensing is provided by a dedicated indication field. In some examples, for uplink transmissions scheduled by DCI format 0_0 and / or DCI format 1_0, the QCL information for directional sensing is preconfigured and / or predefined.

[0216] In some examples, for preconfigured QCL information, the QCL information may be determined based on the QCL information configured for the CORESET in which the UE detects the scheduling DCI. In some examples, the scheduling DCI schedules the uplink transmission. Optionally, the CORESET may be the last CORESET before the UE sends an uplink transmission. Optionally, the distance between the CORESET and the uplink transmission must be at least a time interval, where the time interval may be predefined or preconfigured. In some examples, the distance may be defined as the duration after the last symbol of the CORESET and before the first symbol of the uplink transmission, with or without considering the timing advance.

[0217] In some examples, the scheduling DCI is the last scheduling DCI before the UE sends an uplink transmission. Optionally, the distance between the scheduling DCI and the uplink transmission includes a time interval. Optionally, the time interval is predefined or preconfigured. Optionally, with or without considering the timing advance, the distance between the scheduling DCI and the uplink transmission is defined as the duration after the last symbol of the scheduling DCI and before the first symbol of the uplink transmission.

[0218] In some examples, the network may configure whether to provide QCL information for directional sensing of uplink transmissions in the DCI that schedules the uplink transmission. The network may use RRC parameters to inform the UE whether such QCL information has been provided. When the UE is notified that the QCL information is not provided in the DCI, the UE shall determine the QCL information for directional sensing of uplink transmissions according to predefined rules. For example, according to preconfigured QCL information and / or QCL information configured for the CORESET and / or QCL information for downlink transmissions.

[0219] In some examples, the uplink transmission is a PUCCH transmission, and QCL information for directional sensing of the PUCCH transmission is configured in RRC signaling, such as PUCCH-config IE. In some examples, the uplink transmission is an SRS transmission, and QCL information for directional sensing of the SRS transmission is configured in RRC signaling, such as SRS-config IE.

[0220] The commercial advantages of some embodiments are as follows. 1. Solve the problems in the prior art. 2. Provide a channel access mechanism at higher frequencies. 3. Provide good communication performance. 4. Provide high reliability. 5. Some embodiments of the present disclosure are used by 5G-NR chipset suppliers, V2X communication system development suppliers, automobile manufacturers including cars, trains, trucks, buses, bicycles, motorcycles, helmets, etc., drones (unmanned aerial vehicles), smartphone manufacturers, communication equipment for public safety, and AR / VR device manufacturers for games, conferences / seminars, and educational purposes. Some embodiments of the present disclosure are a combination of "techniques / processes" that can be adopted in 3GPP specifications to create a final product. Some embodiments of the present disclosure can be adopted in 5G NR unlicensed spectrum communications. Some embodiments of the present disclosure propose technical mechanisms.

[0221] Figure 7 7 is a block diagram of an exemplary system 700 for wireless communication according to an embodiment of the present disclosure. The embodiments described in the present disclosure may be implemented in a system using any appropriately configured hardware and / or software. Figure 7 A system 700 is shown, which includes at least a radio frequency (RF) circuit 710, a baseband circuit 720, an application circuit 730, a memory / storage 740, a display 750, a camera 760, a sensor 770, and an input / output (I / O) interface 780 coupled to each other as shown. The application circuit 730 may include circuits such as, but not limited to, one or more single-core or multi-core processors. The processor may include any combination of a general-purpose processor and a dedicated processor such as a graphics processor, an application processor, etc. The processor may be coupled to the memory / storage and configured to execute instructions stored in the memory / storage to enable various applications and / or operating systems running on the system.

[0222] The baseband circuit 720 may include circuits such as, but not limited to, one or more single-core or multi-core processors. The processor may include a baseband processor. The baseband circuit may handle various radio control functions, enabling communication with one or more radio networks via RF circuits. The radio control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, etc. In some embodiments, the baseband circuit may provide communications compatible with one or more radio technologies. For example, in some embodiments, the baseband circuit may support communications with an Evolved Universal Terrestrial Radio Access Network (EUTRAN) and / or other wireless metropolitan area networks (WMAN), wireless local area networks (WLAN), and wireless personal area networks (WPAN). An embodiment in which the baseband circuit is configured to support radio communications of more than one wireless protocol may be referred to as a multimode baseband circuit.

