Beam management method and communication device

Abstract

The present application provides a beam management method and a communication device, capable of improving the transmission efficiency and applicable to a first communication device in a communication system. Polarization directions of the first communication device include three polarization directions. The beam management method comprises: on the basis of a first polarization direction, the first communication device determines a first receive beam corresponding to the first polarization direction and a first pointing angle; and the first communication device receives a first reference signal on each receive beam among receive beams respectively corresponding to the three polarization directions at the first pointing angle, and determines a second receive beam for receiving data. The first reference signal is transmitted by a second communication device on the basis of a first transmit beam. The second receive beam corresponds to the first pointing angle and a second polarization direction, the second polarization direction is one polarization direction among the three polarization directions, and the first receive beam is a receive beam, in a first receive beam set, which has received the first reference signal with maximum signal strength.

Description

Beam management method and communication device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on February 8, 2024, with application number 202410177445.0 and application name “Beam Management Method and Communication Device”, the entire contents of which are incorporated by reference into this application. Technical Field

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

[0003] In wireless communication scenarios, network devices and terminals can send and receive signals through antennas to communicate. Signals can be propagated by radiating electromagnetic waves from the antenna. In this case, the electric field direction of the electromagnetic waves radiated by the antenna can be used as the polarization direction of the antenna. For network devices and terminals, the polarization direction of the antenna can be single-polarized or dual-polarized, that is, the antenna is a single-polarized antenna or a dual-polarized antenna. In this case, beam management is performed based on a single or two polarization directions, and the scenario of antennas with three polarization directions being set on the terminal and / or network device is not considered. Therefore, when antennas with three polarization directions are set on the terminal and / or network device, how to perform beam management is an urgent problem to be solved. Summary of the Invention

[0004] Embodiments of the present application provide a beam management method and a communication device, which can perform beam management when antennas with three polarization directions are provided in a terminal and / or a network device.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect, a beam management method is provided. The method is applied to a first communication device, wherein the polarization direction of the first communication device includes three polarization directions. The beam management method includes: the first communication device determines a first receive beam based on a first polarization direction. The first receive beam corresponds to a first polarization direction and a first pointing angle, where the first polarization direction is any one of the three polarization directions of the first communication device. The first communication device receives a first reference signal on each receive beam in a first receive beam set and determines a second receive beam. The first receive beam set includes receive beams corresponding to each of the three polarization directions of the first communication device at a first pointing angle, wherein the first reference signal is transmitted by the second communication device on a first transmit beam. The second receive beam is used for the first communication device to receive data, and is the receive beam in the first receive beam set that receives the first reference signal with the highest signal strength. The second receive beam has a pointing angle of the first pointing angle, and a polarization direction of the second receive beam is a second polarization direction, where the second polarization direction is one of the three polarization directions.

[0007] Based on the beam management method provided in the first aspect, the first communication device can determine a first receiving beam with a pointing angle of a first angle in one polarization direction, such as the above-mentioned first polarization direction, and receive a reference signal on the receiving beams corresponding to the three polarization directions of the first communication device at the first pointing angle to determine a second receiving beam. The second receiving beam is a beam with the first pointing angle and the polarization direction of the receiving beam with the largest signal strength of the first reference signal received among the receiving beams in the three polarization directions, that is, a receiving beam for receiving data is selected from the receiving beams in multiple polarization directions. Beam management can be performed when antennas with three polarization directions are provided in the terminal and / or network device.

[0008] In addition, the beam management method provided in the first aspect can determine a first receiving beam on a receiving beam corresponding to each of a plurality of polarization angles in a polarization direction, and determine a second receiving beam based on a receiving beam receiving a reference signal corresponding to different polarization directions at the first pointing angle. In this way, the polarization direction of the receiving beam can be matched with the direction of the signal, thereby improving communication efficiency, and avoiding the first communication device receiving reference signals on all receiving beams, reducing the complexity of the beam management process, and thus reducing resource overhead.

