Communication method and apparatus

Abstract

The present application provides a communication method and an apparatus. In the method, when a terminal moves between multiple transmission and reception points (TRPs) and the multiple TRPs correspond to the same timing advance group (TAG), the terminal and a network device may not transmit (for example, pause transmitting) a signal or channel corresponding to the TAG and indicated by a random access response, thereby avoiding data transmission failure. Not until the terminal receives a transmission configuration indication state (TCI state) indication, will the terminal and the network device transmit, on the basis of the TCI state indication, the signal or channel corresponding to the TAG, thereby helping to reduce cell interference.

Description

Communication method and device

[0001] This application claims priority to the Chinese patent application with application number 202311128644.4 filed with the State Intellectual Property Office of China on August 30, 2023, and priority to the Chinese patent application with the invention name “A Communication Method and Device”, all contents of which are incorporated by reference into this application. Technical Field

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

[0003] Access network equipment (such as base stations) can communicate with terminals using multiple transmission and reception points (mTRPs) within the same cell. Different TRPs have different TA values. For example, when a terminal moves from one TRP to another, the TA needs to be updated. This can prevent cell interference or data transmission failures caused by TA updates when a terminal moves between multiple TRPs.

[0004] Summary of the Invention

[0005] The present application provides a communication method and apparatus, in which a terminal can suspend the transmission of corresponding channels and signals when moving between multiple transmission and reception points in the same service cell, thereby avoiding data transmission failure and reducing cell interference.

[0006] In a first aspect, the present application provides a communication method, which is performed by a first device. The first device may be a terminal, a component of a terminal (such as a processor, a chip, or a chip system, etc.), or a logic module that can implement all or part of the terminal functions. The first device receives a random access response, which includes a timing advance TA of a first timing advance group TAG. The first device does not transmit a signal or channel corresponding to the first TAG. The first device receives first indication information, which is used to indicate a first transmission configuration indication state TCI state, and the first TCI state corresponds to the first TAG. The first device transmits a signal or channel corresponding to the first TAG based on the first indication information.

[0007] In this method, when a terminal moves between multiple transmission and reception points (TRPs) corresponding to the same TAG, the first device may not transmit the signal or channel corresponding to the TAG indicated by the random access response, thereby avoiding data transmission failures. After the first device receives a TCI state indication, it then transmits the signal or channel corresponding to the TAG based on the TCI state indication, which helps reduce cell interference.

[0008] In a possible implementation, after the first device receives the random access response and before receiving the first indication information, the first device does not transmit a signal or channel corresponding to the first TAG.

[0009] In this method, the first device is further limited to not transmitting the signal or channel corresponding to the first TAG within a first time interval to avoid data transmission failure. For example, the first time interval is the period after the first device receives the random access response and before receiving the first indication information. The first device does not transmit the signal or channel corresponding to the first TAG during the first time interval.

[0010] In a possible implementation, when the first indication information is not received, the first device does not transmit the signal or channel corresponding to the first TAG.

[0011] In one possible implementation, assuming that the signal or channel corresponds to a first resource, the first resource corresponds to a first TAG, the first device does not send an uplink signal or channel via the first resource, or the first device does not receive a downlink signal or channel on the first resource.

[0012] In this method, assuming that there is a first resource corresponding to a signal or channel, and the first resource corresponds to a first TAG, the first device does not transmit the signal or channel corresponding to the first TAG through the first resource within the first time interval, thereby avoiding data transmission failure and helping to reduce cell interference.

[0013] In a possible implementation, if the second resource exists, the first device transmits the signal or channel through the second resource, wherein the second resource corresponds to a second TAG, and the second TAG is different from the first TAG.

[0014] In this method, assuming that there is a second resource corresponding to the signal or channel, and the second resource corresponds to the second TAG, and the second TAG is different from the first TAG, the signal or channel corresponding to the second TAG is not affected, and the first device can normally transmit the signal or channel corresponding to the second TAG within the first time interval.

[0015] In a possible implementation, after the first device receives the random access response, the first device applies the TA of the first TAG. After receiving the first indication information, the first device sends an uplink signal or channel corresponding to the first TAG based on the TA.

[0016] In this method, after receiving the TA of the first TAG, the first device may immediately apply the TA, but not transmit the signal or channel corresponding to the first TAG within a first time interval. Furthermore, after receiving the first indication information, the first device may transmit the signal or channel corresponding to the first TAG based on the TA of the first TAG, thereby avoiding data transmission failures and reducing cell interference.

[0017] In one possible implementation, before the first device receives the random access response, the first device receives second indication information, where the second indication information is used to indicate a second TCI state corresponding to the first TAG. The first device transmits a signal or channel corresponding to the first TAG.

[0018] In this method, before receiving the random access response, the first device may receive a second TCI state indication after initially accessing the serving cell, and the second TCI state corresponds to the first TAG. The first device may transmit a signal or channel corresponding to the first TAG.

[0019] In one possible implementation, before receiving a random access response, the first device sends a measurement result of a first reference signal, where the measurement result of the first reference signal indicates a reference signal received power (RSRP) of the first reference signal; both the first reference signal and the second reference signal correspond to a first TAG. The first device receives random access indication information, where the random access indication information is used to instruct the terminal to initiate a random access procedure based on the random access configuration of the first reference signal. The TA in the random access response message is determined based on a random access preamble of the first reference signal, and the random access preamble of the first reference signal is determined based on the random access configuration of the first reference signal.

[0020] In this method, after the first device initially accesses the service cell, the first device can move between multiple TRPs and re-initiate the random access process based on the change of the reference signal receiving power to obtain the TA of the TAG.

[0021] In a second aspect, the present application provides a communication method, which is performed by a first device. The first device may be a terminal, a component of a terminal (such as a processor, a chip, or a chip system, etc.), or a logic module that can implement all or part of the terminal functions. The first device receives a random access response, which includes a TA of a first TAG. The first device receives first indication information, which is used to indicate a first transmission configuration indication state TCI state, and the first TCI state corresponds to a first TAG. The first device applies the TA after receiving the first indication information. Based on the TA, the first device sends an uplink signal or channel corresponding to the first TAG.

[0022] In this method, when a terminal moves between multiple TRPs corresponding to the same TAG, the first device can delay applying the TA. For example, after receiving the TA for the first TAG, the first device does not apply the TA, but instead applies the TA after receiving the first TCI state indication, which helps reduce cell interference.

[0023] In one possible implementation, before receiving the random access response, the first device receives second indication information, where the second indication information is used to indicate a second TCI state corresponding to the first TAG. The first device transmits a signal or channel corresponding to the first TAG.

[0024] In this method, before receiving the random access response, the first device may receive a second TCI state indication after initially accessing the serving cell, and the second TCI state corresponds to the first TAG. The first device may transmit a signal or channel corresponding to the first TAG.

[0025] In a possible implementation, before applying the TA, the first device transmits a signal or channel corresponding to the first TAG according to the second TCI state.

[0026] In this method, when the first device delays applying the TA, before applying the TA, the first device may continue to transmit the signal or channel corresponding to the first TAG according to the TCI state of the initial access serving cell.

[0027] In a third aspect, the present application provides a communication method, which is performed by a second device. The second device may be a network device (such as a base station), a component of a network device (such as a processor, a chip, or a chip system, etc.), or a logic module that can implement all or part of the functions of the network device. The second device sends a random access response, which includes a timing advance TA of a first timing advance group TAG. The second device does not transmit a signal or channel corresponding to the first TAG. The second device sends a first indication information, which is used to indicate a first transmission configuration indication state TCI state, and the first TCI state corresponds to the first TAG. The second device transmits a signal or channel corresponding to the first TAG based on the first indication information.

[0028] In this method, when the terminal moves between multiple transmission and reception points TRPs, and multiple TRPs correspond to the same TAG, the second device can suspend sending or receiving the signal or channel corresponding to the first TAG, and indicate the TA of the first TAG to the first device, so that the first device can choose to apply the TA immediately or delay the application of the TA, which is conducive to reducing cell interference.

[0029] In one possible implementation, before sending the random access response, the second device sends second indication information, where the second indication information is used to indicate a second TCI state corresponding to the first TAG. The second device transmits a signal or channel corresponding to the first TAG.

[0030] In this method, before the second device sends a random access response, after the first device initially accesses the serving cell, the second device may send a second TCI state indication to the first device, where the second TCI state corresponds to the first TAG. The second device may transmit a signal or channel corresponding to the first TAG.

[0031] In a fourth aspect, the present application provides a communication method, which is performed by a first device. The first device may be a terminal, a component of a terminal (such as a processor, a chip, or a chip system, etc.), or a logic module that can implement all or part of the terminal functions. The first device receives a first indication message and a TA command, wherein the first indication message is used to indicate a first TCI state, and the first TCI state corresponds to a first TAG; the TA command includes a TA of the first TAG, and the first indication message and the TA command are in the same protocol data unit. The first device applies TA.

[0032] In this method, when a terminal moves between multiple transmission and reception points (TRPs) corresponding to the same TAG, the first device can receive a first TCI state indication and a TA command after re-initiating a random access procedure. The first TCI state indication and the TA command are contained in the same protocol data unit. Therefore, the first device does not use the TA to transmit signals or channels to the TRP to which it was connected before the movement, thus avoiding data transmission failures and reducing cell interference.

[0033] In a possible implementation, the first device applies TA after receiving the first indication information and the TA command.

[0034] In this method, it is specifically stipulated that the first device needs to apply TA after receiving the first indication information and the TA command to avoid data transmission failure.

[0035] In a possible implementation, the first device sends an uplink signal or channel corresponding to the first TAG based on the TA.