[0223] In various embodiments, the baseband circuit 720 may include circuits that operate with signals that are not strictly considered to be in the baseband frequency. For example, in some embodiments, the baseband circuit may include circuits that operate with signals having an intermediate frequency, which is between the baseband frequency and the radio frequency. The RF circuit 710 may use modulated electromagnetic radiation through a non-solid medium to achieve communication with a wireless network. In various embodiments, the RF circuit may include switches, filters, amplifiers, etc. to facilitate communication with the wireless network. In various embodiments, the RF circuit 710 may include circuits that operate with signals that are not strictly considered to be in the radio frequency. For example, in some embodiments, the RF circuit may include circuits that operate with signals having an intermediate frequency, which is between the baseband frequency and the radio frequency.

[0224] In various embodiments, the transmitter circuit, control circuit or receiver circuit discussed above regarding the user equipment, eNB or gNB may be embodied in whole or in part in one or more of the RF circuit, baseband circuit and / or application circuit. As used herein, "circuit" may refer to a portion of or include an application specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated processor or processor group) and / or memory (shared, dedicated memory or memory group) that executes one or more software or firmware programs, a combinational logic circuit and / or other appropriate hardware components that provide the functionality. In some embodiments, the electronic device circuit may be implemented in one or more software or firmware modules, or the functions associated with the circuit may be implemented by one or more software or firmware modules. In some embodiments, some or all of the constituent components of the baseband circuit, application circuit and / or memory / memory may be implemented together on a system on a chip (System On a Chip, SOC). The memory / memory 740 may be used, for example, to load and store data and / or instructions for the system. The memory / storage device of one embodiment may include any combination of suitable volatile memory such as dynamic random access memory (DRAM) and / or non-volatile memory such as flash memory.

[0225] In various embodiments, the I / O interface 780 may include one or more user interfaces designed to enable a user to interact with the system and / or a peripheral component interface designed to enable a peripheral component to interact with the system. The user interface may include, but is not limited to, a physical keyboard or keypad, a touchpad, a speaker, a microphone, etc. The peripheral component interface may include, but is not limited to, a non-volatile memory port, a Universal Serial Bus (USB) port, an audio jack, and a power interface. In various embodiments, the sensor 770 may include one or more sensing devices to determine environmental conditions and / or location information associated with the system. In some embodiments, the sensor may include, but is not limited to, a gyroscope sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit. The positioning unit may also be a part of a baseband circuit and / or an RF circuit, or interact with a baseband circuit and / or an RF circuit to communicate with a component of a positioning network such as a global positioning system (GPS) satellite.

[0226] In various embodiments, the display 750 may include displays such as liquid crystal displays and touch screen displays. In various embodiments, the system 700 may be a mobile computing device, such as but not limited to a laptop computer device, a tablet computer device, a netbook, an ultrabook, a smart phone, AR / VR glasses, etc. In various embodiments, the system may have more or fewer components and / or different architectures. Where appropriate, the methods described in this application may be implemented as a computer program. The computer program may be stored in a storage medium such as a non-transitory storage medium.

[0227] It is understood by those of ordinary skill in the art that each unit, algorithm, and step described and disclosed in the embodiments of the present disclosure can be implemented by using electronic hardware or a combination of software and electronic hardware for a computer. Whether these functions are performed in hardware or software depends on the application conditions and design requirements of the technical solution. Those of ordinary skill in the art can use different methods to implement the functions of each specific application, and such implementation should not exceed the scope of the present disclosure. It is understood by those of ordinary skill in the art that since the working processes of the above-mentioned systems, devices, and units are basically the same, reference can be made to the working processes of the systems, devices, and units in the above-mentioned embodiments. For ease of description and simplification, these working processes will not be described in detail.

[0228] It should be understood that the systems, devices and methods disclosed in the embodiments of the present disclosure may be implemented in other ways. The above embodiments are exemplary only. The division of units is based only on logical functions, and other divisions exist in actual implementation. Multiple units or components may be combined or integrated in another system. Certain features may also be omitted or skipped. On the other hand, the mutual coupling, direct coupling or communication coupling shown or discussed is operated indirectly or communicatively through some ports, devices or units in electrical, mechanical or other forms. The units described as separate components may or may not be physically separated. The units used for display may or may not be physical units, that is, located in one place or distributed on multiple network units. Some or all of the units are used according to the purpose of the embodiment. In addition, the various functional units in the various embodiments may be integrated in a physically independent processing unit, or in a processing unit having two or more units.

