Beam indication method, device, and communication apparatus

Abstract

To provide a beam indication method, device, and communication apparatus capable of indicating a reception beam for instruction information transmitted by a medium access control layer (MAC) or downlink control information (DCI).SOLUTION: A method includes a step in which a terminal apparatus receives first instruction information using a first reception beam and determines a second reception beam to be used for communication between a subsequent terminal apparatus and a network apparatus. The first reception beam corresponds to a first transmission and reception point (TRP) or a second TRP. By determining the second reception beam corresponding to the second TRP on the basis of the first instruction information, the terminal apparatus receives indication signaling using the second reception beam when receiving the indication signaling transmitted by the subsequent network apparatus using the second TRP, thereby enabling indication of the reception beam during communication and improving the success rate of signaling reception.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communication technologies, and particularly to a beam indication method, apparatus, and communication device.

Background Art

[0002] In New Radio (NR), especially when the frequency band is in Frequency Range (FR) 2, since the high-frequency channel has fast attenuation, it is necessary to use beam-based transmission and reception to ensure coverage.

[0003] In Rel-16, dedicated beams such as the physical downlink control channel (PDCCH), physical downlink shared channel (PDSCH), physical uplink shared channel (PUSCH), physical uplink control channel (PUCCH), and each uplink and downlink reference signal are independently indicated, resulting in a large signaling overhead. Therefore, in order to reduce the signaling overhead, a common beam can be used, that is, one common beam can be indicated for a plurality of channels and / or reference signals. For example, it is a common beam shared by at least two channels or at least two reference signals.

[0004] However, how to indicate the transmission or reception of a beam during communication becomes an issue to be solved.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The beam indication method, apparatus, and communication device proposed by the present disclosure are for solving the technical problem that the indication information transmitted by MAC or DCI cannot indicate the receiving beam of this indication information.

Means for Solving the Problem

[0006] The beam indication method proposed by an embodiment of one aspect of the present disclosure is applied to a terminal device, and includes the step of receiving, using a first receiving beam, first indication information transmitted from a network device, where the first indication information includes the step of indicating a second receiving beam, and here, the first receiving beam corresponds to a first transmission and reception point (TRP) or a second TRP, and the second receiving beam corresponds to the second TRP.

[0007] Optionally, the first receiving beam corresponds to the first TRP, and the second receiving beam corresponds to the initial beam of the second TRP.

[0008] Optionally, the first indication information is a control element (MAC CE) of a first media access control layer, and here, the first MAC CE indicates an identifier of a first control resource set related to the second TRP and one transmission configuration indication (TCI) state index corresponding to the initial beam of the second TRP, and the initial beam of the second TRP corresponds to the first control resource set.

[0009] Optionally, the first indication information is a second MAC CE and a first downlink control information (DCI), and here, the second MAC CE indicates a plurality of activated TCI state indexes, and the first DCI indicates one TCI state index corresponding to the initial beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the second MAC CE.

[0010] Optionally, the first reception beam corresponds to a first TRP, the second reception beam corresponds to an updated beam of a second TRP, or the first reception beam corresponds to the second TRP, and the second reception beam corresponds to an updated beam of the second TRP.

[0011] Optionally, the first indication information is a third MAC CE, where the third MAC CE indicates an identifier of a second control resource set related to the second TRP and one TCI state index corresponding to the updated beam of the second TRP, and the updated beam of the second TRP corresponds to the second control resource set.

[0012] Optionally, the first indication information is a fourth MAC CE and a second DCI, where the fourth MAC CE indicates a plurality of activated TCI state indexes, the second DCI indicates one TCI state index corresponding to the updated beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the fourth MAC CE.

[0013] Optionally, the plurality of activated TCI state indexes carried in the fourth MAC CE includes one TCI state index corresponding to the initial beam of the second TRP.

[0014] Optionally, the first DCI and the second DCI include a target indication field for indicating an identifier of a TRP corresponding to the TCI state index and / or a corresponding control resource set pool index.

[0015] Optionally, in the first DCI and the second DCI, each of the TCI state indexes corresponds to an identifier of one preset TRP and / or one control resource set pool index.

[0016] Optionally, the identifier of the TRP corresponding to the TCI state index in the first DCI and the second DCI and / or the corresponding control resource set pool index are the TRP identifier and / or the control resource set pool index indicated by the MAC CE that activates the TCI state index.

[0017] Optionally, the method further includes determining the first reception beam, where the first reception beam is the initial reception beam of the control resource set CORESET#0 related to the first TRP.

[0018] Optionally, the method further includes receiving second indication information using a known reception beam corresponding to the first TRP, where the second indication information is for determining the first reception beam.

[0019] Optionally, the known reception beam corresponds to CORESET#0 related to the first TRP, or the known reception beam corresponds to a third control resource set related to the first TRP and is indicated by third indication information transmitted by CORESET#0 related to the first TRP.

[0020] Optionally, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes one or more TCI state indexes corresponding to the identifier of one TRP, or one or more TCI state indexes corresponding to one control resource set pool index.

[0021] Optionally, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE is a plurality of TCI state indexes corresponding to identifiers of a plurality of TRPs, where each TCI state index has an identifier of the corresponding TRP, or a plurality of TCI state indexes corresponding to a plurality of control resource set pool indexes, where each TCI state index has a control resource set pool index of the corresponding TCI state index.

[0022] Optionally, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes an indication field corresponding to at least one TCI state index, and the indication field indicates whether the at least one TCI state index exists in the at least one MAC CE.

[0023] Another beam indication method proposed by an embodiment of another aspect of the present disclosure is applied to a network device and includes a step of transmitting first indication information to a terminal device using a first transmission beam, where the first indication information indicates a second reception beam of the terminal device, the first transmission beam corresponds to a first reception beam of the terminal device, the first reception beam corresponds to a first transmission and reception point (TRP) or a second TRP, and the second reception beam corresponds to the second TRP.

[0024] Optionally, the first reception beam is a beam of the first TRP, and the second reception beam is an initial beam of the second TRP.

[0025] Optionally, the first indication information is a control element (MAC CE) of a first media access control layer, where the first MAC CE indicates an identifier of a first control resource set related to the second TRP and one transmission configuration indication (TCI) state index corresponding to an initial beam of the second TRP, and the initial beam of the second TRP corresponds to the first control resource set.

[0026] Optionally, the first indication information is a second MAC CE and a first downlink control information (DCI), where the second MAC CE indicates a plurality of activated TCI state indexes, and the first DCI indicates one TCI state index corresponding to an initial beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the second MAC CE.

[0027] Optionally, the first received beam corresponds to a beam of the first TRP, the second received beam corresponds to an updated beam of the second TRP, or the first received beam corresponds to a beam of the second TRP, and the second received beam corresponds to an updated beam of the second TRP.

[0028] Optionally, the first indication information is a third MAC CE, where the third MAC CE indicates an identifier of a second control resource set related to the second TRP and one TCI state index corresponding to an updated beam of the second TRP, and the updated beam of the second TRP corresponds to the second control resource set.

[0029] Optionally, the first indication information is a fourth MAC CE and a second DCI, where the fourth MAC CE indicates a plurality of activated TCI state indexes, and the second DCI indicates one TCI state index corresponding to the updated beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the fourth MAC CE.

[0030] Optionally, among the plurality of TCI state indexes carried by the fourth MAC CE, one TCI state index corresponding to the initial beam of the second TRP is included.

[0031] Optionally, the first DCI and the second DCI include a target indication field for indicating an identifier of a TRP corresponding to a TCI state index and / or a corresponding control resource set pool index.

[0032] Optionally, in the first DCI and the second DCI, each TCI state index corresponds to a preset identifier of one TRP and / or one control resource set pool index.

[0033] Optionally, the identifier of the TRP corresponding to the TCI state index in the first DCI and the second DCI and / or the corresponding control resource set pool index are the TRP identifier and / or the control resource set pool index indicated by the MAC CE that activates the TCI state index.

[0034] Optionally, the first reception beam is an initial reception beam corresponding to the control resource set CORESET#0 related to the first TRP.

[0035] Optionally, the method further includes transmitting second indication information to the terminal device by using a transmission beam corresponding to a known reception beam of the terminal device, where the second indication information indicates the first reception beam of the terminal device, and the known reception beam corresponds to the first TRP.

[0036] Optionally, the known reception beam corresponds to CORESET#0 associated with the first TRP, or the known reception beam corresponds to a third control resource set associated with the first TRP, and is indicated by third indication information transmitted by CORESET#0 associated with the first TRP.

[0037] Optionally, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes one or more TCI state indexes corresponding to an identifier of one TRP, or one or more TCI state indexes corresponding to one control resource set pool index.

[0038] Optionally, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE is a plurality of TCI state indexes corresponding to identifiers of a plurality of TRPs, where each TCI state index has an identifier of the corresponding TRP, or a plurality of TCI state indexes corresponding to a plurality of control resource set pool indexes, where each TCI state index has a control resource set pool index of the corresponding TCI state index.

[0039] Optionally, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes an indication field corresponding to at least one TCI state index, and the indication field indicates whether the at least one TCI state index exists in the at least one MAC CE.

[0040] The beam indication device proposed by an embodiment of one aspect of the present disclosure is a receiving module applied to a terminal device for receiving first indication information transmitted from a network device using a first receiving beam, where the first indication information includes a receiving module for indicating a second receiving beam, and here, the first receiving beam corresponds to a first transmission and reception point (TRP) or a second TRP, and the second receiving beam corresponds to the second TRP.

[0041] In a possible implementation form, the first receiving beam corresponds to the first TRP, and the second receiving beam corresponds to the initial beam of the second TRP.

[0042] In a possible implementation form, the first indication information is a control element (MAC CE) of a first media access control layer, where the first MAC CE indicates an identifier of a first control resource set related to the second TRP and one transmission configuration indication (TCI) state index corresponding to the initial beam of the second TRP, and the initial beam of the second TRP corresponds to the first control resource set.

[0043] As a possible implementation form, the first indication information is the second MAC CE and the first downlink control information (DCI), where the second MAC CE indicates a plurality of activated TCI state indexes, and the first DCI indicates one TCI state index corresponding to the initial beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the second MAC CE.

[0044] As a possible implementation form, the first reception beam corresponds to the first TRP, the second reception beam corresponds to the updated beam of the second TRP, or the first reception beam corresponds to the second TRP, and the second reception beam corresponds to the updated beam of the second TRP.

[0045] As a possible implementation form, the first indication information is the third MAC CE, where the third MAC CE indicates an identifier of a second control resource set related to the second TRP and one TCI state index corresponding to the updated beam of the second TRP, and the updated beam of the second TRP corresponds to the second control resource set.

[0046] As a possible implementation form, the first indication information is the fourth MAC CE and the second DCI, where the fourth MAC CE indicates a plurality of activated TCI state indexes, and the second DCI indicates one TCI state index corresponding to the updated beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the fourth MAC CE.

[0047] As a possible implementation form, the plurality of activated TCI state indexes carried by the fourth MAC CE includes one TCI state index corresponding to the initial beam of the second TRP.

[0048] In one possible implementation, the first DCI and the second DCI include a target indication field for indicating an identifier of a TRP corresponding to a TCI state index and / or a corresponding control resource set pool index.

[0049] In one possible implementation, in the first DCI and the second DCI, each TCI state index corresponds to an identifier of one preset TRP and / or corresponds to one control resource set pool index.

[0050] In one possible implementation, the identifier of the TRP corresponding to the TCI state index in the first DCI and the second DCI and / or the corresponding control resource set pool index are the TRP identifier and / or the control resource set pool index indicated by the MAC CE that activates the TCI state index.

[0051] In one possible implementation, the apparatus further includes a determination module for determining the first reception beam, where the first reception beam is an initial reception beam of a control resource set CORESET#0 related to the first TRP.

[0052] In one possible implementation, the reception module further receives second indication information using a known reception beam corresponding to the first TRP, and the second indication information is for determining the first reception beam.

