Beam indication method and device

Abstract

Disclosed in an embodiment of the present disclosure are a beam indication method and device, the method comprising: a network device sending beam indication information to a terminal device, the beam indication information comprising one or more transmission configuration indication states (TCI SATs) and / or TCI State IDs, the one or more TCI SATs being used for indicating beams used on a first resource, and / or the TCI SATs ID being used for indicating beams used on the first resource; the one or more TCI SATs comprise a TCI State which is not configured by the first resource, the TCI State corresponding to the TCI State ID is used for indicating a beam used on the first resource, and the TCI State corresponding to the TCI State ID comprises a TCI State which is not configured by the first resource; and the network device sends and / or receives data based on the target beam corresponding to the beam indication information. By implementing the embodiment of the invention, the resource overhead is saved, the resource waste is avoided, and the time delay of beam indication is optimized.

Description

A beam indication method and device thereof Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a beam indication method and device thereof. Background Art

[0002] In the related art, the beam indication in NR (New Radio) is generally through the three-level indication method of RRC (Radio Resource Control)-MAC (Medium Access Control) CE (Control Element)-DCI (Downlink Control Information), where the beam information is indicated by the TCI (Transmission Configuration Indicator) state. For example, taking the PDSCH (Physical Downlink Share Channel) beam indication as an example, RRC will configure up to 128 TCI States for the terminal device, and then MAC CE will activate up to 8 TCI States to map to the 3-bit TCI information field in the DCI.

[0003] However, if the channel conditions change or the terminal device moves, the currently configured TCI State list needs to be updated. The network device needs to reconfigure the TCI State list, the latency cannot be guaranteed, and a large amount of resource overhead is also incurred for beam indication and beam measurement.

[0004] Summary of the Invention

[0005] The embodiments of the present disclosure provide a beam indication method and apparatus thereof, which can be applied to the Internet of Vehicles, such as vehicle to everything (V2X) communication, long-term evolution-vehicle (LTE-V) communication, vehicle to vehicle (V2V) communication, etc., or can be used in the fields of intelligent driving and intelligent connected vehicles. By indicating the beams of its own resources or other resources through the beam information of the current resources, beam indication across resources (such as BWP or cell) can be achieved, thereby saving resource overhead, avoiding resource waste, and optimizing the delay of beam indication.

[0006] In a first aspect, an embodiment of the present disclosure provides a beam indication method, the method being performed by a network device, the method including:

[0007] Sending beam indication information to the terminal device, the beam indication information including one or more transmission configuration indication states TCI State and / or transmission configuration indication state identifier TCI State ID, the one or more TCI States are used to indicate the beam used on the first resource, the one or more TCI States include a TCI State not configured by the first resource itself, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes a TCI State not configured by the first resource itself;

[0008] Data is sent and / or received based on the target beam corresponding to the beam indication information.

[0009] In this technical solution, the beam information of the current resource is used to indicate the beam of non-self (such as other resources except its own resources), so that beam indication across resources (such as BWP or cell) can be realized, thereby saving resource overhead, avoiding resource waste, and optimizing the delay of beam indication.

[0010] In a second aspect, an embodiment of the present disclosure provides another beam indication method, which is performed by a network device and includes:

[0011] Determining that a speed of the terminal device changes from a first speed to a second speed, wherein the first speed is lower than a first speed threshold, the second speed is higher than a second speed threshold, and the first speed threshold is less than or equal to the second speed threshold;

[0012] Sending beam indication information to the terminal device, the beam indication information including one or more transmission configuration indication states TCI State and / or transmission configuration indication state identifier TCI State ID, the one or more first TCI States are used to indicate the beam used on the first resource, the one or more first TCI States include the TCI State configured by the second resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the second resource, wherein the beam corresponding to the TCIState in the TCI State set of the first resource is a narrow beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a wide beam;

[0013] Data is sent and / or received based on the target beam corresponding to the beam indication information.

[0014] In this technical solution, the working resource of the terminal device is the first resource, and the beam of the first resource is a narrow beam. When the terminal device changes from a first speed to a second speed (such as from a stationary state to a moving state, such as fast movement), the beam of the first resource can be indicated by the beam information of the second resource, that is, the narrow beam of the first resource can be indicated by the beam information of the second resource corresponding to the wide beam, so that the terminal device can generate the target beam of the first resource based on the beam information of the second resource, thereby realizing beam indication across resources (such as BWP or cell), thereby saving resource overhead, avoiding resource waste, and optimizing the delay of beam indication.

[0015] In a third aspect, an embodiment of the present disclosure provides another beam indication method, which is performed by a network device and includes:

[0016] Determining that a speed of the terminal device changes from a second speed to a first speed, wherein the first speed is lower than a first speed threshold, the second speed is higher than a second speed threshold, and the first speed threshold is less than or equal to the second speed threshold;

[0017] Sending first beam indication information to the terminal device, the first beam indication information including one or more first transmission configuration indication states TCI State and / or transmission configuration indication state identifier TCI State ID, the one or more first TCI States are used to indicate the beam used on the first resource, the one or more first TCI States include the TCI State configured by the second resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the second resource, wherein the beam corresponding to the TCIState in the TCI State set of the first resource is a wide beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a narrow beam;

[0018] Data is sent and / or received based on the target beam corresponding to the first beam indication information.

[0019] In this technical solution, the working resource of the terminal device is the first resource, and the beam of the first resource is a wide beam. When the terminal device changes from the second speed to the first speed (such as from a mobile state to a stationary state), the beam of the second resource can be indicated by the beam information of the first resource, that is, the wide beam of the second resource can be indicated by the beam information of the first resource corresponding to the narrow beam, so that the terminal device can generate the target beam of the second resource based on the beam information of the first resource, thereby realizing beam indication across resources (such as BWP or cell), thereby saving resource overhead, avoiding resource waste, and optimizing the delay of beam indication.

[0020] In a fourth aspect, an embodiment of the present disclosure provides another beam indication method, which is performed by a network device and includes:

[0021] Determining that the terminal device needs to perform beam switching according to downlink channel conditions;

[0022] Sending beam indication information to the terminal device, the beam indication information including one or more transmission configuration indication states TCI State and / or transmission configuration indication state identifier TCI State ID, the one or more TCI States are used to indicate the beam used on the first resource, the one or more TCI States include the TCI State configured by the second resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the second resource;

[0023] Data is sent and / or received based on the target beam corresponding to the beam indication information.

[0024] In this technical solution, when it is determined that the terminal device needs to perform beam switching based on the downlink channel conditions, the beam information of the current resource can be used to indicate a beam other than its own (such as other resources other than its own resources), and beam indication across resources (such as BWP or cell) can be achieved, thereby saving resource overhead, avoiding resource waste, and optimizing the delay of beam indication.

[0025] In a fifth aspect, an embodiment of the present disclosure provides another beam indication method, which is performed by a terminal device and includes:

[0026] Receive beam indication information sent by a network device, where the beam indication information includes one or more transmission configuration indication states TCI States and / or transmission configuration indication state identifiers TCI State IDs, where the one or more TCI States are used to indicate a beam used on a first resource, where the one or more TCI States include a TCI State that is not configured by the first resource itself, and where the TCI State corresponding to the TCI State ID is used to indicate a beam used on the first resource, and where the TCI State corresponding to the TCI State ID includes a TCI State ID that is not configured by the first resource itself;

[0027] Data is sent and / or received based on the target beam corresponding to the beam indication information.

[0028] In this technical solution, the beam information of the current resource is used to indicate the beams of other resources, so that beam indication across resources (such as BWP or cell) can be achieved, thereby saving resource overhead, avoiding resource waste, and optimizing the delay of beam indication.

[0029] In a sixth aspect, an embodiment of the present disclosure further provides a beam indication method, which is performed by a network device and includes:

[0030] Sending beam indication information to the terminal device, where the beam indication information is used to select one or more TCI States from the configuration information or the TCI State set of the second resource, where the one or more TCI States are used to indicate the beam used on the first resource, and the one or more TCI States include TCI States not configured for the first resource itself. The configuration information is information configured by the network device for the terminal device, and the configuration information includes at least the TCI State set of the second resource;

[0031] Data is sent and / or received based on the target beam corresponding to the beam indication information.

[0032] In a seventh aspect, an embodiment of the present disclosure provides a communication device having the function of implementing some or all of the functions of the network device in the method described in the first aspect above. For example, the functions of the communication device may have the functions of some or all of the embodiments of the present disclosure, or may have the function of implementing any one of the embodiments of the present disclosure alone. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0033] In one implementation, the communication device may include a transceiver module and a processing module, wherein the processing module is configured to support the communication device in performing the corresponding functions of the above-mentioned method. The transceiver module is used to support communication between the communication device and other devices. The communication device may also include a storage module, which is coupled to the transceiver module and the processing module and stores computer programs and data necessary for the communication device.

[0034] As an example, the processing module may be a processor, the transceiver module may be a transceiver or a communication interface, and the storage module may be a memory.

[0035] In an eighth aspect, an embodiment of the present disclosure provides a communication device having the function of implementing some or all of the functions of the network device in the method described in the second aspect above. For example, the functions of the communication device may have the functions of some or all of the embodiments of the present disclosure, or may have the function of implementing any one of the embodiments of the present disclosure alone. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0036] In one implementation, the communication device may include a transceiver module and a processing module, wherein the processing module is configured to support the communication device in performing the corresponding functions of the above-mentioned method. The transceiver module is used to support communication between the communication device and other devices. The communication device may also include a storage module, which is coupled to the transceiver module and the processing module and stores computer programs and data necessary for the communication device.

[0037] In a ninth aspect, an embodiment of the present disclosure provides a communication device having the function of implementing some or all of the functions of the network device in the method described in the third aspect above. For example, the functions of the communication device may have the functions of some or all of the embodiments of the present disclosure, or may have the function of implementing any one of the embodiments of the present disclosure alone. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0038] In one implementation, the communication device may include a transceiver module and a processing module, wherein the processing module is configured to support the communication device in performing the corresponding functions of the above-mentioned method. The transceiver module is used to support communication between the communication device and other devices. The communication device may also include a storage module, which is coupled to the transceiver module and the processing module and stores computer programs and data necessary for the communication device.

[0039] In a tenth aspect, an embodiment of the present disclosure provides a communication device having the function of implementing some or all of the functions of the network device in the method described in the fourth aspect above. For example, the functions of the communication device may have the functions of some or all of the embodiments of the present disclosure, or may have the function of implementing any one of the embodiments of the present disclosure alone. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0040] In one implementation, the communication device may include a transceiver module and a processing module, wherein the processing module is configured to support the communication device in performing the corresponding functions of the above-mentioned method. The transceiver module is used to support communication between the communication device and other devices. The communication device may also include a storage module, which is coupled to the transceiver module and the processing module and stores computer programs and data necessary for the communication device.

[0041] In an eleventh aspect, an embodiment of the present disclosure provides another communication device that has some or all of the functions of the terminal device in the method example described in the fifth aspect above. For example, the functions of the communication device may have some or all of the functions in the embodiments of the present disclosure, or may have the functions of implementing any one of the embodiments of the present disclosure separately. The functions may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0042] In one implementation, the communication device may include a transceiver module and a processing module, the processing module being configured to support the communication device in performing the corresponding functions of the above-described method. The transceiver module is configured to support communication between the communication device and other devices. The communication device may also include a storage module, coupled to the transceiver module and the processing module, which stores computer programs and data necessary for the communication device.

[0043] In a twelfth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor. When the processor calls a computer program in a memory, it executes the method described in the first aspect above.

[0044] In a thirteenth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor. When the processor calls a computer program in a memory, it executes the method described in the second aspect above.

[0045] In a fourteenth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor. When the processor calls a computer program in a memory, it executes the method described in the third aspect above.

[0046] In a fifteenth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor. When the processor calls a computer program in a memory, it executes the method described in the fourth aspect.

[0047] In a sixteenth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor. When the processor calls a computer program in a memory, it executes the method described in the fifth aspect above.

[0048] In the seventeenth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the first aspect above.

[0049] In the eighteenth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the second aspect above.

[0050] In the nineteenth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the third aspect above.

[0051] In the twentieth aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the fourth aspect above.

