Communication method, terminal, network device, and storage medium

Abstract

The present disclosure relates to a communication method, a terminal, a network device, and a storage medium. The communication method comprises: a terminal sends first information to a network device, the first information being used for determining a first transmission configuration indicator (TCI) state, and the first TCI state being used for determining a first beam to be used in communication between the terminal and the network device. The present disclosure effectively reduces the latency of beam updating and reduces the signaling overhead.

Description

Communication method, terminal, network device and storage medium Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to a communication method, a terminal, a network device, and a storage medium. Background Art

[0002] Currently, in New Radio (NR) communications, particularly in Frequency Range (FR) 2, beam-based transmission and reception are required to ensure coverage due to the rapid attenuation of high-frequency channels. Network equipment can send beam indication signaling to terminals, which then determine which beam to transmit or receive based on the signaling.

[0003] Summary of the Invention

[0004] The terminal needs to determine the beam based on the beam indication signaling, resulting in a large delay in beam update.

[0005] The embodiments of the present disclosure provide a communication method, a terminal, a network device, and a storage medium.

[0006] According to a first aspect of an embodiment of the present disclosure, a communication method is proposed, the method comprising: a terminal sends first information to a network device, the first information being used to determine a first transmission configuration indication state TCI state, the first TCI state being used to determine a first beam used by the terminal to communicate with the network device.

[0007] According to a second aspect of an embodiment of the present disclosure, a communication method is proposed, the method comprising: a network device receives first information sent by a terminal, the first information is used to determine a first transmission configuration indication state TCI state, and the first TCI state is used to determine a first beam used by the terminal to communicate with the network device.

[0008] According to a third aspect of an embodiment of the present disclosure, a communication method is proposed, the method comprising: a terminal sending first information to a network device, the first information being used to determine a first transmission configuration indication state TCI state, the first TCI state being used to determine a first beam used by the terminal to communicate with the network device; and the network device receiving the first information.

[0009] According to the fourth aspect of an embodiment of the present disclosure, a terminal is proposed, comprising: a transceiver module, used for the terminal to send first information to a network device, the first information being used to determine a first transmission configuration indication state TCI state, and the first TCI state being used to determine a first beam used by the terminal to communicate with the network device.

[0010] According to the fifth aspect of an embodiment of the present disclosure, a network device is proposed, including: a transceiver module, used for the network device to receive first information sent by a terminal, the first information is used to determine a first transmission configuration indication state TCI state, and the first TCI state is used to determine a first beam used by the terminal to communicate with the network device.

[0011] According to a sixth aspect of an embodiment of the present disclosure, a terminal is proposed, comprising: one or more processors; wherein the terminal is configured to execute the first aspect and any one of the communication methods in the first aspect.

[0012] According to a seventh aspect of an embodiment of the present disclosure, a network device is proposed, comprising: one or more processors; wherein the network device is used to execute the second aspect and any one of the communication methods in the second aspect.

[0013] According to the eighth aspect of an embodiment of the present disclosure, a communication system is proposed, comprising a terminal and a network device, wherein the terminal is configured to implement the first aspect and any one of the communication methods in the first aspect, and the network device is configured to implement the second aspect and any one of the communication methods in the second aspect.

[0014] According to the ninth aspect of an embodiment of the present disclosure, a storage medium is proposed, which stores instructions. When the instructions are executed on a communication device, the communication device executes a communication method such as the first aspect and any one of the first aspects or the second aspect and any one of the second aspects.

[0015] The present disclosure transmits first information from a terminal to a network device, so that the network device determines a transmission configuration indicator state (TCI state) based on the first information. Specifically, the network device determines a beam to be used for communication between the terminal and the network device. This avoids the need for the terminal to provide HARQ ACK feedback for beam indication signaling, effectively reducing beam update latency and signaling consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0017] FIG1 is a schematic diagram showing a communication system architecture according to an embodiment of the present disclosure.

[0018] FIG2 a is a schematic diagram showing interaction of a communication method according to an embodiment of the present disclosure.

[0019] FIG2 b is a schematic diagram showing interaction of a communication method according to an embodiment of the present disclosure.

[0020] FIG2c is a schematic diagram showing interaction of a communication method according to an embodiment of the present disclosure.

[0021] FIG2 d is a schematic diagram showing an interaction of a communication method according to an embodiment of the present disclosure.

[0022] FIG3 a is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0023] FIG3 b is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0024] FIG3 c is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0025] FIG3 d is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0026] FIG3e is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0027] FIG4 a is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0028] FIG4 b is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0029] FIG4 c is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0030] FIG4 d is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0031] FIG4e is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0032] FIG5 is a flow chart showing a communication method according to an embodiment of the present disclosure.

[0033] FIG6 a is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.

[0034] FIG6 b is a schematic structural diagram of a network device according to an embodiment of the present disclosure.

[0035] Fig. 7a is a schematic structural diagram of a communication device according to an exemplary embodiment.

[0036] FIG7 b is a schematic diagram showing a chip structure according to an exemplary embodiment. DETAILED DESCRIPTION

[0037] The embodiments of the present disclosure provide a communication method, a terminal, a network device, and a storage medium.

[0038] In a first aspect, an embodiment of the present disclosure proposes a communication method, which includes: a terminal sends first information to a network device, the first information is used to determine a first transmission configuration indication state TCI state, and the first TCI state is used to determine a first beam used by the terminal to communicate with the network device.

[0039] In the above embodiment, the terminal sends first information to the network device, so that the network device determines the first TCI state based on the first information. Specifically, the network device determines the beam used for communication between the terminal and the network device. This avoids the terminal needing to update the beam determination based on beam indication signaling, effectively reducing beam update latency and signaling consumption.

[0040] In combination with some embodiments of the first aspect, in some embodiments, the method further includes: in response to satisfying a first condition, using a first beam determined by the first TCI state for communication transmission.

[0041] In the above embodiment, after the first condition is met, the first beam can be used for communication transmission, that is, the terminal and the network device can use the new beam for communication transmission at the same time, thereby improving communication efficiency.

[0042] In combination with some embodiments of the first aspect, in some embodiments, the first information includes at least one of the following: a random access message; a scheduling request SR.

[0043] In the above embodiment, the first information may include at least one of a random access message and a scheduling request, that is, the first beam determined by the terminal can be indicated to the network device through at least one of a random access message and a scheduling request, so that the network device can quickly determine the first beam and improve communication efficiency.

[0044] In combination with some embodiments of the first aspect, in some embodiments, the first information includes a random access message, the first information is sent based on a first random access resource, the first random access resource is a random access resource corresponding to a reference signal corresponding to the first TCI state; there is a first corresponding relationship between the random access resource and the reference signal.

[0045] In the above embodiment, when the first information is a random access message, the first information can be sent based on a first random access resource. Since there is a first correspondence between the first random access resource and the reference signal, when the network device receives the first information and determines the corresponding reference signal based on the first random access resource used to send the first information, it can determine the first TCI state corresponding to the reference signal. This enables the network device to efficiently determine the first beam.

[0046] In combination with some embodiments of the first aspect, in some embodiments, the method further includes: receiving second information, where the second information is used to determine the first corresponding relationship.

[0047] In the above embodiment, the network device may configure a first correspondence to the terminal, namely, transmit second information indicating the correspondence between random access resources and reference signals, so that the terminal can determine the first random access resource corresponding to the reference signal based on the reference signal corresponding to the first TCI state. The subsequent transmission of the first information based on the first random access resource can facilitate the network device to determine the first TCI state, that is, facilitate the network device to efficiently determine the first beam.

[0048] In combination with some embodiments of the first aspect, in some embodiments, the random access resource includes at least one of the following: random access time domain resources; random access frequency domain resources; random access preamble code.

[0049] In the above embodiment, different combinations of random access resources can be used to establish a correspondence with a reference signal, which can then be used by the network device to determine the first TCI state. The more random access resources that are combined and associated with the reference signal, the more accurately the first TCI state can be determined, and each resource can be used to indicate a greater number of TCI states.

[0050] In combination with some embodiments of the first aspect, in some embodiments, the first information includes the SR, the first information is sent based on a first SR resource, the first SR resource is the SR resource corresponding to the reference signal corresponding to the first TCI state; there is a second corresponding relationship between the SR resource and the reference signal.

[0051] In the above embodiment, the first information may include an SR. The first information is sent via an SR resource. Since the SR resource and the reference signal have a second correspondence, the network device can efficiently determine the corresponding reference signal based on the SR resource used to send the first information, and determine the first TCI state as the TCI state corresponding to the reference signal. In other words, the network device can efficiently determine the first beam.

[0052] In combination with some embodiments of the first aspect, in some embodiments, the method further includes: receiving third information, where the third information is used to determine the second corresponding relationship.

[0053] In the above embodiment, the network may send third information to the terminal, indicating the correspondence between SR resources and reference signals, to facilitate the terminal determining the SR resources based on the reference signal corresponding to the first TCI state. The subsequent first information sent based on the SR resources may facilitate the network device determining the first TCI state, i.e., facilitate the network device efficiently determining the first beam.

[0054] In combination with some embodiments of the first aspect, in some embodiments, the first condition includes at least one of the following: after a first time threshold starting from the last symbol of the first physical downlink control channel PDCCH is received, the first PDCCH is sent by the network device based on the first beam determined by the first TCI state; after a first time threshold starting from the terminal sending a resource scheduling request SR; after a first time threshold starting from the last symbol of the first PDCCH is received, and no second information is received within the first time threshold, the second information is used to indicate a second TCI state, and the second TCI state is used to determine the second beam used by the terminal to communicate with the network device.

[0055] In the above embodiment, the first condition that is satisfied may be at least one of the above items, so that the network device can quickly determine the first beam and improve communication efficiency.

[0056] In combination with some embodiments of the first aspect, in some embodiments, the first information includes a random access message, the random access process corresponding to the random access message is a non-contention-based random access, and the search space corresponding to the first PDCCH is a search space for TCI state update.

[0057] In the above embodiment, for non-contention-based random access, the network device can send a PDCCH corresponding to the search space for TCI state update, so that when the terminal receives the PDCCH and meets the first condition, it can use the first beam at the same time as the network device.

[0058] In combination with some embodiments of the first aspect, in some embodiments, the first information includes a random access message, the random access process corresponding to the random access message is contention-based random access, and the first PDCCH is a PDCCH used to determine the completion of contention-based random access.

[0059] In the above embodiment, for contention-based random access, upon completion of random access, the network device will provide feedback to the terminal indicating the completion of random access, i.e., the PDCCH used to confirm the completion of contention-based random access. This eliminates the need for the network device to separately send the PDCCH corresponding to the search space used for TCI state update, thereby saving signaling overhead.

[0060] In combination with some embodiments of the first aspect, in some embodiments, the method further includes: in response to receiving fourth information within a first time threshold starting from the last symbol of the first PDCCH, determining a second TCI state based on the fourth information; the fourth information is used to indicate a second TCI state, and the second TCI state is used to determine a second beam used by the terminal to communicate with the network device.

[0061] In the above embodiment, if fourth information indicating the second TCI state is received within a first time threshold after receiving the first PDCCH, communication can be performed using the second beam determined by the second TCI state indicated by the fourth information. This allows the network device to indicate the second TCI state using the fourth information when the base station finds that the first beam is unsuitable for subsequent communication, for example, if the beam is scheduled to another terminal. This allows the terminal to perform subsequent communication based on the second beam.

[0062] In combination with some embodiments of the first aspect, in some embodiments, the method further includes: in response to satisfying a second condition, using a second beam determined by the second TCI state for communication transmission.

[0063] In the above embodiment, the terminal and the network device may communicate using the second beam and may also meet certain conditions to ensure that both the terminal and the network device have time to update the beam.

[0064] In combination with some embodiments of the first aspect, in some embodiments, the second condition includes at least one of the following: the fourth information is the media access control control unit MAC CE, after the second time threshold starting from the receipt of the MAC CE; the fourth information is the downlink control information DCI, after the third time threshold starting from the receipt of the DCI; the fourth information is the DCI, after the fourth time threshold starting from the terminal sending the first hybrid automatic repeat request confirmation HARQ ACK corresponding to the DCI.

[0065] In the above embodiment, the second condition may be at least one of the above items, so as to ensure that both the terminal and the network device have time to update the beam in different scenarios.

[0066] In combination with some embodiments of the first aspect, in some embodiments, the fourth information is DCI, and the DCI is used to schedule a channel or signal, and the channel or signal uses the second beam for communication; the second condition includes at least one of the following: a first time interval is greater than or equal to a fifth time threshold, and the first time interval is the time interval between the DCI and the channel or signal scheduled by the DCI; a second time interval is greater than or equal to a sixth time threshold, and the second time interval is the time interval between the DCI and the second HARQ ACK corresponding to the DCI.

[0067] In the above embodiment, when the fourth information is DCI and the DCI is also used to schedule channels or signals, for the channels or signals scheduled by the DCI, when the interval between the DCI and the channels or signals scheduled by the DCI exceeds a fifth threshold, the second beam determined by the second TCI state indicated by the DCI may be used to transmit the channels or signals scheduled by the DCI. Alternatively, when the interval between the DCI and the HARQ ACK corresponding to the DCI exceeds a sixth threshold, the HARQ ACK corresponding to the DCI may be transmitted using the second beam. This ensures that the terminal and network device have time to update the beam and that the reliability of the used beam is guaranteed.

[0068] In combination with some embodiments of the first aspect, in some embodiments, the fourth information is DCI, and the DCI is used to schedule a channel or signal, the channel or signal uses a first beam for communication, and the first condition includes at least one of the following: the first time interval is less than the fifth time threshold, and after the first time threshold starting from the last symbol of sending the first PDCCH, the first time interval is the time interval between the DCI and the channel or signal scheduled by the DCI; the second time interval is less than the sixth time threshold, and after the first time threshold starting from the last symbol of sending the first PDCCH, the second time interval is the time interval between the DCI and the second HARQ ACK corresponding to the DCI.

[0069] In the above embodiment, if the fourth information is received within the first time threshold, but the time interval between the DCI and the channel or signal scheduled by the DCI does not reach the fifth time threshold, but the first time threshold has been reached since the reception of the first PDCCH, the first beam can be used to avoid waiting time too long and reducing user experience.

[0070] In combination with some embodiments of the first aspect, in some embodiments, the time threshold is determined based on at least one of the following methods: based on fifth information sent by the network device, the fifth information is used to indicate the time threshold; based on the protocol; based on terminal capability information; the time threshold includes at least one of the following: a first time threshold, a second time threshold, a third time threshold, a fourth time threshold, a fifth time threshold, and a sixth time threshold.

[0071] In the above embodiments, each time threshold may be determined based on different methods to improve the efficiency of the communication line.

[0072] In combination with some embodiments of the first aspect, in some embodiments, the communication transmission includes all communication transmissions between the terminal and the network device, or part of the communication transmissions between the terminal and the network device.

[0073] In the above embodiment, the determined beam, the first beam or the second beam can be used for all or part of the communication transmission to adapt to different situations and improve communication efficiency.

[0074] In combination with some embodiments of the first aspect, in some embodiments, sending the first information includes: sending the first information in response to satisfying a third condition.

[0075] In the above embodiment, the sending of the first information may be triggered by the third condition, so that the first information is sent at an appropriate time.