[0036] In one possible implementation, before receiving the first indication information and the TA command, the first device receives second indication information, where the second indication information is used to indicate a second TCI state corresponding to the first TAG. The first device transmits a signal or channel corresponding to the first TAG.

[0037] In this method, before receiving the first indication information and the TA command, the first device can receive a second TCI state indication after initially accessing the serving cell, and the second TCI state corresponds to the first TAG, and the first device can transmit the signal or channel corresponding to the first TAG.

[0038] In one possible implementation, before receiving the first indication information and the TA command, the first device sends a measurement result of a first reference signal, where the measurement result of the first reference signal indicates the reference signal received power (RSRP) of the first reference signal; both the first reference signal and the second reference signal correspond to the first TAG. The first device receives random access indication information, where the random access indication information is used to instruct the terminal to initiate a random access procedure based on the random access configuration of the first reference signal. The TA in the random access response message is determined based on the random access preamble of the first reference signal, and the random access preamble of the first reference signal is determined based on the random access configuration of the first reference signal.

[0039] In this method, after the first device initially accesses the serving cell, the first device may move between multiple TRPs and re-initiate a random access process based on a change in reference signal received power RSRP to obtain a TA of the TAG.

[0040] In a fifth aspect, the present application provides a communication method, which is performed by a second device. The second device may be a network device (such as a base station), a component of a network device (such as a processor, a chip, or a chip system, etc.), or a logic module that can implement all or part of the functions of the network device. The second device sends a first indication message and a TA command, the first indication message is used to indicate a first TCI state, and the first TCI state corresponds to a first TAG; the TA command includes the TA of the first TAG. The first indication message and the TA command are in the same protocol data unit.

[0041] In this method, when a terminal moves between multiple transmission and reception points (TRPs) corresponding to the same TAG, the second device can send a first TCI state indication and a TA command in the same protocol data unit. Therefore, the terminal does not use the TA to transmit signals or channels to the TRP to which it was connected before the movement, thus avoiding data transmission failures and reducing cell interference.

[0042] In one possible implementation, before sending the first indication information, the second device sends second indication information, where the second indication information is used to indicate a second TCI state corresponding to the first TAG. The second device transmits a signal or channel corresponding to the first TAG based on the second indication information.

[0043] In this method, after the first device initially accesses the serving cell, the second device may indicate the initial TCI state to the first device and transmit a signal or channel corresponding to the first TAG.

[0044] In one possible implementation, before sending the first indication information, the second device receives a measurement result of the first reference signal, where the measurement result of the first reference signal indicates the reference signal received power (RSRP) of the first reference signal. The second device determines a physical cell identifier corresponding to the second reference signal and a random access configuration of the first reference signal. The second device sends random access indication information, where the random access indication information is used to instruct the terminal to initiate a random access process based on the random access configuration of the first reference signal. The second device receives a random access preamble of the first reference signal, where the random access preamble corresponds to a first TAG. The second device determines a TA of the first TAG based on the random access preamble of the first reference signal.

[0045] In this method, after the first device initially accesses the serving cell, the first device may move between multiple TRPs and trigger a random access process based on changes in the reference signal received power RSRP to obtain a new TA.

[0046] In a sixth aspect, the present application provides a communication method, which is performed by a first device. The first device may be a terminal, a component of a terminal (such as a processor, a chip, or a chip system), or a logic module that can implement all or part of the terminal functions. The first device receives first information, the first information is used to indicate a first TCI state, and the first TCI state corresponds to a first TAG. Based on the first information, the first device stops the timing advance timer TAT of the first TAG.

[0047] In this method, when the terminal moves between multiple transmission and reception points TRPs and the multiple TRPs correspond to the same TAG, the base station adds indication information in the control element MAC CE of the media access control to indicate the TCI state, thereby instructing the first device to stop the TAT of the TAG, which is beneficial to reducing cell interference.

[0048] In a possible implementation manner, the first information is further used to instruct the first device to initiate a random access process.

[0049] In the method, the first information is also used to instruct the first device to initiate a random access process to reacquire the TA.

[0050] In a possible implementation, the first device receives third indication information, where the third indication information is used to instruct the first device to initiate a random access process. The first information and the third indication information are in the same protocol data unit.

[0051] In this method, the third indication information instructing the first device to initiate a random access process may be different from the first information, but in the same protocol data unit, the first device may initiate a random access process according to the third indication information and may reacquire the TA.

[0052] In one possible implementation, the first device receives fourth indication information, where the fourth indication information is used to instruct the first device to transmit data based on a TA of the first TAG. The first device transmits an uplink signal or channel corresponding to the first TAG based on the TA of the first TAG.

[0053] In the method, the first device receives fourth indication information, which instructs the first device to continue data transmission based on the TA of the first TAG to avoid data transmission failure.

[0054] In a possible implementation manner, the first information includes an identifier of the first TAG and / or a non-contention random access resource.

[0055] In one possible implementation, before receiving the first information, the first device receives second indication information, where the second indication information is used to indicate a second TCI state corresponding to the first TAG. The first device transmits a signal or channel corresponding to the first TAG.

[0056] In this method, before the first device receives the first information, it can receive a second TCI state indication after initially accessing the serving cell, and the second TCI state corresponds to the first TAG. The first device can transmit a signal or channel corresponding to the first TAG.

[0057] In one possible implementation, before receiving the first information, the first device sends a measurement result of a first reference signal, where the measurement result of the first reference signal indicates a reference signal received power (RSRP) of the first reference signal; both the first reference signal and the second reference signal correspond to a first TAG. The first device receives random access indication information, where the random access indication information is used to instruct the terminal to initiate a random access procedure based on the random access configuration of the first reference signal. The TA in the random access response message is determined based on the random access preamble of the first reference signal, and the random access preamble of the first reference signal is determined based on the random access configuration of the first reference signal.

[0058] In this method, after the first device initially accesses the serving cell, the first device may move between multiple TRPs and trigger a random access process based on a change in reference signal received power RSRP to obtain a new TA.

[0059] In a seventh aspect, the present application provides a communication method, which is performed by a second device. The second device can be a network device (such as a base station), a component of a network device (such as a processor, a chip, or a chip system), or a logic module that can implement all or part of the network device functions. The second device sends first information, and the first information is used to indicate a first TCI state, and the first TCI state corresponds to a first TAG.

[0060] In this method, when the terminal moves between multiple transmission and reception points TRPs and the multiple TRPs correspond to the same TAG, the second device adds indication information in the control element MAC CE of the media access control to indicate the TCI state, thereby instructing the terminal to stop the TAT of the TAG, which is beneficial to reducing cell interference.

[0061] In a possible implementation manner, the first information is further used to instruct the first device to initiate a random access process.

[0062] In the method, the first information is also used to instruct the first device to initiate a random access process to reacquire the TA.

[0063] In a possible implementation, the second device sends third indication information, where the third indication information is used to instruct the first device to initiate a random access process. The first information and the third indication information are in the same protocol data unit.

[0064] In this method, the third indication information instructing the first device to initiate a random access process may be different from the first information, but in the same protocol data unit, thereby instructing the first device to initiate a random access process and reacquire the TA.

[0065] In one possible implementation, the second device sends fourth indication information, where the fourth indication information is used to instruct the first device to transmit data based on the TA of the first TAG. The second device transmits an uplink signal or channel corresponding to the first TAG based on the TA of the first TAG.

[0066] In this method, the second device indicates the TA of the first TAG to the first device through the fourth indication information, so that the terminal can continue to use the TA of the first TAG to avoid data transmission failure.

[0067] In a possible implementation manner, the first information includes an identifier of the first TAG and / or a non-contention random access resource.

[0068] In one possible implementation, before sending the first information, the second device sends second indication information, where the second indication information is used to indicate a second TCI state corresponding to the first TAG. The second device transmits a signal or channel corresponding to the first TAG.

[0069] In this method, after the first device initially accesses the serving cell, the second device may send a second TCI state indication, and the second TCI state corresponds to the first TAG, and the second device may transmit a signal or channel corresponding to the first TAG.

[0070] In one possible implementation, before sending the first information, the second device receives a measurement result of the first reference signal, where the measurement result of the first reference signal indicates the reference signal received power (RSRP) of the first reference signal. The second device determines a physical cell identifier corresponding to the second reference signal and a random access configuration of the first reference signal. The second device sends random access indication information, where the random access indication information is used to instruct the terminal to initiate a random access process based on the random access configuration of the first reference signal. The second device receives a random access preamble of the first reference signal, where the random access preamble corresponds to a first TAG. The second device determines a TA of the first TAG based on the random access preamble of the first reference signal.

[0071] In this method, after the first device initially accesses the serving cell, the first device may move between multiple TRPs and re-trigger the random access process based on the reference signal received power RSRP of the reference signal to obtain a new TA.

[0072] In an eighth aspect, the present application provides a communication device. The communication device may be a terminal, a device for a terminal, or a device capable of being used in conjunction with a terminal. In one possible implementation, the communication device may include a functional module, which may be implemented as a hardware circuit, software, or a combination of hardware circuit and software.

[0073] In one possible implementation, the communication device includes a communication unit and a processing unit. The communication unit is configured to receive a random access response, the random access response including a timing advance (TA) of a first timing advance group (TAG). The processing unit is configured to determine not to transmit a signal or channel corresponding to the first TAG. The communication unit is configured to receive first indication information, the first indication information being configured to indicate a first transmission configuration indication (TCI) state, the first TCI state corresponding to the first TAG. The processing unit is configured to transmit, via the communication unit, the signal or channel corresponding to the first TAG based on the first indication information.

[0074] In a possible implementation, after the communication unit receives the random access response and before receiving the first indication information, the processing unit is configured to determine not to transmit a signal or channel corresponding to the first TAG.