[0052] In aspect 21, an embodiment of the present disclosure provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in aspect 5 above.

[0053] In aspect 22, an embodiment of the present disclosure provides a communication device, which includes a processor and an interface circuit, wherein the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in aspect 1 above.

[0054] In the twenty-third aspect, an embodiment of the present disclosure provides a communication device, which includes a processor and an interface circuit, wherein the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in the second aspect above.

[0055] In aspect 24, an embodiment of the present disclosure provides a communication device, which includes a processor and an interface circuit, wherein the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in aspect 3 above.

[0056] In aspect 25, an embodiment of the present disclosure provides a communication device, which includes a processor and an interface circuit, wherein the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in aspect 4 above.

[0057] In aspect 26, an embodiment of the present disclosure provides a communication device, which includes a processor and an interface circuit, wherein the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in aspect 5 above.

[0058] In aspect 27, an embodiment of the present disclosure provides a beam indication system, the system including the communication device described in aspect 6 and the communication device described in aspect 7, or the system including the communication device described in aspect 8 and the communication device described in aspect 9, or the system including the communication device described in aspect 13 and the communication device described in aspect 14, or the system including the communication device described in aspect 18 and the communication device described in aspect 19.

[0059] In aspect 28, an embodiment of the present disclosure provides a computer-readable storage medium for storing instructions for the above-mentioned network device, and when the instructions are executed, the network device executes the method described in aspect 1 above.

[0060] In the twenty-ninth aspect, an embodiment of the present disclosure provides a computer-readable storage medium for storing instructions used by the above-mentioned network device. When the instructions are executed, the network device executes the method described in the second aspect.

[0061] In the thirtieth aspect, an embodiment of the present disclosure provides a computer-readable storage medium for storing instructions for the above-mentioned network device, and when the instructions are executed, the network device executes the method described in the third aspect.

[0062] In the thirty-first aspect, an embodiment of the present disclosure provides a computer-readable storage medium for storing instructions used by the above-mentioned network device, and when the instructions are executed, the network device executes the method described in the fourth aspect.

[0063] In aspect 32, an embodiment of the present disclosure provides a readable storage medium for storing instructions for the above-mentioned terminal device, and when the instructions are executed, the terminal device executes the method described in aspect 5 above.

[0064] In a thirty-third aspect, the present disclosure further provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in the first aspect above.

[0065] In aspect 34, the present disclosure further provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in aspect 2 above.

[0066] In aspect 35, the present disclosure further provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in aspect 3 above.

[0067] In aspect 36, the present disclosure further provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in aspect 4 above.

[0068] In aspect 37, the present disclosure further provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in aspect 5 above.

[0069] In aspect 38, the present disclosure provides a computer program which, when executed on a computer, enables the computer to execute the method described in aspect 1 above.

[0070] In aspect 39, the present disclosure provides a computer program which, when executed on a computer, enables the computer to execute the method described in aspect 2 above.

[0071] In the fortieth aspect, the present disclosure provides a computer program which, when executed on a computer, enables the computer to execute the method described in the third aspect above.

[0072] In the forty-first aspect, the present disclosure provides a computer program which, when executed on a computer, enables the computer to execute the method described in the fourth aspect.

[0073] In aspect 42, the present disclosure provides a computer program which, when executed on a computer, enables the computer to execute the method described in aspect 5 above. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the background technology, the drawings required for use in the embodiments of the present disclosure or the background technology will be described below.

[0075] FIG1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure;

[0076] FIG2 is a schematic flow chart of a beam indication method provided by an embodiment of the present disclosure;

[0077] FIG3 is a schematic flow chart of another beam indication method provided by an embodiment of the present disclosure;

[0078] FIG4 is a schematic flow chart of another beam indication method provided in an embodiment of the present disclosure;

[0079] FIG5 is a schematic diagram of a flow chart of another beam indication method provided by an embodiment of the present disclosure;

[0080] FIG6 is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure;

[0081] FIG7 is a schematic structural diagram of another communication device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0082] The embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and are not to be construed as limitations on the present disclosure. In the description of the present disclosure, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships can exist, for example, A and / or B can mean: the existence of A alone, the existence of A and B at the same time, and the existence of B alone.

[0083] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The singular forms "a", "an" and "the" used in the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0084] It should be understood that although the terms first, second, third, etc. may be used to describe various information in the embodiments of the present disclosure, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the embodiments of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0085] The embodiments of the present disclosure are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be understood as limiting the present disclosure.

[0086] With the continuous development of wireless communications, the demand for communication capabilities is becoming increasingly stringent. For future applications such as AR (Augmented Reality) / VR (Virtual Reality), the Internet of Vehicles, and the Internet of Things, ultra-high-speed, ultra-low-latency, and ultra-high-bandwidth communications will become the norm. To meet these requirements, a growing number of new technologies are being proposed.

[0087] Terahertz (THz) is a potential key technology for 6G (the sixth-generation mobile communications standard, also known as sixth-generation mobile communication technology) and is the most likely candidate for inclusion in the 6G standard. Terahertz communication is considered a key air interface technology candidate for achieving 6G Tbps / s communication speeds, with potential applications in holographic communications, micro-scale communications, ultra-high-capacity data backhaul, and short-distance ultra-high-speed transmission. Furthermore, leveraging THz's ultra-wide bandwidth and high-resolution resolution for high-precision positioning and high-resolution imaging of networks and / or terminal devices is a promising area for expanding THz communication applications.

[0088] However, the terahertz frequency band is relatively high. If MIMO (multiple input, multiple output) beamforming is used, the beams become extremely narrow, and the coverage range and angle of a single beam are very small. Therefore, a large number of beams are required to cover a cell or area, potentially thousands of beams. As a result, frequent beam switching and beam indication are inevitable as users move around.

[0089] In the related art, the beam indication in NR (New Radio) is generally through the three-level indication method of RRC (Radio Resource Control)-MAC (Medium Access Control) CE (Control Element)-DCI (Downlink Control Information), where the beam information is indicated by the TCI (Transmission Configuration Indicator) state. For example, taking the PDSCH (Physical Downlink Share Channel) beam indication as an example, the TCI State list in the MAC CE is shown in Table 1 below. RRC will configure up to 128 TCI States for the terminal device, and then MAC CE will activate up to 8 TCI States to map to the 3-bit TCI information field in the DCI.

[0090] Table 1 takes PDSCH beam indication as an example, TCI state list in MAC CE

[0091] It is understandable that each element in the above-mentioned Table 1 exists independently, and these elements are exemplarily listed in the same table, but it does not mean that all elements in the table must exist at the same time as shown in the table. The value of each element is independent of the value of any other element in Table 1. Therefore, those skilled in the art will understand that the value of each element in Table 1 is an independent embodiment. It should be noted that the embodiments of the present disclosure include multiple tables, and each of the tables is similar to Table 1, which is a combination of multiple independent embodiments in the same table, and each element in these tables should also be considered as an independent embodiment.

[0092] For a BWP's beam indication, the corresponding beam information in the TCI state list only indicates the beam for the current BWP resource. If channel conditions change or the terminal moves, the existing TCI state list needs to be updated, requiring reconfiguration of the TCI state list. This compromises latency and results in significant resource overhead for beam indication and measurement.

[0093] Based on the above problems, the embodiments of the present disclosure provide a beam indication method and device thereof, which can realize beam indication across resources (such as BWP or cell), solve the problem of high resource overhead for beam indication and beam measurement in related technologies, and also solve the delay problem.

[0094] In order to better understand the beam indication method disclosed in an embodiment of the present disclosure, the communication system to which the embodiment of the present disclosure is applicable is first described below.

[0095] Please refer to Figure 1, which is a schematic diagram of the architecture of a communication system provided in an embodiment of the present disclosure. The communication system may include, but is not limited to, one network device and one terminal device. The number and configuration of devices shown in Figure 1 are for example purposes only and do not constitute a limitation on the embodiments of the present disclosure. In actual applications, two or more network devices and two or more terminal devices may be included. The communication system shown in Figure 1 includes, for example, one network device 101 and one terminal device 102.

[0096] It should be noted that the technical solutions of the embodiments of the present disclosure can be applied to various communication systems, such as long-term evolution (LTE) systems, fifth-generation (5G) mobile communication systems, 5G new radio (NR) systems, or other future new mobile communication systems.

[0097] The network device 101 in the embodiment of the present disclosure is an entity on the network side for transmitting or receiving signals. For example, the network device 101 can be an evolved NodeB (eNB), a transmission reception point (TRP), a next generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (WiFi) system. The embodiment of the present disclosure does not limit the specific technology and specific device form adopted by the network device. The network device provided in the embodiment of the present disclosure can be composed of a centralized unit (CU) and a distributed unit (DU), wherein the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the network device, such as the base station, and the functions of some protocol layers are placed in the CU for centralized control, and the functions of the remaining part or all of the protocol layers are distributed in the DU, and the DU is centrally controlled by the CU.

[0098] The terminal device 102 in the embodiment of the present disclosure is an entity on the user side for receiving or transmitting signals, such as a mobile phone. The terminal device can also be called a terminal device (terminal), user equipment (UE), mobile station (MS), mobile terminal device (MT), etc. The terminal device can be a car with communication function, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self-driving (self-driving), a wireless terminal device in remote medical surgery, a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), etc. The embodiment of the present disclosure does not limit the specific technology and specific device form adopted by the terminal device.

[0099] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution provided by the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided by the embodiment of the present disclosure is also applicable to similar technical problems.

[0100] The beam indication method and device provided by the present disclosure are described in detail below with reference to the accompanying drawings.

[0101] Please refer to Figure 2, which is a flowchart of a beam indication method provided by an embodiment of the present disclosure. It should be noted that the method can be executed by a network device, that is, the method can be described from the network device side. As shown in Figure 2, the method may include but is not limited to the following steps:

[0102] In step 201, beam indication information is sent to the terminal device.

[0103] Optionally, when the channel conditions change or the terminal device moves and it is determined that the terminal device needs to perform beam switching, the network device can send beam indication information to the terminal device, instructing the terminal device to use the corresponding target beam to send and / or receive data through the beam indication information.

[0104] In an embodiment of the present disclosure, the beam indication information may include one or more TCI States and / or TCI State IDs (transmission configuration indication state identifiers), and the one or more TCI States may be used to indicate the beam used on the first resource, and the one or more TCI States include the TCI State configured by the non-first resource itself, and the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the non-first resource itself. Each TCI State can be used to indicate beam information, one TCI State corresponds to one beam, and has a corresponding reference signal. As an example, the TCI State configured by the non-first resource itself may be the TCI State configured by the second resource, and the TCI State configured by the second resource is derived from the TCI State set of resources configured by the network device for the terminal device.

[0105] In one implementation, the one or more TCI States may include a TCI State configured by a first resource. As an example, the one or more TCI States may be a TCI State configured by a resource other than the first resource itself. Optionally, the one or more TCI States may be a TCI State configured by a second resource. The TCI State configured by the second resource is derived from a TCI State set of resources configured by the network device for the terminal device.

[0106] In one implementation, the TCI State corresponding to the TCI State ID may include the TCI State configured by the second resource. As an example, the TCI State corresponding to the TCI State ID may be a TCI State configured by a non-first resource itself. Optionally, the TCI State corresponding to the TCI State ID may be a TCI State configured by the second resource. The TCI State configured by the second resource is derived from a TCI State set of resources configured by the network device for the terminal device.

[0107] Optionally, in one implementation, when the beam indication information includes a plurality of TCI States, the plurality of TCI States may include the TCI State configured by the second resource and the TCI State configured by the first resource. When the beam indication information includes a plurality of TCI State IDs, the TCI States corresponding to the plurality of TCI State IDs may include the TCI State configured by the second resource and the TCI State configured by the first resource.

[0108] In an embodiment of the present disclosure, the first resource may be one or more activated resources, and the second resource may be one or more resources other than the first resource. The activated resource may be a resource where data is transmitted. For example, the first resource may be a resource with service transmission, and the second resource may be a resource without service transmission. In one implementation, the resource may be a BWP or a cell. As an example of a possible implementation, the first resource may be a first cell, and the second resource may be a second cell; alternatively, the first resource may be a first BWP, and the second resource may be a second BWP.