[0076] In combination with some embodiments of the first aspect, in some embodiments, the third condition includes at least one of the following: the measurement result of the current beam is lower than the first threshold value, and the current beam includes at least one of the following: the best beam in the beam measurement report last reported by the terminal, the beam last indicated by the network device, all beams in the beam measurement report last reported by the terminal, and the worst beam in the beam measurement report last reported by the terminal; the measurement result of the candidate beam is higher than the second threshold value, and the candidate beam includes at least one of the following: the non-optimal beam in the beam measurement report last reported by the terminal, the beam other than the beam in the beam measurement report last reported by the terminal, and the beam other than the beam last indicated by the network device; the measurement result of the candidate beam is higher than the measurement result of the current beam, and the measurement result of the candidate beam is higher than the measurement result of the current beam, and the measurement result of the candidate beam is different from the measurement result of the current beam. The difference between the best K beams in the beam measurement report currently reported by the terminal and the best K beams in the beam measurement report most recently reported by the terminal is greater than the third threshold value; the best K beams in the beam measurement report currently reported by the terminal are different from at least one of the best K beams in the beam measurement report most recently reported by the terminal, and K is a positive integer; the best K beams in the beam measurement report currently reported by the terminal do not include the best beam in the beam measurement report most recently reported by the terminal; the best K beams in the beam measurement report currently reported by the terminal do not include the beam most recently indicated by the network device; the difference between the measurement results of at least two best beams between the best K beams in the beam measurement report currently reported by the terminal and the best K beams in the beam measurement report most recently reported by the terminal is greater than the third threshold value; the difference between the measurement results of at least two worst beams between the worst K beams in the beam measurement report currently reported by the terminal and the worst K beams in the beam measurement report most recently reported by the terminal is greater than the third threshold value.

[0077] In the above embodiments, the sending of the first information can be triggered by different conditions to be applicable to different situations, and both can reduce the delay of beam updating and reduce signaling consumption.

[0078] According to a second aspect, a communication method is provided, comprising: a network device receiving first information sent by a terminal, the first information being used to determine a first transmission configuration indication state TCI state, the first TCI state being used to determine a first beam used by the terminal to communicate with the network device.

[0079] In combination with some embodiments of the second aspect, in some embodiments, in response to satisfying a first condition, a first beam determined by the first TCI state is used for communication transmission.

[0080] In combination with some embodiments of the second aspect, in some embodiments, the first information includes at least one of the following: a random access message; a scheduling request SR.

[0081] In combination with some embodiments of the second aspect, in some embodiments, the first information includes a random access message, the first information is received based on a first random access resource, the first random access resource is a random access resource corresponding to the reference signal corresponding to the first TCI state; there is a first corresponding relationship between the random access resource and the reference signal.

[0082] In combination with some embodiments of the second aspect, in some embodiments, before the network device receives the first information sent by the terminal, the method further includes: sending second information, where the second information is used to determine the first corresponding relationship.

[0083] In combination with some embodiments of the second aspect, in some embodiments, the random access resource includes at least one of the following: random access time domain resources; random access frequency domain resources; random access preamble code.

[0084] In combination with some embodiments of the second aspect, in some embodiments, the first information includes the SR, the first information is received based on a first SR resource, the first SR resource is the SR resource corresponding to the reference signal corresponding to the first TCI state; there is a second corresponding relationship between the SR resource and the reference signal.

[0085] In combination with some embodiments of the second aspect, in some embodiments, before the network device receives the first information sent by the terminal, the method further includes: sending third information, where the third information is used to determine the second corresponding relationship.

[0086] In combination with some embodiments of the second aspect, in some embodiments, the first condition includes at least one of the following: after a first time threshold starting from the last symbol of sending the first physical downlink control channel PDCCH, the first PDCCH is sent by the network device based on the first beam determined by the first TCI state; after a first time threshold starting from receiving the resource scheduling request SR sent by the terminal; after a first time threshold starting from the last symbol of sending the first PDCCH, and no fourth information is sent within the first time threshold, the fourth information is used to indicate a second TCI state, and the second TCI state is used to determine the second beam used by the terminal to communicate with the network device.

[0087] In combination with some embodiments of the second aspect, in some embodiments, the first information includes a random access message, the random access process corresponding to the random access message is a non-contention-based random access, and the search space corresponding to the first PDCCH is a search space for TCI state update.

[0088] In combination with some embodiments of the second aspect, in some embodiments, the first information includes a random access message, the random access process corresponding to the random access message is contention-based random access, and the first PDCCH is a PDCCH used to determine the completion of contention-based random access.

[0089] In combination with some embodiments of the second aspect, in some embodiments, the method further includes: in response to sending fourth information within a first time threshold starting from the last symbol of sending the first PDCCH, determining a second TCI state based on the fourth information; the fourth information is used to indicate the second TCI state, and the second TCI state is used to determine the second beam used by the terminal to communicate with the network device.

[0090] In combination with some embodiments of the second aspect, in some embodiments, the method further includes: in response to satisfying a second condition, using a second beam determined by the second TCI state for communication transmission.

[0091] In combination with some embodiments of the second aspect, in some embodiments, the second condition includes at least one of the following: the fourth information is the media access control control unit MAC CE, after the second time threshold from the start of sending the MAC CE; the fourth information is the downlink control information DCI, after the third time threshold from the start of sending the DCI; the fourth information is DCI, after the fourth time threshold from the start of receiving the first hybrid automatic repeat request confirmation HARQ ACK corresponding to the DCI sent by the terminal.

[0092] In combination with some embodiments of the second aspect, in some embodiments, the fourth information is DCI, and the DCI is used to schedule a channel or signal, and the channel or signal uses the second beam for communication; the second condition includes at least one of the following: a first time interval is greater than or equal to a fifth time threshold, and the first time interval is the time interval between the DCI and the channel or signal scheduled by the DCI; a second time interval is greater than or equal to a sixth time threshold, and the second time interval is the time interval between the DCI and the second HARQ ACK corresponding to the DCI.

[0093] In combination with some embodiments of the second aspect, in some embodiments, the fourth information is DCI, and the DCI is used to schedule a channel or signal, the channel or signal uses a first beam for communication, and the first condition includes at least one of the following: the first time interval is less than the fifth time threshold, and after the first time threshold starting from the last symbol of the first PDCCH, the first time interval is the time interval between the DCI and the channel or signal scheduled by the DCI; the second time interval is less than the sixth time threshold, and after the first time threshold starting from the last symbol of the first PDCCH, the second time interval is the time interval between the DCI and the second HARQ ACK corresponding to the DCI.

[0094] In combination with some embodiments of the second aspect, in some embodiments, the time threshold is determined based on at least one of the following methods: based on network equipment; based on a protocol; based on terminal capability information; the time threshold includes at least one of the following: a first time threshold, a second time threshold, a third time threshold, a fourth time threshold, a fifth time threshold, and a sixth time threshold.

[0095] In combination with some embodiments of the second aspect, in some embodiments, the communication transmission includes all communication transmissions between the terminal and the network device, or part of the communication transmissions between the terminal and the network device.

[0096] In combination with some embodiments of the second aspect, in some embodiments, receiving the first information includes: receiving the first information in response to satisfying a third condition.

[0097] In combination with some embodiments of the second aspect, in some embodiments, the third condition includes at least one of the following: the measurement result of the current beam is lower than the first threshold value, and the current beam includes at least one of the following: the best beam in the beam measurement report most recently reported by the terminal, the beam most recently indicated by the network device, all beams in the beam measurement report most recently reported by the terminal, and the worst beam in the beam measurement report most recently reported by the terminal; the measurement result of the candidate beam is higher than the second threshold value, and the candidate beam includes at least one of the following: the non-optimal beam in the beam measurement report most recently reported by the terminal, the beam other than the beam in the beam measurement report most recently reported by the terminal, and the beam other than the beam most recently indicated by the network device; the measurement result of the candidate beam is higher than the measurement result of the current beam, and the measurement result of the candidate beam is different from the measurement result of the current beam. The difference between the best K beams in the beam measurement report currently reported by the terminal and the best K beams in the beam measurement report most recently reported by the terminal is greater than the third threshold value; the best K beams in the beam measurement report currently reported by the terminal are different from at least one of the best K beams in the beam measurement report most recently reported by the terminal, and K is a positive integer; the best K beams in the beam measurement report currently reported by the terminal do not include the best beam in the beam measurement report most recently reported by the terminal; the best K beams in the beam measurement report currently reported by the terminal do not include the beam most recently indicated by the network device; the difference between the measurement results of at least two best beams between the best K beams in the beam measurement report currently reported by the terminal and the best K beams in the beam measurement report most recently reported by the terminal is greater than the third threshold value; the difference between the measurement results of at least two worst beams between the worst K beams in the beam measurement report currently reported by the terminal and the worst K beams in the beam measurement report most recently reported by the terminal is greater than the third threshold value.

[0098] According to a third aspect, a communication method is provided, comprising: a terminal sending first information to a network device, wherein the first information is used to determine a first transmission configuration indication state TCI state, and the first TCI state is used to determine a first beam used by the terminal to communicate with the network device; and the network device receives the first information.

[0099] According to the fourth aspect of an embodiment of the present disclosure, a terminal is provided, including: a transceiver module, used for the terminal to send first information to a network device, the first information is used to determine a first transmission configuration indication state TCI state, and the first TCI state is used to determine a first beam used by the terminal to communicate with the network device.

[0100] According to the fifth aspect of an embodiment of the present disclosure, a network device is provided, including: a transceiver module, used for the network device to receive first information sent by a terminal, the first information is used to determine a first transmission configuration indication state TCI state, and the first TCI state is used to determine a first beam used by the terminal to communicate with the network device.

[0101] According to a sixth aspect of an embodiment of the present disclosure, a terminal is provided, comprising: one or more processors; wherein the terminal is configured to execute the first aspect and any one of the communication methods in the first aspect.

[0102] According to a seventh aspect of an embodiment of the present disclosure, a network device is provided, comprising: one or more processors; wherein the network device is configured to execute the second aspect and any one of the communication methods in the second aspect.

[0103] According to the eighth aspect of an embodiment of the present disclosure, a communication system is provided, including a terminal and a network device, wherein the terminal is configured to implement the first aspect and any one of the communication methods in the first aspect, and the network device is configured to implement the second aspect and any one of the communication methods in the second aspect.

[0104] According to the ninth aspect of an embodiment of the present disclosure, a storage medium is provided, which stores instructions. When the instructions are executed on a communication device, the communication device executes a communication method such as the first aspect and any one of the first aspects or the second aspect and any one of the second aspects.

[0105] According to a tenth aspect of an embodiment of the present disclosure, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the optional implementation manner of the first aspect or the second aspect.

[0106] According to an eleventh aspect of the embodiments of the present disclosure, the embodiments of the present disclosure propose a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first aspect or the second aspect.

[0107] According to a twelfth aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a chip or a chip system, wherein the chip or chip system includes a processing circuit configured to execute the method described in the optional implementation of the first or second aspect.

[0108] It is understandable that the terminal, access network device, first network element, other network elements, core network device, communication system, storage medium, program product, computer program, chip, or chip system involved in each embodiment of the present disclosure are all used to perform the method proposed in the embodiment of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding method and will not be repeated here.

[0109] The present disclosure provides communication methods, devices, equipment, and storage media. In some embodiments, the terms "communication method," "information processing method," and "communication method" are interchangeable; the terms "communication device," "information processing device," and "communication device" are interchangeable; and the terms "information processing system," "communication system," and "communication system" are interchangeable.

[0110] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0111] In each embodiment of the present disclosure, unless otherwise specified or provided for, the terms and / or descriptions between the embodiments are consistent and may be referenced by each other. The technical environments in different embodiments may be combined to form new embodiments based on their inherent logical relationships.

[0112] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0113] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0114] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0115] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0116] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0117] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0118] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for example, if the description object is "information", then the "first information" and "the performance of each AI model" can be the same information or different information, and their contents can be the same or different.

[0119] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0120] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0121] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0122] In some embodiments, devices and equipment can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0123] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0124] In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", and in some embodiments may also be understood as "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission and / or reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", etc.

[0125] In some embodiments, "terminal" or "terminal device" may be referred to as "user equipment (UE)", "user terminal" "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc.

[0126] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0127] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0128] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0129] FIG1 is a schematic diagram showing a communication system architecture according to an embodiment of the present disclosure.

[0130] As shown in FIG1 , a communication system 100 includes a terminal 101 and a network device 102 .

[0131] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0132] In some embodiments, the network device 102 may include at least one of an access network device and a core network device.

[0133] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.

[0134] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0135] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0136] In some embodiments, a core network device may be a device including one or more network elements, or may be multiple devices or device groups, each including all or part of the one or more network elements. The network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0137] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0138] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or a portion thereof, but are not limited thereto. The entities shown in FIG1 are illustrative only. The communication system may include all or part of the entities shown in FIG1 , or may include other entities outside of FIG1 . The number and form of the entities are arbitrary, and the entities may be physical or virtual. The connection relationships between the entities are illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0139] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0140] Currently, in New Radio (NR) communications, particularly in Frequency Range (FR) 2, beam-based transmission and reception are required to ensure coverage due to the rapid attenuation of high-frequency channels. Network equipment can send beam indication signaling to terminals, which then determine which beam to transmit or receive based on the signaling.

[0141] In some embodiments, the beam indication signaling may include a medium access control control element (MAC CE) or downlink control information (DCI). For example, the beam of the physical downlink control channel (PDCCH) or the physical uplink control channel (PUCCH) may be indicated by the MAC CE. For another example, the physical downlink shared channel (PDSCH) or the physical uplink shared channel (PUSCH) may be indicated by the DCI. For another example, the beam of each reference signal may be indicated by the MAC CE or the DCI. Reference signals include, but are not limited to, a channel state information reference signal (CSI-RS), a sounding reference signal (SRS), and a tracking reference signal (TRS). Moreover, the beam of each channel or reference signal is independently indicated.

[0142] In some embodiments, the beam includes a common beam or a unified transmission configuration indicator state (unified TCI state). Common beam or unified TCI state indicates that multiple channels or reference signals use the same beam. Using a single beam indication signaling indicates a common beam for multiple channels or reference signals. For example, a common beam can also be indicated by a MAC CE or DCI. When a common beam is indicated by DCI, HARQ ACK feedback is required for the DCI used for beam indication to improve DCI reliability. This results in a longer beam update delay and high signaling overhead.

[0143] In some embodiments, if beam information cannot be obtained according to beam indication signaling, a default beam is used, and the default beam is the same as the beam of the control resource set (CORESET) corresponding to a certain PDCCH. Or when the terminal has two unified TCI states, the default beam is the first or second or both unified TCI states. The unified TCI state includes a joint transmission configuration indicator state (joint TCI state), and the joint TCI state can be used for transmission of uplink and downlink channels / signals at the same time; or the unified TCI state includes at least one of a downlink transmission configuration indicator state (DL TCI state) and an uplink transmission configuration indicator state (UL TCI state), and the DL TCI state can be used for transmission of downlink channels / signals, and the UL TCI state can be used for transmission of uplink channels / signals.

[0144] FIG2a is a schematic diagram illustrating an interaction of a communication method according to an embodiment of the present disclosure. As shown in FIG2a , the present disclosure embodiment relates to a communication method for use in a communication system 100, the method comprising:

[0145] Step S2101 , the network device 102 sends second information to the terminal 101 .

[0146] In some embodiments, the terminal 101 receives second information sent by the network device 102 .

[0147] In some embodiments, the second information is used to determine a first corresponding relationship, where the first corresponding relationship indicates a corresponding relationship between a random access resource and a reference signal resource. The terminal may determine a first random access resource for a reference signal corresponding to a first transmission configuration indicator state (TCI state) based on the first corresponding relationship indicated by the second information. When the reference signal resource corresponding to the quasi co-location (QCL) type (Type) D indicated by the first TCI state is a resource corresponding to a synchronization signal block (SSB), the first random access resource is a random access resource corresponding to the SSB. When the reference signal resource corresponding to the QCL Type D indicated by the first TCI state is a resource corresponding to a CSI-RS, the first random access resource is a random access resource corresponding to the SSB corresponding to the CSI-RS.

[0148] In some embodiments, reference signals and reference signal resources can be interchanged. For example, SSBs can be interchanged with SSB resources, and CSI-RSs can be interchanged with CSI-RS resources.

[0149] In some embodiments, the random access resource may include a random access channel occasion (RO), a random access preamble, etc. The random access occasion includes at least one of the following: a random access time domain resource; a random access frequency domain resource.

[0150] In some embodiments, the random access resource includes at least one of the following: a random access time domain resource; a random access frequency domain resource; and a random access preamble.

