WO2022028562A1

WO2022028562A1 - Communication method and apparatus

Info

Publication number: WO2022028562A1
Application number: PCT/CN2021/111099
Authority: WO
Inventors: 乔梁; 张佳胤; 范巍巍
Original assignee: 华为技术有限公司
Priority date: 2020-08-07
Filing date: 2021-08-06
Publication date: 2022-02-10
Also published as: CN114071535A

Abstract

Embodiments of the present application provide a communication method and apparatus, for use in improving the beam measurement accuracy of a terminal device in beam failure detection and/or beam failure recovery, thereby improving the success rate of beam measurement, and improving the communication efficiency. In the method, a network device sends a first message to a terminal device in a non-periodic manner, wherein the first message comprises a first reference signal, and the first reference signal comprises a beam failure detection-reference signal (BFD-RS) and/or a beam failure recovery-reference signal (BFR-RS); and then, the network device receives the measurement result of the terminal device.

Description

A communication method and device

This application claims the priority of the Chinese patent application with the application number 202010790761.7 and the title of the invention "a communication method and device", which was submitted to the State Intellectual Property Office of China on August 7, 2020, the entire contents of which are incorporated herein by reference middle.

technical field

The present application relates to the field of wireless communication, and in particular, to a communication method and apparatus.

Background technique

In a beam-based communication system, the quality of the beam will be affected due to the movement of objects around the terminal device or the rotation and occlusion of the terminal device itself. The degradation of the beam quality will directly lead to the degradation of the communication quality between the terminal device and the network device. Therefore, in order to deal with this phenomenon of beam failure, the new radio (NR) system introduces a beam failure recovery (BFR) mechanism.

Currently, in BFR, a network device periodically sends a reference signal (RS) applied to BFR to a terminal device, so that the terminal device uses the RS to perform a BFR mechanism to ensure the quality of communication with the network device. Generally, when the network device uses the same bandwidth part (BWP) to communicate with the terminal device, the beam direction of the communication beam can be the same. Therefore, the RS for BFR sent by the network device to the terminal device is related to BWP is configured periodically.

However, in the above configuration method, due to the periodic configuration method associated with the BWP, the communication situation of the current link cannot be reflected in time, so that the terminal equipment fails to use the periodically configured RS to measure the beam during beam measurement, which easily leads to the terminal equipment. The communication beam with the network device is interrupted, which affects the communication efficiency.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a communication method and apparatus, which are used to improve beam measurement accuracy of a terminal device in beam failure detection and/or beam failure recovery, improve beam measurement success rate, and improve communication efficiency.

A first aspect of the embodiments of the present application provides a communication method, which can be applied to a network device, and can also be applied to the execution of components of the network device (for example, a processor, a chip, or a chip system, etc.). In this method, the network device Send a first message to the terminal device in an aperiodic manner, where the first message includes the first reference signal, and the first reference signal includes beam failure detection-reference signal BFD-RS and/or beam failure recovery-reference signal BFR-RS; after that, the network equipment receives the measurement result of the terminal equipment.

Based on the above technical solution, the network device sends a first message for carrying a first reference signal to the terminal device in an aperiodic manner, where the first reference signal includes BFD-RS and/or BFR-RS, so that the terminal device can Beam failure detection and/or beam failure recovery is performed according to the first reference signal sent aperiodically. Compared with the periodic configuration, the beam measurement accuracy of the terminal device during beam failure detection and/or beam failure recovery can be improved, and the success rate of beam measurement can be improved, thereby avoiding the communication beam between the terminal device and the network device. Interrupt, improve communication efficiency.

In a possible implementation manner of the first aspect of the embodiment of the present application, the first message includes a downlink control information DCI message;

The first reference signal is carried in the channel system information request CSI request field in the DCI message; and/or,

The first reference signal is carried in the beamforming detection BF detection field used for beam failure detection in the DCI message; and/or,

The first reference signal is carried in the candidate beamforming detection Candidate BF Detection field used for candidate beam selection and/or beam failure detection in the DCI message.

Based on the above technical solutions, the first message sent by the network device to the terminal device in an aperiodic manner may be a DCI message, and the first reference signal carried in the first message may specifically be the channel system information request CSI in the DCI message request field, a beamforming detection BF detection field for beam failure detection, and/or a candidate beamforming detection Candidate BF Detection field for candidate beam selection and/or beam failure detection. When the first message is a DCI message, multiple implementation manners of the first reference signal in the first message are provided, so as to realize the flexible configuration of the first reference signal and improve the implementability of the solution.

In a possible implementation manner of the first aspect of the embodiment of the present application, the first message further includes first indication information, where the first indication information is used to indicate a beam direction in which the network device sends the DCI message.

Based on the above technical solution, the first message sent by the network device to the terminal device in an aperiodic manner may further include first indication information, where the first indication information is used to indicate the beam direction of the network device to send the DCI message . Exemplarily, the beam direction may instruct the network device to use the same beam direction to send and receive data, or instruct the network device to use multiple beam directions to send and receive data, so that the terminal device can communicate with the network device according to the beam direction, and improve the beam-based System stability of communication.

In a possible implementation manner of the first aspect of the embodiment of the present application, the network device sends the first message to the terminal device through at least one of the following downlink channels, including:

Corresponding to the downlink channel indicated by the control resource set corresponding to the first search space, where the first search space is used to search for aperiodic channel system information-reference signal CSI-RS; or,

The downlink channel indicated by the control resource set associated with the second search space, wherein the second search space is configured in the periodically configured beam failure detection and/or beam failure recovery parameters.

Based on the above technical solutions, the network device can send the first message to the terminal device through the downlink channel associated with the first search space or the second search space, providing multiple implementations of the downlink channel carrying the first message, and realizing the At the same time of flexible transmission of the first reference signal, the implementability of the solution is improved.

In a possible implementation manner of the first aspect of the embodiment of the present application, the first message further includes a time parameter of the first reference signal, where the time parameter includes a measured time parameter and/or a time parameter for reporting a measurement result and /or a first duration threshold, where the first duration threshold is used to indicate a duration for which the terminal device is allowed to perform listen-before-talk LBT.

Optionally, the time parameter may indicate time parameters such as a start time, an end time, and/or a timer.

Based on the above technical solutions, the first message sent in an aperiodic manner may also include a time parameter of the first reference signal, where the time parameter includes a time parameter for measurement and/or a time parameter for reporting measurement results and/or or the first duration threshold. The specific time parameter measured by the terminal device is provided, so that the terminal device can use the first reference signal to measure according to the time parameter, that is, the terminal device and the network device align the measurement process through the time parameter to further improve communication efficiency.

In a possible implementation manner of the first aspect of the embodiment of the present application, the duration indicated by the time parameter is less than the maximum channel occupation time MCOT or the remaining channel occupation time COT.

Based on the above technical solution, among the time parameters of the first reference signal, any one of the duration indicated by the time parameter is smaller than MCOT or COT, which ensures that different terminal devices can reasonably coexist and reduce transmission collisions when communicating on the shared frequency band, thereby further improving communication efficiency.

In a possible implementation manner of the first aspect of the embodiment of the present application, the first message further includes the number of times of measurement of the first reference signal and/or the number of times the terminal device is allowed to perform the LBT.

Based on the above technical solution, the first message sent in an aperiodic manner may further include the execution times of the first reference signal, and the execution times may include the measurement times of the first reference signal and/or allow the terminal device to execute The number of LBTs enables the terminal device to perform measurement using the first parameter according to the number of executions, that is, the terminal device and the network device align the measurement process through the number of executions to further improve communication efficiency.

In a possible implementation manner of the first aspect of the embodiment of the present application, before the network device sends the first message to the terminal device, the method further includes:

The network device determines that the number of non-acknowledgement information NACK from the terminal device is greater than the first threshold; and/or,

The network device determines that the number of failures of the listen-before-talk LBT is greater than the second threshold.

Based on the above technical solution, when the number of non-acknowledgement information NACKs received by the network device from the terminal device is greater than the first threshold, or when the number of LBT failures of the network device is greater than the second threshold, that is, when the network device determines to communicate with the terminal device When the communication quality between the devices is poor, the first message is sent to the terminal device in an aperiodic manner. This enables the terminal device to perform beam measurement according to the first parameter, so as to ensure smooth beam communication between the network device and the terminal device and avoid interruption of the communication beam between the two.

In a possible implementation manner of the first aspect of the embodiment of the present application, when the network device determines that the LBT is successful, the network device sends a first message to the terminal device.

Based on the above technical solution, the network device needs to perform LBT before sending the first message in an aperiodic manner, and only sends the first message to the terminal device when the LBT is successful. Therefore, the success rate of sending the first message can be improved, and when the network environment is relatively busy, transmission collisions can be reduced, and communication efficiency can be further improved.

In a possible implementation manner of the first aspect of the embodiment of the present application, the first message includes a control unit MAC CE for activating medium access control.

Based on the above technical solution, the first message sent by the network device to the terminal device in an aperiodic manner may also include an activated MAC CE message, that is, the first message may include a first reference signal and an activated MAC CE. The activated MAC CE may indicate a time-frequency domain resource that bears the first reference signal, and the network device sends the first reference signal to the terminal device after sending the activated MAC CE in the first message to the terminal device. Thus, another implementation manner of the first message is provided, and the flexibility of the solution implementation is improved.

The network device receives a first request message from the terminal device, where the first request message is used to request the first reference signal.

Based on the above technical solution, after the network device receives the first request message from the terminal device for requesting the first reference signal, the network device triggers to send the first message to the terminal device in an aperiodic manner, that is, the network device Based on the request of the terminal device, the first message is sent in an aperiodic manner. Wherein, when it is determined that the beam quality is poor, the terminal device can actively request the first reference signal to ensure the communication quality between the terminal device and the network device. Correspondingly, for the network device, the network device can subsequently trigger and execute the process of sending the first message to the terminal device according to the first request message, there is no need to configure the sending policy of the first message separately, and the signaling consumption of the network device can be further saved. .

In a possible implementation manner of the first aspect of the embodiment of the present application, the network device receives the first request message from the terminal device through at least one of the following uplink channels, including:

is associated with the uplink channel indicated by the control resource set corresponding to the first search space, where the first search space is used to search for aperiodic CSI-RS; or,

the uplink channel indicated by the control resource set associated with the second search space, where the second search space is configured in the periodically configured beam failure detection and/or beam failure recovery parameters; or,

The uplink channel corresponding to the secondary uplink SUL.

Based on the above technical solution, the terminal device may send the first request message to the network device through the uplink channel associated with the first search space or the second search space, or the uplink channel corresponding to the SUL. Various implementation manners of the uplink channel carrying the first request message are provided, so as to realize the flexible transmission of the first request message and improve the practicability of the solution.

In a possible implementation manner of the first aspect of the embodiment of the present application, the at least one uplink channel is a physical uplink control channel PUCCH, a physical uplink shared channel PUSCH, or a physical random access channel PRACH, and the at least one uplink channel contains The indicated reference signal RS is associated with the RS indicated by the control resource set corresponding to the second search space.

Based on the above technical solution, the uplink channel carrying the first request message may specifically be PUCCH, PUSCH or PRACH, and the RS indicated by the uplink channel is associated with the RS indicated by the control resource set corresponding to the second search space. The second search space comes from the configuration of the terminal device by the network device, and the first request message is sent by using the uplink channel corresponding to the RS associated with the RS indicated by the control resource set corresponding to the second search space, so that the The network device and the terminal device align the bearing mode of the first request message.

A second aspect of the embodiments of the present application provides a communication method, which can be applied to a terminal device, and can also be applied to the execution of components of the terminal device (for example, a processor, a chip, or a chip system, etc.). In this method, the terminal device Receive a first message sent from a network device in an aperiodic manner, where the first message includes a first reference signal, where the first reference signal includes beam failure detection-reference signal BFD-RS and/or beam failure recovery-reference signal BFR -RS; after that, the terminal device acquires a measurement result according to the first reference signal and sends it to the network device.

Based on the foregoing technical solutions, the terminal device receives a first message for carrying a first reference signal sent by a network device in an aperiodic manner, where the first reference signal includes BFD-RS and/or BFR-RS, so that the terminal The device may perform beam failure detection and/or beam failure recovery according to the first reference signal in the first message. Compared with the periodic configuration, the beam measurement accuracy of the terminal device during beam failure detection and/or beam failure recovery can be improved, and the success rate of beam measurement can be improved, thereby avoiding the communication beam between the terminal device and the network device. Interrupt, improve communication efficiency.

In a possible implementation manner of the second aspect of the embodiment of the present application, the first message includes a downlink control information DCI message;

Based on the above technical solutions, the first message that the terminal device receives from the network device and sent in an aperiodic manner may be a DCI message, and the first reference signal carried in the first message may specifically be a channel system information request in the DCI message The CSI request field, the beamforming detection BF detection field for beam failure detection, and/or the candidate beamforming detection Candidate BF Detection field for candidate beam selection and/or beam failure detection. When the first message is a DCI message, multiple implementation manners of the first reference signal in the first message are provided, so as to realize the flexible configuration of the first reference signal and improve the implementability of the solution.

In a possible implementation manner of the second aspect of the embodiment of the present application, the first message further includes first indication information, where the first indication information is used to indicate a beam direction in which the network device sends the DCI message.

Based on the above technical solution, the first message sent by the terminal device in an aperiodic manner from the network device further includes first indication information, where the first indication information is used to indicate the beam direction of the network device to send the DCI message. Exemplarily, the beam direction may instruct the network device to use the same beam direction to send and receive data, or instruct the network device to use multiple beam directions to send and receive data, so that the terminal device can communicate with the network device according to the beam direction, and improve the beam-based System stability of communication.