[0075] In a possible implementation, when the first indication information is not received, the processing unit is configured to determine not to transmit the signal or channel corresponding to the first TAG.

[0076] In one possible implementation, assuming that the signal or channel corresponds to a first resource and the first resource corresponds to a first TAG, the processing unit does not send an uplink signal or channel on the first resource through the communication unit; or the communication unit is configured not to receive a downlink signal or channel on the first resource.

[0077] In a possible implementation, if the second resource exists, the communication unit is configured to transmit a signal or channel through the second resource, wherein the second resource corresponds to a second TAG, and the second TAG is different from the first TAG.

[0078] In one possible implementation, after the communication unit receives the random access response, the processing unit is configured to apply the TA of the first TAG. After the communication unit receives the first indication information, the processing unit is configured to send an uplink signal or channel corresponding to the first TAG through the communication unit based on the TA.

[0079] In one possible implementation, before the communication unit receives the random access response, the communication unit is further configured to receive second indication information, where the second indication information is used to indicate a second TCI state, where the second TCI state corresponds to the first TAG, and the communication unit is configured to transmit a signal or channel corresponding to the first TAG.

[0080] In one possible implementation, before the communication unit receives a random access response, the communication unit is further configured to send a measurement result of a first reference signal, where the measurement result of the first reference signal indicates a reference signal received power (RSRP) of the first reference signal; both the first reference signal and the second reference signal correspond to a first TAG. The communication unit is further configured to receive random access indication information, where the random access indication information is used to instruct the terminal to initiate a random access procedure based on the random access configuration of the first reference signal. The TA in the random access response message is determined based on the random access preamble of the first reference signal, and the random access preamble of the first reference signal is determined based on the random access configuration of the first reference signal.

[0081] In a ninth aspect, the present application provides a communication device. The communication device may be a terminal, a device for a terminal, or a device capable of being used in conjunction with a terminal. In one possible implementation, the communication device may include a functional module, which may be implemented as a hardware circuit, software, or a combination of hardware circuit and software.

[0082] In one possible implementation, the communication device includes a communication unit and a processing unit. The communication unit is configured to receive a random access response, the random access response including a TA for a first TAG. The communication unit is further configured to receive first indication information, the first indication information indicating a first transmission configuration indication state (TCI) state, the first TCI state corresponding to the first TAG. After receiving the first indication information, the processing unit is configured to apply the TA. Based on the TA, the processing unit transmits, via the communication unit, an uplink signal or channel corresponding to the first TAG.

[0083] In one possible implementation, before the communication unit receives the random access response, the communication unit is further configured to receive second indication information, where the second indication information is used to indicate a second TCI state, where the second TCI state corresponds to the first TAG. The communication unit is further configured to transmit a signal or channel corresponding to the first TAG.

[0084] In a possible implementation, before applying the TA, the processing unit is configured to transmit a signal or channel corresponding to the first TAG through the communication unit according to the second TCI state.

[0085] In a tenth aspect, the present application provides a communication device. The communication device may be a network device, a device of a network device, or a device capable of being used in conjunction with a network device. In one possible implementation, the communication device may include a functional module, which may be implemented as a hardware circuit, software, or a combination of hardware circuit and software.

[0086] In one possible implementation, the communication device includes a communication unit and a processing unit. The communication unit is configured to send a random access response, the random access response including a timing advance (TA) of a first timing advance group (TAG). The communication unit is configured to not transmit the TA corresponding to the first TAG. The communication unit is further configured to send first indication information, the first indication information being configured to indicate a first transmission configuration indication (TCI) state, the first TCI state corresponding to the first TAG. The processing unit is configured to transmit, via the communication unit, a signal or channel corresponding to the first TAG based on the first indication information.

[0087] In one possible implementation, before the communication unit sends the random access response, the communication unit is further configured to send second indication information, where the second indication information is used to indicate a second TCI state, where the second TCI state corresponds to the first TAG. The communication unit is further configured to transmit a signal or channel corresponding to the first TAG.

[0088] In an eleventh aspect, the present application provides a communication device. The communication device may be a terminal, a device for a terminal, or a device capable of being used in conjunction with a terminal. In one possible implementation, the communication device may include a functional module, which may be implemented as a hardware circuit, software, or a combination of hardware circuits and software.

[0089] In one possible implementation, the communication device includes a communication unit and a processing unit. The communication unit is configured to receive first indication information and a TA command, wherein the first indication information indicates a first TCI state corresponding to a first TAG; the TA command includes a TA for the first TAG, and the first indication information and the TA command are contained in the same protocol data unit. The processing unit is configured to apply the TA.

[0090] In a possible implementation, the processing unit is configured to apply TA after receiving the first indication information and the TA command.

[0091] In a possible implementation, the processing unit sends an uplink signal or channel corresponding to the first TAG through the communication unit based on the TA.

[0092] In one possible implementation, before receiving the first indication information and the TA command, the communication unit is configured to receive second indication information indicating a second TCI state corresponding to the first TAG. The communication unit is further configured to transmit a signal or channel corresponding to the first TAG.

[0093] In one possible implementation, before receiving the first indication information and the TA command, the communication unit is configured to send a measurement result of a first reference signal, where the measurement result of the first reference signal indicates a reference signal received power (RSRP) of the first reference signal; both the first reference signal and the second reference signal correspond to a first TAG. The communication unit is further configured to receive random access indication information, where the random access indication information is configured to instruct the terminal to initiate a random access procedure based on the random access configuration of the first reference signal. The TA in the random access response message is determined based on the random access preamble of the first reference signal, and the random access preamble of the first reference signal is determined based on the random access configuration of the first reference signal.

[0094] In a twelfth aspect, the present application provides a communication device. The communication device may be a network device, a device of a network device, or a device capable of being used in conjunction with a network device. In one possible implementation, the communication device may include a functional module, which may be implemented as a hardware circuit, software, or a combination of hardware circuit and software.

[0095] In one possible implementation, the communication device includes a communication unit and a processing unit. The communication unit is configured to send first indication information and a TA command, where the first indication information indicates a first TCI state corresponding to a first TAG; and the TA command includes a TA for the first TAG. The first indication information and the TA command are contained in the same protocol data unit.

[0096] In one possible implementation, before the communication unit sends the first indication information, the communication unit is further configured to send second indication information, where the second indication information is configured to indicate a second TCI state, where the second TCI state corresponds to the first TAG. The processing unit is configured to transmit, through the communication unit, a signal or channel corresponding to the first TAG based on the second indication information.

[0097] In one possible implementation, before the communication unit sends the first indication information, the communication unit is configured to receive a measurement result of a first reference signal, where the measurement result of the first reference signal indicates the reference signal received power (RSRP) of the first reference signal. The processing unit is configured to determine a physical cell identifier corresponding to the second reference signal and a random access configuration of the first reference signal. The communication unit is further configured to send random access indication information, where the random access indication information is configured to instruct the terminal to initiate a random access procedure based on the random access configuration of the first reference signal. The communication unit is further configured to receive a random access preamble of the first reference signal, where the random access preamble corresponds to a first TAG. The processing unit is further configured to determine a TA of the first TAG based on the random access preamble of the first reference signal.

[0098] In a thirteenth aspect, the present application provides a communication device. The communication device may be a terminal, a device for a terminal, or a device capable of being used in conjunction with a terminal. In one possible implementation, the communication device may include a functional module, which may be implemented as a hardware circuit, software, or a combination of hardware circuits and software.

[0099] In one possible implementation, the communication device includes a communication unit and a processing unit. The communication unit is configured to receive first information indicating a first TCI state corresponding to a first TAG. The processing unit is configured to stop a timing advance timer (TAT) of the first TAG based on the first information.

[0100] In a possible implementation manner, the first information is further used to instruct the first device to initiate a random access process.

[0101] In a possible implementation, the communication unit is configured to receive third indication information, where the third indication information is configured to instruct the first device to initiate a random access process. The first information and the third indication information are in the same protocol data unit.

[0102] In one possible implementation, the communication unit is configured to receive fourth indication information, the fourth indication information being configured to instruct the first device to transmit data based on the TA of the first TAG. The processing unit is configured to transmit an uplink signal or channel corresponding to the first TAG through the communication unit based on the TA of the first TAG.

[0103] In a possible implementation manner, the first information includes an identifier of the first TAG and / or a non-contention random access resource.

[0104] In one possible implementation, before receiving the first information, the communication unit is configured to receive second indication information indicating a second TCI state corresponding to the first TAG. The communication unit is further configured to transmit a signal or channel corresponding to the first TAG.

[0105] In one possible implementation, before receiving the first information, the communication unit is configured to send a measurement result of a first reference signal, where the measurement result of the first reference signal indicates a reference signal received power (RSRP) of the first reference signal; both the first reference signal and the second reference signal correspond to a first TAG. The communication unit is further configured to receive random access indication information, where the random access indication information is used to instruct the terminal to initiate a random access procedure based on the random access configuration of the first reference signal. The TA in the random access response message is determined based on the random access preamble of the first reference signal, and the random access preamble of the first reference signal is determined based on the random access configuration of the first reference signal.

[0106] In a fourteenth aspect, the present application provides a communication device. The communication device may be a network device, a device of a network device, or a device capable of being used in conjunction with a network device. In one possible implementation, the communication device may include a functional module, which may be implemented as a hardware circuit, software, or a combination of hardware circuit and software.

[0107] In one possible implementation, the communication device includes a communication unit and a processing unit, wherein the communication unit is configured to send first information, the first information being configured to indicate a first TCI state, and the first TCI state corresponding to a first TAG.

[0108] In a possible implementation manner, the first information is further used to instruct the first device to initiate a random access process.

[0109] In a possible implementation, the communication unit is configured to send third indication information, where the third indication information is used to instruct the first device to initiate a random access process. The first information and the third indication information are in the same protocol data unit.