[0109] In one possible implementation, when the first resource may be a first cell and the second resource may be a second cell, the first cell may be one or more activated cells, and the second cell may be one or more cells other than the first cell. The activated cell may be a cell where data is transmitted. For example, the first cell may be a cell with service transmission, and the second cell may be a cell without service transmission.

[0110] In one possible implementation, when the first resource is a first BWP and the second resource is a second BWP, the first BWP may be one or more active BWPs, and the second BWP may be one or more BWPs other than the first BWP. The active BWP may be a BWP where data is transmitted. For example, the first BWP may be a BWP with service transmission, and the second BWP may be a BWP without service transmission. Optionally, the first BWP and the second BWP may belong to the same cell, or they may belong to different cells.

[0111] In some embodiments of the present disclosure, the beam indication information may include, but is not limited to, at least one of the following information: a resource identifier and a TCI State identifier. The resource identifier may indicate the first resource; the TCI State identifier may indicate the TCI State corresponding to the beam indication information. One TCI State corresponds to one TCI State identifier. The one or more TCI States included in the beam indication information are not the TCI States configured for the first resource itself. As an example, the one or more TCI States included in the beam indication information may be the TCI State configured for the second resource. In one possible implementation, the resource identifier may be a BWP identifier and / or a cell identifier.

[0112] In one implementation, the beam indication information may include a BWP identifier and a TCI State identifier, wherein the BWP identifier may indicate the first BWP, and the TCI State identifier may indicate the TCI State corresponding to the beam indication information, and one TCI State corresponds to one TCI State identifier. As an example, relative to the first BWP (i.e., the BWP where data is transmitted), the BWP indicated by the TCI State belongs to the same cell as the first BWP. The BWP identifier may be the identifier of the first BWP (such as one or more activated BWPs), or may also be the identifier of the second BWP (i.e., one or more BWPs other than the first BWP). In this way, through this signaling, it is possible to indicate the beam of the first BWP or the beam of the second BWP through the beam information of the current BWP, and it is possible to implement beam indication across BWPs or within the BWP itself.

[0113] In another implementation, the beam indication information may include a cell identifier and the TCI State identifier. The cell identifier may indicate other cells outside the serving cell of the terminal device, and the TCI State identifier may indicate the TCI State corresponding to the beam indication information, with one TCI State corresponding to one TCI State identifier. In this way, through this signaling, it is possible to indicate the beam of the first cell or the beam of the second cell through the beam information of the current cell, thereby realizing beam indication across cells or within the own cell.

[0114] In another implementation, the beam indication information may include a cell identifier, the BWP identifier, and the TCI State identifier. The cell identifier may indicate other cells outside the service cell of the terminal device, the BWP identifier may indicate the first BWP, and the TCI State identifier may indicate the TCI State corresponding to the beam indication information, and one TCI State corresponds to one TCI State identifier. As an example, relative to the first BWP (i.e., the BWP where data is transmitted), the BWP indicated by the TCI State belongs to a different cell from the first BWP. In this way, through this signaling, it is possible to indicate the beam of the first cell or the beam of the second cell through the beam information of the current cell, and to realize beam indication across cells or the cell itself.

[0115] Optionally, in some embodiments of the present disclosure, the beam indication information may be carried by at least one of the following methods: RRC signaling; MAC CE command; DCI signaling.

[0116] In this embodiment, the beam indication information may be carried by RRC signaling. That is, the beam indication information may be indicated by RRC signaling.

[0117] In this embodiment, the beam indication information may be carried by MAC CE signaling. That is, the beam indication information may be indicated by MAC CE signaling.

[0118] In this embodiment, the beam indication information may be carried by DCI signaling. That is, the beam indication information may be indicated by DCI signaling.

[0119] In this embodiment, the BWP identifier in the beam indication information can be carried by RRC signaling, and the TCI state identifier can be carried by DCI signaling. For example, when the terminal device moves slowly (such as in a stationary or quasi-static state), the BWP identifier in the beam indication information can be carried by RRC signaling, and the TCI state identifier can be carried by DCI signaling.

[0120] In this embodiment, the cell identifier in the beam indication information can be carried by RRC signaling, and the TCI state identifier can be carried by DCI signaling. For example, when the terminal device moves slowly (such as in a stationary or quasi-static state), the cell identifier in the beam indication information can be carried by RRC signaling, and the TCI state identifier can be carried by DCI signaling.

[0121] In this embodiment, the cell identifier in the beam indication information can be carried through RRC signaling, the BWP identifier can be carried through MAC CE signaling, and the TCI status identifier can be carried through DCI signaling.

[0122] It should be noted that the above-mentioned embodiments for beam indication information are not exhaustive, but are only illustrations of some embodiments, and the above-mentioned embodiments can be implemented individually or in combination. The above-mentioned embodiments are only for illustration and are not intended to be a specific limitation on the scope of protection of the embodiments of the present disclosure.

[0123] In some embodiments of the present disclosure, the beam corresponding to the TCI State in the TCI State set of the first resource is a narrow beam, and the beam corresponding to the TCI State in the TCI State set of the second resource is a wide beam. In this way, the simultaneous activation of beams of multiple widths can be achieved. It can be understood that the angle between the two half-power points (i.e., 3dB gain points) of the beam can indicate the width of the beam, wherein the larger the angle, the wider the beam, and the smaller the angle, the narrower the beam. The wide beam may refer to the angle between the two half-power points (i.e., 3dB gain points) of the beam being greater than or equal to the angle threshold. For example, if the angle between the two half-power points (i.e., 3dB gain points) of the beam is less than the angle threshold, the beam can be called a narrow beam. In this way, the beam of the first resource can be indicated by the beam information of the second resource (i.e., the beam information of the wide beam), that is, the narrow beam can be indicated by the beam information of the wide beam resource, thereby realizing beam indication across resources.

[0124] In some embodiments of the present disclosure, the beam corresponding to the TCI State in the TCI State set of the first resource is a wide beam, and the beam corresponding to the TCI State in the TCI State set of the second resource is a narrow beam. In this way, the beam information of the second resource (i.e., the beam information of the narrow beam) can be used to indicate the beam of the first resource, that is, the beam information of the narrow beam resource is used to indicate the wide beam, thereby achieving cross-resource beam indication.

[0125] In step 202, data is sent and / or received based on the target beam corresponding to the beam indication information.

[0126] In an embodiment of the present disclosure, the network device may send and / or receive data based on the target beam corresponding to the beam indication information.

[0127] In one possible implementation, the beam indicated by the beam indication information is a downlink beam, and the network device can send data based on the target downlink transmit beam corresponding to the beam indication information. As an example, the data can be PDSCH data, and the network device can use the target downlink transmit beam corresponding to the beam indication information to send PDSCH data. It should be noted that the data can also be other types of data, which is not specifically limited in this disclosure and will not be elaborated on. It is worth noting that the beam indication in the embodiment of the present disclosure mainly provides an implementation method for beam indication for downlink transmit beams and downlink receive beams. The beam indication scheme for uplink receive beams and uplink transmit beams can refer to the processing of downlink beams in this disclosure. This disclosure does not specifically limit this and will not elaborate on it.

[0128] It should be noted that, since the TCI State in the beam indication information can indicate the beam used on the first resource, the TCI State includes the TCI State configured by the non-first resource itself, so that beam switching can be performed through the beam indication information. That is to say, in one implementation method, the beam indication information involved in the embodiments of the present disclosure can achieve the purpose of beam switching. The network device sends the beam indication information to the terminal device to implement the beam switching function. It enables the terminal device to use the beam of other BWPs or other cells without switching BWPs or cells, thereby improving the flexibility of the beam.

[0129] In the embodiment of the present disclosure, beam information of the current resource is used to indicate the beams of other resources, so that beam indication across resources (such as BWP or cell) can be achieved, thereby saving resource overhead, avoiding resource waste, and optimizing the delay of beam indication.

[0130] Optionally, the network device can configure a plurality of (such as at least two) resource TCI State sets for the terminal device, so that the network device can activate the TCI State in the TCI State set of the plurality of resources for mapping to the TCI information field in the DCI. Specifically, please refer to Figure 3, which is a flow chart of another beam indication method provided by an embodiment of the present disclosure. It should be noted that the method can be executed by the network device, that is, the method can be described from the network device side. As shown in Figure 3, the method may include but is not limited to the following steps:

[0131] In step 301, configuration information is sent to the terminal device.

[0132] In an embodiment of the present disclosure, the configuration information includes a TCI state set for the first resource and a TCI state set for the second resource. The TCI state set for the first resource includes one or more TCI states, and the TCI state set for the second resource includes one or more TCI states. Each TCI state corresponds to one beam. As an example, using the PDSCH beam indication as an example, the TCI state list for the first BWP and the second BWP in the MAC CE may be shown in Table 2 below.

[0133] Table 2 takes PDSCH beam indication as an example, and lists the TCI state of the first BWP and the second BWP in the MAC CE. The BWP ID in the table is the first BWP, and BWP ID0-BWP ID3 are the second BWP. The second BWP can be one or more.

[0134] In one implementation, the resource may be a beamwidth resource (BWP) or a cell. As an example, a network device may send configuration information to a terminal device. The configuration information may include a TCI State set for a first BWP and a TCI State set for a second BWP. The TCI State set for the first BWP includes one or more TCI State sets, and the TCI State set for the second BWP includes one or more TCI States. Each TCI State corresponds to one beam. The first BWP and the second BWP may belong to the same cell or different cells. A TCI State may be used to indicate beam information. One TCI State corresponds to one beam, and each TCI State may include a corresponding reference signal.

[0135] As another example, a network device may send configuration information to a terminal device, where the configuration information may include a TCI State set of a first cell and a TCI State set of a second cell, where the TCI State set of the first cell includes one or more TCI States, and the TCI State set of the second cell includes one or more TCI States, where one TCI State corresponds to one beam. The TCI State may be used to indicate beam information, where one TCI State corresponds to one beam, and each TCI State may include a corresponding reference signal.

[0136] In one possible implementation, the configuration information may be carried via RRC signaling. As an example, the network device may send the configuration information to the terminal device via RRC signaling. For example, during an RRC connection establishment, RRC connection reestablishment, or RRC connection reconfiguration process, the network device may send the configuration information to the terminal device via RRC signaling. Optionally, the configuration information may also be carried via other signaling, which is not limited in this disclosure and will not be described in detail.

[0137] In step 302, beam indication information is sent to the terminal device.

[0138] Optionally, when the channel conditions change or the terminal device moves and it is determined that the terminal device needs to perform beam switching, the network device can send beam indication information to the terminal device, instructing the terminal device to use the corresponding target beam to send and / or receive data through the beam indication information.

[0139] In an embodiment of the present disclosure, the beam indication information may include one or more TCI States and / or TCI State IDs, and the one or more TCI States may be used to indicate the beam used on the first resource, and the one or more TCI States include the TCI State configured by the non-first resource itself, and the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the non-first resource itself. Each TCI State can be used to indicate beam information, one TCI State corresponds to one beam, and has a corresponding reference signal. As an example, the TCI State configured by the non-first resource itself may be the TCI State configured by the second resource, and the TCI State configured by the second resource is derived from the TCI State set of resources configured by the network device for the terminal device.

[0140] In one implementation, the one or more TCI States may include a TCI State configured by a first resource. As an example, the one or more TCI States may be a TCI State configured by a resource other than the first resource itself. Optionally, the one or more TCI States may be a TCI State configured by a second resource. The TCI State configured by the second resource is derived from a TCI State set of resources configured by the network device for the terminal device.

[0141] In one implementation, the TCI State corresponding to the TCI State ID may include the TCI State configured by the second resource. As an example, the TCI State corresponding to the TCI State ID may be a TCI State configured by a non-first resource itself. Optionally, the TCI State corresponding to the TCI State ID may be a TCI State configured by the second resource. The TCI State configured by the second resource is derived from a TCI State set of resources configured by the network device for the terminal device.

[0142] Optionally, in one implementation, when the beam indication information includes a plurality of TCI States, the plurality of TCI States may include the TCI State configured by the second resource and the TCI State configured by the first resource. When the beam indication information includes a plurality of TCI State IDs, the TCI States corresponding to the plurality of TCI State IDs may include the TCI State configured by the second resource and the TCI State configured by the first resource.