[0053] In one possible implementation, the known reception beam is a reception beam of CORESET#0 related to the first TRP, or the known reception beam is determined based on third indication information transmitted by CORESET#0 related to the first TRP, and is a reception beam corresponding to a third control resource set related to the first TRP.

[0054] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes one or more TCI state indexes corresponding to an identifier of one TRP, or one or more TCI state indexes corresponding to an index of one control resource set pool.

[0055] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE is a plurality of TCI state indexes corresponding to identifiers of a plurality of TRPs, where each TCI state index has an identifier of the corresponding TRP, or a plurality of TCI state indexes corresponding to indexes of a plurality of control resource set pools, where each TCI state index has an index of the corresponding control resource set pool.

[0056] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes an indication field corresponding to at least one TCI state index, and the indication field indicates whether the at least one TCI state index exists in the at least one MAC CE.

[0057] Another beam indication device proposed by an embodiment of another aspect of the present disclosure is applied to a network device and includes a transmission module for transmitting first indication information to a terminal device using a first transmission beam, where the first indication information indicates a second reception beam of the terminal device, the first transmission beam corresponds to a first reception beam of the terminal device, the first reception beam corresponds to a first transmission and reception point (TRP) or a second TRP, and the second reception beam corresponds to the second TRP.

[0058] As a possible implementation form, the first received beam corresponds to the first TRP, and the second received beam corresponds to the initial beam of the second TRP.

[0059] As a possible implementation form, the first indication information is a control element (MAC CE) of the first media access control layer. Here, the first MAC CE indicates an identifier of a first control resource set related to the second TRP and one transmission configuration indication (TCI) state index corresponding to the initial beam of the second TRP, and the initial beam of the second TRP corresponds to the first control resource set.

[0060] As a possible implementation form, the first indication information is a second MAC CE and a first downlink control information (DCI). Here, the second MAC CE indicates a plurality of activated TCI state indexes, the first DCI indicates one TCI state index corresponding to the initial beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the second MAC CE.

[0061] As a possible implementation form, the first received beam corresponds to the first TRP, the second received beam corresponds to the updated beam of the second TRP, or the first received beam corresponds to the second TRP, and the second received beam corresponds to the updated beam of the second TRP.

[0062] As a possible implementation form, the first indication information is a third MAC CE. Here, the third MAC CE indicates an identifier of a second control resource set related to the second TRP and one TCI state index corresponding to the updated beam of the second TRP, and the updated beam of the second TRP corresponds to the second control resource set.

[0063] In a possible implementation form, the first indication information includes a fourth MAC CE and a second DCI. Here, the fourth MAC CE indicates a plurality of activated TCI state indexes, and the second DCI indicates one TCI state index corresponding to the updated beam of the second TRP. The one TCI state index is one of the plurality of activated TCI state indexes included in the fourth MAC CE.

[0064] In a possible implementation form, among the plurality of TCI state indexes carried in the fourth MAC CE, one TCI state index corresponding to the initial beam of the second TRP is included.

[0065] In a possible implementation form, the first DCI and the second DCI include a target indication field for indicating an identifier of a TRP corresponding to a TCI state index and / or a corresponding control resource set pool index.

[0066] In a possible implementation form, in the first DCI and the second DCI, each TCI state index corresponds to a preset identifier of one TRP and / or a corresponding control resource set pool index.

[0067] In a possible implementation form, the identifier of the TRP corresponding to the TCI state index in the first DCI and the second DCI and / or the corresponding control resource set pool index are the TRP identifier and / or the control resource set pool index indicated by the MAC CE that activates the TCI state index.

[0068] In a possible implementation form, the first reception beam is an initial reception beam corresponding to the control resource set CORESET#0 related to the first TRP.

[0069] As a possible implementation form, the transmission module further uses a transmission beam corresponding to a known reception beam of the terminal device to transmit second indication information to the terminal device, where the second indication information indicates the first reception beam of the terminal device, and the known reception beam corresponds to the first TRP.

[0070] As a possible implementation form, the known reception beam corresponds to CORESET#0 related to the first TRP, or the known reception beam corresponds to a third control resource set related to the first TRP, and is indicated by third indication information transmitted by CORESET#0 related to the first TRP.

[0071] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes one or more TCI state indexes corresponding to an identifier of one TRP, or one or more TCI state indexes corresponding to one control resource set pool index.

[0072] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE is a plurality of TCI state indexes corresponding to identifiers of a plurality of TRPs, where each TCI state index has an identifier of the corresponding TRP, or a plurality of TCI state indexes corresponding to a plurality of control resource set pool indexes, where each TCI state index has a control resource set pool index of the corresponding TCI state index.

[0073] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes an indication field corresponding to at least one TCI state index, and the indication field indicates whether the at least one TCI state index exists in the at least one MAC CE.

[0074] The terminal device proposed by an embodiment of another aspect of the present disclosure includes a transceiver, a memory, and a processor here. The memory stores a computer program. The transceiver transmits and receives data under the control of the processor. The processor reads the computer program in the memory and executes an operation of receiving first indication information transmitted from a network device using a first reception beam. The first indication information indicates a second reception beam. Here, the first reception beam corresponds to a first transmission and reception point (TRP) or a second TRP, and the second reception beam corresponds to the second TRP.

[0075] As a possible implementation form, the first reception beam corresponds to the first TRP, and the second reception beam corresponds to the initial beam of the second TRP.

[0076] As a possible implementation form, the first indication information is a control element (MAC CE) of a first media access control layer. Here, the first MAC CE indicates an identifier of a first control resource set related to the second TRP and one transmission configuration indication (TCI) state index corresponding to the initial beam of the second TRP, and the initial beam of the second TRP corresponds to the first control resource set.

[0077] As a possible implementation form, the first indication information is the second MAC CE and the first downlink control information (DCI), where the second MAC CE indicates a plurality of activated TCI state indexes, and the first DCI indicates one TCI state index corresponding to the initial beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the second MAC CE.

[0078] As a possible implementation form, the first receiving beam corresponds to the first TRP, the second receiving beam corresponds to the updated beam of the second TRP, or the first receiving beam corresponds to the second TRP, and the second receiving beam corresponds to the updated beam of the second TRP.

[0079] As a possible implementation form, the first indication information is the third MAC CE, where the third MAC CE indicates an identifier of a second control resource set related to the second TRP and one TCI state index corresponding to the updated beam of the second TRP, and the updated beam of the second TRP corresponds to the second control resource set.

[0080] As a possible implementation form, the first indication information is the fourth MAC CE and the second DCI, where the fourth MAC CE indicates a plurality of activated TCI state indexes, and the second DCI indicates one TCI state index corresponding to the updated beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the fourth MAC CE.

[0081] As a possible implementation form, the plurality of activated TCI state indexes carried by the fourth MAC CE includes one TCI state index corresponding to the initial beam of the second TRP.

[0082] As a possible implementation form, the first DCI and the second DCI include a target indication field for indicating an identifier of a TRP corresponding to a TCI state index and / or a corresponding control resource set pool index.

[0083] As a possible implementation form, in the first DCI and the second DCI, each TCI state index corresponds to an identifier of one preset TRP and / or corresponds to one control resource set pool index.

[0084] As a possible implementation form, the identifier of the TRP corresponding to the TCI state index in the first DCI and the second DCI and / or the corresponding control resource set pool index are the TRP identifier and / or the control resource set pool index indicated by the MAC CE that activates the TCI state index.

[0085] As a possible implementation form, the processor further executes an operation of determining the first reception beam, where the first reception beam is an initial reception beam of a control resource set CORESET#0 related to the first TRP.

[0086] As a possible implementation form, the processor further executes an operation of receiving second indication information using a known reception beam corresponding to the first TRP, and the second indication information is for determining the first reception beam.

[0087] As a possible implementation form, the known reception beam corresponds to CORESET#0 related to the first TRP, or the known reception beam corresponds to a third control resource set related to the first TRP and is indicated by third indication information transmitted by CORESET#0 related to the first TRP.

[0088] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes one or more TCI state indexes corresponding to the identifier of one TRP, or one or more TCI state indexes corresponding to one control resource set pool index.

[0089] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE is a plurality of TCI state indexes corresponding to the identifiers of a plurality of TRPs, where each TCI state index has the identifier of the corresponding TRP, or a plurality of TCI state indexes corresponding to a plurality of control resource set pool indexes, where each TCI state index has the control resource set pool index corresponding to it.

[0090] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes an indication field corresponding to at least one TCI state index, and the indication field indicates whether the at least one TCI state index exists in the at least one MAC CE.

[0091] An example of another aspect of the present disclosure proposes a network device including a transceiver, a memory, and a processor, where the memory stores a computer program, the transceiver transmits and receives data under the control of the processor, and the processor reads the computer program in the memory and executes an operation of transmitting first instruction information to a terminal device using a first transmission beam. Here, the first instruction information instructs a second reception beam of the terminal device, the first transmission beam corresponds to a first reception beam of the terminal device, the first reception beam corresponds to a first transmission and reception point (TRP) or a second TRP, and the second reception beam corresponds to the second TRP.

[0092] In a possible implementation form, the first reception beam corresponds to the first TRP, and the second reception beam corresponds to an initial beam of the second TRP.

[0093] In a possible implementation form, the first instruction information is a control element (MAC CE) of a first media access control layer. Here, the first MAC CE instructs an identifier of a first control resource set related to the second TRP and one transmission configuration indication (TCI) state index corresponding to the initial beam of the second TRP, and the initial beam of the second TRP corresponds to the first control resource set.

[0094] In a possible implementation form, the first instruction information is a second MAC CE and a first downlink control information (DCI). Here, the second MAC CE instructs a plurality of activated TCI state indexes, the first DCI instructs one TCI state index corresponding to the initial beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the second MAC CE.

[0095] As a possible implementation form, the first received beam corresponds to the first TRP, the second received beam corresponds to the updated beam of the second TRP, or the first received beam corresponds to the second TRP, and the second received beam corresponds to the updated beam of the second TRP.

[0096] As a possible implementation form, the first indication information is a third MAC CE, where the third MAC CE indicates an identifier of a second control resource set related to the second TRP and one TCI state index corresponding to the updated beam of the second TRP, and the updated beam of the second TRP corresponds to the second control resource set.

[0097] As a possible implementation form, the first indication information is a fourth MAC CE and a second DCI, where the fourth MAC CE indicates a plurality of activated TCI state indexes, the second DCI indicates one TCI state index corresponding to the updated beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the fourth MAC CE.

[0098] As a possible implementation form, among the plurality of TCI state indexes carried in the fourth MAC CE, one TCI state index corresponding to the initial beam of the second TRP is included.

[0099] As a possible implementation form, the first DCI and the second DCI include a target indication field for indicating an identifier of a TRP corresponding to a TCI state index and / or a corresponding control resource set pool index.

[0100] As a possible implementation form, in the first DCI and the second DCI, each of the TCI state indexes corresponds to an identifier of one preset TRP and / or a control resource set pool index.

[0101] As a possible implementation form, the identifier of the TRP corresponding to the TCI state index in the first DCI and the second DCI and / or the corresponding control resource set pool index are the TRP identifier and / or the control resource set pool index indicated by the MAC CE that activates the TCI state index.

[0102] As a possible implementation form, the first receiving beam is an initial receiving beam corresponding to the control resource set CORESET#0 related to the first TRP.

[0103] As a possible implementation form, the processor further executes an operation of transmitting second indication information to the terminal device by using a transmitting beam corresponding to a known receiving beam of the terminal device, where the second indication information indicates the first receiving beam of the terminal device, and the known receiving beam corresponds to the first TRP.

[0104] As a possible implementation form, the known receiving beam corresponds to CORESET#0 related to the first TRP, or the known receiving beam corresponds to a third control resource set related to the first TRP and is indicated by third indication information transmitted by CORESET#0 related to the first TRP.

[0105] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes one or more TCI state indexes corresponding to an identifier of one TRP or one or more TCI state indexes corresponding to a control resource set pool index.