[0110] In one possible implementation, the communication unit is configured to send fourth indication information, the fourth indication information being configured to instruct the first device to transmit data based on the TA of the first TAG. The processing unit is configured to transmit an uplink signal or channel corresponding to the first TAG through the communication unit based on the TA of the first TAG.

[0111] In a possible implementation manner, the first information includes an identifier of the first TAG and / or a non-contention random access resource.

[0112] In one possible implementation, before sending the first information, the communication unit is configured to send second indication information, where the second indication information is used to indicate a second TCI state corresponding to the first TAG. The communication unit is further configured to transmit a signal or channel corresponding to the first TAG.

[0113] In one possible implementation, before sending the first information, the communication unit is configured to receive a measurement result of the first reference signal, where the measurement result of the first reference signal indicates the reference signal received power (RSRP) of the first reference signal. The processing unit is configured to determine a physical cell identifier corresponding to the second reference signal and a random access configuration of the first reference signal. The communication unit is further configured to send random access indication information, where the random access indication information is used to instruct the terminal to initiate a random access procedure based on the random access configuration of the first reference signal. The communication unit is further configured to receive a random access preamble of the first reference signal, where the random access preamble corresponds to a first TAG. The processing unit is further configured to determine a TA of the first TAG based on the random access preamble of the first reference signal.

[0114] For aspects 8 to 14, as an example, the processing unit may be a processor, and the communication unit may be a transceiver unit, a transceiver, or a communication interface. It is understood that when the communication device is a communication device (such as a terminal or a network device), the communication unit may be a transceiver in the communication device (for example, the transceiver includes a transmitter and a receiver), for example, implemented by an antenna, a feeder, and a codec in the communication device, or, if the communication device is a chip provided in the device, the processing unit may be a processing circuit, a logic circuit, etc. of the chip, and the communication unit may be an input / output interface of the chip, such as an input / output circuit, a pin, etc.

[0115] In a fifteenth aspect, the present application provides a communication device, comprising: a processor configured to execute instructions; optionally, the communication device further comprising a memory configured to store the instructions, wherein when the instructions are executed by the processor, the communication device implements the method of any possible implementation of any of the first to seventh aspects, and any of the first to seventh aspects. Optionally, the processor and the memory are coupled.

[0116] In the sixteenth aspect, the present application provides a communication system, which includes multiple devices or equipment in the above-mentioned aspects eight to fifteen, so that the devices or equipment execute the methods in any possible implementation of aspects one to seven, and aspects one to seven.

[0117] In the seventeenth aspect, the present application provides a computer-readable storage medium storing instructions, which, when the instructions are executed on a computer, enables the computer to execute the method in any possible implementation of the first to seventh aspects, and the first to seventh aspects.

[0118] In the eighteenth aspect, the present application provides a computer program product comprising instructions, which, when executed on a computer, enable the computer to execute the method of any possible implementation of aspects one to seven, and aspects one to seven.

[0119] In a nineteenth aspect, the present application provides a chip comprising a processor (or a logic circuit). Optionally, the chip may further comprise a communication interface (or interface) for implementing the method in any one of the possible implementations of the first to seventh aspects, and the first to seventh aspects. In one possible implementation, if the chip is the smallest processing unit in the entire machine, the chip may be a processor, or may comprise a processor and a memory, or may comprise a processor, a memory, and a transceiver, for implementing the method in any one of the possible implementations of the first to seventh aspects, and the first to seventh aspects.

[0120] In a twentieth aspect, the present application provides a chip system. The chip system includes a processor and an interface. Optionally, it may also include a memory for implementing the method in any possible implementation of the first to seventh aspects above, and any of the first to seventh aspects. The chip system may be composed of a chip, or may include a chip and other discrete devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0121] FIG1 is a schematic diagram of a communication system provided by the present application;

[0122] FIG2 is a flow chart of the first communication method provided by this application;

[0123] FIG3 is a schematic diagram of a first device provided by the present application not transmitting a signal or channel corresponding to a first TAG within a first time interval;

[0124] FIG4 is a flow chart of a second communication method provided in this application;

[0125] FIG5 is a flow chart of a third communication method provided by this application;

[0126] FIG6 is a schematic diagram of a communication device provided by the present application;

[0127] FIG7 is a schematic diagram of another communication device provided in this application. DETAILED DESCRIPTION

[0128] In the embodiments of this application, " / " can indicate that the associated objects are in an "or" relationship. For example, A / B can mean A or B. "And / or" can be used to describe the existence of three relationships between associated objects. For example, "A and / or B" can mean: A exists alone, A and B exists simultaneously, or B exists alone. A and B can be singular or plural. To facilitate the description of the technical solutions of the embodiments of this application, the words "first" and "second" may be used in the embodiments of this application to distinguish between technical features with the same or similar functions. The words "first" and "second" do not limit the quantity or order of execution, and the words "first" and "second" do not necessarily mean different. In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. The use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0129] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0130] In order to solve the problem of cell interference or data transmission failure caused by TA update when the terminal moves between multiple TRPs in the same cell, the present application provides a communication method and device, which can indicate the TA used by the terminal when moving between multiple TRPs in the same cell, avoid data transmission failure, and help reduce cell interference.

[0131] The communication method provided in this application can be applied to the communication system shown in Figure 1. For example, the communication system includes a network device and a terminal.

[0132] Among them, the communication system of the present application may include but is not limited to communication systems of various radio access technologies (RAT), for example, it may be: a narrowband Internet of Things system (NB-IoT), a long term evolution (LTE) communication system, or a 5G (or new radio (NR)) communication system, or a transition system between an LTE communication system and a 5G communication system, which may also be called a 4.5G communication system, and of course it may also be a future communication system, such as the sixth generation (6G) or even the seventh generation (7G) system. The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. It is known to those skilled in the art that with the evolution of the communication network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0133] Among them, a terminal, also known as a terminal device (terminal), user equipment (UE), mobile station (MS), mobile terminal (MT), etc., refers to a device that provides voice and / or data connectivity to users. For example, a handheld device with wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminals include: mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, drones, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control (industrial control), wireless terminals in self-driving (self-driving), wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety (transportation safety), wireless terminals in smart cities (smart cities), wireless terminals in smart homes (smart homes), terminals in 5G networks, terminals in future evolved networks, or terminals in future communication systems.

[0134] The network device of the present application refers to a radio access network (RAN) node (or device) that connects a terminal to a wireless network, and may also be referred to as a base station. For example, some examples of RAN nodes include: a gNB, a transmission reception point (TRP), an evolved Node B (eNB), a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., a home evolved NodeB, or a home Node B, HNB), a base band unit (BBU), or a wireless fidelity (Wifi) access point (AP), a satellite in a satellite communication system, a radio controller in a cloud radio access network (CRAN) scenario, a wearable device, a drone, or a device in an Internet of Vehicles (e.g., vehicle to everything (V2X)), or a communication device in device to device (D2D) communication.

[0135] In one possible implementation, the network device may include a centralized unit (CU) node, a distributed unit (DU) node, or a RAN device including a CU node and a DU node. The RAN device including the CU node and the DU node splits the protocol layer of the eNB in ​​the long term evolution (LTE) system, places the functions of some protocol layers in the CU for centralized control, and distributes the functions of the remaining part or all of the protocol layers in the DU, which is centrally controlled by the CU. In some deployments of network devices, the CU can also be divided into a CU-control plane (CP) and a CU-user plane (UP). In another possible implementation, the network device can also be an antenna unit (RU), etc. In another possible implementation, the network device can also be an open radio access network (ORAN) architecture, etc. This application does not limit the specific type of the network device. For example, when the network device is an ORAN architecture, the network device shown in the embodiment of the present application can be an access network device in the ORAN, or a module in the access network device, etc. In the ORAN system, CU can also be called an open centralized unit (open CU, O-CU), DU can also be called an open distributed unit (O-DU), CU-DU can also be called an open centralized unit-distributed unit (O-CU-DU), CU-UP can also be called an open centralized unit-control plane (O-CU-UP), and RU can also be called an open antenna unit (O-RU).

[0136] It should be noted that:

[0137] "Sending" and "receiving" in the embodiments of the present application indicate the direction of signal transmission. For example, "sending information to a terminal" can be understood as the destination end of the information being the terminal device, which can include direct sending through the air interface, and also includes indirect sending through the air interface by other units or modules. "Receiving information from a network device" can be understood as the source end of the information being the network device, which can include direct receiving from the network device through the air interface, and also includes indirect receiving from the network device through the air interface from other units or modules. "Sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface.

[0138] In other words, sending and receiving can be performed between devices, for example, between a network device and a terminal device, or can be performed within a device, for example, sending or receiving between components, modules, chips, software modules or hardware modules within the device through a bus, wiring or interface.

[0139] It is understandable that information may be processed between the source and destination of information transmission, such as coding, modulation, etc., but the destination can understand the valid information from the source. Similar expressions in this application can be understood similarly and will not be repeated.

[0140] In the embodiments of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain information (such as the indication information described below) is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein there is an association between the other information and the information to be indicated; it is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance, for example, the indication of specific information can be achieved with the help of the arrangement order of each information agreed in advance (such as predefined by the protocol), thereby reducing the indication overhead to a certain extent. The present application does not limit the specific method of indication. It is understandable that, for the sender of the indication information, the indication information can be used to indicate the information to be indicated, and for the receiver of the indication information, the indication information can be used to determine the information to be indicated.