[0143] Optionally, in one implementation, the beam indication information can only indicate the TCI State included in the configuration information.

[0144] In a possible implementation, the TCI State in the beam indication information can only be selected from the TCI State included in the configuration information.

[0145] In an embodiment of the present disclosure, the first resource may be one or more activated resources, and the second resource may be one or more resources other than the first resource. The activated resource may be a resource where data is transmitted. For example, the first resource may be a resource with service transmission, and the second resource may be a resource without service transmission. In one implementation, the resource may be a BWP or a cell. As an example of a possible implementation, the first resource may be a first cell, and the second resource may be a second cell; alternatively, the first resource may be a first BWP, and the second resource may be a second BWP.

[0146] In one possible implementation, when the first resource may be a first cell and the second resource may be a second cell, the first cell may be one or more activated cells, and the second cell may be one or more cells other than the first cell. The activated cell may be a cell where data is transmitted. For example, the first cell may be a cell with service transmission, and the second cell may be a cell without service transmission.

[0147] In one possible implementation, when the first resource is a first BWP and the second resource is a second BWP, the first BWP may be one or more active BWPs, and the second BWP may be one or more BWPs other than the first BWP. The active BWP may be a BWP where data is transmitted. For example, the first BWP may be a BWP with service transmission, and the second BWP may be a BWP without service transmission. Optionally, the first BWP and the second BWP may belong to the same cell, or they may belong to different cells.

[0148] It should be noted that, in the embodiments of the present disclosure, a resource can be mapped to only one TCI State set. In one implementation, the TCI State used by a resource in the first resource is derived from the TCI State set configured by another resource in the first resource other than the resource. That is, the TCI State used by a certain resource in the first resource can be derived from the TCI State set configured by another resource other than the certain resource. As an example, taking the resource as a BWP and the first resource as the first BWP as an example, the TCI State used by a certain BWP in the first BWP can be derived from the TCI State set configured by another BWP other than the certain BWP. For example, the first BWP includes 2 activated BWPs (such as BWP1 and BWP2), the beam indication information can indicate BWP1 in the first BWP, and the TCI State of BWP1 in the first BWP can be derived from the TCI State set configured by the BWP2 (that is, the TCI State set of the BWP2 included in the configuration information). As another example, taking the resource as a cell and the first resource as the first cell, the TCI State used by a cell in the first cell may be derived from the TCI State set configured by another cell other than the cell. For example, the first cell includes two activated cells (such as cell 1 and cell 2), and the beam indication information may indicate cell 1 in the first cell. The TCI State of cell 1 in the first cell may be derived from the TCI State set configured by cell 2 (that is, the TCI State set of cell 2 included in the configuration information).

[0149] In another implementation, the TCI State used by a resource in the first resource is derived from the TCI State set configured by a resource in the second resource. That is, the TCI State used by a resource in the first resource is derived from the TCI State set configured by a resource in the second resource. As an example, taking the resource as a BWP, the first resource as a first BWP, and the second resource as a second BWP as an example, the TCI State used by a BWP in the first BWP may be derived from the TCI State set configured by a BWP in the second BWP. For example, the first BWP includes two activated BWPs (such as BWP1 and BWP2), and the second BWP includes BWP3 and BWP4. The beam indication information may indicate BWP1 in the first BWP, and the TCI State of BWP1 in the first BWP may be derived from the TCI State set configured by BWP3 (that is, the TCI State set of BWP3 included in the configuration information). As another example, taking the resource as a cell and the first resource as the first cell, the TCI State used by a cell in the first cell may be derived from the TCI State set configured by another cell other than the cell. For example, the first cell includes two activated cells (such as cell 1 and cell 2), and the second cell includes cell 3 and cell 4. The beam indication information may indicate cell 1 in the first cell, and the TCI State of cell 1 in the first cell may be derived from the TCI State set configured by cell 4 (that is, the TCI State set of cell 4 included in the configuration information).

[0150] It should be noted that, in an embodiment of the present disclosure, multiple resources can be mapped together to one TCI State set. In one implementation, the TCI State used by two or more resources in the first resource is derived from the TCI State set configured by a resource in the first resource. That is, the TCI State used by two or more resources in the first resource can be derived from the TCI State set configured by a resource in the first resource. As an example, taking the resource as a BWP and the first resource as the first BWP as an example, the TCI State used by two or more BWPs in the first BWP is derived from the TCI State set configured by a BWP in the first BWP. For example, the first BWP includes two activated BWPs (such as BWP1 and BWP2), and the beam indication information can indicate BWP1 and BWP2 in the first BWP. The TCI State of BWP1 and BWP2 in the first BWP can be derived from the TCI State set configured by the BWP1 (that is, the TCI State set of the BWP1 included in the configuration information). As another example, taking the resource as a cell and the first resource as the first cell, the TCI State used by two or more cells in the first cell can be derived from the TCI State set configured for a cell in the first cell. For example, the first cell includes two activated cells (such as cell 1 and cell 2), and the beam indication information can indicate cell 1 and cell 2 in the first cell. The TCI State of cell 1 and cell 2 in the first cell can be derived from the TCI State set configured for cell 1 (that is, the TCI State set of cell 1 included in the configuration information).

[0151] In another implementation, the TCI State used by two or more resources in the first resource is derived from the TCI State set configured for a resource in the second resource. That is, the TCI State used by two or more resources in the first resource may be derived from the TCI State set configured for a resource in the second resource. As an example, taking the resource as a BWP, the first resource as a first BWP, and the second resource as a second BWP as an example, the TCI State used by two or more BWPs in the first BWP is derived from the TCI State set configured for a BWP in the second BWP. For example, the first BWP includes two activated BWPs (such as BWP1 and BWP2), and the second BWP includes BWP3 and BWP4. The beam indication information may indicate BWP1 and BWP2 in the first BWP, and the TCI State of BWP1 and BWP2 in the first BWP may be derived from the TCI State set configured for BWP3 (i.e., the TCI State set of BWP3 included in the configuration information). As another example, taking the resource as a cell, the first resource as a first cell, and the second resource as a second cell as an example, the TCI State used by two or more cells in the first cell can be derived from the TCI State set configured for a cell in the second cell. For example, the first cell includes two activated cells (such as cell 1 and cell 2), and the second cell includes cell 3 and cell 4. The beam indication information can indicate cell 1 and cell 2 in the first cell, and the TCI State of cell 1 and cell 2 in the first cell can be derived from the TCI State set configured for cell 3 (that is, the TCI State set of cell 3 included in the configuration information).

[0152] In some embodiments of the present disclosure, the beam indication information may include, but is not limited to, at least one of the following information: a resource identifier and a TCI State identifier. The resource identifier may indicate the first resource or the second resource; the TCI State identifier may indicate the TCI State corresponding to the beam indication information, one TCI State corresponds to one TCI State identifier, and the one or more TCI States included in the beam indication information are not the TCI States configured by the first resource itself. As an example, the one or more TCI States included in the beam indication information may be the TCI State configured by the second resource. In one possible implementation, the resource identifier may be a BWP identifier and / or a cell identifier.

[0153] In one implementation, the beam indication information may include a BWP identifier and a TCI State identifier, wherein the BWP identifier may indicate the first BWP, and the TCI State identifier may indicate the TCI State corresponding to the beam indication information, and one TCI State corresponds to one TCI State identifier. As an example, relative to the first BWP (i.e., the BWP where data is transmitted), the BWP indicated by the TCI State belongs to the same cell as the first BWP. The BWP identifier may be the identifier of the first BWP (such as one or more activated BWPs), or may also be the identifier of the second BWP (i.e., one or more BWPs other than the first BWP). In this way, through this signaling, it is possible to indicate the beam of the first BWP or the beam of the second BWP through the beam information of the current BWP, thereby realizing cross-BWP beam indication.

[0154] In another implementation, the beam indication information may include a cell identifier and the TCI State identifier. The cell identifier may indicate other cells outside the serving cell of the terminal device, and the TCI State identifier may indicate the TCI State corresponding to the beam indication information, with one TCI State corresponding to one TCI State identifier. In this way, through this signaling, it is possible to indicate the beam of the first cell or the beam of the second cell through the beam information of the current cell, thereby realizing beam indication across cells or within the own cell.

[0155] In another implementation, the beam indication information may include a cell identifier, the BWP identifier, and the TCI State identifier. The cell identifier may indicate other cells outside the service cell of the terminal device, the BWP identifier may indicate the first BWP, and the TCI State identifier may indicate the TCI State corresponding to the beam indication information, and one TCI State corresponds to one TCI State identifier. As an example, relative to the first BWP (i.e., the BWP where data is transmitted), the BWP indicated by the TCI State belongs to a different cell from the first BWP. In this way, through this signaling, it is possible to indicate the beam of the first cell or the beam of the second cell through the beam information of the current cell, thereby realizing cross-cell beam indication.

[0156] Optionally, in some embodiments of the present disclosure, the beam indication information may be carried by at least one of the following methods: RRC signaling; MAC CE command; DCI signaling.

[0157] In this embodiment, the beam indication information may be carried by RRC signaling. That is, the beam indication information may be indicated by RRC signaling.

[0158] In this embodiment, the beam indication information may be carried by MAC CE signaling. That is, the beam indication information may be indicated by MAC CE signaling.

[0159] In this embodiment, the beam indication information may be carried by DCI signaling. That is, the beam indication information may be indicated by DCI signaling.

[0160] In this embodiment, the BWP identifier in the beam indication information can be carried by RRC signaling, and the TCI state identifier can be carried by DCI signaling. For example, when the terminal device moves slowly (such as in a stationary or quasi-static state), the BWP identifier in the beam indication information can be carried by RRC signaling, and the TCI state identifier can be carried by DCI signaling.

[0161] In this embodiment, the cell identifier in the beam indication information can be carried by RRC signaling, and the TCI state identifier can be carried by DCI signaling. For example, when the terminal device moves slowly (such as in a stationary or quasi-static state), the cell identifier in the beam indication information can be carried by RRC signaling, and the TCI state identifier can be carried by DCI signaling.

[0162] In this embodiment, the cell identifier in the beam indication information can be carried through RRC signaling, the BWP identifier can be carried through MAC CE signaling, and the TCI status identifier can be carried through DCI signaling.

[0163] It should be noted that the above-mentioned embodiments for beam indication information are not exhaustive, but are only illustrations of some embodiments, and the above-mentioned embodiments can be implemented individually or in combination. The above-mentioned embodiments are only for illustration and are not intended to be a specific limitation on the scope of protection of the embodiments of the present disclosure.

[0164] In some embodiments of the present disclosure, the beam corresponding to the TCI State in the TCI State set of the first resource is a narrow beam, and the beam corresponding to the TCI State in the TCI State set of the second resource is a wide beam. In this way, the simultaneous activation of beams of multiple widths can be achieved. It can be understood that the angle between the two half-power points (i.e., 3dB gain points) of the beam can indicate the width of the beam, wherein the larger the angle, the wider the beam, and the smaller the angle, the narrower the beam. The wide beam may refer to the angle between the two half-power points (i.e., 3dB gain points) of the beam being greater than or equal to the angle threshold. For example, if the angle between the two half-power points (i.e., 3dB gain points) of the beam is less than the angle threshold, the beam can be called a narrow beam. In this way, the beam of the first resource can be indicated by the beam information of the second resource (i.e., the beam information of the wide beam), that is, the narrow beam can be indicated by the beam information of the wide beam resource, thereby realizing beam indication across resources.

[0165] In some embodiments of the present disclosure, the beam corresponding to the TCI State in the TCI State set of the first resource is a wide beam, and the beam corresponding to the TCI State in the TCI State set of the second resource is a narrow beam. In this way, the beam information of the second resource (i.e., the beam information of the narrow beam) can be used to indicate the beam of the first resource, that is, the beam information of the narrow beam resource is used to indicate the wide beam, thereby achieving cross-resource beam indication.

[0166] In step 303, data is sent and / or received based on the target beam corresponding to the beam indication information.

[0167] In the embodiment of the present disclosure, step 303 may be implemented in any of the embodiments of the present disclosure, which is not limited here and will not be described in detail.