In a possible implementation manner of the second aspect of the embodiment of the present application, the terminal device receives the first message sent by the network device in an aperiodic manner through at least one of the following downlink channels, including:

Based on the above technical solutions, the terminal device can receive the first message sent from the network device through the downlink channel associated with the first search space or the second search space, and provide multiple implementations of the downlink channel that carries the first message. The flexible transmission of the first reference signal improves the achievability of the solution.

In a possible implementation manner of the second aspect of the embodiment of the present application, the first message further includes a time parameter of the first reference signal, where the time parameter includes a measured time parameter and/or a time parameter for reporting a measurement result and /or a first duration threshold, where the first duration threshold is used to indicate a duration for which the terminal device is allowed to perform listen-before-talk LBT.

In a possible implementation manner of the second aspect of the embodiment of the present application, the duration indicated by the time parameter is less than the maximum channel occupation time MCOT or the remaining channel occupation time COT.

In a possible implementation manner of the second aspect of the embodiment of the present application, the first message further includes the number of times of measurement of the first reference signal and/or the number of times the terminal device is allowed to perform the LBT.

In a possible implementation manner of the second aspect of the embodiment of the present application, before the terminal device receives the first message from the network device, the method further includes:

The terminal device sends a first request message to the network device, where the first request message is used to request the first reference signal.

Based on the above technical solution, after the terminal device sends a first request message for requesting the first reference signal to the network device, the terminal device will receive the first message from the network device, that is, the network device based on the request of the terminal device , the first message is sent in an aperiodic manner. Wherein, when it is determined that the beam quality is poor, the terminal device can actively request the first reference signal to ensure the communication quality between the terminal device and the network device. Correspondingly, for the network device, the network device can subsequently trigger and execute the process of sending the first message to the terminal device according to the first request message, there is no need to configure the sending policy of the first message separately, and the signaling consumption of the network device can be further saved. .

In a possible implementation manner of the second aspect of the embodiment of the present application, when at least one of the following conditions is satisfied, the terminal device sends a first request message to the network device, including:

When the terminal device determines that the demodulation of the target downlink message fails within the first time period, the target downlink message is carried on the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH between the network device and the terminal device;

or,

When the terminal device determines in the second time period that the number of failures of the listen-before-talk LBT is greater than a preset threshold.

Based on the above technical solutions, when the terminal device determines that the demodulation of the target downlink message fails within the first time period, the target downlink message is carried on the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH between the network device and the terminal device ; or, when the terminal device determines in the second time period that the number of failures of the listen-before-talk LBT is greater than the preset threshold, that is, when the terminal device determines that the communication quality with the network device is poor, it sends a message to the network device. A first request message for requesting a first reference signal. Subsequently, the terminal device may perform beam measurement according to the first parameter, so as to ensure smooth beam communication between the network device and the terminal device and avoid interruption of the communication beam between the two.

In a possible implementation manner of the second aspect of the embodiment of the present application, the terminal device sends the first request message to the network device through at least one of the following uplink channels, including:

The uplink channel corresponding to the secondary uplink SUL.

In a possible implementation manner of the second aspect of the embodiment of the present application, the at least one uplink channel is a physical uplink control channel PUCCH, a physical uplink shared channel PUSCH, or a physical random access channel PRACH, and the at least one uplink channel The indicated reference signal RS is associated with the RS indicated by the control resource set corresponding to the second search space.

In a possible implementation manner of the second aspect of the embodiment of the present application, the first message includes a control unit MAC CE for activating medium access control.

Based on the above technical solution, the first message sent by the network device in an aperiodic manner received by the terminal device may also include an activated MAC CE message, that is, the first message may include a first reference signal and an activated MAC CE. The activated MAC CE may indicate a time-frequency domain resource that carries the first reference signal, and the terminal device receives the first reference signal in the first message after receiving the activated MAC CE from the network device. Thus, another implementation manner of the first message is provided, and the flexibility of the solution implementation is improved.

A third aspect of the embodiments of the present application provides a communication device, including a transceiver unit:

The transceiver unit is configured to send a first message to the terminal device in an aperiodic manner, where the first message includes the first reference signal, and the first reference signal includes beam failure detection-reference signal BFD-RS and/or beam failure recovery - reference signal BFR-RS;

The transceiver unit is also used for receiving the measurement result of the terminal device.

In a possible implementation manner of the third aspect of the embodiment of the present application, the first message includes a downlink control information DCI message;

In a possible implementation manner of the third aspect of the embodiment of the present application, the first message further includes first indication information, where the first indication information is used to indicate a beam direction in which the network device sends the DCI message.

In a possible implementation manner of the third aspect of the embodiment of the present application, the transceiver unit sends the first message to the terminal device through at least one of the following downlink channels, including:

Corresponding to the downlink channel indicated by the control resource set corresponding to the first search space, wherein the first search space is used to search for aperiodic channel system information-reference signal CSI-RS; or,

In a possible implementation manner of the third aspect of the embodiment of the present application, the first message further includes a time parameter of the first reference signal, where the time parameter includes a time parameter for measurement and/or a time parameter for reporting a measurement result and /or a first duration threshold, where the first duration threshold is used to indicate a duration for which the terminal device is allowed to perform listen-before-talk LBT.

In a possible implementation manner of the third aspect of the embodiment of the present application, the duration indicated by the time parameter is less than the maximum channel occupation time MCOT or the remaining channel occupation time COT.

In a possible implementation manner of the third aspect of the embodiment of the present application, the first message further includes the number of times of measurement of the first reference signal and/or the number of times the terminal device is allowed to perform the LBT.

In a possible implementation manner of the third aspect of the embodiment of the present application, before the transceiver unit sends the first message to the terminal device, the apparatus further includes a processing unit;

the processing unit, configured to determine that the number of non-acknowledgement information NACK from the terminal device is greater than a first threshold; and/or,

The processing unit is used for the number of failures of the listen-before-talk LBT greater than the second threshold.

In a possible implementation manner of the third aspect of the embodiment of the present application, when it is determined that the LBT is successful, the transceiver unit sends a first message to the terminal device.

In a possible implementation manner of the third aspect of the embodiment of the present application, the first message includes a control unit MAC CE for activating medium access control.

In a possible implementation manner of the third aspect of the embodiment of the present application, before the transceiver unit sends the first message to the terminal device, the transceiver unit is further configured to receive a first request message from the terminal device, the first message A request message is used to request the first reference signal.

In a possible implementation manner of the third aspect of the embodiment of the present application, the transceiver unit receives the first request message from the terminal device through at least one of the following uplink channels, including:

The uplink channel corresponding to the secondary uplink SUL.

In a possible implementation manner of the third aspect of the embodiment of the present application, the at least one uplink channel is a physical uplink control channel PUCCH, a physical uplink shared channel PUSCH, or a physical random access channel PRACH, and the at least one uplink channel contains The indicated reference signal RS is associated with the RS indicated by the control resource set corresponding to the second search space.

In the third aspect of the embodiment of the present application, the component modules of the communication device may also be used to perform the steps performed in each possible implementation manner of the first aspect. For details, refer to the first aspect, which will not be repeated here.

A fourth aspect of the embodiments of the present application provides a communication device, including a transceiver unit;

The transceiver unit is configured to receive a first message sent from a network device in an aperiodic manner, where the first message includes a first reference signal, and the first reference signal includes a beam failure detection-reference signal BFD-RS and/or beam failure recovery - reference signal BFR-RS;

The transceiver unit is further configured to acquire a measurement result according to the first reference signal and send the measurement result to the network device.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, the first message includes a downlink control information DCI message;

In a possible implementation manner of the fourth aspect of the embodiment of the present application, the first message further includes first indication information, where the first indication information is used to indicate a beam direction in which the network device sends the DCI message.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, the transceiver unit receives, through at least one of the following downlink channels, the first message sent from the network device in an aperiodic manner, including:

In a possible implementation manner of the fourth aspect of the embodiment of the present application, the first message further includes a time parameter of the first reference signal, and the time parameter includes a measured time parameter and/or a time parameter for reporting a measurement result and /or a first duration threshold, where the first duration threshold is used to indicate the duration for which the terminal device is allowed to perform the listen-before-talk LBT.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, the duration indicated by the time parameter is less than the maximum channel occupation time MCOT or the remaining channel occupation time COT.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, the first message further includes the number of times of measurement of the first reference signal and/or the number of times the terminal device is allowed to perform the LBT.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, before the transceiver unit receives the first message from the network device, the transceiver unit is further configured to send a first request message to the network device, and the first message is sent to the network device. A request message is used to request the first reference signal.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, the device further includes a processing unit, and when at least one of the following conditions is satisfied, the transceiver unit sends a first request message to the network device, including:

When the processing unit determines within the first time period that the demodulation of the target downlink message fails, the target downlink message is carried on the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH between the network device and the terminal device;

or,

The processing unit determines in the second time period that the number of failures of the listen-before-talk LBT is greater than a preset threshold.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, the transceiver unit sends the first request message to the network device through at least one of the following uplink channels, including:

The uplink channel corresponding to the secondary uplink SUL.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, the at least one uplink channel is a physical uplink control channel PUCCH, a physical uplink shared channel PUSCH, or a physical random access channel PRACH, and the at least one uplink channel The indicated reference signal RS is associated with the RS indicated by the control resource set corresponding to the second search space.

In a possible implementation manner of the fourth aspect of the embodiment of the present application, the first message includes a control unit MAC CE for activating medium access control.

In the fourth aspect of the embodiment of the present application, the component modules of the communication device may also be used to perform the steps performed in each possible implementation manner of the second aspect. For details, refer to the second aspect, which will not be repeated here.

A fifth aspect of an embodiment of the present application provides a communication device, where the communication device may specifically be a network device, or may be a component of a network device (for example, a processor, a chip, or a chip system, etc.), wherein the communication device includes a processor and a A communication interface, which is coupled to the processor, and the processor is used for running a computer program or instructions, so that the method described in the foregoing first aspect or any one of the possible implementations of the first aspect is performed.

A sixth aspect of an embodiment of the present application provides a communication device, where the communication device may specifically be a terminal device, or may be a component of the terminal device (for example, a processor, a chip, or a chip system, etc.), wherein the communication interface and the processor Coupled, the processor is configured to run a computer program or instructions, so that the method described in the foregoing second aspect or any one of the possible implementations of the second aspect is performed.

A seventh aspect of the embodiments of the present application provides a computer-readable storage medium that stores one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the first aspect or any one of the first aspects. a possible implementation of the method described.

An eighth aspect of the embodiments of the present application provides a computer-readable storage medium that stores one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes any one of the second aspect or the second aspect above. a possible implementation of the method described.

A ninth aspect of the embodiments of the present application provides a computer program product (or computer program) that stores one or more computers. When the computer program product runs on a computer, the computer can execute the first aspect or any of the first aspect. One possible way to do it.

A tenth aspect of the embodiments of the present application provides a computer program product that stores one or more computers. When the computer program product is executed on a computer, the computer can perform the second aspect or any one of the possible implementations of the second aspect. Methods.

An eleventh aspect of the embodiments of the present application provides a chip system, where the chip system includes a processor configured to support an access network device to implement the functions involved in the first aspect or any possible implementation manner of the first aspect. In a possible design, the chip system may further include a memory for storing necessary program instructions and data of the access network device. The chip system may be composed of chips, or may include chips and other discrete devices.

A twelfth aspect of an embodiment of the present application provides a chip system, where the chip system includes a processor for supporting a terminal device to implement the functions involved in the second aspect or any possible implementation manner of the second aspect. In a possible design, the chip system may further include a memory for storing necessary program instructions and data of the terminal device. The chip system may be composed of chips, or may include chips and other discrete devices.

A thirteenth aspect of an embodiment of the present application provides a communication system, where the communication system includes the communication device of the third aspect and the communication device of the fourth aspect, or, the communication system includes the communication device of the fifth aspect and the sixth aspect The communication device of the aspect, or the communication system includes the communication device of the seventh aspect and the communication device of the eighth aspect, or the communication system includes the communication device of the ninth aspect and the communication device of the tenth aspect, or, the communication device A communication system includes the communication device of the eleventh aspect and the communication device of the twelfth aspect.

Wherein, for the technical effects brought by the third, fifth, seventh, ninth, eleventh, thirteenth aspects or any of the possible implementations thereof, reference may be made to the first aspect or the different possible implementations of the first aspect The technical effects brought about are not repeated here.

Wherein, for the technical effects brought by the fourth, sixth, eighth, tenth, twelfth, thirteenth aspects or any of the possible implementations thereof, reference may be made to the second aspect or the different possible implementations of the second aspect. The technical effects brought about are not repeated here.

It can be seen from the above technical solutions that in some embodiments provided by this application, the network device sends a first message to the terminal device in an aperiodic manner, where the first message includes the first reference signal, and the first reference signal Including beam failure detection-reference signal BFD-RS and/or beam failure recovery-reference signal BFR-RS; after that, the network device receives the measurement result of the terminal device. The network device sends a first message for carrying a first reference signal to the terminal device in an aperiodic manner, where the first reference signal includes BFD-RS and/or BFR-RS, so that the terminal device can Beam failure detection and/or beam failure recovery is performed by using the first reference signal sent in an aperiodic manner. Compared with the periodic configuration, the beam measurement accuracy of the terminal device during beam failure detection and/or beam failure recovery can be improved, and the success rate of beam measurement can be improved, thereby avoiding the communication beam between the terminal device and the network device. Interrupt, improve communication efficiency.