[0106] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE is a plurality of TCI state indexes corresponding to identifiers of a plurality of TRPs, where each TCI state index has an identifier of the corresponding TRP, or a plurality of TCI state indexes corresponding to a plurality of control resource set pool indexes, where each TCI state index has a control resource set pool index of the corresponding TCI state index.

[0107] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes an indication field corresponding to at least one TCI state index, and the indication field indicates whether the at least one TCI state index exists in the at least one MAC CE.

[0108] A communication system proposed by an embodiment of another aspect of the present disclosure includes a terminal device and a network device. The terminal device can implement the beam indication method described in the above aspect, and the network device can implement the beam indication method described in the other aspect.

[0109] A computer storage medium proposed by an embodiment of another aspect of the present disclosure stores computer-executable instructions. After the computer-executable instructions are executed by a processor, the beam indication method described in the above aspect can be implemented.

[0110] A computer storage medium proposed by an embodiment of another aspect of the present disclosure stores computer-executable instructions. After the computer-executable instructions are executed by a processor, the beam indication method described in the other aspect can be implemented.

[0111] A computer program product including a computer program proposed by an embodiment of another aspect of the present disclosure can implement the beam indication method described in the above aspect or another aspect when the computer program is executed by a processor.

[0112] The technical solution provided by the embodiment of the present disclosure can include the following technical effects.

[0113] The terminal device receives first indication information using a first receiving beam and determines a second receiving beam to be used for subsequent communication between the terminal device and the network device. Here, the first receiving beam corresponds to a first transmit-receive point (TRP) or a second TRP. Based on the first indication information, a second receiving beam corresponding to the second TRP is determined. As a result, when subsequent signaling for the network device to transmit a beam indication using the second TRP is received, it is received using the second receiving beam, and during communication, the indication of the receiving beam of the indication information is realized, improving the reception success rate of the signaling.

[0114] Additional features and advantages of the present application will be partially shown in the following description, some will become clear from the following description, or will be understood by the practice of the present application.

Brief Description of the Drawings

[0115] The above and / or additional aspects and advantages of the present disclosure will become clear and easier to understand from the description of the embodiments in conjunction with the following drawings.

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Figure 8

Embodiments for Carrying Out the Invention

[0116] Here, exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description relates to the drawings, unless otherwise expressed, the same numerals in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments that coincide with the embodiments of the present disclosure. Rather, they are merely examples of devices and methods that coincide with some aspects of the embodiments of the present disclosure, which are described in detail in the appended claims.

[0117] The terms used in the embodiments of the present disclosure are only for explaining specific embodiments and are not intended to limit the embodiments of the present disclosure. The singular forms "a" and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include the plural form unless the context clearly indicates otherwise. Note that the "and / or" of the terms used in this specification refers to any combination or all possible combinations of one or more related listed items.

[0118] In the embodiments of the present disclosure, terms such as first, second, third, etc. may be used to describe various information, but it should be understood that this information should not be limited to these terms. These terms are only used to distinguish the same type of information. For example, unless departing from the scope of the embodiments of the present disclosure, the first information may be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "then" and "if" used herein can be interpreted as "when" or "in the case of" or "in response to a decision".

[0119] Hereinafter, the embodiments of the present disclosure will be described in detail. Examples of the above embodiments are shown in the accompanying drawings, where the same or similar reference numerals indicate the same or similar elements from beginning to end. Hereinafter, the embodiments described with reference to the accompanying drawings are for explaining the present disclosure and should not be understood as a limitation to the present disclosure.

[0120] Hereinafter, the beam indication method, apparatus, and communication device provided by the present disclosure will be described in detail with reference to the drawings.

[0121] Explanation of terms: The initial beam is the beam that is first used for uplink and downlink transmission between the terminal device and the Transmission and Reception Point (TRP). The known beam is the beam that has already been used for uplink and downlink transmission between the terminal device and the TRP. The updated beam is the beam that is planned to be used for uplink and downlink transmission between the terminal device and the TRP. The TRP corresponds to the serving cell or adjacent cell of the terminal device. The Control Resource Set (CORESET) is the configured resource and is the resource for transmitting downlink control information (DCI) signaling by the downlink control channel PDCCH.

[0122] Regarding the Control Resource Set Pool Index (CORESET Pool Index), one CORESET Pool Index value corresponds to one or more CORESETs, and each CORESET Pool Index corresponds to one TRP. That is, the CORESETs corresponding to different CORESET Pool Index values are used for the PDCCH channels of different TRPs.

[0123] Figure 1 is a schematic flowchart of a beam indication method provided by an embodiment of the present disclosure and is applied to a terminal device.

[0124] As shown in Figure 1, it includes the following step 101.

[0125] In step 101, using the first reception beam, the first indication information transmitted from the network device is received, and the first indication information indicates the second reception beam. Here, the first reception beam corresponds to the first transmission and reception point (TRP) or the second TRP, and the second reception beam corresponds to the second TRP.

[0126] The beam indication method of embodiments of the present disclosure can be applied to any terminal device. The terminal devices can be spread throughout the entire mobile communication system, and each terminal device can be stationary or mobile. The terminal device can also be referred to by those skilled in the art as a mobile station, user station, mobile unit, user unit, radio unit, remote unit, mobile device, terminal device, wireless device, wireless communication device, remote device, mobile user station, access user equipment, mobile user equipment, wireless user equipment, remote user equipment, handheld device, user agent, mobile client, client, in-vehicle device, wearable device, or some other suitable term. The terminal device can be a mobile phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, tablet computer, laptop computer, cordless phone, wireless local loop (WLL) station, etc., and can communicate with network devices in the mobile communication system.

[0127] Here, the network device is arranged in a wireless access network to provide a wireless access function to the terminal device. The network device may be a base station (Base Station, BS). The network device can wirelessly communicate with the terminal device via one or more antennas. The network device can provide communication coverage for the geographical area of its location. The base station can include different types such as macro base stations, micro base stations, relay stations, access points, etc. In some embodiments, the base station can be referred to by those skilled in the art as a base station transceiver, radio base station, access point, radio transceiver, basic service set (Basic Service Set, BSS), extended service set (Extended Service Set, ESS), Node B, evolved Node B (eNodeB or eNodeB), or other appropriate terms. Exemplarily, in a 5G system, the base station is called a gNB. For ease of explanation, in the embodiments of the present disclosure, the device that provides a wireless communication function to the above terminal device is collectively referred to as a network device.

[0128] In this embodiment, the terminal device receives the first instruction information using the first receiving beam, and determines the second receiving beam to be used when the subsequent terminal device communicates with the network device. Here, the first receiving beam corresponds to the first transmit-receive point (TRP) or the second TRP. That is, the first instruction information received using the first receiving beam may be the first instruction information transmitted from the first TRP, or the first instruction information received may be the first instruction information transmitted from the second TRP. As one implementation form, when the first instruction information is transmitted from the first TRP, the first TRP notifies the terminal device of the subsequent second receiving beam according to the first instruction information. The second receiving beam corresponds to the second TRP. The terminal device receives the communication content transmitted from the second TRP using the second receiving beam, including data on the shared channel, signaling on the control channel, or a reference signal. As another implementation form, when the first instruction information is transmitted from the second TRP, that is, the first receiving beam corresponds to the second TRP and the second receiving beam still corresponds to the second TRP, the second TRP notifies the terminal device according to the first instruction information that the subsequent second transmitting beam is still transmitted by the second TRP, and updates the receiving beam used when the terminal device receives the communication content transmitted from itself corresponding to the second TRP. By determining the second receiving beam corresponding to the second TRP based on the first instruction information, when subsequently receiving the beam indication signaling transmitted by the network device using the second TRP, receive it using the second receiving beam, complete the indication of the receiving beam, and during communication, when the TRP switches or the beam of the TRP itself needs to be updated, realize the indication of the receiving beam of the instruction information and improve the receiving success rate of the signaling.

[0129] Based on the above embodiment, the terminal device receives the first instruction information transmitted from the network device using the first receiving beam. However, in different scenarios, the beams of the second TRP corresponding to the second receiving beam indicated by the first instruction information are different. It may indicate the initial beam or the updated beam. Hereinafter, three different scenarios will be described respectively.

[0130] In one scenario, the first receiving beam corresponds to the first TRP, and the second receiving beam corresponds to the initial beam of the second TRP. In this embodiment, the terminal device uses the first receiving beam to receive the first instruction information transmitted from the network device, where the first instruction information instructs the initial beam corresponding to the second TRP. For example, the first TRP can correspond to the TRP of the serving cell, and the second TRP can correspond to the TRP of the serving cell or an adjacent cell. Since the terminal device has not communicated with the second TRP before, it does not know the initial beam for communicating with the second TRP and needs to be instructed by the first TRP to transmit the instruction information.

[0131] In this scenario, the signaling for instructing the first instruction information is also different, which will be described in the following two implementation forms.

[0132] In one implementation form of the present disclosure, the first instruction information is a control element (Control Element, CE, or also called a control unit) MAC CE of the first Medium Access Control (MAC) layer.

[0133] Here, the first MAC CE instructs the identifier of the first control resource set related to the second TRP and one Transmission Configuration Indicator (TCI) state index corresponding to the initial beam of the second TRP, and the initial beam of the second TRP corresponds to the first control resource set. Here, the identifier of the first control resource set is, for example, CORESET#1, or CORESET#2, or CORESET#3, and is not limited in this embodiment.

[0134] In this embodiment, the first MAC CE activates one TCI state index, which corresponds to the initial beam of the second TRP. The initial beam of the second TRP corresponds to the first control resource set, that is, the first control resource set also corresponds to this activated one TCI state index. The one TCI state index activated by the MAC CE can further be used for the transmission of other control resource sets belonging to the same group as the first control resource set, or the Physical Downlink Shared Channel (PDSCH), or the Physical Uplink Shared Channel (PUSCH), or the Physical Uplink Control Channel (PUCCH), or reference signals. The reference signals include Channel State Information-Reference Signal (CSI-RS), Sounding Reference Signal (SRS), Positioning Reference Signal (PRS), Demodulation Reference Signal (DMRS), etc. That is, the one TCI state index activated by the MAC CE can correspond to one common beam, that is, the common beam.

[0135] In another implementation of the present disclosure, the first indication information is the second MAC CE and the first Downlink Control Information (DCI), that is, the first indication information is determined based on the second MAC CE and the first Downlink Control Information (DCI).

[0136] Here, the second MAC CE indicates a plurality of activated TCI state indexes, the first DCI indicates one TCI state index corresponding to the initial beam of the second TRP, and one TCI state index is one of the plurality of activated TCI state indexes included in the second MAC CE. That is, when the second MAC CE indicates that a plurality of TCI state indexes are activated, the first DCI is used to determine one TCI state index from the plurality of activated TCI state indexes, and the determined one TCI state index is set as the TCI state index corresponding to the initial beam of the second TRP. The one TCI state index indicated by the DCI can be further used for the transmission of other control resource sets or physical downlink shared channels (Physical Downlink Shared Channel, PDSCH) or physical uplink shared channels (Physical Uplink Shared Channel, PUSCH) or physical uplink control channels (Physical Uplink Control Channel, PUCCH) or reference signals that belong to the same group as the first control resource set. The reference signals include channel state information reference signals (Channel State Information-Reference Signal, CSI-RS), sounding reference signals (Sounding Reference Signal, SRS), positioning reference signals (Positioning Reference Signal, PRS), demodulation reference signals (Demodulation Reference Signal, DMRS), etc. That is, the one TCI state index indicated by the DCI can correspond to one common beam, that is, a common beam.

[0137] In the second scenario, the first receiving beam used corresponding to the terminal device corresponds to the first TRP, and the second receiving beam corresponds to the updated beam of the second TRP. That is, the updated beam of the second TRP is also indicated by the first TRP transmitting indication information. Considering the first scenario and the second scenario comprehensively, that is, both the initial beam of the second TRP and the updated beam of the second TRP are indicated by the first TRP transmitting indication information. For example, the first TRP can correspond to the TRP of the serving cell, and the second TRP can correspond to the TRP of the serving cell or an adjacent cell.