[0168] In an embodiment of the present disclosure, the TCI State set of multiple resources is configured through configuration information. In this way, when beam switching is required, the beam of other resources is indicated by the beam information of the current resource, and beam indication across resources (such as BWP or cell) can be achieved. Since the beam of other resources can be derived from the configuration information, there is no need to reconfigure to update the TCI State set, thereby saving resource overhead, avoiding resource waste, and optimizing the delay of beam indication.

[0169] It is worth noting that the cross-resource beam indication scheme provided by the present disclosure includes cross-BWP beam indication and cross-cell beam indication. For ease of understanding, embodiments of the cross-BWP beam indication scheme and the cross-cell beam indication scheme are respectively given below, wherein this embodiment is described from the perspective of the network device side.

[0170] In an embodiment of the present disclosure, the cross-BWP beam indication scheme may include but is not limited to the following steps: step 301a, step 302a, and step 303a as described below.

[0171] In step 301a, the network device sends configuration information to the terminal device, which includes the TCI State set of the first BWP and the TCI State set of the second BWP. The TCI State set of the first BWP includes one or more TCI States, and the second BWP includes one or more TCI States. The one or more TCI States correspond to one or more beams, that is, each TCI State corresponds to a beam.

[0172] In step 302a, the network device sends beam indication information to the terminal device, and the beam indication information may include one or more TCI States. The one or more TCI States can be used to indicate the beam used on the first BWP. The one or more TCI States are TCI States configured for non-first BWP, such as TCI States configured for the second BWP.

[0173] In this embodiment, the implementation of the first BWP and the second BWP can be implemented by any of the embodiments of the present disclosure, which is not limited here and will not be described in detail.

[0174] In step 303a, the network device sends and / or receives data based on the target beam corresponding to the beam indication information.

[0175] In the embodiment of the present disclosure, step 303a may be implemented in any of the embodiments of the present disclosure, which is not limited here and will not be described in detail.

[0176] In an embodiment of the present disclosure, the cross-cell beam indication scheme may include but is not limited to the following steps: step 301b, step 302b, and step 303b as described below.

[0177] In step 301b, the network device sends configuration information to the terminal device, which includes the TCI State set of the first cell and the TCI State set of the second cell. The TCI State set of the first cell includes one or more TCI States, and the TCI State set of the second cell includes one or more TCI States. The one or more TCI States correspond to one or more beams, that is, each TCI State corresponds to a beam.

[0178] In step 302b, the network device sends beam indication information to the terminal device, and the beam indication information may include one or more TCI States, and the one or more TCI States can be used to indicate the beam used on the first cell. The one or more TCI States are TCI States configured for a non-first cell, such as a TCI State configured for a second cell.

[0179] In this embodiment, the implementation of the first cell and the second cell may be implemented by any of the embodiments of the present disclosure, which is not limited here and will not be described in detail.

[0180] In step 303b, the network device sends and / or receives data based on the target beam corresponding to the beam indication information.

[0181] In the embodiment of the present disclosure, step 303b may be implemented in any of the embodiments of the present disclosure, which is not limited here and will not be described in detail.

[0182] It's important to note that beams in the terahertz band are extremely narrow. When a mobile device is in motion, frequent beam switching and beam indication occur; using a wide beam can reduce these. When the device is static or quasi-static, using a thin beam can better guarantee transmission rates. The following describes different application scenarios to illustrate how beam indication is performed during beam switching.

[0183] In application scenario 1, the working resource of the terminal device is a first resource, and the beam of the first resource is a narrow beam. When the UE moves rapidly, the beam information of the second resource (i.e., beam information of a wide beam) is used to indicate the beam of the first resource. Specifically, the beam indication method may include but is not limited to the following steps: step 301c, step 302c, and step 303c as described below.

[0184] In step 301c, the network device determines that the speed of the terminal device changes from a first speed to a second speed, wherein the first speed is lower than a first speed threshold, the second speed is higher than a second speed threshold, and the first speed threshold is less than or equal to the second speed threshold.

[0185] Optionally, the network device may utilize a perception algorithm to determine perception data such as the speed, direction, and angle of the terminal device, and utilize the perception data to determine the moving speed and / or moving direction of the terminal device. The network device determines whether the speed of the terminal device changes from a first speed to a second speed based on the moving speed and / or moving direction of the terminal device. Upon determining that the speed of the terminal device changes from the first speed to the second speed, the network device determines that the terminal device requires beam switching. It is understood that if the terminal device moves radially, beam switching is not required. However, if the terminal device moves laterally and the beam switching conditions are met, beam switching is required.

[0186] In step 302c, the network device sends first beam indication information to the terminal device. The first beam indication information includes one or more first TCI States and / or TCI State IDs, the one or more first TCI States are used to indicate the beam used on the first resource, the one or more first TCI States include the TCI State configured by the second resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, the TCI State corresponding to the TCI State ID includes the TCI State configured by the first resource, wherein the beam corresponding to the TCIState in the TCI State set of the first resource is a narrow beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a wide beam.

[0187] In the embodiments of the present disclosure, for the description of the first resource and the second resource, reference may be made to the description of the relevant implementation manners of the first resource and the second resource above, which will not be repeated here.

[0188] In step 303c, the network device sends and / or receives data based on the target beam corresponding to the first beam indication information.

[0189] In a possible implementation, the beam indicated by the first beam indication information is a downlink beam, and the network device can send data based on the target downlink transmission beam corresponding to the first beam indication information.

[0190] In some embodiments of the present disclosure, the network device determines that the speed of the terminal device changes from the second speed to the first speed; the network device sends second beam indication information to the terminal device, the second beam indication information includes one or more second transmission configuration indication states TCI State and / or TCI State ID, the one or more second TCI States are used to indicate the beam used on the first resource, the one or more second TCI States include the TCI State configured by the first resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the first resource; the network device sends and / or receives data based on the target beam corresponding to the second beam indication information. In this way, the working resource of the terminal device is the first resource, and the beam of the first resource is a wide beam. When the terminal device changes from the second speed to the first speed (such as from a mobile state to a stationary state), the beam information of the current working resource (i.e., the first resource) (i.e., beam information of a narrow beam) can be used to indicate its own beam.

[0191] By implementing the embodiments of the present disclosure, the working resource of the terminal device is the first resource, and the beam of the first resource is a narrow beam. When the terminal device changes from a first speed to a second speed (such as from a stationary state to a moving state, such as fast movement), the beam of the first resource can be indicated by the beam information of the second resource, that is, the narrow beam of the first resource can be indicated by the beam information of the second resource corresponding to the wide beam, so that the terminal device can generate the target beam of the first resource based on the beam information of the second resource, thereby realizing beam indication across resources (such as BWP or cell), thereby saving resource overhead, avoiding resource waste, and optimizing the delay of beam indication.

[0192] In application scenario 2, the working resource of the terminal device is a first resource, and the beam of the first resource is a wide beam. When the UE is stationary, the beam information of the second resource (i.e., the beam information of the narrow beam) is used to indicate the beam of the first resource. Specifically, the beam indication method may include but is not limited to the following steps: step 301d, step 302d, and step 303d below.

[0193] In step 301d, the network device determines that the speed of the terminal device changes from the second speed to the first speed, wherein the first speed is lower than the first speed threshold, the second speed is higher than the second speed threshold, and the first speed threshold is less than or equal to the second speed threshold.

[0194] Optionally, the network device may utilize a perception algorithm to determine perception data such as the speed, direction, and angle of the terminal device, and utilize the perception data to determine the moving speed and / or moving direction of the terminal device. The network device determines whether the speed of the terminal device changes from a first speed to a second speed based on the moving speed and / or moving direction of the terminal device. Upon determining that the speed of the terminal device changes from the first speed to the second speed, the network device determines that the terminal device requires beam switching. It is understood that if the terminal device moves radially, beam switching is not required. However, if the terminal device moves laterally and the beam switching conditions are met, beam switching is required.

[0195] In step 302d, the network device sends first beam indication information to the terminal device, and the first beam indication information includes one or more first transmission configuration indication states TCI State and / or TCI State ID, the one or more first TCI States are used to indicate the beam used on the first resource, the one or more first TCI States include the TCI State configured by the second resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the second resource, wherein the beam corresponding to the TCIState in the TCI State set of the first resource is a wide beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a narrow beam.

[0196] In the embodiments of the present disclosure, for the description of the first resource and the second resource, reference may be made to the description of the relevant implementation manners of the first resource and the second resource above, which will not be repeated here.

[0197] In step 303d, the network device sends and / or receives data based on the target beam corresponding to the first beam indication information.

[0198] In the embodiment of the present disclosure, step 303d may be implemented in any of the embodiments of the present disclosure, which is not limited here and will not be described in detail.

[0199] In some embodiments of the present disclosure, the network device determines that the speed of the terminal device changes from the first speed to the second speed. The network device sends a second beam indication information to the terminal device, and the second beam indication information includes one or more second transmission configuration indication states TCI State and / or TCI State ID, the one or more second TCI States are used to indicate the beam used on the first resource, and the one or more second TCI States are the TCI States configured for the first resource. The one or more first TCI States include the TCI State configured for the first resource, and the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured for the first resource. The network device sends and / or receives data based on the target beam corresponding to the second beam indication information. In this way, the working resource of the terminal device is the first resource, and the beam of the first resource is a wide beam. When the terminal device moves quickly, the beam information of the current working resource (i.e., the first resource) (i.e., the beam information of the wide beam) is used to indicate its own beam.

[0200] By implementing the embodiments of the present disclosure, the working resource of the terminal device is the first resource, and the beam of the first resource is a wide beam. When the terminal device changes from the second speed to the first speed (such as from a mobile state to a stationary state), the beam of the second resource can be indicated by the beam information of the first resource, that is, the wide beam of the second resource can be indicated by the beam information of the first resource corresponding to the narrow beam, so that the terminal device can generate a target beam of the second resource based on the beam information of the first resource, thereby realizing beam indication across resources (such as BWP or cell), thereby saving resource overhead, avoiding resource waste, and optimizing the delay of beam indication.

[0201] Application scenario 3: When downlink channel conditions change, beam switching and beam indication are required. Specifically, the beam indication method may include but is not limited to the following steps: step 301e, step 302e, and step 303e as described below.

[0202] In step 301e, the network device determines that the terminal device needs to perform beam switching based on the downlink channel condition.

[0203] In step 302e, the network device sends beam indication information to the terminal device, and the beam indication information includes one or more transmission configuration indication states TCI State and / or TCI State ID, the one or more TCI States are used to indicate the beam used on the first resource, the one or more TCI States include the TCI State configured by the second resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the second resource.

[0204] In step 303e, the network device sends and / or receives data based on the target beam corresponding to the beam indication information.

[0205] In one implementation, the beam corresponding to the TCI state configured by the first resource is a narrow beam, and the beam corresponding to the TCI state configured by the second resource is a wide beam. The working BWP of the terminal device is the first resource (such as an activated resource). When the downlink channel condition changes, if the terminal device is affected by surrounding external factors, resulting in a deterioration in the channel condition, the network device can send a beam indication message to the terminal device. The TCI State included in the beam indication message can indicate the first resource, and the TCI State included in the beam indication message is the TCI State configured by the second resource, that is, beam switching is achieved through cross-resource beam indication. Optionally, when the downlink channel condition improves, the network device can send another beam indication message to the terminal device. The TCI State included in the beam indication message can indicate the first resource, and the TCI State included in the beam indication message is the TCI State configured by the first resource itself, so as to achieve beam switching.

[0206] In another implementation, the beam corresponding to the TCI State in the TCI State set of the first resource is a wide beam, and the beam corresponding to the TCI State in the TCI State set of the second resource is a narrow beam. The working BWP of the terminal device is the first resource (such as the activation resource). When the downlink channel condition changes, if the terminal device is affected by the surrounding external factors, resulting in better channel conditions, the network device can send a beam indication message to the terminal device. The TCI State included in the beam indication message can indicate the first resource, and the TCI State included in the beam indication message is the TCI State configured by the second resource, that is, beam switching is achieved through cross-resource beam indication. Optionally, when the downlink channel condition deteriorates, the network device can send another beam indication message to the terminal device. The TCI State included in the beam indication message can indicate the first resource, and the TCI State included in the beam indication message is the TCI State configured by the first resource itself, so as to achieve beam switching.