Description of drawings

1 is a schematic diagram of a network communication architecture in an embodiment of the application;

2 is another schematic diagram of a network communication architecture in an embodiment of the application;

3 is a schematic diagram of the implementation of the beam failure recovery mechanism BFR in an embodiment of the present application;

4 is a schematic diagram of a communication method in an embodiment of the application;

FIG. 5 is another schematic diagram of a communication method in an embodiment of the application;

6 is another schematic diagram of a communication method in an embodiment of the application;

FIG. 7 is another schematic diagram of a communication method in an embodiment of the present application;

FIG. 8 is another schematic diagram of a communication method in an embodiment of the present application;

FIG. 9 is another schematic diagram of a communication method in an embodiment of the present application;

10 is another schematic diagram of a communication method in an embodiment of the application;

11 is another schematic diagram of a communication method in an embodiment of the application;

FIG. 12 is another schematic diagram of a communication method in an embodiment of the application;

13 is a schematic diagram of a communication device in an embodiment of the present application;

FIG. 14 is another schematic diagram of a communication device according to an embodiment of the present application;

FIG. 15 is another schematic diagram of a communication device in an embodiment of the present application;

FIG. 16 is another schematic diagram of a communication device according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

First, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

(1) Terminal device: It can be a wireless terminal device that can receive scheduling and instruction information of network devices. The wireless terminal device can be a device that provides voice and/or data connectivity to users, or a handheld device with wireless connection function, or Other processing equipment connected to the wireless modem.

Terminal equipment can communicate with one or more core networks or the Internet via a radio access network (RAN), and the terminal equipment can be a mobile terminal equipment, such as a mobile phone (or "cellular" phone, mobile phone (mobile phone), computer and data cards, for example, may be portable, pocket-sized, hand-held, computer built-in or vehicle mounted mobile devices that exchange language and/or data with the radio access network. For example, personal communication service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), tablets Computer (Pad), computer with wireless transceiver function and other equipment. Wireless terminal equipment may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station (MS), a remote station, an access point ( access point (AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), subscriber station (SS), user terminal equipment (customer premises equipment, CPE), terminal (terminal), user equipment (user equipment, UE), mobile terminal (mobile terminal, MT), etc. The terminal device may also be a wearable device and a next-generation communication system, for example, a terminal device in a 5G communication system or a terminal device in a future evolved public land mobile network (PLMN).

(2) Network device: It can be a device in a wireless network. For example, a network device can be a radio access network (RAN) node (or device) that connects a terminal device to a wireless network, also known as a base station. . At present, some examples of RAN equipment are: generation Node B (gNodeB), transmission reception point (TRP), evolved Node B (evolved Node B, eNB), wireless network in the 5G communication system Controller (radio network controller, RNC), Node B (Node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved Node B , or home Node B, HNB), base band unit (base band unit, BBU), or wireless fidelity (wireless fidelity, Wi-Fi) access point (access point, AP), etc. In addition, in a network structure, the network device may include a centralized unit (centralized unit, CU) node, or a distributed unit (distributed unit, DU) node, or a RAN device including a CU node and a DU node.

Wherein, the network device can send configuration information to the terminal device (for example, carried in a scheduling message and/or an instruction message), and the terminal device further performs network configuration according to the configuration information, so that the network configuration between the network device and the terminal device is aligned; or , through the network configuration preset in the network device and the network configuration preset in the terminal device, the network configuration between the network device and the terminal device is aligned. Specifically, "alignment" refers to the determination of the carrier frequency for sending and receiving the interaction message, the determination of the type of the interaction message, the meaning of the field information carried in the interaction message, or the The understanding of other configurations of interactive messages is consistent.

In addition, in other possible cases, the network device may be other devices that provide wireless communication functions for the terminal device. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device. For convenience of description, the embodiments of the present application are not limited.

The network equipment may also include core network equipment, which includes, for example, an access and mobility management function (AMF), a user plane function (UPF), or a session management function (SMF) Wait.

In this embodiment of the present application, the apparatus for implementing the function of the network device may be the network device, or may be an apparatus capable of supporting the network device to implement the function, such as a chip system, and the apparatus may be installed in the network device. In the technical solutions provided by the embodiments of the present application, the technical solutions provided by the embodiments of the present application are described by taking the device for realizing the function of the network device being a network device as an example.

(3) The terms "system" and "network" in the embodiments of the present application may be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And/or", which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, which can mean: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are an "or" relationship. "At least one item(s) below" or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s). For example "at least one of A, B and C" includes A, B, C, AB, AC, BC or ABC. And, unless otherwise specified, ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, sequence, priority or importance of multiple objects degree.

As an aid to the licensed frequency band, deploying the communication system on the shared frequency band can not only improve the throughput of the communication system, but also solve the problem of shortage of spectrum resources. Under the background of the fifth-generation mobile communication technology, the technologies deployed in the shared frequency band are collectively called new radio unlicensed (new radio unlicensed, NRU).

The present application can be applied to an unlicensed band (unlicensed band) communication system as shown in FIG. 1 , including network equipment and multiple terminal equipments (UEs). In this communication system, UE1-UE5 can all communicate with network equipment, the link environment includes uplink, downlink and side-link, and the information transmitted in the link includes actually transmitted data information , and control information to indicate or schedule actual data. At the same time, UE3, UE4 and UE5 can also form a communication system, and the link transmission environment thereof is the same as the above, and the specific information exchange can depend on the configuration of the network.

In the shared frequency band, in addition to the current new radio (NR) system, it also includes other access systems such as radar (radar), wireless fidelity (WIFI), Bluetooth and other different operators. Therefore, regulations stipulate that systems operating in shared frequency bands need to support all or some of the following key technologies, namely, listen before talk (LBT), transmit power control (TPC) and dynamic spectrum selection (dynamic spectrum selection). frequency selection, DFS). Among them, the LBT mechanism means that various access devices must first obtain the interference situation on the frequency band where the target channel is located before using the channel. Only when the interference level on the target frequency band channel is less than or equal to the preset threshold value, the channel can be used. . The TPC mechanism means that in order not to affect the normal communication of other access devices, a sending device working on a shared authorization cannot increase its own transmit power without limitation. The DFS mechanism means that the system working on the shared license needs to avoid the frequency band where the high-priority system is located in time, and dynamically switch to the frequency band with lower interference to work.

In addition, unlike the fourth-generation mobile system, NR is a beam-based communication system, that is, the transmitter and receiver communicate by adjusting to the appropriate beam direction, as shown in Figure 2 below. In order to realize that the terminal and the base station can accurately obtain the transmit and receive beams of the transceiver. The NR system associates a beam with a reference signal (RS), that is, one beam corresponds to one RS, and the network device or terminal can obtain the sending or receiving direction of the beam through the identified RS ID. The RS here mainly includes synchronization information block (synchronization signal/PBCH block, SS/PBCH block), channel system information-reference signal (channel system information-reference signal, CSI-RS) and sounding reference signal (sounding reference signal, SRS) , where SRS is a reference signal used to obtain uplink quality.

The above beam-based communication system improves the reliable transmission of the system to a certain extent. But at the same time, due to the movement of surrounding objects or the rotation and occlusion of the terminal device itself, the quality of the beam will drop sharply. Especially for higher frequency bands, such as between 58 GHz and 71 GHz, systems operating in this frequency band will use narrower beams, such as frequency region 2 (FR2), FR2 includes 6 GHz ~ 52.6GHz, using up to 64 beams. The degradation of the beam quality will cause the UE to fail to receive the control information in the physical downlink control channel (PDCCH). Therefore, in order to deal with this phenomenon of beam failure, the NR system introduces a beam failure recovery mechanism (BFR).

Hereinafter, the BFR process is exemplified by taking the network device as the base station and the terminal device as the UE. The specific process is as follows:

In

steps

1 and 2, the base station configures the UE respectively with downlink reference signals for beam failure detection and candidate beam detection, such as SS/PBCH Block and/or CSI-RS, and each reference signal corresponds to a beam one-to-one. Assume that the reference signal set defined for beam failure detection is RS1set, which can be specifically beam failure detection-reference signal (BFD-RS), and can be configured in the radio link monitoring configuration (RadioLinkMonitoringConfig). The reference signal set used for candidate beam detection is RS2set, which may be beam failure recovery-reference signal (BFR-RS) specifically, and may be configured in the candidate beam reference signal list (candidateBeamRSList).

Further, after step 1 and step 2, the UE measures RS1set and RS2set respectively. Within a predefined time, when the layer1-signal-to-interference-and-noise ratio (L1-SINR) of all RSs in the detected RS1 set is lower than the threshold, and there is a certain The L1-SINR or layer 1-reference signal received power (layer 1-reference signal received power, L1-RSRP) of one or some RSs is higher than the threshold, and the UE reports the measurement result information to the upper layer (inside the UE). The threshold may be configured by the base station for the UE, or may be pre-configured inside the UE.

In step 3, the UE then initiates a random access (RA) to the base station, and requests radio resource control (radio resource control, RRC) re-establishment.

4) The UE monitors the designated PDCCH in the random access response window (random access response, RAR) to obtain relevant RRC reconfiguration information.

It should be further explained that step 3) and step 4) are a traditional random access process, which can support two access mechanisms based on contention and non-contention. After the terminal initiates RA through the physical random access channel (PRACH) channel, it will monitor the PDCCH in the RAR window to determine whether the access is successful. Among them, the RRC information after reconstruction will be different from the RRC information before reconstruction, and the former can be understood as a configuration that is more suitable for the current link condition.

Generally, when the network device uses the same bandwidth part (BWP) to communicate with the terminal device, the beam direction of the communication beam can be the same, and the RS for BFR sent by the network device to the terminal device is associated with the BWP. Configured periodically. Therefore, in Figure 3, for the BFD-RS for beam failure detection and the BFR-RS for candidate beam selection, they are a periodic reference signal that only follows the "downlink bandwidth part (BWP-Downlink)" and "Uplink Bandwidth Part (BWP-Uplink)" changes.

However, for systems operating in higher frequency bands or systems that share frequency bands, this periodic BFD-RS and BFR-RS can be understood as a "rough" configuration method, which is very likely to fail to reflect in time. The condition of the current link. For example, in a high-frequency communication system, due to the narrow beam, the beam between the base station and the UE is easily interrupted by the interference of the environment; while for the shared frequency band (that is, the unlicensed frequency band), due to the existence of the LBT mechanism, some Periodic RSs cannot be sent out, and for the UE, measurement inaccuracy is likely to occur.

To sum up, in the above configuration method, due to the periodic configuration method associated with the BWP, the communication situation of the current link cannot be reflected in time, so that the terminal equipment uses the periodically configured RS to fail in the beam measurement, and it is easy to This results in the interruption of the communication beam between the terminal device and the network device, which affects the communication efficiency.

In order to solve the above problems, the embodiments of the present application provide a communication method and apparatus, which are used to improve the beam measurement accuracy of a terminal device in beam failure detection and/or beam failure recovery, improve the success rate of beam measurement, and improve communication efficiency.

Referring to FIG. 4 , a communication method provided by an embodiment of the present application includes:

S101. The network device sends the first message to the terminal device in an aperiodic manner.

In this embodiment, the network device sends the first message to the terminal device in an aperiodic manner in step S101, and correspondingly, the terminal device receives the first message sent from the network device in an aperiodic manner in step S101.

Wherein, the first message includes a first reference signal, and the first reference signal includes one or more groups of beam failure detection-reference signals (Beam Failure Detection-Reference Signal, BFD-RS), and/or, one or more groups Group Beam Failure Recovery-Reference Signal (Beam Failure Recovery-Reference Signal, BFR-RS).

It should be noted that, in this embodiment, one or more groups of BFD-RS may be represented by BFD-RSs, BFD-RS sets or BFD-RS sets; one or more groups of BFR-RS may be represented by BFR-RS sets RSs, BFR-RS sets or BFR-RS sets.

Optionally, in the first reference signal, the CSI-RS may include one or more groups of BFD-RS, and/or, one or more groups of BFR-RS. Similarly, one or more groups of CSI-RS can be represented by CSI-RSs, CSI-RS sets or CSI-RS sets.

In a possible implementation manner, in the manner of periodically sending the CSI-RS based on the BWP, the network device may send the periodically sent CSI-RS to the terminal device at a fixed period. For example, when the period value is 10 milliseconds (ms), the network device will determine the time when the BWP value is set as the start time, and 10ms, 20ms...(10K) ms after the start time will send the message to the terminal. The device sends CSI-RS. Different from the method of periodically sending the CSI-RS, in step S101, after the network device determines to send the first message to the terminal device in an aperiodic manner according to the trigger condition, it immediately sends the first message to the terminal device, regardless of the starting moment. realization. Wherein, the triggering condition can be realized based on the judgment of the network device itself, or it can be realized based on the interaction of the terminal device. The following will describe the triggering condition through specific examples:

1. The network device determines that the number of non-acknowledgment (NACK) messages from the terminal device is greater than the first threshold; or, the network device determines that the number of failures of the listen-before-talk LBT is greater than the second threshold, and the network device determines to execute Step S101.

Specifically, when the number of non-acknowledgement information NACKs received by the network device from the terminal device is greater than the first threshold, or when the number of LBT failures of the network device is greater than the second threshold, that is, when the network device determines that it has a relationship with the terminal device When the quality of the communication between them is poor, the first message is sent to the terminal device in an aperiodic manner. This enables the terminal device to perform beam measurement according to the first parameter, so as to ensure smooth beam communication between the network device and the terminal device and avoid interruption of the communication beam between the two. Optionally, the first threshold and the second threshold may be preconfigured in the network device.