[0151] Optionally, the random access resource includes a random access time domain resource. That is, the first correspondence may be a correspondence between the random access time domain resource and the reference signal. The terminal may determine the random access time domain resource of the reference signal. That is, in the random access process to be triggered, the first random access time domain resource based on the reference signal corresponding to the first TCI state is used. Other random access resources, such as random access frequency domain resources, may be any random access frequency domain resource. It will be understood that in this embodiment, the reference signals corresponding to the same random access time domain resource and different random access frequency domain resources may be the same.

[0152] Optionally, the random access resource includes a random access frequency domain resource. That is, the first correspondence may be a correspondence between a random access frequency domain resource and a reference signal. The terminal may determine a first random access frequency domain resource for the reference signal. That is, in the random access process to be triggered, the first random access frequency domain resource based on the reference signal corresponding to the first TCI state is used. Other random access resources, such as random access time domain resources, may be any random access time domain resource. It will be understood that in this embodiment, the reference signals corresponding to the same random access frequency domain resource and different random time domain resources may be the same.

[0153] Optionally, the random access resource includes a random access preamble. That is, the first correspondence may be a correspondence between a random access preamble and a reference signal. The terminal may determine a first random access preamble of the reference signal. That is, in the random access process to be triggered, the first random access preamble based on the reference signal corresponding to the first TCI state is used. Other random access resources, such as random access time domain resources, may be any random access time domain resource. It will be understood that in this embodiment, the reference signals corresponding to the same random access preamble and different random access time-frequency domain resources may be the same.

[0154] Optionally, the random access resources include random access time domain resources and random access frequency domain resources. That is, the first correspondence may be a correspondence between a reference signal and random access time domain resources and a random access frequency domain resource. The terminal may determine the random access time domain resources and the random access frequency domain resources of the reference signal. That is, in the random access process to be triggered, the first random access time domain resource based on the reference signal corresponding to the first TCI state is used. For other random access resources, such as a random access preamble, any random access preamble may be used. It can be understood that the reference signals corresponding to the same random access time domain resource and different random access frequency domain resources may be different in this embodiment. The reference signals corresponding to the same random access frequency domain resource and different random access time domain resources may be different in this embodiment. The reference signals corresponding to the same random frequency domain resource and the same random time domain resource are the same in this embodiment.

[0155] Optionally, the random access resource includes a random access time domain resource and a random access preamble. That is, the first correspondence may be a correspondence between a reference signal and a random access time domain resource and a random access preamble. The terminal may determine the random access time domain resource and the random access preamble of the reference signal. That is, in the random access process to be triggered, the first random access time domain resource and the first random access preamble based on the reference signal corresponding to the first TCI state are used. For other random access resources, such as random access frequency domain resources, any random access frequency domain resource may be used. It can be understood that the reference signals corresponding to the same random access time domain resource and different random access preambles may be different in this embodiment. The reference signals corresponding to the same random access preamble and different random access time domain resources may be different in this embodiment. The same random access time domain resource and the same random access frequency domain resource may be the same in this embodiment.

[0156] Optionally, the random access resource includes a random access frequency domain resource and a random access preamble. That is, the first correspondence may be a correspondence between a reference signal and random access frequency domain resources and a random access preamble. The terminal may determine the random access frequency domain resource and the random access preamble of the reference signal. That is, in the random access process to be triggered, the first random frequency domain resource and the first random access preamble based on the reference signal corresponding to the first TCI state are used. It can be understood that the reference signals corresponding to the same random access frequency domain and different random access preambles may be different in this embodiment. The reference signals corresponding to the same random access preamble and different random access frequency domain resources are in this embodiment. The same random access frequency domain resource and the same random access preamble are the same in this embodiment.

[0157] Optionally, the random access resources include random access time domain resources, random access frequency domain resources, and random access preambles. That is, in this embodiment, the reference signals corresponding to the same random access time domain resources, the same random access frequency domain resources, and the same random access preambles are the same.

[0158] In some embodiments, the terminal sends first information during a random access process to be triggered. The first information is used to determine a first TCI state, which is used to determine a first beam used by the terminal to communicate with the network device.

[0159] In some embodiments, the name of the second information is not limited, and it can be, for example, "instruction information", "configuration information", etc.

[0160] In some embodiments, the name of the first information is not limited, and it can be, for example, "instruction information", "configuration information", etc.

[0161] In some embodiments, a beam may be referred to as a spatial Rx parameter, a quasi-co location Type D (QCL Type D), a spatial setting, a spatial reception filter, a spatial transmission filter, or a spatial domain filter.

[0162] In some embodiments, TCI state can be interchanged with beam.

[0163] In some embodiments, the first TCI state may also be used to determine transmit power-related parameters corresponding to uplink communications, including parameters P0, Alpha, and power adjustment state. Uplink communications include transmissions of PUCCH, PUSCH, and SRS.

[0164] In step S2102, the terminal 101 determines a first random access resource corresponding to a reference signal corresponding to a first TCI state based on a first corresponding relationship.

[0165] In some embodiments, the terminal may determine, based on the first correspondence, a first random access resource for a reference signal corresponding to the first TCI state. The first random access resource includes at least one of the following: a random access time domain resource; a random access frequency domain resource; or a random access preamble. For a detailed implementation, reference may be made to the embodiment in step S2101, and this disclosure will not be further elaborated herein.

[0166] In some embodiments, a terminal may determine a first TCI state. For example, the first TCI state may be determined based on a beam measurement result of the terminal. The terminal may determine, based on the first correspondence, a first random access resource for a reference signal corresponding to the first TCI state. The first random access resource is used to send first information during a to-be-triggered random access procedure.

[0167] In some embodiments, the terminal may send first information during a triggered random access procedure based on the determined first random access resource. The first information is used to determine a first TCI state. That is, the network device receives the first information and may determine the first TCI state based on the first information. The first TCI state is used to determine a first beam used for communication between the terminal and the network device. That is, the network device may determine the first beam used for communication between the terminal and the network device based on the first TCI state.

[0168] Step S2103 , the terminal 101 sends first information to the network device 102 .

[0169] In some embodiments, the network device 102 receives the first information sent by the terminal 101 .

[0170] In some embodiments, the first information is used to determine a first TCI state. That is, the network device receives the first information and may determine the first TCI state based on the first information. The first TCI state is used to determine a first beam used for communication between the terminal and the network device. That is, the network device may determine the first beam used for communication between the terminal and the network device based on the first TCI state.

[0171] In some embodiments, the first information includes a random access message. That is, the terminal may send the first information during a random access procedure.

[0172] In some embodiments, the first information may be at least one of the following: message (Msg) 1, Msg A.

[0173] In some embodiments, the first information may be Msg 1, where Msg 1 includes a random access preamble code sent by the terminal.

[0174] In some embodiments, the first information may be Msg A, which includes Msg 1 and PUSCH.

[0175] In some embodiments, the terminal 101 sends the first information to the network device 102 based on the first random access resource. The first random access resource is a random access resource corresponding to the reference signal corresponding to the first TCI state.

[0176] In some embodiments, the first information is sent in response to a third condition being satisfied.

[0177] In some examples, in response to the third condition being met, a random access procedure is triggered, and the first information is sent during the random access procedure.

[0178] In some embodiments, the third condition includes at least one of the following: a measurement result of a current beam is lower than a first threshold value, and the current beam includes at least one of the following: the best beam in the beam measurement report most recently reported by the terminal, the beam most recently indicated by the network device, all beams in the beam measurement report most recently reported by the terminal, and the worst beam in the beam measurement report most recently reported by the terminal; a measurement result of a candidate beam is higher than a second threshold value, and the candidate beam includes at least one of the following: a non-optimal beam in the beam measurement report most recently reported by the terminal, a beam other than the beam in the beam measurement report most recently reported by the terminal, and a beam other than the beam most recently indicated by the network device; the measurement result of the candidate beam is higher than the measurement result of the current beam, and the difference between the measurement result of the candidate beam and the measurement result of the current beam is greater than a third threshold value; The best K beams in the beam measurement report currently reported by the terminal are different from at least one of the best K beams in the beam measurement report most recently reported by the terminal, where K is a positive integer; the best K beams in the beam measurement report currently reported by the terminal do not include the best beam in the beam measurement report most recently reported by the terminal; the best K beams in the beam measurement report currently reported by the terminal do not include the beam most recently indicated by the network device; the difference in measurement results of at least two best beams between the best K beams in the beam measurement report currently reported by the terminal and the best K beams in the beam measurement report most recently reported by the terminal is greater than a third threshold value; the difference in measurement results of at least two worst beams between the worst K beams in the beam measurement report currently reported by the terminal and the worst K beams in the beam measurement report most recently reported by the terminal is greater than a third threshold value.

[0179] Optionally, when the measurement result of the current beam is lower than a first threshold value, the first information may be sent. For example, a random access process may be triggered, and the first information may be sent during the random access process. The current beam includes at least one of the following: the best beam in the most recent beam measurement report reported by the terminal, the beam most recently indicated by the network device, all beams in the most recent beam measurement report reported by the terminal, and the worst beam in the most recent beam measurement report reported by the terminal.

[0180] Optionally, when the measurement result of the candidate beam is higher than the second threshold value, the first information can be sent. For example, a random access process can be triggered, and the first information can be sent during the random access process. The candidate beam includes one of the following: a non-optimal beam in the beam measurement report most recently reported by the terminal, a beam other than the beam in the beam measurement report most recently reported by the terminal, and a beam other than the beam most recently indicated by the network device. For example, if the current beam is the best beam in the beam measurement report most recently reported by the terminal, the candidate beam can be a non-optimal beam in the beam measurement report most recently reported by the terminal, or a beam other than the beam in the beam measurement report most recently reported by the terminal. For another example, if the current beam is the beam most recently indicated by the network device, the candidate beam can be a beam other than the beam most recently indicated by the network device. For another example, if the current beam is all beams in the beam measurement report most recently reported by the terminal, the candidate beam can be a beam other than the beam in the beam measurement report most recently reported by the terminal. For another example, if the current beam is the worst beam in the most recent beam measurement report reported by the terminal, the candidate beam may be a beam other than the worst beam in the most recent beam measurement report reported by the terminal.

[0181] Optionally, when the measurement result of the candidate beam is higher than the measurement result of the current beam, and the difference between the measurement result of the candidate beam and the measurement result of the current beam is greater than a third threshold value, the first information can be sent. For example, a random access process can be triggered, and the first information can be sent during the random access process. For example, if the measurement result of the candidate beam is not higher than the second threshold value, but the difference between the measurement result of the candidate beam and the measurement result of the current beam is greater than the third threshold value, the first information can be sent. That is, it can be considered that the conditions for beam updating are also met at this time. Beam updating means that the terminal and the network device use a new beam to communicate. The new beam can be the first beam in the above embodiment.

[0182] Optionally, when the best K beams in the beam measurement report currently reported by the terminal are different from at least one of the best K beams in the beam measurement report most recently reported by the terminal, the first information can be sent. For example, a random access process can be triggered, and the first information can be sent during the random access process. K is a positive integer. That is, the best beam in the beam measurement report can be one or more. When the best K beams in the beam measurement report currently reported by the terminal are different from at least one of the best K beams in the beam measurement report most recently reported by the terminal, the first information can be sent. For example, the best beams in the beam measurement report currently reported by the terminal are A, B, and C, respectively, while the best beams in the beam measurement report most recently reported by the terminal are A, B, and D. The best beam in the beam measurement report currently reported by the terminal includes C, while the best beam in the beam measurement report most recently reported by the terminal includes D. If there is a difference, the first information can be sent.

[0183] Optionally, when the best K beams in the beam measurement report currently reported by the terminal do not include the best beam in the beam measurement report most recently reported by the terminal, the first information may be sent. For example, a random access process may be triggered, and the first information may be sent during the random access process. The best beam in the beam measurement report most recently reported by the terminal may be one or more, may be K, or may not be K. For example, if the best beam in the beam measurement report most recently reported by the terminal is A, and if A is not included in the K best beams in the beam measurement report currently reported by the terminal, the first information may be sent. For another example, if the best beams in the beam measurement report most recently reported by the terminal are A and B, and if A is included but B is not included in the K best beams in the beam measurement report currently reported by the terminal, the first information may be sent.

[0184] Optionally, when the best K beams in the beam measurement report currently reported by the terminal do not include the beam most recently indicated by the network device, the first information may be sent. For example, a random access process may be triggered, and the first information may be sent during the random access process. For example, if the beam most recently indicated by the network device is A, and the best K beams in the beam measurement report currently reported by the terminal do not include A, the first information may be sent. For another example, if the beams most recently indicated by the network device are A and B, and the K best beams in the beam measurement report currently reported by the terminal include A but not B, the first information may be sent.

[0185] Optionally, when the difference between the measurement results of at least two of the best K beams in the beam measurement report currently reported by the terminal and the best K beams in the beam measurement report most recently reported by the terminal is greater than a third threshold value, the first information can be sent. For example, a random access process can be triggered, and the first information can be sent during the random access process. For example, beam A is among the best K beams in the beam measurement report currently reported by the terminal, and beam B is among the best K beams in the beam measurement report most recently reported by the terminal, and the difference between the measurement result of beam A and the measurement result of beam B is greater than the third threshold value. As long as there is a set of such A and B, the first information can be sent.

[0186] Optionally, if the difference between the measurement results of at least two of the worst K beams in the beam measurement report currently reported by the terminal and the worst K beams in the beam measurement report most recently reported by the terminal is greater than a third threshold value, the first information can be sent. For example, a random access process can be triggered, and the first information is sent during the random access process. For example, beam A exists among the worst K beams in the beam measurement report currently reported by the terminal, and beam B exists among the worst K beams in the beam measurement report most recently reported by the terminal, and the difference between the measurement result of beam A and the measurement result of beam B is greater than the third threshold value. As long as there is a set of such A and B, the first information can be sent.

[0187] In some embodiments, the first threshold value may be smaller than the second threshold value.

[0188] Step S2104 : The network device 102 sends a first PDCCH to the terminal 101 .

[0189] In some embodiments, the terminal 101 receives a first PDCCH sent by a network device.

[0190] In some embodiments, the first PDCCH is used to assist in determining whether a first condition is met. When the first condition is met, the terminal and the network device can communicate using the first beam.

[0191] In some embodiments, the network device transmits the first PDCCH using a first beam. Specifically, after receiving the first information and determining the first TCI state based on the first information, and then determining the first beam based on the first TCI state, the network device may transmit the first PDCCH using the first beam. For example, the network device determines a reference signal corresponding to the first random access resource based on the first correspondence, and determines the beam corresponding to the first TCI state based on the reference signal.

[0192] In some embodiments, the first information includes a random access message. If the random access process corresponding to the random access message is a non-contention-based random access. That is, the first information is sent in a non-contention-based random access process. The search space (SS) corresponding to the first PDCCH is the SS used for TCI state update. Among them, TCI state update can also be understood as beam update. That is, the search space corresponding to the first PDCCH is sent by a PDCCH specifically for beam update, that is, after sending the first information, the terminal only needs to monitor the PDCCH in the search space dedicated to beam update, and does not need to monitor all search spaces.

[0193] In some embodiments, the first information includes a random access message. If the random access procedure corresponding to the random access message is contention-based random access, that is, the first information is sent during the contention-based random access procedure. The first PDCCH is a PDCCH used to determine the completion of contention-based random access. That is, for contention-based random access, when the contention-based random access is completed, the network device sends a PDCCH to the terminal to determine the completion of contention-based random access. This PDCCH can be used as the first PDCCH to assist in determining that the first condition is satisfied.

[0194] In some embodiments, the first condition includes at least one of the following: after a first time threshold starting from the last symbol of the first PDCCH is received, the first PDCCH is sent by the first beam determined by the network device based on the first TCI state; after the first time threshold starting from the last symbol of the first PDCCH is received, and no fourth information is received within the first time threshold, the fourth information is used to indicate a second TCI state, and the second TCI state is used to determine the second beam used by the terminal to communicate with the network device.