[0207] By implementing the embodiments of the present disclosure, when it is determined that the terminal device needs to perform beam switching based on the downlink channel conditions, the beam information of the current resource can be used to indicate a beam other than its own (such as other resources other than its own resources), and beam indication across resources (such as BWP or cell) can be achieved, thereby saving resource overhead, avoiding resource waste, and optimizing the delay of beam indication.

[0208] Optionally, an embodiment of the present disclosure further provides a beam indication method, which is executed by a network device. The method may include but is not limited to the following steps: step 301f and step 302f as follows.

[0209] In step 301f, beam indication information is sent to the terminal device, and the beam indication information is used to select one or more TCI States from the configuration information or the TCI State set of the second resource. The one or more TCI States are used to indicate the beam used on the first resource, and the one or more TCI States include TCI States configured by non-first resources themselves. The configuration information is information configured by the network device for the terminal device, and the configuration information includes at least the TCI State set of the second resource.

[0210] Among them, in the embodiments of the present disclosure, the implementation method of the beam indication information can refer to the relevant description of the beam indication information above. The present disclosure does not limit this and will not elaborate on it.

[0211] In step 302f, data is sent and / or received based on the target beam corresponding to the beam indication information.

[0212] In the embodiment of the present disclosure, step 302f may be implemented in any of the embodiments of the present disclosure, which is not limited here and will not be described in detail.

[0213] In the embodiment of the present disclosure, beam information of the current resource is used to indicate the beams of other resources, so that beam indication across resources (such as BWP or cell) can be achieved, thereby saving resource overhead, avoiding resource waste, and optimizing the delay of beam indication.

[0214] It is understood that the above embodiment describes the implementation of the beam indication method of the embodiment of the present disclosure from the network device side. The embodiment of the present disclosure also proposes another beam indication method, and the implementation of the beam indication method will be described below from the terminal device side. Please refer to Figure 4, which is a flowchart of another beam indication method provided by the embodiment of the present disclosure. It should be noted that the method of the embodiment of the present disclosure can be executed by the terminal device. As shown in Figure 4, the method may include but is not limited to the following steps.

[0215] In step 401, beam indication information sent by a network device is received.

[0216] Optionally, when the channel conditions change or the terminal device moves, and the network device determines that the terminal device needs to perform beam switching, the network device can send beam indication information to the terminal device, and the terminal device can receive the beam indication information sent by the network device, and send and / or receive data through the target beam corresponding to the terminal device through the beam indication information.

[0217] In an embodiment of the present disclosure, the beam indication information may include one or more TCI States, which can be used to indicate the beam used on the first resource. The one or more TCI States are TCI States configured for non-first resources themselves, such as TCI States that can be configured for second resources.

[0218] Among them, the implementation method of the first resource, the second resource, and the beam indication information in the embodiment of the present disclosure can refer to the relevant description of the first resource, the second resource and the beam indication information on the above-mentioned network device side. No limitation is made here and no further details are given.

[0219] In step 402, data is sent and / or received based on the target beam corresponding to the beam indication information.

[0220] In an embodiment of the present disclosure, the terminal device can send and / or receive data based on the target beam corresponding to the beam indication information.

[0221] In one possible implementation, the beam indicated by the beam indication information is a downlink beam, and the terminal device can receive data based on the target downlink receive beam corresponding to the beam indication information. As an example, the data can be PDSCH data, and the terminal device can use the target downlink receive beam corresponding to the beam indication information to receive PDSCH data. It should be noted that the data can also be other types of data, which is not specifically limited in this disclosure and will not be described in detail.

[0222] In the embodiment of the present disclosure, beam information of the current resource is used to indicate the beams of other resources, so that beam indication across resources (such as BWP or cell) can be achieved, thereby saving resource overhead, avoiding resource waste, and optimizing the delay of beam indication.

[0223] Optionally, the network device can configure a plurality of (such as at least two) resource TCI State sets for the terminal device, so that the network device can activate the TCI State in the TCI State set of the plurality of resources for mapping to the TCI information field in the DCI. Specifically, please refer to Figure 5, which is a flow chart of another beam indication method provided by an embodiment of the present disclosure. It should be noted that the method can be executed by the terminal device, that is, the method can be described from the terminal device side. As shown in Figure 5, the method may include but is not limited to the following steps:

[0224] In step 501, configuration information sent by a network device is received.

[0225] In an embodiment of the present disclosure, the configuration information includes a TCI State set of a first resource and a TCI State set of a second resource, the TCI State set of the first resource includes one or more TCI States, the TCI State set of the second resource includes one or more TCI States, and one or more TCI States correspond to one or more beams, that is, one TCI State corresponds to one beam.

[0226] Among them, the implementation method of the configuration information in the embodiment of the present disclosure can refer to the relevant description of the configuration information on the network device side mentioned above, which is not limited to this and will not be repeated here.

[0227] In step 502, beam indication information sent by a network device is received.

[0228] In the embodiment of the present disclosure, step 502 may be implemented in any of the embodiments of the present disclosure, which is not limited here and will not be described in detail.

[0229] In step 503, data is sent and / or received based on the target beam corresponding to the beam indication information.

[0230] In the embodiment of the present disclosure, the implementation of step 503 may be implemented in any of the embodiments of the present disclosure, which is not limited here and will not be described in detail.

[0231] In the embodiment of the present disclosure, beam information of the current resource is used to indicate the beam of its own resource or other resources, so that beam indication across resources (such as BWP or cell) can be achieved, thereby saving resource overhead, avoiding resource waste, and optimizing the delay of beam indication.

[0232] It is worth noting that the cross-resource beam indication scheme provided by the present disclosure includes cross-BWP beam indication and cross-cell beam indication. For ease of understanding, the following will provide an embodiment of the cross-BWP beam indication scheme and an embodiment of the cross-cell beam indication scheme, respectively, wherein this embodiment is described from the terminal device side.

[0233] In an embodiment of the present disclosure, the cross-BWP beam indication scheme may include but is not limited to the following steps: step 501a, step 502a and step 503a as described below.

[0234] In step 501a, the terminal device receives configuration information sent by the network device, which includes the TCI State set of the first BWP and the TCI State set of the second BWP. The TCI State set of the first BWP includes one or more TCI States, and the TCI State set of the second BWP includes one or more TCI States. The one or more TCI States correspond to one or more beams, that is, each TCI State corresponds to a beam.

[0235] In step 502a, the terminal device receives beam indication information sent by the network device, and the beam indication information may include one or more TCI States, and the one or more TCI States can be used to indicate the beam used on the first BWP. The one or more TCI States are TCI States configured for non-first BWP, such as TCI States configured for the second BWP.

[0236] In this embodiment, the implementation of the first BWP and the second BWP can be implemented by any of the embodiments of the present disclosure, which is not limited here and will not be described in detail.

[0237] In step 503a, the terminal device sends and / or receives data based on the target beam corresponding to the beam indication information.

[0238] In the embodiment of the present disclosure, step 503a may be implemented in any of the embodiments of the present disclosure, which is not limited here and will not be described in detail.

[0239] In an embodiment of the present disclosure, the cross-cell beam indication scheme may include but is not limited to the following steps: step 501b, step 502b and step 503b as described below.

[0240] In step 501b, the terminal device receives configuration information sent by the network device, which includes the TCI State set of the first cell and the TCI State set of the second cell. The TCI State set of the first cell includes one or more TCI States, and the TCI State set of the second cell includes one or more TCI States. The one or more TCI States correspond to one or more beams, that is, each TCI State corresponds to a beam.

[0241] In step 502b, the terminal device receives beam indication information sent by the network device, and the beam indication information may include one or more TCI States, and the one or more TCI States can be used to indicate the beam used on the first cell. The one or more TCI States are TCI States configured for a non-first cell, such as a TCI State configured for a second cell.

[0242] In this embodiment, the implementation of the first cell and the second cell may be implemented by any of the embodiments of the present disclosure, which is not limited here and will not be described in detail.

[0243] In step 503b, the terminal device sends and / or receives data based on the target beam corresponding to the beam indication information.

[0244] In the embodiment of the present disclosure, step 503b may be implemented in any of the embodiments of the present disclosure, which is not limited here and will not be described in detail.

[0245] In the embodiments provided above, the methods provided in the embodiments of the present disclosure are described from the perspectives of network devices and terminal devices, respectively. To implement the various functions provided in the methods provided in the embodiments of the present disclosure, the network devices and terminal devices may include hardware structures and software modules, and the aforementioned functions may be implemented in the form of hardware structures, software modules, or hardware structures and software modules. Certain of the aforementioned functions may be implemented in the form of hardware structures, software modules, or hardware structures and software modules.

[0246] Please refer to Figure 6, which is a schematic diagram of the structure of a communication device 60 provided in an embodiment of the present disclosure. The communication device 60 shown in Figure 6 may include a transceiver module 601 and a processing module 602. The transceiver module 601 may include a sending module and / or a receiving module. The sending module is used to implement a sending function, and the receiving module is used to implement a receiving function. The transceiver module 601 can implement the sending function and / or the receiving function.

[0247] The communication device 60 may be a terminal device, a device in a terminal device, or a device that can be used in conjunction with a terminal device. Alternatively, the communication device 60 may be a network device, a device in a network device, or a device that can be used in conjunction with a network device.

[0248] The communication device 60 is a network device: a transceiver module 601 is used to send beam indication information to a terminal device, the beam indication information includes one or more transmission configuration indication states TCI State and / or TCI State ID, one or more TCI States are used to indicate the beam used on the first resource, one or more TCI States include a TCI State configured by a non-first resource itself, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes a TCI State configured by a non-first resource itself; the transceiver module 601 is also used to send and / or receive data based on the target beam corresponding to the beam indication information.

[0249] In one implementation, the transceiver module 601 is also used to: send configuration information to the terminal device, the configuration information includes a TCI State set of a first resource and a TCI State set of a second resource, the TCI State set of the first resource includes one or more TCI States, the TCI State set of the second resource includes one or more TCI States, and the TCI State corresponds to a beam.

[0250] In a possible implementation, the first resource is one or more activated resources, and the second resource is one or more resources other than the first resource.

[0251] In one possible implementation, the TCI State used by a resource in the first resource is derived from the TCI State set configured by another resource other than one resource in the first resource; or, the TCI State used by a resource in the first resource is derived from the TCI State set configured by a resource in the second resource.

[0252] In one possible implementation, the TCI State used by two or more resources in the first resource is derived from the TCI State set configured by a resource in the first resource; or, the TCI State used by two or more resources in the first resource is derived from the TCI State set configured by a resource in the second resource.

[0253] In one implementation, the beam corresponding to the TCI State in the TCI State set of the first resource is a narrow beam, and the beam corresponding to the TCI State in the TCI State set of the second resource is a wide beam; or, the beam corresponding to the TCI State in the TCI State set of the first resource is a wide beam, and the beam corresponding to the TCI State in the TCI State set of the second resource is a narrow beam.

[0254] In one implementation, the first resource is a first cell, and the second resource is a second cell; or, the first resource is a first bandwidth part BWP, and the second resource is a second BWP.

[0255] In one implementation, the beam indication information includes at least one of the following information:

[0256] a resource identifier, where the resource identifier indicates the first resource or the second resource;

[0257] TCI State identifier, the TCI State identifier indicates the TCI State corresponding to the beam indication information.

[0258] In one possible implementation, the beam indication information includes a BWP identifier and a TCI State identifier, and the BWP identifier indicates the first BWP or the second BWP; or, the beam indication information includes a cell identifier and a TCI State identifier, and the cell identifier indicates other cells outside the service cell of the terminal device; or, the beam indication information includes a cell identifier, a BWP identifier and a TCI State identifier, and the cell identifier indicates other cells outside the service cell of the terminal device.

[0259] In one implementation, the beam indication information is carried in at least one of the following ways:

[0260] Radio Resource Control (RRC) signaling;

[0261] Media Access Control MAC Control Element CE command;

[0262] Downlink control information DCI signaling.

