Communication method and communication device

Abstract

Provided are a communication method and a communication device, the method comprising: when a beam failure occurs in a terminal device, the terminal device determining a first reference signal, the first reference signal being a reference signal corresponding to a new beam after the beam failure of the terminal device is recovered, the first reference signal is a reference signal included in the first beam indication information; the terminal device determines a first timing advance (TA), the first TA is a TA corresponding to the first beam indication information, and the first TA is used for uplink transmission after the beam failure recovery of the terminal device, and the method can determine the TA for uplink transmission before the terminal device receives new beam indication information.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular, to a communication method and a communication device. Background Art

[0002] The network device instructs the terminal device to send beam-related information by transmitting beam indication information. The network device can configure the beam indication information to be associated with one of the 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.

[0003] When a beam failure occurs in the terminal device, the terminal device can determine a new beam. Before the terminal device receives new beam indication information, the terminal device can perform uplink and downlink transmissions through the reference signal (RS) of the new beam. However, the RS is not associated with the TA, so before the terminal device receives new beam indication information, it is impossible to determine which TA to use for uplink transmission. Summary of the invention

[0004] 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.

[0005] In a first aspect, a communication method is provided, which can be executed by a terminal device, or can also be executed by a component (such as a chip or circuit) of the terminal device, without limitation. For ease of description, the following description is based on an example of execution by a terminal device.

[0006] 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.

[0007] Based on the above technical solution, a new beam adopted by the terminal device after beam failure recovery 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.

[0008] 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, then 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.

[0009] Beam failure of a 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.

[0010] 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.

[0011] 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 periodic CSI-RS 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.

[0012] In the present application, the beam indication information may 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 the present application does not limit this.

[0013] 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, 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.

[0014] In a possible implementation, the method also 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 at least one beam indication information includes first beam indication information.

[0015] In a possible implementation manner, the first association relationship is configured by a network device.

[0016] In a 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.

[0017] In a second aspect, a communication method is provided, which can be executed by a terminal device, or can also be executed by a component (such as a chip or circuit) of the terminal device, without limitation. For ease of description, the following description is based on an example of execution by a terminal device.

[0018] 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 a 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 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 a first TA, and the first TA is used for uplink transmission after the terminal device beam failure is recovered.

[0019] Based on the above technical solution, during the process of beam failure recovery of the terminal device, the first TA is carried in the message sent by the network device to the terminal device. The first TA 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.

[0020] Determine a new beam adopted by the terminal device after beam failure recovery, 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.

[0021] 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.

[0022] In a third aspect, a communication method is provided, which can be executed by a terminal device, or can also be executed by a component (such as a chip or circuit) of the terminal device, without limitation. For ease of description, the following description is based on an example of execution by a terminal device.

[0023] The method may 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, 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 the beam failure.

[0024] 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.

[0025] In a fourth aspect, a communication method is provided, which can be executed by a terminal device, or can also be executed by a component (such as a chip or circuit) of the terminal device, without limitation. For ease of description, the following description is based on an example of execution by a terminal device.

[0026] The method may include: a beam failure occurs in a terminal device, a first reference signal is determined, 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.

[0027] Based on the above technical solution, a reference signal corresponding to a new beam after the terminal device beam fails to recover is determined, and a TA corresponding to the reference signal is determined as the TA for uplink transmission after the beam fails to recover.

[0028] 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.

[0029] In a possible implementation manner, the second association relationship is configured by a network device.

[0030] 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 (such as a chip or circuit) of the terminal device, without limitation. For ease of description, the following description is based on an example of execution by a terminal device.

[0031] 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.

[0032] Based on the above technical solution, a beam failure detection reference signal set for a terminal device in which a beam failure occurs is determined, and the TA corresponding to the beam failure detection reference signal set is determined as the TA for uplink transmission after beam failure recovery.

[0033] 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.

[0034] In a possible implementation manner, the third association relationship is configured by a network device.

[0035] 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 (such as a chip or circuit) of the terminal device, without limitation. For ease of description, the following description is based on an example of execution by a terminal device.

[0036] The method may include: a beam failure occurs in a terminal device, a first reference signal is determined, 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 candidate beam reference signal set.

[0037] Based on the above technical solution, a new beam is determined after the terminal device beam fails to recover, and the new beam belongs to the first candidate beam reference signal set. 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.

[0038] 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.

[0039] In a possible implementation manner, the fourth association relationship is configured by a network device.

[0040] 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 (such as a chip or circuit) of the terminal device, without limitation. For ease of description, the following description is based on an example of execution by a terminal device.

[0041] 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 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.

[0042] Based on the above technical solution, a beam failure detection reference signal set for a terminal device in which a beam failure occurs is determined, and a 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 beam failure recovery.

[0043] In one possible implementation, the terminal device determines the first TA based on a fourth association relationship and a fifth association relationship, where 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 relationship between a beam failure detection reference signal set and a candidate beam reference signal set.

[0044] In a possible implementation manner, the fourth association relationship and the fifth association relationship are configured by a network device.

[0045] 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 (such as a chip or circuit) of the terminal device, without limitation. For ease of description, the following description is based on an example of execution by a terminal device.

[0046] The method may include: when a beam failure occurs in a 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 terminal device determines a first TA, which is the TA corresponding to the first beam failure detection reference signal set.

[0047] 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.

[0048] In one possible implementation, the terminal device determines the first TA based on a third association relationship and a fifth association relationship, where 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 correspondence relationship between the beam failure detection reference signal set and the candidate beam reference signal set.

[0049] In a possible implementation manner, the third association relationship and the fifth association relationship are configured by a network device.

[0050] 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 (such as a chip or circuit) of the terminal device, without limitation. For ease of description, the following description is based on an example of execution by a terminal device.

[0051] 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.

[0052] 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 as the TA for uplink transmission after the beam failure is recovered.

[0053] 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 (such as a chip or circuit) of the network device, without limitation. For ease of description, the following description is based on an example of execution by a network device.