[0141] 1. Relevant terms involved in this application:

[0142] 1. Multiple transmission and reception point (mTRP):

[0143] mTRP technology enables base stations (such as gNodeB in 5G) to use multiple TRPs to communicate with terminals (such as UEs). mTRP is designed to optimize network performance (for example, to achieve high speed and high reliability). Different TRPs have different geographical locations, and these TRPs all correspond to the same service cell. For example, the current terminal supports data transmission with up to 2 transmission and reception points TRPs, but more than or equal to 2 TRPs will be configured for the terminal. A TRP that is not performing data transmission is used as a candidate TRP for the terminal. If the terminal moves to the range of a candidate TRP, the access network device can quickly activate the candidate TRP to provide services to the terminal. For example, ways to quickly activate a TRP include activating or indicating a transmission configuration indicator state (TCI state). Specifically, if the TCI state indicated by the base station to the terminal belongs to one of the candidate TRPs, then this TRP will be activated and data transmission can be performed; otherwise, data transmission cannot be performed.

[0144] Before data transmission, the terminal must obtain the timing advance (TA), which corresponds to the TRP. Given the geographical locations of different TRPs, the TAs associated with the terminal and these TRPs are different. To allow the terminal to obtain the TAs for different TRPs, the network device triggers multiple random access procedures. Each random access procedure can only obtain a single TA.

[0145] The nouns involved in the above process include:

[0146] (1) TA: TA is used for UE uplink transmission. UEs can send uplink data in advance by a certain time (TA value) based on a timing advance command (TA command). The TA value depends on the signal propagation delay between the base station and the UE. UEs in different locations have different TA values.

[0147] (2) Timing Advance Command (TA Command, TAC): The TRP indicates the TA value by sending the TAC to the UE. For example, the random access response (RAR) message can convey the initial TAC; or the medium access control control element (MAC CE) message can convey the TAC.

[0148] (3) Timing Advance Group (TA group, TAG): Due to carrier aggregation, UEs are allowed to support different carriers and have different TA values, and the concept of TAG is introduced. For example, a TAG can include one or more TAs.

[0149] (4)TCI state: The UE can be configured with one or more TCI states.

[0150] 2. Random access process:

[0151] For example, the random access procedure triggered by the network device may include the following steps:

[0152] (1) The network device sends a physical downlink control channel (PDCCH) order to the terminal. The PDCCH is used by the network device to trigger the terminal to initiate random access, thereby achieving synchronization between the network device and the terminal.

[0153] (2) The terminal sends a random access preamble to the network device.

[0154] (3) The network device determines the timing advance TA based on the random access preamble.

[0155] (4) The terminal receives a random access response, which includes a TA.

[0156] (5) Random access completed.

[0157] 2. Communication method provided by this application:

[0158] Among them, multiple TCI states can correspond to the same TAG. For example, after the terminal initially accesses the service cell, the network device can send a configuration message to the terminal, and the configuration message includes configuration information of the first TCI state, the second TCI state, and the third TCI state. Specifically, the first TCI state and the second TCI state correspond to the first TAG, and the third TCI state corresponds to the second TAG. The first TAG and the second TAG are different TAGs, and the three TCI states are also different TCI states, and also correspond to different TRPs (different geographical locations). However, the three TCI states correspond to the same service cell. Among them, the configuration of the TCI state includes a reference signal and a TCI state type indication; optionally, the configuration of the TCI state can also include a physical cell identify (PCI) corresponding to the TCI state. For example, the first TCI state corresponds to a first reference signal (RS), the second TCI state corresponds to a second RS, and the third TCI state corresponds to a third RS. If the TCI state configuration includes a PCI, the TCI state is the TCI state of the neighboring cell, but can be used for the current serving cell. If the TCI state configuration does not include a PCI, the TCI state is the PCI corresponding to the current serving cell. The PCI corresponds to the random access configuration (for example, the first PCI corresponds to the first random access channel (RACH) configuration).

[0159] For example, Table 1 is a relationship table of configurations of multiple TCI states provided in this application.

[0160] Table 1: Relationship table of multiple TCI state configurations

[0161] Among them, the first TCI state and the second TCI state correspond to the first TAG, indicating that different TCI states can correspond to the same TAG. Among them, TRP1, TRP2 and TRP3 all belong to the same network device, for example, TRP1, TRP2 and TRP3 belong to the same base station. According to Table 1, it can also be deduced that different TRPs can correspond to the same TAG. Therefore, when the terminal moves between multiple TRPs and cell interference or data transmission failure occurs due to TA update, the communication method provided in the present application can use multiple methods to indicate TA, so that the terminal can determine the TA value, avoid data transmission failure, and help reduce cell interference.

[0162] 1. The first communication method provided by the present application, in which the network device indicates TA to the terminal through a random access response, and the terminal can immediately apply TA but stop the transmission of the corresponding signal or channel within the first time zone; or, the terminal can delay the application of TA.

[0163] For example, Figure 2 is a flow chart of the first communication method provided by this application. The method can be implemented by interaction between a first device and a second device, where the first device is, for example, a terminal or a device of a terminal, and the second device is, for example, a network device or a device of a network device. The method includes the following steps:

[0164] S101, a second device sends a configuration message to a first device, where the configuration message includes configuration information of a transmission configuration indication state TCI state; correspondingly, the first device receives the configuration message.

[0165] Multiple TCI states can correspond to the same TAG. For example, assuming that when a terminal initially accesses a serving cell, the network device may send a configuration message to the terminal. The configuration message includes configuration information for the first TCI state, the second TCI state, and the third TCI state. For details about the configuration information of these TCI states, refer to the description above and in Table 1, and are not repeated here.

[0166] Optionally, the TCI state configuration information may be carried in an RRC message. For example, the second device sends an RRC message to the first device, where the RRC message includes configuration information of the first TCI state, the second TCI state, and the third TCI state.

[0167] S102, the second device sends second indication information to the first device, where the second indication information is used to indicate a second transmission configuration indication state TCI state; correspondingly, the first device receives the second indication information.

[0168] For example, the second indication information includes an identifier of a second TCI state, which is used to initially indicate a second TCI state corresponding to the signal or channel. The second TCI state corresponds to the first TAG.

[0169] Among them, the signals or channels in the present application include uplink signals or channels, and / or downlink signals or channels. For example, the uplink channel includes one or more of the following: physical uplink shared channel (PUSCH (physical uplink shared channel) for configured grant transmission), PUSCH for dynamic grant transmission, physical uplink control channel (PUCCH) scheduling request (PUCCH SR), PUSCH channel state information (PUSCH channel state information, PUSCH CSI), PUCCH channel state information (PUCCH CSI), etc. The uplink signal mainly refers to the sounding reference signal (SRS). For another example, the downlink channel includes one or more of the following: physical downlink shared channel (PDSCH (physical downlink shared channe) SPS (semi-persistent scheduling)) for semi-persistent scheduling, dynamic PDSCH transmission, physical downlink control channel (PDCCH), etc. The downlink reference signal mainly refers to the channel state information reference signal (CSI-RS).

[0170] S103: The first device transmits a signal or channel corresponding to the first TAG based on the second indication information.

[0171] Transmission specifically refers to sending or receiving. For example, for uplink transmission, the first device transmits an uplink signal or channel corresponding to the first TAG to the second device. Alternatively, for downlink transmission, the first device receives a downlink signal or channel corresponding to the first TAG. As shown in Table 1, if the second TCI state corresponds to TRP2, the first device transmits the signal or channel corresponding to the first TAG to TRP2.

[0172] Optionally, before the first device receives the second indication information, the first device does not transmit the signal or channel corresponding to the first TAG. For example, for uplink transmission, before the first device receives the second indication information, the first device does not send the uplink signal or channel corresponding to the first TAG. Alternatively, for downlink transmission, the first device does not receive the downlink signal or channel corresponding to the first TAG.

[0173] Optionally, the second indication information may further include an identifier of a second TAG, where the second TAG is different from the first TAG. For example, when the second indication information further includes an identifier of the second TAG, for uplink transmission, the second device sends an uplink signal or channel corresponding to the second TAG; for downlink transmission, the second device receives a downlink signal or channel corresponding to the second TAG.

[0174] Optionally, the second indication information may further include an identifier of the first TAG. For example, when the second indication information includes the identifier of the first TAG, the first device may transmit a signal or channel corresponding to the first TAG. Alternatively, the second indication information may not include the identifier of the first TAG. The first device may obtain the first TAG corresponding to the second TCI state based on the identifier of the second TCI state in the second indication information and Table 1.

[0175] S104. The first device sends a measurement result of the first reference signal to the second device, where the measurement result of the first reference signal indicates a reference signal received power RSRP of the first reference signal. Correspondingly, the second device receives the measurement result of the first reference signal.

[0176] For example, after the first device initially accesses the serving cell, the second indication information is used to initially indicate a second TCI state corresponding to the signal or channel. The second TCI state corresponds to the first TAG, and the second TCI state corresponds to the second RS. The first device can continuously measure the RS and obtain a measurement result of the first RS; the measurement result of the first RS indicates the RSRP of the first RS.

[0177] S105: The second device determines to trigger the first device to initiate a random access process based on the measurement result of the first reference signal.

[0178] For example, the second device determines to trigger the first device to initiate a random access procedure for the first PCI (e.g., initiate a RACH corresponding to the first PCI) based on the measurement result of the first RS (the RSRP of the first RS) and the first RS corresponding to the first PCI. The second device needs to determine the first PCI based on the first RS, thereby determining the RACH corresponding to the first PCI. For example, the second device can determine that the first RS corresponds to the first PCI and that the first PCI corresponds to RACH configuration 1 based on the correspondence in Table 1.

[0179] S106, the second device sends random access indication information to the first device; correspondingly, the first device receives the random access indication information.

[0180] The random access indication information is used to instruct the terminal to initiate a random access process based on the random access configuration of the first reference signal. For example, the random access indication information is a PDCCH order.

