Communication method and communication apparatus

Abstract

Provided in the present application are a communication method and a communication apparatus. The method comprises: after a beam failure occurs in a terminal device, the terminal device determining a first reference signal, wherein the first reference signal is a reference signal corresponding to a new beam after beam failure recovery of the terminal device, and the first reference signal is a reference signal included in first beam indication information; and the terminal device determining a first timing advance (TA), wherein the first TA is a TA corresponding to the first beam indication information, and the first TA is used for performing uplink transmission after the beam failure recovery of the terminal device. By means of the method, a TA for performing uplink transmission can be determined before a terminal device receives new beam indication information.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on September 28, 2023, with application number 202311290120.5 and application name “Communication Method and Communication Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and in particular, to a communication method and a communication device. Background Art

[0003] The network device transmits beam indication information to indicate to the terminal device the relevant information of the transmission beam. The network device can configure the beam indication information to be associated with one of multiple timing advances (TAs). When the network device instructs the terminal device which beam indication information to use for uplink transmission, the terminal device uses the TA associated with the beam indication information for uplink transmission.

[0004] When a beam failure occurs in the terminal device, the terminal device can determine a new beam. Before the terminal device receives the new beam indication information, the terminal device can perform uplink and downlink transmission through the reference signal (RS) of the new beam. However, the RS is not associated with the TA, so before the terminal device receives the new beam indication information, it cannot be determined which TA to use for uplink transmission.

[0005] Summary of the Invention

[0006] The present application provides a communication method and a communication device for determining a TA for uplink transmission before a terminal device receives new beam indication information.

[0007] In a first aspect, a communication method is provided. The method may be executed by a terminal device, or may be executed by a component of the terminal device (such as a chip or circuit), without limitation. For ease of description, the following description is based on an example of execution by a terminal device.

[0008] The method may include: when a beam failure occurs in the terminal device, the terminal device determines a first reference signal, the first reference signal is a reference signal corresponding to a new beam after the terminal device recovers from the beam failure, and the first reference signal is a reference signal included in the first beam indication information; the terminal device determines a first TA, the first TA is the TA corresponding to the first beam indication information, and the first TA is used for uplink transmission after the terminal device recovers from the beam failure.

[0009] Based on the above technical solution, a new beam adopted by the terminal device after the beam failure is recovered is determined, the reference signal corresponding to the new beam is the reference signal included in the first beam indication information, and the TA corresponding to the first beam indication information is determined to be the TA for uplink transmission, so that the terminal device can determine the TA for uplink transmission before receiving the new beam indication information.

[0010] Beam failure in a terminal device can be understood as follows: when the network device is configured with a beam failure detection set q0, the terminal device measures the reference signal of the beam failure detection set. If the measurement quality of the reference signal in the set is lower than the preset threshold for N consecutive times, the terminal device is considered to have a beam failure. The value of N and the preset threshold are the default values ​​specified by the network device configuration or protocol.

[0011] Beam failure of the terminal device can also be understood as: when the network device is configured with multiple beam failure detection sets, the terminal device measures the reference signals of multiple beam failure detection sets. If the measurement quality of the reference signal in one of the beam failure detection sets is lower than the preset threshold for N consecutive times, then it is considered that a beam failure has occurred in the beam failure detection set. The value of N and the preset threshold are the default values ​​specified by the network device configuration or protocol.

[0012] Beam failure of the terminal device can also be understood as: when the network device is not configured with a beam failure detection set, the terminal device will use the periodic channel state information reference signal CSI-RS in the transmission configuration indication state TCI state of the control resource set CORESET corresponding to the physical downlink control channel PDCCH to monitor the beam failure detection set q0. If the measurement quality of the reference signal in the set is lower than the preset threshold for N consecutive times, it is considered that a beam failure has occurred in the terminal device. The value of N and the preset threshold are the default values ​​specified by the network device configuration or protocol.

[0013] Beam failure occurs in the terminal device, which can also be understood as: when the network device is not configured with a beam failure detection set, the terminal device will use the periodic CSI-RS in the TCI state of multiple CORESETs corresponding to the PDCCH to monitor the PDCCH to determine them as multiple beam failure detection sets. If the measurement quality of the reference signal in one of the beam failure detection sets is lower than the preset threshold for N consecutive times, it is considered that a beam failure occurs in the beam failure detection set, and the N and the preset threshold are the default values ​​specified by the network device configuration or protocol.

[0014] In this application, the beam indication information can be any one of TCI state, spatial relation, uplink transmission configuration indication state UL TCI state, common transmission configuration indication state joint TCI state, and downlink transmission configuration indication state DL TCI state, and this application does not limit this.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the terminal device determines a first TA based on a first association relationship, where the first association relationship is an association relationship between at least one beam indication information and a TA, and the at least one beam indication information includes the first beam indication information.

[0016] In a possible implementation, the method further includes: the terminal device receives configuration information of at least one beam indication information, the beam indication information includes one or more reference signals, and the at least one beam indication information includes first beam indication information.

[0017] In a possible implementation, the first association relationship is configured by a network device.

[0018] In one possible implementation, the method also includes: each beam indication information in the at least one beam indication information corresponds to its own first identification index, the at least one beam indication information includes N beam indication information, each beam indication information in the N beam indication information includes a first reference signal, the first beam indication information is the beam indication information with the largest or smallest first identification index among the N beam indication information, and N is a positive integer.

[0019] In a second aspect, a communication method is provided. The method may be executed by a terminal device, or may be executed by a component of the terminal device (such as a chip or circuit), without limitation. For ease of description, the following description is based on an example of execution by a terminal device.

[0020] The method may include: the terminal device sends non-competition-based random access request information for beam failure recovery, the terminal device receives beam recovery success response information, the beam recovery success response information includes first indication information, the first indication information is used to indicate the first TA, the first TA is used for uplink transmission after the terminal device beam failure is recovered, and the beam recovery success response information is carried in the PDCCH associated with the recovery search space set; or, the terminal device sends contention-based random access request information for beam failure recovery, the terminal device receives random access response information, the random access response information includes first indication information, the first indication information is used to indicate the first TA, and the first TA is used for uplink transmission after the terminal device beam failure is recovered.

[0021] Based on the above technical solution, during the process of beam failure recovery by the terminal device, the message sent by the network device to the terminal device carries a first TA, which is the TA for uplink transmission after the beam failure recovery, so that the terminal device can determine the TA for uplink transmission before receiving new beam indication information.

[0022] Determine the new beam adopted by the terminal device after the beam failure is recovered, the reference signal corresponding to the new beam is the reference signal included in the first beam indication information, and determine that the TA corresponding to the first beam indication information is the TA for uplink transmission.

[0023] In a possible implementation, after the terminal device receives the random access response information, the terminal device sends third information, where the third information is used to carry the identity of the terminal device; the terminal device receives contention resolution information, where the contention resolution information includes the first indication information.

[0024] In a third aspect, a communication method is provided. The method may be executed by a terminal device, or may be executed by a component of the terminal device (e.g., a chip or circuit), without limitation. For ease of description, the following description is based on an example of execution by a terminal device.

[0025] The method may include: at least one reference signal in a first beam failure detection reference signal set of a terminal device has a beam failure, the first beam failure detection reference signal set corresponds to a first control resource set pool index CORESETpoolindex, the first control resource set pool index corresponds to second beam indication information, and the second beam indication information is used by the terminal device to monitor the physical downlink control channel PDCCH associated with the first CORESETpoolindex before the beam failure; the terminal device determines a first TA, the first TA is the TA corresponding to the second beam indication information, and the first TA is used for uplink transmission after the beam failure of the terminal device is recovered.

[0026] Based on the above technical solution, the PDCCH used by the terminal device before the beam failure is determined, and the beam indication information corresponding to the PDCCH is determined, and the TA corresponding to the beam indication information is determined to be the TA for uplink transmission after the beam failure is recovered.

[0027] In a fourth aspect, a communication method is provided. The method can be executed by a terminal device, or can also be executed by a component of the terminal device (such as a chip or circuit), without limitation. For ease of description, the following description is based on the example of execution by a terminal device.

[0028] The method may include: a terminal device experiences a beam failure, determines a first reference signal, the first reference signal belongs to a first candidate beam reference signal set, and the terminal device determines a first TA, which is a TA corresponding to the first reference signal.

[0029] Based on the above technical solution, the reference signal corresponding to the new beam after the terminal device beam failure is recovered is determined, and the TA corresponding to the reference signal is determined as the TA for uplink transmission after the beam failure is recovered.

[0030] In a possible implementation, the terminal device determines the first TA according to the second association relationship, where the second association relationship is an association relationship between at least one reference signal in the first candidate beam reference signal set and the TA.

[0031] In a possible implementation, the second association relationship is configured by a network device.

[0032] In a fifth aspect, a communication method is provided, which can be executed by a terminal device, or can also be executed by a component of the terminal device (such as a chip or circuit), without limitation. For ease of description, the following description is based on the example of execution by a terminal device.

[0033] The method may include: at least one reference signal in a first beam failure detection reference signal set of a terminal device has a beam failure, and the terminal device determines a first TA, where the first TA is a TA corresponding to the first beam failure detection reference signal set.

[0034] Based on the above technical solution, a beam failure detection reference signal set is determined when a beam failure occurs in the terminal device, and the TA corresponding to the beam failure detection reference signal set is determined as the TA for uplink transmission after the beam failure is recovered.

[0035] In a possible implementation, the terminal device determines the first TA based on a third association relationship, where the third association relationship is an association relationship between at least one beam failure detection reference signal set and the TA.

[0036] In a possible implementation, the third association relationship is configured by a network device.

[0037] In a sixth aspect, a communication method is provided, which can be executed by a terminal device, or can also be executed by a component of the terminal device (such as a chip or circuit), without limitation. For ease of description, the following description is based on the example of execution by a terminal device.

[0038] The method may include: a terminal device experiences a beam failure, determines a first reference signal, the first reference signal belongs to a first candidate beam reference signal set, the terminal device determines a first TA, and the first TA is a TA corresponding to the first candidate beam reference signal set.

[0039] Based on the above technical solution, a new beam is determined after the terminal device beam failure is recovered. The new beam belongs to the first candidate beam reference signal set, and the TA corresponding to the first candidate beam reference signal set is determined as the TA for uplink transmission after the beam failure is recovered.

[0040] In a possible implementation, the terminal device determines the first TA according to a fourth association relationship, where the fourth association relationship is an association relationship between at least one candidate beam reference signal set and the TA.

[0041] In a possible implementation, the fourth association relationship is configured by a network device.

[0042] In a seventh aspect, a communication method is provided, which can be executed by a terminal device, or can also be executed by a component of the terminal device (such as a chip or circuit), without limitation. For ease of description, the following description is based on an example of execution by a terminal device.

[0043] The method may include: at least one reference signal in a first beam failure detection reference signal set of a terminal device undergoes a beam failure, the first beam failure detection reference signal set corresponds to a first candidate beam reference signal set, and the terminal device determines a first TA, which is the TA corresponding to the first candidate beam reference signal set.

[0044] Based on the above technical solution, the beam failure detection reference signal set of the terminal device where the beam failure occurs is determined, and the candidate beam reference signal set corresponding to the beam failure detection reference signal set is determined, and the TA corresponding to the candidate beam reference signal set is determined as the TA for uplink transmission after the beam failure is recovered.

[0045] In one possible implementation, the terminal device determines the first TA based on the fourth association relationship and the fifth association relationship, the fourth association relationship is the association relationship between at least one candidate beam reference signal set and the TA, and the fifth association relationship is the correspondence between the beam failure detection reference signal set and the candidate beam reference signal set.

[0046] In a possible implementation, the fourth association relationship and the fifth association relationship are configured by a network device.

[0047] In an eighth aspect, a communication method is provided, which can be executed by a terminal device, or can also be executed by a component of the terminal device (such as a chip or circuit), without limitation. For ease of description, the following description is based on the example of execution by a terminal device.

[0048] The method may include: when a beam failure occurs in the terminal device, determining a first reference signal, the first reference signal belongs to a first candidate beam reference signal set, the first candidate beam reference signal set corresponds to a first beam failure detection reference signal set, and the terminal device determines a first TA, which is the TA corresponding to the first beam failure detection reference signal set.

[0049] Based on the above technical solution, when a beam failure occurs in the terminal device, a first reference signal is determined, the first reference signal belongs to a first candidate beam reference signal set, the first candidate beam reference signal set corresponds to a first beam failure detection reference signal set, and the TA corresponding to the first beam failure detection reference signal set is determined to be the TA for uplink transmission after the beam failure is recovered.

[0050] In one possible implementation, the terminal device determines the first TA based on the third association relationship and the fifth association relationship, the third association relationship is the association relationship between at least one beam failure detection reference signal set and the TA, and the fifth association relationship is the correspondence between the beam failure detection reference signal set and the candidate beam reference signal set.

[0051] In a possible implementation, the third association relationship and the fifth association relationship are configured by a network device.