[0054] The method may include: a 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 a 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 a PDCCH associated with a 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 a first TA, and the first TA is used for uplink transmission after the terminal device beam failure is recovered.

[0055] Based on the above technical solution, during the process of beam failure recovery of the terminal device, the first TA is carried in the message sent by the network device to the terminal device. The first TA 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.

[0056] 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.

[0057] In any aspect from the first aspect to the tenth aspect, and any possible implementation method of the above aspects, the first TA is used for uplink transmission in a first time period, and the starting time of the first time period is the first moment, and the first moment 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 terminal device performs beam failure recovery based on contention-based random access, and the terminal device receives the contention resolution message for the third duration; the moment after the terminal device receives the first physical downlink control channel PDCCH received in the recovery space search set 28 symbols after the last symbol; the moment after the terminal device sends the first beam failure recovery media access control unit BFR MAC CE for the fifth duration; the moment after the terminal device receives the last symbol in the first PDCCH 28 symbols after 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.

[0058] In a 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 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 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.

[0059] 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 fails to recover, 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 fails to recover.

[0060] 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.

[0061] In a possible implementation, the device also 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.

[0062] In a possible implementation manner, the first association relationship is configured by a network device.

[0063] In one possible implementation, each beam indication information in at least one beam indication information corresponds to its own first identification index, 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.

[0064] In the twelfth aspect, a communication device is provided, including: a sending unit, used to send non-competition-based random access request information for beam failure recovery; a receiving unit, used to receive 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, and the first TA is used for uplink transmission after the beam failure of the terminal device is recovered, and the beam recovery success response information is 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, and the receiving unit is also used to receive random access response information, the random access response information includes the 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 device beam failure is recovered.

[0065] In a possible implementation, the sending unit is further used to send third information, where the third information is used to carry the identity of the terminal device; the receiving unit is further used to receive contention resolution information, where the contention resolution information includes the first indication information.

[0066] 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 a 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 a 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.

[0067] 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 manner of the first aspect.

[0068] 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.

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

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

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

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

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

[0074] In the twenty-first aspect, a wireless communication device is provided, comprising various modules or units for executing the method in the eighth aspect or any possible implementation manner of the eighth aspect.

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

[0076] In the twenty-third aspect, a wireless communication device is provided, comprising various modules or units for executing the method in the tenth aspect or any possible implementation of the tenth aspect.

[0077] In a twenty-fourth aspect, a communication device is provided, including a processor, the processor is coupled to a memory, and can be used to perform any one of the first to tenth aspects, and the method in any possible implementation of the above aspects. In a possible implementation, the communication device also includes a memory. In a possible implementation, the communication device also includes a communication interface, the processor is coupled to the communication interface. In a possible implementation, the communication device also includes a communication interface, the processor is coupled to the communication interface.

[0078] 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.

[0079] 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 a possible implementation, the transceiver may be a transceiver circuit. In a possible implementation, the input / output interface may be an input / output circuit.

[0080] 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 may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or the chip system. The processor may also be embodied as a processing circuit or a logic circuit.

[0081] 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 used to receive a signal through the input circuit and transmit a signal through the output circuit, so that any aspect from the first aspect to the tenth aspect, and any possible implementation of the above aspects are implemented.

[0082] In the specific implementation process, the above-mentioned communication device can be a chip, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a trigger, and various logic circuits. The input signal received by the input circuit can be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit can be, for example, but not limited to, output to a transmitter and transmitted by the transmitter, and the input circuit and the output circuit can be different circuits or the same circuit. In this case, the circuit is used as an input circuit and an output circuit at different times. The embodiment of the present application does not limit the specific implementation method of the processor and various circuits.

[0083] In aspect 26, a processing device is provided, comprising a processor and a memory. The processor is used to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter to execute any aspect from aspect 1 to aspect 10, and any possible implementation of the above aspects.

[0084] In a possible implementation, there are one or more processors and one or more memories.

[0085] In a possible implementation, the memory may be integrated with the processor, or the memory may be separately provided with the processor.

[0086] 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 respectively. The embodiments of the present application do not limit the type of memory and the setting method of the memory and the processor.

[0087] It should be understood that the relevant data interaction process, such as sending indication information, can be a process of outputting indication information from a processor, and receiving capability information can be a process of receiving input capability information from a processor. Specifically, the processed output data can be output to a transmitter, and the input data received by the processor can come from a receiver. Among them, the transmitter and the receiver can be collectively referred to as a transceiver.

[0088] The processor in the above aspects can be a chip, which can be implemented by hardware or by 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 software codes stored in a memory. The memory can be integrated in the processor or can be located outside the processor and exist independently.

[0089] In the twenty-seventh aspect, a computer program product is provided, which includes: a computer program (also referred to as code, or instruction), which, when executed, enables a computer to execute any one of the first to tenth aspects, as well as a method in any possible implementation of the above aspects.

[0090] In the twenty-eighth aspect, a computer-readable medium is provided, which stores a computer program (also referred to as code, or instructions) which, when executed on a computer, enables the computer to execute any one of the first to tenth aspects above, as well as a method in any possible implementation of each of the above aspects.

[0091] 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 aspect of the above-mentioned first to tenth aspects and their possible implementation methods.

[0092] 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.

[0093] 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

[0094] Figure 1 This is a schematic diagram of an example of a communication system to which the present application is applicable.

[0095] Figure 2 It is a schematic diagram of a communication method provided in an embodiment of the present application.

[0096] Figure 3 This is a schematic diagram of a MAC CE signaling provided in an embodiment of the present application.

[0097] Figure 4 A schematic block diagram of a communication device provided in an embodiment of the present application.

[0098] Figure 5 A schematic block diagram of another communication device provided in an embodiment of the present application.

[0099] Figure 6 A schematic block diagram of a terminal device provided in an embodiment of the present application.