[0009] It should be understood that, unless otherwise specified, the “first communication device” in this application may refer to the terminal itself, or to a component in the terminal (e.g., a processor, a chip, or a chip system, etc.), or it may be a logic module or software that can implement all or part of the terminal functions. Alternatively, the “first communication device” in this application may refer to the network device itself, or to a component in the network device (e.g., a processor, a chip, or a chip system, etc.), or it may be a logic module or software that can implement all or part of the network device functions. Similarly, the “second communication device” in this application may refer to the terminal itself, or to a component in the terminal (e.g., a processor, a chip, or a chip system, etc.), or it may be a logic module or software that can implement all or part of the terminal functions. Alternatively, the “second communication device” in this application may refer to the network device itself, or to a component in the network device (e.g., a processor, a chip, or a chip system, etc.), or it may be a logic module or software that can implement all or part of the network device functions, which will not be described in detail later.

[0010] In one possible implementation, determining a first receive beam based on a first polarization direction includes: a first communication device receiving a second reference signal on each receive beam in a second receive beam set, and determining the first receive beam. The second receive beam set includes receive beams corresponding to multiple directional angles in the first polarization direction, the second reference signal is transmitted by the second communication device on a second transmit beam, and the first receive beam is a receive beam in the second receive beam set. In this way, the first receive beam can be selected from multiple receive beams with different directional angles. Since the directional angle of the second receive beam is the same as the directional angle of the first receive beam, the directional angle of the second receive beam can be matched with the direction of the signal, thereby further improving communication efficiency.

[0011] It should be understood that the first receiving beam may be a receiving beam in the second receiving beam set that receives the second reference signal with the highest signal strength.

[0012] In a possible implementation scheme, the beam management method provided in the first aspect may further include: the first communication device receives the first information. The first information is used to indicate that a second reference signal is received on a receiving beam corresponding to each of multiple pointing angles in the same polarization direction. The first communication device receives the second reference signal on each receiving beam in the second receiving beam set and determines the first receiving beam, including: the first communication device receives the second reference signal on each receiving beam in the second receiving beam set according to the first information, and determines the first receiving beam. In this way, the process of receiving the second reference signal and determining the first receiving beam can be triggered by the second communication device, which can improve the flexibility of the beam management process.

[0013] In one possible implementation, before the first communication device receives the second reference signal on each receive beam in the second receive beam set and determines the first receive beam, the beam management method provided in the first aspect may further include: the first communication device transmitting second information. The second information is used to indicate that the second reference signal is to be transmitted on a transmit beam. In this way, the process of receiving the second reference signal and determining the first receive beam can be triggered by the first communication device, thereby improving the flexibility of the beam management process.

[0014] In one possible implementation, the beam management method provided in the first aspect may further include: the first communication device receives a third reference signal on a third receive beam and determines a third transmit beam. The third reference signal is transmitted by the second communication device on each transmit beam in the first transmit beam set, and the third transmit beam is a transmit beam in the first transmit beam set. That is, the first communication device can receive reference signals transmitted on different transmit beams of the second communication device on one receive beam, such as the third reference signal mentioned above. In this way, the first communication device can obtain the signal strength of the third reference signal transmitted on different transmit beams of the second communication device, thereby determining the transmit beam used by the second communication device to transmit data.

[0015] It can be understood that the first communication device can indicate the third transmission beam to the second communication device.

[0016] In one possible implementation, the beam management method provided in the first aspect may further include: the first communication device receiving third information. The third information is used to indicate reception of a third reference signal on a receive beam. The first communication device receiving the third reference signal on a third receive beam and determining a third transmit beam includes: the first communication device receiving the third reference signal on the third receive beam based on the third information and determining the third transmit beam. In this manner, the process of receiving the fourth reference signal can be triggered by the second communication device, thereby improving the flexibility of beam management.

[0017] In one possible implementation, before the first communication device receives the third reference signal on the third receive beam and determines the third transmit beam, the beam management method provided in the first aspect may further include: the first communication device transmitting fourth information. The fourth information is used to instruct the third reference signal to be transmitted on transmit beams corresponding to multiple pointing angles. In this way, the process of receiving the third reference signal can be triggered by the first communication device, thereby improving the flexibility of beam management.