[0052] In a ninth aspect, a communication method is provided, which can be executed by a terminal device, or can also be executed by a component of the terminal device (such as a chip or circuit), without limitation. For ease of description, the following description is based on an example of execution by a terminal device.

[0053] The method may include: the terminal device determines a first TA, the first TA is the TA corresponding to the third beam indication information, and the third beam indication information is the beam indication information used for uplink transmission before the beam failure occurs in the terminal device.

[0054] Based on the above technical solution, the beam indication information used by the terminal device before the beam failure is determined, and the TA corresponding to the beam indication information is determined to be the TA for uplink transmission after the beam failure is recovered.

[0055] In a tenth aspect, a communication method is provided, which can be executed by a network device, or can also be executed by a component of the network device (such as a chip or circuit), without limitation. For ease of description, the following description is based on an example of execution by a network device.

[0056] The method may include: the network device receives non-competition-based random access request information for beam failure recovery, the network device sends beam recovery success response information, the beam recovery success response information includes first indication information, the first indication information is used to indicate the first TA, and the first TA is used for uplink transmission after the terminal device beam failure is recovered, and the beam recovery success response information is carried in the PDCCH associated with the recovery search space set; or, the network device receives contention-based random access request information for beam failure recovery, the network device sends random access response information, the random access response information includes first indication information, the first indication information is used to indicate the first TA, and the first TA is used for uplink transmission after the terminal device beam failure is recovered.

[0057] Based on the above technical solution, during the process of beam failure recovery by the terminal device, the message sent by the network device to the terminal device carries a first TA, which is the TA for uplink transmission after the beam failure recovery, so that the terminal device can determine the TA for uplink transmission before receiving new beam indication information.

[0058] In a possible implementation, after the network device sends the random access response information, the network device receives and sends third information, where the third information is used to carry the identity of the terminal device; the network device sends contention resolution information, where the contention resolution information includes the first indication information.

[0059] In any one of the first to tenth aspects, and any possible implementation of the above aspects, the first TA is used for uplink transmission in a first time period, and the starting moment of the first time period is the first moment, which is any one of the following moments: the moment after the first duration of successful beam failure recovery of the terminal device; the moment after the second duration of receiving the beam recovery success response information of the terminal device; the moment after the third duration of receiving the contention resolution message when the terminal device performs beam failure recovery based on contention-based random access; the moment 28 symbols after the last symbol in the first physical downlink control channel PDCCH received by the terminal device in the recovery space search set; the moment after the fifth duration of sending the first beam failure recovery media access control unit BFR MAC CE by the terminal device; the moment 28 symbols after the terminal device receives the last symbol in the first PDCCH, the first PDCCH and the downlink control information DCI format for scheduling the first physical uplink shared channel PUSCH have the same automatic hybrid repeat request HARQ process and the NDI field is flipped.

[0060] In one possible implementation, the end moment of the first time period is the second moment, and the second moment is any one of the following moments: the moment after the fourth time period after the terminal device receives the DCI signaling for indicating the new beam indication information; the moment after the fifth time period after the terminal device sends the first positive confirmation ACK feedback information, and the first ACK feedback information is used to indicate that the terminal has successfully received the DCI signaling for indicating the new beam indication information; the moment after the seventh time period after the terminal device receives the media access control unit MAC CE signaling for activating the beam indication information; the moment after the eighth time period after the terminal device sends the second ACK feedback information, and the second ACK feedback information is used to indicate that the terminal has successfully received the MAC CE signaling for activating the beam indication information.

[0061] In the eleventh aspect, a communication device is provided, including: a processing unit, used to determine a first reference signal, the first reference signal is a reference signal corresponding to a new beam after the device beam failure is recovered, and the first reference signal is a reference signal included in the first beam indication information; the processing unit is also used to determine a first TA, the first TA is the TA corresponding to the first beam indication information, and the first TA is used for uplink transmission after the device beam failure is recovered.

[0062] In a possible implementation, the processing unit is further used to determine a first TA based on a first association relationship, where the first association relationship is an association relationship between at least one beam indication information and a TA, and the at least one beam indication information includes the first beam indication information.

[0063] In a possible implementation, the device further includes: a receiving unit, configured to receive configuration information of at least one beam indication information, where the beam indication information includes one or more reference signals, and the at least one beam indication information includes first beam indication information.

[0064] In a possible implementation, the first association relationship is configured by a network device.

[0065] In one possible implementation, each beam indication information in at least one beam indication information corresponds to its own first identification index, and at least one beam indication information includes N beam indication information, each beam indication information in the N beam indication information includes a first reference signal, and the first beam indication information is the beam indication information with the largest or smallest first identification index among the N beam indication information, and N is a positive integer.

[0066] In the twelfth aspect, a communication device is provided, including: a sending unit for sending non-competition-based random access request information for beam failure recovery; a receiving unit for receiving beam recovery success response information, the beam recovery success response information including first indication information, the first indication information being used to indicate a first TA, the first TA being used for uplink transmission after the beam failure of the terminal device is recovered, the beam recovery success response information being carried in the PDCCH associated with the recovery search space set; the sending unit is also used to send contention-based random access request information for beam failure recovery, the receiving unit is also used to receive random access response information, the random access response information including first indication information, the first indication information being used to indicate a first TA, the first TA being used for uplink transmission after the device beam failure is recovered.

[0067] In a possible implementation, the sending unit is further configured to send third information, where the third information is used to carry the identity of the terminal device; and the receiving unit is further configured to receive contention resolution information, where the contention resolution information includes the first indication information.

[0068] In the thirteenth aspect, a communication device is provided, including: a processing unit, used to determine a first TA, the first TA is the TA corresponding to the second beam indication information, and the first TA is used for uplink transmission after the terminal device recovers from beam failure; at least one reference signal in the first beam failure detection reference signal set of the device has a beam failure, the first beam failure detection reference signal set corresponds to the first control resource set pool index CORESETpoolindex, the first control resource set pool index corresponds to the second beam indication information, and the second beam indication information is used by the device to monitor the physical downlink control channel PDCCH associated with the first CORESETpoolindex before the beam failure.

[0069] In a fourteenth aspect, a wireless communication device is provided, comprising modules or units for executing the method in the first aspect or any possible implementation of the first aspect.

[0070] In a fifteenth aspect, a wireless communication device is provided, comprising modules or units for executing the method in the second aspect or any possible implementation of the second aspect.

[0071] In the sixteenth aspect, a wireless communication device is provided, comprising modules or units for executing the method in the third aspect or any possible implementation of the third aspect.

[0072] In the seventeenth aspect, a wireless communication device is provided, comprising modules or units for executing the method in the fourth aspect or any possible implementation of the fourth aspect.

[0073] In the eighteenth aspect, a wireless communication device is provided, comprising modules or units for executing the method in the fifth aspect or any possible implementation of the fifth aspect.

[0074] In the nineteenth aspect, a wireless communication device is provided, comprising modules or units for executing the method in the sixth aspect or any possible implementation of the sixth aspect.

[0075] In the twentieth aspect, a wireless communication device is provided, comprising modules or units for executing the method in the seventh aspect or any possible implementation of the seventh aspect.

[0076] In aspect 21, a wireless communication device is provided, comprising modules or units for executing the method in aspect 8 or any possible implementation of aspect 8.

[0077] In aspect 22, a wireless communication device is provided, comprising modules or units for executing the method in aspect 9 or any possible implementation of aspect 9.

[0078] In aspect twenty-third, a wireless communication device is provided, comprising modules or units for executing the method in aspect ten or any possible implementation of aspect ten.

[0079] In a twenty-fourth aspect, a communication device is provided, comprising a processor coupled to a memory, and configured to perform the method of any one of aspects 1 to 10, as well as any possible implementation of each of the above aspects. In one possible implementation, the communication device further comprises a memory. In one possible implementation, the communication device further comprises a communication interface, the processor coupled to the communication interface. In another possible implementation, the communication device further comprises a communication interface, the processor coupled to the communication interface.

[0080] In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver or an input / output interface. In one possible implementation, the transceiver may be a transceiver circuit. In one possible implementation, the input / output interface may be an input / output circuit.

[0081] In another implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver or an input / output interface. In one possible implementation, the transceiver may be a transceiver circuit. In another possible implementation, the input / output interface may be an input / output circuit.

[0082] In another implementation, the communication device is a chip or a chip system. When the communication device is a chip or a chip system, the communication interface can be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip or chip system. The processor can also be embodied as a processing circuit or a logic circuit.

[0083] In a twenty-fifth aspect, a communication device is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal via the input circuit and transmit a signal via the output circuit, so that the method of any one of aspects 1 to 10, and any possible implementation of any of the above aspects, is implemented.

[0084] In a specific implementation, the communication device may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, or various logic circuits. The input signal received by the input circuit may be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to a transmitter and transmitted by the transmitter. The input circuit and the output circuit may be different circuits or the same circuit, in which case the circuit functions as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation of the processor and various circuits.

[0085] In aspect 26, a processing device is provided, comprising a processor and a memory. The processor is configured to read instructions stored in the memory and receive signals via a receiver and transmit signals via a transmitter to execute the method of any one of aspects 1 to 10, and any possible implementation of any of the above aspects.

[0086] In a possible implementation, there are one or more processors and one or more memories.

[0087] In a possible implementation, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

[0088] In the specific implementation process, the memory can be a non-transitory memory, such as a read-only memory (ROM), which can be integrated with the processor on the same chip or can be set on different chips. The embodiments of the present application do not limit the type of memory and the setting method of the memory and the processor.

[0089] It should be understood that related data interaction processes, such as sending indication information, can be the process of outputting indication information from the processor, and receiving capability information can be the process of receiving input capability information from the processor. Specifically, the output data of the processing can be output to the transmitter, and the input data received by the processor can come from the receiver. The transmitter and receiver can be collectively referred to as a transceiver.

[0090] The processor in the above aspects can be a chip, which can be implemented by hardware or software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor can be a general-purpose processor, which is implemented by reading the software code stored in the memory. The memory can be integrated in the processor or located outside the processor and exist independently.

[0091] In aspect twenty-seven, a computer program product is provided, which includes: a computer program (also referred to as code, or instructions), which, when the computer program is run, enables the computer to execute any aspect from aspect one to aspect ten, as well as any possible implementation method of the above aspects.

[0092] In aspect 28, a computer-readable medium is provided, which stores a computer program (also referred to as code, or instructions) which, when run on a computer, enables the computer to execute any one of aspects 1 to 10 above, as well as any possible implementation of each of the aspects above.

[0093] In the twenty-ninth aspect, a chip system is provided, comprising a memory and a processor, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that a communication device equipped with the chip system executes the methods in any of the above-mentioned first to tenth aspects and their possible implementation methods.

[0094] Among them, the chip system may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

[0095] In the thirtieth aspect, a communication system is provided, comprising at least one of the aforementioned terminal devices and network devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0096] FIG1 is a schematic diagram of an example of a communication system to which the present application is applied.

[0097] FIG2 is a schematic diagram of a communication method provided in an embodiment of the present application.

[0098] FIG3 is a schematic diagram of a MAC CE signaling provided in an embodiment of the present application.

[0099] FIG4 is a schematic block diagram of a communication device provided in an embodiment of the present application.

[0100] FIG5 is a schematic block diagram of another communication device provided in an embodiment of the present application.

[0101] FIG6 is a schematic block diagram of a terminal device provided in an embodiment of the present application.

[0102] FIG7 is a schematic block diagram of a network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0103] The technical solution in this application will be described below with reference to the accompanying drawings.

[0104] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), wireless fidelity (WIFI), device to device (D2D) communication system, vehicle-to-everything (V2X) communication system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, machine to machine communication (M2M) system, machine type communication (MTC) system, Internet of Things (IoT) communication system, non-terrestrial network (NTN) system, the fifth generation mobile communication system (5G) system or new radio (NR) system or future wireless communication systems.

[0105] First, a communication system applicable to an embodiment of the present application is briefly introduced with reference to FIG1 as follows.

[0106] Referring to FIG. 1 , as an example, FIG. 1 is a schematic diagram of a wireless communication system 100 applicable to an embodiment of the present application. As shown in FIG. 1 , the wireless communication system 100 may include at least one network device, such as the network device 110 and the network device 130 shown in FIG. The wireless communication system 100 may also include at least one terminal device, such as the terminal device 120 shown in FIG. For example, both the network device and the terminal device may be configured with multiple antennas, and the network device and the terminal device may communicate using multi-antenna technology.

[0107] When the network device and the terminal device communicate, the network device can manage one or more cells, and a cell can include at least one terminal device. Optionally, the network device 110 and the terminal device 120 form a single-cell communication system, assuming that the cell is recorded as cell #1. The network device 110 can be a network device in cell #1, or the network device 110 can serve the terminal device (e.g., terminal device 120) in cell #1. Optionally, the network device 130 and the terminal device 120 form a single-cell communication system, assuming that the cell is recorded as cell #2. The network device 130 can be a network device in cell #2, or the network device 110 can serve the terminal device (e.g., terminal device 120) in cell #1.