[0100] Figure 7 A schematic block diagram of a network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0101] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0102] 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, the sixth generation mobile communication system (6G) or new wireless (New Radio, NR) or future wireless communication systems.

[0103] First combine Figure 1 A communication system applicable to an embodiment of the present application is briefly introduced as follows.

[0104] See also Figure 1 , as an example, Figure 1 FIG. 1 is a schematic diagram of a wireless communication system 100 applicable to an embodiment of the present application. Figure 1 As shown, the wireless communication system 100 may include at least one network device, such as Figure 1 The network device 110 and the network device 130 shown in the figure, the wireless communication system 100 may also include at least one terminal device, such as Figure 1 The terminal device 120 is shown. 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 multiple antenna technology.

[0105] Wherein, 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.

[0106] 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.

[0107] It should be noted that a cell can be understood as an area within the coverage range of wireless signals of network equipment.

[0108] It should be understood that Figure 1 This is a simplified schematic diagram for ease of understanding only. The wireless communication system 100 may also include other network devices or other terminal devices. Figure 1 Not drawn in.

[0109] 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 function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted 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 to this.

[0110] Among them, wearable devices can also be called wearable smart devices, which are a general term for the intelligent design and development of wearable devices for daily wear using wearable technology, 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 clothes or accessories. Wearable devices are not only hardware devices, but also realize powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and independent of smartphones to achieve complete or partial functions, 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.

[0111] In addition, the terminal device can also be a terminal device in the Internet of Things (IoT) system. IoT is an important part 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 and machines and things.

[0112] It should be understood that the present application does not limit the specific form of the terminal device.

[0113] The network device in the embodiment of the present application may also be a device for communicating with a terminal device. The network device may 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 may 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.

[0114] It should be understood that the network device in the wireless communication system can be any device with wireless transceiver function. 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 can 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 (DBU). The network device can also be a network-side device that provides communication services or communication control for terminal devices in the Internet of Vehicles.

[0115] 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.).

[0116] To facilitate understanding of the embodiments of the present application, the terms involved in the present application are first briefly explained.

[0117] 1. Beam

[0118] 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 a quasi-colocation (QCLn) 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 domain parameter, a spatial parameter, a spatial setting, a spatial setting, QCL information, a QCL assumption, a QCL indication, a TCI state (DL TCI state, 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.

[0119] The beam used to transmit a signal may be referred to as a transmission beam (Tx beam), and 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 transmission beam may be indicated by a TCI state.

[0120] The beam used to receive the signal 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 a transmit beam using the SRS). Therefore, the uplink beam can also be replaced by an SRS resource.

[0121] The transmit beam may refer to the distribution of signal strength in different directions of space after the signal is transmitted by the antenna, and the receive beam may refer to the distribution of signal strength in different directions of space of the wireless signal received from the antenna.

[0122] In addition, the beam may be a wide beam, a narrow beam, or other types of beams. The technology for forming the beam may be a beamforming technology or other technologies. The beamforming technology may specifically be a digital beamforming technology, an analog beamforming technology, or a hybrid digital / analog beamforming technology.

[0123] Beams generally correspond to resources. For example, when performing beam measurement, the network device measures different beams through different resources. The terminal device feeds back the measured resource quality, and the network device knows the quality of the corresponding beam. During data transmission, beam information is also indicated through its corresponding resources. For example, the network device indicates the terminal device's physical downlink shared channel (PDSCH) beam information through the transmission configuration indicator (TCI) resource in the downlink control information (DCI).

[0124] Optionally, multiple beams with the same or similar communication characteristics are regarded as one beam. One beam may include one or more antenna ports for transmitting data channels, control channels, and sounding signals. One or more antenna ports forming a beam may also be regarded as an antenna port set.

[0125] In the embodiments of the present application, unless otherwise specified, a beam refers to a transmission 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 index of the resource.

[0126] 2. Resources

[0127] In beam measurement, the beam corresponding to the resource can be uniquely identified by the resource index.

[0128] The resource may be an uplink signal resource or a downlink signal resource.

[0129] The uplink signal includes, but is not limited to, a sounding reference signal (SRS) and a demodulation reference signal (DMRS).

[0130] 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). SS / PBCH block can be referred to as synchronization signal block (SSB).

[0131] Resources can be configured through radio resource control (RRC) signaling.

[0132] In the configuration structure, a resource is a data structure, including relevant parameters of the 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.

[0133] Each uplink / downlink signal resource has a unique index to identify the uplink / downlink signal resource. It is understandable that the resource index may also be referred to as the resource identifier, and the present application embodiment does not impose any limitation on this.

[0134] 3. Transmission Configuration Indication State (TCI state).

[0135] TCI is used to indicate the quasi-co-location (QCL) relationship between two reference signals (target reference signal and referenced reference signal). The target reference signal is generally a demodulation reference signal (DMRS), and the referenced reference signal is generally a channel state information reference signal (CSI-RS) and an SSB (SS / PBCH block) composed of a primary synchronization signal (PSS), a secondary synchronization signal (SSS) and a physical broadcast channel (PBCH).

[0136] Each TCI state includes its own index TCI state Id and two QCL-Info. QCL-Info also includes a referenced reference signal (reference Signal) to indicate which reference signal forms a QCL relationship. In other words, here, which reference signal forms a QCL relationship actually refers 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-Info 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 type D in the TCI state. That is, the terminal device can obtain the receive beam used to receive data through the QCL-Info of type D in the received TCI state.

[0137] The following describes the configuration, activation, and indication of TCI state.

[0138] TCI state configuration: The network device configures multiple TCI states to the terminal device through RRC (Radio resource control) signaling. These TCI states all include a QCL-Info of type D.

[0139] TCI state activation: After the network device configures 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 MAC CE used for TCI state activation, there are also MAC CEs for other purposes. This application only relates to MAC CE used for TCI state / TCI state combination activation. Therefore, unless otherwise specified, the MAC CE described in this application refers to this type of MAC CE.