[0138] In the third scenario, the first receiving beam used corresponding to the terminal device corresponds to the second TRP, and the subsequent receiving beams still correspond to the second TRP. That is, the second TRP corresponds to itself and updates the indication of the receiving beam corresponding to it to update the receiving beam corresponding to the terminal device side. As a result, the first receiving beam corresponds to the second TRP, and the second receiving beam corresponds to the updated beam of the second TRP. Considering the first scenario and the third scenario comprehensively, that is, the initial beam of the second TRP is indicated by the first TRP transmitting indication information, and the updated beam of the second TRP is indicated by the second TRP transmitting indication information. For example, the first TRP can correspond to the TRP of the serving cell, and the second TRP can correspond to the TRP of the serving cell or an adjacent cell.

[0139] In the second scenario and the third scenario, the signaling for indicating the first indication information is also different, which will be described in the following two implementation forms.

[0140] In one implementation form, the first indication information is the third MAC CE. Here, the third MAC CE indicates an identifier of a second control resource set related to the second TRP and one TCI state index corresponding to an updated beam of the second TRP, and the updated beam of the second TRP corresponds to the second control resource set. Here, the identifier of the second control resource set is, for example, CORESET#1 or CORESET#2, or CORESET#3, and is not limited in this embodiment. One TCI state index activated by the MAC CE can further be used for the transmission of other control resource sets belonging to the same group as the second control resource set, or a Physical Downlink Shared Channel (PDSCH), or a Physical Uplink Shared Channel (PUSCH), or a Physical Uplink Control Channel (PUCCH), or a reference signal. The reference signal includes a Channel State Information-Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), a Positioning Reference Signal (PRS), a Demodulation Reference Signal (DMRS), etc. That is, one TCI state index activated by the MAC CE can correspond to one common beam, that is, a common beam.

[0141] Note that the TCI state index is used to indicate a beam. That is, based on the reference signal resource indicated by the TCI state index, the corresponding beam can be determined.

[0142] Note that the identifier of the second control resource set may be the same as or different from the identifier of the first control resource set. For example, the identifier of the first control resource set is CORESET#0, the identifier of the second control resource set is CORESET#1, or both the identifier of the first control resource set and the identifier of the second control resource set are CORESET#0 or CORESET#1. This is not limited in this embodiment.

[0143] In another implementation form, the first indication information is the fourth MAC CE and the second DCI. Here, the fourth MAC CE indicates a plurality of activated TCI state indexes, and the second DCI indicates one TCI state index corresponding to the updated beam of the second TRP. One TCI state index is one of the plurality of activated TCI state indexes included in the fourth MAC CE. The one TCI state index indicated by the DCI can be further used for the transmission of other control resource sets belonging to the same group as the second control resource set or the Physical Downlink Shared Channel (PDSCH) or the Physical Uplink Shared Channel (PUSCH) or the Physical Uplink Control Channel (PUCCH) or a reference signal. The reference signal includes a Channel State Information Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), a Positioning Reference Signal (PRS), a Demodulation Reference Signal (DMRS), etc. That is, the one TCI state index indicated by the DCI can correspond to one common beam, that is, a common beam.

[0144] In one implementation of the embodiments of the present disclosure, at least one MAC CE among the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes one or more TCI state indexes corresponding to the identifier of one TRP, or one or more TCI state indexes corresponding to one control resource set pool index.

[0145] In the second implementation of the embodiments of the present disclosure, at least one MAC CE among the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE is a plurality of TCI state indexes corresponding to the identifiers of a plurality of TRPs, each TCI state index having the identifier of the corresponding TRP, or a plurality of TCI state indexes corresponding to a plurality of control resource set pool indexes, each TCI state index having the control resource set pool index of the corresponding one.

[0146] In a second implementation form of the embodiments of the present disclosure, at least one MAC CE among the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes an indication field corresponding to at least one TCI state index, and the indication field indicates whether at least one TCI state index exists in at least one MAC CE. For example, (the first indication field), (the second indication field), (the activation TCI field of the first TRP), (the activation TCI field of the second TRP). The first indication field corresponds to the first TRP. For example, when the indication field is 0, it indicates that there is no TCI state index in this MAC CE (the activation TCI field of the first TRP), that is, the TCI state corresponding to the first TRP is not activated. The second indication field corresponds to the second TRP. For example, when the indication field is 1, it indicates that there is a TCI state index in this MAC CE (the activation TCI field of the second TRP), that is, the TCI state corresponding to the second TRP is activated.

[0147] In the embodiments of the present disclosure, when a MAC CE indicates a plurality of activated TCI state indexes, when indicating the initial beam of the second TRP, it is necessary to indicate a plurality of TCI state indexes by one MAC CE and indicate one TCI state index corresponding to the initial beam of the second TRP by one DCI. Furthermore, when it is necessary to further indicate the updated beam of the second TRP, it is necessary to indicate a plurality of TCI state indexes by another MAC CE and indicate one TCI state index corresponding to the updated beam of the second TRP by one DCI. That is, after indicating the initial beam of the second TRP, two MACCEs are required to indicate the subsequent updated beam. In order to save the signaling overhead, the MAC CE is integrated.

[0148] As one implementation form, among the plurality of activated TCI state indexes carried in the fourth MAC CE of this embodiment, one TCI state index corresponding to the initial beam of the second TRP is included. That is, among the plurality of activated TCI state indexes carried in the fourth MAC CE, at least one TCI state index corresponding to an initial beam and one TCI state index corresponding to an updated beam are included. Thereby, when it is necessary to indicate the initial beam of the second TRP, it is only necessary to transmit DCI to indicate one TCI state index corresponding to the initial beam of the second TRP from the plurality of activated TCI state indexes carried in the fourth MAC CE, or without the need for DCI for indicating the initial beam of the second TRP, directly confirm the specified TCI state index among the plurality of activated TCI state indexes of the fourth MAC CE as the initial beam of the second TRP. For example, specify the TCI state index corresponding to the TCI state index value with the smallest value, or give the mapping relationship between the combination of the code point of the TCI indication field of DCI and the TCI state by the fourth MAC CE. The combination of TCI states includes one or two TCI states. The specified TCI state index is one TCI state index within the combination of TCI states corresponding to the specified DCI codepoint. For example, the specified DCI codepoint is the codepoint with the smallest possible value of the codepoint. Thereafter, when it is necessary to indicate the updated beam of the second TRP, another DCI is transmitted to indicate one TCI state index among the plurality of activated TCI state indexes of the fourth MAC CE corresponding to the updated beam of the second TRP. By indicating the MAC CE in two cases, indicating the initial beam and indicating the updated beam, by one MAC CE, savings of the MAC CE are realized and the cost of the system is reduced.

[0149] In embodiments of the present disclosure, in some scenarios, the first reception beam corresponds to the first TRP, the second reception beam corresponds to the initial beam of the second TRP, and in another scenario, the first reception beam corresponds to the first TRP, and the second reception beam corresponds to the updated beam of the second TRP. In these two scenarios, when the MAC CE indicates a plurality of activated TCI state indexes, the DCI indicates one TCI state index from the plurality of activated TCI state indexes, and it is necessary to indicate whether this one TCI state index corresponds to the first TRP or the second TRP, thereby improving the efficiency and accuracy of the indication. Hereinafter, in this embodiment, it will be specifically described by the following three implementation forms.

[0150] As a first implementation form, the first DCI and the second DCI include a target indication field, where the target indication field indicates an identifier of a TRP corresponding to the TCI state index and / or a corresponding control resource set pool index. That is, the target indication field indicates which TRP the TCI state index corresponds to and / or which control resource set pool it corresponds to. Here, each control resource set pool index and the TRP have a corresponding relationship. When the control resource set pool index is determined, which TRP it corresponds to is determined. For example, it corresponds to the first TRP or the second TRP.

[0151] As a second embodiment, in the first DCI and the second DCI, each TCI state index corresponds to an identifier of one preset TRP and / or a control resource set pool index. That is, different TCI state indexes have an identifier of one TRP corresponding thereto. That is, when the TRP identifiers are different, the corresponding TCI state indexes are different. For example, if the TCI state indexes corresponding to the first TRP are 1 and 2, the TCI state indexes corresponding to the second TRP are 3 and 4. Thus, by making the TCI state index correspond to an identifier of one preset TRP, it is possible to determine which TRP the corresponding TRP is, for example, the first TRP or the second TRP. Or, different TCI state indexes have a control resource set pool index corresponding thereto. By making the TCI state index correspond to a preset control resource set pool index, it is possible to determine which TRP the corresponding TRP is, for example, the first TRP or the second TRP. Here, each control resource set pool index and the TRP have a corresponding relationship. When the control resource set pool index is determined, which TRP it corresponds to is determined, for example, it corresponds to the first TRP or the second TRP.

[0152] As a third implementation form, the identifier of the TRP corresponding to the TCI state index in the first DCI and the second DCI and / or the corresponding control resource set pool index are the TRP identifier and / or the control resource set pool index indicated by the MAC CE that activates the TCI state index.

[0153] Taking the first DCI as an example, here, in one implementation of the present disclosure, the identifier of the TRP corresponding to the TCI state index in the first DCI is the TRP identifier indicated by the MAC CE that activates the TCI state index, that is, the MAC CE indicates the TRP identifier. Here, as one implementation, in the MAC CE format, the setting of the bit position of the TCI state index that activates different TRPs is different, and based on the bit position, it is possible to determine which TRP the activated TCI state index belongs to. As a second embodiment, the control resource set pool index corresponding to the TCI state index in the first DCI is the control resource set pool index indicated by the MAC CE that activates the TCI state index. As a third implementation, the MAC CE format includes a CORESET ID, and since each CORESET ID corresponds to a unique control resource set pool index, the TRP corresponding to this TCI state index can be determined based on the CORESET ID. As a fourth embodiment, different bit values can also be set to indicate whether to activate the TCI state index of each TRP and which TRP's TCI state index is activated.

[0154] Figure 2 is a schematic flowchart of another beam indication method provided by an embodiment of the present disclosure. This method is applied to a terminal device. As shown in Figure 2, this method includes the following steps 201 to 202.

[0155] In step 201, a first received beam is determined.

[0156] As one implementation form of the embodiment of the present disclosure, the first receiving beam is the initial receiving beam of the control resource set CORESET#0 related to the first TRP. Here, the initial receiving beam is the beam first used by the terminal device to perform uplink and downlink transmission with the first TRP. The initial receiving beam of CORESET#0 related to the first TRP can be determined by the terminal device based on the value of the detected reference signal receiving power (RSRP) of the synchronization signal block (SSB) transmitted from the network device. When the terminal device detects that the value of the RSRP exceeds the threshold, it starts random access using the PRACH resource corresponding to this SSB, that is, determines the receiving beam corresponding to this SSB as the initial receiving beam of CORESET#0, and thereby determines the first receiving beam.

[0157] As another implementation form of the embodiment of the present disclosure, the second indication information is received using a known receiving beam corresponding to the first TRP, and the second indication information indicates the first receiving beam. That is, the second indication information is received using a known receiving beam corresponding to the first TRP, and the second indication information indicates the first receiving beam.

[0158] Here, the known receiving beam is the beam already used when the terminal device receives the downlink transmission transmitted from the first TRP. As one implementation form, the known receiving beam corresponds to CORESET#0 related to the first TRP. That is, the known beam is the beam corresponding to CORESET#0 determined when the terminal device detects the value of the RSRP of the synchronization signal block SSB transmitted from the network device and the value of the RSRP is greater than the threshold. As another implementation form, the known receiving beam corresponds to the third control resource set related to the first TRP and is indicated by the third indication information transmitted by CORESET#0 related to the first TRP.

[0159] In step 202, the first received beam is used to receive first instruction information transmitted from a network device. Here, the first instruction information instructs a second received beam. The first received beam corresponds to a first transmit-receive point (TRP) or a second TRP, and the second received beam corresponds to the second TRP.

[0160] Here, step 202 can refer to the description of any of the above embodiments, and the principle is the same, so the description is omitted here.