[0108] It should be understood that if cell #1 is the current service cell of the terminal device 120 and cell #2 is the neighboring cell of the terminal device 120, the terminal device can communicate only through the cell #1 beam, or can communicate only through the cell #2 beam, or the terminal device can communicate through both the cell #1 beam and the cell #2 beam.

[0109] It should be noted that a cell can be understood as an area within the coverage range of wireless signals of network equipment.

[0110] It should be understood that FIG1 is merely a simplified schematic diagram for ease of understanding, and the wireless communication system 100 may further include other network devices or other terminal devices, which are not shown in FIG1 .

[0111] The terminal device in the embodiments of the present application may refer to a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved Public Land Mobile Network (PLMN), etc., and the embodiments of the present application are not limited thereto.

[0112] Wearable devices, also known as wearable smart devices, are a general term for wearable devices that use wearable technology to intelligently design and develop wearable devices for daily wear, such as glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include those that are fully functional, large in size, and can achieve full or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0113] Furthermore, the terminal device can also be a terminal device in the Internet of Things (IoT) system. IoT is an important component of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network that interconnects people, machines, and things.

[0114] It should be understood that this application does not limit the specific form of the terminal device.

[0115] The network device in the embodiment of the present application can also be a device for communicating with a terminal device. The network device can be a base station (Base Transceiver Station, BTS) in a Global System of Mobile communication (GSM) system or a Code Division Multiple Access (CDMA), or a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, or an evolved base station (Evolved NodeB, eNB or eNodeB) in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or the communication device can be a relay station, an access point, a vehicle-mounted device, a wearable device, a communication device in a 5G network, or a communication device in a future evolved PLMN network, etc., and the embodiments of the present application are not limited.

[0116] It should be understood that the network device in the wireless communication system can be any device with wireless transceiver functions. The device includes, but is not limited to, an evolved Node B (eNB), a radio network controller (RNC), a road side unit (RSU), a node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., home evolved node B, or home node B, HNB), a baseband unit (BBU), an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc. It may also be a gNB or a transmission point (TRP or TP) in a 5G (such as NR) system, or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DPU). unit, DU), etc. The network device can also be a network-side device in the Internet of Vehicles that provides communication services or communication control for terminal devices.

[0117] The network device provides communication services for the terminal devices in the cell. The terminal devices in the cell communicate with the network device through the transmission resources allocated by the network device (for example, frequency domain resources, time domain resources, etc.). The cell may belong to a macro base station (for example, a macro eNB or a macro gNB, etc.).

[0118] To facilitate understanding of the embodiments of the present application, the terms involved in the present application are first briefly explained.

[0119] 1. Beam

[0120] The embodiment of the beam in the NR protocol can be a spatial domain filter, or a spatial filter, or a spatial domain parameter, a spatial parameter, a spatial domain setting, a spatial setting, or Quasi Co-Location (QCL) information, a QCL assumption, a QCL indication, etc. The beam can be indicated by a transmission configuration indication state (TCI state) parameter or by a spatial relation parameter. Therefore, in this application, the beam can be replaced by a spatial domain filter, a spatial filter, a spatial parameter, a spatial parameter, a spatial setting, a spatial setting, QCL information, a QCL assumption, a QCL indication, a TCI state (including downlink (DL) TCI state, uplink (UL) TCI state), a spatial relationship, etc. The above terms are also equivalent to each other. The beam can also be replaced by other terms representing the beam, which is not limited in this application.

[0121] The beam used to transmit a signal may be referred to as a transmission beam (Tx beam), or may also be referred to as a spatial domain transmission filter, a spatial transmission filter, a spatial domain transmission parameter, or a spatial transmission parameter, a spatial domain transmission setting, or a spatial transmission setting. The downlink transmit beam may be indicated by a TCI state.

[0122] The beam used to receive signals can be called a reception beam (Rx beam), and can also be called a spatial domain reception filter, a spatial reception filter, a spatial domain reception parameter, or a spatial reception parameter, a spatial domain reception setting, or a spatial reception setting. The uplink transmit beam can be indicated by a spatial relation, an uplink TCI state, or a Sounding Reference Signal (SRS) resource (indicating the transmit beam using the SRS). Therefore, the uplink beam can also be replaced by an SRS resource.

[0123] The transmit beam may refer to the distribution of signal strength in different directions in space after the signal is transmitted by the antenna, and the receive beam may refer to the distribution of signal strength in different directions in space of the wireless signal received from the antenna.

[0124] Furthermore, the beam can be a wide beam, a narrow beam, or other types of beams. The beam forming technology can be beamforming technology or other technologies. The beamforming technology can specifically be digital beamforming technology, analog beamforming technology, or hybrid digital / analog beamforming technology.

[0125] Beams generally correspond to resources. For example, when performing beam measurement, network equipment uses different resources to measure different beams. The terminal device then provides feedback on the measured resource quality, allowing the network equipment to determine the quality of the corresponding beam. During data transmission, beam information is also indicated by its corresponding resource. For example, the network equipment uses the transmission configuration indicator (TCI) resource in the downlink control information (DCI) to indicate to the terminal device the physical downlink shared channel (PDSCH) beam information.

[0126] Optionally, multiple beams with the same or similar communication characteristics can be considered a single beam. A beam can include one or more antenna ports for transmitting data channels, control channels, and sounding signals. The one or more antenna ports forming a beam can also be considered an antenna port set.

[0127] In the embodiments of the present application, unless otherwise specified, a beam refers to a transmit beam. In beam measurement, each beam of a network device corresponds to a resource, so the beam corresponding to the resource can be uniquely identified by the resource index.

[0128] 2. Resources

[0129] In beam measurement, the beam corresponding to the resource can be uniquely identified by the resource index.

[0130] The resource may be an uplink signal resource or a downlink signal resource.

[0131] Uplink signals include, but are not limited to, a sounding reference signal (SRS) and a demodulation reference signal (DMRS).

[0132] Downlink signals include, but are not limited to, channel state information reference signal (CSI-RS), cell specific reference signal (CS-RS), user equipment specific reference signal (US-RS), demodulation reference signal (DMRS), and synchronization signal / physical broadcast channel block (SS / PBCH block). The SS / PBCH block can be referred to as a synchronization signal block (SSB).

[0133] Resources can be configured through radio resource control (RRC) signaling.

[0134] In the configuration structure, a resource is a data structure that includes relevant parameters of its corresponding uplink / downlink signal, such as the type of uplink / downlink signal, the resource element carrying the uplink / downlink signal, the sending time and period of the uplink / downlink signal, the number of ports used to send the uplink / downlink signal, etc.

[0135] Each uplink / downlink signal resource has a unique index to identify the uplink / downlink signal resource. It is understandable that the resource index can also be called the resource identifier, and the embodiment of the present application does not impose any limitation on this.

[0136] 3. Transmission Configuration Indication State (TCI state).

[0137] TCI is used to indicate the quasi-co-location (QCL) relationship between two reference signals: the target reference signal and the referenced reference signal. The target reference signal is generally the demodulation reference signal (DMRS), and the referenced reference signal is generally the channel state information-reference signal (CSI-RS) and the SSB (SS / PBCH block) composed of the primary synchronization signal (PSS), the secondary synchronization signal (SSS), and the physical broadcast channel (PBCH).

[0138] Each TCI state includes its own index TCI state identifier (ID) and two QCL-Infos. QCL-Info also includes a referenced reference signal (reference Signal) to indicate which reference signal forms a QCL relationship. In other words, when we say which reference signal forms a QCL relationship, we are referring to which beam forms a QCL relationship. The type of QCL-Info can have four values ​​{typeA, typeB, typeC, typeD}. Taking typeD as an example, typeD indicates that the two reference signal resources have the same spatial reception parameter information, that is, the two beams have the same receiving beam. At most one of the two QCL-Infos included in the TCI state can be typeD. In other words, the pairing relationship between the base station's transmit beam and the terminal device's receive beam is indicated by configuring the QCL-Info of typeD in the TCI state. That is, the terminal device can obtain the receive beam used to receive data through the QCL-Info of typeD in the received TCI state.

[0139] The following describes the configuration, activation, and indication of TCI state.

[0140] TCI state configuration: The network device configures multiple TCI states to the terminal device through RRC (Radio Resource Control) signaling. These TCI states each include a QCL-Info of type D.

[0141] TCI state activation: After the network device is configured with multiple TCI states, it is also necessary to activate 8 of the TCI states through the Medium Access Control-Control Element (MAC CE). These 8 TCI states correspond one-to-one to the 8 values ​​of the TCI field in the DCI. That is, which 8 TCI states the 8 values ​​of the TCI field of the DCI correspond to is determined by MAC CE signaling. There are many types of MAC CE. In addition to the MAC CE used for TCI state activation, there are also MAC CEs for other purposes. This application only relates to MAC CEs used for TCI state / TCI state combination activation. Therefore, unless otherwise specified, the MAC CEs described in this application refer to this type of MAC CE.

[0142] TCI state indication: The network device indicates a specific TCI state through the TCI field in the DCI. Through the specific value of the TCI field, the terminal device can determine the receiving beam corresponding to the data transmission beam, and thus use the corresponding receiving beam to receive data.

[0143] 4. Spatial relation

[0144] The spatial relation is used to indicate the transmit beam for uplink transmission. Its function is similar to TCIstate, and is used to inform the terminal device which transmit beam to use for uplink transmission.

[0145] Spatial relations also need to be configured through RRC signaling. The configuration information includes the spatial relation ID, cell ID, target reference signal resources, path loss measurement reference signal, power control parameters, etc.

[0146] The target reference signal resource (which can be any one of SRS / SSB / CSI-RS) is used to indicate the corresponding uplink beam. If uplink transmission uses spatial relation #1, and this spatial relation #1 includes a target reference signal resource #2, it means that the transmit beam used for the uplink transmission is the transmit / receive beam of the target reference signal.

[0147] For example, when the target reference signal resource is an uplink resource SRS, it means that the transmission beam used for uplink transmission is the transmission beam of the SRS (the transmission beam of the SRS is known).

[0148] For another example, the target reference signal resource is a downlink resource such as SSB / CSI-RS, indicating that the transmit beam used for uplink transmission is the receive beam of the SSB / CSI-RS (the receive beam of the SSB / CSI-RS is known).

[0149] Network equipment can configure multiple spatial relations for terminal devices. One of these relations is then activated through MAC CE for the corresponding data transmission. Uplink transmissions, including the Physical Uplink Control Channel (PUCCH), SRS, and Physical Uplink Shared Channel (PUSCH), all require corresponding spatial relations. The spatial relation of the PUCCH is indicated through MACCE signaling. The spatial relation of the SRS is also indicated through MACCE signaling. When transmitting, the PUSCH is associated with a specific SRS and uses the spatial relation of that SRS for transmission.

[0150] 5. Unified TCI

[0151] Unified TCI is a unified beam indication framework. The network device can indicate a beam to the terminal device, and the beam is used for multiple channels and / or reference signals at the same time. The common beam can be an uplink common beam, a downlink common beam, or an uplink and downlink common beam. The terminal device can use the common beam in subsequent transmissions. That is, the network device can indicate an uplink common beam to the terminal device for the transmission of multiple uplink channels and / or uplink reference signals. It can also indicate a downlink common beam to the terminal device for the transmission of multiple downlink channels and / or downlink reference signals. It can also indicate an uplink and downlink common beam to the terminal device for the transmission of multiple uplink channels and / or uplink reference signals, as well as multiple downlink channels and / or downlink reference signals. In other words, the uplink and downlink common beams can be used for both uplink and downlink transmissions.

[0152] Terminal devices can be configured with two TCI states: DL or joint TCI and UL TCI.

[0153] The UE can be configured with joint / DL TCI states (up to 128) and UL TCI states (up to 64) at the same time.

[0154] The base station can configure the UE's current TCI mode to be joint or separate. In joint mode, a joint TCI state is indicated for both uplink and downlink transmissions. In separate mode, the base station needs to indicate the DL TCI state and UL TCI state for each, respectively.

[0155] When the UE receives TCI state activation signaling indicated by the MACCE, the activation signaling includes the TCI state identifier ID. The UE determines which TCI is activated by the MACCE according to the RRC configuration.

[0156] 6. Multi-transmission point unified TCI framework (mTRP unified TCI framework)

[0157] mTRP refers to multiple transmission and reception point, which allows the network to simultaneously transmit data (services) to a user through multiple nodes (multiple antennas, or multiple sites, or multiple transceiver units).

[0158] In a multi-station transmission scenario, the network device needs to indicate multiple common beams to the terminal device for multi-station transmission. As shown in Figure 1, two base stations transmit signals to the terminal device at the same time, and each base station uses a common beam. The network device needs to indicate the common beams corresponding to the two sites to the terminal device. After receiving the two common beams, the terminal device needs to further determine how the two common beams are applied to the transmission of each channel or reference signal. For example, some PDCCHs are sent through base station 110 and need to use common beam 1, some PDCCHs are sent through base station 130 and need to use common beam 2, and some PDCCHs are sent through both base station 110 and base station 130 and need to use common beam 1 and common beam 2 at the same time. Which PDCCH uses which common beam is what the terminal device needs to determine.