[0140] 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.

[0141] 4. Spatial relation

[0142] The spatial relation is used to indicate the transmit beam for uplink transmission. Its function is similar to that of the TCI state, and is used to inform the terminal device which transmit beam to use for uplink transmission.

[0143] Spatial relation also needs to be configured through RRC signaling. Its configuration information includes spatial relation ID, cell ID, target reference signal resources, path loss measurement reference signal, power control parameters, etc.

[0144] The target reference signal resource (which can be any one of SRS / SSB / CSI-RS) is used to indicate the corresponding uplink beam. If the uplink transmission adopts spatial relation#1, and the spatial relation#1 includes a target reference signal resource #2, it means that the transmission beam adopted for the uplink transmission is the transmission / reception beam of the target reference signal.

[0145] 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).

[0146] For another example, the target reference signal resource is a downlink resource such as SSB / CSI-RS, which means 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).

[0147] The network device can configure multiple spatial relations for the terminal device. Then one of them is activated through MAC CE for the corresponding data transmission. Uplink transmission includes Physical Uplink Control CHannel (PUCCH), SRS, PUSCH, etc., all of which require corresponding spatial relations. The spatial relation of PUCCH is indicated by MAC CE signaling. The spatial relation of SRS is also indicated by MAC CE signaling. When PUSCH is transmitted, it will be associated with a specific SRS and use the spatial relation of the SRS for transmission.

[0148] 5. Unified TCI

[0149] 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.

[0150] Terminal equipment can be configured with two TCI states: DL or joint TCI and UL TCI.

[0151] The UE can configure joint / DL TCI states (up to 128) and UL TCI states (up to 64) at the same time.

[0152] The base station can configure the TCI mode currently used by the UE to be joint mode or separate mode. In the Joint mode, a joint TCI state is indicated to be used for both uplink and downlink transmissions; in the separate mode, the base station needs to indicate the DL TCI state and UL TCI state for uplink and downlink transmissions respectively.

[0153] When the UE receives the TCI state activation signaling indicated by the MAC CE, the activation signaling includes the identification ID of the TCI state, and the UE determines which TCI is activated by the MAC CE according to the RRC configuration.

[0154] 6. mTRP unified TCI framework

[0155] mTRP refers to multiple transmission and reception point, which allows the network to transmit data (service) to a user simultaneously through multiple nodes (multiple antennas, or multiple sites, or multiple transceiver units).

[0156] In a multi-station transmission scenario, the network device needs to indicate multiple common beams to the terminal device for multi-station transmission. Figure 1 As shown, 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 the terminal device receives the two common beams, it 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.

[0157] It should be understood that the transmission in this application may refer to sending or receiving.

[0158] The mTRP scenario is further divided into single DCI (single DCI mTRP, SDCI mTRP) and multiple DCI (multiple DCImTRP, mDCI mTRP). SDCI mTRP means that when there is an ideal backhaul between two nodes that serve a user at the same time (the information interaction delay between the two nodes can be ignored), the two nodes can jointly serve the UE in a very close manner. At this time, one of the two nodes sends DCI to achieve unified / joint scheduling of the UE. At this time, DCI only needs to be sent once, and the DCI will indicate the beam used by the UE to receive data from the two nodes (that is, two beams are used for the two nodes respectively). mDCImTRP means that when there is no ideal backhaul between two nodes (nodes, namely TRPs) that serve a user at the same time (the information interaction delay between the two nodes is large and cannot be ignored), the two nodes cannot jointly serve the UE in a very close manner. At this time, 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, so the resource allocation and beam indication of the two nodes are sent separately via two independent DCIs.

[0159] This application focuses on the SDCI mTRP scenario.

[0160] 7. Timing Advance TA

[0161] There is a delay in signal transmission in space. The farther the terminal is from the network device, the greater the delay of the signal reaching the network device. The distances between different terminals and network devices are different, so the time difference between signals sent by different terminals and reaching the network device is also different. In this way, when the terminal receives the downlink information sent by the network device and then sends the uplink signal, it will arrive at the network device at different times. In order to ensure the orthogonality of uplink transmission and avoid intra-cell interference, the terminal uplink transmission needs to be timed ahead relative to the downlink reception.

[0162] In the mTRP (multiple transmission and reception point) scenario, the network is allowed to transmit data (service) 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, multiple sites within a cell), 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 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 devices. At present, 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 device.

[0163] In addition, for non-service cells, the network device does not need to configure all the detailed parameters of the cell to the terminal device, but only needs to configure the relevant information of the SSB (Synchronization Signal and PBCH Block) of the non-service cell to the terminal device. When one site is located in the current service cell but the other site is located in the non-service cell (inter-cell mTRP, multi-site between cells), two TAs can also be maintained between the terminal device and the network device.

[0164] 8. Control Resource Set (CORESET)

[0165] Control Resource Set (CORESET) and Search Space (SS).

[0166] 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.

[0167] The search space may indicate time domain location information of the control channel.

[0168] Exemplarily, CORESET defines the frequency domain resource position of the resource block and the symbol length occupied by the resource block in the time domain. The search space defines the position 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 from the above, CORESER defines the time-frequency size of the resource block; CORESER and the search space jointly define the time-frequency information of the resource block.

[0169] It should be noted that the time domain information and frequency domain information of the resource block defined by the CORESET and the search space together correspond to the time domain information and frequency domain information of the resources occupied by the control channel.

[0170] The control channel mentioned in this article refers to the Physical Downlink Control Channel (PDCCH).

[0171] 9. Beam failure recovery

[0172] For the mTRP scenario, there are two existing beam failure recovery mechanisms, namely cell-level beam failure recovery and TRP-level beam failure recovery.

[0173] When the terminal device configures only one beam failure detection reference signal set (BFD-RS set) and one candidate beam set for each partial bandwidth (Bandwidth Part, BWP) of each cell, the beam failure detection set consists of one or more periodic CSI-RS, and the candidate beam set consists of one or more periodic CSI-RS or SSB. 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.