[0018] In a possible implementation scheme, the beam management method provided in the first aspect may also include: the first communication device receives a fourth reference signal on a fourth receiving beam and determines a fourth transmitting beam. The fourth reference signal is sent by the second communication device on each transmitting beam in the second transmitting beam set, and the second transmitting beam set includes: transmitting beams corresponding to multiple pointing angles in the same polarization direction of the second communication device, and the fourth transmitting beam corresponds to the second pointing angle. That is, the first communication device can receive a reference signal sent by the second communication device on a transmitting beam corresponding to multiple pointing angles in the same polarization direction on a receiving beam, such as the fourth reference signal mentioned above. In this way, the first communication device can obtain the signal quality of the transmitting beams of the second communication device at different pointing angles, and thus can determine the fourth transmitting beam whose pointing angle matches the direction of the signal.

[0019] In one possible implementation, the beam management method provided in the first aspect may further include: a first communication device receiving fifth information. The fifth information is used to indicate reception of a fourth reference signal on a receive beam. The first communication device receiving the fourth reference signal on a fourth receive beam and determining a fourth transmit beam may include: the first communication device receiving the fourth reference signal on the fourth receive beam based on the fifth information and determining the fourth transmit beam. In this manner, the process of receiving the fourth reference signal and determining the fourth transmit beam can be triggered by the second communication device, thereby improving the flexibility of beam management.

[0020] In one possible implementation, before the first communication device receives the fourth reference signal on the fourth receive beam and determines the fourth transmit beam, the beam management method provided in the first aspect may further include: the first communication device transmitting sixth information. The sixth information is used to instruct the fourth reference signal to be transmitted on transmit beams corresponding to multiple pointing angles in the same polarization direction. In this way, the process of receiving the fourth reference signal and determining the fourth transmit beam can be triggered by the first communication device, thereby improving the flexibility of beam management.

[0021] In a possible implementation scheme, the beam management method provided in the first aspect may also include: the first communication device receives a fifth reference signal on the fifth receiving beam and determines the fifth transmitting beam. The fifth reference signal is sent by the second communication device on each transmitting beam in the third transmitting beam set, and the third transmitting beam set includes: transmitting beams corresponding to the three polarization directions of the second communication device at the second pointing angle, and the fifth transmitting beam is a transmitting beam in the third transmitting beam set. That is, the first communication device can receive the reference signal sent by the second communication device on the transmitting beam corresponding to the three polarization directions of the second communication device at the second pointing angle on a receiving beam, such as the fifth reference signal mentioned above. In this way, the first communication device can obtain the signal quality of each transmitting beam corresponding to different polarization directions at the first pointing angle, so as to determine the fifth transmitting beam whose polarization direction and pointing angle match the direction of the signal, thereby further improving the communication quality.

[0022] In one possible implementation, the beam management method provided in the first aspect may further include: the first communication device receiving seventh information. The seventh information is used to indicate reception of a fifth reference signal on a receive beam. The first communication device receiving the fifth reference signal on a fifth receive beam and determining a fifth transmit beam, including: the first communication device receiving the fifth reference signal on the fifth receive beam based on the seventh information and determining the fifth transmit beam. In this manner, the process of receiving and determining the fifth reference signal can be triggered by the second communication device, thereby improving the flexibility of beam management.

[0023] In one possible implementation, before the first communication device receives the fifth reference signal on the fifth receive beam and determines the fifth transmit beam, the beam management method provided in the first aspect may further include: the first communication device transmitting eighth information. The eighth information is used to instruct the fifth reference signal to be transmitted on transmit beams corresponding to each of the three polarization directions at the same pointing angle. In this way, the process of receiving and determining the fifth reference signal can be triggered by the first communication device, thereby improving the flexibility of beam management.

[0024] In a possible implementation scheme, the beam management method provided in the first aspect may further include: the first communication device sends ninth information. The ninth information is used to indicate the number of receiving antennas on the first communication device and the number of polarization directions of the receiving antennas on the first communication device. The first communication device receives tenth information. The tenth information is determined by the second communication device based on the ninth information, and the tenth information is used to indicate the pointing angle and the number of polarization directions of the receiving beam for beam management by the first communication device. In this way, the second communication device can configure the pointing angle and the number of polarization directions of the receiving beam for beam management by the first communication device for the first communication device based on the number of polarization directions of the receiving antennas on the first communication device, thereby improving flexibility.