[0159] It should be understood that transmission in this application may refer to sending or receiving.

[0160] mTRP scenarios are further divided into single DCI mTRP (SDCI mTRP) and multiple DCI mTRP (mDCImTRP). SDCI mTRP refers to when two nodes serving a single user have ideal backhaul (meaning the information exchange delay between the two nodes is negligible), allowing the two nodes to jointly serve the UE in a very close manner. In this case, one of the two nodes sends DCI to achieve unified / joint scheduling of the UE. In this case, DCI only needs to be sent once, and this DCI will indicate the beams used by the UE to receive data from both nodes (i.e., two beams for each node). mDCImTRP refers to when two nodes serving a single user (i.e., TRPs) do not have ideal backhaul (meaning the information exchange delay between the two nodes is large and non-negligible), and the two nodes cannot jointly serve the UE in a very close manner. In this case, the two nodes should independently schedule the UE. Due to independent scheduling, the two nodes need to independently send DCI commands to the UE for scheduling. Therefore, the resource allocation and beam indication of the two nodes are sent separately via two independent DCIs.

[0161] This application focuses on the SDCI mTRP scenario.

[0162] 7. Timing Advance (TA)

[0163] Signals experience latency during spatial transmission. The farther a terminal is from a network device, the greater the delay in the signal reaching the network device. Different terminals are at varying distances from the network device, so the time difference between signals arriving at the network device varies. Consequently, when a terminal receives downlink information from a network device and then sends an uplink signal, the signals arrive at the network device at different times. To ensure orthogonality in uplink transmissions and avoid intra-cell interference, terminal uplink transmissions must be timed ahead of downlink reception.

[0164] In the mTRP (multiple transmission and reception point) scenario, the network is allowed to transmit data (services) to a user simultaneously through multiple nodes (multiple antennas, or multiple sites, or multiple transceiver units). In the mTRP scenario, one cell corresponds to multiple sites (intra-cell mTRP), and the uplink transmission in the cell is sent to multiple sites. The distances between the terminal device and multiple sites are usually unequal, resulting in the use of different TA values ​​for signals transmitted to multiple sites. That is, in a service cell, the terminal device can use different TAs for uplink transmission to communicate with network equipment. Currently, one cell corresponds to a maximum of two sites, that is, within a cell, a maximum of two TAs can be maintained between the terminal device and the network equipment.

[0165] In addition, for non-serving cells, the network device does not need to configure the detailed parameters of the cell to the terminal device. Instead, it only needs to configure the relevant information of the SSB (Synchronization Signal and PBCH Block) of the non-serving cell to the terminal device. When one site is located in the current serving cell but the other site is located in a non-serving cell (inter-cell mTRP, inter-cell multi-site), two TAs can also be maintained between the terminal device and the network device.

[0166] 8. Control Resource Set (CORESET)

[0167] Control Resource Set (CORESET) and Search Space (SS).

[0168] CORESET may indicate the frequency domain resource location of the control channel and the symbol length occupied in the time domain, wherein the symbol may be an orthogonal frequency division multiplexing (OFDM) symbol.

[0169] The search space may indicate time domain location information of the control channel.

[0170] For example, the CORESET defines the frequency domain resource location of a resource block and the symbol length it occupies in the time domain. The search space defines the location of the resource block in the time domain, that is, the search space defines the period, time slot position, and starting symbol position of the resource block in the time domain. As can be seen above, the CORESER defines the time-frequency size of the resource block; the CORESER and the search space together define the time-frequency information of the resource block.

[0171] It should be noted that the time domain information and frequency domain information of the resource block defined jointly by the CORESET and the search space correspond to the time domain information and frequency domain information of the resources occupied by the control channel.

[0172] The control channel mentioned in this document refers to the Physical Downlink Control Channel (PDCCH).

[0173] 9. Beam Failure Recovery

[0174] For mTRP scenarios, there are two existing beam failure recovery mechanisms: cell-level beam failure recovery and TRP-level beam failure recovery.

[0175] When the terminal device configures only one beam failure detection reference signal set (BFD-RS set) and one candidate beam set for each bandwidth part (BWP) of each cell, the beam failure detection set consists of one or more periodic CSI-RSs, and the candidate beam set consists of one or more periodic CSI-RSs or SSBs. The terminal device performs beam failure detection based on the CSI-RS in a configured beam failure detection set and determines a candidate beam from a candidate beam set. This method can be understood as cell-level beam failure recovery, that is, one cell corresponds to one beam failure detection set and one candidate beam set.

[0176] When the terminal device configures two beam failure detection sets and two candidate beam sets for each cell and each BWP, the beam failure detection sets and the candidate beam sets are associated one-to-one, and two PUCCH scheduling request resources are also configured, which are associated with the two beam failure detection sets respectively. When the RS in one of the beam failure detection sets detects a beam failure, the terminal selects a new beam from the candidate beam set associated with the beam failure detection set, and applies for uplink scheduling through the PUCCH resource associated with the beam failure detection set. Then the network device sends an uplink scheduling request, and the terminal device sends a MAC CE. The MAC CE contains information such as the beam failure detection set ID, whether there is a new beam, and the new beam ID. It can be understood that when a beam of a TRP fails, the beam failure information and new beam information are sent through another TRP, which can be called TRP-level beam failure recovery. When beam failure occurs in both TRPs, the random access process is triggered.

[0177] When the network device does not explicitly configure a beam failure detection set (either one or two), the terminal device can monitor the two beams corresponding to the PDCCH. When the terminal configures the first CORESET and the second CORESET corresponding to the control channel group identifier (CORESETPoolIndex) #0 and #1 respectively, the terminal device uses the RS of the TCI state of the CORESET corresponding to CORESETPoolIndex#i as the i-th BFD-RS set.

[0178] The network device can configure the TCI state to be associated with one of multiple TAs. When the network device instructs the terminal device which TCI state to use for uplink transmission, the terminal uses the TA associated with the TCI state for uplink transmission.

[0179] When a beam failure occurs on a terminal device, the terminal device can determine a new beam (i.e., an SSB or CSI-RS in the candidate beam set). Before a new TCI state is indicated, the terminal device can refer to this RS for uplink and downlink transmissions. However, this RS is not associated with a TA, so before a new TCI state is indicated, the terminal device cannot determine which TA to use for uplink transmissions.

[0180] The present application provides a variety of communication determination methods that can determine the TA for uplink transmission before the terminal device receives a new TCI state indication.

[0181] It should be understood that the description of the specific scenarios in the embodiments of the present application is only an example. In addition to being applicable to the application scenarios described above, the methods provided in the embodiments of the present application are also applicable to application scenarios with similar problems.

[0182] In the description of the embodiments of the present application, unless otherwise specified, "a plurality of" or "a plurality of" means two or more. In addition, "at least one" can be replaced by "one or more".

[0183] The ordinal numbers "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects and are not used to limit the size, content, order, timing, priority, or importance of the multiple objects. For example, the first indication information and the second indication information can be the same information or different information, and such names do not indicate differences in the content, size, application scenario, sender / receiver, priority, or importance of the two messages. In addition, the numbering of the steps in the various embodiments introduced in this application is only for distinguishing different steps and is not used to limit the order of the steps.

[0184] The technical solutions provided in the embodiments of this application can be applied to wireless communications between communication devices. Wireless communications between communication devices may include: wireless communications between network devices and terminals, wireless communications between network devices, and wireless communications between terminals. In the embodiments of this application, the term "wireless communications" may also be referred to as "communication," which may also be described as "data transmission," "information transmission," or "transmission."

[0185] It should be understood that the names of all nodes and messages in this application are merely names set for the convenience of description in this application. The names in the actual network may be different. This application should not be understood as limiting the names of various nodes and messages. On the contrary, any name with the same or similar function as the node or message used in this application is regarded as a method or equivalent replacement of this application, and is within the scope of protection of this application. No further details will be given below.

[0186] The following describes in detail various communication methods provided in the embodiments of the present application with reference to the accompanying drawings.

[0187] It should be understood that the step numbers in the embodiments of the present application are for illustration only and do not limit the order in which the steps occur.

[0188] FIG2 shows a communication method 200 provided in the present application. The method 200 is applicable to a scenario of cell-level beam failure recovery. The method in FIG2 includes at least part of the following contents.

[0189] S201: The network device sends configuration information to the terminal device.

[0190] The network device sends RRC (Radio Resource Control) configuration information to the terminal device.

[0191] For cell-level beam failure recovery scenarios, the configuration information may include one or more of the following information: a beam failure detection reference signal set and a candidate beam reference signal set corresponding to each serving cell, an association between beam indication information (TCI state / spatial relation) and a TA or timing advance group (TAG) (i.e., an example of a first association), random access information for beam failure, etc. The random access information for beam failure may include one or more of a preamble sequence, a random access opportunity (RACH occasion), and an association between an SSB and a RACH occasion.

[0192] A TAG corresponds to a group of cells using the same TA value, and each TAG corresponds to a TAG identifier. Each TAG corresponds to a TA value, and all cells in each TAG group use that TA value. When a cell corresponds to a TAG (the correspondence between cells and TAGs is configured by the network equipment for the terminal device), uplink transmissions to that cell use the TA corresponding to that TAG.

[0193] In this application, the beam indication information can be any one of the transmission configuration indication state TCI state, spatial relation, uplink transmission configuration indication state UL TCI state, common transmission configuration indication state joint TCI state, and downlink transmission configuration indication state DL TCI state. This application does not limit this.

[0194] For the TRP-level beam failure recovery scenario, the configuration information may include one or more of the following: multiple beam failure detection reference signal sets and multiple candidate beam reference signal sets corresponding to each serving cell, and multiple scheduling request (SR) resource configurations carried on PUCCH. Among them, the scheduling request resources, beam failure detection reference signal sets and candidate beam reference signal sets of PUCCH correspond one to one and correspond to one TRP. Specifically, when a serving cell corresponds to two TRPs, the configuration information may include one or more of the following: two beam failure detection reference signal sets and two candidate beam reference signal sets corresponding to each serving cell, and two scheduling request (SR) resource configurations carried on PUCCH. Among them, the scheduling request resources, beam failure detection reference signal sets and candidate beam reference signal sets of PUCCH correspond one to one and correspond to one TRP.

[0195] S202, the terminal device triggers the beam failure recovery process.

[0196] When the network device displays a configuration of a beam failure detection reference signal set, if the terminal device detects that all RSs in the beam failure detection reference signal set have failed to transmit beams, the beam failure process is triggered. The terminal device detects that all RSs in the beam failure detection reference signal set have failed to transmit beams. It can be understood that if the terminal device detects that the quality of all RSs in the beam failure detection reference signal set is lower than the preset threshold for link failure for N consecutive times, it is considered that the terminal has a beam failure. N can be a positive integer greater than 1 configured by the network device. The preset threshold for link failure can be a signal strength threshold configured by the network device. When the network device only displays the configuration of one beam failure detection reference signal set, the beam failure recovery can be called a cell-level beam failure recovery scenario.

[0197] In one possible implementation, the serving cell in which the beam fails is a primary cell (Pcell) or a primary secondary cell (PSCell), and the network device configures a non-contention-based random access (CFRA) resource for beam failure recovery for the serving cell.

[0198] In this case, the terminal device performs beam failure recovery based on CFRA. The main process is as follows:

[0199] When the terminal device detects a new beam that meets the beam recovery condition in the candidate beam reference signal set, the terminal device sends a non-contention-based random access request message for beam failure recovery to the network device. For example, the random access pilot is sent using the CFRA resource associated with the new beam and carried in the physical random access channel (PRACH). The beam recovery condition can be understood as follows: the terminal device measures the reference signals in the candidate beam reference signal set, and the terminal device determines one of the reference signals as the reference signal of the new beam for beam failure recovery, and the quality of the reference signal (for example, L1-RSRP) is greater than or equal to the preset threshold for beam failure recovery.

[0200] When a network device receives a non-contention-based random access request message for beam failure recovery from a terminal device, the network device sends a beam failure recovery success response message to the terminal device. The beam failure recovery success response message is carried on a PDCCH, and the CORESET monitoring the PDCCH is associated with the search space set corresponding to the recovery search space identifier recoverySearchSpaceId.

[0201] When the terminal device monitors PDCCH in the CORESET associated with the search space set corresponding to the recovery search space identifier recoverySearchSpaceId, it can be understood that the terminal device has successfully received the beam recovery success response information sent by the network device, which means that the beam failure is recovered successfully, and the beam recovery success response information is carried in the PDCCH.

[0202] In another possible implementation, the serving cell with beam failure is a Pcell or a PScell, but the network device is not configured with CFRA resources for beam failure recovery or the network device is configured with contention-based random access (CBRA) resources for beam recovery.