[0161] In the beam instruction method of this embodiment, the terminal device uses the first received beam to receive the first instruction information, and determines the second received beam to be used when the subsequent terminal device communicates with the network device. Here, the first received beam corresponds to a first transmit-receive point (TRP) or a second TRP, that is, the first received beam may be the received beam used when receiving the first instruction information transmitted from the first TRP, or the received beam used when receiving the first instruction information transmitted from the second TRP. Based on the first instruction information, by determining the second received beam corresponding to the second TRP, when the subsequent network device receives the instruction signaling transmitted using the second TRP, it is received using the second received beam, completing the instruction of the received beam, and improving the reception success rate of the signaling.

[0162] FIG. 3 is a schematic flowchart of another beam instruction method provided by an embodiment of the present disclosure, which is applied to a network device.

[0163] As shown in FIG. 3, this method includes the following step 301.

[0164] In step 301, the first transmitted beam is used to transmit first instruction information to the terminal device. Here, the first instruction information instructs the second received beam of the terminal device. The first transmitted beam corresponds to the first received beam of the terminal device. The first received beam corresponds to a first transmit-receive point (TRP) or a second TRP, and the second received beam corresponds to the second TRP.

[0165] The beam indication method of the embodiments of the present disclosure is applicable to any network device. Here, the network device is disposed in a wireless access network to provide a wireless access function to a terminal device. The network device may be a Base Station (BS). The network device can wirelessly communicate with the terminal device via one or more antennas. The network device can provide communication coverage for the geographical area where it is located. The base station can include different types such as a macro base station, a micro base station, a relay station, an access point, etc. In some embodiments, the base station can be referred to by those skilled in the art as a base station transceiver, a wireless base station, an access point, a wireless transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a Node B, an evolved Node B (eNB or eNodeB), or other appropriate terms. Exemplarily, in a 5G system, the base station is called a gNB. For ease of explanation, in the embodiments of the present disclosure, the device that provides a wireless communication function to the above terminal device is collectively referred to as a network device.

[0166] Here, the terminal device can also be referred to by those skilled in the art as a mobile station, user station, mobile unit, user unit, wireless unit, remote unit, mobile device, terminal device, wireless device, wireless communication device, remote device, mobile user station, access user device, mobile user device, wireless user device, remote user device, handheld device, user agent, mobile client, client, in-vehicle device, wearable device, or some other appropriate term. The terminal device can be a mobile phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, tablet computer, laptop computer, cordless phone, wireless local loop (WLL) station, etc., and can communicate with network devices in a mobile communication system.

[0167] In this embodiment, the network device transmits first instruction information to the terminal device using a first transmission beam, and the terminal device determines a second reception beam based on the first instruction information. Here, the second reception beam is the reception beam used when the terminal device re-communicates with the network device after receiving the first instruction information.

[0168] In this embodiment, the first transmission beam corresponds to the first reception beam of the terminal device. Here, the first reception beam corresponds to the first transmit-receive point (TRP) or the second TRP. That is, the first instruction information transmitted from the first TRP may be received using the first reception beam, or the first instruction information transmitted from the second TRP may be received. As one implementation form, when the first instruction information is transmitted from the first TRP, the first TRP can notify the terminal device of the subsequent second reception beam according to the first instruction information, and the second reception beam corresponds to the second TRP. As another implementation form, when the first instruction information is transmitted from the second TRP, that is, the first reception beam corresponds to the second TRP and the second reception beam still corresponds to the second TRP, the corresponding terminal device updates the reception beam used when receiving the communication content transmitted from the second TRP. Based on the first instruction information, the second reception beam of the terminal device is determined. As a result, when the network device subsequently transmits the signaling of the instruction beam using the second TRP, the terminal device receives it using the second reception beam, completing the instruction of the reception beam of the terminal device. During communication, when the TRP needs to be switched or the transmission beam of the TRP itself needs to be updated, beam switching is enabled to improve the reception success rate of the signaling.

[0169] Based on the above embodiments, the network device transmits the first instruction information to the terminal device using the first transmission beam. However, in different scenarios, the first reception beam corresponds to the first transmit-receive point (TRP) or the second TRP, and the beams of the second TRP corresponding to the second transmission beam instructed by the first instruction information are different. It may instruct the initial beam or the updated beam. Hereinafter, three different scenarios will be described respectively.

[0170] In one scenario, the first received beam corresponds to the beam of the first TRP, and the second received beam corresponds to the initial beam of the second TRP. In this embodiment, the network device transmits first indication information to the terminal device using the first transmission beam of the first TRP, where the first indication information indicates the initial beam corresponding to the second TRP. For example, the first TRP may correspond to the TRP of the serving cell, and the second TRP may correspond to the TRP of the serving cell or an adjacent cell. Since the terminal device has not communicated with the second TRP before, it does not know the initial beam for communicating with the second TRP and needs to be instructed by the first TRP to transmit the first indication information.

[0171] In this scenario, the signaling for indicating the first indication information is also different, which will be described in the following two implementation forms.

[0172] In one implementation form of the present disclosure, the first indication information is the control element (CE) MAC CE of the first Medium Access Control (MAC) layer, or the control unit MAC CE of the first Medium Access Control layer.

[0173] Here, the first MAC CE indicates the identifier of the first control resource set related to the second TRP and one transmission configuration indication (TCI) state index corresponding to the initial beam of the second TRP, and the initial beam of the second TRP corresponds to the first control resource set. Here, the identifier of the first control resource set is, for example, CORESET#1 or CORESET#2, or CORESET#3, and is not limited in this embodiment.

[0174] In this embodiment, the first MAC CE activates one TCI state index, and this TCI state index corresponds to the initial beam of the second TRP. The initial beam of the second TRP corresponds to the first control resource set, that is, the first control resource set also corresponds to this activated one TCI state index. The one TCI state index activated by the MAC CE can further be used for the transmission of other control resource sets belonging to the same group as the first control resource set, or the Physical Downlink Shared Channel (PDSCH), or the Physical Uplink Shared Channel (PUSCH), or the Physical Uplink Control Channel (PUCCH), or reference signals. The reference signals include Channel State Information Reference Signal (CSI-RS), Sounding Reference Signal (SRS), Positioning Reference Signal (PRS), Demodulation Reference Signal (DMRS), etc. That is, the one TCI state index activated by the MAC CE can correspond to one common beam, that is, the common beam.

[0175] In another implementation of the present disclosure, the first indication information is the second MAC CE and the first Downlink Control Information (DCI), that is, the first indication information is determined based on the second MAC CE and the first Downlink Control Information (DCI).

[0176] Here, the second MAC CE indicates a plurality of activated TCI state indexes, the first DCI indicates one TCI state index corresponding to the initial beam of the second TRP, and one TCI state index is one of the plurality of activated TCI state indexes included in the second MAC CE. That is, when the second MAC CE indicates that a plurality of TCI state indexes are activated, the first DCI is used to determine one TCI state index from the plurality of activated TCI state indexes, and the determined one TCI state index is set as the TCI state index corresponding to the initial beam of the second TRP. The one TCI state index indicated by the DCI can be further used for the transmission of other control resource sets or physical downlink shared channels (Physical Downlink Shared Channel, PDSCH) or physical uplink shared channels (Physical Uplink Shared Channel, PUSCH) or physical uplink control channels (Physical Uplink Control Channel, PUCCH) or reference signals belonging to the same group as the first control resource set. The reference signals include channel state information reference signals (Channel State Information Reference Signal, CSI-RS), sounding reference signals (Sounding Reference Signal, SRS), positioning reference signals (Positioning Reference Signal, PRS), demodulation reference signals (Demodulation Reference Signal, DMRS), etc. That is, the one TCI state index indicated by the DCI can correspond to one common beam, that is, a common beam.

[0177] In the second scenario, the first received beam corresponds to the beam of the first TRP, and the second received beam corresponds to the updated beam of the second TRP. That is, the updated beam of the second TRP is also indicated by the first TRP sending indication information. Considering the first scenario and the second scenario comprehensively, that is, both the initial beam and the updated beam of the second TRP are indicated by the first TRP sending the first indication information. For example, the first TRP can correspond to the TRP of the serving cell, and the second TRP can correspond to the TRP of the serving cell or an adjacent cell.

[0178] In the third scenario, an update instruction is given for the received beam corresponding to itself corresponding to the second TRP. Thereby, the first received beam corresponds to the second TRP, and the second received beam corresponds to the updated beam of the second TRP. Considering the first scenario and the third scenario comprehensively, that is, the initial beam of the second TRP is indicated by the first TRP sending indication information, and the updated beam of the second TRP is indicated by the second TRP sending the first indication information. For example, the first TRP can correspond to the TRP of the serving cell, and the second TRP can correspond to the TRP of the serving cell or an adjacent cell.

[0179] In the second scenario and the third scenario, the signaling for indicating the first indication information is also different, which will be described in the following two implementation forms.

[0180] In one implementation form, the first indication information is the third MAC CE. Here, the third MAC CE indicates an identifier of a second control resource set related to the second TRP and one TCI state index corresponding to an updated beam of the second TRP, and the updated beam of the second TRP corresponds to the second control resource set. Here, the identifier of the second control resource set is, for example, CORESET#1 or CORESET#2, or CORESET#3, and is not limited in this embodiment. One TCI state index activated by the MAC CE can further be used for the transmission of another control resource set or a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH) or a reference signal belonging to the same group as the second control resource set. The reference signal includes a Channel State Information Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), a Positioning Reference Signal (PRS), a Demodulation Reference Signal (DMRS), etc. That is, one TCI state index activated by the MAC CE can correspond to one common beam, that is, a common beam.

[0181] Note that the TCI state index is used to indicate a beam. That is, based on the reference signal resource indicated by the TCI state index, the corresponding beam can be determined.

[0182] Note that the identifier of the second control resource set may be the same as or different from the identifier of the first control resource set. For example, the identifier of the first control resource set is CORESET#0, and the identifier of the second control resource set is CORESET#1, or both the identifier of the first control resource set and the identifier of the second control resource set are CORESET#0 or CORESET#1. This is not limited in this embodiment.

[0183] In another implementation form, the first indication information is the fourth MAC CE and the second DCI. Here, the fourth MAC CE indicates a plurality of activated TCI state indexes, and the second DCI indicates one TCI state index corresponding to the updated beam of the second TRP. One TCI state index is one of the plurality of activated TCI state indexes included in the fourth MAC CE. One TCI state index indicated by the DCI can be further used for the transmission of other control resource sets or physical downlink shared channels (Physical Downlink Shared Channel, PDSCH) or physical uplink shared channels (Physical Uplink Shared Channel, PUSCH) or physical uplink control channels (Physical Uplink Control Channel, PUCCH) or reference signals belonging to the same group as the second control resource set. The reference signals include channel state information reference signals (Channel State Information Reference Signal, CSI-RS), sounding reference signals (Sounding Reference Signal, SRS), positioning reference signals (Positioning Reference Signal, PRS), demodulation reference signals (Demodulation Reference Signal, DMRS), etc. That is, one TCI state index indicated by the DCI can correspond to one common beam, that is, a common beam.

[0184] In one implementation of the embodiments of the present disclosure, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes one or more TCI state indexes corresponding to the identifier of one TRP, or one or more TCI state indexes corresponding to one control resource set pool index.

[0185] In the second implementation of the embodiments of the present disclosure, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes a plurality of TCI state indexes corresponding to the identifiers of a plurality of TRPs, where each TCI state index has the identifier of the corresponding TRP, or a plurality of TCI state indexes corresponding to a plurality of control resource set pool indexes, where each TCI state index has the control resource set pool index of the corresponding control resource set pool index.