[0181] S107, the first device sends a random access preamble to the second device based on the random access indication information; correspondingly, the second device receives the random access preamble.

[0182] The random access preamble corresponds to the first TAG and also corresponds to the PCI of the first RS. For example, the random access preamble is determined based on RACH configuration 1 corresponding to the first PCI. The first device sends the preamble corresponding to the first TAG to the second device.

[0183] S108: The second device determines the timing advance TA of the first timing advance group TAG based on the random access preamble.

[0184] For example, the second device determines the TA of the first TAG based on the preamble corresponding to the first TAG.

[0185] S109 , the second device sends a random access response to the first device, where the random access response includes the timing advance TA of the first timing advance group TAG; correspondingly, the first device receives the random access response.

[0186] For example, the random access response includes a TA value, and the TA corresponds to the first TAG, corresponds to TRP1, and corresponds to TRP2.

[0187] Optionally, the random access response further includes an identifier of the first TAG, indicating that the TA corresponds to the first TAG.

[0188] The operations performed by the first device after receiving the random access response may include the following two examples:

[0189] Example 1: The terminal immediately applies the TA in the random access response, but does not transmit the signal or channel corresponding to the first TAG until the first indication information is received. For example, Example 1 specifically includes the following steps:

[0190] S110a: The first device does not transmit a signal or channel corresponding to the first TAG.

[0191] Based on the aforementioned S105-S109 in which the first device re-initiates the random access process to the second device, it can be known that the first device moves in the same serving cell, from TRP2 to TRP1, and therefore needs to activate TRP1, and update and apply TA.

[0192] For example, the first device can immediately apply the TA of the first TAG, but since TRP2 and TRP1 both correspond to the first TAG, in order to avoid the first device using the TA to transmit data to the TRP (such as TRP2) connected before the movement, this application limits the first device from transmitting the signal or channel corresponding to the first TAG until a new TCI state indication is received, and then transmitting data.

[0193] In one possible implementation, when the first indication information is not received, the first device does not transmit the signal or channel corresponding to the first TAG. For example, when the first indication information is not received, the first device performs one or more of the following operations:

[0194] (1) Assuming that the signal or channel corresponds to the first resource, and the first resource corresponds to the first TAG, the first device does not send an uplink signal or channel through the first resource, or does not receive a downlink signal or channel on the first resource.

[0195] For example, assuming that the first resource is a resource corresponding to an uplink signal or an uplink channel, the first device stops (drops) sending an uplink signal or an uplink channel to the second device on the first resource, and the uplink signal or the uplink channel corresponds to the second TCI state (first TAG). For another example, assuming that the first resource is a resource corresponding to a downlink signal or a downlink channel, the first device stops (drops) receiving a downlink signal or a downlink channel from the second device on the first resource, and the downlink signal or the downlink channel corresponds to the second TCI state (first TAG). For the description of the uplink signal or the uplink channel, and the downlink signal or the downlink channel, refer to the corresponding description in S102 and will not be repeated here.

[0196] (2) If a second resource exists, the first device transmits a signal or channel through the second resource, wherein the second resource corresponds to a second TAG, and the second TAG is different from the first TAG.

[0197] For example, assuming that the second resource is a resource corresponding to an uplink signal or an uplink channel, and the second resource corresponds to the second TAG (third TCI state), the first device can send an uplink signal or an uplink channel to the second device on the second resource without being affected. For another example, assuming that the second resource is a resource corresponding to a downlink signal or a downlink channel, the first device can receive a downlink signal or a downlink channel from the second device on the second resource, and the downlink signal or downlink channel corresponds to the third TCI state (second TAG) and is not affected. That is, this application only limits the signal or channel on the first resource corresponding to the first TAG to not being transmitted, and the transmission of signals or channels on the second resources corresponding to other TAGs will not be affected.

[0198] Optionally, if the first device has not received the first indication information, the first device will not transmit the signal or channel corresponding to the first TAG until the first device receives the first indication information.

[0199] In one possible implementation, after the first device receives the random access response and before receiving the first indication information, the first device does not transmit the signal or channel corresponding to the first TAG. The first indication information is a new TCIstate indication. The time interval after the first device receives the random access response and before receiving the first indication information can be called the first time interval, and the first device does not transmit the signal or channel corresponding to the first TAG within the first time interval. Not transmitting specifically means not sending or not receiving. For example, in the first time interval, the first device performs one or more of the following operations:

[0200] (1) In a first time interval, assuming that a signal or channel corresponds to a first resource, and the first resource corresponds to a first TAG, the first device does not send an uplink signal or channel through the first resource, or does not receive a downlink signal or channel on the first resource.

[0201] For example, assuming that the first resource is a resource corresponding to an uplink signal or an uplink channel, the first device stops (drops) sending an uplink signal or an uplink channel to the second device on the first resource, and the uplink signal or the uplink channel corresponds to the second TCI state (first TAG). For another example, assuming that the first resource is a resource corresponding to a downlink signal or a downlink channel, the first device stops (drops) receiving a downlink signal or a downlink channel from the second device on the first resource, and the downlink signal or the downlink channel corresponds to the second TCI state (first TAG). For the description of the uplink signal or the uplink channel, and the downlink signal or the downlink channel, refer to the corresponding description in S102 and will not be repeated here.

[0202] For example, FIG3 is a schematic diagram of a first device provided by the present application not transmitting a signal or channel corresponding to a first TAG within a first time interval. After receiving a random access response RAR, the first device will not transmit (also referred to as stop) an uplink signal or uplink channel, or will not transmit a downlink signal or downlink channel, until it receives first indication information (indicating a first TCI state), and then retransmit (also referred to as resume transmission) the uplink signal or uplink channel, or retransmit the downlink signal or downlink channel.

[0203] (2) During a first time interval, if a second resource exists, the first device transmits a signal or channel through the second resource, wherein the second resource corresponds to a second TAG that is different from the first TAG.

[0204] For example, assuming that the second resource is a resource corresponding to an uplink signal or an uplink channel, and the second resource corresponds to the second TAG (third TCI state), the first device can send an uplink signal or an uplink channel to the second device on the second resource without being affected. For another example, assuming that the second resource is a resource corresponding to a downlink signal or a downlink channel, the first device can receive a downlink signal or a downlink channel from the second device on the second resource, and the downlink signal or downlink channel corresponds to the third TCI state (second TAG) and is not affected. That is, this application only limits the signal or channel on the first resource corresponding to the first TAG to not being transmitted, and the transmission of signals or channels on the second resources corresponding to other TAGs will not be affected.

[0205] Example 2: The terminal delays applying the TA in the random access response, for example, applying the TA after receiving the first indication information. For example, Example 2 specifically includes the following steps:

[0206] S110b, the first device applies TA after receiving the first indication information.

[0207] For example, after the first device receives a random access response and obtains the TA, it may not apply the TA first, but wait until it receives the first TCI state indication, and then apply the TA, thereby avoiding data transmission errors. For example, assuming that when the first device initially accesses the service cell, it performs data transmission with the second TRP based on the second TCI state indicated by the second indication information. When the first device moves to the first TRP, it can obtain the RSRP of the first RS and determine subsequent data transmission with the first TRP based on the RSRP of the first RS. The first device stops data transmission with the second TRP. After receiving the first indication information, the first device applies the TA of the first TAG and performs data transmission with the first TRP, which can avoid data transmission errors.

[0208] Optionally, before applying the TA, the first device may transmit a signal or channel corresponding to the first TAG according to the second TCI state in the second indication information.

[0209] Optionally, the above-mentioned S110a and S110b are different operations performed by the first device after receiving the random access response, and can be regarded as two parallel solutions, and the first device chooses to perform one of them. For example, if the first device chooses to perform S110a, S110b is not performed; if the first device chooses to perform S110b, S110a is not performed.

[0210] S111, the second device sends first indication information to the first device, where the first indication information is used to indicate a first transmission configuration indication state TCI state; correspondingly, the first device receives the first indication information.

[0211] For example, the first indication information includes an identifier of a first TCI state, used to indicate the first TCI state. The first indication information is used to update the TCI state corresponding to the signal or channel. For example, the second indication information in S102 is used to indicate that the signal or channel corresponds to the second TCI state in the initial state. The first indication information is used to update the signal or channel to the first TCI state, thereby activating TRP1 corresponding to the first TCI state.

[0212] S112. The first device transmits a signal or channel corresponding to the first TAG based on the first indication information.

[0213] After receiving the first indication information, the first device may transmit a signal or channel corresponding to the first TCI state (first TAG). For example, for uplink transmission, after receiving the first indication information, the first device may transmit an uplink signal or channel to the second device on a third resource, where the third resource corresponds to the first TCI state and the first TAG. For another example, for downlink transmission, after receiving the first indication information, the first device may receive a downlink signal or channel via the third resource.

[0214] In a possible implementation, S112 specifically includes the following process:

[0215] After receiving the random access response, the first device applies the TA of the first TAG;

[0216] After receiving the first indication information, the first device sends an uplink signal or channel corresponding to the first TAG based on the TA.

[0217] For example, the first device sends an uplink signal or uplink channel corresponding to the first TAG (first TCI state) based on the TA. The description of the uplink signal or uplink channel and the downlink signal or downlink channel in this step can refer to the description corresponding to S102 and will not be repeated here.

[0218] In this embodiment, when a terminal moves between multiple transmission and reception points (TRPs) corresponding to the same TAG, the first device may not transmit the signal or channel corresponding to the TAG indicated by the random access response, or may delay the application of the TA corresponding to the TAG, thereby avoiding data transmission failure. After the first device receives a TCI state indication, the first device then transmits the signal or channel corresponding to the TAG based on the TCI state indication, which helps reduce cell interference.