[0203] In this case, the terminal device can perform beam failure recovery based on contention-based random access (CBRA) resources. The beam recovery process is as follows:

[0204] 1) The terminal device sends a first message Msg1 to the network device (Msg1 is mainly random pilot information and is carried on the PRACH);

[0205] 2) After receiving Msg1 sent by the terminal device, the network device sends a second message Msg2 to the terminal device (Msg2 is carried in PDCCH and PDSCH and includes random access response (RAR) information);

[0206] 3) After receiving Msg2 sent by the network device, the terminal device sends a third message Msg3 to the network device (Msg3 is carried in the PUSCH scheduled by the RAR uplink grant and mainly carries the user's unique identifier);

[0207] 4) After receiving Msg3 sent by the terminal device, the network device sends a fourth message Msg4 to the terminal device (Msg4 is carried in PDCCH and PDSCH, mainly carrying contention resolution information, indicating random access contention resolution).

[0208] When the terminal device receives Msg4 sent by the network device, it indicates that the beam failure is successfully recovered.

[0209] In another possible implementation, the serving cell with beam failure is a Pcell or PScell, and the network device configures the terminal device to perform a beam recovery process based on a 2-step random access resource. The beam recovery process is as follows:

[0210] 1) The terminal device sends MsgA to the network device (MsgA is carried on PRACH and PUSCH and mainly sends random access pilot information);

[0211] 2) The network device successfully receives MsgA sent by the terminal device and sends MsgB to the terminal device (MsgB is carried on PDCCH and PDSCH and mainly contains RAR information)

[0212] When the terminal device receives the PDCCH scrambled with the cell radio network temporary identifier (C-RNTI) carried in MsgB sent by the network device, it indicates that the beam failure recovery is successful.

[0213] When the network device displays that multiple beam failure detection reference signal sets are configured, when the terminal device detects that a beam failure occurs in one of the beam failure detection reference signal sets, the beam failure recovery of the set is triggered, and uplink resources are applied for through the associated PUCCH SR. Then the terminal sends beam failure information, new beam information, etc. by applying for uplink resources. The beam failure information and new beam information can be sent through the beam failure recovery media access control element (beam failure recovery MAC control element, BFR MAC CE) or enhanced BFR MAC CE. When the network device displays that multiple beam failure detection reference signal sets are configured, the beam failure recovery can be called a TRP-level beam failure recovery scenario. The solution of this application takes two beam failure detection reference signals as an example.

[0214] When the network device is not configured with a beam failure detection reference signal set, if the network device configures the first CORESET and the second CORESET for the terminal device and configures coresetPoolIndex 0 and 1 respectively, then the terminal device uses the periodic CSI-RS of the TCI state of the CORESET corresponding to CORESETPoolIndexi as the i-th beam failure detection reference signal set. When the terminal device detects that a beam failure occurs in one of the beam failure detection reference signal sets, the beam failure recovery of the set is triggered, and uplink resources are applied for through the associated PUCCH SR. Then, the terminal sends beam failure information, new beam information, etc. through the applied uplink resources. The beam failure information and new beam information can be sent through BFR MAC CE or enhanced BFR MAC CE. This beam failure recovery can also be called a TRP-level beam failure recovery scenario.

[0215] When the terminal device detects that both beam failure detection reference signal sets fail in the primary cell (Pcell) or the primary secondary cell (PSCell), the random access process is triggered, which is the scenario of cell-level beam failure recovery.

[0216] When a terminal device detects that both beam failure detection reference signal sets fail in a secondary cell (scell), if there are uplink resources of another cell used to send a beam failure recovery request, the ID of the cell with the beam failure and the new beam information are carried in the uplink resources via a BFR MAC CE or an enhanced BFR MAC CE. If there are no uplink resources of another cell used to send a beam failure recovery request, a dedicated uplink scheduling request for beam failure recovery is sent. When the network device sends an uplink scheduling, the terminal device sends the ID of the cell with the beam failure and the new beam information via a BFR MAC CE or an enhanced BFR MAC CE. In both cases, when the terminal device receives DCI from the network device, and the hybrid automatic repeat-request (HARQ) ID in the DCI is the same as the HARQ ID in the scheduling MAC CE, and the new data indicator (NDI) is flipped, it indicates that the beam failure recovery is successful.

[0217] S203, the terminal device determines the TA for uplink transmission.

[0218] When the terminal device successfully recovers from beam failure but before new beam indication information is given, the terminal device can determine the first TA for uplink transmission according to any one of the following methods.

[0219] Method 1

[0220] In step S201, the network device configures the association relationship between the beam indication information and the TA and indicates it to the terminal device, so that the terminal device can determine the first TA of the uplink transmission through the association relationship between the beam indication information and the TA or TAG.

[0221] Specifically, when a beam failure occurs in a terminal device, the terminal device determines the first reference signal (which may be referred to as q new ), the first reference signal is the reference signal corresponding to the new beam after the terminal device recovers from a beam failure. The first reference signal is the reference signal included in the first beam indication information; the terminal device determines a first TA, which is the TA corresponding to the first beam indication information, and the first TA is used for uplink transmission after the terminal device recovers from a beam failure.

[0222] For example, the terminal device may determine that q new The reference signal included in one or more TCI states is the same as that included in the one or more TCI states, thereby determining the one or more TCI states, selecting a TCI state (i.e., an example of the first beam indication information) therefrom, and determining that the TA corresponding to the selected TCI state is the TA for uplink transmission.

[0223] The terminal device can determine the q new The same as the reference signal included in one or more TCI states, or in other words, the terminal device determines that QCL-typeD is q new One or more TCI states.

[0224] In one possible implementation, a terminal device receives at least one beam indication information (such as TCI state) sent by a network device, where the beam indication information includes one or more reference signals, and at least one beam indication information includes first beam indication information.

[0225] Each beam indication information in the at least one beam indication information corresponds to its own first identification index, and the at least one beam indication information includes N beam indication information. Each beam indication information in the N beam indication information includes a first reference signal. The first beam indication information is the beam indication information with the largest or smallest first identification index among the N beam indication information, and N is a positive integer.

[0226] For example, QCL-typeD is q new There are multiple TCI states. A default rule may be used to determine a TCI state, for example, to determine a TCI state with the smallest or largest TCI state index, and use the TA corresponding to the TCI state as the TA for uplink transmission.

[0227] This application does not limit the beam indication information to TCI state, it can also be any one of spatial relation, UL TCI state, joint or DL ​​TCI state.

[0228] For example, when the terminal device operates in joint unified TCI mode, the terminal device determines that the reference signal of QCL type D is q new The joint or DL ​​TCI state is used and the TA associated with the joint or DL ​​TCI state is used for uplink transmission.

[0229] For another example, when the terminal device operates in separate unified TCI mode, the terminal device determines that QCL-typeD is q new UL TCI state, or SRS meets QCL-typeD RS is q new , and the QCL-typeD of the UL TCI state is the SRS, the TA associated with the UL TCI state is used for uplink transmission.

[0230] Method 2

[0231] In the beam failure recovery process described in S202, by carrying the first TA in the message sent by the network device to the terminal device, the terminal device can determine the first TA for uplink transmission after the beam failure is recovered.

[0232] Specifically, in a possible implementation manner, the terminal device performs beam failure recovery based on CFRA.

[0233] In this case, the terminal device sends a contention-based random access request message for beam failure recovery, and the terminal device receives a beam recovery success response message sent by the network device. The beam recovery success response message includes a first indication information, and the first indication information is used to indicate a first TA. The first TA is used for uplink transmission after the terminal device beam failure is recovered.

[0234] Specifically, the first indication information is carried in the downlink control signal format (DCI format) of the PDCCH by the cell radio network temporary identifier (Cell-Radio Network Temporary Identifier, C-RNTI) or the modulation and coding scheme cell radio network temporary identifier (modulation and coding scheme cell radio network temporary identifier, MCS-C-RNTI), and the CORESET of the PDCCH is monitored and associated with the search space set corresponding to the recovery search space identifier recoverySearchSpaceId. After receiving the PDCCH, the terminal refers to q new When performing uplink transmission, the TA information indicated by the first indication information is used for uplink transmission. In other words, the beam recovery success response information may include the first indication information, and the beam recovery success response information is carried in the PDCCH value associated with the search space set corresponding to CORESET and the recovery search space identifier recoverySearchSpaceId. The first indication information may be any one or more of the following:

[0235] The first indication information indicates a TAG id;

[0236] The first indication information may be a 1-bit field, indicating which TA is used after beam failure recovery. For example, when the network device configures two TA values ​​or two TAGs for a serving cell of the terminal device, when the first indication information is 0, it indicates that the first TA is used after the beam is recovered, or indicates the first TA or TAG of the serving cell; when the first indication information is 1, it indicates that the second TA is used after the beam is recovered, or indicates the second TA or TAG of the serving cell, and vice versa.

[0237] The first indication information may be used to indicate that the first TA value is 0.

[0238] In another possible implementation, the terminal device performs beam failure recovery based on CBRA.

[0239] In this case, the terminal device sends a contention-based random access request message for beam failure recovery, and the terminal device receives random access response information (i.e., the second information). The random access response information includes first indication information, and the first indication information is used to indicate the first TA. The first TA is used for uplink transmission after the beam failure of the terminal device is recovered.

[0240] Optionally, after the terminal device receives the random access response information, the terminal device sends third information and receives contention resolution information (ie, fourth information), where the contention resolution information includes the first indication information.

[0241] Specifically, the first indication information is carried in the random access response information and / or the contention resolution information. After the terminal device receives the contention resolution information, the terminal device refers to q new When performing uplink transmission, the TA information indicated by the first indication information is used for uplink transmission. The first indication information can be any one or more of the following:

[0242] The first indication information indicates a TAG id;

[0243] The first indication information may be a 1-bit field, indicating which TA is used after beam failure recovery. For example, when the network device configures two TA values ​​or two TAGs for a serving cell of the terminal device, when the first indication information is 0, it indicates that the first TA is used after the beam is recovered, or indicates the first TA or TAG of the serving cell; when the first indication information is 1, it indicates that the second TA is used after the beam is recovered, or indicates the second TA or TAG of the serving cell, and vice versa.

[0244] The first indication information may be used to indicate that the first TA value is 0.

[0245] The first indication information may be carried in the PDCCH or PDSCH in the second information. Specifically, the first indication information may be carried in the PDCCH for scheduling the RAR, or in the RAR signaling. The first indication information may also be carried in the PDCCH or PDSCH in the fourth information, specifically, it may be carried in the PDCCH for scheduling contention resolution information, or carried in contention resolution information. Optionally, the TA used to send the third information may be the TA value carried by the RAR or the TA value corresponding to the TAG id carried by the RAR, or TA=0 may be used for uplink transmission.

[0246] In another possible implementation, the terminal device performs beam failure recovery based on 2-step CBRA. In this case, the terminal device sends MsgA for beam failure recovery to the network device; the terminal device monitors MsgB sent by the network device. MsgB includes first indication information, which is used to indicate a first TA, which is used for uplink transmission of the terminal device after beam failure recovery.

[0247] Specifically, the first indication information can be carried in the PDCCH and / or PDSCH of MsgB. For example, after the terminal device sends MsgA containing a MAC CE encrypted by the C-RNTI, the terminal monitors the PDCCH encrypted by the C-RNTI, and the PDCCH can contain the first indication information. Optionally, the network device also sends RAR signaling, and the RAR signaling contains the first indication information. Optionally, when the network device sends a fallback RAR UL grant to the terminal device, the network device sends contention resolution information to the terminal device, and the contention resolution information is carried on the PDSCH, and the PDSCH contains the first indication information.

[0248] The first indication information may be any one or more of the following:

[0249] The first indication information indicates a TAG id;

[0250] The first indication information may be a 1-bit field, indicating which TA is used after beam failure recovery. For example, when the network device configures two TA values ​​or two TAGs for a serving cell of the terminal device, when the first indication information is 0, it indicates that the first TA is used after the beam is recovered, or indicates the first TA or TAG of the serving cell; when the first indication information is 1, it indicates that the second TA is used after the beam is recovered, or indicates the second TA or TAG of the serving cell, and vice versa.

[0251] The first indication information may be used to indicate that the first TA value is 0.

[0252] Method 3

[0253] The network device configures the association relationship between the reference signal and TA in the first candidate beam reference signal set (i.e., the second association relationship) and indicates it to the terminal device, so that the terminal device can determine the first TA of uplink transmission through the association relationship between the reference signal and TA or TAG.

[0254] Specifically, when a beam failure occurs in the terminal device, a first reference signal is determined, and the first reference signal belongs to a first candidate beam reference signal set. The terminal device determines a first TA based on a second association relationship, and the first TA is a TA corresponding to the first reference signal.

[0255] Optionally, a reference signal receiving power (RSRP) of the first reference signal is greater than an RSRP threshold for beam failure recovery, so that the terminal determines that the first reference signal is a reference signal of a new beam after beam failure recovery.