[0195] Optionally, after a first time threshold from the last symbol of the first PDCCH is received, the terminal and the network device use the first beam for communication. For example, the terminal starts communicating with the network device using the first beam after the first time threshold from the last symbol of the first PDCCH is received. The network device starts communicating with the terminal using the first beam after the first time threshold from the last symbol of the first PDCCH is sent. That is, the terminal and the network device start using the first beam together after the first time threshold from the last symbol of the PDCCH.

[0196] Optionally, after a first time threshold starting from the last symbol of the first PDCCH is received, the terminal and the network device use the first beam for communication. Furthermore, no fourth information is received within the first time threshold. The fourth information is used to indicate a second TCI state. The second TCI state is used to determine a second beam used by the terminal and the network device for communication. The fourth information may be beam indication signaling. That is, within a first time threshold starting from the last symbol of the first PDCCH is received, the network device does not send beam indication signaling to the terminal, and after the first time threshold, the terminal and the network device use the first beam for communication.

[0197] In some embodiments, the terminal may start timing from the last symbol of the first PDCCH received, and the network device may start timing from the last symbol of the first PDCCH sent. After a first time threshold, the terminal and the network device communicate using the first beam.

[0198] In some embodiments, the terminal may start timing from the last symbol of the first PDCCH received and stop timing when receiving the fourth information sent by the network device. The network device may start timing from the last symbol of the first PDCCH sent and stop timing when sending the fourth information.

[0199] Step S2105: The terminal and the network device communicate using the first beam.

[0200] In some embodiments, the terminal and the network device may communicate using a first beam determined by a first TCI state.

[0201] In some embodiments, in response to satisfying a first condition, the terminal and the network device use a first beam to communicate. The first condition includes at least one of the following: after a first time threshold starting from the last symbol of the first PDCCH is received, the first PDCCH is sent by the network device based on the first beam determined by the first TCI state; after a first time threshold starting from the last symbol of the first PDCCH is received, and no fourth information is received within the first time threshold, the fourth information is used to indicate a second TCI state, and the second TCI state is used to determine the second beam used by the terminal to communicate with the network device. For specific implementation, please refer to the embodiment of step S2104, which will not be repeated in this disclosure.

[0202] In some embodiments, if the fourth information is received within the first time threshold, that is, the first condition is not met, the terminal and the network device may communicate using a second beam, where the second beam is a beam determined by a second TCI state indicated by the fourth information.

[0203] In some embodiments, after receiving the fourth information, the terminal may, in response to satisfying the second condition, use the second beam determined by the second TCI state for communication transmission.

[0204] In some embodiments, the fourth information includes at least one of the following: MAC CE, DCI.

[0205] In some embodiments, the second condition includes at least one of the following: the fourth information is MAC CE, after the second time threshold from the receipt of MAC CE; the fourth information is downlink control information DCI, after the third time threshold from the receipt of DCI; the fourth information is DCI, after the fourth time threshold from the terminal sending the first hybrid automatic repeat request confirmation HARQ ACK corresponding to the DCI.

[0206] Optionally, if the fourth information is a MAC CE, the terminal and the network device may communicate using a second beam determined by a second TCI state indicated by the MAC CE after a second time threshold from the time the MAC CE is received. For example, the terminal may communicate with the network device using the second beam after the second time threshold from the time the MAC CE is received. The network device may communicate with the terminal using the second beam after the second time threshold from the time the MAC CE is sent.

[0207] Optionally, if the fourth information is DCI, after a third time threshold from the start of receiving the DCI, the terminal and the network device may communicate using the second beam determined by the second TCI state indicated by the MAC CE. For example, for the terminal, after a third time threshold from the start of receiving the DCI, communication with the network device begins using the second beam. For the network device, after a third time threshold from the start of sending the DCI, communication with the terminal begins using the second beam.

[0208] Optionally, if the fourth information is DCI, and the terminal sends a first HARQ ACK corresponding to the DCI to the network device, the terminal and the network device may communicate using the second beam after a fourth time threshold from the start of sending the first HARQ ACK. For example, the terminal may begin communicating with the network device using the second beam after the fourth time threshold from the start of sending the first HARQ ACK. The network device may begin communicating with the terminal using the second beam after the fourth time threshold from the start of receiving the first HARQ ACK.

[0209] Optionally, after receiving the MAC CE and decoding the second time threshold for the start of the second TCI state contained in the MAC CE, the terminal and the network device may communicate using the second beam determined by the second TCI state indicated by the MAC CE.

[0210] Optionally, after receiving the DCI and decoding the second time threshold for the start of the second TCI state contained in the DCI, the terminal and the network device may communicate using the second beam determined by the second TCI state indicated by the DCI.

[0211] In some embodiments, the fourth information is DCI, and the DCI is used to schedule a channel or signal, the channel or signal uses a second beam for communication, and the second condition includes at least one of the following: the first time interval is greater than or equal to a fifth time threshold, and the first time interval is the time interval between the DCI and the channel or signal scheduled by the DCI; the second time interval is greater than or equal to the sixth time threshold, and the second time interval is the time interval between the DCI and the second HARQ ACK corresponding to the DCI.

[0212] In some embodiments, DCI can be used to indicate a second TCI state and to schedule channels or signals. When the following second condition is met, the second beam can be used to transmit the DCI-scheduled channels and signals: a first time interval is greater than or equal to a fifth time threshold, where the first time interval is the time interval between the DCI and the DCI-scheduled channel or signal. For example, if the time interval between the time a terminal receives DCI and the time it transmits the DCI-scheduled signal or channel is greater than or equal to the fifth threshold, the second beam can be used for communication.

[0213] In some embodiments, DCI can be used to indicate a second TCI state and to schedule channels or signals. A HARQ ACK corresponding to the DCI can be sent using a second beam when the following second condition is met: the second time interval is greater than or equal to a sixth time threshold, where the second time interval is the time interval between the DCI and the second HARQ ACK corresponding to the DCI. For example, if the time interval between the time a terminal receives the DCI and the time it sends the second HARQ ACK corresponding to the DCI is greater than or equal to the sixth time threshold, the second beam can be used for communication.

[0214] In some embodiments, the fourth information is DCI, and the DCI is used to schedule a channel or signal, and the channel or signal uses a first beam for communication, and the first condition includes at least one of the following: the first time interval is less than a fifth time threshold, and after the first time threshold starting from the last symbol of the first PDCCH, the first time interval is the time interval between the DCI and the channel or signal scheduled by the DCI; the second time interval is less than a sixth time threshold, and after the first time threshold starting from the last symbol of the first PDCCH, the second time interval is the time interval between the DCI and a second HARQ ACK corresponding to the DCI. That is, in response to the first time interval being less than the fifth time threshold and after the first time threshold starting from the last symbol of the first PDCCH being received, the first beam determined by the first TCI state is used for communication transmission; or in response to the second time interval being less than the sixth time threshold and after the first time threshold starting from the last symbol of the first PDCCH being received, the first beam determined by the first TCI state is used for communication transmission.

[0215] Optionally, for a DCI-scheduled channel or signal, a first beam may be used for communication transmission, where the corresponding first condition is that the first time interval is less than the fifth time threshold and is after the first time threshold from the last symbol of the first PDCCH is received. That is, when the first time interval between the DCI and the DCI-scheduled channel or signal is less than the fifth time threshold, i.e., the second condition is not met, then the first beam determined by the first TCI state is used for communication transmission after the first time threshold from the last symbol of the first PDCCH is received.

[0216] Optionally, for the second HARQ ACK corresponding to the DCI, the first beam may be used for communication transmission, and the corresponding first condition is that the second time interval is less than the sixth time threshold and is after the first time threshold from the last symbol of the first PDCCH is sent. That is, when the second time interval between the DCI and the second HARQ ACK corresponding to the DCI is less than the sixth time threshold, that is, the second condition is not met, then the first beam determined by the first TCI state is used for communication transmission after the first time threshold from the last symbol of the first PDCCH is received.

[0217] In some embodiments, the DCI-scheduled channels may include, but are not limited to, at least one of the following: PDSCH, PUSCH, PUCCH. The DCI-scheduled signals may include, but are not limited to, at least one of the following: CSI-RS, SRS.

[0218] In some embodiments, the communication performed using the first beam may be all communications between the terminal and the network device, or may be part of the communications between the terminal and the network device, for example, part of a specific communication.

[0219] In some embodiments, the time threshold is determined based on at least one of the following methods: based on fifth information sent by the network device, the fifth information is used to indicate the time threshold; based on the protocol; based on terminal capability information; the time threshold includes at least one of the following: a first time threshold, a second time threshold, a third time threshold, a fourth time threshold, a fifth time threshold, and a sixth time threshold.

[0220] Optionally, the network device 102 determines a time threshold and sends fifth information indicating the time threshold to the terminal 101. The terminal 101 receives the fifth information sent by the network device and determines the time threshold based on the fifth information.

[0221] Optionally, the terminal 101 and the network device 102 determine the time threshold based on a protocol.

[0222] Optionally, the terminal 101 determines a time threshold and reports the time threshold to the network device based on the terminal capability information, that is, the time threshold is included in the terminal capability information.

[0223] Optionally, if the terminal 101 receives fifth information sent by the network device 102 after determining the time threshold, the time threshold may be determined based on the time threshold indicated by the fifth information.

[0224] In some embodiments, the time thresholds may be the same or different. For example, the second time threshold and the third time threshold may be the same. That is, regardless of whether the fourth information is a MAC CE or a DCI, communication using the second beam begins a period of time after receiving the fourth information. This period of time is both the second time threshold and the third time threshold. It will be appreciated that when the second time threshold and the third time threshold are the same, when the network device indicates various time thresholds to the terminal, only one time threshold needs to be indicated for the fourth information, thereby conserving resources. The second time threshold and the third time threshold may also be different. The second time threshold may be greater than the third time threshold, or less than the third time threshold. That is, due to the different characteristics of a MAC CE and a DCI, the time interval between receiving a MAC CE and transmitting communication using the second beam indicated by the MAC CE may be greater than the time interval between receiving a DCI and transmitting communication using the second beam indicated by the DCI; or the time interval between receiving a MAC CE and transmitting communication using the second beam indicated by the DCI may be less than the time interval between receiving a DCI and transmitting communication using the second beam indicated by the DCI. It is understandable that when the second time threshold and the third time threshold are different, different situations in which the fourth information is a MAC CE and the fourth information is a DCI can be flexibly addressed. Of course, this disclosure uses the second time threshold and the third time threshold as examples, and although not exhaustive, other time thresholds can be the same or different to achieve corresponding effects, and this disclosure does not impose any limitations.

[0225] In some embodiments, the name of the fourth information is not limited, and it can be, for example, "indication information" or "beam indication signaling".

[0226] In some embodiments, the name of the fifth information is not limited, and it can be, for example, "instruction information" or "configuration information".

[0227] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0228] In some embodiments, "obtain", "get", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0229] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", etc. can be used interchangeably.

[0230] The communication method involved in the embodiment of the present disclosure may include at least one of steps S2101 to S2105. For example, step S2103 may be implemented as an independent embodiment, and step S2103 and step S2105 may be implemented as independent embodiments, but are not limited thereto.

[0231] In some embodiments, step S2101, step S2102, step S2104, and step S2105 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0232] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 2 a .

[0233] FIG2b is a schematic diagram illustrating an interaction of a communication method according to an embodiment of the present disclosure. As shown in FIG2b , the present disclosure embodiment relates to a communication method for use in a communication system 100, the method comprising:

[0234] Step S2201: The network device 102 sends second information to the terminal 101.

[0235] The optional implementation of step S2201 can refer to the optional implementation of step S2101 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0236] In step S2202, the terminal 101 determines a first random access resource corresponding to a reference signal corresponding to a first TCI state based on a first corresponding relationship.

[0237] The optional implementation of step S2202 can refer to the optional implementation of step S2102 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0238] Step S2203 , the terminal 101 sends first information to the network device 102 .

[0239] The optional implementation of step S2203 can refer to the optional implementation of step S2103 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0240] Step S2204 : The network device 102 sends a first PDCCH to the terminal 101 .

[0241] The optional implementation of step S2204 can refer to the optional implementation of step S2104 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0242] Step S2205: The terminal and the network device communicate using the second beam.

[0243] In some embodiments, if the fourth information is received within the first time threshold, that is, the first condition is not met, the terminal and the network device may communicate using a second beam, where the second beam is a beam determined by a second TCI state indicated by the fourth information.

[0244] In some embodiments, after receiving the fourth information, the terminal may, in response to satisfying the second condition, use the second beam determined by the second TCI state for communication transmission.

[0245] In some embodiments, the fourth information includes at least one of the following: MAC CE, DCI.

[0246] In some embodiments, the second condition includes at least one of the following: the fourth information is MAC CE, after the second time threshold from the receipt of MAC CE; the fourth information is downlink control information DCI, after the third time threshold from the receipt of DCI; the fourth information is DCI, after the fourth time threshold from the terminal sending the first hybrid automatic repeat request confirmation HARQ ACK corresponding to the DCI.

[0247] The optional implementation of step S2205 can refer to the optional implementation of step S2105 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0248] Figure 2c is a schematic diagram illustrating an interaction of a communication method according to an embodiment of the present disclosure. As shown in Figure 2c, the present disclosure embodiment relates to a communication method for use in a communication system 100, the method comprising:

[0249] Step S2301 , the network device 102 sends third information to the terminal 101 .

[0250] In some embodiments, the terminal 101 receives third information sent by the network device 102 .

[0251] In some embodiments, the third information is used to determine a second correspondence, where the second correspondence indicates a correspondence between a scheduling request (SR) and a reference signal. The terminal may determine a first SR resource of a reference signal corresponding to the first TCI state based on the second correspondence indicated by the third information. When the reference signal resource corresponding to the QCL Type D indicated by the first TCI state is a resource corresponding to an SSB, the first random access resource is an SR resource corresponding to the SSB. When the reference signal resource corresponding to the QCL Type D indicated by the first TCI state is a resource corresponding to a channel state signal reference signal CSI-RS, the first random access resource is an SR resource corresponding to the SSB corresponding to the CSI-RS or the first random access resource is an SR resource corresponding to the CSI-RS.

[0252] In some embodiments, reference signals and reference signal resources can be interchanged. For example, SSBs can be interchanged with SSB resources, and CSI-RSs can be interchanged with CSI-RS resources.

[0253] In step S2302, the terminal 101 determines a first SR resource corresponding to a reference signal corresponding to the first TCI state based on the second corresponding relationship.

[0254] In some embodiments, the terminal may determine a first TCI state, for example, the first TCI state may be determined based on a beam measurement result of the terminal. The terminal determines, based on the second correspondence, a first SR resource of a reference signal corresponding to the first TCI state.

[0255] In some embodiments, the terminal may send first information based on the determined first SR resource. The first information may be an SR. The first information is used to determine a first TCI state. That is, the network device receives the first information and may determine the first TCI state based on the first information. The first TCI state is used to determine a first beam used for communication between the terminal and the network device. That is, the network device may determine the first beam used for communication between the terminal and the network device based on the first TCI state.

[0256] In some embodiments, the SR resource includes at least one of the following: time-frequency resources, and sequences.

[0257] In some embodiments, the second corresponding relationship may be that one SR resource corresponds to one reference signal, or multiple SR resources correspond to one reference signal, or one SR resource corresponds to multiple reference signals.

[0258] Step S2303 , the terminal 101 sends first information to the network device 102 .

[0259] The optional implementation of step S2303 can refer to the optional implementation of step S2103 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0260] In some embodiments, the first information may be an SR. That is, the terminal sends an SR based on a first SR resource. When the network device receives the SR, it determines a corresponding reference signal based on the first SR resource, determines that the reference signal corresponds to a first TCI state, and determines the first beam based on the first TCI state.

[0261] Step S2304 : The network device 102 sends a first PDCCH to the terminal 101 .

[0262] The optional implementation of step S2304 can refer to the optional implementation of step S2104 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0263] In some embodiments, the first condition includes at least one of the following: after a first time threshold starting from the receipt of the last symbol of the first physical downlink control channel PDCCH, the first PDCCH is sent by the network device based on the first beam determined by the first TCI state; after a first time threshold starting from the terminal sending a resource scheduling request SR; after a first time threshold starting from the receipt of the last symbol of the first PDCCH, and no fourth information is received within the first time threshold, the fourth information is used to indicate a second TCI state, and the second TCI state is used to determine the second beam used by the terminal to communicate with the network device.