[0025] In a possible implementation, the ninth information is also used to indicate beam configuration.

[0026] In a possible implementation scheme, the beam management method provided in the first aspect may further include: the first communication device receives eleventh information. The eleventh information is used to indicate the number of transmitting antennas on the second communication device and the number of polarization directions of the transmitting antennas on the second communication device. The first communication device sends twelfth information. The twelfth information is determined based on the eleventh information, and the twelfth information is used to indicate the pointing angle and the number of polarization directions of the transmitting beam for beam management by the second communication device. In this way, the first communication device can configure the pointing angle and the number of polarization directions of the transmitting beam for beam management by the second communication device for the second communication device based on the number of polarization directions of the receiving antennas on the second communication device, thereby improving flexibility.

[0027] In a possible implementation, the eleventh information is also used to indicate beam configuration.

[0028] In a second aspect, a beam management method is provided, applied to a first communication device. The polarization direction of the first communication device includes three polarization directions. The beam management method includes: the first communication device transmitting a first reference signal on each transmit beam in a first transmit beam set. The first transmit beam set includes: transmit beams corresponding to multiple pointing angles in a first polarization direction, where the first polarization direction is one of the three polarization directions of the first communication device. The first communication device receives first information. The first information indicates a first transmit beam, which is determined by a second communication device based on the first reference signal. The first transmit beam is one of the transmit beams in the first transmit beam set, and the angle of the first transmit beam is a first pointing angle. The first communication device transmits a second reference signal on each transmit beam in a second transmit beam set. The second transmit beam set includes: transmit beams corresponding to the three polarization directions of the first communication device at the first pointing angle. The first communication device receives second information. The second information is used to indicate the second transmission beam. The second transmission beam is determined by the second communication device based on the first reference signal and the second reference signal. The second transmission beam is the transmission beam with the largest received signal strength of the second reference signal sent in the second transmission beam set. The second transmission beam is used by the first communication device to send signals.

[0029] Based on the beam management method provided by the second aspect, the first communication device can send a first reference signal on the transmitting beams corresponding to the multiple pointing angles in the first polarization direction to determine the first transmitting beam, and send a second reference signal on the transmitting beams corresponding to the pointing angles of the first transmitting beam and the three polarization directions, so as to obtain the second transmitting beam, that is, select the transmitting beam from the transmitting beams in multiple polarization directions, and perform beam management when antennas in three polarization directions are set in the terminal and / or network equipment.

[0030] In addition, the beam management method provided in the second aspect can send a first reference signal on a transmitting beam corresponding to a polarization direction and multiple pointing angles, and send a second reference signal on a transmitting beam corresponding to a pointing angle and three polarization directions, which can avoid the first communication device sending reference signals on all transmitting beams. In this way, the polarization direction of the transmitting beam can be matched with the signal, thereby improving communication efficiency, reducing the complexity of the beam management process, and thus reducing resource overhead.

[0031] In one possible implementation, the beam management method provided in the second aspect may further include: the first communication device receives third information. The third information is used to indicate that a first reference signal is transmitted on a transmission beam corresponding to each of multiple pointing angles in the same polarization direction. The first communication device transmits the first reference signal on each transmission beam in the first transmission beam set, including: the first communication device transmits the first reference signal on each transmission beam in the first transmission beam set according to the third information. In this way, the process of sending the first reference signal can be triggered by the second communication device, which can improve the flexibility of the beam management process.

[0032] In one possible implementation, before the first communication device transmits the first reference signal on each transmit beam in the first transmit beam set, the beam management method provided in the second aspect may further include: the first communication device transmitting fourth information. The fourth information is used to indicate that the first reference signal is to be received on a receive beam. In this way, the first communication device can trigger the process of transmitting the first reference signal, thereby improving the flexibility of the beam management process.