2. The network device may trigger the execution of step S101 to send the first message to the terminal device in an aperiodic manner after receiving the first request message from the terminal device for requesting the first reference signal. That is, the network device sends the first message to the terminal device in an aperiodic manner based on the request of the terminal device. Wherein, when it is determined that the beam quality is poor, the terminal device can actively request the first reference signal to ensure the communication quality between the terminal device and the network device. Correspondingly, for the network device, the network device can subsequently trigger and execute the process of sending the first message to the terminal device according to the first request message, there is no need to configure the sending policy of the first message separately, and the signaling consumption of the network device can be further saved. . Wherein, the first request message may be a scheduling request (scheduling request, SR) or other information.

Optionally, when the terminal device determines that the demodulation of the target downlink message fails within the first time period; or, when the terminal device determines within the second time period that the number of failures of listening before speaking LBT is greater than a preset threshold, that is, the When the terminal device determines that the quality of communication with the network device is poor, it sends a first request message for requesting the first reference signal to the network device. Wherein, the target downlink message is carried on a physical downlink control channel (PDCCH) or a physical downlink shared channel (physical downlink shared channel, PDSCH) between the network device and the terminal device, and the target downlink message may be Any downlink message in PDCCH or PUSCH. Subsequently, the terminal device may perform beam measurement according to the first parameter, so as to ensure smooth beam communication between the network device and the terminal device and avoid interruption of the communication beam between the two. Wherein, the first time period and the second time period may be preset values, for example, may be pre-configured on the terminal device, or configured from a network device, which is not specifically limited here.

In a possible implementation manner, before step S101, the terminal device may send the first request message to the network device through various uplink channels, including:

1) Send a first request message to the network device through the uplink channel indicated by the corresponding control resource set associated with the first search space (SearchSpace1), where the first search space is used to search for aperiodic CSI-RS.

Specifically, the first search space can be configured in "BeamFailureRecoveryConfig", or in "BWP-UplinkDedicated", or in "radioLinkMonitoringConfig", or other The configuration method will not be repeated here. Corresponding to a "SearchSpaceID", it can instruct the terminal device to search the time domain configuration information of the CORESET. The CORESET will contain the QCL relationship, and the terminal device can obtain the QCL reference in the CORESET after searching for this CORESET.

Optionally, the newly defined "SearchSpace1" field may correspond to one or more control resource sets (control resource sets, CORESETs), and these CORESETs have a QCL relationship. Wherein, the "SearchSpace1" field may include configuration information for monitoring beam failure detection, obtain configuration information of aperiodic BFR-RS set, and report the "Spatial Relation" reference of beam failure events to the base station.

2) Send the first request message to the network device through the uplink channel indicated by the control resource set associated with the second search space, where the second search space is configured for periodically configured beam failure detection and/or beam failure recovery in the parameter.

Specifically, the second search space may be a "recovery search space (recoverySearchSpace)" field in the DCI message.

Optionally, "recoverySearchSpace" may be configured in the parameter "BeamFailureRecoveryConfig". Each "recoverySearchSpace" corresponds to a CORESET, and each CORESET is configured with a transmission configuration indication (TCI-state). Among them, the TCI-state contains the QCL relationship, and the parameters "downlink control channel transmission configuration indication state activation list (tci-StatesPDCCH-ToAddList)" and "downlink control channel transmission configuration indication state release list (tci-StatesPDCCH-ToReleaseList)" )" to realize the configuration of activation and release, and the TCI-state contains the specific QCL type and RS. For example, when the parameter "Transmission Configuration Indication tci-PresentInDCI in Downlink Control Information" in CORESET is set to "enabled", and at the same time, the reference signal indicated in the TCI activated by "tci-StatesPDCCH-ToAddList" is ID: 2 SS/PBCH Block, namely SS/PBCH Block #2, qcl-type1 is "typeD". At this time, for the terminal device, by default, the terminal device can use the downlink receiving beam that receives the SS/PBCH Block #2 to receive the PDCCH channel where the CORESET is located.

3) Send the first request message to the network device through the uplink channel corresponding to the auxiliary uplink SUL.

Wherein, if the terminal device supports transmission of supplementary uplink (supplementary uplink, SUL), the first request message may be sent by using SUL.

Please refer to FIG. 5 , which is an example of an implementation process of communication in a SUL scenario. Wherein, the network device may send relevant configuration information to the terminal device through a downlink control information (download control information, DCI) message in advance, wherein, there may be multiple DCI fields (fields) in the DCI message. In the SUL scenario, the network device indicates to the terminal device whether the uplink channel used by the terminal device is sent on the SUL through the "uplink/auxiliary uplink indicator (UL/SUL indicator)" field in the DCI field. Exemplarily, when "UL/SUL indicator" is set to "1", it means that the uplink channel used to send the first request message is sent on the SUL, and the DCI format carrying this field is DCI format 0_0 or 0_1 or 0_2; optional Also, when the "UL/SUL indicator" is set to "0", it means that the uplink channel used to send the first request message is not sent on the SUL.

In addition, the SUL scenario also supports the semi-static configuration of the SUL carrier, that is, the switching of the non-SUL carrier and the SUL carrier is indirectly realized by switching the BWP. If the uplink channel sent on the SUL is PRACH or PUCCH, the uplink transmit beam used by the PRACH channel or PUCCH channel has the same spatial filtering characteristics as the CORESET corresponding to the first search space or the second search space (for example, the spatial filtering The characteristics can be QCL relationship, downlink/uplink beam consistency (DL/UL beam correspondence, etc.). Wherein, for the specific implementation process of the first search space and the second search space, reference can be made to the specific implementation of the first search space in the aforementioned 1) and the specific implementation of the second search space in 2), which will not be repeated here.

Before step S101, when the PUSCH channel used by the terminal to send the first request message is SUL, the PUSCH and the first SRS in the PUSCH use the same uplink transmission beam, according to the downlink/uplink beam consistency (DL/UL beam consistency) beam correlation), the uplink transmission beam used by the first SRS has the same spatial filtering characteristics as the CSI-RS, SS/PBCH Block or SRS indicated in the parameter "SRS-SpatialRelationInfo". That is, the terminal can use the downlink receive beam that receives CSI-RS or SSB information in "SRS-SpatialRelationInfo" as the uplink transmit beam of the first SRS, and the terminal can also use the uplink beam that sends the second SRS in "SRS-SpatialRelationInfo" as its SRS the uplink transmit beam. At this time, the uplink transmission beam used by the terminal to transmit the PUSCH is the same as the uplink transmission beam used to transmit the first SRS. Optionally, the parameter "SRS-SpatialRelationInfo" may be carried in the RRC parameter configured by the network device to the terminal device.

In addition, in the above multiple implementation manners of the uplink channel carrying the first request message, the uplink channel may specifically be PUCCH, PUSCH or PRACH. Optionally, the RS indicated by the uplink channel may be associated with the RS indicated by the control resource set corresponding to the second search space. The second search space comes from the configuration of the terminal device by the network device, and the first request message is sent by using the uplink channel corresponding to the RS associated with the RS indicated by the control resource set corresponding to the second search space, so that the The network device and the terminal device align the bearing mode of the first request message.

In a possible implementation manner, in step S101, the network device may send the first message to the terminal device in various ways, including:

1) Send the first message to the terminal device through the downlink channel indicated by the corresponding control resource set associated with the first search space (SearchSpace1). Wherein, the first search space is used to search for aperiodic channel system information-reference signal CSI-RS.

2) Send the first message to the terminal device through the downlink channel indicated by the control resource set associated with the second search space. Wherein, the second search space is configured in periodically configured beam failure detection and/or beam failure recovery parameters.

Specifically, for the implementation process of the first search space and the second search space, reference may be made to the implementation process of the first search space and the second search space in the aforementioned uplink channel, which will not be repeated here.

In a possible implementation manner, the first message may be a downlink control information (download control information, DCI) message sent by the network device to the terminal device, wherein there may be multiple DCI fields (fields) in the DCI message, and the first A reference signal can be carried in different DCI fields. Specifically, the first reference signal carried in the first message may specifically be a channel system information request CSI request field in the DCI message, a beamforming detection BF detection field used for beam failure detection, and/or, using Candidate beamforming detection Candidate BF Detection field for candidate beam selection and/or beam failure detection.

When the first message is a DCI message, the first message sent by the network device to the terminal device in an aperiodic manner may further include first indication information, where the first indication information is used to instruct the network device to send the DCI message beam direction. Exemplarily, the beam direction may instruct the network device to use the same beam direction to send and receive data, or instruct the network device to use multiple beam directions to send and receive data, so that the terminal device can communicate with the network device according to the beam direction, and improve the beam-based System stability of communication. The first indication information may specifically be that the parameter "repetition" in the CSI-RS is "on" or "off", so as to indicate the beam direction in which the network device sends the DCI message.

In a possible implementation manner, in step S101, the first message sent by the network device in an aperiodic manner may further include a time parameter of the first reference signal, where the time parameter includes the measured time parameter and/or Or report the time parameter of the measurement result and/or the first duration threshold, where the first duration threshold is used to indicate the duration for which the terminal device is allowed to perform the listen-before-talk LBT. That is, the specific time parameter that the terminal device measures according to the first reference signal, so that subsequent terminal devices can use the first reference signal to measure according to the time parameter. Optionally, the time parameter may indicate time parameters such as a start time, an end time, and/or a timer. Wherein, in the time parameter of the first reference signal, any one of the duration indicated by the time parameter is smaller than the channel occupancy time (COT) or the maximum channel occupancy time (maximum channel occupancy time, MCOT), to ensure that different terminal equipment When communicating on a shared frequency band, it can reasonably coexist and reduce transmission collisions, further improving communication efficiency.

In addition, in step S101, the first message sent by the network device in an aperiodic manner may further include the execution times of the first reference signal, and the execution times may include the measurement times of the first reference signal and/or allow the terminal The number of times the device executes the LBT, so that the terminal device can use the first parameter to perform measurement subsequently according to the number of executions.

A scenario in which the first message is a DCI message will be described below by using a specific example. Wherein, one or more groups of BFD-RS and/or one or more groups of BFR-RS in the first reference signal (CSI-RS) may be carried in different fields in the DCI. In step S101, it can be implemented by a combination of one or more of the following, including:

1. The network device carries the first reference signal (CSI-RS) through the "CSI request" field in the DCI field

Specifically, when the network device triggers the reporting of one or more groups of CSI-RS to the terminal device through the "CSI request" field, it can instruct the terminal device to use it for beam failure detection by default, or instruct the terminal device to perform scanning for the best downlink receiving beam /Selection, the terminal equipment can also be instructed to perform beam failure detection while scanning/selecting the best downlink receiving beam, which is not limited here.

Optionally, when the first reference signal includes a group of CSI-RS, the parameter "repetition" in the CSI-RS may be set to "on", and the network device fixes the DL transmission beam.

Optionally, when the first reference signal includes multiple groups of CSI-RS, the parameter "repetition" in the CSI-RS may be set to "on", wherein each group of CSI-RS has the same standard as the PDCCH channel or the PUCCH channel. Co-location (Quasi Co-Location, QCL) relationship. Optionally, the parameter "repetition" in the CSI-RS may be set to "off", and different CSI-RS resources in each group of CSI-RS have the same QCL relationship with the PDCCH channel or the PUCCH channel.

Wherein, the QCL relationship may indicate that the large-scale parameters experienced by the reference signal/channel (RS/channel) on a certain antenna port can be derived from the RS/channel on another antenna port. The large-scale parameters include delay spread, average delay, Doppler spread, Doppler shift, and Spatial RX parameters. It should be noted that, in this embodiment and subsequent embodiments, the "QCL relationship" can also be realized through other association relationships, such as the uplink/downlink beam correspondence (DL/UL beam correspondence), which instructs the terminal equipment to send the PUCCH/PUSCH The uplink transmit beam used is the same as the downlink receive beam used by the terminal equipment to receive PDCCH/PDSCH. In this embodiment and subsequent embodiments, only the QCL relationship is used as an example for description.

Optionally, increase the number of bits occupied by "CSI request", where the bits not only represent the CSI-RS parameter configuration information used for beam failure detection, but also include the reported time parameter and/or execution times, such as L1-SINR Or reporting time parameters, performing beam failure detection and/or performing the number of candidate beam selections, etc.

Specifically, the number of newly added bits in the "CSI request" field can be used to indicate the value of Y1, where Y1 indicates the length of time that the terminal device uses the CSI-RS to perform beam detection (beam failure detection and/or beam failure recovery), and also It can be understood as a timer. Optionally, Y1 includes not only the time length for instructing the UE to perform beam sounding, but also the time for instructing the terminal device to report the measurement result, and the total number of occupied bits is one or more of the following sets: {0,1, …,10}bits.

In addition, when the terminal equipment fails to report due to LBT or the network equipment does not receive the reported measurement result from the terminal equipment within the time period indicated by Y1, the terminal equipment returns to the BFR process, that is, the terminal equipment sends to its internal higher layer BFR event, request to trigger the BFR process.

Optionally, further bits may be added in the "CSI request" field, and the newly added bits use bits in the set {{1,2,...,10}bits} to represent CSI-RS and preamble/RACH-occasion mapping relationship, so that the terminal device can subsequently report the measurement result according to the mapping relationship.

2. The network device carries BFD-RS through the "BF detection" field in the DCI field

Among them, the "BF detection" field can be used to indicate one or more groups of BFD-RSs to the terminal device, and the subsequent terminal device can perform beam failure detection. Exemplarily, the number of bits occupied by the "BF detection" field is one or more of the following sets: {0, 1, 2..., 10}-bits.

Optionally, the network device configures and sends a set of BFD-RS to the terminal device through the "BF detection" field, and the terminal device uses the BFD-RS to use the beam direction for beam failure detection later, which is consistent with the terminal device within a certain time period. The direction in which the device receives the PDCCH channel and the PUCCH channel have the same QCL relationship.