[0264] In some embodiments, the first information is SR, and the first PDCCH may be any PDCCH.

[0265] Step S2305: The terminal and the network device communicate using the first beam.

[0266] The optional implementation of step S2305 can refer to the optional implementation of step S2105 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0267] FIG2d is a schematic diagram illustrating an interaction of a communication method according to an embodiment of the present disclosure. As shown in FIG2d , the present disclosure embodiment relates to a communication method for use in a communication system 100, the method comprising:

[0268] Step S2401 , the network device 102 sends third information to the terminal 101 .

[0269] The optional implementation of step S2401 can refer to the optional implementation of step S2301 in Figure 2c and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0270] In step S2402, the terminal 101 determines a first SR resource corresponding to a reference signal corresponding to the first TCI state based on the second corresponding relationship.

[0271] The optional implementation of step S2402 can refer to the optional implementation of step S2302 in Figure 2c and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0272] Step S2403 , the terminal 101 sends first information to the network device 102 .

[0273] The optional implementation of step S2403 can refer to the optional implementation of step S2303 in Figure 2c and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0274] Step S2404 : The network device 102 sends a first PDCCH to the terminal 101 .

[0275] The optional implementation of step S2404 can refer to the optional implementation of step S2304 in Figure 2c and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0276] Step S2405: The terminal and the network device communicate using the second beam.

[0277] The optional implementation of step S2405 can refer to the optional implementation of step S2205 in Figure 2b and other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0278] FIG3a is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3a, the embodiment of the present disclosure relates to a communication method, which is executed by terminal 101 and includes:

[0279] Step S3101, obtain second information.

[0280] The optional implementation of step S3101 can refer to the optional implementation of step S2101 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0281] In some embodiments, the terminal 101 receives the second information sent by the network device 102, but is not limited thereto and may also receive the second information sent by other entities.

[0282] In some embodiments, terminal 101 obtains second information specified by the protocol.

[0283] In some embodiments, terminal 101 obtains the second information from upper layer(s).

[0284] In some embodiments, terminal 101 performs processing to obtain the second information.

[0285] In some embodiments, step S3101 is omitted, and the terminal 101 autonomously implements the function indicated by the second information, or the above function is default or acquiescent.

[0286] Step S3102: Determine a first random access resource corresponding to a reference signal corresponding to a first TCI state based on a first corresponding relationship.

[0287] The optional implementation of step S3102 can refer to the optional implementation of step S2102 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0288] In some embodiments, the first random access resource of the reference signal corresponding to the first TCI state is determined based on the first corresponding relationship.

[0289] Step S3103, sending the first information.

[0290] The optional implementation of step S3103 can refer to the optional implementation of step S2103 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0291] In some embodiments, the terminal 101 sends the first information to the network device 102, but is not limited thereto and the first information may also be sent to other entities.

[0292] Step S3104: Acquire the first PDCCH.

[0293] The optional implementation of step S3104 can refer to the optional implementation of step S2104 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0294] In some embodiments, the terminal 101 receives the first PDCCH sent by the network device 102, but is not limited thereto. The terminal 101 may also receive the first PDCCH sent by other entities.

[0295] In some embodiments, terminal 101 acquires a first PDCCH specified by a protocol.

[0296] In some embodiments, terminal 101 obtains the first PDCCH from upper layer(s).

[0297] In some embodiments, terminal 101 performs processing to obtain the first PDCCH.

[0298] In some embodiments, step S3104 is omitted, and the terminal 101 autonomously implements the function indicated by the first PDCCH, or the above function is default or acquiescent.

[0299] Step S3105: Use the first beam to communicate.

[0300] The optional implementation of step S3105 can refer to the optional implementation of step S2105 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0301] In some embodiments, the terminal 101 communicates with the network device 102 using the first beam, but is not limited thereto and may also communicate with other entities using the first beam.

[0302] FIG3b is a schematic diagram illustrating an interaction of a communication method according to an embodiment of the present disclosure. As shown in FIG3b , the present disclosure embodiment relates to a communication method for use in a communication system 100, the method comprising:

[0303] Step S3201, obtain second information.

[0304] The optional implementation of step S3201 can refer to the optional implementation of step S2201 in Figure 2b and other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0305] In some embodiments, the terminal 101 receives the second information sent by the network device 102, but is not limited thereto and may also receive the second information sent by other entities.

[0306] In some embodiments, terminal 101 obtains second information specified by the protocol.

[0307] In some embodiments, terminal 101 obtains the second information from upper layer(s).

[0308] In some embodiments, terminal 101 performs processing to obtain the second information.

[0309] In some embodiments, step S3201 is omitted, and the terminal 101 autonomously implements the function indicated by the second information, or the above function is default or by default.

[0310] Step S3202: Determine a first random access resource corresponding to a reference signal corresponding to a first TCI state based on a first corresponding relationship.

[0311] The optional implementation of step S3202 can refer to the optional implementation of step S2202 in Figure 2b and other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0312] In some embodiments, the first random access resource of the reference signal corresponding to the first TCI state is determined based on the first corresponding relationship.

[0313] Step S3203, sending the first information.

[0314] The optional implementation of step S3203 can refer to the optional implementation of step S2203 in Figure 2b and other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0315] In some embodiments, the terminal 101 sends the first information to the network device 102, but is not limited thereto and the first information may also be sent to other entities.

[0316] Step S3204: Acquire the first PDCCH.

[0317] The optional implementation of step S3204 can refer to the optional implementation of step S2204 in Figure 2b and other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0318] In some embodiments, the terminal 101 receives the first PDCCH sent by the network device 102, but is not limited thereto. The terminal 101 may also receive the first PDCCH sent by other entities.

[0319] In some embodiments, terminal 101 acquires a first PDCCH specified by a protocol.

[0320] In some embodiments, terminal 101 obtains the first PDCCH from upper layer(s).

[0321] In some embodiments, terminal 101 performs processing to obtain the first PDCCH.

[0322] In some embodiments, step S3204 is omitted, and the terminal 101 autonomously implements the function indicated by the first PDCCH, or the above function is default or by default.

[0323] Step S3205: Use the second beam to communicate.

[0324] The optional implementation of step S3205 can refer to the optional implementation of step S2205 in Figure 2b and other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0325] In some embodiments, the terminal 101 uses the second beam to communicate with the network device 102, but is not limited thereto and can also use the second beam to communicate with other entities.

[0326] FIG3c is a schematic diagram illustrating an interaction of a communication method according to an embodiment of the present disclosure. As shown in FIG3c , the present disclosure embodiment relates to a communication method for use in a communication system 100, the method comprising:

[0327] Step S3301, obtain third information.

[0328] The optional implementation of step S3301 can refer to the optional implementation of step S2301 in Figure 2c and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0329] In some embodiments, the terminal 101 receives the third information sent by the network device 102, but is not limited thereto and may also receive the third information sent by other entities.

[0330] In some embodiments, terminal 101 obtains third information specified by the protocol.

[0331] In some embodiments, terminal 101 obtains the third information from upper layer(s).

[0332] In some embodiments, terminal 101 performs processing to obtain the third information.

[0333] In some embodiments, step S3301 is omitted, and the terminal 101 autonomously implements the function indicated by the third information, or the above function is default or by default.

[0334] Step S3302: Determine a first SR resource corresponding to a reference signal corresponding to the first TCI state based on the second corresponding relationship.

[0335] The optional implementation of step S3302 can refer to the optional implementation of step S2302 in Figure 2c and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0336] In some embodiments, the first SR resource of the reference signal corresponding to the first TCI state is determined based on the second corresponding relationship.

[0337] Step S3303, sending the first information.

[0338] The optional implementation of step S3303 can refer to the optional implementation of step S2303 in Figure 2c and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0339] In some embodiments, the terminal 101 sends the first information to the network device 102, but is not limited thereto and the first information may also be sent to other entities.

[0340] Step S3304: Acquire the first PDCCH.

[0341] The optional implementation of step S3304 can refer to the optional implementation of step S2304 in Figure 2c and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0342] In some embodiments, the terminal 101 receives the first PDCCH sent by the network device 102, but is not limited thereto. The terminal 101 may also receive the first PDCCH sent by other entities.

[0343] In some embodiments, terminal 101 acquires a first PDCCH specified by a protocol.

[0344] In some embodiments, terminal 101 obtains the first PDCCH from upper layer(s).

[0345] In some embodiments, terminal 101 performs processing to obtain the first PDCCH.

[0346] In some embodiments, step S3304 is omitted, and the terminal 101 autonomously implements the function indicated by the first PDCCH, or the above function is default or by default.

[0347] Step S3305: Use the first beam to communicate.

[0348] The optional implementation of step S3305 can refer to the optional implementation of step S2305 in Figure 2c and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0349] In some embodiments, the terminal 101 communicates with the network device 102 using the first beam, but is not limited thereto and may also communicate with other entities using the first beam.

[0350] FIG3 d is a schematic diagram illustrating an interaction of a communication method according to an embodiment of the present disclosure. As shown in FIG3 d , the present disclosure embodiment relates to a communication method for use in a communication system 100, the method comprising:

[0351] Step S3401, obtain third information.

[0352] The optional implementation of step S3401 can refer to the optional implementation of step S2401 in Figure 2d and other related parts in the embodiment involved in Figure 2d, which will not be repeated here.

[0353] In some embodiments, the terminal 101 receives the third information sent by the network device 102, but is not limited thereto and may also receive the third information sent by other entities.

[0354] In some embodiments, terminal 101 obtains third information specified by the protocol.

[0355] In some embodiments, terminal 101 obtains the third information from upper layer(s).

[0356] In some embodiments, terminal 101 performs processing to obtain the third information.

[0357] In some embodiments, step S3401 is omitted, and the terminal 101 autonomously implements the function indicated by the third information, or the above function is default or by default.

[0358] Step S3402: Determine a first SR resource corresponding to a reference signal corresponding to the first TCI state based on the second corresponding relationship.

[0359] The optional implementation of step S3402 can refer to the optional implementation of step S2402 in Figure 2d and other related parts in the embodiment involved in Figure 2d, which will not be repeated here.

[0360] In some embodiments, the first random access resource of the reference signal corresponding to the first TCI state is determined based on the first corresponding relationship.

[0361] Step S3403, sending the first information.

[0362] The optional implementation of step S3403 can refer to the optional implementation of step S2403 in Figure 2d and other related parts in the embodiment involved in Figure 2d, which will not be repeated here.

[0363] In some embodiments, the terminal 101 sends the first information to the network device 102, but is not limited thereto and the first information may also be sent to other entities.

[0364] Step S3404: Acquire the first PDCCH.

[0365] The optional implementation of step S3404 can refer to the optional implementation of step S2404 in Figure 2d and other related parts in the embodiment involved in Figure 2d, which will not be repeated here.

[0366] In some embodiments, the terminal 101 receives the first PDCCH sent by the network device 102, but is not limited thereto. The terminal 101 may also receive the first PDCCH sent by other entities.

[0367] In some embodiments, terminal 101 acquires a first PDCCH specified by a protocol.

[0368] In some embodiments, terminal 101 obtains the first PDCCH from upper layer(s).

[0369] In some embodiments, terminal 101 performs processing to obtain the first PDCCH.

[0370] In some embodiments, step S3404 is omitted, and the terminal 101 autonomously implements the function indicated by the first PDCCH, or the above function is default or acquiescent.

[0371] Step S3405: ​​Use the second beam to communicate.

[0372] The optional implementation of step S3405 can refer to the optional implementation of step S2405 in Figure 2d and other related parts in the embodiment involved in Figure 2d, which will not be repeated here.

[0373] In some embodiments, the terminal 101 uses the second beam to communicate with the network device 102, but is not limited thereto and can also use the second beam to communicate with other entities.

[0374] FIG3e is a schematic diagram illustrating an interaction of a communication method according to an embodiment of the present disclosure. As shown in FIG3e , the present disclosure embodiment relates to a communication method for use in a communication system 100, the method comprising:

[0375] Step S3501, sending the first information.

[0376] The optional implementation of step S3501 can refer to the optional implementation of step S2103 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0377] In some embodiments, the terminal 101 sends the first information to the network device 102, but is not limited thereto and the first information may also be sent to other entities.

[0378] In some embodiments, the method further includes: in response to satisfying a first condition, using a first beam determined by a first TCI state for communication transmission.

[0379] In some embodiments, the first information includes at least one of the following: a random access message and a scheduling request SR.

[0380] In some embodiments, the first information includes a random access message, the first information is sent based on a first random access resource, the first random access resource is a random access resource corresponding to a reference signal corresponding to the first TCI state, and there is a first correspondence between the random access resource and the reference signal.

[0381] In some embodiments, the method further includes: receiving second information, where the second information is used to determine the first corresponding relationship.

[0382] In some embodiments, the random access resource includes at least one of the following: a random access time domain resource, a random access frequency domain resource, or a random access preamble.

[0383] In some embodiments, the first information includes an SR, the first information is sent based on a first SR resource, the first SR resource is an SR resource corresponding to a reference signal corresponding to the first TCI state, and a second corresponding relationship exists between the SR resource and the reference signal.

[0384] In some embodiments, the method further includes: receiving third information, where the third information is used to determine the second corresponding relationship.

[0385] In some embodiments, the first condition includes at least one of the following: after a first time threshold from the receipt of the last symbol of a first physical downlink control channel (PDCCH), the first PDCCH is sent by the network device using the first beam determined based on the first TCI state; after a first time threshold from the transmission of a resource scheduling request (SR) by the terminal; after a first time threshold from the receipt of the last symbol of the first PDCCH, and no second information is received within the first time threshold, the second information being used to indicate a second TCI state, and the second TCI state being used to determine a second beam used by the terminal for communication with the network device.

[0386] In some embodiments, the first information includes a random access message, the random access process corresponding to the random access message is a non-contention-based random access, and the search space corresponding to the first PDCCH is a search space for TCI state update.

[0387] In some embodiments, the first information includes a random access message, the random access process corresponding to the random access message is contention-based random access, and the first PDCCH is a PDCCH used to determine completion of contention-based random access.

[0388] In some embodiments, the method further includes: in response to receiving fourth information within a first time threshold from the last symbol of the first PDCCH, determining a second TCI state based on the fourth information. The fourth information is used to indicate the second TCI state, and the second TCI state is used to determine a second beam used by the terminal to communicate with the network device.

[0389] In some embodiments, the method further includes: in response to satisfying a second condition, using a second beam determined by a second TCI state for communication transmission.

[0390] In some embodiments, the second condition includes at least one of the following: the fourth information is a media access control element (MAC CE), and the second time threshold has passed since the MAC CE was received. The fourth information is downlink control information (DCI), and the third time threshold has passed since the DCI was received. The fourth information is DCI, and the fourth time threshold has passed since the terminal sent a first hybrid automatic repeat request acknowledgment (HARQ ACK) corresponding to the DCI.

[0391] In some embodiments, the fourth information is DCI, and the DCI is used to schedule a channel or signal, which is communicated using the second beam. The second condition includes at least one of the following: a first time interval is greater than or equal to a fifth time threshold, where the first time interval is the time interval between the DCI and the channel or signal scheduled by the DCI. A second time interval is greater than or equal to a sixth time threshold, where the second time interval is the time interval between the DCI and a second HARQ ACK corresponding to the DCI.

[0392] In some embodiments, the fourth information is DCI, and the DCI is used to schedule a channel or signal, the channel or signal uses the first beam for communication, and the first condition includes at least one of the following: the first time interval is less than the fifth time threshold, and after the first time threshold starting from the last symbol of the first PDCCH, the first time interval is the time interval between the DCI and the channel or signal scheduled by the DCI; the second time interval is less than the sixth time threshold, and after the first time threshold starting from the last symbol of the first PDCCH, the second time interval is the time interval between the DCI and the second HARQ ACK corresponding to the DCI.