[0033] In one possible implementation, the beam management method provided in the second aspect may further include: the first communication device transmitting a third reference signal on a third transmit beam. The third reference signal is used to determine the receive beam used by the second communication device to receive data. That is, the first communication device may transmit a reference signal, such as the third reference signal described above, on a transmit beam. This allows the second communication device to obtain the signal strength of the third reference signal transmitted on a transmit beam across different receive beams, thereby determining the receive beam used by the second communication device to receive data.

[0034] In one possible implementation, the beam management method provided in the second aspect may further include: a first communication device receiving fifth information. The fifth information is used to indicate that a third reference signal is to be transmitted on a transmit beam. The first communication device transmitting the third reference signal on a third transmit beam includes: the first communication device transmitting the third reference signal on the third transmit beam based on the fifth information. In this way, the process of transmitting the third reference signal can be triggered by the second communication device, thereby improving the flexibility of beam management.

[0035] In one possible implementation, before the first communications device transmits the third reference signal on the third transmit beam, the beam management method provided in the second aspect may further include: the first communications device transmitting sixth information. The sixth information is used to indicate that the third reference signal is to be received on multiple receive beams. In this manner, the first communications device can trigger the process of transmitting the third reference signal, thereby improving the flexibility of beam management.

[0036] In one possible implementation, the beam management method provided in the second aspect may further include: the first communication device transmitting a fourth reference signal on a fourth transmit beam. The fourth reference signal is used to determine the directionality angle of the receive beam used by the second communication device to receive data. That is, the first communication device may transmit the fourth reference signal on a single transmit beam. This allows the first communication device to obtain the signal strength of the fourth reference signal received on receive beams of the second communication device at different directionality angles, thereby determining the transmit beam whose directionality matches the signal direction.

[0037] In one possible implementation, the beam management method provided in the second aspect may further include: a first communication device receiving seventh information. The seventh information is used to indicate that a fourth reference signal is to be transmitted on a transmit beam. Transmitting the fourth reference signal on a fourth transmit beam includes: transmitting the fourth reference signal on the fourth transmit beam based on the seventh information. In this manner, the process of transmitting the fourth reference signal can be triggered by the second communication device, thereby improving the flexibility of beam management.

[0038] In one possible implementation, before transmitting the fourth reference signal on the fourth transmit beam, the beam management method provided in the second aspect may further include: the first communication device transmitting eighth information. The eighth information is used to indicate that the fourth reference signal is to be received on receive beams corresponding to multiple pointing angles in the same polarization direction. In this way, the process of transmitting the fourth reference signal can be triggered by the first communication device, thereby improving the flexibility of beam management.

[0039] In one possible implementation, the beam management method provided in the second aspect may further include: the first communication device transmitting a fifth reference signal on a fifth transmit beam, wherein the fifth reference signal is used to determine the polarization direction of a receive beam used by the second communication device to receive data.

[0040] In one possible implementation, the beam management method provided in the second aspect may further include: a first communication device receiving ninth information. The ninth information is used to indicate that a fifth reference signal is to be transmitted on a transmit beam. The first communication device transmitting the fifth reference signal on a fifth transmit beam includes: the first communication device transmitting the fifth reference signal on the fifth transmit beam based on the ninth information. In this manner, the second communication device can trigger the process of transmitting the fifth reference signal, thereby improving the flexibility of beam management.

[0041] In one possible implementation, before the first communication device transmits the fifth reference signal on the fifth transmit beam, the beam management method provided in the second aspect may further include: the first communication device transmitting tenth information. The tenth information is used to instruct reception of the fifth reference signal on receive beams corresponding to the three polarization directions of the second communication device at the same pointing angle. In this way, the process of transmitting the fifth reference signal can be triggered by the first communication device, thereby improving the flexibility of beam management.

[0042] In a possible implementation scheme, the beam management method provided in the second aspect may further include: the first communication device sends eleventh information. The eleventh information is used to indicate the number of transmitting antennas on the first communication device and the number of polarization directions of the transmitting antennas on the first communication device. The first communication device receives twelfth information. The twelfth information is determined based on the eleventh information, and the twelfth information is used to indicate the pointing angle and the number of polarization directions of the transmitting beam for beam management by the first communication device. In this way, the second communication device can configure the pointing angle and the number of polarization directions of the transmitting beam for beam management by the first communication device according to the number of polarization directions of the transmitting antennas on the first communication device, thereby improving flexibility.