[0256] The second association relationship can be any one or more of the following:

[0257] The second association relationship may be that each reference signal configuration of the first candidate beam reference signal set is associated with a TAG id;

[0258] When the network device configures two TAs for a service cell of the terminal device, the second association may be a direct configuration or indication of whether each reference signal of the first candidate beam reference signal set is associated with the first TA or the second TA.

[0259] For example, a TAG id is configured in the BFR-SSB-Resource or BFR-CSI-RS-Resource, or the configuration directly indicates the first TA or the second TA; or, the network device configures the first candidate beam set to include two reference signal groups (groups), each reference signal group includes one or more reference signals, and the network device configures each group to be associated with a TAG id or the first TA or the second TA, or, the protocol specifies a rule that the first group is associated with the first TA or the minimum / maximum TAG id of the cell, and the second group is associated with the second TA / or the minimum / maximum TAG id of the cell; or, the protocol specifies a rule that the first X RSs are associated with the first TA, and the last Y RSs are associated with the second TA.

[0260] The above three methods are applicable to the scenarios of cell-level beam failure recovery and TRP-level beam failure recovery. The following introduces three methods for determining the first TA applicable to the TRP-level beam failure recovery scenario.

[0261] When one of the beam failure detection reference signal sets of the terminal device fails, and when the beam failure of the set is successfully recovered, but before a new beam indication is made, the terminal device can determine the TA of the uplink transmission according to any one of the following methods.

[0262] Method 4

[0263] The network device configures the association relationship between the beam failure detection reference signal set and the TAG / TA (i.e., the third association relationship), and determines the first TA of the uplink transmission through the association relationship between the beam failure detection reference signal set and the TAG / TA.

[0264] In one possible implementation, a beam failure occurs in at least one reference signal in a first beam failure detection reference signal set of a terminal device, and the terminal device determines that the first beam failure detection reference signal set is associated with the first TA based on a third association relationship. When the first beam failure detection reference signal set fails, the terminal performs beam failure recovery on the first beam failure detection set and then uses the first TA for uplink transmission.

[0265] The third association relationship is an association relationship between at least one beam failure detection reference signal set and the TA. The third association relationship can be any one or more of the following:

[0266] The third association relationship can be an association relationship between each beam failure detection reference signal set and TAG id. For example, the network device configures two TAs and two beam failure detection reference signal sets for a service cell of the terminal device. The first beam failure detection reference signal set is associated with TAG id0, and the second beam failure detection reference signal set is associated with TAG id1.

[0267] The third association relationship can be an association relationship between at least one beam failure detection reference signal set and a TAG id. For example, the network device configures two TAs and two beam failure detection reference signal sets for a service cell of the terminal device, and only configures one of the beam failure detection reference signal sets to be associated with a TAG id. Then the terminal device can consider that the other beam failure detection reference signal set is associated with another TAG id.

[0268] The third association relationship can be an association relationship between each beam failure detection reference signal set and the first TA or the second TA. For example, the network device configures two TAs and two beam failure detection reference signal sets for a service cell of the terminal device. The first beam failure detection reference signal set is associated with the first TA, and the second beam failure detection reference signal set is associated with the second TA.

[0269] The third association relationship can be an association relationship between at least one beam failure detection reference signal set and a TAG id. For example, the network device configures two TAs and two beam failure detection reference signal sets for a service cell of the terminal device, and only configures one of the beam failure detection reference signal sets to be associated with the first TA. Then the terminal device can consider that the other beam failure detection reference signal set is associated with the second TA.

[0270] The third association relationship may be an association relationship between each reference signal in each beam failure detection reference signal set and the TAG id or the first TA or the second TA.

[0271] In another possible implementation, the network device configures an association relationship between the candidate beam reference signal set and the TAG / TA (i.e., the fourth association relationship), and the terminal device determines that the first candidate beam reference signal corresponds to the first TA based on the fourth association relationship. The terminal device has a beam failure and determines the first reference signal. The first reference signal belongs to the first candidate beam reference signal set, and the terminal uses the first TA for uplink transmission.

[0272] The fourth association relationship is an association relationship between at least one candidate beam reference signal set and a TA. The fourth association relationship may be any one or more of the following:

[0273] The fourth association relationship can be an association relationship between each candidate beam reference signal set and TAG id. For example, the network device configures two TAs and two candidate beam reference signal sets for a service cell of the terminal device. The first candidate beam reference signal set is associated with TAG id0, and the second candidate beam reference signal set is associated with TAG id1.

[0274] The fourth association relationship can be an association relationship between at least one candidate beam reference signal set and a TAG id. For example, the network device configures two TAs and two candidate beam reference signal sets for a service cell of the terminal device, and only configures one of the candidate beam reference signal sets to be associated with a TAG id. Then the terminal device can consider that the other candidate beam reference signal set is associated with another TAG id.

[0275] The fourth association relationship can be an association relationship between each candidate beam reference signal set and the first TA or the second TA. For example, the network device configures two TAs and two candidate beam reference signal sets for a service cell of the terminal device. The first candidate beam reference signal set is associated with the first TA, and the second candidate beam reference signal set is associated with the second TA.

[0276] The fourth association relationship can be an association relationship between at least one candidate beam reference signal set and a TAG id. For example, the network device configures two TAs and two candidate beam reference signal sets for a service cell of the terminal device, and only configures one of the candidate beam reference signal sets to be associated with the first TA. Then the terminal device can consider that the other candidate beam reference signal set is associated with the second TA.

[0277] The fourth association relationship may be an association relationship between each reference signal in each candidate beam reference signal set and the TAG id or the first TA or the second TA.

[0278] In another possible implementation, the network device configures a third association relationship and a fifth association relationship for the terminal device, wherein the third association relationship is an association relationship between at least one beam failure detection reference signal set and the TA, and the fifth association relationship is a corresponding relationship between the beam failure detection reference signal set and the candidate beam reference signal set.

[0279] Specifically, when a beam failure occurs in the terminal device, the terminal device determines a first reference signal, and the first reference signal belongs to a first candidate beam reference signal set. The terminal device determines that the first candidate beam reference signal set corresponds to the first beam failure detection reference signal set based on the fifth association relationship, and the terminal device determines that the first beam failure detection reference signal set is associated with the first TA based on the third association relationship. Then the terminal device determines the first TA.

[0280] In another possible implementation, the network device configures a fourth association relationship and a fifth association relationship for the terminal device, wherein the fourth association relationship is an association relationship between at least one candidate beam reference signal set and the TA, and the fifth association relationship is a correspondence between a beam failure detection reference signal set and a candidate beam reference signal set.

[0281] Specifically, at least one reference signal in the first beam failure detection reference signal set of the terminal device has a beam failure, the terminal device determines that the first beam failure detection reference signal set corresponds to the first candidate beam reference signal set based on the fifth association relationship, and the terminal device determines that the first candidate beam reference signal set is associated with the first TA based on the third association relationship, then the terminal device determines the first TA.

[0282] In one possible implementation, a network device may indicate TAG or TA information via BFD-RS Indication MAC CE signaling. The BFD-RS Indication MAC CE is used to activate the BFD-RS in the beam failure detection reference signal set. The R field is now a reserved field, and the S field is used to indicate whether BFD-RS ID1 exists, that is, whether another reference signal in the beam failure detection reference signal set is activated for beam failure detection. Set 1 and Set 2 correspond to the first and second beam failure detection reference signal sets, respectively.

[0283] Optionally, each BFD-RS is associated with a TA. In this case, a TAG id or an identifier is indicated for each activated BFD-RS in the BFD-RS Indication MAC CE signaling, and the identifier is used to indicate the first TA or the second TA.

[0284] Specifically, as shown in Figure 3, one of the "R" fields preceding each BFD-RS is used to indicate a specific TA. When this field is 0, it indicates the first TA; otherwise, it indicates the second TA, and vice versa. For example, if the "R" field preceding the first BFD-RS ID0 of Set1 is 0, it indicates that the TA corresponding to BFD-RS ID0 is the first TA; if the "R" field preceding the first BFD-RS ID0 of Set1 is 1, it indicates that the TA corresponding to BFD-RS ID0 is the second TA, and vice versa. For another example, if the first or second "R" field preceding the second BFD-RS ID0 of Set1 is used to indicate a TA, then if the first or second "R" field is 0, it indicates that the TA corresponding to BFD-RS ID1 is the first TA; if the first or second "R" field is 1, it indicates that the TA corresponding to BFD-RS ID1 is the second TA, and vice versa.

[0285] Optionally, each BFD-RS set is associated with a TA. In this case, a TAG id or an identifier is indicated for each BFD-RS set in the BFD-RS Indication MAC CE signaling, and the identifier is used to indicate the first TA or the second TA.

[0286] Specifically, as shown in Figure 3, the "R" field before the first BFD-RS ID0 of Set1 and Set2 is used to indicate a TA value. When this field is 0, it indicates the first TA, otherwise it indicates the second TA, and vice versa. For example, if the "R" field before the first BFD-RS ID0 of Set1 is 0, it indicates that the TA corresponding to Set1 is the first TA, that is, after a beam failure occurs in BFD-RS ID0 and BFD-RS ID1, the TA used for uplink transmission after the beam failure is recovered is the first TA; if the "R" field before the first BFD-RS ID0 of Set1 is 1, it indicates that the TA corresponding to Set1 is the second TA, that is, after a beam failure occurs in BFD-RS ID0 and BFD-RS ID1, the TA used for uplink transmission after the beam failure is recovered is the second TA.

[0287] Optionally, the first "R" field in the signaling indicates that a specified TA is used after a beam failure in any beam failure detection reference signal set, or indicates whether TA = 0 is used for uplink transmission. For example, when the first "R" field in the signaling indicates the first TA or the second TA, if the field indicates 0, it means that after a beam failure occurs in any BFD-RS set in Set1 or Set2, the TA used for uplink transmission after the beam failure is recovered is the first TA; if the field indicates 1, it means that after a beam failure occurs in any BFD-RS set in Set1 or Set2, the TA used for uplink transmission after the beam failure is recovered is the second TA, and vice versa. For another example, when the first "R" field in the signaling indicates that the TA is 0 after the beam failure is recovered, if the field indicates 1, it means that after a beam failure occurs in any BFD-RS set in Set1 or Set2, the TA used for uplink transmission after the beam failure is recovered is 0, and vice versa.

[0288] Method 5

[0289] When the network device does not display the configuration of the beam failure detection reference signal set, if the terminal device monitors the periodic CSI-RS transmission of the TCI state of the PDCCH and fails, when the terminal device recovers from the beam failure, the terminal uses the TA associated with the TCI state of the PDCCH received before the beam failure for uplink transmission.

[0290] Specifically, in one possible implementation, the network device is not configured with a beam failure detection reference signal set. If the terminal device is configured as the first CORESET and the second CORESET are configured with coresetPoolIndex 0 and 1 respectively, then the RS of the TCI state of the CORESET corresponding to the CORESETPoolIndexi of the terminal device is used as the i-th beam failure detection reference signal set. When a beam failure occurs in the i-th beam failure detection reference signal set of the terminal device, after the beam failure recovery is successful, when the first reference signal is referenced for uplink transmission, the TA associated with the TCI state of the CORESET corresponding to the CORESETPoolIndexi is used.

[0291] In another possible implementation, the network device is not configured with a beam failure detection reference signal set. If the terminal device only configures coresetPoolIndex 1 for the second CORESET, the terminal device determines the RSs of the TCI states corresponding to the first CORESET and the second CORESET as the first and second beam failure detection reference signal sets. If a beam failure occurs in the first beam failure detection reference signal set of the terminal device, then after the beam failure recovery is successful, the q newDuring uplink transmission, the TA associated with the TCI state of the first CORESET is used; otherwise, the TA associated with the TCI state of the second CORESET is used.

[0292] In another possible implementation, the network device is not configured with a beam failure detection reference signal set, nor is it configured with coresetPoolIndex or is only configured with coresetPoolIndex 0. Then, after the terminal device successfully recovers from a beam failure, the TA associated with the TCI state of the PDCCH before the beam failure is used.

[0293] Method 6

[0294] When the terminal device recovers from beam failure, it uses the TA sent by each uplink channel before the beam failure for uplink transmission. new Perform beam failure recovery. When the terminal device is based on q new Before sending SRS and indicating a new beam, uplink transmission is performed based on the TA of the SRS before the beam failure. new Before sending PUCCH and indicating a new beam, uplink transmission is performed based on the TA of the PUCCH before the beam failure. new Before sending PUSCH and indicating a new beam, uplink transmission is performed based on the TA of the PUSCH before the beam failure.

[0295] When a terminal device operates within the Unified TCI framework and recovers from a beam failure, the terminal device uses the TA associated with the beam indication information for uplink transmission before the beam failure. In other words, the terminal device determines a first TA, which is the TA corresponding to the third beam indication information, and the third beam indication information is the beam indication information used for uplink transmission before the beam failure.