[0393] In some embodiments, the time threshold is determined based on at least one of the following: based on fifth information sent by the network device, the fifth information being used to indicate the time threshold; based on a protocol; based on terminal capability information; and the time threshold includes at least one of the following: a first time threshold, a second time threshold, a third time threshold, a fourth time threshold, a fifth time threshold, and a sixth time threshold.

[0394] In some embodiments, the communication transmission includes all communication transmission between the terminal and the network device, or part of the communication transmission between the terminal and the network device.

[0395] In some embodiments, sending the first information includes: sending the first information in response to satisfying a third condition.

[0396] In some embodiments, the third condition includes at least one of the following: the measurement result of the current beam is lower than the first threshold value, and the current beam includes at least one of the following: the best beam in the beam measurement report last reported by the terminal, the beam last indicated by the network device, all beams in the beam measurement report last reported by the terminal, and the worst beam in the beam measurement report last reported by the terminal. The measurement result of the candidate beam is higher than the second threshold value, and the candidate beam includes at least one of the following: a non-optimal beam in the beam measurement report last reported by the terminal, a beam other than the beam in the beam measurement report last reported by the terminal, and a beam other than the beam last indicated by the network device. The measurement result of the candidate beam is higher than the measurement result of the current beam, and the difference between the measurement result of the candidate beam and the measurement result of the current beam is greater than the third threshold value. The best K beams in the beam measurement report currently reported by the terminal are different from at least one of the best K beams in the beam measurement report last reported by the terminal, and K is a positive integer. The best K beams in the beam measurement report currently reported by the terminal do not include the best beam in the beam measurement report most recently reported by the terminal. The best K beams in the beam measurement report currently reported by the terminal do not include the beam most recently indicated by the network device. The difference in measurement results of at least two of the best K beams in the beam measurement report currently reported by the terminal and the best K beams in the beam measurement report most recently reported by the terminal is greater than a third threshold value. The difference in measurement results of at least two of the worst K beams in the beam measurement report currently reported by the terminal and the worst K beams in the beam measurement report most recently reported by the terminal is greater than a third threshold value.

[0397] FIG4a is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4a , the present disclosure embodiment relates to a communication method, which is executed by a network device 102 and includes:

[0398] Step S4101, sending the second information.

[0399] The optional implementation of step S4101 can refer to the optional implementation of step S2101 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0400] In some embodiments, the network device 102 sends the second information to the terminal 101, but is not limited thereto and may also send the second information to other entities.

[0401] Step S4102, obtaining first information.

[0402] The optional implementation of step S4102 can refer to the optional implementation of step S2103 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0403] In some embodiments, the network device 102 receives the first information sent by the terminal 101, but is not limited thereto and may also receive the first information sent by other entities.

[0404] In some embodiments, the network device 102 obtains first information specified by the protocol.

[0405] In some embodiments, the network device 102 obtains the first information from an upper layer(s).

[0406] In some embodiments, the network device 102 performs processing to obtain the first information.

[0407] In some embodiments, step S4102 is omitted, and the network device 102 autonomously implements the function indicated by the first information, or the above function is default or by default.

[0408] Step S4103: Send the first PDCCH.

[0409] The optional implementation of step S4103 can refer to the optional implementation of step S2104 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0410] In some embodiments, the network device 102 sends the first PDCCH to the terminal 101, but is not limited thereto and may also send the first PDCCH to other entities.

[0411] Step S4104: Use the first beam to communicate.

[0412] The optional implementation of step S4104 can refer to the optional implementation of step S2105 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0413] In some embodiments, the network device 102 communicates with the terminal 101 using the first beam, but is not limited thereto and may also communicate with other entities using the first beam.

[0414] FIG4b is a schematic diagram illustrating an interaction of a communication method according to an embodiment of the present disclosure. As shown in FIG4b , the present disclosure embodiment relates to a communication method for use in a communication system 100, the method comprising:

[0415] Step S4201, sending the second information.

[0416] The optional implementation of step S4201 can refer to the optional implementation of step S2201 in Figure 2b and other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0417] In some embodiments, the network device 102 sends the second information to the terminal 101, but is not limited thereto and may also send the second information to other entities.

[0418] Step S4202, obtain first information.

[0419] The optional implementation of step S4202 can refer to the optional implementation of step S2203 in Figure 2b and other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0420] In some embodiments, the network device 102 receives the first information sent by the terminal 101, but is not limited thereto and may also receive the first information sent by other entities.

[0421] In some embodiments, the network device 102 obtains first information specified by the protocol.

[0422] In some embodiments, the network device 102 obtains the first information from an upper layer(s).

[0423] In some embodiments, the network device 102 performs processing to obtain the first information.

[0424] In some embodiments, step S4202 is omitted, and the network device 102 autonomously implements the function indicated by the first information, or the above function is default or by default.

[0425] Step S4203: Send the first PDCCH.

[0426] The optional implementation of step S4203 can refer to the optional implementation of step S2204 in Figure 2b and other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0427] In some embodiments, the network device 102 sends the first PDCCH to the terminal 101, but is not limited thereto and may also send the first PDCCH to other entities.

[0428] Step S4204: Use the second beam to communicate.

[0429] The optional implementation of step S4204 can refer to the optional implementation of step S2205 in Figure 2b and other related parts in the embodiment involved in Figure 2b, which will not be repeated here.

[0430] In some embodiments, the network device 102 uses the second beam to communicate with the terminal 101, but is not limited thereto and can also use the second beam to communicate with other entities.

[0431] FIG4c is a schematic diagram illustrating an interaction of a communication method according to an embodiment of the present disclosure. As shown in FIG4c , the present disclosure embodiment relates to a communication method for use in a communication system 100, the method comprising:

[0432] Step S4301, sending the third information.

[0433] The optional implementation of step S4301 can refer to the optional implementation of step S2301 in Figure 2c and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0434] In some embodiments, the network device 102 sends the third information to the terminal 101, but is not limited thereto and may also send the third information to other entities.

[0435] Step S4302, obtain first information.

[0436] The optional implementation of step S4302 can refer to the optional implementation of step S2303 in Figure 2c and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0437] In some embodiments, the network device 102 receives the first information sent by the terminal 101, but is not limited thereto and may also receive the first information sent by other entities.

[0438] In some embodiments, the network device 102 obtains first information specified by the protocol.

[0439] In some embodiments, the network device 102 obtains the first information from an upper layer(s).

[0440] In some embodiments, the network device 102 performs processing to obtain the first information.

[0441] In some embodiments, step S4302 is omitted, and the network device 102 autonomously implements the function indicated by the first information, or the above function is default or by default.

[0442] Step S4303: Send the first PDCCH.

[0443] The optional implementation of step S4303 can refer to the optional implementation of step S2304 in Figure 2c and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0444] In some embodiments, the network device 102 sends the first PDCCH to the terminal 101, but is not limited thereto and may also send the first PDCCH to other entities.

[0445] Step S4304: Use the first beam to communicate.

[0446] The optional implementation of step S4304 can refer to the optional implementation of step S2305 in Figure 2c and other related parts in the embodiment involved in Figure 2c, which will not be repeated here.

[0447] In some embodiments, the network device 102 communicates with the terminal 101 using the first beam, but is not limited thereto and may also communicate with other entities using the first beam.

[0448] Figure 4d is a schematic diagram of an interaction method of a communication method according to an embodiment of the present disclosure. As shown in Figure 4d, the embodiment of the present disclosure relates to a communication method for use in a communication system 100, the method comprising:

[0449] Step S4401, sending the third information.

[0450] The optional implementation of step S4401 can refer to the optional implementation of step S2401 in Figure 2d and other related parts in the embodiment involved in Figure 2d, which will not be repeated here.

[0451] In some embodiments, the network device 102 sends the third information to the terminal 101, but is not limited thereto and may also send the third information to other entities.

[0452] Step S4402, obtain first information.

[0453] The optional implementation of step S4402 can refer to the optional implementation of step S2403 in Figure 2d and other related parts in the embodiment involved in Figure 2d, which will not be repeated here.

[0454] In some embodiments, the network device 102 receives the first information sent by the terminal 101, but is not limited thereto and may also receive the first information sent by other entities.

[0455] In some embodiments, the network device 102 obtains first information specified by the protocol.

[0456] In some embodiments, the network device 102 obtains the first information from an upper layer(s).

[0457] In some embodiments, the network device 102 performs processing to obtain the first information.

[0458] In some embodiments, step S4402 is omitted, and the network device 102 autonomously implements the function indicated by the first information, or the above function is default or by default.

[0459] Step S4403: Send the first PDCCH.

[0460] The optional implementation of step S4403 can refer to the optional implementation of step S2404 in Figure 2d and other related parts in the embodiment involved in Figure 2d, which will not be repeated here.

[0461] In some embodiments, the network device 102 sends the first PDCCH to the terminal 101, but is not limited thereto and may also send the first PDCCH to other entities.

[0462] Step S4404: Use the second beam to communicate.

[0463] The optional implementation of step S4404 can refer to the optional implementation of step S2405 in Figure 2d and other related parts in the embodiment involved in Figure 2d, which will not be repeated here.

[0464] In some embodiments, the network device 102 uses the second beam to communicate with the terminal 101, but is not limited thereto and can also use the second beam to communicate with other entities.

[0465] Figure 4e is a schematic diagram illustrating an interaction of a communication method according to an embodiment of the present disclosure. As shown in Figure 4e, the present disclosure embodiment relates to a communication method for use in a communication system 100, the method comprising:

[0466] Step S4501, obtain first information.

[0467] The optional implementation of step S4501 can refer to the optional implementation of step S2103 in Figure 2a and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

[0468] In some embodiments, the network device 102 receives the first information sent by the terminal 101, but is not limited thereto and may also receive the first information sent by other entities.

[0469] In some embodiments, the network device 102 obtains first information specified by the protocol.

[0470] In some embodiments, the network device 102 obtains the first information from an upper layer(s).

[0471] In some embodiments, the network device 102 performs processing to obtain the first information.

[0472] In some embodiments, step S4501 is omitted, and the network device 102 autonomously implements the function indicated by the first information, or the above function is default or by default.

[0473] FIG5 is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG5 , the embodiment of the present disclosure relates to a communication method, and the method includes:

[0474] Step S5101: Terminal 101 sends first information to network device 102.

[0475] The optional implementation of step S5101 can be found in S2103 of FIG. 2a and other related parts of the embodiment involved in FIG. 2a , and will not be described in detail here.

[0476] In some embodiments, the above method may include the method of the above embodiments related to the communication system 100, the terminal 101, the network device 102, etc., which will not be repeated here.

[0477] Step S5102: The network device 102 receives first information.

[0478] Optional implementations of step S5102 may be found in S2103 of FIG. 2a and other related parts of the embodiment involved in FIG. 2a , and will not be described in detail here.

[0479] In some embodiments, the above method may include the method of the above embodiments related to the communication system 100, the terminal 101, the network device 102, etc., which will not be repeated here.

[0480] The present disclosure also provides a communication method as follows:

[0481] In some embodiments, the terminal sends first information used to determine a new beam (beam, spatial Rx parameter, QCL (quasi-co location) Type D, spatial setting, spatial reception filter, spatial transmission filter). When certain conditions are met, the terminal begins using the new beam to communicate with the network device.

[0482] In some embodiments, the new beam may be the first beam.

[0483] In some embodiments, the first information includes Msg 1 or Msg A in a random process, wherein Msg A includes Msg 1 and PUSCH.

[0484] In some embodiments, the base station configures the correspondence between the CSI-RS or SSB and the random access resources. The random access resources include the random access occasion (RACH occasion, RO), the preamble, etc. The RO includes time domain and frequency domain resources. After determining the CSI-RS or SSB corresponding to the new beam, the terminal sends a random access preamble based on the random access resources corresponding to the CSI-RS or SSB. The preamble is included in MSg 1 or Msg A. The base station determines the CSI-RS or SSB corresponding to the new beam based on the received preamble and the corresponding RO, and then sends the PDCCH based on the new beam. After the first time of the last symbol of the PDCCH, the base station and the terminal start using the new beam uniformly, that is, certain conditions.

[0485] In some embodiments, non-contention-free random access can be used, meaning that the preamble and RO are dedicated. The first time is calculated starting from the last symbol of the PDCCH sent by the base station on a designated SS. The designated SS can be dedicated to SS feedback for beam updates.

[0486] In some embodiments, it may be contention based, that is, the preamble and RO may collide with other UEs, so the first time is to start counting from the last symbol of the PDCCH that determines the completion of the contention based random access.

[0487] In some embodiments, the sending of Msg1 or Msg A is triggered by an event.

[0488] In some embodiments, event may be a third condition.

[0489] In some embodiments, the first information includes a SR.

[0490] In some embodiments, the base station configures SR resources, such as time-frequency resources and sequences, and the corresponding relationship with CSI-RS or SSB. The correspondence can be one-to-many or one-to-one. The SR resources include, for example, time-frequency resources and sequences. After determining the CSI-RS or SSB corresponding to the new beam, the terminal sends an SR based on the SR resources corresponding to the CSI-RS or SSB. The base station determines the CSI-RS or SSB corresponding to the new beam based on the received SR, and then sends a PDCCH based on the new beam. The base station and the terminal uniformly start using the new beam after the first time of the last symbol of the PDCCH, that is, a certain condition. Alternatively, the base station and the terminal uniformly start using the new beam after the first time after the SR is sent, that is, a certain condition.

[0491] In some embodiments, SR sending is based on event triggering.

[0492] In some embodiments, the definition of a condition in a certain condition is satisfied: a time threshold is defined, which is referred to as a first time threshold for the sake of description.

[0493] In some embodiments, a new beam is used after the time exceeds the first time threshold.

[0494] In some embodiments, the starting position of the time threshold is as described above. That is, in this case, only this time threshold is used for judgment. When it is greater than or equal to the first time threshold, the terminal adopts the determined new beam.

[0495] In some embodiments, or if no beam indication signaling that can be used to indicate a new beam is received within a first time threshold, the new beam is used after the time is greater than the first time threshold; if a beam indication signaling MAC CE or DCI that can be used to indicate a new beam is received within the first time threshold, the new beam is updated according to the new beam usage time rule in the MAC CE or DCI.

[0496] In some embodiments, only the time threshold is considered. However, if the base station finds that the beam corresponding to the random access or SR of the terminal is not suitable as a new beam (for example, the beam is scheduled to another terminal), the base station may need to use beam indication signaling to replace the new beam determined based on the random access or SR. Therefore, b) provides that when a beam indication signaling that can be used to indicate a new beam is received within the time threshold, the timing of the first time threshold is terminated. That is, after the first time threshold expires, the new beam determined based on the random access or SR is not used. Instead, the beam is updated to the new beam indicated in the MAC CE or DCI using a time rule based on the new beam indicated in the MAC CE or DCI.

[0497] In some embodiments, the new beam indicated in the MAC CE or DCI may be the second beam.

[0498] In some embodiments, "beam indication signaling that can be used to indicate a new beam" is because it takes time for the terminal to decode the MAC CE or DCI and determine that it contains an indication of a new beam. Therefore, the time for indicating a new beam using the beam indication information here can be defined in two ways: one is after the MAC CE or DCI is received, and the other is after the MAC CE or DCI is decoded to determine that the new beam indication is included.

[0499] In some embodiments, when the "beam indication signaling that can be used to indicate a new beam" is a MAC CE or DCI used only for beam indication, the time for adopting the new beam is determined according to the time rule of the beam indication in the MAC CE or DCI, as follows:

[0500] In some embodiments, if it is a MAC CE indication, then after a second time threshold after receiving the MAC CE.

[0501] In some embodiments, if it is a DCI indication, it includes two types:

[0502] a) after a third time threshold after receiving the DCI;

[0503] b) After receiving the DCI, the terminal needs to feed back a HARQ ACK for the DCI, after a fourth time threshold after the moment when the terminal sends the HARQ ACK.

[0504] In some embodiments, when the "beam indication signaling that can be used to indicate a new beam" is DCI, and the DCI schedules PDSCH, PUSCH, PUCCH or CSI-RS, SRS, etc.