[0186] In a second implementation form of the embodiments of the present disclosure, at least one MAC CE among the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes an indication field corresponding to at least one TCI state index, and the indication field indicates whether at least one TCI state index exists in at least one MAC CE. For example, (the first indication field), (the second indication field), (the activation TCI field of the first TRP), (the activation TCI field of the second TRP). The first indication field corresponds to the first TRP. When the indication field is 0, it indicates that there is no TCI state index in this MAC CE (the activation TCI field of the first TRP), that is, the TCI state corresponding to the first TRP is not activated. The second indication field corresponds to the second TRP. When the indication field is 1, it indicates that there is a TCI state index in this MAC CE (the activation TCI field of the second TRP), that is, the TCI state corresponding to the second TRP is activated.

[0187] In the embodiments of the present disclosure, when a MAC CE indicates a plurality of activated TCI state indexes, when indicating the initial beam of the second TRP, it is necessary for one MAC CE to indicate a plurality of TCI state indexes, and for one DCI to indicate one TCI state index corresponding to the initial beam of the second TRP. Furthermore, when it is necessary to further indicate the updated beam of the second TRP, it is necessary for another MAC CE to indicate a plurality of TCI state indexes, and for one DCI to indicate one TCI state index corresponding to the updated beam of the second TRP. That is, after indicating the initial beam of the second TRP, two MAC CEs are required to indicate the subsequent updated beam. In order to save the signaling overhead, the MAC CEs are integrated.

[0188] As one implementation form, among the multiple activated TCI state indexes carried in the fourth MAC CE of this embodiment, one TCI state index corresponding to the initial beam of the second TRP is included. That is, among the multiple activated TCI state indexes carried in the fourth MAC CE, at least one TCI state index corresponding to the initial beam and one TCI state index corresponding to the updated beam are included. Thus, when it is necessary to indicate the initial beam of the second TRP, it is only necessary to transmit DCI to indicate one TCI state index corresponding to the initial beam of the second TRP from among the multiple activated TCI state indexes carried in the fourth MAC CE, or without the need for DCI for indicating the initial beam of the second TRP, directly confirm the specified TCI state index among the multiple activated TCI state indexes of the fourth MAC CE as the initial beam of the second TRP. For example, specify the TCI state index corresponding to the TCI state index value that is the smallest, or give the mapping relationship between the combination of the codepoint of the TCI indication field of DCI and the TCI state by the fourth MAC CE. The combination of TCI states includes one or two TCI states. The specified TCI state index is one TCI state index within the combination of TCI states corresponding to the specified DCI codepoint. For example, the specified DCI codepoint is the codepoint with the smallest possible value of the codepoint. Then, when it is necessary to indicate the updated beam of the second TRP, another DCI is transmitted to indicate one TCI state index among the multiple activated TCI state indexes of the fourth MAC CE corresponding to the updated beam of the second TRP. By indicating the MAC CE in two cases, indicating the initial beam and indicating the updated beam, by one MAC CE, the saving of MAC CE is realized and the cost of the system is reduced.

[0189] In embodiments of the present disclosure, in some scenarios, the first reception beam corresponds to the first TRP, the second reception beam corresponds to the initial beam of the second TRP, and in another scenario, the first reception beam corresponds to the first TRP, and the second reception beam corresponds to the updated beam of the second TRP. In these two scenarios, when the MAC CE indicates a plurality of activated TCI state indexes, the DCI indicates one TCI state index from the plurality of activated TCI state indexes, and it is necessary to indicate whether this one TCI state index corresponds to the first TRP or the second TRP, thereby improving the efficiency and accuracy of the above indication. Hereinafter, in this embodiment, it will be specifically described in the following three implementation forms.

[0190] As a first implementation form, the first DCI and the second DCI include a target indication field, where the target indication field indicates an identifier of a TRP corresponding to the TCI state index and / or a corresponding control resource set pool index. That is, the target indication field indicates which TRP the TCI state index corresponds to and / or which control resource set pool it corresponds to. Here, each control resource set pool index has a corresponding relationship with the TRP. When the control resource set pool index is determined, which TRP it corresponds to is determined. For example, it corresponds to the first TRP or the second TRP.

[0191] As a second embodiment, in the first DCI and the second DCI, each TCI state index corresponds to an identifier of one pre-set TRP and / or a control resource set pool index. That is, different TCI state indexes have an identifier of one TRP corresponding thereto. That is, when the TRP identifiers are different, the corresponding TCI state indexes are different. For example, if the TCI state indexes corresponding to the first TRP are 1 and 2, the TCI state indexes corresponding to the second TRP are 3 and 4. Thus, by corresponding the TCI state index to an identifier of one pre-set TRP, it is possible to determine which TRP the corresponding TRP is, for example, the first TRP or the second TRP. Or, different TCI state indexes have a control resource set pool index corresponding thereto. By corresponding the TCI state index to a control resource set pool index of one pre-set, it is possible to determine which TRP the corresponding TRP is, for example, the first TRP or the second TRP. Here, each control resource set pool index and the TRP have a corresponding relationship. When the control resource set pool index is determined, it is determined which TRP it corresponds to, for example, it corresponds to the first TRP or the second TRP.

[0192] As a third implementation form, the identifier of the TRP corresponding to the TCI state index in the first DCI and the second DCI and / or the corresponding control resource set pool index are the TRP identifier and / or the control resource set pool index indicated by the MAC CE that activates the TCI state index.

[0193] Taking the first DCI as an example, here, in one implementation form, the identifier of the TRP corresponding to the TCI state index in the first DCI is the TRP identifier indicated by the MAC CE that activates the TCI state index, that is, the MAC CE indicates the TRP identifier. Here, in one implementation form, in the MAC CE format, the settings of the bit positions of the TCI state indexes that activate different TRPs are different, and based on the bit positions, it is possible to determine which TRP's TCI state index has been activated. As a second embodiment, the control resource set pool index corresponding to the TCI state index in the first DCI is the control resource set pool index indicated by the MAC CE that activates the TCI state index. As a third implementation form, the MAC CE format includes a CORESET ID, and since each CORESET ID corresponds to a unique control resource set pool index, it is possible to determine the TRP corresponding to this TCI state index based on the CORESET ID. As a fourth embodiment, different bit values can also be set to indicate whether to activate the TCI state index of each TRP and which TRP's TCI state index has been activated.

[0194] In an embodiment of the present disclosure, the first instruction information is transmitted to the terminal device using the first transmission beam, where the first transmission beam corresponds to the first reception beam, that is, the terminal device receives the first instruction information using the first reception beam. Here, regarding the method for determining the first reception beam used by the terminal device, as one implementation form of the embodiment of the present disclosure, the first reception beam is the initial reception beam corresponding to the control resource set CORESET#0 related to the first TRP. Here, the initial reception beam is the beam first used by the terminal device for uplink and downlink transmission with the first TRP. The initial reception beam corresponding to CORESET#0 related to the first TRP can be determined based on the detected RSRP value of the synchronization signal block SSB transmitted from the network device by the terminal device. When the terminal device detects that the RSRP value exceeds the threshold, it starts random access using the PRACH resource corresponding to this SSB, that is, the reception beam corresponding to this SSB is used as the initial reception beam of CORESET#0, whereby the first reception beam is determined.

[0195] FIG. 4 is a schematic flowchart of another beam instruction method provided by an embodiment of the present disclosure, which is applied to a network device and describes another method for instructing the first reception beam of a terminal device. As shown in FIG. 4, this method includes the following steps 401 to 402.

[0196] In step 401, the second instruction information is transmitted to the terminal device using the transmission beam corresponding to the known reception beam of the terminal device.

[0197] Here, the second instruction information instructs the first reception beam of the terminal device, and the known reception beam corresponds to the first TRP.

[0198] In an embodiment of the present disclosure, a known reception beam is a reception beam that has already been used by a terminal device when a first transmission and reception point (TRP) transmits a downlink transmission to the terminal device. As one implementation form, the known reception beam corresponds to CORESET #0 related to the first TRP, that is, the known reception beam is a beam corresponding to CORESET #0 determined when the terminal device detects the value of the reference signal received power (RSRP) of the synchronization signal block (SSB) transmitted from the network device and the value of the RSRP is greater than a threshold. As another implementation form, the known reception beam corresponds to a third control resource set related to the first TRP and is indicated by the third indication information transmitted by CORESET #0 related to the first TRP.

[0199] In step 402, the first indication information is transmitted to the terminal device by using the first transmission beam.

[0200] Here, step 402 can refer to the description of any of the above embodiments, and the principle is the same, so the description is omitted here.

[0201] In the beam indication method of this embodiment, the network device transmits the first indication information to the terminal device by using the first transmission beam to determine a second reception beam to be used by the terminal device when the terminal device communicates with the network device subsequently. Here, the first reception beam corresponds to the first transmission and reception point (TRP) or the second TRP, and the second reception beam corresponds to the second TRP. Thereby, when the network device subsequently uses the second TRP to transmit signaling for indicating the beam, the terminal device receives it by using the second reception beam, completing the indication of the reception beam of the terminal device and improving the reception success rate of the signaling.

[0202] Corresponding to the beam indication method provided by some of the above embodiments, the present disclosure further provides a beam indication device. Since the beam indication device provided by the embodiments of the present disclosure corresponds to the method provided by some of the above embodiments, the embodiments of the beam indication method are also applicable to the beam indication device provided by this embodiment, and the description is omitted in this embodiment.

[0203] FIG. 5 is a schematic configuration diagram of a beam indication device 110 provided by an embodiment of the present disclosure. The device is applied to a terminal device.

[0204] As shown in FIG. 5, this beam indication device 110 includes a receiving module 51.

[0205] The receiving module 51 uses a first receiving beam to receive first indication information transmitted from a network device. The first indication information indicates a second receiving beam. Here, the first receiving beam corresponds to a first transmission and reception point (TRP) or a second TRP, and the second receiving beam corresponds to the second TRP.

[0206] Furthermore, as a possible implementation form, the first receiving beam corresponds to the first TRP, and the second receiving beam corresponds to the initial beam of the second TRP.

[0207] As a possible implementation form, the first indication information is a control element (MAC CE) of a first media access control layer. Here, the first MAC CE indicates an identifier of a first control resource set related to the second TRP and one transmission configuration indication (TCI) state index corresponding to the initial beam of the second TRP, and the initial beam of the second TRP corresponds to the first control resource set.

[0208] In a possible implementation form, the first indication information is a second MAC CE and a first downlink control information (DCI), where the second MAC CE indicates a plurality of activated TCI state indexes, the first DCI indicates one TCI state index corresponding to the initial beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the second MAC CE.

[0209] In a possible implementation form, the first receiving beam corresponds to a first TRP, the second receiving beam corresponds to an updated beam of a second TRP, or the first receiving beam corresponds to the second TRP, and the second receiving beam corresponds to an updated beam of the second TRP.

[0210] In a possible implementation form, the first indication information is a third MAC CE, where the third MAC CE indicates an identifier of a second control resource set related to the second TRP and one TCI state index corresponding to the updated beam of the second TRP, and the updated beam of the second TRP corresponds to the second control resource set.

[0211] In a possible implementation form, the first indication information is a fourth MAC CE and a second DCI, where the fourth MAC CE indicates a plurality of activated TCI state indexes, the second DCI indicates one TCI state index corresponding to the updated beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the fourth MAC CE.

[0212] In a possible implementation form, the plurality of activated TCI state indexes carried by the fourth MAC CE includes one TCI state index corresponding to the initial beam of the second TRP.

[0213] As a possible implementation form, the first DCI and the second DCI include a target indication field for indicating an identifier of a TRP corresponding to a TCI state index and / or a corresponding control resource set pool index.

[0214] As a possible implementation form, in the first DCI and the second DCI, each of the TCI state indexes corresponds to an identifier of one preset TRP and / or a corresponding control resource set pool index.

[0215] As a possible implementation form, the identifier of the TRP corresponding to the TCI state index in the first DCI and the second DCI and / or the corresponding control resource set pool index are the TRP identifier and / or the control resource set pool index indicated by the MAC CE that activates the TCI state index.

[0216] As a possible implementation form, the device further includes a determination module for determining the first reception beam, where the first reception beam is an initial reception beam of a control resource set CORESET#0 related to the first TRP.