Optionally, when the available bits in the "BF detection" field are 1 to 4 bits, the terminal device can be instructed how to detect the failed beam. For example, if the "BF detection" field has 2 bits in total, it can support up to 4 values, bit "00" indicates CSI-RS ID #1, bit "01" indicates CSI-RS ID #2, and so on. The terminal device indirectly obtains the corresponding CSI-RS ID by demodulating the "BF detection" field. After the subsequent terminal equipment performs measurement according to the first reference signal, it may report the channel system information-reference signal resource indicator (CSI-RS Resource Indicator, CSI-RS ID) together with the L1-RSRP to the network equipment, wherein the CSI-RSRP RS ID is also known as CRI.

3. The network device carries the BFR-RS through the newly defined "Candidate BF Detection" field in the DCI field

Among them, the newly defined "Candidate BF Detection" field can carry the BFR-RS used to instruct the terminal device to select candidate beams, and the number of occupied bits is one or more of the following sets: {0,1,2...,10}- bits.

Optionally, when the available bits in the "Candidate BF Detection" field are 1 to 4 bits, it can indicate how to detect the candidate beam to the terminal device. For example, if the "Candidate BF Detection" field has 2 bits in total, it can support up to 4 values, bit "00" indicates CSI-RS ID #1, bit "01" indicates CSI-RS ID #2, and so on. The terminal device indirectly obtains the corresponding CSI-RS ID by demodulating the "Candidate BF Detection" field. After measuring according to the first reference signal, the terminal device may report the CSI-RS ID together with the L1-RSRP to the network device.

In a possible implementation manner, in step S101, before the network device sends the first message in an aperiodic manner, it needs to perform LBT, and the network device sends the first message to the terminal device only when the network device successfully performs LBT. Therefore, the success rate of sending the first message can be improved, and when the network environment is relatively busy, transmission collisions can be reduced, and communication efficiency can be further improved.

In a possible implementation manner, in step S101, in the implementation process of the network device sending the first message to the terminal device in an aperiodic manner, the first message may include the first reference signal and the activation medium access control (media access control (media access control). access control control element, MAC CE), and sent to the terminal device through PDSCH. Wherein, the activated MAC CE may indicate a time-frequency domain resource bearing the first reference signal.

Optionally, in step S101, the network device may first send the activated MAC CE in the first message to the terminal device, where the activated MAC CE is used to indicate the time-frequency domain resource bearing the first reference signal. Wherein, in step S101, the terminal device may receive the first reference signal from the network device according to the time-frequency domain resource indicated by the activated MAC CE. This aperiodic manner may also be called a semi-persistent manner. Compared with the periodic configuration, the measurement flexibility of the terminal equipment in subsequent beam failure detection and/or beam failure recovery can be improved, and the success rate of beam measurement can be improved.

S102. The terminal device acquires the measurement result according to the first reference signal in the first message.

In this embodiment, the terminal device obtains the measurement result according to the first reference signal in the first message obtained in step S101.

Specifically, in step S102, the terminal device may use the BFD-RS in the first reference signal to perform the measurement process of beam failure detection according to the first reference signal obtained in step S101, and/or use the first reference signal The BFR-RS in the beam failure recovery measurement process, and obtain the corresponding measurement results.

Optionally, in step S102, if the terminal device fails to measure according to the first reference signal, for example, when the layer 1-signal-to-dry ratio detected by the terminal device according to the BFD-RS is lower than a threshold, and/or, When the layer 1-signal-to-dry ratio detected by the terminal device according to the BFR-RS is lower than the threshold, the terminal device can execute the BFR mechanism shown in FIG. 3 using the reference signal sent by the network device in a periodic manner.

S103, the terminal device sends the measurement result to the network device.

In this embodiment, the terminal device sends the measurement result obtained in step S102 to the network device.

In a possible implementation manner, in step S102, the terminal performs measurements according to one or more groups of CSI-RS resources configured by the network device in step S101, and after comparing with preset thresholds to obtain the measurement results, the terminal In step S103, the device sends the measurement result to the network device.

Exemplarily, if in the preset high-level parameters of the terminal device, the number of reference signals (nrofReportedRS) in the channel system message configuration report (CSI-ReportConfig) is set to "1", then the terminal device will use 1 decibel (decibel, dB). ) is the step size, using 7-bits to feed back the corresponding L1-RSRP quantization value in the range [-140,-44] decibel-milliwatt (decibel referenced to one milliwatt, dBm), and perform the measurement and obtain the measurement result in step S102 .

In addition, if in the preset high-level parameters of the terminal equipment, nrofReportedRS in CSI-ReportConfig is set to be greater than "1", or the parameter "group-based beam reporting (groupBasedBeamReporting)" is set to "enabled", the terminal equipment executes in step S102 After measuring and obtaining the measurement result, in step S103, the differential L1-RSRP reporting method is used for reporting. In this reporting method, the terminal equipment reports the quantized L1-RSRP measurement result with 1dB step size in addition to 7-bits. In addition to the value, the difference from the value of the strongest L1-RSRP measurement measured in 2dB steps using 4-bits is also included. Optionally, the terminal device may report the CRI together.

Optionally, the terminal device may use the implementation process of the periodically configured reference signal associated with the BWP to send the measurement result to the network device in step S103.

In this embodiment, the network device sends a first message for carrying a first reference signal to the terminal device in an aperiodic manner, where the first reference signal includes BFD-RS and/or BFR-RS, so that the terminal device can Beam failure detection and/or beam failure recovery is performed according to the first reference signal. Compared with the periodic configuration, the beam measurement accuracy of the terminal device during beam failure detection and/or beam failure recovery can be improved, and the success rate of beam measurement can be improved, thereby avoiding the communication beam between the terminal device and the network device. Interrupt, improve communication efficiency.

In the embodiment shown in FIG. 4 , the first message sent by the network device to the terminal device in an aperiodic manner includes a first reference signal, where the first reference signal includes a BFD-RS and/or a BFR-RS. The network device is a base station and the terminal device is a UE as an example, and the implementation process is described through the embodiments of FIGS. 6 to 12 .

Referring to FIG. 6, an embodiment of the present application provides another communication method, including:

S201. The UE sends a beam failure event to the base station.

The reasons for triggering the UE to send the beam failure event to the base station in step S201 mainly include the following two situations:

1) From the point of view of the base station, within a certain period of time: the base station detects that the number of NACKs fed back by the UE exceeds the threshold; the base station fails LBT several times in a row and exceeds the preset threshold.

2) From the perspective of the UE side, a certain period of time: the UE cannot successfully demodulate the information in the PDCCH or PDSCH; or, within this period of time, if there is uplink service transmission, the UE fails to LBT several times in a row , and exceeds the preset threshold.

In a possible implementation manner, when the UE reports the beam failure event in step S201, the reported content may be a scheduling request (SR) or other information, and the number of occupied bits is one or more of the following sets: { 0,1,2}-bits.

The uplink channel used by the UE to report the beam failure event to the base station may include:

1) An uplink channel that has a quasi-co-located QCL relationship with "recoverySearchSpace".

Optionally, "recoverySearchSpace" is configured in the parameter "BeamFailureRecoveryConfig". Each "recoverySearchSpace" will correspond to a control resource set CORESET, and each CORESET will be configured with a transmission configuration indication TCI-state, which contains the QCL relationship, through the parameters "tci-StatesPDCCH-ToAddList" and "tci-StatesPDCCH-ToReleaseList" realizes activation and release, and TCI-state contains specific QCL types and RSs.

For example, when the parameter "tci-PresentInDCI" in CORESET is set to "enabled", at the same time, the reference signal indicated in the TCI activated by "tci-StatesPDCCH-ToAddList" is the SS/PBCH Block whose ID is 2, that is, the SS/PBCH Block #2, qcl-type1 is "typeD". At this time, for the UE, by default, the UE can use the downlink receive beam that receives SS/PBCH Block #2 to receive the PDCCH channel where the CORESET is located.

Optionally, there are three uplink channels used by the UE to report the beam failure event, which are the physical uplink control channel (PUCCH), the physical uplink shared channel (PUSCH) and the PRACH.

Among them, the UE can use the PUCCH channel that has a QCL relationship, and the parameter "PUCCH-SpatialRelationInfo" exists in the PUCCH, which will have the same filtering characteristics as the included SS/PBCH Block, CSI-RS and SRS. Assuming that the RS configured by the parameter "PUCCH-SpatialRelationInfo" in the PUCCH is SS/PBCH Block#3, it means that the UE can take advantage of the reciprocity of the channel and use the downlink receive beam that receives the SS/PBCH Block#3 as it is used for transmission. The uplink transmit beam of PUCCH.

Alternatively, the UE may also use a PUSCH channel with a QCL relationship, and the PUSCH is often sent together with the SRS. The configuration parameters of the SRS include "SRS-SpatialRelationInfo", and similar to the parameter "PUCCH-SpatialRelationInfo" in the PUCCH channel, the UE can use the channel reciprocity to send the SRS. If the PUSCH channel contains SRS, the PUSCH and SRS will use the same uplink transmission beam. If it is not included, or the PUSCH is scheduled by DCI format 0_0, the uplink transmit beam used by PUSCH is either the same as the PUCCH resource with the lowest ID on the currently activated BWP, or the downlink receive beam with the lowest ID CORESET utilizes channel reciprocity. as the uplink transmit beam.

Alternatively, the UE can also use the PRACH channel, and the uplink transmission beam used by the PRACH channel has channel reciprocity with the receiving beam that receives the L-RSRP strongest SS/PBCH Block in the initial access process.

In a possible implementation manner, the above three uplink channels selected by the UE satisfy the following conditions: the RS indicated by the parameter "Spatial Relation" in the channel is the same as the RS indicated by the TCI parameter in the CORESET corresponding to "recoverySearchSpace".

2) Newly define "SearchSpace1", which corresponds to one or more CORESETs, and these CORESETs have a QCL relationship. The search space is used to monitor the configuration information of beam failure detection, obtain the configuration information of aperiodic BFR-RS set, and report the "Spatial Relation" reference of beam failure events to the base station. The uplink channel for the UE to report the beam failure event may also use one or more of PUSCH, PUCCH and PRACH, and the implementation process is similar to that in 1), which will not be repeated here.

3) If the UE supports transmission of supplemental uplink SUL, then transmit with SUL. The channel on the SUL link can also support PUSCH, PUCCH and PRACH, and the implementation process is similar to that in 1) and 2), which is not repeated here.

S202, the base station sends the BFD-RS to the UE.

S203: The UE judges whether it is received, if yes, executes step S204, and if not, executes step S205.

It should be noted that, in this embodiment, one or more groups of BFD-RS may be represented by BFD-RSs, BFD-RS sets, or BFD-RS sets. Wherein, the CSI-RS may include one or more groups of BFD-RS. Similarly, one or more groups of CSI-RS can be represented by CSI-RSs, CSI-RS sets or CSI-RS sets.

In steps S202 and S203, the base station sends one or more groups of CSI-RS sets to the UE, and the CSI-RS sets include one or more CSI-RSs resources. In this embodiment, the CSI-RSs resources are used for Beam failure detection.

In a possible implementation manner, the base station places the aperiodic configuration information carrying the BFD-RS set in the DCI, and sends it through the PDCCH channel, which has a QCL relationship with "recoverySearchSpace" or "SearchSpace1", for example, using a channel with "recoverySearchSpace" or "SearchSpace1" " or "SearchSpace1" corresponds to the same downlink transmit beam direction of the CORESET, and the UE also uses the downlink receive beam that receives "recoverySearchSpace" or "SearchSpace1" corresponding to the CORESET to receive the PDCCH channel carrying the aperiodic BFD-RS set configuration information.

1) The base station triggers a group of BFD-RSs (CSI-RS set) reporting to the UE through the DCI field "CSI request".

Among them, the parameter "repetition" in the CSI-RS set is set to "on", and the base station fixes the DL transmission beam, after which the UE defaults to beam failure detection; or, the UE performs beam failure detection while performing the optimal DL Rx beam. scan/select.

Optionally, increase the number of bits occupied by "CSI request", in which the bits not only represent the CSI-RS set parameter configuration information used for beam failure detection, but also include reporting information, such as L1-SINR or reporting time information.

2) The base station triggers the reporting of multiple groups of BFD-RSs (CSI-RS set) to the UE through the DCI field "CSI request".

Among them, the parameter "repetition" in the CSI-RS set is set to "on", each group of CSI-RS sets has the same QCL relationship with the PDCCH channel or PUCCH channel, and the behavior of the UE side also supports Alt1 and Alt2 in 1) one of.

Alternatively, set the parameter "repetition" in the CSI-RS set to "off", the different CSI-RS resources in each group of CSI-RS sets have the same QCL relationship with the PDCCH channel or PUCCH channel, and the behavior on the UE side also supports 1) One of Alt1 and Alt2.

3) Newly define DCI field1, such as "BF detection", which is used to send one or more groups of BFD-RSs to the UE, instructing the UE to perform beam failure detection, and the number of occupied bits is one or more of the following sets: {0, 1,2…,10}-bits.

Wherein, the base station configures and sends a group of BFD-RSs to the UE, the direction of which has the same QCL relationship as the direction in which the UE receives the PDCCH channel and the PUCCH channel within a certain period of time. When a CSI-RS set is triggered by DCI, the bits in "CSI request" or "BF detection" are used to indicate the Y1 value, which indicates the time when the UE performs beam failure detection, which can also be understood as a timer. Optionally, the Y1 value includes not only the time used to instruct the UE to perform beam failure detection, but also the time to instruct the UE to report, and the total number of occupied bits is one or more of the following sets: {0,1,..., 10}bits. Its schematic diagram is shown in Figure 7 below.

S204, the UE performs measurement on the designated BFD-RS.