[0505] a) The first is that if the time interval between the DCI and the PDSCH, PUSCH, PUCCH or CSI-RS, SRS, etc. scheduled by the DCI is greater than the fifth time threshold, then the PDSCH, PUSCH, PUCCH or CSI-RS, SRS, etc. scheduled by the DCI can use the new beam indicated by the DCI; if the time interval between the DCI and the HARQ ACK feedback for the DCI is greater than the fifth time threshold, the HARQ ACK can also use the new beam indicated by the DCI;

[0506] b) or the second is that the new beam can only be used after the sixth time threshold after the HARQ ACK for the DCI is sent;

[0507] c) Or, if a DCI that can be used to indicate a new beam is received within the first time threshold, and the DCI schedules PDSCH, PUSCH, PUCCH or CSI-RS, SRS, etc.

[0508] In some embodiments, the PDSCH, PUSCH, PUCCH or CSI-RS, SRS scheduled by DCI may use a new beam determined based on random access or SR after the first time threshold but before the fifth time threshold or the sixth time threshold mentioned above; for HARQ ACK feedback, if it is after the first time threshold but before the fifth time threshold mentioned above, a new beam determined based on random access or SR may also be used.

[0509] In some embodiments, methods for determining each time threshold include at least one of the following:

[0510] a) Base station indication;

[0511] b) Protocol configuration;

[0512] c) UE reports based on capabilities;

[0513] d) After the UE reports based on its capabilities, the base station gives further instructions.

[0514] In some embodiments, the UE reports based on the capability, and the terminal capability information reported by the UE may include various time thresholds.

[0515] In some embodiments, the new beam may be applicable to all communication transmissions, or certain specific communication transmissions, such as certain specific PDCCHs, while the beams of other communication transmissions still use beam indication signaling.

[0516] In some embodiments, a communication transmission may also be referred to as a communication.

[0517] In some embodiments, the first information is triggered based on an event, and the event includes at least one of the following:

[0518] a) The current beam is below the threshold.

[0519] In some embodiments, the threshold below which the current beam is below may be a first threshold value.

[0520] In some embodiments, the current beam is defined as: the best beam in the last report, or the beam most recently indicated by the base station, or all beams in the last report, or the worst beam in the last report.

[0521] b) The candidate beam is above the threshold.

[0522] In some embodiments, the threshold value above which the candidate beam is higher may be a second threshold value.

[0523] In some embodiments, candidate beams are defined as: non-optimal beams in the last report, beams other than the beams included in the last report, or beams other than the beams most recently indicated by the base station.

[0524] c) The candidate beam is higher than the current beam by an offset.

[0525] In some embodiments, the offset may be a third threshold value.

[0526] In some embodiments, the definitions of the current beam and the candidate beams are the same as above.

[0527] d) At least one of the current best K beams is different from the best K beams in the last report or does not include the best beam reported last time, or the best K beams do not include the beam most recently indicated by the base station.

[0528] In some embodiments, further, the best beam difference in the two sets is above offset.

[0529] In some embodiments, the worst beam difference within the two sets is above offset.

[0530] Figure 6a is a schematic diagram of the structure of a terminal according to an embodiment of the present disclosure. As shown in Figure 6a, terminal 6100 may include a transceiver module 6101. Transceiver module 6101 is configured to transmit first information to a network device. The first information is used to determine a first transmission configuration indication (TCI) state. The first TCI state is used to determine a first beam used by the terminal to communicate with the network device.

[0531] In some embodiments, the terminal 6100 further includes a processing module 6102 for performing communication transmission using a first beam determined by a first TCI state in response to satisfying a first condition.

[0532] In some embodiments, the first information includes at least one of the following: a random access message and a scheduling request SR.

[0533] In some embodiments, the first information includes a random access message, the first information is sent based on a first random access resource, the first random access resource is a random access resource corresponding to a reference signal corresponding to the first TCI state, and there is a first correspondence between the random access resource and the reference signal.

[0534] In some embodiments, the transceiver module 6101 is further used to: receive second information, where the second information is used to determine the first corresponding relationship.

[0535] In some embodiments, the random access resource includes at least one of the following: a random access time domain resource, a random access frequency domain resource, or a random access preamble.

[0536] In some embodiments, the first information includes an SR, the first information is sent based on a first SR resource, the first SR resource is an SR resource corresponding to a reference signal corresponding to the first TCI state, and a second corresponding relationship exists between the SR resource and the reference signal.

[0537] In some embodiments, the transceiver module 6101 is further used to: receive third information, where the third information is used to determine the second corresponding relationship.

[0538] In some embodiments, the first condition includes at least one of the following: after a first time threshold from the receipt of the last symbol of a first physical downlink control channel (PDCCH), the first PDCCH is sent by the network device using the first beam determined based on the first TCI state; after a first time threshold from the transmission of a resource scheduling request (SR) by the terminal; after a first time threshold from the receipt of the last symbol of the first PDCCH, and no second information is received within the first time threshold, the second information being used to indicate a second TCI state, and the second TCI state being used to determine a second beam used by the terminal for communication with the network device.

[0539] In some embodiments, the first information includes a random access message, the random access process corresponding to the random access message is a non-contention-based random access, and the search space corresponding to the first PDCCH is a search space for TCI state update.

[0540] In some embodiments, the first information includes a random access message, the random access process corresponding to the random access message is contention-based random access, and the first PDCCH is a PDCCH used to determine completion of contention-based random access.

[0541] In some embodiments, the method further includes: in response to receiving fourth information within a first time threshold from the last symbol of the first PDCCH, determining a second TCI state based on the fourth information. The fourth information is used to indicate the second TCI state, and the second TCI state is used to determine a second beam used by the terminal to communicate with the network device.

[0542] In some embodiments, the processing module 6102 is further configured to, in response to satisfying a second condition, use a second beam determined by a second TCI state for communication transmission.

[0543] In some embodiments, the second condition includes at least one of the following: the fourth information is a media access control element (MAC CE), and the second time threshold has passed since the MAC CE was received. The fourth information is downlink control information (DCI), and the third time threshold has passed since the DCI was received. The fourth information is DCI, and the fourth time threshold has passed since the terminal sent a first hybrid automatic repeat request acknowledgment (HARQ ACK) corresponding to the DCI.

[0544] In some embodiments, the fourth information is DCI, and the DCI is used to schedule a channel or signal, which is communicated using the second beam. The second condition includes at least one of the following: a first time interval is greater than or equal to a fifth time threshold, where the first time interval is the time interval between the DCI and the channel or signal scheduled by the DCI. A second time interval is greater than or equal to a sixth time threshold, where the second time interval is the time interval between the DCI and a second HARQ ACK corresponding to the DCI.

[0545] In some embodiments, the fourth information is DCI, and the DCI is used to schedule a channel or signal, and the channel or signal uses the first beam for communication. The first condition includes at least one of the following: the first time interval is less than a fifth time threshold, and after the first time threshold from the last symbol of the first PDCCH being transmitted, the first time interval is the time interval between the DCI and the channel or signal scheduled by the DCI; and the second time interval is less than a sixth time threshold, and after the first time threshold from the last symbol of the first PDCCH being transmitted, the second time interval is the time interval between the DCI and a second HARQ ACK corresponding to the DCI.

[0546] In some embodiments, the processing module 6102 determines the time threshold based on at least one of the following: based on fifth information sent by the network device, the fifth information indicating the time threshold; based on a protocol; based on terminal capability information; and the time threshold includes at least one of the following: a first time threshold, a second time threshold, a third time threshold, a fourth time threshold, a fifth time threshold, and a sixth time threshold.

[0547] In some embodiments, the communication transmission includes all communication transmission between the terminal and the network device, or part of the communication transmission between the terminal and the network device.

[0548] In some embodiments, the transceiver module 6101 sends the first information in the following manner: in response to satisfying the third condition, the first information is sent.

[0549] In some embodiments, the third condition includes at least one of the following: the measurement result of the current beam is lower than the first threshold value, and the current beam includes at least one of the following: the best beam in the beam measurement report last reported by the terminal, the beam last indicated by the network device, all beams in the beam measurement report last reported by the terminal, and the worst beam in the beam measurement report last reported by the terminal. The measurement result of the candidate beam is higher than the second threshold value, and the candidate beam includes at least one of the following: a non-optimal beam in the beam measurement report last reported by the terminal, a beam other than the beam in the beam measurement report last reported by the terminal, and a beam other than the beam last indicated by the network device. The measurement result of the candidate beam is higher than the measurement result of the current beam, and the difference between the measurement result of the candidate beam and the measurement result of the current beam is greater than the third threshold value. The best K beams in the beam measurement report currently reported by the terminal are different from at least one of the best K beams in the beam measurement report last reported by the terminal, and K is a positive integer. The best K beams in the beam measurement report currently reported by the terminal do not include the best beam in the beam measurement report most recently reported by the terminal. The best K beams in the beam measurement report currently reported by the terminal do not include the beam most recently indicated by the network device. The difference in measurement results of at least two of the best K beams in the beam measurement report currently reported by the terminal and the best K beams in the beam measurement report most recently reported by the terminal is greater than a third threshold value. The difference in measurement results of at least two of the worst K beams in the beam measurement report currently reported by the terminal and the worst K beams in the beam measurement report most recently reported by the terminal is greater than a third threshold value.

[0550] Figure 6b is a schematic diagram of the structure of a network device according to an embodiment of the present disclosure. As shown in Figure 6b, network device 6200 may include a transceiver module 6201. Transceiver module 6201 is configured to receive first information sent by a terminal, the first information being used to determine a first transmission configuration indication (TCI) state. The first TCI state is used to determine a first beam used by the terminal for communication with the network device.

[0551] In some embodiments, the network device 6200 further includes a processing module 6202 for performing communication transmission using a first beam determined by a first TCI state in response to satisfying a first condition.

[0552] In some embodiments, the first information includes at least one of the following: a random access message and a scheduling request SR.

[0553] In some embodiments, the first information includes a random access message, the first information is sent based on a first random access resource, the first random access resource is a random access resource corresponding to a reference signal corresponding to the first TCI state, and there is a first correspondence between the random access resource and the reference signal.

[0554] In some embodiments, before the network device receives the first information sent by the terminal, the transceiver module 6201 is further used to: send second information, where the second information is used to determine the first corresponding relationship.

[0555] In some embodiments, the random access resource includes at least one of the following: a random access time domain resource, a random access frequency domain resource, or a random access preamble.

[0556] In some embodiments, the first information includes an SR, the first information is sent based on a first SR resource, the first SR resource is an SR resource corresponding to a reference signal corresponding to the first TCI state, and a second corresponding relationship exists between the SR resource and the reference signal.

[0557] In some embodiments, before the network device receives the first information sent by the terminal, the transceiver module 6201 is further used to: send third information, where the third information is used to determine the second corresponding relationship.

[0558] In some embodiments, the first condition includes at least one of the following: after a first time threshold from the last symbol of the first physical downlink control channel (PDCCH) being transmitted, the first PDCCH being transmitted by the network device using the first beam determined based on the first TCI state; after a first time threshold from the receipt of a resource scheduling request (SR) sent by the terminal; after a first time threshold from the last symbol of the first PDCCH being transmitted, and no fourth information being transmitted within the first time threshold, the fourth information being used to indicate a second TCI state, the second TCI state being used to determine a second beam used by the terminal for communication with the network device.

[0559] In some embodiments, the first information includes a random access message, the random access process corresponding to the random access message is a non-contention-based random access, and the search space corresponding to the first PDCCH is a search space for TCI state update.

[0560] In some embodiments, the first information includes a random access message, the random access process corresponding to the random access message is contention-based random access, and the first PDCCH is a PDCCH used to determine completion of contention-based random access.

[0561] In some embodiments, the method further includes: in response to transmitting fourth information within a first time threshold from the last symbol of the first PDCCH, and determining a second TCI state based on the fourth information. The fourth information is used to indicate the second TCI state, and the second TCI state is used to determine a second beam used by the terminal to communicate with the network device.

[0562] In some embodiments, the processing module 6202 is further configured to: in response to satisfying a second condition, use a second beam determined by a second TCI state for communication transmission.

[0563] In some embodiments, the second condition includes at least one of the following: the fourth information is a media access control element (MAC CE), and the second time threshold has passed since the MAC CE was sent. The fourth information is downlink control information (DCI), and the third time threshold has passed since the DCI was sent. The fourth information is DCI, and the fourth time threshold has passed since the first hybrid automatic repeat request acknowledgment (HARQ ACK) corresponding to the DCI sent by the terminal was received.

[0564] In some embodiments, the fourth information is DCI, and the DCI is used to schedule a channel or signal, which is communicated using the second beam. The second condition includes at least one of the following: a first time interval is greater than or equal to a fifth time threshold, where the first time interval is the time interval between the DCI and the channel or signal scheduled by the DCI. A second time interval is greater than or equal to a sixth time threshold, where the second time interval is the time interval between the DCI and a second HARQ ACK corresponding to the DCI.

[0565] In some embodiments, the fourth information is DCI, and the DCI is used to schedule a channel or signal, the channel or signal uses the first beam for communication, and the first condition includes at least one of the following: the first time interval is less than the fifth time threshold, and after the first time threshold starting from the last symbol of the first PDCCH, the first time interval is the time interval between the DCI and the channel or signal scheduled by the DCI; the second time interval is less than the sixth time threshold, and after the first time threshold starting from the last symbol of the first PDCCH, the second time interval is the time interval between the DCI and the second HARQ ACK corresponding to the DCI.

[0566] In some embodiments, the processing module 6202 determines the time threshold based on at least one of the following: based on a network device, based on a protocol, or based on terminal capability information. The time threshold includes at least one of the following: a first time threshold, a second time threshold, a third time threshold, a fourth time threshold, a fifth time threshold, or a sixth time threshold.

[0567] In some embodiments, the communication transmission includes all communication transmission between the terminal and the network device, or part of the communication transmission between the terminal and the network device.

[0568] In some embodiments, the transceiver module 6201 is further configured to receive the first information in the following manner: receiving the first information in response to satisfying the third condition.

[0569] In some embodiments, the third condition includes at least one of the following: the measurement result of the current beam is lower than the first threshold value, and the current beam includes at least one of the following: the best beam in the beam measurement report last reported by the terminal, the beam last indicated by the network device, all beams in the beam measurement report last reported by the terminal, and the worst beam in the beam measurement report last reported by the terminal. The measurement result of the candidate beam is higher than the second threshold value, and the candidate beam includes at least one of the following: a non-optimal beam in the beam measurement report last reported by the terminal, a beam other than the beam in the beam measurement report last reported by the terminal, and a beam other than the beam last indicated by the network device. The measurement result of the candidate beam is higher than the measurement result of the current beam, and the difference between the measurement result of the candidate beam and the measurement result of the current beam is greater than the third threshold value. The best K beams in the beam measurement report currently reported by the terminal are different from at least one of the best K beams in the beam measurement report last reported by the terminal, and K is a positive integer. The best K beams in the beam measurement report currently reported by the terminal do not include the best beam in the beam measurement report most recently reported by the terminal. The best K beams in the beam measurement report currently reported by the terminal do not include the beam most recently indicated by the network device. The difference in measurement results of at least two of the best K beams in the beam measurement report currently reported by the terminal and the best K beams in the beam measurement report most recently reported by the terminal is greater than a third threshold value. The difference in measurement results of at least two of the worst K beams in the beam measurement report currently reported by the terminal and the worst K beams in the beam measurement report most recently reported by the terminal is greater than a third threshold value.

[0570] Figure 7a is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. Communication device 7100 can be a network device, a terminal, a chip, a chip system, or a processor that supports a network device in implementing any of the above methods, or a chip, a chip system, or a processor that supports a terminal in implementing any of the above methods. Optionally, the network device can be an access network device, a core network device, or the like. Optionally, the terminal can be a user equipment, or the like. Communication device 7100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0571] As shown in Figure 7a, communication device 7100 includes one or more processors 7101. Processor 7101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, while the central processing unit can be used to control the communication device, execute programs, and process program data. Communication device 7100 is used to perform any of the above methods. Optionally, the communication device can be a base station, a baseband chip, a terminal device, a terminal device chip, a DU or CU, etc.