[0217] As a possible implementation form, the receiving module 51 further receives second indication information using a known reception beam corresponding to the first TRP, and the second indication information is for determining the first reception beam.

[0218] As a possible implementation form, the known reception beam corresponds to CORESET#0 related to the first TRP, or the known reception beam corresponds to a third control resource set related to the first TRP and is indicated by third indication information transmitted by CORESET#0 related to the first TRP.

[0219] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes one or more TCI state indexes corresponding to the identifier of one TRP, or one or more TCI state indexes corresponding to one control resource set pool index.

[0220] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE is a plurality of TCI state indexes corresponding to the identifiers of a plurality of TRPs, each TCI state index having the identifier of the corresponding TRP, or a plurality of TCI state indexes corresponding to a plurality of control resource set pool indexes, each TCI state index having the control resource set pool index corresponding thereto.

[0221] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes an indication field corresponding to at least one TCI state index, and the indication field indicates whether the at least one TCI state index exists in the at least one MAC CE.

[0222] In the apparatus according to an embodiment of the present disclosure, the terminal device receives first indication information using a first reception beam, and determines a second reception beam to be used when the subsequent terminal device communicates with a network device. Here, the first reception beam corresponds to a first transmission and reception point (TRP) or a second TRP, that is, the first reception beam may be a reception beam used when receiving the first indication information transmitted from the first TRP, or may be a reception beam used when receiving the first indication information transmitted from the second TRP. Based on the first indication information, a second reception beam corresponding to the second TRP is determined, so that when the network device subsequently receives the indication signaling transmitted using the second TRP, the second reception beam is used for reception, completing the indication of the reception beam and improving the reception success rate of the signaling.

[0223] Corresponding to the beam indication method provided by some of the above embodiments, the present disclosure further provides a beam indication device. Since the beam indication device provided by the embodiments of the present disclosure corresponds to the beam indication method provided by some of the above embodiments, the embodiments of the beam indication method are also applicable to the beam indication device provided by this embodiment, and the description is omitted in this embodiment.

[0224] FIG. 6 is a schematic configuration diagram of a beam indication device 120 provided by an embodiment of the present disclosure. The device is applicable to a network device.

[0225] Here, the beam indication device 120 includes a transmission module 61.

[0226] The transmission module 61 transmits first indication information to the terminal device using a first transmission beam. Here, the first indication information indicates a second reception beam of the terminal device, the first transmission beam corresponds to a first reception beam of the terminal device, the first reception beam corresponds to a first transmission and reception point (TRP) or a second TRP, and the second reception beam corresponds to the second TRP.

[0227] Furthermore, as a possible implementation form, the first received beam is the beam of the first TRP, and the second received beam is the initial beam of the second TRP.

[0228] As a possible implementation form, the first indication information is a control element (MAC CE) of the first media access control layer. Here, the first MAC CE indicates an identifier of a first control resource set related to the second TRP and one transmission configuration indication (TCI) state index corresponding to the initial beam of the second TRP, and the initial beam of the second TRP corresponds to the first control resource set.

[0229] As a possible implementation form, the first indication information is a second MAC CE and a first downlink control information (DCI). Here, the second MAC CE indicates a plurality of activated TCI state indexes, and the first DCI indicates one TCI state index corresponding to the initial beam of the second TRP. The one TCI state index is one of the plurality of activated TCI state indexes included in the second MAC CE.

[0230] As a possible implementation form, the first received beam corresponds to the beam of the first TRP, the second received beam corresponds to the updated beam of the second TRP, or the first received beam corresponds to the beam of the second TRP, and the second received beam corresponds to the updated beam of the second TRP.

[0231] As a possible implementation form, the first indication information is a third MAC CE. Here, the third MAC CE indicates an identifier of a second control resource set related to the second TRP and one TCI state index corresponding to the updated beam of the second TRP, and the updated beam of the second TRP corresponds to the second control resource set.

[0232] As a possible implementation form, the first indication information is the fourth MAC CE and the second DCI. Here, the fourth MAC CE indicates a plurality of activated TCI state indexes, and the second DCI indicates one TCI state index corresponding to the updated beam of the second TRP. The one TCI state index is one of the plurality of activated TCI state indexes included in the fourth MAC CE.

[0233] As a possible implementation form, among the plurality of TCI state indexes carried in the fourth MAC CE, one TCI state index corresponding to the initial beam of the second TRP is included.

[0234] As a possible implementation form, the first DCI and the second DCI include a target indication field for indicating an identifier of a TRP corresponding to a TCI state index and / or a corresponding control resource set pool index.

[0235] As a possible implementation form, in the first DCI and the second DCI, each TCI state index corresponds to a preset identifier of one TRP and / or a corresponding control resource set pool index.

[0236] As a possible implementation form, the identifier of the TRP corresponding to the TCI state index in the first DCI and the second DCI and / or the corresponding control resource set pool index are the TRP identifier and / or the control resource set pool index indicated by the MAC CE that activates the TCI state index.

[0237] As a possible implementation form, the first reception beam is an initial reception beam corresponding to the control resource set CORESET#0 related to the first TRP.

[0238] As a possible implementation form, the above transmission module 61 further uses a transmission beam corresponding to a known reception beam of the terminal device to transmit second indication information to the terminal device, where the second indication information indicates the first reception beam of the terminal device, and the known reception beam corresponds to the first TRP.

[0239] As a possible implementation form, the known reception beam corresponds to CORESET#0 related to the first TRP, or the known reception beam corresponds to a third control resource set related to the first TRP and is indicated by third indication information transmitted by CORESET#0 related to the first TRP.

[0240] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes one or more TCI state indexes corresponding to an identifier of one TRP, or one or more TCI state indexes corresponding to one control resource set pool index.

[0241] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes a plurality of TCI state indexes corresponding to identifiers of a plurality of TRPs, where each TCI state index has an identifier of the corresponding TRP, or a plurality of TCI state indexes corresponding to a plurality of control resource set pool indexes, where each TCI state index has a control resource set pool index of the corresponding TCI state index.

[0242] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes an indication field corresponding to at least one TCI state index, and the indication field indicates whether the at least one TCI state index exists in the at least one MAC CE.

[0243] In an embodiment of the present disclosure, a network device transmits first indication information to a terminal device using a first transmission beam to determine a second reception beam to be used by the terminal device when subsequently communicating between the terminal device and the network device. Here, the first reception beam corresponds to a first transmission and reception point (TRP) or a second TRP, and the second reception beam corresponds to the second TRP. Accordingly, when the network device subsequently transmits indication signaling using the second TRP, the terminal device receives using the second reception beam, improving the reception success rate of the signaling.

[0244] FIG. 7 is a block diagram of a terminal device provided by an embodiment of the present disclosure. For example, the terminal device 600 may be a mobile phone, a computer, a digital broadcast user device, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0245] As shown in FIG. 7, the terminal includes a transceiver 800, a processor 810, and a memory 820.

[0246] Here, the memory 820 stores a computer program, the transceiver 800 transmits and receives data under the control of the processor 810, and the processor 810 reads the computer program in the memory 820 and executes an operation of receiving the first indication information transmitted from the network device using the first reception beam, where the first indication information indicates a second reception beam. Here, the first reception beam corresponds to a first transmission and reception point (TRP) or a second TRP, and the second reception beam corresponds to the second TRP.

[0247] The transceiver 800 transmits and receives data under the control of the processor 810.

[0248] Here, in FIG. 7, the bus architecture can include any number of interconnected buses and bridges linking various circuits of one or more processors represented by the processor 810 and memory represented by the memory 820. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are all well known to those skilled in the art and thus are omitted from description herein. The bus interface provides an interface. The transceiver 800 can be a plurality of elements including a transmitter and a receiver that provide units for communicating with various other devices over a transmission medium including a wireless channel, a wired channel, an optical cable, and the like. For different user devices, the user interface can be an interface capable of externally and internally connecting the necessary devices, and the connected devices include, but are not limited to, numeric keys, a display, a speaker, a microphone, a joystick, and the like.

[0249] The processor 810 manages the bus architecture and normal processing, and the memory 820 can store data used when the processor 810 executes operations.

[0250] Optionally, the processor 810 may be a Central Processing Unit (abbreviated as CPU), an Application Specific Integrated Circuit (abbreviated as ASIC), a Field-Programmable Gate Array (abbreviated as FPGA), or a Complex Programmable Logic Device (abbreviated as CPLD), and the processor 810 may adopt a multi-core architecture.

[0251] The processor 810 executes any one of the methods of FIGS. 1-2 provided by the embodiments of the present disclosure according to the obtained executable instructions by calling a computer program stored in the memory. The processor 810 and the memory 820 may be physically separated and arranged.

[0252] In a possible implementation form, the first received beam corresponds to the first TRP, and the second received beam corresponds to the initial beam of the second TRP.

[0253] In a possible implementation form, the first indication information is a control element (MAC CE) of the first media access control layer. Here, the first MAC CE indicates an identifier of a first control resource set related to the second TRP and a transmission configuration indication (TCI) state index corresponding to the initial beam of the second TRP, and the initial beam of the second TRP corresponds to the first control resource set.

[0254] As a possible implementation form, the first indication information is the second MAC CE and the first downlink control information (DCI), where the second MAC CE indicates a plurality of activated TCI state indexes, and the first DCI indicates one TCI state index corresponding to the initial beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the second MAC CE.

[0255] As a possible implementation form, the first reception beam corresponds to the first TRP, the second reception beam corresponds to the updated beam of the second TRP, or the first reception beam corresponds to the second TRP, and the second reception beam corresponds to the updated beam of the second TRP.

[0256] As a possible implementation form, the first indication information is the third MAC CE, where the third MAC CE indicates an identifier of a second control resource set related to the second TRP and one TCI state index corresponding to the updated beam of the second TRP, and the updated beam of the second TRP corresponds to the second control resource set.

[0257] As a possible implementation form, the first indication information is the fourth MAC CE and the second DCI, where the fourth MAC CE indicates a plurality of activated TCI state indexes, and the second DCI indicates one TCI state index corresponding to the updated beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the fourth MAC CE.

[0258] As a possible implementation form, the plurality of activated TCI state indexes carried by the fourth MAC CE includes one TCI state index corresponding to the initial beam of the second TRP.

[0259] As a possible implementation form, the first DCI and the second DCI include a target indication field for indicating an identifier of a TRP corresponding to a TCI state index and / or a corresponding control resource set pool index.

[0260] As a possible implementation form, in the first DCI and the second DCI, each of the TCI state indexes corresponds to an identifier of one preset TRP and / or corresponds to one control resource set pool index.

[0261] As a possible implementation form, the identifier of the TRP corresponding to the TCI state index in the first DCI and the second DCI and / or the corresponding control resource set pool index are the TRP identifier and / or the control resource set pool index indicated by a MAC CE that activates the TCI state index.

[0262] As a possible implementation form, the processor further executes an operation of determining the first reception beam, where the first reception beam is an initial reception beam of a control resource set CORESET#0 related to the first TRP.

[0263] As a possible implementation form, the processor further executes an operation of receiving second indication information using a known reception beam corresponding to the first TRP, where the second indication information is for determining the first reception beam.

[0264] As a possible implementation form, the known reception beam corresponds to CORESET#0 related to the first TRP, or the known reception beam corresponds to a third control resource set related to the first TRP and is indicated by third indication information transmitted by CORESET#0 related to the first TRP.

[0265] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes one or more TCI state indexes corresponding to an identifier of one TRP, or one or more TCI state indexes corresponding to one control resource set pool index.

[0266] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes a plurality of TCI state indexes corresponding to identifiers of a plurality of TRPs, where each TCI state index has an identifier of the corresponding TRP, or a plurality of TCI state indexes corresponding to a plurality of control resource set pool indexes, where each TCI state index has a control resource set pool index of the corresponding TCI state index.

[0267] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes an indication field corresponding to at least one TCI state index, and the indication field indicates whether the at least one TCI state index exists in the at least one MAC CE.