[0263] In one implementation, the transceiver module 601 is specifically configured to transmit data based on a target downlink transmission beam corresponding to the beam indication information.

[0264] The communication device 60 is a network device: a processing module 602 is used to determine whether the speed of the terminal device changes from a first speed to a second speed, wherein the first speed is lower than a first speed threshold, the second speed is higher than a second speed threshold, and the first speed threshold is less than or equal to the second speed threshold. The transceiver module 601 is used to send beam indication information to the terminal device, the beam indication information including one or more transmission configuration indication states TCI State and / or TCI State ID, one or more TCI States are used to indicate the beam used on the first resource, one or more TCI States include the TCI State configured by the second resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, the TCI State corresponding to the TCI State ID includes the TCI State configured by the second resource, wherein the beam corresponding to the TCI State in the TCI State set of the first resource is a narrow beam, and the beam corresponding to the TCI State in the TCI State set of the second resource is a wide beam; the transceiver module 601 is also used to send and / or receive data based on the target beam corresponding to the beam indication information.

[0265] In one implementation, the processing module 602 is also used to determine whether the speed of the terminal device changes from the second speed to the first speed; the transceiver module 601 is also used to send second beam indication information to the terminal device, the second beam indication information includes one or more second transmission configuration indication states TCI State and / or TCI State ID, one or more second TCI States are used to indicate the beam used on the first resource, one or more second TCI States include the TCI State configured by the first resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the first resource; the transceiver module 601 is also used to send and / or receive data based on the target beam corresponding to the second beam indication information.

[0266] The communication device 60 is a network device: a processing module 602 is used to determine that the speed of the terminal device changes from a second speed to a first speed, wherein the first speed is lower than the first speed threshold, the second speed is higher than the second speed threshold, and the first speed threshold is less than or equal to the second speed threshold; the transceiver module 601 is used to send first beam indication information to the terminal device, the first beam indication information includes one or more first transmission configuration indication states TCI State and / or transmission configuration indication state identifier TCI State ID, one or more first TCI States are used to indicate the beam used on the first resource, and one or more first TCI States include the TCI State configured by the second resource. The TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the second resource, wherein the beam corresponding to the TCIState in the TCI State set of the first resource is a wide beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a narrow beam; the transceiver module 601 is also used to send and / or receive data based on the target beam corresponding to the first beam indication information.

[0267] In one implementation, the processing module 602 is also used to determine whether the speed of the terminal device changes from a first speed to a second speed; the transceiver module 601 is also used to send second beam indication information to the terminal device, the second beam indication information includes one or more second transmission configuration indication states TCI State and / or TCI State ID, one or more second TCI States are used to indicate the beam used on the first resource, one or more second TCI States include the TCI State configured by the first resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the first resource; the transceiver module 601 is also used to send and / or receive data based on the target beam corresponding to the second beam indication information.

[0268] The communication device 60 is a network device: a processing module 602 is used to determine whether the terminal device needs to perform beam switching based on the downlink channel conditions; a transceiver module 601 is used to send beam indication information to the terminal device, the beam indication information includes one or more transmission configuration indication states TCI State and / or transmission configuration indication state identifier TCI State ID, one or more TCI States are used to indicate the beam used on the first resource, one or more TCI States include the TCI State configured by the second resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the second resource; the transceiver module 601 is also used to send and / or receive data based on the target beam corresponding to the beam indication information.

[0269] In one implementation, the beam corresponding to the TCIState in the TCI State set of the first resource is a narrow beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a wide beam; or, the beam corresponding to the TCIState in the TCI State set of the first resource is a wide beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a narrow beam.

[0270] The communication device 60 is a terminal device: the transceiver module 601 is used to receive beam indication information sent by the network device, the beam indication information includes one or more transmission configuration indication states TCI State and / or transmission configuration indication state identifier TCI State ID, one or more TCI States are used to indicate the beam used on the first resource, one or more TCI States include a TCI State configured by a non-first resource itself, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes a TCI State ID configured by a non-first resource itself; the transceiver module 601 is also used to send and / or receive data based on the target beam corresponding to the beam indication information.

[0271] In one implementation, the transceiver module 601 is also used to: receive configuration information sent by the network device, the configuration information includes a TCI State set of a first resource and a TCI State set of a second resource, the TCI State set of the first resource includes one or more TCI States, the TCI State set of the second resource includes one or more TCI States, and each TCI State corresponds to a beam.

[0272] In a possible implementation, the first resource is one or more activated resources, and the second resource is one or more resources other than the first resource.

[0273] In one possible implementation, the TCI State used by a resource in the first resource is derived from the TCI State set configured by another resource other than one resource in the first resource; or, the TCI State used by a resource in the first resource is derived from the TCI State set configured by a resource in the second resource.

[0274] In one possible implementation, the TCI State used by two or more resources in the first resource is derived from the TCI State set configured by a resource in the first resource; or, the TCI State used by two or more resources in the first resource is derived from the TCI State set configured by a resource in the second resource.

[0275] In one implementation, the beam corresponding to the TCI State in the TCI State set of the first resource is a narrow beam, and the beam corresponding to the TCI State in the TCI State set of the second resource is a wide beam; or, the beam corresponding to the TCI State in the TCI State set of the first resource is a wide beam, and the beam corresponding to the TCI State in the TCI State set of the second resource is a narrow beam.

[0276] In a possible implementation, the first resource is a first cell, and the second resource is a second cell; or, the first resource is a first bandwidth part BWP, and the second resource is a second BWP.

[0277] In one implementation, the beam indication information includes at least one of the following information:

[0278] a resource identifier, where the resource identifier indicates the first resource or the second resource;

[0279] TCI State identifier, the TCI State identifier indicates the TCI State corresponding to the beam indication information.

[0280] In one possible implementation, the beam indication information includes a BWP identifier and a TCI State identifier, and the BWP identifier indicates the first BWP or the second BWP; or, the beam indication information includes a cell identifier and a TCI State identifier, and the cell identifier indicates other cells outside the service cell of the terminal device; or, the beam indication information includes a cell identifier, a BWP identifier and a TCI State identifier, and the cell identifier indicates other cells outside the service cell of the terminal device.

[0281] In one implementation, the beam indication information is carried in at least one of the following ways:

[0282] Radio Resource Control (RRC) signaling;

[0283] Media Access Control MAC Control Element CE command;

[0284] Downlink control information DCI signaling.

[0285] In one implementation, the transceiver module 601 is specifically configured to receive data based on the target downlink receiving beam corresponding to the beam indication information.

[0286] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0287] Please refer to Figure 7, which is a schematic diagram of the structure of another communication device 70 provided in an embodiment of the present disclosure. Communication device 70 can be a network device or a terminal device, or a chip, chip system, or processor that supports the network device to implement the above method, or a chip, chip system, or processor that supports the terminal device to implement the above method. This device can be used to implement the method described in the above method embodiment. For details, please refer to the description of the above method embodiment.

[0288] The communication device 70 may include one or more processors 701. The processor 701 may be a general-purpose processor or a dedicated processor. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control the communication device (e.g., a base station, a baseband chip, a terminal device, a terminal device chip, a DU or CU, etc.), execute computer programs, and process computer program data.

[0289] Optionally, the communication device 70 may further include one or more memories 702, on which a computer program 704 may be stored. The processor 701 executes the computer program 704 to cause the communication device 70 to perform the method described in the above method embodiment. Optionally, the memory 702 may also store data. The communication device 70 and the memory 702 may be provided separately or integrated together.

[0290] Optionally, the communication device 70 may further include a transceiver 705 and an antenna 706. The transceiver 705 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc., and is configured to implement transceiver functions. The transceiver 705 may include a receiver and a transmitter. The receiver may be referred to as a receiver or a receiving circuit, etc., and is configured to implement a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., and is configured to implement a transmitting function.

[0291] Optionally, the communication device 70 may further include one or more interface circuits 707. The interface circuit 707 is configured to receive code instructions and transmit the code instructions to the processor 701. The processor 701 executes the code instructions to enable the communication device 70 to execute the method described in the above method embodiment.

[0292] The communication device 70 is a network device: the transceiver 705 is used to execute steps 201 and 202 in FIG. 2 ; or execute steps 301 , 302 , and 303 in FIG. 3 .

[0293] The communication device 70 is a terminal device: the transceiver 705 is used to execute steps 401 and 402 in FIG. 4 ; or execute steps 501 , 502 , and 503 in FIG. 5 .

[0294] In one implementation, the processor 701 may include a transceiver for implementing receiving and transmitting functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing the receiving and transmitting functions may be separate or integrated. The transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or may be used for transmitting or delivering signals.

[0295] In one implementation, the processor 701 may store a computer program that runs on the processor 701 and enables the communication device 70 to perform the method described in the above method embodiment. The computer program may be fixed in the processor 701, in which case the processor 701 may be implemented by hardware.

[0296] In one implementation, the communication device 70 may include a circuit that can implement the functions of sending, receiving, or communicating in the aforementioned method embodiments. The processor and transceiver described in the present disclosure can be implemented on an integrated circuit (IC), an analog IC, a radio frequency integrated circuit RFIC, a mixed signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (nMetal-oxide-semiconductor, NMOS), P-type metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0297] The communication device described in the above embodiments may be a network device or a terminal device, but the scope of the communication device described in this disclosure is not limited thereto, and the structure of the communication device may not be limited to FIG7 . The communication device may be an independent device or may be part of a larger device. For example, the communication device may be:

[0298] (1) An independent integrated circuit (IC), or chip, or chip system or subsystem;

[0299] (2) a collection of one or more ICs, optionally including a storage component for storing data and computer programs;

[0300] (3) ASIC, such as modem;

[0301] (4) Modules that can be embedded in other devices;

[0302] (5) Receivers, terminal devices, intelligent terminal devices, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.;

[0303] (6)Others, etc.

[0304] Those skilled in the art will also appreciate that the various illustrative logical blocks and steps listed in the embodiments of the present disclosure may be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art may use various methods to implement the described functionality for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of the present disclosure.

[0305] An embodiment of the present disclosure also provides a beam indication system, which includes the communication device as a terminal device and the communication device as a network device in the embodiment of Figure 6 above, or the system includes the communication device as a terminal device and the communication device as a network device in the embodiment of Figure 7 above.

[0306] The present disclosure also provides a readable storage medium having instructions stored thereon, which implement the functions of any of the above method embodiments when executed by a computer.

[0307] The present disclosure also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0308] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented using software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present disclosure are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. 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 integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0309] Those skilled in the art will understand that the various numerical numbers such as first and second involved in the present disclosure are only for the convenience of description and are not used to limit the scope of the embodiments of the present disclosure, and also indicate the order of precedence.

[0310] The at least one in the present disclosure can also be described as one or more, and the multiple can be two, three, four or more, which is not limited in the present disclosure. In the embodiments of the present disclosure, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", and there is no order of precedence or size between the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0311] The correspondences shown in the tables of the present disclosure can be configured or predefined. The values ​​of the information in each table are merely examples and can be configured to other values, which are not limited by the present disclosure. When configuring the correspondences between information and parameters, it is not necessarily required to configure all the correspondences shown in each table. For example, in the tables of the present disclosure, the correspondences shown in certain rows may not be configured. For another example, appropriate deformation adjustments can be made based on the above tables, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables may also adopt other names that can be understood by the communication device, and the values ​​or representations of the parameters may also adopt other values ​​or representations that can be understood by the communication device. When implementing the above tables, other data structures may also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables, etc.

[0312] The predefined in the present disclosure may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0313] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0314] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0315] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A beam indication method, characterized in that: The method is performed by a network device, and the method includes: Sending beam indication information to a terminal device, the beam indication information including one or more transmission configuration indication states TCI States and / or transmission configuration indication state identifiers TCI State IDs, the one or more TCI States being used to indicate a beam used on a first resource, the one or more TCI States including a TCI State not configured by the first resource itself, the TCI State corresponding to the TCI State ID being used to indicate a beam used on the first resource, and the TCI State corresponding to the TCI State ID including a TCI State not configured by the first resource itself; Data is sent and / or received based on the target beam corresponding to the beam indication information.