[0296] Specifically, before a beam failure occurs in the terminal device, the third beam indication information is used for uplink transmission. The TA corresponding to the third beam indication information is the first TA. When the beam recovery failure is successful, the terminal device determines the first reference signal for uplink transmission. The TA used for uplink transmission through the first reference signal is the first TA.

[0297] It should be understood that before the terminal beam fails, the first TCI state and the second TCI state are used to perform uplink transmission with the two sites. When one of the beams fails and recovers, one of the TCI states is updated to use q new The first TCI state is updated to adopt q new Transmission as an example, when using qnew For uplink transmission, the terminal device uses the TA associated with the first TCI state.

[0298] Optionally, when two TAs are configured for each serving cell of a terminal device, the terminal may be restricted from configuring cell-level beam failure recovery;

[0299] Optionally, when two TAs are configured for each service cell of the terminal device, the terminal device may be limited to display two beam failure detection sets configured.

[0300] For the above method 200, the terminal device determines the first TA in the above manner, and the first TA may be valid in the first time period.

[0301] The starting time of the first time period is the first time, which is any one of the following times:

[0302] The time after the first successful recovery of the terminal equipment beam failure;

[0303] The moment after the second duration of time when the terminal device receives a beam recovery success response message;

[0304] The terminal device performs beam failure recovery based on contention-based random access, and the time after the terminal device receives the contention resolution message for the third duration;

[0305] The time when the terminal device is 28 symbols after the last symbol of the first physical downlink control channel PDCCH received in the recovery spatial search set;

[0306] The time after the terminal device sends the fifth duration of the first beam failure recovery media access control element BFR MAC CE;

[0307] At the moment when the terminal device receives 28 symbols after the last symbol in the first PDCCH, the first PDCCH and the downlink control information DCI format scheduling the first physical uplink shared channel PUSCH have the same automatic hybrid repeat request HARQ process and the NDI field is flipped.

[0308] In a possible implementation, the end time of the first time period is the second time, and the second time is any one of the following times:

[0309] The moment after the fourth time duration after the terminal device receives the DCI signaling indicating the new beam indication information;

[0310] A moment five times after the terminal device sends a first positive acknowledgment (ACK) feedback message, where the first ACK feedback message is used to indicate that the terminal has successfully received the DCI signaling for beam indication;

[0311] The moment after the terminal device receives the seventh duration of the media access control unit MAC CE signaling for activating the beam indication information;

[0312] At the moment eighth time after the terminal device sends the second ACK feedback information, the second ACK feedback information is used to indicate that the terminal has successfully received the MAC CE signaling for activating the beam indication information.

[0313] Figure 4 is a schematic block diagram of a communication device 400 provided in an embodiment of the present application. The device 400 includes a transceiver unit 410 and a processing unit 420. The transceiver unit 410 can communicate with the outside world, and the processing unit 420 is used to process data. The transceiver unit 410 can also be referred to as a communication interface or a communication unit.

[0314] In a possible implementation, the apparatus 400 may further include a storage unit, which may be used to store instructions and / or data, and the processing unit 420 may read the instructions and / or data in the storage unit.

[0315] The device 400 can be used to execute the actions performed by the base station in the above method embodiment. In this case, the device 400 can be a base station or a component that can be configured in a base station. The transceiver unit 410 is used to execute the transceiver-related operations on the base station side in the above method embodiment, and the processing unit 420 is used to execute the processing-related operations on the base station side in the above method embodiment.

[0316] Alternatively, the device 400 can be used to execute the actions performed by the terminal device in the above method embodiment. In this case, the device 400 can be a terminal device or a component that can be configured on the terminal device. The transceiver unit 410 is used to execute the transceiver-related operations on the terminal device side in the above method embodiment, and the processing unit 420 is used to execute the processing-related operations on the terminal device side in the above method embodiment.

[0317] As shown in Figure 5, an embodiment of the present application further provides a communication device 500. The communication device 500 includes a processor 510, which is coupled to a memory 520. The memory 520 is used to store computer programs or instructions and / or data. The processor 510 is used to execute the computer programs or instructions and / or data stored in the memory 520, so that the method in the above method embodiment is executed.

[0318] In a possible implementation, the communication device 500 includes one or more processors 510 .

[0319] In a possible implementation, as shown in FIG5 , the communication device 500 may further include a memory 7520 .

[0320] In a possible implementation, the communication device 500 may include one or more memories 520 .

[0321] In a possible implementation, the memory 520 may be integrated with the processor 510 or provided separately.

[0322] In one possible implementation, as shown in FIG5 , the wireless communication device 500 may further include a transceiver 530 , which is configured to receive and / or transmit signals. For example, the processor 510 is configured to control the transceiver 530 to receive and / or transmit signals.

[0323] As a solution, the communication device 500 is used to implement the operations performed by the base station in the above method embodiment.

[0324] For example, the processor 510 is used to implement the processing-related operations performed by the base station in the above method embodiment, and the transceiver 530 is used to implement the sending and receiving-related operations performed by the base station in the above method embodiment.

[0325] As another solution, the communication device 500 is used to implement the operations performed by the terminal device in the above method embodiment.

[0326] For example, the processor 510 is used to implement the processing-related operations performed by the terminal device in the above method embodiment, and the transceiver 530 is used to implement the sending and receiving-related operations performed by the terminal device in the above method embodiment.

[0327] The present application also provides a communication device 600, which can be a terminal device or a chip. The communication device 600 can be used to perform the operations performed by the terminal device in the above-described method embodiments. When the communication device 600 is a terminal device, FIG6 shows a simplified schematic diagram of the terminal device structure. For ease of understanding and illustration, FIG6 uses a mobile phone as an example of a terminal device. As shown in FIG6, the terminal device includes a processor, memory, radio frequency circuitry, an antenna, and input / output devices. The processor is primarily used to process communication protocols and communication data, control the terminal device, execute software programs, and process software program data. The memory is primarily used to store software programs and data. The radio frequency circuitry is primarily used to convert baseband signals into radio frequency signals and process radio frequency signals. The antenna is primarily used to transmit and receive radio frequency signals in the form of electromagnetic waves. Input / output devices, such as a touch screen, display, and keyboard, are primarily used to receive user input and output data to the user. It should be noted that some types of terminal devices may not have input / output devices.

[0328] When data needs to be sent, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the RF circuit. The RF circuit performs RF processing on the baseband signal and then sends the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data. For ease of explanation, only one memory and processor are shown in Figure 6. In an actual terminal device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be set independently of the processor or integrated with the processor, and this is not limited in the embodiments of the present application.

[0329] In the embodiment of the present application, the antenna and radio frequency circuit with transceiver functions can be regarded as the transceiver unit of the terminal device, and the processor with processing function can be regarded as the processing unit of the terminal device.

[0330] As shown in Figure 6, the terminal device includes a transceiver unit 610 and a processing unit 620. The transceiver unit 610 may also be called a transceiver, a transceiver, a transceiver device, etc. The processing unit 620 may also be called a processor, a processing board, a processing module, a processing device, etc.

[0331] In one possible implementation, the device in the transceiver unit 610 that implements the receiving function can be considered a receiving unit, and the device in the transceiver unit 610 that implements the transmitting function can be considered a transmitting unit. That is, the transceiver unit 610 includes a receiving unit and a transmitting unit. The transceiver unit may also be sometimes referred to as a transceiver, a transceiver, or a transceiver circuit. The receiving unit may also be sometimes referred to as a receiver, a receiver, or a receiving circuit. The transmitting unit may also be sometimes referred to as a transmitter, a transmitter, or a transmitting circuit.

[0332] For example, in one implementation, the transceiver unit 610 is used to perform a receiving operation of the terminal device, and the processing unit 620 is used to perform a processing action on the terminal device side.

[0333] It should be understood that FIG6 is merely an example and not a limitation, and the terminal device including the transceiver unit and the processing unit may not rely on the structure shown in FIG6.

[0334] When the communication device 600 is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit may be an input / output circuit or a communication interface; the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip. The input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, or various logic circuits. The input signal received by the input circuit may be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by a transmitter. The input circuit and the output circuit may be different circuits or the same circuit. In this case, the circuit functions as an input circuit and an output circuit at different times.

[0335] The present application also provides a communication device 700, which can be a base station or a chip. The communication device 700 can be used to perform the operations performed by the base station in the above method embodiment.

[0336] When the communication device 700 is a base station. Figure 7 shows a simplified schematic diagram of the base station structure. The base station includes parts 710 and 720. Part 710 is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals into baseband signals; part 720 is mainly used for baseband processing, controlling the base station, etc. Part 710 can generally be referred to as a transceiver unit, transceiver, transceiver circuit, or transceiver. Part 720 is generally the control center of the base station, and can generally be referred to as a processing unit, which is used to control the base station to perform the processing operations on the network device side in the above-mentioned method embodiment.

[0337] The transceiver unit in section 710, which may also be referred to as a transceiver or transceiver, includes an antenna and radio frequency circuitry, with the radio frequency circuitry primarily responsible for radio frequency processing. In one possible implementation, the device in section 710 that implements the receiving function can be considered a receiving unit, and the device that implements the transmitting function can be considered a transmitting unit. That is, section 710 includes both a receiving unit and a transmitting unit. The receiving unit can also be referred to as a receiver, receiver, or receiving circuit, and the transmitting unit can be referred to as a transmitter, transmitter, or transmitting circuit.

[0338] Section 720 may include one or more boards, each of which may include one or more processors and one or more memories. The processor is used to read and execute programs in the memory to implement baseband processing functions and control the base station. If multiple boards are present, the boards may be interconnected to enhance processing capabilities. As an optional implementation, multiple boards may share one or more processors, multiple boards may share one or more memories, or multiple boards may simultaneously share one or more processors.

[0339] For example, in one implementation, the transceiver unit of part 710 is used to execute the transceiver-related steps executed by the base station in the embodiment; and part 720 is used to execute the processing-related steps executed by the base station.

[0340] It should be understood that FIG7 is merely an example and not a limitation, and the network device including the transceiver unit and the processing unit may not rely on the structure shown in FIG7 .

[0341] When the communication device 700 is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit may be an input / output circuit or a communication interface; the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip. The input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, or various logic circuits. The input signal received by the input circuit may be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by a transmitter. The input circuit and the output circuit may be different circuits or the same circuit. In this case, the circuit functions as an input circuit and an output circuit at different times.

[0342] An embodiment of the present application also provides a computer-readable storage medium on which computer instructions are stored for implementing the method executed by the terminal device or the method executed by the base station in the above method embodiment.

[0343] For example, when the computer program is executed by a computer, the computer can implement the method executed by the terminal device or the method executed by the base station in the above method embodiment.

[0344] An embodiment of the present application also provides a computer program product comprising instructions, which, when executed by a computer, enables the computer to implement the method executed by a terminal device or the method executed by a network device in the above method embodiment.

[0345] An embodiment of the present application also provides a communication system, which includes the base station and terminal equipment in the above embodiment.

[0346] The explanation and beneficial effects of the relevant contents in any of the wireless communication devices provided above may refer to the corresponding method embodiments provided above, and will not be repeated here.

[0347] In an embodiment of the present application, a terminal device or network device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer may include hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also known as main memory). The operating system of the operating system layer may be any one or more computer operating systems that implement business processing through processes, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system. The application layer may include applications such as browsers, address books, word processing software, and instant messaging software.

[0348] The embodiments of the present application do not particularly limit the specific structure of the execution subject of the method provided in the embodiments of the present application; as long as it is possible to communicate according to the method provided in the embodiments of the present application by running a program that records the code of the method provided in the embodiments of the present application, it is sufficient. For example, the execution subject of the method provided in the embodiments of the present application may be a terminal device or a base station, or a functional module in the terminal device or base station that can call and execute the program.

[0349] Various aspects or features of the embodiments of the present application can be implemented as methods, devices, or articles of manufacture using standard programming and / or engineering techniques. As used herein, the term "article of manufacture" can encompass a computer program accessible from any computer-readable device, carrier, or medium. For example, a computer-readable medium can include, but is not limited to, magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical disks (e.g., compact discs (CDs), digital versatile discs (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memories (EPROMs), cards, sticks, or key drives, etc.).

[0350] The various storage media described herein may represent one or more devices and / or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0351] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0352] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM may include the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0353] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated into the processor.

[0354] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0355] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of this application.

[0356] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0357] In the several embodiments provided in the embodiments of the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0358] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0359] 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 separately, or two or more units may be integrated into one unit.

[0360] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0361] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the embodiments of the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: include: The terminal device sends a physical random access channel PRACH; The terminal device receives random access response RAR information, where the RAR information includes first indication information, where the first indication information indicates timing advance group TAG information, and the RAR is a response to the PRACH; The terminal device sends third information, the third information is carried in the physical uplink shared channel PUSCH scheduled by the uplink authorization of the RAR information, and the timing advance TA used for sending the third information is the TA corresponding to the TAG indicated by the first indication information.

2. The method according to claim 1, characterized in that Two TAGs are configured in the serving cell of the terminal device; The first indication information indicating the timing advance group TAG information includes: the first indication information indicating one TAG of two TAGs of the serving cell.