[0268] It should be noted that the above terminal device provided by the embodiments of the present invention can implement all the method steps of the methods realized in the embodiments of the methods in FIGS. 1 to 2 above, and can achieve the same technical effects. Here, the same parts and beneficial effects as those in the method embodiments of this embodiment will not be specifically described.

[0269] As shown in FIG. 8, it is a schematic configuration diagram of a network device provided by an embodiment of the present disclosure. As shown in FIG. 8, the network device includes a transceiver 900, a processor 910, and a memory 920.

[0270] Here, the memory 920 stores a computer program, the transceiver 900 transmits and receives data under the control of the processor 910, and the processor 910 reads the computer program in the memory 920 and executes an operation of transmitting first instruction information to the terminal device using a first transmission beam. Here, the first instruction information instructs a second reception beam of the terminal device, the first transmission beam corresponds to a first reception beam of the terminal device, the first reception beam corresponds to a first transmit-receive point (TRP) or a second TRP, and the second reception beam corresponds to the second TRP.

[0271] The transceiver 900 transmits and receives data under the control of the processor 910.

[0272] Here, in FIG. 8, the bus architecture can include any number of interconnected buses and bridges to which various circuits of one or more processors represented by the processor 910 and a memory represented by the memory 920 are linked. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are all well known to those skilled in the art and thus will not be described herein. The bus interface provides an interface. The transceiver 900 can be a plurality of elements including a transmitter and a receiver that provide units for communicating with various other devices over a transmission medium including a wireless channel, a wired channel, an optical cable, or the like. The processor 910 manages the bus architecture and normal processing, and the memory 920 can store data used when the processor 910 executes operations.

[0273] The processor 910 may be a CPU, an ASIC, an FPGA, or a CPLD, and the processor 910 may adopt a multi-core architecture.

[0274] As a possible implementation form, the first received beam corresponds to the first TRP, and the second received beam corresponds to the initial beam of the second TRP.

[0275] As a possible implementation form, the first indication information is a control element (MAC CE) of the first media access control layer. Here, the first MAC CE indicates an identifier of a first control resource set related to the second TRP and one transmission configuration indication (TCI) state index corresponding to the initial beam of the second TRP, and the initial beam of the second TRP corresponds to the first control resource set.

[0276] As a possible implementation form, the first indication information is a second MAC CE and first downlink control information (DCI). Here, the second MAC CE indicates a plurality of activated TCI state indexes, the first DCI indicates one TCI state index corresponding to the initial beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the second MAC CE.

[0277] As a possible implementation form, the first received beam corresponds to the first TRP, the second received beam corresponds to the updated beam of the second TRP, or the first received beam corresponds to the second TRP, and the second received beam corresponds to the updated beam of the second TRP.

[0278] As a possible implementation form, the first indication information is a third MAC CE. Here, the third MAC CE indicates an identifier of a second control resource set related to the second TRP and one TCI state index corresponding to the updated beam of the second TRP, and the updated beam of the second TRP corresponds to the second control resource set.

[0279] As a possible implementation form, the first indication information is the fourth MAC CE and the second DCI. Here, the fourth MAC CE indicates a plurality of activated TCI state indexes, and the second DCI indicates one TCI state index corresponding to the updated beam of the second TRP. The one TCI state index is one of the plurality of activated TCI state indexes included in the fourth MAC CE.

[0280] As a possible implementation form, among the plurality of TCI state indexes carried by the fourth MAC CE, one TCI state index corresponding to the initial beam of the second TRP is included.

[0281] As a possible implementation form, the first DCI and the second DCI include a target indication field for indicating the identifier of the TRP corresponding to the TCI state index and / or the corresponding control resource set pool index.

[0282] As a possible implementation form, in the first DCI and the second DCI, each TCI state index corresponds to the identifier of one preset TRP and / or one control resource set pool index.

[0283] As a possible implementation form, the identifier of the TRP corresponding to the TCI state index in the first DCI and the second DCI and / or the corresponding control resource set pool index are the TRP identifier and / or the control resource set pool index indicated by the MAC CE that activates the TCI state index.

[0284] As a possible implementation form, the first reception beam is the initial reception beam corresponding to the control resource set CORESET#0 related to the first TRP.

[0285] In a possible implementation form, the processor further executes an operation of transmitting second instruction information to the terminal device by using a transmission beam corresponding to a known reception beam of the terminal device, where the second instruction information instructs the first reception beam of the terminal device, and the known reception beam corresponds to the first TRP.

[0286] In a possible implementation form, the known reception beam corresponds to CORESET#0 related to the first TRP, or the known reception beam corresponds to a third control resource set related to the first TRP, and is instructed by third instruction information transmitted by CORESET#0 related to the first TRP.

[0287] In a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes one or more TCI state indexes corresponding to an identifier of one TRP, or one or more TCI state indexes corresponding to an index of one control resource set pool.

[0288] In a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes a plurality of TCI state indexes corresponding to identifiers of a plurality of TRPs, where each TCI state index has an identifier of the corresponding TRP, or a plurality of TCI state indexes corresponding to indexes of a plurality of control resource set pools, where each TCI state index has an index of the corresponding control resource set pool.

[0289] As a possible implementation form, at least one of the first MAC CE, the second MAC CE, the third MAC CE, and the fourth MAC CE includes an indication field corresponding to at least one TCI state index, and the indication field indicates whether the at least one TCI state index exists in the at least one MAC CE.

[0290] It should be noted that the above network device provided by the embodiments of the present invention can implement all the method steps of the methods implemented in the embodiments of the methods in FIGS. 3 to 4 above, and can achieve the same technical effects. Here, the same parts and beneficial effects as those of the method embodiments of this embodiment will not be specifically described.

[0291] To implement the above embodiments, the present disclosure further proposes a communication system.

[0292] The communication system provided by the embodiments of the present disclosure includes a terminal device and a network device. The terminal device can implement the beam indication method described in any one of the above 1 to 2, and the network device can implement the beam indication method described in any one of the above 3 to 4.

[0293] To implement the above embodiments, the present disclosure further proposes a computer storage medium.

[0294] The computer storage medium provided by the embodiments of the present disclosure stores an executable program. When the executable program is executed by a processor, the above method as shown in at least one of FIGS. 1 to 4 can be implemented.

[0295] To implement the above embodiments, the present disclosure further proposes a computer program product.

[0296] In the computer program product provided by an embodiment of the present disclosure, when an executable program is executed by a processor, the above method as shown in at least one of FIGS. 1 to 4 can be realized.

[0297] Those skilled in the art can easily conceive of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed in this specification. The present disclosure is intended to cover any variations, uses, or adaptive changes of the present invention, and these variations, uses, or adaptive changes follow the general principles of the present invention and include common general knowledge or commonly used technical means in the technical field not disclosed in the present disclosure. The specification and examples are regarded as merely illustrative, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0298] It should be noted that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A beam indication method, executed by a terminal device, comprising the step of receiving, using a first reception beam, first indication information transmitted from a network device, wherein the first indication information includes a step of indicating a second reception beam, wherein the first reception beam corresponds to a first transmission and reception point (TRP) or a second TRP, and the second reception beam corresponds to the second TRP, wherein the second reception beam is used for transmission of at least two of a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), and a reference signal, characterized in that it is a beam indication method.

2. The first reception beam corresponds to the first TRP, and the second reception beam corresponds to an initial beam of the second TRP, characterized in that it is the beam indication method according to Claim 1.

3. The first indication information is a control element (MAC CE) of a first media access control layer, wherein the first MAC CE indicates an identifier of a first control resource set related to the second TRP and one transmission configuration indication (TCI) state index corresponding to the initial beam of the second TRP, and the initial beam of the second TRP corresponds to the first control resource set, characterized in that it is the beam indication method according to Claim 2.

4. The first indication information is a second MAC CE and a first downlink control information (DCI), wherein the second MAC CE indicates a plurality of activated TCI state indexes, wherein the first DCI indicates one TCI state index corresponding to the initial beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the second MAC CE, characterized in that it is the beam indication method according to Claim 2.

5. The first reception beam corresponds to the first TRP, and the second reception beam corresponds to an updated beam of the second TRP, or the first reception beam corresponds to the second TRP, and the second reception beam corresponds to an updated beam of the second TRP, characterized in that it is the beam indication method according to Claim 1.

6. The first indication information is a third MAC CE, The third MAC CE indicates an identifier of a second control resource set related to the second TRP and one TCI state index corresponding to an updated beam of the second TRP, and the updated beam of the second TRP corresponds to the second control resource set. The beam indication method according to claim 5, characterized in that.

7. The first indication information is a fourth MAC CE and a second DCI, The fourth MAC CE indicates a plurality of activated TCI state indexes, The second DCI indicates one TCI state index corresponding to an updated beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the fourth MAC CE. The beam indication method according to claim 5, characterized in that.

8. In the first DCI and the second DCI, each TCI state index corresponds to an identifier of one preset TRP and / or one control resource set pool index. The beam indication method according to claim 4, characterized in that.

9. A beam indication method, executed by a network device, including the step of transmitting first indication information to a terminal device using a first transmission beam, the first indication information indicates a second reception beam of the terminal device, and the first transmission beam corresponds to a first reception beam of the terminal device, the first reception beam corresponds to a first transmission and reception point (TRP) or a second TRP, and the second reception beam corresponds to the second TRP, the second reception beam is used for transmission of at least two of a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), and a reference signal. The beam indication method, characterized in that.

10. The first reception beam corresponds to the first TRP, and the second reception beam corresponds to an initial beam of the second TRP. The beam indication method according to claim 9, characterized in that.

11. The first indication information is a first media access control layer control element (MAC CE). The first MAC CE indicates an identifier of a first control resource set related to the second TRP and one transmission configuration indication (TCI) state index corresponding to an initial beam of the second TRP, and the initial beam of the second TRP corresponds to the first control resource set. The beam indication method according to claim 10, characterized in that.

12. The first indication information is a second MAC CE and a first downlink control information (DCI), The second MAC CE indicates a plurality of activated TCI state indexes, The first DCI indicates one TCI state index corresponding to the initial beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the second MAC CE. The beam indication method according to claim 10, characterized in that.

13. The first reception beam corresponds to the first TRP, and the second reception beam corresponds to an updated beam of the second TRP, Or, the first reception beam corresponds to the second TRP, and the second reception beam corresponds to an updated beam of the second TRP. The beam indication method according to claim 9, characterized in that.

14. The first indication information is a third MAC CE, The third MAC CE indicates an identifier of a second control resource set related to the second TRP and one TCI state index corresponding to the updated beam of the second TRP, and the updated beam of the second TRP corresponds to the second control resource set. The beam indication method according to claim 13, characterized in that.

15. The first indication information is a fourth MAC CE and a second DCI, The fourth MAC CE indicates a plurality of activated TCI state indexes, The second DCI indicates one TCI state index corresponding to the updated beam of the second TRP, and the one TCI state index is one of the plurality of activated TCI state indexes included in the fourth MAC CE. The beam indication method according to claim 13, characterized in that.

16. In the first DCI and the second DCI, each of the TCI state indexes corresponds to an identifier of one preset TRP and / or corresponds to one control resource set pool index. The beam indication method according to claim 12, characterized in that.

17. A terminal device, comprising a transceiver, a memory, and a processor, wherein the memory stores a computer program, the transceiver transmits and receives data under the control of the processor, and the processor reads the computer program in the memory to implement the method according to any one of claims 1 to 8. A terminal device, characterized in that.

18. A network device, comprising a transceiver, a memory, and a processor, wherein the memory stores a computer program, the transceiver transmits and receives data under the control of the processor, and the processor reads the computer program in the memory to implement the method according to any one of claims 9 to 16. A network device, characterized in that.

19. A computer storage medium storing computer-executable instructions, wherein when the computer-executable instructions are executed by a processor, the method according to any one of claims 1 to 8 is implemented. A computer storage medium, characterized in that.

20. A computer storage medium storing computer-executable instructions, wherein when the computer-executable instructions are executed by a processor, the method according to any one of claims 9 to 16 is implemented. A computer storage medium, characterized in that.

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