2. The method according to claim 1, characterized in that The method further comprises: Configuration information is sent to the terminal device, wherein the configuration information includes a TCI State set of the first resource and a TCI State set of the second resource, wherein the TCI State set of the first resource includes one or more TCI States, and the TCI State set of the second resource includes one or more TCI States, and the TCI State corresponds to a beam.

3. The method according to claim 2, characterized in that The first resource is one or more activated resources, and the second resource is one or more resources other than the first resource.

4. The method according to claim 3, characterized in that The TCI State used by one of the first resources is derived from a TCI State set configured by another resource other than the one of the first resources; Alternatively, the TCI State used by one of the first resources is derived from a TCI State set configured by one of the second resources.

5. The method according to claim 3, characterized in that The TCI State used by two or more resources in the first resources is derived from the TCI State set configured by one resource in the first resources; Alternatively, the TCI State used by two or more resources in the first resources is derived from a TCI State set configured by one resource in the second resources.

6. The method according to any one of claims 2 to 5, characterized in that The beam corresponding to the TCIState in the TCI State set of the first resource is a narrow beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a wide beam; Alternatively, the beam corresponding to the TCIState in the TCI State set of the first resource is a wide beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a narrow beam.

7. The method according to any one of claims 2 to 6, characterized in that The first resource is a first cell, and the second resource is a second cell; Alternatively, the first resource is a first bandwidth part BWP, and the second resource is a second BWP.

8. The method according to any one of claims 1 to 6, characterized in that The beam indication information includes at least one of the following information: a resource identifier, wherein the resource identifier indicates the first resource; A TCI State identifier, wherein the TCI State identifier indicates the TCI State corresponding to the beam indication information.

9. The method according to claim 8, characterized in that The beam indication information includes a BWP identifier and the TCI State identifier, and the BWP identifier indicates a first BWP; Alternatively, the beam indication information includes a cell identifier and the TCI State identifier, and the cell identifier indicates other cells other than the serving cell of the terminal device; Alternatively, the beam indication information includes a cell identifier, the BWP identifier and the TCI State identifier.

10. The method according to any one of claims 1 to 9, characterized in that The beam indication information is carried in at least one of the following ways: Radio Resource Control (RRC) signaling; Media Access Control MAC Control Element CE command; Downlink control information DCI signaling.

11. The method according to claim 1, characterized in that The sending and / or receiving of data based on the target beam corresponding to the beam indication information includes: Data is sent based on the target downlink transmission beam corresponding to the beam indication information.

12. A beam indication method, characterized in that: The method is performed by a network device, and the method includes: Determine that the speed of the terminal device changes from a first speed to a second speed, wherein the first speed is lower than a first speed threshold, the second speed is higher than a second speed threshold, and the first speed threshold is less than or equal to the second speed threshold; Sending first beam indication information to the terminal device, the first beam indication information including one or more first transmission configuration indication states TCI States and / or transmission configuration indication state identifiers TCI State IDs, the one or more first TCI States are used to indicate the beam used on the first resource, the one or more first TCI States include the TCI State configured by the second resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the second resource, wherein the beam corresponding to the TCIState in the TCI State set of the first resource is a narrow beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a wide beam; Data is sent and / or received based on the target beam corresponding to the first beam indication information.

13. The method according to claim 12, characterized in that The method further comprises: Determine that the speed of the terminal device changes from the second speed to the first speed; Sending second beam indication information to the terminal device, the second beam indication information including one or more second transmission configuration indication states TCI State and / or TCI State ID, the one or more second TCI States are used to indicate the beam used on the first resource, the one or more second TCI States include the TCI State configured by the first resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the first resource; Data is sent and / or received based on the target beam corresponding to the second beam indication information.

14. A beam indication method, characterized in that: The method is performed by a network device, and the method includes: Determine that the speed of the terminal device changes from a second speed to a first speed, wherein the first speed is lower than a first speed threshold, the second speed is higher than a second speed threshold, and the first speed threshold is less than or equal to the second speed threshold; Sending first beam indication information to the terminal device, the first beam indication information including one or more first transmission configuration indication states TCI States and / or transmission configuration indication state identifiers TCI State IDs, the one or more first TCI States are used to indicate the beam used on the first resource, the one or more first TCI States include the TCI State configured by the second resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the second resource, wherein the beam corresponding to the TCIState in the TCI State set of the first resource is a wide beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a narrow beam; Data is sent and / or received based on the target beam corresponding to the first beam indication information.

15. The method according to claim 14, characterized in that The method further comprises: Determining that the speed of the terminal device changes from the first speed to the second speed; Sending second beam indication information to the terminal device, the second beam indication information including one or more second transmission configuration indication states TCI State and / or TCI State ID, the one or more second TCI States are used to indicate the beam used on the first resource, the one or more second TCI States include the TCI State configured by the first resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the first resource; Data is sent and / or received based on the target beam corresponding to the second beam indication information.

16. A beam indication method, characterized in that: The method is performed by a network device, and the method includes: Determining that the terminal device needs to perform beam switching according to downlink channel conditions; Sending beam indication information to the terminal device, the beam indication information including one or more transmission configuration indication states TCI State and / or transmission configuration indication state identifier TCI State ID, the one or more TCI States are used to indicate the beam used on the first resource, the one or more TCI States include the TCI State configured by the second resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the second resource; Data is sent and / or received based on the target beam corresponding to the beam indication information.

17. The method according to claim 16, characterized in that The beam corresponding to the TCIState in the TCI State set of the first resource is a narrow beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a wide beam; Alternatively, the beam corresponding to the TCIState in the TCI State set of the first resource is a wide beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a narrow beam.

18. A beam indication method, characterized in that: The method is performed by a terminal device, and the method includes: Receive beam indication information sent by a network device, the beam indication information including one or more transmission configuration indication states TCI States and / or transmission configuration indication state identifiers TCI State IDs, the one or more TCI States are used to indicate a beam used on a first resource, the one or more TCI States include a TCI State that is not configured by the first resource itself, the TCI State corresponding to the TCI State ID is used to indicate a beam used on the first resource, and the TCI State corresponding to the TCI State ID includes a TCI State ID that is not configured by the first resource itself; Data is sent and / or received based on the target beam corresponding to the beam indication information.

19. The method according to claim 18, characterized in that The method further comprises: Receive configuration information sent by the network device, the configuration information including a TCI State set of the first resource and a TCI State set of the second resource, the TCI State set of the first resource including one or more TCI States, the TCI State set of the second resource including one or more TCI States, and each TCI State corresponds to a beam.

20. The method of claim 19, wherein: The first resource is one or more activated resources, and the second resource is one or more resources other than the first resource.

21. The method of claim 20, wherein: The TCI State used by one of the first resources is derived from a TCI State set configured by another resource other than the one of the first resources; Alternatively, the TCI State used by one of the first resources is derived from a TCI State set configured by one of the second resources.

22. The method of claim 20, wherein: The TCI State used by two or more resources in the first resources is derived from the TCI State set configured by one resource in the first resources; Alternatively, the TCI State used by two or more resources in the first resources is derived from a TCI State set configured by one resource in the second resources.

23. The method according to any one of claims 19 to 22, characterized in that The beam corresponding to the TCIState in the TCI State set of the first resource is a narrow beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a wide beam; Alternatively, the beam corresponding to the TCIState in the TCI State set of the first resource is a wide beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a narrow beam.

24. The method according to any one of claims 19 to 23, characterized in that The first resource is a first cell, and the second resource is a second cell; Alternatively, the first resource is a first bandwidth part BWP, and the second resource is a second BWP.

25. The method according to any one of claims 18 to 23, characterized in that The beam indication information includes at least one of the following information: a resource identifier, wherein the resource identifier indicates the first resource; A TCI State identifier, wherein the TCI State identifier indicates the TCI State corresponding to the beam indication information.

26. The method of claim 25, wherein: The beam indication information includes a BWP identifier and the TCI State identifier, and the BWP identifier indicates a first BWP; Alternatively, the beam indication information includes a cell identifier and the TCI State identifier, and the cell identifier indicates other cells other than the serving cell of the terminal device; Alternatively, the beam indication information includes a cell identifier, the BWP identifier and the TCI State identifier.

27. The method according to any one of claims 18 to 26, characterized in that The beam indication information is carried in at least one of the following ways: Radio Resource Control (RRC) signaling; Media Access Control MAC Control Element CE command; Downlink control information DCI signaling.

28. The method of claim 18, wherein: The sending and / or receiving of data based on the target beam corresponding to the beam indication information includes: Data is received based on the target downlink receiving beam corresponding to the beam indication information.

29. A communication device, characterized in that: include: A transceiver module, used to send beam indication information to a terminal device, wherein the beam indication information includes one or more transmission configuration indication states TCI States and / or transmission configuration indication state identifiers TCI State IDs, wherein the one or more TCI States are used to indicate a beam used on a first resource, wherein the one or more TCI States include a TCI State that is not configured by the first resource itself, and wherein the TCI State corresponding to the TCI State ID is used to indicate a beam used on the first resource, and wherein the TCI State corresponding to the TCI State ID includes a TCI State that is not configured by the first resource itself; The transceiver module is also used to send and / or receive data based on the target beam corresponding to the beam indication information.

30. A communication device, characterized in that: include: A processing module, configured to determine that a speed of a terminal device changes from a first speed to a second speed, wherein the first speed is lower than a first speed threshold, the second speed is higher than a second speed threshold, and the first speed threshold is less than or equal to the second speed threshold; A transceiver module, used to send first beam indication information to the terminal device, the first beam indication information including one or more first transmission configuration indication states TCI States and / or transmission configuration indication state identifiers TCI State IDs, the one or more first TCI States are used to indicate the beam used on the first resource, the one or more first TCI States include the TCI State configured by the second resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the second resource, wherein the beam corresponding to the TCIState in the TCI State set of the first resource is a narrow beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a wide beam; The transceiver module is also used to send and / or receive data based on the target beam corresponding to the first beam indication information.

31. A communication device, characterized in that: include: A processing module, configured to determine that the speed of the terminal device changes from a second speed to a first speed, wherein the first speed is lower than a first speed threshold, the second speed is higher than a second speed threshold, and the first speed threshold is less than or equal to the second speed threshold; A transceiver module, used to send first beam indication information to the terminal device, the first beam indication information including one or more first transmission configuration indication states TCI States and / or transmission configuration indication state identifiers TCI State IDs, the one or more first TCI States are used to indicate the beam used on the first resource, the one or more first TCI States include the TCI State configured by the second resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, the TCI State corresponding to the TCI State ID includes the TCI State configured by the second resource, wherein the beam corresponding to the TCIState in the TCI State set of the first resource is a wide beam, and the beam corresponding to the TCIState in the TCI State set of the second resource is a narrow beam; The transceiver module is also used to send and / or receive data based on the target beam corresponding to the first beam indication information.

32. A communication device, characterized in that: include: A processing module, used to determine that the terminal device needs to perform beam switching according to the downlink channel condition; A transceiver module, used to send beam indication information to the terminal device, the beam indication information including one or more transmission configuration indication states TCI State and / or transmission configuration indication state identifier TCI State ID, the one or more TCI States are used to indicate the beam used on the first resource, the one or more TCI States include the TCI State configured by the second resource, the TCI State corresponding to the TCI State ID is used to indicate the beam used on the first resource, and the TCI State corresponding to the TCI State ID includes the TCI State configured by the second resource; The transceiver module is also used to send and / or receive data based on the target beam corresponding to the beam indication information.

33. A communication device, characterized in that: include: A transceiver module, used to receive beam indication information sent by a network device, wherein the beam indication information includes one or more transmission configuration indication states TCI State and / or transmission configuration indication state identifier TCI State ID, wherein the one or more TCI States are used to indicate a beam used on a first resource, wherein the one or more TCI States include a TCI State that is not configured by the first resource itself, and the TCI State corresponding to the TCI State ID is used to indicate a beam used on the first resource, and the TCI State corresponding to the TCI State ID includes a TCI State ID that is not configured by the first resource itself; The transceiver module is also used to send and / or receive data based on the target beam corresponding to the beam indication information.

34. A communication device, characterized in that: The device comprises a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory so that the device performs the method according to any one of claims 1 to 28.

35. A computer-readable storage medium storing instructions, which, when executed, enable the method according to any one of claims 1 to 28 to be implemented.

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