S205, the UE returns to the BFR process.

In step S204 and step S205, when the UE fails to report due to LBT or the gNB does not receive the reported measurement result information from the UE within the time Y1, it returns to the BFR process. That is, the UE sends a BFR event to a higher layer inside the UE to request to trigger the BFR process shown in FIG. 3 .

In addition, for the implementation process of step S204 and step S205, reference may be made to the implementation process of step S102 and step S103 in the foregoing embodiment, and details are not repeated here.

The embodiment shown in FIG. 6 proposes a method for performing beam failure detection based on aperiodic BFD-RS, and this method improves the accuracy of the UE performing beam detection.

The embodiment shown in FIG. 6 includes at least the following beneficial effects: adding aperiodic CSI-RSs (ie BFD-RSs) for beam failure detection; the newly defined "SearchSpace1" is used to search for aperiodic BFD-RSs, and its corresponding CORESET to provide spatial relation reference of relevant uplink channels; newly define DCI field (such as "BF detection") to trigger aperiodic CSI-RS for beam failure detection; increase the number of bits occupied by "CSI request", additional The bits are used to indicate the BFD-RS set setting in the BFR process and the configuration information (ie the Y1 value) of the UE performing beam failure detection time and/or reporting time; Information on time and/or reporting time (ie Y1 value).

Referring to FIG. 8, an embodiment of the present application provides another communication method, including:

S301. The UE sends a beam failure event to a base station.

In step S301, the UE sends an acknowledgment beam failure detection event to the base station through the uplink channel, and the transmission beam direction used by the uplink channel and the "spatial relation" of the CORESET corresponding to "recoverySearchSpace" and/or "SearchSpace1" exist in the channel Reciprocity or have the same RS. The supported uplink channels may be one or more of PUSCH, PUCCH and PRACH, and the implementation process is similar to the configuration of step S201 in Embodiment 1 shown in FIG. 6 , and details are not repeated here.

The content reported by the UE may be SR or other information, and the number of occupied bits is one or more of the following sets: {0,1,2}-bits.

If the UE supports SUL transmission, PUSCH, PUCCH and PRACH can be uploaded through the SUL channel. Its schematic diagram is shown in Figure 7.

S302, the base station sends the BFR-RS to the UE.

S303, the UE judges whether it is received, if yes, executes step S304, if not, executes step S305;

It should be noted that, in this embodiment, one or more groups of BFR-RSs may be represented by BFR-RSs, BFR-RS sets or BFR-RS sets. Wherein, the CSI-RS may include one or more groups of BFR-RS. Similarly, one or more groups of CSI-RS can be represented by CSI-RSs, CSI-RS sets or CSI-RS sets.

In step S302 and step S303, the base station sends one or more groups of CSI-RS sets (BFR-RS sets) to the UE, which can send BFR-RSs resources through one of the following two DCI fields:

1) Multiplexing the "CSI request" field. At this time, the UE can use the following two types of channels to report candidate beams:

a) If the UE uses PRACH to report candidate beams,

Optionally, the uplink transmit beam used by the PRACH channel has channel reciprocity with the receive beam that receives the strongest L-RSRP SS/PBCH Block in the initial access process.

Optionally, new bits can be added in the "CSI request" field, and the bits in the set {{1,2,...,10}bits} can be used to represent the mapping relationship between CSI-RS and preamble/RACH-occasion. That is to say, after receiving the preamble sent by the UE through the PRACH channel, the CSI-RS ID associated with the preamble index can be obtained, and the candidate beam can be obtained accordingly. For example, when part of the bits received in the "CSI request" field is "0001", it means that CSI-RS ID #1 corresponds to Preamble index #1, and when part of the bits received in the "CSI request" field is " 0001", it means that CSI-RS ID #1 corresponds to Preamble index #1.

In addition, the relationship between CSI-RS and preamble/RACH-occasion can be indicated by the parameter "ra-OccasionList", and other new parameters can also be redefined, such as "CSIRS-Occasion". The number of bits that can be used is the number of bits in the parameter. one or more {0,1,2,…,10} bits;

Optionally, after the UE uses PRACH to report the candidate beam, the RRC will be re-established, that is, the parameters in the upper RRC layer on the UE side will be changed.

b) UE uses PUSCH/PUCCH to report candidate beams,

Optionally, the UE reports the acknowledgment information through the PUCCH/PUSCH that has the same "spatial relation" relationship with the CORESETs corresponding to "recoverySearchSpace" and/or "SearchSpace1". The reported information can be a 1-bit ACK (explicit) or a specific uplink data service (implicit).

2) A newly defined DCI field, such as "Candidate BF Detection", instructs the UE to select a candidate beam, and the number of occupied bits is one or more of the following sets: {0,1,2...,10}-bits.

a) The UE uses PRACH to report candidate beams, and the implementation process is similar to a) in 1), which is not repeated here.

b) The UE uses PUSCH/PUCCH to report candidate beams, and the implementation process is the same as b) in 1), which will not be repeated here.

The base station sends the configured one or more sets of aperiodic CSI-RSs resources to the UE through the PDCCH channel. The beam used by the PDCCH channel or the corresponding CORESET-1 in the PDCCH and the "recoverySearchSpace" corresponding CORESET-2 have the same QCL relationship . The UE performs corresponding operations according to the parameter "repetition" in the CSI-RS set.

The base station can use one DCI to trigger one or more sets of CSI-RS sets to instruct the UE to perform candidate beam selection, or can trigger one or more sets of CSI-RS sets through multiple DCIs to instruct the UE to perform candidate beam selection.

In a possible implementation, take one DCI degaussing triggering two sets of CSI-RS sets as an example:

When the parameter "repetition" is set to "on", the base station fixes the downlink transmit beam, and the UE adjusts the downlink receive beam; when the parameter "repetition" in sets is set to "off", the UE selectively fixes the receive beam or adjusts the receive beam at the same time .

Specifically, if the "CSI request" field is used. The bits in this field indicate measurement time and/or reporting time information in addition to BFR-RSs for candidate beam selection:

Alt1: The base station is configured with Y1, Y2, and Y3, which represent the beam measurement time and reporting time, respectively. Y1 and Y2 respectively represent the beam measurement time, and Y3 represents the reporting time; optionally, when Y1 and Y2 respectively represent the beam measurement time, Y3 represents the reporting time.

Alt2: The base station configures a value Y4, the value of which is greater than or equal to the sum of Y1+Y2+Y3.

Exemplarily, FIG. 9 may represent a situation in which the UE is instructed to measure and report the candidate beam through "CSI request". In the example of FIG. 9 , when the configuration mode is Alt2, that is, the base station only configures the Y4 value, which includes the measurement time and the reporting time. When the configuration mode is Alt1, in this example, Y1 and Y2 respectively represent the measurement duration of the UE, and Y3 represents the duration.

Also, if using a newly defined DCI field, such as "Candidate BF Detection". The bits in this field indicate measurement time and/or reporting time information in addition to BFR-RSs for candidate beam selection:

Alt1: The base station configures the candidate beam selection measurement time and reporting time information respectively.

Optionally: the base station configures Y1, Y2 and Y3 respectively, which represent beam measurement time and reporting time, respectively. Among them, Y1 and Y2 represent the beam measurement time respectively, and Y3 represents the reporting time;

Optionally: the base station configures a value Y4, the value of which is greater than or equal to the sum of Y1+Y2+Y3.

Alt2: The base station configures the candidate beam selection measurement time.

Optionally: the base station configures Y1 and Y2 respectively, and Y1 and Y2 respectively represent the beam measurement time;

Optionally: the base station configures a value Y4, the value of which is greater than or equal to the sum of Y1+Y2.

Exemplarily, FIG. 10 may represent a situation in which the UE is instructed to measure the candidate beam through the newly defined DCI field "Candidate BF Detection". In this example of Fig. 10, Y1 and Y2 respectively represent the measurement duration of the UE. During Y1 time, when the base station sets the parameter "repetition" in the CSI-RS set to "on", the base station fixes the downlink transmit beam, and the UE adjusts the downlink receive beam. During Y2, when the base station sets the parameter "repetition" in the CSI-RS set to "off", the base station adjusts the downlink transmit beam. At this time, the UE can fix the downlink receive beam or adjust the downlink receive beam along with it.

S304, the UE performs measurement on the designated BFR-RS;

S305, the UE returns to the BFR process.

Wherein, for the implementation process of step S304 and step S305, reference may be made to the implementation process of step S102 and step S103 in the foregoing embodiment, and details are not repeated here.

The embodiment shown in FIG. 8 proposes a method for performing candidate beam selection based on aperiodic BFR-RS. By this method, the accuracy of the UE performing the candidate beam detection is improved.

Among them, the embodiment shown in FIG. 8 includes at least the following beneficial effects: adding aperiodic CSI-RS (ie BFR-RS set) for candidate beam selection; newly defining DCI field (such as "Candidate BF Detection"), using Aperiodic CSI-RS to trigger candidate beam selection; increase the number of bits occupied by "CSI request", and additional bits are used to indicate the BFR-RS set parameter setting and the configuration of the UE's candidate beam selection time and/or reporting time; increase The number of bits occupied by "CSI request" or newly defined or added bits in the parameter "Candidate BF Detection" are used to indicate the relationship between CSI-RS and preamble/RO; the newly defined "Candidate BF Detection" uses the candidate beam that contains the UE execution Select time and/or report time information.

Referring to FIG. 11, an embodiment of the present application provides another communication method, including:

S401. The UE sends a beam failure event to a base station;

In step S401, the reason for triggering the UE to send the beam failure event to the base station is the same as the reason mentioned in step 1) in the embodiment shown in FIG. 6 . The transmission beam direction used by the uplink channel used for reporting and the "spatial relation" of the CORESET corresponding to "recoverySearchSpace" and/or "SearchSpace1" respectively have channel reciprocity or have the same RS. Supportable uplink channels may be one or more of PUSCH, PUCCH and PRACH. The related discussion and configuration parameters are the same as the configuration of step 1) in the embodiment shown in FIG. 6 .

Optionally, the content reported by the UE may be SR or other information, and the number of occupied bits is one or more of the following sets: {0,1,2}-bits. If the UE supports SUL transmission, PUSCH, PUCCH and PRACH can be uploaded through the SUL channel.

S402, the base station sends the BFD-RS and the BFR-RS to the UE;

S403, the UE judges whether it is received, if yes, executes step S404, if not, executes step S405;

It should be noted that, in this embodiment, one or more groups of BFD-RS may be represented by BFD-RSs, BFD-RS sets or BFD-RS sets; one or more groups of BFR-RS may be represented by BFR-RS sets RSs, BFR-RS sets or BFR-RS sets. In addition, the CSI-RS may include one or more sets of BFD-RS, and/or, one or more sets of BFR-RS. Similarly, one or more groups of CSI-RS can be represented by CSI-RSs, CSI-RS sets or CSI-RS sets.

In steps S402 and S403, the base station sends one or more groups of CSI-RSs to the UE, which include BFD-RSs and BFR-RSs.

The base station sends the aperiodic CSI-RSs configuration information through the PDCCH channel, and the beam direction for sending the channel has a QCL relationship with the RSs in the CORESET corresponding to "recoverySearchSpace" or "SearchSpace1". The adopted DCI field can reuse "CSI request", or use a new DCI field1, such as "BF Detection and Selection", and the number of occupied bits is one or more of the following sets: {0,1,2...,10} -bits.

For the case of multiplexing "CSI request", the method is similar to step 2) in the second embodiment, that is, the UE and the base station perform corresponding beam operations according to the parameter "repetition" in the CSI-RS set. Optionally, the number of bits of this parameter can also be increased to indicate the time information for UE to perform measurement and reporting and the mapping relationship between CSI-RS and preamble/RO. If the base station uses a new DCI field1, this field not only contains instructions for UE to perform corresponding beam operations, but also contains time information for UE to perform measurement and/or reporting and the mapping relationship between CSI-RS and preamble/RO. The method is similar Step 2) in Example 2. Correspondingly, for the time configuration manner for indicating UE measurement and reporting, reference may be made to the processes shown in FIG. 9 and FIG. 10 , which will not be repeated here.

The base station triggers one or more groups of "CSI-RS sets" and sends them through the PDCCH that has a QCL relationship with the CORESET corresponding to "recoverySearchSpace"; the UE performs corresponding beam scanning according to the parameter "repetition" in the CSI-RS set.

1) For the case where the base station triggers multiple groups of "CSI-RS sets", take triggering two groups of CSI-RS sets as an example:

Specifically, if the parameter "repetition" in the CSI-RS sets is set to "on", the base station fixes the downlink transmission beam, and the UE performs one of the following operations:

Alt 1: Perform beam scanning in the direction of downlink transmit beam failure for candidate downlink receive beam selection;

Alt 2: Default beam failure detection.

In addition, if the parameter "repetition" in CSI-RS sets is set to "off", the UE performs one of the following operations:

Alt 1: Fixed downlink receive beam;

Alt 2: Adjust the downlink receiving beam at the same time;

Alt 3: Default beam failure detection.

During the time period, when the UE cannot report due to LBT failure or the base station does not receive the reported measurement result information from the UE, it returns to the BFR process.

In addition, it should be noted that, in this embodiment, after the measurement ends, the UE only supports candidate beam reporting.

S404, the UE performs measurement on the designated BFD-RS and BFR-RS;

S405, the UE returns to the BFR process.

Wherein, for the implementation process of step S404 and step S405, reference may be made to the implementation process of step S102 and step S103 in the foregoing embodiment, and details are not repeated here.