[0043] In a possible implementation, the eleventh information is also used to indicate beam configuration.

[0044] In a possible implementation scheme, the beam management method provided in the second aspect may further include: the first communication device receives thirteenth information. The thirteenth information is used to indicate the number of receiving antennas on the second communication device and the number of polarization directions of the receiving antennas on the second communication device. The first communication device sends fourteenth information. The fourteenth information is determined based on the thirteenth information, and the fourteenth information is used to indicate the pointing angle and the number of polarization directions of the transmitting beam for beam management by the first communication device. In this way, the first communication device can configure the pointing angle and the number of polarization directions of the receiving beam for beam management by the second communication device according to the number of polarization directions of the receiving antennas on the first communication device, thereby improving flexibility.

[0045] In a possible implementation, the thirteenth information is also used to indicate beam configuration.

[0046] In a third aspect, a beam management method is provided. The beam management method includes: a second communication device receiving a first reference signal on a first receive beam and determining a first transmit beam. The first reference signal is transmitted by the first communication device on each transmit beam in a first transmit beam set. The first transmit beam set includes transmit beams corresponding to multiple pointing angles in a first polarization direction, where the first polarization direction is one of the three polarization directions of the first communication device. The first transmit beam is a transmit beam in the first transmit beam set, and the angle of the first transmit beam is a first pointing angle. The second communication device transmits first information. The first information indicates the first transmit beam. The second communication device receives a second reference signal on a second receive beam and determines a second transmit beam. The second reference signal is transmitted by the first communication device on each transmit beam in a second transmit beam set. The second transmit beam set includes transmit beams corresponding to the three polarization directions of the first communication device in a first pointing angle. The second transmit beam is the transmit beam in the second transmit beam set that has the highest received signal strength of the second reference signal, and the second transmit beam is used for signal transmission by the first communication device. The second communication device transmits second information. The second information is used to indicate a second transmit beam.

[0047] Based on the beam management method provided by the third aspect, the second communication device can receive on a receiving beam a first reference signal sent on a transmitting beam corresponding to each of the first polarization direction and multiple pointing angles to determine the first transmitting beam, and receive on a receiving beam a second reference signal sent on a beam corresponding to each of the three polarization directions with the same pointing angle, thereby obtaining a second transmitting beam, that is, selecting a transmitting beam from transmitting beams in multiple polarization directions, and beam management can be performed when antennas in three polarization directions are provided in the terminal and / or network equipment.

[0048] In addition, the beam management method provided in the third aspect can receive a first reference signal on a receiving beam and a second reference signal on a receiving beam, and can match the polarization direction of the transmitting beam with the polarization direction of the signal, thereby improving communication efficiency and reducing the complexity of the beam management process, thereby reducing resource overhead.

[0049] In one possible implementation, before the second communication device receives the first reference signal on the first receive beam and determines the first transmit beam, the beam management method provided in the third aspect may further include: the second communication device transmitting third information. The third information is used to indicate that the first reference signal is received on transmit beams corresponding to multiple pointing angles in the same polarization direction.

[0050] In one possible implementation, the beam management method provided in the third aspect may further include: a second communication device receiving fourth information. The fourth information indicates reception of a first reference signal on a receive beam. The second communication device receiving the first reference signal on the first receive beam and determining a first transmit beam includes: the second communication device receiving the first reference signal on the first receive beam based on the fourth information and determining the first transmit beam.

[0051] In one possible implementation, the beam management method provided in the third aspect may further include: the second communication device receiving a third reference signal on each receive beam in the first receive beam set, and determining the third receive beam. The first receive beam set includes multiple receive beams. The third reference signal is transmitted by the first communication device on the third transmit beam.

[0052] In one possible implementation, before the second communication device receives the third reference signal on each receive beam in the first receive beam set and determines the third receive beam, the beam management method provided in the third aspect may further include: the second communication device transmitting fifth information. The fifth information is used to indicate that the third reference signal is to be transmitted on a transmit beam.