[0572] In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memories 7102 may be located outside the communication device 7100.

[0573] In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the transceiver 7103 performs the communication step S2101 such as sending and / or receiving in the above method, and the processor 7101 performs other steps.

[0574] In some embodiments, a transceiver may include a receiver and / or a transmitter. The receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0575] In some embodiments, the communication device 7100 may include one or more interface circuits 7104. Optionally, the interface circuit 7104 is connected to the memory 7102. The interface circuit 7104 may be configured to receive signals from the memory 7102 or other devices, and may be configured to send signals to the memory 7102 or other devices. For example, the interface circuit 7104 may read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0576] The communication device 7100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7a. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0577] FIG7 b is a schematic diagram of the structure of a chip 7200 according to an embodiment of the present disclosure. If the communication device 7100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 7200 shown in FIG7 b , but the present disclosure is not limited thereto.

[0578] The chip 7200 includes one or more processors 7201 , and the chip 7200 is configured to execute any of the above methods.

[0579] In some embodiments, the chip 7200 further includes one or more interface circuits 7202. Optionally, the interface circuit 7202 is connected to the memory 7203. The interface circuit 7202 can be used to receive signals from the memory 7203 or other devices, and can be used to send signals to the memory 7203 or other devices. For example, the interface circuit 7202 can read instructions stored in the memory 7203 and send the instructions to the processor 7201.

[0580] In some embodiments, the interface circuit 7202 executes the communication step S2101 of sending and / or receiving in the above method, and the processor 7201 executes other steps.

[0581] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0582] In some embodiments, the chip 7200 further includes one or more memories 7203 for storing instructions. Alternatively, all or part of the memories 7203 may be located outside the chip 7200.

[0583] The present disclosure also proposes a storage medium having instructions stored thereon. When the instructions are executed on the communication device 7100, the communication device 7100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a temporary storage medium.

[0584] The present disclosure also provides a program product, which, when executed by the communication device 7100, enables the communication device 7100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0585] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

Claims

1. A communication method, characterized in that, the method comprises: A terminal sends first information to a network device, where the first information is used to determine a first transmission configuration indication state (TCI state), and the first TCI state is used to determine a first beam used for communication between the terminal and the network device.

2. The method according to claim 1, characterized in that, the method further comprises: In response to satisfying a first condition, communication transmission is performed using the first beam determined by the first TCI state.

3. The method according to any one of claims 1-2, characterized in that, the first information comprises at least one of the following: A random access message; A scheduling request (SR).

4. The method according to claim 3, characterized in that, the first information comprises a random access message, the first information is sent based on a first random access resource, and the first random access resource is a random access resource corresponding to a reference signal corresponding to the first TCI state; There is a first correspondence between the random access resource and the reference signal.

5. The method according to claim 4, characterized in that, the method further comprises: receiving second information, where the second information is used to determine the first correspondence.

6. The method according to any one of claims 4-5, characterized in that, the random access resource comprises at least one of the following: A random access time domain resource; A random access frequency domain resource; A random access preamble.

7. The method according to claim 3, characterized in that, the first information comprises the SR, the first information is sent based on a first SR resource, and the first SR resource is an SR resource corresponding to a reference signal corresponding to the first TCI state; There is a second correspondence between the SR resource and the reference signal.

8. The method according to claim 7, characterized in that, the method further comprises: receiving third information, where the third information is used to determine the second correspondence.

9. The method according to any one of claims 3, characterized in that, The first condition comprises at least one of the following: After a first time threshold starting from the last symbol of the first physical downlink control channel (PDCCH) received, the first PDCCH is sent by the network device based on the first beam determined by the first TCI state; After a first time threshold starting from the terminal sending a resource scheduling request (SR); After a first time threshold starting from the last symbol of the first PDCCH received, and within the first time threshold, fourth information is not received, where the fourth information is used to indicate a second TCI state, and the second TCI state is used to determine a second beam used for communication between the terminal and the network device.

10. The method according to claim 9, characterized in that, The first information includes a random access message, the random access procedure corresponding to the random access message is non-competitive random access, and the search space corresponding to the first PDCCH is a search space for TCI state update.

11. The method according to claim 9, wherein, the first information includes a random access message, the random access procedure corresponding to the random access message is contention-based random access, and the first PDCCH is a PDCCH for determining the completion of contention-based random access.

12. The method according to any one of claims 2-8, wherein, the method further includes: in response to receiving fourth information within a first time threshold starting from the last symbol of the received first PDCCH, determining a second TCI state based on the fourth information; the fourth information is used to indicate the second TCI state, and the second TCI state is used to determine a second beam used for communication between the terminal and the network device.

13. The method according to claim 12, wherein, the method further includes: in response to satisfying a second condition, performing communication transmission using the second beam determined by the second TCI state.

14. The method according to claim 13, wherein, the second condition includes at least one of the following: the fourth information is a media access control control element MAC CE, after a second time threshold starting from the reception of the MAC CE; the fourth information is a downlink control information DCI, after a third time threshold starting from the reception of the DCI; the fourth information is DCI, after a fourth time threshold starting from the terminal sending a first hybrid automatic repeat request acknowledgement HARQ ACK corresponding to the DCI .

15. The method according to claim 13, wherein, the fourth information is DCI, and the DCI is used to schedule a channel or a signal, and the channel or the signal communicates using the second beam; the second condition includes at least one of the following: a first time interval is greater than or equal to a fifth time threshold, and the first time interval is a time interval between the DCI and the channel or signal scheduled by the DCI; a second time interval is greater than or equal to a sixth time threshold, and the second time interval is a time interval between the DCI and a second HARQ ACK corresponding to the DCI.

16. The method according to claim 13, wherein, the fourth information is DCI, and the DCI is used to schedule a channel or a signal, and the channel or the signal communicates using a first beam, and the first condition includes at least one of the following: the first time interval is less than the fifth time threshold, and after a first time threshold starting from the last symbol of the received first PDCCH, the first time interval is a time interval between the DCI and the channel or signal scheduled by the DCI; The second time interval is less than the sixth time threshold, and after the first time threshold starting from the last symbol of the first PDCCH received, the second time interval is the time interval between the DCI and the second HARQ ACK corresponding to the DCI.

17. The method according to any one of claims 9-16, wherein, the time threshold is determined based on at least one of the following methods: determined based on the fifth information sent by the network device, where the fifth information is used to indicate the time threshold; determined based on the protocol; determined based on the terminal capability information; the time threshold includes at least one of the following: a first time threshold, a second time threshold, a third time threshold, a fourth time threshold, a fifth time threshold, a sixth time threshold.

18. The method according to any one of claims 1-17, wherein, the communication includes all communications between the terminal and the network device, or partial communications between the terminal and the network device.

19. The method according to any one of claims 1-18, wherein, sending the first information includes: sending the first information in response to satisfying a third condition.

20. The method according to claim 19, wherein, the third condition includes at least one of the following: the measurement result of the current beam is lower than the first threshold, and the current beam includes at least one of the following: the best beam in the beam measurement report reported by the terminal most recently, the beam indicated by the network device most recently, all the beams in the beam measurement report reported by the terminal most recently, the worst beam in the beam measurement report reported by the terminal most recently; the measurement result of the candidate beam is higher than the second threshold, and the candidate beam includes at least one of the following: the non-best beam in the beam measurement report reported by the terminal most recently, the beam other than the beam in the beam measurement report reported by the terminal most recently, the beam other than the beam indicated by the network device most recently; the measurement result of the candidate beam is higher than the measurement result of the current beam, and the difference between the measurement result of the candidate beam and the measurement result of the current beam is greater than the third threshold; at least one of the best K beams in the beam measurement report currently reported by the terminal is different from the best K beams in the beam measurement report reported by the terminal most recently, where K is a positive integer; the best K beams in the beam measurement report currently reported by the terminal do not include the best beam in the beam measurement report reported by the terminal most recently; the best K beams in the beam measurement report currently reported by the terminal do not include the beam indicated by the network device most recently; the difference between the measurement results of at least two best beams in the best K beams in the beam measurement report currently reported by the terminal and the best K beams in the beam measurement report reported by the terminal most recently is greater than the third threshold; the difference between the measurement results of at least two worst beams in the worst K beams in the beam measurement report currently reported by the terminal and the worst K beams in the beam measurement report reported by the terminal most recently is greater than the third threshold.

21. A communication method, wherein, the method includes: The network device receives the first information sent by the terminal, where the first information is used to determine the first Transmission Configuration Indicator state (TCI state), and the first TCI state is used to determine the first beam used by the terminal to communicate with the network device.

22. The method according to claim 21, wherein, the method further includes: responding to meeting the first condition, and performing communication transmission using the first beam determined by the first TCI state.

23. The method according to any one of claims 21-22, wherein, the first information includes at least one of the following: a random access message; a Scheduling Request (SR).

24. The method according to claim 23, wherein, the first information includes a random access message, the first information is received based on a first random access resource, and the first random access resource is a random access resource corresponding to a reference signal corresponding to the first TCI state; there is a first corresponding relationship between the random access resource and the reference signal.

25. The method according to claim 24, wherein, the method further includes: sending second information, where the second information is used to determine the first corresponding relationship.

26. The method according to any one of claims 24-25, wherein, the random access resource includes at least one of the following: a random access time domain resource; a random access frequency domain resource; a random access preamble.

27. The method according to claim 23, wherein, the first information includes the SR, the first information is received based on a first SR resource, and the first SR resource is an SR resource corresponding to a reference signal corresponding to the first TCI state; there is a second corresponding relationship between the SR resource and the reference signal.

28. The method according to claim 27, wherein, the method further includes: sending third information, where the third information is used to determine the second corresponding relationship.

29. The method according to any one of claims 23, wherein, the first condition includes at least one of the following: after a first time threshold starting from the last symbol of the first Physical Downlink Control Channel (PDCCH) sent, the first PDCCH is sent by the network device based on the first beam determined by the first TCI state; after a first time threshold starting from receiving the resource scheduling request SR sent by the terminal; after a first time threshold starting from the last symbol of the first PDCCH sent, and within the first time threshold, no fourth information is sent, where the fourth information is used to indicate a second TCI state, and the second TCI state is used to determine the second beam used by the terminal to communicate with the network device.

30. The method according to claim 29, wherein, the first information includes a random access message, and the random access process corresponding to the random access message is non-competitive random access, and the search space corresponding to the first PDCCH is a search space for TCI state update.

31. The method according to claim 29, wherein, the first information includes a random access message, the random access process corresponding to the random access message is contention-based random access, and the first PDCCH is a PDCCH for determining the completion of contention-based random access.

32. The method according to any one of claims 22-28, wherein, the method further includes: responding to sending fourth information within a first time threshold starting from the last symbol of the first PDCCH, and determining a second TCI state based on the fourth information; the fourth information is used to indicate the second TCI state, and the second TCI state is used to determine a second beam used for communication between the terminal and the network device.

33. The method according to claim 32, wherein, the method further includes: responding to meeting a second condition, and performing communication transmission using the second beam determined by the second TCI state.

34. The method according to claim 33, wherein, the second condition includes at least one of the following: the fourth information is a media access control control element MAC CE, after a second time threshold starting from sending the MAC CE; the fourth information is a downlink control information DCI, after a third time threshold starting from sending the DCI; the fourth information is DCI, after a fourth time threshold starting from receiving a first hybrid automatic repeat request acknowledgement HARQ ACK corresponding to the DCI sent by the terminal.

35. The method according to claim 33, wherein, the fourth information is DCI, and the DCI is used to schedule a channel or a signal, and the channel or the signal performs communication using the second beam; the second condition includes at least one of the following: a first time interval is greater than or equal to a fifth time threshold, and the first time interval is a time interval between the DCI and the channel or the signal scheduled by the DCI; a second time interval is greater than or equal to a sixth time threshold, and the second time interval is a time interval between the DCI and a second HARQ ACK corresponding to the DCI.

36. The method according to claim 35, wherein, the fourth information is DCI, and the DCI is used to schedule a channel or a signal, and the channel or the signal performs communication using a first beam, and the first condition includes at least one of the following: the first time interval is less than the fifth time threshold, and after a first time threshold starting from the last symbol of the first PDCCH, the first time interval is a time interval between the DCI and the channel or the signal scheduled by the DCI; the second time interval is less than the sixth time threshold, and after a first time threshold starting from the last symbol of the first PDCCH, the second time interval is a time interval between the DCI and a second HARQ ACK corresponding to the DCI.

37. The method according to any one of claims 29-36, wherein, The time threshold is determined based on at least one of the following methods: Determined based on the network device; Determined based on the protocol; Determined based on the terminal capability information; The time threshold includes at least one of the following: a first time threshold, a second time threshold, a third time threshold, a fourth time threshold, a fifth time threshold, and a sixth time threshold.

38. The method according to any one of claims 21-37, wherein, The communication transmission includes all communication transmissions between the terminal and the network device, or partial communication transmissions between the terminal and the network device.

39. The method according to any one of claims 21-38, wherein, Receiving the first information includes: Receiving the first information in response to satisfying a third condition.

40. The method according to claim 39, wherein, The third condition includes at least one of the following: The measurement result of the current beam is lower than a first threshold value. The current beam includes at least one of the following: the best beam in the beam measurement report last reported by the terminal, the beam last indicated by the network device, all beams in the beam measurement report last reported by the terminal, and the worst beam in the beam measurement report last reported by the terminal; The measurement result of the candidate beam is higher than a second threshold value. The candidate beam includes at least one of the following: non-best beams in the beam measurement report last reported by the terminal, beams other than the beams in the beam measurement report last reported by the terminal, and beams other than the beam last indicated by the network device; The measurement result of the candidate beam is higher than the measurement result of the current beam, and the difference between the measurement result of the candidate beam and the measurement result of the current beam is greater than a third threshold value; At least one of the best K beams in the beam measurement report currently reported by the terminal is different from the best K beams in the beam measurement report last reported by the terminal, where K is a positive integer; The best K beams in the beam measurement report currently reported by the terminal do not include the best beam in the beam measurement report last reported by the terminal; The best K beams in the beam measurement report currently reported by the terminal do not include the beam last indicated by the network device; The difference between the measurement results of at least two best beams in the best K beams in the beam measurement report currently reported by the terminal and the best K beams in the beam measurement report last reported by the terminal is greater than a third threshold value; The difference between the measurement results of at least two worst beams in the worst K beams in the beam measurement report currently reported by the terminal and the worst K beams in the beam measurement report last reported by the terminal is greater than a third threshold value.

41. A communication method, wherein, The method includes: The terminal sends first information to the network device. The first information is used to determine a first transmission configuration indication state (TCI state). The first TCI state is used to determine the first beam used for communication between the terminal and the network device; The network device receives the first information.

42. A terminal, wherein, including: A transceiver module, configured to enable a terminal to send a first piece of information to a network device, where the first piece of information is used to determine a first transmission configuration indication (TCI) state, and the first TCI state is used to determine a first beam used for communication between the terminal and the network device.

43. A network device, characterized in that it includes: A transceiver module, configured to enable the network device to receive the first piece of information sent by the terminal, where the first piece of information is used to determine a first transmission configuration indication (TCI) state, and the first TCI state is used to determine a first beam used for communication between the terminal and the network device.

44. A terminal, characterized in that it includes: One or more processors; wherein, the processor is configured to execute the communication method according to any one of claims 1-20.

45. A network device, characterized in that it includes: One or more processors; wherein, the processor is configured to execute the communication method according to any one of claims 21-40.

46. A communication system, characterized in that it includes a terminal and a network device, wherein the terminal is configured to implement the communication method according to any one of claims 1-20, and the network device is configured to implement the communication method according to any one of claims 21-40.

47. A storage medium storing instructions, characterized in that when the instructions run on a communication device, the communication device is caused to execute the communication method according to any one of claims 1-20 or 21-40.

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