The embodiment shown in FIG. 11 proposes a method for beam failure detection and candidate beam selection based on aperiodic CSI-RSs, which improves the measurement accuracy of the UE. The embodiment shown in FIG. 11 includes at least the following beneficial effects: adding aperiodic CSI-RSs for beam failure detection and candidate beam selection; the newly defined "SearchSpace1" is used to search for aperiodic CSI-RSs, which corresponds to The CORESET provides a "spatial relation" reference for the relevant uplink channels; newly defined DCI fields (such as "BF Detection and Selection") are used to trigger the UE to perform beam failure detection and aperiodic CSI-RSs for candidate beam selection; add "CSI request" "Number of occupied bits, extra bits are used to indicate: BFD-RSs resource and BFR-RSs resource setting, UE performs beam failure detection and candidate beam selection time and/or reporting time configuration and indicates CSI-RS and preamble/RO relationship, etc.

Referring to FIG. 12, an embodiment of the present application provides another communication method, including:

S501, the UE performs LBT;

S502, the UE judges whether the LBT successfully occupies the channel, if yes, executes step S503, if not, executes step S504;

For the system working in the shared frequency band, the transmitter needs to implement the LBT mechanism before sending any information, and the channel can only be used after confirming that the occupied channel is free.

In the embodiment shown in Fig. 6, Fig. 8, Fig. 11,

In a possible implementation, the UE, as a transmitter, needs to:

1) Report the beam failure event or the confirmation information of the beam failure event;

2) Report the selected best candidate beam information.

In 1), when the UE reports the beam failure event or the confirmation information of the beam failure event, because it needs to perform LBT, when the number or time of the UE performing LBT exceeds the preset threshold, the UE will return to the BFR process.

It should be noted that after the UE reports the confirmation information of the beam failure event (ie, the embodiment corresponding to FIG. 8 ), the base station sends one or more sets of CSI-RSs resources to indicate the UE candidate beam measurement, and also configures the relevant time information. , such as reporting time information. The reporting time information of this configuration needs to include time information that tolerates the failure of the UE to perform LBT, such as the time information Y4 in the embodiment corresponding to FIG. 8 , and its value may also include the time Y5 when the UE performs LBT. At this time, when Y4 exceeds the preset time threshold value Y0, the UE will automatically fall back to the BFR process.

In 2), the base station has already configured the measured time information for the UE, so it also supports the base station to configure the time information Y6 that tolerates LBT failure for the UE at the same time.

In a possible implementation manner, when the base station acts as a transmitter, the base station needs to perform LBT before sending the PDCCH channel carrying the CSI-RSs resources.

At this time, after the UE reports the beam failure event or the confirmation information of the beam failure event, within the preset second time threshold, if the aperiodic CSI-RSs resources configured by the base station cannot be received, one of the following three operations will be performed. Either some or all of:

Alt 1: Randomly roll back for a period of time, and resend the beam failure event or the confirmation information of the beam failure event;

Alt 2: Increase the transmit power and resend the beam failure event or the confirmation information of the beam failure event;

Alt 3: Return to the BFR process.

In addition, in order to ensure the reasonable coexistence of different access devices on the shared frequency band, the NRU system defines the concepts of Channel Occupancy Time (COT, Channel Occupancy Time) and Maximum Channel Occupancy Time (MCOT, Maximum Channel Occupancy Time), which represent the transmission The occupied time length of information transmission and the maximum allowable information transmission occupied time length of the machine under different LBT types. The COT length occupied by the transmitter to send signals is related to the priority of channel access, as shown in Table 1 below.

Table 1

For a system operating on a shared frequency band, the configuration assumptions for related measurement, reporting, and back-off time are as follows:

Define Y11, which represents the measurement time information and reporting information configured by the base station for the UE and the time corresponding to the time or number of times that the UE tolerates the failure of the UE to perform LBT;

For the case where the UE "backoffs randomly for a period of time", Y12 is defined, which represents the "backoff" time and Y11.

For the values of Y11 and Y12, one of the following two conditions is satisfied:

Alt1: less than MCOT length;

Alt2: Less than the remaining COT length.

For Alt2, the UE performs cyclic redundancy check (CRC, Cyclic Redundancy Check) scrambled DCI ( For example, DCI 2_0) information obtains the remaining COT information.

S503, the UE performs measurement on the designated BFD-RS and BFR-RS;

S504, the UE returns to the BFR process.

Wherein, for the implementation process of step S503 and step 504, reference may be made to the implementation process of step S102 and step S103 in the foregoing embodiment, and details are not repeated here.

The embodiment shown in FIG. 12 has at least the following improvements: the impact of LBT failure on the design and performance of the system is considered; the introduction of COT/MCOT limits the time domain behavior of the relevant base station and UE. Combined with the LBT mechanism, an aperiodic beam failure detection and candidate beam selection process is designed in line with the system operating in the shared frequency band.

In addition, the embodiment shown in FIG. 12 includes at least the following beneficial effects: adding aperiodic CSI-RSs for beam failure detection and candidate beam selection; the newly defined "SearchSpace1" is used to search for aperiodic CSI-RSs, Its corresponding CORESET provides the "spatial relation" reference of the relevant uplink channel; newly defined DCI field is used to trigger aperiodic CSI-RS for beam failure detection in the BFR process; the number of bits occupied by "CSI request" is increased, and the extra bits are used to indicate the aperiodic CSI-RS setting, the configuration information of the UE performing beam failure detection time and/or reporting time, indicating the relationship between CSI-RS and preamble/RO, and the time to tolerate the UE performing LBT failure; considering the impact of LBT failure on the system Design and performance implications. In addition, the introduction of COT/MCOT limits the time-domain behavior of the relevant base stations and UEs.

The embodiments of the present application are described above from the perspective of methods, and the following describes the communication devices in the embodiments of the present application from the perspective of specific device implementation.

Referring to FIG. 13 , an embodiment of the present application provides a communication device 1300 , where the communication device 1300 includes a transceiver unit 1301 and a processing unit 1302 ;

The transceiver unit 1301 is configured to send a first message to a terminal device in an aperiodic manner, where the first message includes the first reference signal, and the first reference signal includes a beam failure detection-reference signal BFD-RS and/or a beam failure recovery - reference signal BFR-RS;

The transceiver unit 1301 is further configured to receive the measurement result of the terminal device.

In a possible implementation manner, the first message includes a downlink control information DCI message;

In a possible implementation manner, the first message further includes first indication information, where the first indication information is used to indicate a beam direction in which the network device sends the DCI message.

In a possible implementation manner, the transceiver unit 1301 sends the first message to the terminal device through at least one of the following downlink channels, including:

In a possible implementation manner, the first message further includes a time parameter of the first reference signal, where the time parameter includes a time parameter for measurement and/or a time parameter for reporting a measurement result and/or a first duration threshold, wherein , the first duration threshold is used to indicate the duration for which the terminal device is allowed to perform listen-before-talk LBT.

In a possible implementation manner, the duration indicated by the time parameter is less than the maximum channel occupation time MCOT or the remaining channel occupation time COT.

In a possible implementation manner, the first message further includes the number of times of measurement of the first reference signal and/or the number of times the terminal device is allowed to perform the LBT.

In a possible implementation manner, before the transceiver unit 1301 sends the first message to the terminal device, the apparatus further includes a processing unit 1302;

the processing unit 1302, configured to determine that the number of non-acknowledgement information NACK from the terminal device is greater than a first threshold; and/or,

The processing unit 1302 is configured to have the number of times of failure of the listen-before-talk LBT greater than the second threshold.

In a possible implementation manner, when it is determined that the LBT is successful, the transceiver unit 1301 sends a first message to the terminal device.

In a possible implementation manner, the first message includes a control unit MAC CE for activating medium access control.

In a possible implementation manner, before the transceiver unit 1301 sends the first message to the terminal device, the transceiver unit 1301 is further configured to receive a first request message from the terminal device, where the first request message is used to request the first reference signal.

In a possible implementation manner, the transceiver unit 1301 receives the first request message from the terminal device through at least one of the following uplink channels, including:

The uplink channel corresponding to the secondary uplink SUL.

In a possible implementation manner, the at least one uplink channel is a physical uplink control channel PUCCH, a physical uplink shared channel PUSCH or a physical random access channel PRACH, and the reference signal RS indicated by the at least one uplink channel is associated with the The second search space corresponds to the RS indicated by the control resource set.

It should be noted that, for details such as the information execution process of the units of the communication device 1300, reference may be made to the descriptions in the method embodiments shown in the foregoing application, which will not be repeated here.

Referring to FIG. 14, an embodiment of the present application provides a communication apparatus 1400, including a transceiver unit 1401 and a processing unit 1402;

The transceiver unit 1401 is configured to receive a first message sent from a network device in an aperiodic manner, where the first message includes a first reference signal, and the first reference signal includes a beam failure detection-reference signal BFD-RS and/or beam failure recovery - reference signal BFR-RS;

The transceiver unit 1401 is further configured to acquire a measurement result according to the first reference signal and send the measurement result to the network device.

In a possible implementation manner, the transceiver unit 1401 receives the first message sent from the network device in an aperiodic manner through at least one of the following downlink channels, including:

In a possible implementation manner, the first message further includes a time parameter of the first reference signal, where the time parameter includes a time parameter for measurement and/or a time parameter for reporting a measurement result and/or a first duration threshold, wherein , the first duration threshold is used to indicate the duration of allowing the terminal device to perform listen-before-talk LBT.

In a possible implementation manner, before the transceiver unit 1401 receives the first message from the network device, the transceiver unit 1401 is further configured to send a first request message to the network device, where the first request message is used to request the first reference signal.

In a possible implementation manner, the apparatus further includes a processing unit 1402, and when at least one of the following conditions is satisfied, the transceiver unit 1401 sends a first request message to the network device, including:

When the processing unit 1402 determines that the demodulation target downlink message fails in the first time period, the target downlink message is carried on the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH between the network equipment and the terminal equipment;

or,

The processing unit 1402 determines in the second time period when the number of failures of the listen-before-talk LBT is greater than a preset threshold.

In a possible implementation manner, the transceiver unit 1401 sends the first request message to the network device through at least one of the following uplink channels, including:

The uplink channel indicated by the control resource set associated with the second search space, where the second search space is configured in the periodically configured beam failure recovery parameter; or,

The uplink channel corresponding to the secondary uplink SUL.

In a possible implementation manner, the at least one uplink channel is a physical uplink control channel PUCCH, a physical uplink shared channel PUSCH or a physical random access channel PRACH, and the reference signal RS indicated by the at least one uplink channel is associated with The second search space corresponds to the RS indicated by the control resource set.

It should be noted that, for details such as the information execution process of the units of the communication device 1400, reference may be made to the descriptions in the method embodiments shown in the foregoing application, and details are not repeated here.

Please refer to FIG. 15 , which is a schematic structural diagram of the communication device involved in the above-mentioned embodiment provided for the embodiment of the present application, wherein the communication device may specifically be the network device in the foregoing embodiment, and the structure of the communication device may refer to FIG. 15 shows the structure.

The communication device includes at least one processor 1511 , at least one memory 1512 , at least one transceiver 1513 , at least one network interface 1514 and one or more antennas 1515 . The processor 1511, the memory 1512, the transceiver 1513 and the network interface 1514 are connected, for example, through a bus. In this embodiment of the present application, the connection may include various interfaces, transmission lines, or buses, which are not limited in this embodiment. . The antenna 1515 is connected to the transceiver 1513 . The network interface 1514 is used to connect the communication device with other communication devices through a communication link. For example, the network interface 1514 may include a network interface between the communication device and the core network device, such as an S1 interface, and the network interface may include the communication device and other networks. A network interface between devices (such as other access network devices or core network devices), such as an X2 or Xn interface.

The processor 1511 is mainly used to process communication protocols and communication data, control the entire communication device, execute software programs, and process data of software programs, for example, to support the communication device to perform the actions described in the embodiments. The communication device may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data. The central processing unit is mainly used to control the entire terminal equipment, execute software programs, and process data of software programs. . The processor 1511 in FIG. 15 may integrate the functions of a baseband processor and a central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit may also be independent processors, interconnected by technologies such as a bus. Those skilled in the art can understand that a terminal device may include multiple baseband processors to adapt to different network standards, a terminal device may include multiple central processors to enhance its processing capability, and various components of the terminal device may be connected through various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit may also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and communication data can be built into the processor or stored in the memory in the form of a software program, and the processor executes the software program to realize the baseband processing function.

The memory is mainly used to store software programs and data. The memory 1512 may exist independently and be connected to the processor 1511 . Optionally, the memory 1512 can be integrated with the processor 1511, for example, in one chip. The memory 1512 can store program codes for implementing the technical solutions of the embodiments of the present application, and is controlled and executed by the processor 1511 .

Figure 15 shows only one memory and one processor. In an actual terminal device, there may be multiple processors and multiple memories. The memory may also be referred to as a storage medium or a storage device or the like. The memory may be a storage element on the same chip as the processor, that is, an on-chip storage element, or an independent storage element, which is not limited in this embodiment of the present application.

The transceiver 1513 can be used to support the reception or transmission of radio frequency signals between the communication device and the terminal, and the transceiver 1513 can be connected to the antenna 1515 . The transceiver 1513 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 1515 can receive radio frequency signals, and the receiver Rx of the transceiver 1513 is used to receive the radio frequency signals from the antennas, convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, and convert the digital The baseband signal or digital intermediate frequency signal is provided to the processor 1511, so that the processor 1511 performs further processing on the digital baseband signal or digital intermediate frequency signal, such as demodulation processing and decoding processing. In addition, the transmitter Tx in the transceiver 1513 is also used to receive the modulated digital baseband signal or digital intermediate frequency signal from the processor 1511, and convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and pass a The radio frequency signal is transmitted by the antenna or antennas 1515. Specifically, the receiver Rx can selectively perform one or more stages of down-mixing processing and analog-to-digital conversion processing on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency signal. The order of precedence is adjustable. The transmitter Tx can selectively perform one or more stages of up-mixing processing and digital-to-analog conversion processing on the modulated digital baseband signal or digital intermediate frequency signal to obtain a radio frequency signal, and the up-mixing processing and digital-to-analog conversion processing The order of s is adjustable. Digital baseband signals and digital intermediate frequency signals can be collectively referred to as digital signals.