[0174] 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 set and the candidate beam set are associated one by 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 the 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.

[0175] 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.

[0176] The network device can configure the TCI state to be associated with one of the 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.

[0177] When a beam failure occurs in a terminal device, the terminal device can determine a new beam (i.e., an SSB or CSI-RS in the candidate beam set), and the terminal device can refer to the RS for uplink and downlink transmission before the new TCI state is indicated. However, the RS is not associated with a TA, so before the new TCI state is indicated, the terminal device cannot determine which TA to use for uplink transmission.

[0178] The present application provides a variety of communication determination methods, which can determine the TA for uplink transmission before the terminal device receives a new TCI state indication.

[0179] 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.

[0180] In the description of the embodiments of the present application, unless otherwise specified, "multiple" or "multiple" means two or more. In addition, "at least one" can be replaced by "one or more".

[0181] The ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the size, content, order, timing, priority or importance of multiple objects. For example, the first indication information and the second indication information can be the same information or different information, and such a name does not indicate the difference 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 the present application is only for distinguishing different steps, and is not used to limit the order of the steps.

[0182] The technical solution provided in the embodiment of the present application can be applied to wireless communication between communication devices. Wireless communication between communication devices may include: wireless communication between network devices and terminals, wireless communication between network devices and network devices, and wireless communication between terminals. In the embodiment of the present application, the term "wireless communication" may also be referred to as "communication", and the term "communication" may also be described as "data transmission", "information transmission" or "transmission".

[0183] 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 to limit the names of various nodes and messages. On the contrary, any name that has the same or similar function as the node or message used in this application is regarded as the method of this application or an equivalent replacement, and is within the scope of protection of this application, and will not be repeated below.

[0184] The various communication methods provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0185] It should be understood that the step numbers in the embodiments of the present application are only used for illustration and do not limit the order in which the steps occur.

[0186] Figure 2 A communication method 200 provided by the present application is shown, and the method 200 is applicable to a scenario of cell-level beam failure recovery. Figure 2 The method includes at least part of the following contents.

[0187] S201, the network device sends configuration information to the terminal device.

[0188] The network device sends RRC (Radio resource control) configuration information to the terminal device.

[0189] For the scenario of cell-level beam failure recovery, 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 relationship between beam indication information (TCI state / spatial relation) and TA or timing advance group (TAG) TAG (i.e., an example of a first association relationship), random access information of beam failure, etc. The random access information of beam failure may include one or more of a preamble sequence, a random access opportunity (RACH occasion), an association relationship between SSB and RACH occasion, etc.

[0190] Among them, 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 the cells in each TAG group use the TA value. When a cell corresponds to a TAG (the correspondence between the cell and the TAG is configured by the network device for the terminal device), the uplink transmission with the cell uses the TA corresponding to the TAG.

[0191] In the present application, the beam indication information may be any one of the transmission configuration indication state TCI state, spatial relation spatial relation, uplink transmission configuration indication state UL TCI state, common transmission configuration indication state jointTCI state, and downlink transmission configuration indication state DL TCI state, and the present application does not limit this.

[0192] 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.

[0193] S202, the terminal device triggers the beam failure recovery process.

[0194] 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 the terminal device detects that the quality of all RSs in the beam failure detection reference signal set is lower than the preset threshold of link failure for N consecutive times, and then it is considered that a beam failure has occurred in the terminal. N can be a positive integer greater than 1 configured by the network device. The preset threshold of link failure can be a signal strength threshold configured by the network device. When the network device only displays the configuration of a beam failure detection reference signal set, the beam failure recovery can be called a cell-level beam failure recovery scenario.

[0195] In one possible implementation, the serving cell with beam failure is a primary cell (Pcell) or a primary secondary cell (PSCell), and the network device configures non-contention-free random access (CFRA) resources for beam failure recovery for the serving cell.

[0196] In this case, the terminal device performs beam failure recovery based on CFRA. The main process is as follows:

[0197] 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-competition-based random access request information for beam failure recovery to the network device, for example, using the CFRA resource associated with the new beam to send a random access pilot, carried in the physical random access channel (PRACH). The beam recovery condition can be understood as that 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.

[0198] When the network device receives the non-competition-based random access request information for beam failure recovery sent by the terminal device, the network device sends a beam failure recovery success response information to the terminal device. The beam failure recovery success response information is carried on the PDCCH, and the CORESET of the PDCCH is monitored and associated with the search space set corresponding to the recovery search space identifier recoverySearchSpaceId.

[0199] 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, indicating that the beam failure is recovered successfully, and the beam recovery success response information is carried in the PDCCH.

[0200] 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.

[0201] 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:

[0202] 1) The terminal device sends the first message Msg1 to the network device (Msg1 is mainly random pilot information, carried on PRACH);

[0203] 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);

[0204] 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 unique identifier of the user);

[0205] 4) After receiving Msg3 sent by the terminal device, the network device sends the fourth information Msg4 to the terminal device (Msg4 is carried in PDCCH and PDSCH, mainly carrying contention resolution information, indicating random access contention resolution).

[0206] When the terminal device receives Msg4 sent by the network device, it indicates that the beam failure is recovered successfully.

[0207] In another possible implementation, the serving cell with beam failure is a Pcell or a 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:

[0208] 1) The terminal device sends MsgA to the network device (MsgA is carried on PRACH and PUSCH and mainly sends random access pilot information);

[0209] 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)

[0210] 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.

[0211] 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 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 the present application takes two beam failure detection reference signals as an example.

[0212] 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 CORESETPoolIndex i 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 MACCE or enhanced BFR MAC CE. This beam failure recovery can also be called a TRP-level beam failure recovery scenario.

[0213] 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.