[0219] 2. The second communication method provided by the present application, in which the network device indicates TA to the terminal through TCI indication and TA command.

[0220] For example, Figure 4 is a flow chart of the second communication method provided in this application. The method can be implemented by interaction between a first device and a second device, where the first device is, for example, a terminal or a device of a terminal, and the second device is, for example, a network device or a device of a network device. The method includes the following steps:

[0221] S201: The second device sends a configuration message to the first device, where the configuration message includes configuration information of a transmission configuration indication state TCI state; correspondingly, the first device receives the configuration message.

[0222] S202: The second device sends second indication information to the first device, where the second indication information is used to indicate a second transmission configuration indication state TCI state; correspondingly, the first device receives the second indication information.

[0223] S203: The first device transmits a signal or channel corresponding to the first TAG based on the second indication information.

[0224] S204. The first apparatus sends a measurement result of the first reference signal to the second apparatus, where the measurement result of the first reference signal indicates a reference signal received power RSRP of the first reference signal. Correspondingly, the second apparatus receives the measurement result of the first reference signal.

[0225] S205: The second device determines to trigger the first device to initiate a random access process based on the measurement result of the first reference signal.

[0226] S206, the second device sends random access indication information to the first device; correspondingly, the first device receives the random access indication information.

[0227] S207, the first device sends a random access preamble to the second device based on the random access indication information; correspondingly, the second device receives the random access preamble.

[0228] S208: The second device determines the timing advance TA of the first timing advance group TAG based on the random access preamble.

[0229] Among them, the specific implementation method of the above S201-S208 can refer to the corresponding description in S101-S108, which will not be repeated here.

[0230] S209, the second device sends first indication information and a timing advance TA command to the first device; correspondingly, the first device receives the first indication information and the TA command.

[0231] The first indication information is used to indicate a first TCI state, and the first TCI state corresponds to a first TAG.

[0232] The TA command (TA command, also called TAC) includes the TA of the first TAG. For example, the TA command includes a TA value, and the first TAG shares this TA value.

[0233] The first indication information and the TA command are in the same protocol data unit (PDU). For example, the first TCI state indication and the TA command are in the same MAC PDU. This embodiment differs from the embodiment in FIG. 2 in that the first TCI state indication and the TA command are sent in the same MAC PDU. Therefore, this embodiment does not send a random access response, but only sends the first indication information and the TA command.

[0234] Optionally, after the first device receives the random response, the first device does not need to stop (drop) transmission of the signal or channel.

[0235] S210, the first device applies TA.

[0236] For example, after receiving the first indication information and the TA command, the first device applies the TA of the first TAG in the TA command.

[0237] S211, the first device transmits a signal or channel corresponding to the first TAG based on the first indication information.

[0238] For example, after the first device receives the first indication information, it can transmit the signal or channel corresponding to the first TCI state (first TAG). For example, for uplink transmission, after the first device receives the first indication information and the TA command, it sends an uplink signal or an uplink channel to the second device on the third resource, and the third resource corresponds to the first TCI state and also corresponds to the first TAG. For another example, for downlink transmission, after the first device receives the first indication information and the TA command, it receives a downlink signal or a downlink channel through the third resource. The description of the uplink signal or uplink channel and the downlink signal or downlink channel in this step can refer to the corresponding description of S102 and will not be repeated here.

[0239] In this embodiment, when a terminal moves between multiple transmission and reception points (TRPs) corresponding to the same TAG, the first device can receive a first TCI state indication and a TA command after re-initiating a random access procedure, and the first TCI state indication and the TA command are in the same protocol data unit. Therefore, the first device does not use the TA to transmit signals or channels to the TRP to which it was connected before the movement, which helps reduce cell interference.

[0240] 3. The third communication method provided by the present application, in which the network device adds indication information in the MAC CE to instruct the terminal to stop the TAT corresponding to the TAG and apply the corresponding TA after receiving the TCI state indication.

[0241] For example, Figure 5 is a flowchart of the third communication method provided by this application. The method can be implemented by interaction between a first device and a second device, where the first device is, for example, a terminal or a device of a terminal, and the second device is, for example, a network device or a device of a network device. The method includes the following steps:

[0242] S301, the second device sends a configuration message to the first device, where the configuration message includes configuration information of a transmission configuration indication state TCI state; correspondingly, the first device receives the configuration message.

[0243] S302, the second device sends second indication information to the first device, where the second indication information is used to indicate a second transmission configuration indication state TCI state; correspondingly, the first device receives the second indication information.

[0244] S303: The first device transmits a signal or channel corresponding to the first TAG based on the second indication information.

[0245] S304. The first apparatus sends a measurement result of the first reference signal to the second apparatus, where the measurement result of the first reference signal indicates a reference signal received power RSRP of the first reference signal. Correspondingly, the second apparatus receives the measurement result of the first reference signal.

[0246] S305: The second device determines to trigger the first device to initiate a random access process based on the measurement result of the first reference signal.

[0247] Among them, the specific implementation method of the above S301-S305 can refer to the corresponding description in S101-S105, which will not be repeated here.

[0248] S306: The second device sends first information to the first device, where the first information is used to indicate a first transmission configuration indication state TCI state; correspondingly, the first device receives the first information.

[0249] For example, the first information includes an identifier of a first TCI state, which is used to update the TCI state corresponding to the signal or channel. The first TCI state corresponds to the first TAG. For example, the first information is in a MAC CE.

[0250] In one possible implementation, the second device instructs the first device to initiate a random access process through the first information. For example, the first information is also used to instruct the first device to initiate a random access process.

[0251] In another possible implementation, the second device instructs the first device to initiate a random access procedure via third indication information, but the third indication information and the first indication information are in the same protocol data unit. For example, the second device sends third indication information to the first device, where the third indication information is used to instruct the first device to initiate a random access procedure; the first information and the third indication information are in the same MAC PDU.

[0252] Optionally, the first information includes a non-contention random access resource. The non-contention access resource is used by the first device to initiate a random access process. For example, the non-contention access resource is a random access resource of the first device, and the first device can send a random access preamble to the second device on the non-contention access resource.

[0253] In one possible implementation, the second device sends fourth indication information to the first device, where the fourth indication information is used to instruct the first device to perform data transmission based on the TA of the first TAG; in response, the first device receives the fourth indication information. For example, the second device instructs the first device, through the fourth indication information, to continue using the TA of the first TAG for data transmission, and the first information does not instruct the first device to initiate a random access procedure. Therefore, in this implementation, the first device does not need to re-initiate a random access procedure.

[0254] Optionally, the first information includes an identifier of the first TAG. Alternatively, the first information may not include an identifier of the first TAG, and the first device may determine that the second TCI state corresponds to the first TAG based on Table 1 and the second TCI state.

[0255] S307: The first device stops the timing advance timer TAT of the first TAG based on the first information.

[0256] For example, the first information is used to instruct the first device to initiate a random access process. After receiving the first information, the first device stops the TAT of the first TAG and initiates the random access process. The stop in S307 means that the first device has previously received a TA command (for example, the first device may have received a TA command in S302 and S303), and the first device starts the TAT of the first TAG (that is, the TAT of the first TAG is in a running state). Then, based on the first information, the first device stops the TAT of the first TAG. After the TAT stops, the first device will stop sending the uplink data corresponding to the first TAG. If the second TAG is in operation, it will not be affected.

[0257] Prior to S307, the first device receives TAT ​​configuration information and activates the TAT configuration information. The first device receives a TA command and, based on the TA command, starts the timing advance timer for the first TAG. For example, in S301, the first device receives a configuration message that also includes TAT ​​configuration information. Alternatively, the first device may receive TAT configuration information separately. For example, before S302 or S303, the first device receives a second message that includes TAT ​​configuration information.

[0258] Optionally, TAT is in the running state, which means that once TAT is started, it is in the running state until TAT stops or TAT times out. When TAT is in the running state, TA is valid; when TAT stops or TAT times out, TA is invalid.

[0259] Optionally, the first information further includes fifth indication information, where the fifth indication information is used to instruct the first device to stop the TAT of the first TAG.

[0260] Optionally, the first information instructs the first apparatus to initiate a random access procedure, or, after S307, the PDCCH command instructs the first apparatus to initiate a random access procedure, and the first apparatus may further perform the following steps:

[0261] (1) The first device sends a random access preamble to the second device according to the first information; in response, the second device receives the random access preamble. The random access preamble corresponds to the first TAG and also corresponds to the PCI of the first RS.

[0262] Optionally, if the first information includes a non-contention random access resource, the first device may send a random access preamble to the second device on the non-contention random access resource indicated by the first information. Otherwise, the first device selects a random access resource on its own and initiates a random access procedure to access the second device.

[0263] (2) The second device determines the TA of the first TAG according to the random access preamble.

[0264] (3) The second device sends a random access response to the first device, where the random access response includes the TA of the first TAG. The TA corresponds to the first TAG and also corresponds to TRP1. Optionally, the random access response also includes an identifier of the first TAG.

[0265] Optionally, when the second device sends fourth indication information to the first device, where the fourth indication information is used to instruct the first device to continue using the TA of the first TAG for data transmission, the first device may not perform the above-mentioned random access process and directly perform S308.

[0266] S308: The first device transmits a signal or channel corresponding to the first TAG based on the first information.

[0267] For example, after receiving the first information, the first device may transmit a signal or channel corresponding to the first TCI state (first TAG). For example, for uplink transmission, the first device sends an uplink signal or an uplink channel to the second device based on the first TCI state and the TA. For another example, for downlink transmission, the first device receives a downlink signal or a downlink channel based on the first TCI state. The description of the uplink signal or uplink channel and the downlink signal or downlink channel in this step can be referred to the corresponding description of S102 and will not be repeated here.