A transceiver may also be referred to as a transceiver unit, a transceiver, a transceiver, or the like. Optionally, the device used to implement the receiving function in the transceiver unit may be regarded as a receiving unit, and the device used to implement the transmitting function in the transceiver unit may be regarded as a transmitting unit, that is, the transceiver unit includes a receiving unit and a transmitting unit, and the receiving unit also It can be called a receiver, an input port, a receiving circuit, etc., and the sending unit can be called a transmitter, a transmitter, or a transmitting circuit, etc.

It should be noted that the communication device shown in FIG. 15 can be specifically used to implement the steps implemented by the access network equipment in the method embodiments corresponding to FIG. 5 to FIG. 13 , and realize the technical effect corresponding to the access network equipment, as shown in FIG. 15 . For the specific implementation manner of the communication apparatus, reference may be made to the descriptions in the respective method embodiments corresponding to FIG. 5 to FIG. 13 , which will not be repeated here.

Please refer to FIG. 16 , which is a schematic diagram of a possible logical structure of the communication apparatus 1600 involved in the above-mentioned embodiments provided by the embodiments of the present application. The communication apparatus may specifically be the terminal equipment in the foregoing embodiments. It may include, but is not limited to, a processor 1601 , a communication port 1602 , a memory 1603 , and a bus 1604 . In this embodiment of the present application, the processor 1601 is used to control and process the actions of the communication device 1600 .

Furthermore, the processor 1601 may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure. The processor may also be a combination that implements computing functions, such as a combination comprising one or more microprocessors, a combination of a digital signal processor and a microprocessor, and the like. Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above may refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

It should be noted that the communication apparatus shown in FIG. 16 can be specifically used to implement the steps implemented by the terminal equipment in the method embodiments corresponding to FIG. 5 to FIG. 13 , and realize the technical effects corresponding to the terminal equipment. For the implementation manner, reference may be made to the descriptions in the respective method embodiments corresponding to FIG. 5 to FIG. 13 , which will not be repeated here.

Embodiments of the present application further provide a computer-readable storage medium that stores one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the possible implementations of the communication device in the foregoing embodiments. method, wherein the communication device may specifically be the network device in the foregoing embodiment.

Embodiments of the present application further provide a computer-readable storage medium that stores one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the possible implementations of the communication device in the foregoing embodiments. method, wherein the communication device may specifically be the terminal device in the foregoing embodiment.

Embodiments of the present application also provide a computer program product (or computer program) that stores one or more computers. When the computer program product is executed by the processor, the processor executes the method for possible implementations of the above communication device, wherein , the communication apparatus may specifically be the network device in the foregoing embodiment.

Embodiments of the present application further provide a computer program product that stores one or more computers. When the computer program product is executed by the processor, the processor executes the method for possible implementations of the above communication device, wherein the communication device may specifically be is the terminal device in the foregoing embodiment.

An embodiment of the present application further provides a chip system, where the chip system includes a processor, which is configured to support the communication apparatus to implement the functions involved in the possible implementation manners of the foregoing communication apparatus. In a possible design, the chip system may further include a memory for storing necessary program instructions and data of the communication device. The chip system may be constituted by a chip, or may include a chip and other discrete devices, wherein the communication device may specifically be the network device in the foregoing embodiment.

An embodiment of the present application further provides a chip system, where the chip system includes a processor, which is configured to support the communication apparatus to implement the functions involved in the possible implementation manners of the foregoing communication apparatus. In a possible design, the chip system may further include a memory for storing necessary program instructions and data of the communication device. The chip system may be composed of chips, or may include chips and other discrete devices, wherein the communication device may specifically be the terminal equipment in the foregoing embodiments.

An embodiment of the present application further provides a network system architecture, where the network system architecture includes the foregoing communication apparatus, and the communication apparatus may specifically be the terminal equipment and the network equipment in the foregoing embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

Claims

A communication method, comprising:

The network device sends a first message to the terminal device in an aperiodic manner, where the first message includes the first reference signal, and the first reference signal includes beam failure detection-reference signal BFD-RS and/or beam failure recovery - reference signal BFR-RS;

The network device receives the measurement result of the terminal device.
The method according to claim 1, wherein the network device sends the first message to the terminal device through at least one of the following downlink channels, comprising:

Corresponding to the downlink channel indicated by the control resource set corresponding to the first search space, where the first search space is used to search for aperiodic channel system information-reference signal CSI-RS; or,

The downlink channel indicated by the control resource set associated with the second search space, wherein the second search space is configured in the periodically configured beam failure detection and/or beam failure recovery parameters.
The method according to claim 1 or 2, wherein before the network device sends the first message to the terminal device, the method further comprises:

The network device determines that the number of non-acknowledgement information NACK from the terminal device is greater than a first threshold; and/or,

The network device determines that the number of failures of the listen-before-talk LBT is greater than the second threshold.
The method according to any one of claims 1 to 3, wherein when the network device determines that the LBT is successful, the network device sends the first message to the terminal device.
A communication method, comprising:

The terminal device receives a first message sent from a network device in an aperiodic manner, the first message includes a first reference signal, and the first reference signal includes a beam failure detection-reference signal BFD-RS and/or beam failure recovery - reference signal BFR-RS;

The terminal device acquires a measurement result according to the first reference signal and sends the measurement result to the network device.
The method according to any one of claims 1 to 5, wherein the first message comprises a downlink control information DCI message;

The first reference signal is carried in the channel system information request CSI request field in the DCI message; and/or,

The first reference signal is carried in the beamforming detection BF detection field used for beam failure detection in the DCI message; and/or,

The first reference signal is carried in the candidate beamforming detection Candidate BF Detection field used for candidate beam selection and/or beam failure detection in the DCI message.
The method according to claim 6, wherein the first message further includes first indication information, wherein the first indication information is used to indicate a beam direction of the network device to send the DCI message.
The method according to any one of claims 5 to 7, wherein the terminal device receives the first message sent by the network device in an aperiodic manner through at least one of the following downlink channels, including:

Corresponding to the downlink channel indicated by the control resource set corresponding to the first search space, where the first search space is used to search for aperiodic channel system information-reference signal CSI-RS; or,

The downlink channel indicated by the control resource set associated with the second search space, wherein the second search space is configured in the periodically configured beam failure detection and/or beam failure recovery parameters.
The method according to any one of claims 1 to 8, wherein the first message further includes a time parameter of the first reference signal, and the time parameter includes a measured time parameter and/or a reported measurement result The time parameter and/or the first duration threshold, wherein the first duration threshold is used to indicate the duration for which the terminal device is allowed to perform the listen-before-talk LBT.
The method according to claim 9, wherein the duration indicated by the time parameter is less than the maximum channel occupation time MCOT or the remaining channel occupation time COT.
The method according to any one of claims 1 to 10, wherein the first message further includes the number of times of measurement of the first reference signal and/or the number of times the terminal device is allowed to perform the LBT.
The method according to any one of claims 5 to 11, wherein before the terminal device receives the first message from the network device, the method further comprises:

The terminal device sends a first request message to the network device, where the first request message is used to request the first reference signal.
The method according to claim 12, wherein when at least one of the following conditions is satisfied, the terminal device sends a first request message to the network device, comprising:

When the terminal device determines that the demodulation of the target downlink message fails within the first time period, the target downlink message is carried on the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH between the network device and the terminal device;

or,

When the terminal device determines within the second time period that the number of times of failure of the listen-before-talk LBT is greater than a preset threshold.
The method according to claim 12 or 13, wherein the terminal device sends the first request message to the network device through at least one of the following uplink channels, comprising:

is associated with the uplink channel indicated by the control resource set corresponding to the first search space, wherein the first search space is used to search for aperiodic CSI-RS; or,

The uplink channel indicated by the control resource set associated with the second search space, wherein the second search space is configured in the periodically configured beam failure detection and/or beam failure recovery parameters; or,

The uplink channel corresponding to the secondary uplink SUL.
The method according to claim 14, wherein the at least one uplink channel is a physical uplink control channel PUCCH, a physical uplink shared channel PUSCH or a physical random access channel PRACH, and the at least one uplink channel indicates The reference signal RS of is associated with the RS indicated by the control resource set corresponding to the second search space.
The method according to any one of claims 1 to 15, wherein the first message includes a control unit MAC CE for activating medium access control.
A communication device, characterized in that it includes a transceiver unit:

The transceiver unit is configured to send a first message to the terminal device in an aperiodic manner, where the first message includes the first reference signal, and the first reference signal includes a beam failure detection-reference signal BFD-RS and/or beam failure recovery - reference signal BFR-RS;

The transceiver unit is further configured to receive the measurement result of the terminal device.
The apparatus according to claim 17, wherein the transceiver unit sends the first message to the terminal device through at least one of the following downlink channels, comprising:

Corresponding to the downlink channel indicated by the control resource set corresponding to the first search space, where the first search space is used to search for aperiodic channel system information-reference signal CSI-RS; or,

The downlink channel indicated by the control resource set associated with the second search space, wherein the second search space is configured in the periodically configured beam failure detection and/or beam failure recovery parameters.
The apparatus according to claim 17 or 18, wherein before the transceiver unit sends the first message to the terminal device, the apparatus further comprises a processing unit;

the processing unit, configured to determine that the number of non-acknowledgement information NACK from the terminal device is greater than a first threshold; and/or,

The processing unit is used for the number of failures of the listen-before-talk LBT greater than the second threshold.
The apparatus according to any one of claims 17 to 19, wherein when it is determined that the LBT is successful, the transceiver unit sends a first message to the terminal device.
A communication device, comprising a transceiver unit;

The transceiver unit is configured to receive a first message sent from a network device in an aperiodic manner, where the first message includes a first reference signal, and the first reference signal includes a beam failure detection-reference signal BFD-RS and / or beam failure recovery - reference signal BFR-RS;

The transceiver unit is further configured to acquire a measurement result according to the first reference signal and send the measurement result to the network device.
The apparatus according to any one of claims 17 to 21, wherein the first message comprises a downlink control information DCI message;

The first reference signal is carried in the channel system information request CSI request field in the DCI message; and/or,

The first reference signal is carried in the beamforming detection BF detection field used for beam failure detection in the DCI message; and/or,

The first reference signal is carried in the candidate beamforming detection Candidate BF Detection field used for candidate beam selection and/or beam failure detection in the DCI message.
The apparatus according to claim 22, wherein the first message further comprises first indication information, wherein the first indication information is used to instruct the network device to use a beam direction for sending the DCI message.
The apparatus according to any one of claims 21 to 23, wherein the transceiver unit receives, through at least one of the following downlink channels, the first message sent from the network device in an aperiodic manner, including:

Corresponding to the downlink channel indicated by the control resource set corresponding to the first search space, where the first search space is used to search for aperiodic channel system information-reference signal CSI-RS; or,

The downlink channel indicated by the control resource set associated with the second search space, wherein the second search space is configured in the periodically configured beam failure detection and/or beam failure recovery parameters.
The apparatus according to any one of claims 17 to 24, wherein the first message further includes a time parameter of the first reference signal, and the time parameter includes a measured time parameter and/or a reported measurement result The time parameter and/or the first duration threshold, where the first duration threshold is used to indicate the duration for which the terminal device is allowed to perform the listen-before-talk LBT.
The apparatus according to claim 25, wherein the duration indicated by the time parameter is less than the maximum channel occupation time MCOT or the remaining channel occupation time COT.
The apparatus according to any one of claims 17 to 26, wherein the first message further includes the number of times of measurement of the first reference signal and/or the number of times the terminal device is allowed to perform the LBT.
The apparatus according to any one of claims 21 to 27, wherein before the transceiver unit receives the first message from the network device, the transceiver unit is further configured to send a first request to the network device message, the first request message is used to request the first reference signal.
The device according to claim 28, wherein the device further comprises a processing unit, and when at least one of the following conditions is satisfied, the transceiver unit sends a first request message to the network device, including:

When the processing unit determines within the first time period that the demodulation of the target downlink message fails, the target downlink message is carried on the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH between the network device and the terminal device;

or,

The processing unit determines in the second time period when the number of times of failure of the listen-before-talk LBT is greater than a preset threshold.
The device according to claim 28 or 29, wherein the transceiver unit sends the first request message to the network device through at least one of the following uplink channels, including:

is associated with the uplink channel indicated by the corresponding control resource set in the first search space, where the first search space is used to search for aperiodic CSI-RS; or,

The uplink channel indicated by the control resource set associated with the second search space, wherein the second search space is configured in the periodically configured beam failure detection and/or beam failure recovery parameters; or,

The uplink channel corresponding to the secondary uplink SUL.
The apparatus according to claim 30, wherein the at least one uplink channel is a physical uplink control channel PUCCH, a physical uplink shared channel PUSCH or a physical random access channel PRACH, and the at least one uplink channel indicates The reference signal RS of is associated with the RS indicated by the control resource set corresponding to the second search space.
The apparatus according to any one of claims 17 to 31, wherein the first message includes a control unit MAC CE for activating medium access control.
A computer program product, the computer program product comprising a computer program or instructions, characterized in that, when the computer program product is run on a computer, the computer is caused to perform the execution of any one of claims 1 to 4. method, or cause the computer to perform the method according to any one of claims 5 to 16.