[0214] When the terminal device detects that both beam failure detection reference signal sets fail in the secondary cell (scell), if there are uplink resources of other cells used to send beam failure recovery requests, the cell ID of the beam failure and the new beam information are carried in the uplink resources through BFR MACCE or enhanced BFR MAC CE; if there are no uplink resources of other cells used to send beam failure recovery requests, a special uplink scheduling request for beam failure recovery is sent. When the network device sends uplink scheduling, the terminal device sends the cell ID of the beam failure and the new beam information through BFR MAC CE or enhanced BFR MAC CE. In both cases, when the terminal device receives the DCI of the network device, and the automatic hybrid repeat request HARQ ID in the DCI is the same as the HARQ ID of the scheduling MAC CE, and the NDI is flipped, it means that the beam failure recovery is successful.

[0215] S203, the terminal device determines the TA for uplink transmission.

[0216] When the terminal device beam failure is successfully recovered, but before new beam indication information is indicated, the terminal device can determine the first TA for uplink transmission according to any one of the following methods.

[0217] Method 1

[0218] 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.

[0219] Specifically, when a beam failure occurs in a terminal device, the terminal device determines a first reference signal (which may be referred to as q new ), the first reference signal is a reference signal corresponding to a new beam after the terminal device recovers from a beam failure. 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 a 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.

[0220] 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 one or more TCI states, thereby determining the one or more TCI states, and 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.

[0221] 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.

[0222] 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.

[0223] 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, 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.

[0224] For example, QCL-typeD is q new There are multiple TCI states, and a default rule can be used to determine a TCIstate, 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.

[0225] The present 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.

[0226] For example, when the terminal device operates in the joint unified TCI mode, the terminal device determines that the reference signal of the QCL type is typeD as 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.

[0227] 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.

[0228] Method 2

[0229] 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.

[0230] Specifically, in a possible implementation manner, the terminal device performs beam failure recovery based on CFRA.

[0231] 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, and the beam recovery success response message includes a 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 failure is recovered.

[0232] 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:

[0233] The first indication information indicates a TAG id;

[0234] The first indication information may be a field with a length of 1 bit, indicating which TA is specifically used after the beam failure is restored. 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 restored 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 restored or indicates the second TA or TAG of the serving cell, and vice versa.

[0235] The first indication information may be used to indicate that the first TA value is 0.

[0236] In another possible implementation manner, the terminal device performs beam failure recovery based on CBRA.

[0237] In this case, the terminal device sends a contention-based random access request information 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, and the first TA is used for uplink transmission after the terminal device recovers from beam failure.

[0238] 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.

[0239] 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, refer 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 may be any one or more of the following:

[0240] The first indication information indicates a TAG id;

[0241] The first indication information may be a field with a length of 1 bit, indicating which TA is specifically used after the beam failure is restored. 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 restored 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 restored or indicates the second TA or TAG of the serving cell, and vice versa.

[0242] The first indication information may be used to indicate that the first TA value is 0.

[0243] 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.

[0244] 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, and MsgB includes first indication information, and the first indication information is used to indicate the first TA, and the first TA is used for uplink transmission after the terminal device recovers from beam failure.

[0245] Specifically, the first indication information may 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 may contain the first indication information. Optionally, the network device also sends RAR signaling, and the RARA 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.

[0246] The first indication information may be any one or more of the following:

[0247] The first indication information indicates a TAG id;

[0248] The first indication information may be a field with a length of 1 bit, indicating which TA is specifically used after the beam failure is restored. 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 restored 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 restored or indicates the second TA or TAG of the serving cell, and vice versa.

[0249] The first indication information may be used to indicate that the first TA value is 0.

[0250] Method 3

[0251] The network device configures the association relationship between the reference signal and the TA in the first candidate beam reference signal set (ie, the second association relationship) 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 reference signal and the TA or TAG.

[0252] 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 according to a second association relationship, and the first TA is a TA corresponding to the first reference signal.

[0253] 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.

[0254] The second association relationship can be any one or more of the following:

[0255] 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;

[0256] When the network device configures two TAs for a service cell of the terminal device, the second association may be a direct configuration or an indication of whether each reference signal of the first candidate beam reference signal set is associated with the first TA or the second TA.

[0257] 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 stipulates 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 TAGid of the cell; or, the protocol stipulates a rule that the first X RSs are associated with the first TA, and the last Y RSs are associated with the second TA.

[0258] 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.

[0259] When one of the beam failure detection reference signal sets of the terminal device fails, and when the beam failure recovery of the set is successful, but before a new beam indication is made, the terminal device can determine the TA for uplink transmission according to any one of the following methods.

[0260] Method 4

[0261] The network device configures the association relationship between the beam failure detection reference signal set and TAG / TA (i.e., the third association relationship), and determines the first TA of uplink transmission through the association relationship between the beam failure detection reference signal set and TAG / TA.

[0262] 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 for the first beam failure detection set and then uses the first TA for uplink transmission.

[0263] 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 may be any one or more of the following:

[0264] The third association relationship can be an association relationship between each beam failure detection reference signal set and the 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.

[0265] 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.

[0266] 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.

[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 the first TA. Then the terminal device can consider that the other beam failure detection reference signal set is associated with the second TA.

[0268] The third association relationship may be an association relationship between each reference signal in each beam failure detection reference signal set and the TAGid or the first TA or the second TA.

[0269] 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. When a beam failure occurs in the terminal device, the terminal device determines the first reference signal, and the first reference signal belongs to the first candidate beam reference signal set. The terminal uses the first TA for uplink transmission.

[0270] The fourth association relationship is an association relationship between at least one candidate beam reference signal set and the TA. The fourth association relationship may be any one or more of the following:

[0271] The fourth association relationship can be an association relationship between each 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. 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.

[0272] 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.

[0273] 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.

[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 the first TA. Then the terminal device can consider that the other candidate beam reference signal set is associated with the second TA.

[0275] 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.

[0276] 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.

[0277] 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 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.