[0268] In this embodiment, when the terminal moves between multiple transmission and reception points TRPs and the multiple TRPs correspond to the same TAG, the base station adds new indication information in the MAC CE to indicate the TCI state, thereby instructing the first device to stop the TAT of the TAG, which is beneficial to reducing cell interference.

[0269] In order to realize the various functions in the method provided by the present application, the device or equipment provided by the present application may include a hardware structure and / or a software module, and realize the above-mentioned various functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether a certain function among the above-mentioned functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution. The division of modules in the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, the various functional modules in the various embodiments of the present application can be integrated into a processor, or they can exist physically separately, or two or more modules can be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software functional modules.

[0270] Figure 6 is a schematic diagram of a communication device provided by the present application. The device may include a module corresponding to each of the methods / operations / steps / actions described in any of the embodiments shown in Figures 2 to 5. The module may be implemented as a hardware circuit, software, or a combination of hardware circuits and software.

[0271] The apparatus 600 includes a communication unit 601 and a processing unit 602, which are used to implement the methods executed by the devices in the above embodiments. The communication unit 601 is also called a transceiver unit, which includes a sending unit and a receiving unit. The sending unit is used to send signals, and the receiving unit is used to receive signals.

[0272] In one possible implementation, the device is a terminal or a device of a terminal or a chip of a terminal. Specifically, the communication unit 601 and the processing unit 602 are used to implement the method performed by the first device in the foregoing method embodiment, and the related description, which will not be repeated here. In the communication method implemented by the device, when the terminal moves between multiple transmission and reception points TRP, and multiple TRPs correspond to the same TAG, the first device may not transmit the signal or channel corresponding to the TAG indicated by the random access response, thereby avoiding data transmission errors. Until the first device receives the TCI state indication, the first device transmits the signal or channel corresponding to the TAG based on the TCI state indication, which is conducive to reducing cell interference.

[0273] In one possible implementation, the device is a base station or a device of a base station or a chip of a base station. Specifically, the communication unit 601 and the processing unit 602 are used to implement the method performed by the second device in the foregoing method embodiment, and the related description, which will not be repeated here. In the communication method implemented by the device, when the terminal moves between multiple transmission and reception points TRP, and multiple TRPs correspond to the same TAG, the second device can suspend sending or receiving the signal or channel corresponding to the first TAG, and indicate the TA of the first TAG to the first device, so that the first device can choose to apply the TA immediately or delay the application of the TA, which is beneficial to reduce cell interference.

[0274] In one possible implementation, when the communication device is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit may be an input / output circuit or a communication interface; the processing unit may be a processor, microprocessor, integrated circuit, or logic circuit integrated on the chip.

[0275] The present application also provides a communication device, as shown in Figure 7, which is another structural diagram of the communication device according to an embodiment of the present application. The communication device can be used to execute the steps performed by the first device or the second device in the above method embodiment, and reference can be made to the relevant descriptions in the above method embodiment.

[0276] The communication device includes a processor 701. Optionally, the communication device further includes a memory 702 and a transceiver 703.

[0277] In a possible implementation, the processor 701 , the memory 702 , and the transceiver 703 are connected via buses, and computer instructions are stored in the memory.

[0278] Optionally, the processing unit 602 in the aforementioned embodiment may specifically be the processor 701 in this embodiment, so the specific implementation of the processor 701 is not repeated. The communication unit 601 in the aforementioned embodiment may specifically be the transceiver 703 in this embodiment, so the specific implementation of the transceiver 703 is not repeated.

[0279] In this application, a processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic block diagrams disclosed in this application. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in this application may be directly executed by a hardware processor, or by a combination of hardware and software modules within the processor.

[0280] In the present application, the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or a volatile memory, such as a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory in the present application may also be a circuit or any other device that can implement a storage function, for storing program instructions and / or data.

[0281] The present application provides another communication device, which includes a processor and an interface. Optionally, it also includes a memory, the processor is coupled to the memory, and the processor is used to read and execute computer instructions stored in the memory to implement the communication method in the embodiments shown in Figures 2 to 5.

[0282] The present application also provides a communication system including a first device and a second device. The first device is configured to execute all or part of the steps executed by the first device in the above embodiment. The second device is configured to execute all or part of the steps executed by the second device in the above embodiment.

[0283] The present application provides a computer-readable storage medium. The computer-readable storage medium stores a program or instruction. When the program or instruction is executed on a computer, the computer executes the communication method in the embodiments shown in Figures 2 to 5.

[0284] The present application provides a computer program product. The computer program product includes instructions. When the instructions are executed on a computer, the computer executes the communication method in the embodiments shown in Figures 2 to 5.

[0285] The present application provides a chip or chip system, which includes at least one processor and an interface, the interface and the at least one processor are interconnected by lines, and the at least one processor is used to run computer programs or instructions to execute the communication method in the embodiments shown in Figures 2 to 5.

[0286] The interface in the chip may be an input / output interface, a pin, or a circuit.

[0287] The chip system may be a system on chip (SOC) or a baseband chip, wherein the baseband chip may include a processor, a channel encoder, a digital signal processor, a modem, an interface module, and the like.

[0288] In one implementation, the chip or chip system described above in this application further includes at least one memory, in which instructions are stored. The memory may be a storage unit within the chip, such as a register, a cache, etc., or a storage unit of the chip (e.g., a read-only memory, a random access memory, etc.).

[0289] The technical solutions provided in this application can be implemented in whole or in part through software, hardware, firmware, or any combination thereof. When implemented using software, they can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in this application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a terminal, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium.

[0290] In this application, under the premise that there is no logical contradiction, the various embodiments may reference each other, for example, the methods and / or terms between method embodiments may reference each other, for example, the functions and / or terms between device embodiments may reference each other, for example, the functions and / or terms between device embodiments and method embodiments may reference each other.

[0291] Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: include: receiving a random access response, where the random access response includes a timing advance TA of a first timing advance group TAG; Not transmitting the signal or channel corresponding to the first TAG; receiving first indication information, where the first indication information is used to indicate a first transmission configuration indication state TCI state, where the first TCI state corresponds to the first TAG; The signal or channel corresponding to the first TAG is transmitted based on the first indication information.

2. The method according to claim 1, characterized in that The not transmitting the signal or channel corresponding to the first TAG includes: When the first indication information is not received, the signal or channel corresponding to the first TAG is not transmitted.

3. The method according to claim 2, characterized in that The signal or channel corresponds to a first resource; the first resource corresponds to the first TAG; The not transmitting the signal or channel corresponding to the first TAG includes: not sending an uplink signal or channel through the first resource; Alternatively, no downlink signal or channel is received on the first resource.

4. The method according to claim 3, characterized in that The method further comprises: If a second resource exists, a signal or a channel is transmitted through the second resource; wherein the second resource corresponds to a second TAG, and the second TAG is different from the first TAG.

5. The method according to claim 1, characterized in that The transmitting the signal or channel corresponding to the first TAG based on the first indication information includes: After receiving the random access response, applying the TA of the first TAG; After receiving the first indication information, an uplink signal or channel corresponding to the first TAG is sent based on the TA.

6. The method according to claim 1, characterized in that Before receiving the random access response, the method further includes: receiving second indication information, where the second indication information is used to indicate a second TCI state, where the second TCI state corresponds to the first TAG; The signal or channel corresponding to the first TAG is transmitted based on the second indication information.

7. A communication method, characterized in that: include: receiving first indication information and a TA command, wherein the first indication information is used to indicate a first TCI state, the first TCI state corresponds to a first TAG, and the TA command includes a TA of the first TAG; The first indication information and the TA command are in the same protocol data unit; Apply the TA.

8. The method according to claim 7, characterized in that Applying the TA includes: After receiving the first indication information and the TA command, the TA is applied.

9. The method according to claim 7 or 8, characterized in that: The method further comprises: Based on the TA, an uplink signal or channel corresponding to the first TAG is sent.

10. A communication method, characterized in that: include: receiving first information, where the first information is used to indicate a first TCI state, where the first TCI state corresponds to a first TAG; Based on the first information, stop the timing advance timer TAT of the first TAG.

11. The method according to claim 10, characterized in that The first information is also used to instruct the first device to initiate a random access process.

12. The method according to claim 10, characterized in that After receiving the first information, the method further includes: Receive third indication information, where the third indication information is used to instruct the first device to initiate a random access process; the first information and the third indication information are in the same protocol data unit.

13. The method according to claim 10, characterized in that The method further comprises: receiving fourth indication information, where the fourth indication information is used to instruct the first device to perform data transmission based on a TA of the first TAG; Based on the TA of the first TAG, an uplink signal or channel corresponding to the first TAG is transmitted.

14. The method according to any one of claims 10 to 12, characterized in that: The first information includes an identifier of the first TAG and / or a non-contention random access resource.

15. A communication device, characterized in that: The method comprises a communication unit and a processing unit, wherein the communication unit and the processing unit are used to execute the method according to any one of claims 1 to 14.

16. A communication device, characterized in that: include: A processor and a memory, wherein the memory is used to store instructions, and when the instructions are executed by the processor, the communication device executes the method according to any one of claims 1 to 14.

17. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed on a computer, the computer is caused to perform the method according to any one of claims 1 to 14.

18. A computer program product, characterized in that The method comprises instructions which, when executed on a computer, cause the computer to execute the method according to any one of claims 1 to 14.

19. A chip, characterized in that: The chip includes a processor, or the chip includes a processor and an interface; the processor is used to execute a computer program, so that the chip implements the method according to any one of claims 1 to 14.

20. A chip system, characterized in that: The chip system comprises a processor and an interface, wherein the processor is configured to execute a computer program so that the chip system implements the method as claimed in any one of claims 1 to 14.

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