3. The method according to claim 2, characterized in that When the first indication information is 0, it indicates the first TAG of the serving cell. When the first indication information is 1, indicating the second TAG of the serving cell; or, When the first indication information is 1, it indicates the first TAG of the serving cell. When the first indication information is 0, it indicates the second TAG of the serving cell.

4. A communication method, characterized in that: include: The network device receives a physical random access channel PRACH; The network device sends random access response RAR information, where the RAR information includes first indication information, where the first indication information indicates timing advance group TAG information, and the RAR is a response to the PRACH; The network device receives third information, where the third information is carried in a physical uplink shared channel PUSCH scheduled by the uplink grant of the RAR information, and a timing advance TA used to send the third information is a TA corresponding to the TAG indicated by the first indication information.

5. The method according to claim 4, characterized in that Two TAGs are configured in the serving cell of the terminal device; The first indication information indicating the timing advance group TAG information includes: the first indication information indicating one TAG of two TAGs of the serving cell.

6. The method according to claim 5, characterized in that When the first indication information is 0, it indicates the first TAG of the serving cell. When the first indication information is 1, indicating the second TAG of the serving cell; or, When the first indication information is 1, it indicates the first TAG of the serving cell. When the first indication information is 0, it indicates the second TAG of the serving cell.

7. A communication method, characterized in that: include: When a beam failure occurs in a terminal device, the terminal device determines a first reference signal, where the first reference signal is a reference signal corresponding to a new beam after the beam failure of the terminal device is recovered, and the first reference signal is a reference signal included in the first beam indication information; The terminal device determines a first TA, where the first TA is the TA corresponding to the first beam indication information, and the first TA is used for uplink transmission after the terminal device beam fails and recovers.

8. The method according to claim 7, characterized in that The terminal device determines a first TA, including: The terminal device determines the first TA based on a first association relationship, where the first association relationship is an association relationship between at least one beam indication information and a TA, and the at least one beam indication information includes the first beam indication information.

9. The method according to claim 7 or 8, characterized in that: The method further comprises: The terminal device receives configuration information of at least one beam indication information, where the beam indication information includes one or more reference signals, and the at least one beam indication information includes the first beam indication information.

10. The method according to any one of claims 7 to 9, characterized in that The first association relationship is configured by a network device.

11. The method according to any one of claims 8 to 10, characterized in that The method further comprises: Each beam indication information in the at least one beam indication information corresponds to its own first identification index, and the at least one beam indication information includes N beam indication information, each beam indication information in the N beam indication information includes the first reference signal, and the first beam indication information is the beam indication information with the largest or smallest first identification index in the N beam indication information, and N is a positive integer.

12. The method according to any one of claims 7 to 11, characterized in that The first TA is used for uplink transmission in a first time period, the start time of the first time period is a first time, and the first time is any one of the following time periods: The moment after the first duration of successful recovery of the terminal device beam failure; The moment after the second time duration when the terminal device receives the beam recovery success response information; The terminal device performs beam failure recovery based on contention-based random access, and the moment after the terminal device receives a contention resolution message for a third period of time; The terminal device recovers the time 28 symbols after the last symbol in the first physical downlink control channel PDCCH received in the spatial search set; The time after the fifth duration of the terminal device sending the first beam failure recovery media access control unit BFR MAC CE; At the moment when the terminal device receives 28 symbols after the last symbol in the first PDCCH, the first PDCCH and the downlink control information DCI format scheduling the first physical uplink shared channel PUSCH have the same automatic hybrid repeat request HARQ process and the new data indication NDI field is flipped.

13. The method according to claim 12, characterized in that The end time of the first time period is a second time, and the second time is any one of the following times: The moment after the fourth time duration after the terminal device receives the DCI signaling indicating the new beam indication information; A moment five time intervals after the terminal device sends first positive confirmation ACK feedback information, where the first ACK feedback information is used to indicate that the terminal has successfully received DCI signaling for indicating new beam indication information; The time after the terminal device receives the seventh duration of the media access control unit MAC CE signaling for activating the beam indication information; At the moment eighth time after the terminal device sends the second ACK feedback information, the second ACK feedback information is used to indicate that the terminal has successfully received the MAC CE signaling used to activate the beam indication information.

14. A communication method, characterized in that: include: The terminal device sends a non-contention-based random access request message for beam failure recovery. The terminal device receives beam recovery success response information, the beam recovery success response information includes first indication information, the first indication information is used to indicate a first TA, the first TA is used for uplink transmission after the terminal device beam fails to recover, and the beam recovery success response information is carried in a PDCCH associated with a recovery search space set; or, The terminal device sends contention-based random access request information for beam failure recovery, The terminal device receives random access response information, where the random access response information includes first indication information, where the first indication information is used to indicate a first TA, and the first TA is used for uplink transmission after the terminal device beam fails and recovers.

15. The method according to claim 14, characterized in that After the terminal device receives the random access response information, the method further includes: The terminal device sends third information, where the third information is used to carry the identity of the terminal device; The terminal device receives contention resolution information, where the contention resolution information includes the first indication information.

16. The method according to claim 14 or 15, characterized in that The first TA is used for uplink transmission in a first time period, the start time of the first time period is a first time, and the first time is any one of the following time periods: The moment after the first duration of successful recovery of the terminal device beam failure; The moment after the second time duration when the terminal device receives the beam recovery success response information; The terminal device performs beam failure recovery based on contention-based random access, and the moment after the terminal device receives a contention resolution message for a third period of time; The terminal device recovers the time 28 symbols after the last symbol in the first physical downlink control channel PDCCH received in the spatial search set; The time after the fifth duration of the terminal device sending the first beam failure recovery media access control unit BFR MAC CE; At the moment when the terminal device receives 28 symbols after the last symbol in the first PDCCH, the first PDCCH and the downlink control information DCI format scheduling the first physical uplink shared channel PUSCH have the same automatic hybrid repeat request HARQ process and the NDI field is flipped.

17. The method according to claim 16, characterized in that The end time of the first time period is a second time, and the second time is any one of the following times: The moment after the fourth time duration after the terminal device receives the DCI signaling indicating the new beam indication information; The time after the fifth time period after the terminal device sends the first positive confirmation ACK feedback information, the first ACK feedback information is used to indicate Indicates that the terminal successfully receives the DCI signaling for beam indication; The time after the terminal device receives the seventh duration of the media access control unit MAC CE signaling for activating the beam indication information; At the moment eighth time after the terminal device sends the second ACK feedback information, the second ACK feedback information is used to indicate that the terminal has successfully received the MAC CE signaling used to activate the beam indication information.

18. A communication method, characterized in that: include: A beam failure occurs in at least one reference signal in a first beam failure detection reference signal set of a terminal device, the first beam failure detection reference signal set corresponds to a first control resource set pool index CORESETpoolindex, the first control resource set pool index corresponds to second beam indication information, and the second beam indication information is used by the terminal device to monitor the physical downlink control channel PDCCH associated with the first CORESETpoolindex before the beam failure; The terminal device determines a first TA, where the first TA is the TA corresponding to the second beam indication information, and the first TA is used for uplink transmission after the terminal device beam failure is recovered.

19. The method according to claim 18, characterized in that The first TA is used for uplink transmission in a first time period, the start time of the first time period is a first time, and the first time is any one of the following time periods: The moment after the first duration of successful recovery of the terminal device beam failure; The moment after the second time duration when the terminal device receives the beam recovery success response information; The terminal device performs beam failure recovery based on contention-based random access, and the moment after the terminal device receives a contention resolution message for a third period of time; The terminal device recovers the time 28 symbols after the last symbol in the first physical downlink control channel PDCCH received in the spatial search set; The time after the fifth duration of the terminal device sending the first beam failure recovery media access control unit BFR MAC CE; At the moment when the terminal device receives 28 symbols after the last symbol in the first PDCCH, the first PDCCH and the downlink control information DCI format scheduling the first physical uplink shared channel PUSCH have the same automatic hybrid repeat request HARQ process and the NDI field is flipped.

20. The method according to claim 19, characterized in that The end time of the first time period is a second time, and the second time is any one of the following times: The moment after the fourth time duration after the terminal device receives the DCI signaling indicating the new beam indication information; A moment after the fifth time period after the terminal device sends a first positive confirmation ACK feedback information, where the first ACK feedback information is used to indicate that the terminal has successfully received the DCI signaling for beam indication; The time after the terminal device receives the seventh duration of the media access control unit MAC CE signaling for activating the beam indication information; At the moment eighth time after the terminal device sends the second ACK feedback information, the second ACK feedback information is used to indicate that the terminal has successfully received the MAC CE signaling used to activate the beam indication information.

21. A communication method, characterized in that: include: The network device receives a non-contention-based random access request message for beam failure recovery, The network device sends beam recovery success response information, the beam recovery success response information includes first indication information, the first indication information is used to indicate a first TA, the first TA is used for uplink transmission after the terminal device beam fails to recover, and the beam recovery success response information is carried in a PDCCH associated with the recovery search space set; or, The network device receives contention-based random access request information for beam failure recovery, The network device sends a random access response message, and the random access response message includes first indication information, and the first indication information is used to indicate a first TA, and the first TA is used for uplink transmission after the terminal device beam fails and recovers.

22. The method according to claim 21, characterized in that After the network device sends the random access response information, the method further includes: The network device receives and sends third information, where the third information is used to carry the identity of the terminal device; The network device sends contention resolution information, where the contention resolution information includes the first indication information.

23. A communication device, characterized in that: include: A sending unit, used for sending a physical random access channel PRACH; A receiving unit, configured to receive random access response RAR information, where the RAR information includes first indication information, where the first indication information indicates timing advance group TAG information, and the RAR is a response to the PRACH; The sending unit is further configured to send third information, wherein the third information is carried in a physical uplink scheduled by the uplink grant of the RAR information. In the shared channel PUSCH, the timing advance TA used for sending the third information is the TA corresponding to the TAG indicated by the first indication information.

24. The device according to claim 23, characterized in that Two TAGs are configured in the serving cell of the device; The first indication information indicating the timing advance group TAG information includes: the first indication information indicating one TAG of two TAGs of the serving cell.

25. The device according to claim 24, characterized in that When the first indication information is 0, it indicates the first TAG of the serving cell. When the first indication information is 1, indicating the second TAG of the serving cell; or, When the first indication information is 1, it indicates the first TAG of the serving cell. When the first indication information is 0, it indicates the second TAG of the serving cell.

26. A communication device, characterized in that: include: A receiving unit, configured to receive a physical random access channel PRACH; a sending unit, configured to send random access response RAR information, where the RAR information includes first indication information, where the first indication information indicates timing advance group TAG information, and the RAR is a response to the PRACH; The receiving unit is configured to receive third information, where the third information is carried in a physical uplink shared channel PUSCH scheduled by the uplink grant of the RAR information, and the timing advance TA used to send the third information is the TA corresponding to the TAG indicated by the first indication information.

27. The device according to claim 26, characterized in that Two TAGs are configured in the serving cell of the terminal device; The first indication information indicating the timing advance group TAG information includes: the first indication information indicating one TAG of two TAGs of the serving cell.

28. The device according to claim 27, characterized in that When the first indication information is 0, it indicates the first TAG of the serving cell. When the first indication information is 1, indicating the second TAG of the serving cell; or, When the first indication information is 1, it indicates the first TAG of the serving cell. When the first indication information is 0, it indicates the second TAG of the serving cell.

29. A communication device, characterized in that: include: A unit for implementing the method of any one of claims 1 to 3; or, a unit for implementing the method of any one of claims 7 to 13; or, a unit for implementing the method of any one of claims 14 to 17; or, a unit for implementing the method of any one of claims 18 to 20.

30. A communication device, characterized in that: include: A unit for implementing the method of any one of claims 4 to 6; or a unit for implementing the method of claim 21 or 22.

31. A computer-readable storage medium, characterized in that: The computer readable storage medium stores a computer program. When the computer program is executed, Execute the method according to any one of claims 1 to 3, or Execute the method according to any one of claims 4 to 6, or Execute the method according to any one of claims 7 to 13, or Execute the method according to any one of claims 14 to 17, or Performing the method according to any one of claims 18 to 20, or Execute the method as claimed in claim 21 or 22.

32. A chip system, characterized in that: comprising: a processor for calling and running a computer program from a memory, Execute the method according to any one of claims 1 to 3, or Execute the method according to any one of claims 4 to 6, or Execute the method according to any one of claims 7 to 13, or Execute the method according to any one of claims 14 to 17, or Performing the method according to any one of claims 18 to 20, or Execute the method as claimed in claim 21 or 22.

33. A communication system, characterized in that: It comprises a terminal device and a network device, wherein the terminal device is used to execute the method according to any one of claims 14 to 17, and the network device is used to execute the method according to claim 21 or 22.

34. A communication system, characterized in that: The method comprises a terminal device and a network device, wherein the terminal device is used to execute the method according to any one of claims 1 to 3, and the network device is used to execute the method according to any one of claims 4 to 6.

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