[0278] 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 relationship between a beam failure detection reference signal set and a candidate beam reference signal set.

[0279] 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 according to the fifth association relationship, and the terminal device determines that the first candidate beam reference signal set is associated with the first TA according to the third association relationship, then the terminal device determines the first TA.

[0280] In a possible implementation, the network device may indicate TAG or TA information through BFD-RS Indication MAC CE signaling. BFD-RS Indication MAC CE is used to activate the BFD-RS in the beam failure detection reference signal set, where 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. Set1 and Set2 correspond to the first and second beam failure detection reference signal sets, respectively.

[0281] Optionally, each BFD-RS is associated with a TA. Then, in the BFD-RS Indication MAC CE signaling, a TAG id or an identifier is indicated for each activated BFD-RS, and the identifier is used to indicate the first TA or the second TA.

[0282] Specifically, Figure 3As shown, one of the "R" fields before each BFD-RS is used to indicate a specific TA. When the 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 the BFD-RS ID0 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 the BFD-RS ID0 is the second TA, and vice versa. For another example, if the first "R" field or the second "R" field before the second BFD-RS ID0 of Set1 is used to indicate a TA, when the first "R" field or the second "R" field is 0, it indicates that the TA corresponding to the BFD-RS ID1 is the first TA, and when the first "R" field is 1 or the second "R" field, it indicates that the TA corresponding to the BFD-RS ID1 is the second TA, and vice versa.

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

[0284] Specifically, Figure 3 As shown, 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 is the second TA, and vice versa. For example, if the "R" field before the first BFD-RS ID0 of Set1 is 0, it means 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 means 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.

[0285] Optionally, the first "R" field in the signaling indicates that a specified TA is used after the beam failure of 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 and 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 and 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 and Set2, the TA used for uplink transmission after the beam failure is recovered is 0, and vice versa.

[0286] Method 5

[0287] 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, after 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.

[0288] Specifically, in a 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 CORESETPoolIndex i 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 CORESETPoolIndex i is used.

[0289] 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 RS of the TCI state 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.

[0290] 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.

[0291] Method 6

[0292] When the terminal device recovers from beam failure, the terminal device 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.

[0293] When the terminal device works under the Unified TCI framework, after the terminal device 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 the 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 occurs in the terminal device.

[0294] Specifically, before a beam failure occurs in the terminal device, the third beam indication information is used for uplink transmission, and 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, and the TA used for uplink transmission through the first reference signal is the first TA.

[0295] It should be understood that before the terminal device 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.

[0296] Optionally, when two TAs are configured for each serving cell of the terminal device, it may be possible to limit the terminal device to not expect to configure cell-level beam failure recovery;

[0297] 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.

[0298] For the above method 200, the terminal device determines the first TA in the above manner, and the first TA may be valid in a first time period.

[0299] The starting time of the first time period is the first time, which is any one of the following times:

[0300] The time after the first duration of successful recovery of the terminal equipment beam failure;

[0301] The moment after the second time duration when the terminal device receives the beam recovery success response information;

[0302] The terminal device performs beam failure recovery based on contention-based random access, and the time after the terminal device receives a contention resolution message for a third period of time;

[0303] The time when the terminal device is 28 symbols after the last symbol in the first physical downlink control channel PDCCH received in the recovery spatial search set;

[0304] The time after the fifth duration of the terminal device sending the first beam failure recovery media access control unit BFR MAC CE;

[0305] 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.

[0306] 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:

[0307] The moment after the fourth time duration after the terminal device receives the DCI signaling indicating the new beam indication information;

[0308] A moment five time interval 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 the DCI signaling for beam indication;

[0309] 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;

[0310] 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.

[0311] Figure 4 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, and the processing unit 420 is used for data processing. The transceiver unit 410 can also be called a communication interface or a communication unit.

[0312] In a possible implementation, the device 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.

[0313] 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.

[0314] 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 in 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.

[0315] like Figure 5 As shown, the embodiment of the present application further provides a communication device 500. The communication device 500 includes a processor 510, the processor 510 is coupled to a memory 520, the memory 520 is used to store computer programs or instructions or and / or data, and 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.

[0316] In a possible implementation, the communication device 500 includes one or more processors 510.

[0317] In one possible implementation, Figure 5 As shown, the communication device 500 may further include a memory 7520 .

[0318] In a possible implementation, the communication device 500 may include one or more memories 520 .

[0319] In a possible implementation, the memory 520 may be integrated with the processor 510 or provided separately.

[0320] In one possible implementation, Figure 5 As shown, the wireless communication device 500 may further include a transceiver 530, which is used to receive and / or send signals. For example, the processor 510 is used to control the transceiver 530 to receive and / or send signals.

[0321] As a solution, the communication device 500 is used to implement the operations performed by the base station in the above method embodiment.

[0322] 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 transceiver-related operations performed by the base station in the above method embodiment.

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

[0324] 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.

[0325] 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 method embodiment. When the communication device 600 is a terminal device, Figure 6 A simplified schematic diagram of the structure of a terminal device is shown. For ease of understanding and illustration, Figure 6 In the example, a mobile phone is used as the terminal device. Figure 6 As shown, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device. The processor is mainly used to process communication protocols and communication data, as well as to control the terminal device, execute software programs, process software program data, etc. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for conversion between baseband signals and radio frequency signals and processing of radio frequency signals. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input-output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input-output devices.

[0326] When data needs to be sent, the processor performs baseband processing on the data to be sent and 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, Figure 6 Only one memory and processor are shown in the figure. 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. The memory may be set independently of the processor or integrated with the processor, and the embodiments of the present application do not limit this.

[0327] In the embodiment of the present application, the antenna and the 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.

[0328] like Figure 6 As shown, the terminal device includes a transceiver unit 610 and a processing unit 620. The transceiver unit 610 may also be referred to as a transceiver, a transceiver, a transceiver device, etc. The processing unit 620 may also be referred to as a processor, a processing board, a processing module, a processing device, etc.