[0229] If the software functional unit is implemented, used and sold as a product, it can be stored in a readable storage medium in a computer. Based on this understanding, the technical solution proposed in the present disclosure can be essentially or partially implemented in the form of a software product. Alternatively, a part of the technical solution that is beneficial to conventional technology can be implemented in the form of a software product. The software product in the computer is stored in a storage medium, including multiple commands to enable a computing device (such as a personal computer, a server or a network device) to run all or part of the steps disclosed in the embodiments of the present disclosure. The storage medium includes a USB disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a floppy disk or other types of media capable of storing program code.

[0230] While the present disclosure has been described in connection with what is considered to be the most practical and preferred embodiments, it is to be understood that the disclosure is not limited to the disclosed embodiments but is intended to cover various arrangements pursuant to the broadest interpretation of the appended claims.

Claims

1. A wireless communication method, performed by a user equipment UE, the method comprising: performing a channel access procedure prior to sending an uplink transmission, wherein the channel access procedure is associated with a sensing beam, The sensing beam includes at least one of the following: a reference signal with an index and a transmission configuration indication TCI state, wherein the reference signal with an index includes a sounding reference signal SRS resource index, The UE applies the sensing beam when the UE performs a channel access procedure, wherein at least one of the reference signal with the index and the TCI state is received by the UE from a base station.

2. The method according to claim 1, wherein: The channel access procedure includes sensing a channel using the sensing beam and comparing the sensed energy with an energy detection threshold EDT.

3. The method according to claim 2, wherein: When the sensed energy is greater than the EDT, the channel is busy, and / or when the sensed energy is less than the EDT, the channel is idle.

4. The method according to claim 2 or 3, wherein: The sensing beam includes a receiver beam, and the UE uses the receiver beam to sense the channel.

5. The method according to claim 4, wherein: The receiver beam is correlated with the transmit beam.

6. The method according to claim 5, wherein: The transmission beam includes the TCI status and / or quasi co-sited QCL information.

7. The method according to claim 6, wherein: The TCI status and / or the QCL information are provided by the base station.

8. The method according to claim 6 or 7, wherein: The TCI state and / or the QCL information are related to a first reference signal.

9. The method according to claim 8, wherein: The first reference signal includes a downlink reference signal and / or an uplink reference signal.

10. The method according to claim 4, wherein: The base station indicates a reference signal RS index with QCL type D corresponding to the receiver beam to the UE, and the UE senses the channel using the receiver beam.

11. A wireless communication method, performed by a base station, the method comprising: controlling a user equipment UE to perform a channel access procedure before sending an uplink transmission, wherein the channel access procedure is associated with the sensing beam, The sensing beam includes at least one of the following: a reference signal with an index and a transmission configuration indication TCI state, wherein the reference signal with an index includes a sounding reference signal SRS resource index, When the UE performs a channel access procedure, the base station controls the UE to apply the sensing beam, wherein at least one of the reference signal with the index and the TCI state is sent by the base station to the UE.

12. The method according to claim 11, wherein: The channel access procedure includes sensing a channel using the sensing beam and comparing the sensed energy with an energy detection threshold EDT.

13. The method according to claim 12, wherein: When the sensed energy is greater than the EDT, the channel is busy, and / or when the sensed energy is less than the EDT, the channel is idle.

14. The method according to claim 12 or 13, wherein: The sensing beam includes a receiver beam, and the base station controls the UE to sense the channel using the receiver beam.

15. The method according to claim 14, wherein: The receiver beam is correlated with the transmit beam.

16. The method according to claim 15, wherein: The transmission beam includes the TCI status and / or quasi co-sited QCL information.

17. The method according to claim 16, wherein: The TCI status and / or the QCL information are provided by the base station.

18. The method according to claim 16 or 17, wherein: The TCI state and / or the QCL information are related to a first reference signal.

19. The method according to claim 18, wherein: The first reference signal includes a downlink reference signal and / or an uplink reference signal.

20. The method according to claim 14, wherein: The base station indicates a reference signal RS index with QCL type D corresponding to the receiver beam to the UE, and the base station controls the UE to sense the channel using the receiver beam.

21. A user equipment UE, comprising: Memory; Transceiver; and a processor coupled to the memory and the transceiver; The processor is configured to execute the method according to any one of claims 1 to 10.

22. A base station, comprising: Memory; Transceiver; and a processor coupled to the memory and the transceiver; The processor is configured to perform the method according to any one of claims 11 to 20.

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