[0329] In a possible implementation, the device for implementing the receiving function in the transceiver unit 610 may be regarded as a receiving unit, and the device for implementing the sending function in the transceiver unit 610 may be regarded as a sending unit, that is, the transceiver unit 610 includes a receiving unit and a sending 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 sending unit may also be sometimes referred to as a transmitter, a transmitter, or a transmitting circuit.

[0330] For example, in one implementation, the transceiver unit 610 is used to perform a receiving operation of the terminal device. The processing unit 620 is used to perform a processing action on the terminal device side.

[0331] It should be understood that Figure 6 This is only an example and not a limitation. The terminal device including the transceiver unit and the processing unit may not rely on Figure 6 The structure shown.

[0332] 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 or a microprocessor or an 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, and various logic circuits. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be output to a transmitter and transmitted by the transmitter, for example, but not limited to, and the input circuit and the output circuit may be different circuits or the same circuit. In this case, the circuit is used as an input circuit and an output circuit at different times.

[0333] The embodiment of the present application further provides a communication device 700, which can be a base station or a chip. The communication device 700 can be used to execute the operations executed by the base station in the above method embodiment.

[0334] When the communication device 700 is a base station. Figure 7 A simplified schematic diagram of the base station structure is shown. The base station includes a part 710 and a part 720. The part 710 is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals into baseband signals; the part 720 is mainly used for baseband processing, controlling the base station, etc. The part 710 can generally be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc. The part 720 is generally the control center of the base station, which can generally be referred to as a processing unit, and is used to control the base station to perform the processing operations on the network device side in the above method embodiment.

[0335] The transceiver unit of part 710 may also be referred to as a transceiver or a transceiver, etc., and includes an antenna and a radio frequency circuit, wherein the radio frequency circuit is mainly used for radio frequency processing. In a possible implementation, the device used to implement the receiving function in part 710 may be regarded as a receiving unit, and the device used to implement the sending function may be regarded as a sending unit, that is, part 710 includes a receiving unit and a sending unit. The receiving unit may also be referred to as a receiver, a receiver, or a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0336] Part 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 of the base station. If there are multiple boards, each board can be interconnected to enhance processing capabilities. As an optional implementation, multiple boards may share one or more processors, or multiple boards may share one or more memories, or multiple boards may share one or more processors at the same time.

[0337] 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.

[0338] It should be understood that Figure 7 This is only an example and not a limitation. The network device including the transceiver unit and the processing unit may not rely on Figure 7 The structure shown.

[0339] 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 or a microprocessor or an 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, and various logic circuits. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be output to a transmitter and transmitted by the transmitter, for example, but not limited to, and the input circuit and the output circuit may be different circuits or the same circuit. In this case, the circuit is used as an input circuit and an output circuit at different times.

[0340] An embodiment of the present application also provides a computer-readable storage medium on which computer instructions for implementing the method executed by a terminal device or a base station in the above method embodiment are stored.

[0341] 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.

[0342] 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 a method executed by a network device in the above method embodiment.

[0343] An embodiment of the present application also provides a communication system, which includes the base station and terminal equipment in the above embodiment.

[0344] The explanation of the relevant contents and beneficial effects in any of the wireless communication devices provided above can refer to the corresponding method embodiments provided above, and will not be repeated here.

[0345] In an embodiment of the present application, a terminal device or a 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. Among them, the hardware layer may include hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called 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 Linux operating system, Unix operating system, Android operating system, iOS operating system, or Windows operating system. The application layer may include applications such as browsers, address books, word processing software, and instant messaging software.

[0346] The embodiments of the present application do not specifically 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. 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 the base station that can call and execute a program.

[0347] Various aspects or features of the embodiments of the present application may be implemented as methods, devices, or products using standard programming and / or engineering techniques. The term "product" as used herein may cover a computer program accessible from any computer-readable device, carrier, or medium. For example, a computer-readable medium may include, but is not limited to: a magnetic storage device (e.g., a hard disk, a floppy disk, or a magnetic tape, etc.), an optical disk (e.g., a compact disc (CD), a digital versatile disc (DVD), etc.), a smart card, and a flash memory device (e.g., an erasable programmable read-only memory (EPROM), a card, a stick, or a key drive, etc.).

[0348] 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.

[0349] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or 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. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0350] 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).

[0351] 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.

[0352] 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.

[0353] Those of ordinary skill 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 the present application.

[0354] Those skilled in the art can 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.

[0355] 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 only 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.

[0356] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0357] 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.

[0358] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially 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, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program code.

[0359] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the embodiments of the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. 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 timing advance 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.

2. The method according to claim 1, 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.

3. The method according to claim 1 or 2, 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.

4. The method according to any one of claims 1 to 3, characterized in that The first association relationship is configured by a network device.

5. The method according to any one of claims 2 to 4, 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.

6. The method according to any one of claims 1 to 5, 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.

7. The method according to claim 6, 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.

8. 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 timing advance 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 physical downlink control channel 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, 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.

9. The method according to claim 8, 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.

10. The method according to claim 8 or 9, 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 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.

11. The method according to claim 10, 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.

12. 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.

13. The method according to claim 12, 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 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.

14. The method according to claim 13, 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.

15. 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 timing advance 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 physical downlink control channel 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.

16. The method according to claim 15, 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.

17. A communication device, characterized in that: include: A unit for implementing the method of any one of claims 1 to 7; or, a unit for implementing the method of any one of claims 8 to 11; or, a unit for implementing the method of any one of claims 12 to 14.

18. 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 7, or Execute the method according to any one of claims 8 to 11, or Execute the method as claimed in any one of claims 12 to 14.

19. 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 7; or Performing the method according to any one of claims 8 to 11; or Execute the method as claimed in any one of claims 12 to 14.

20. 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 8 to 11, and the network device is used to execute the method according to claim 15 or 16.

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