[0053] In one possible implementation, the beam management method provided in the third aspect may further include: a second communication device receiving sixth information. The sixth information is used to indicate reception of a third reference signal on multiple receive beams. The second communication device receiving the third reference signal on each receive beam in the first receive beam set and determining the third receive beam includes: the second communication device receiving the third reference signal on each receive beam in the first receive beam set based on the sixth information, and determining the third receive beam.

[0054] In one possible implementation, the beam management method provided in the third aspect may further include: the second communication device receiving a fourth reference signal on the second receive beam set, and determining a fourth receive beam. The fourth receive beam is a receive beam corresponding to multiple pointing angles in the same polarization direction. The fourth receive beam is a beam in the second receive beam set. The pointing angle of the fourth receive beam is the first pointing angle.

[0055] In one possible implementation, before the second communication device receives the fourth reference signal on the second receive beam set and determines the fourth receive beam, the beam management method provided in the third aspect may further include: the second communication device transmitting seventh information. The seventh information is used to indicate that the fourth reference signal is to be transmitted on a transmit beam.

[0056] In one possible implementation, the beam management method provided in the third aspect may further include: a second communication device receiving eighth information. The eighth information is used to indicate reception of a fourth reference signal on receive beams corresponding to each of multiple pointing angles in the same polarization direction. The second communication device receiving the fourth reference signal on the second receive beam set and determining the fourth receive beam includes: the second communication device receiving the fourth reference signal on the second receive beam set based on the eighth information and determining the fourth receive beam.

[0057] In one possible implementation, the beam management method provided in the third aspect may further include: the second communication device receiving a fifth reference signal on a third receive beam set and determining a fifth receive beam. The third receive beam set includes multiple receive beams corresponding to the three polarization directions of the second communication device at the first pointing angle. The fifth reference signal is transmitted by the first communication device on the fifth transmit beam. The fifth receive beam is the receive beam in the third receive beam set that receives the fifth reference signal with the highest signal strength.

[0058] In one possible implementation, before the second communication device receives the fifth reference signal on the third receive beam set and determines the fifth receive beam, the beam management method provided in the third aspect may further include: the second communication device transmitting ninth information. The ninth information is used to indicate that five reference signals are to be transmitted on one transmit beam.

[0059] In one possible implementation, the beam management method provided in the third aspect may further include: the second communication device receiving tenth information. The tenth information is used to indicate reception of a fifth reference signal on receive beams corresponding to each of the three polarization directions of the second communication device at the same pointing angle. The second communication device receiving the fifth reference signal on the third receive beam set and determining the fifth receive beam includes: the second communication device receiving the fifth reference signal on the third receive beam set according to the tenth information and determining the fifth receive beam.

[0060] In one possible implementation, the beam management method provided in the third aspect may further include: the second communication device receiving eleventh information. The eleventh information indicates the number of transmit antennas on the first communication device and the number of polarization directions of the transmit antennas on the first communication device. The second communication device transmits twelfth information. The twelfth information is determined based on the eleventh information and indicates the pointing angle and number of polarization directions of the transmit beam for beam management by the first communication device.

[0061] In a possible implementation, the eleventh information is also used to indicate beam configuration.

[0062] In one possible implementation, the beam management method provided in the third aspect may further include: the second communication device transmitting thirteenth information. The thirteenth information indicates the number of receive antennas on the second communication device and the number of polarization directions of the receive antennas on the second communication device. The second communication device receives fourteenth information. The fourteenth information is determined based on the thirteenth information and indicates the pointing angle and number of polarization directions of the transmit beam for beam management by the first communication device.

[0063] In a possible implementation, the thirteenth information is also used to indicate beam configuration.

[0064] Regarding the technical effects of the method provided in the third aspect, reference may be made to the technical effects of the method provided in the second aspect, which will not be repeated here.

[0065] In a fourth aspect, a communication device is provided, which is configured to execute the method described in any one of the implementations of the first to third aspects.

[0066] In the present application, the communication device described in the fourth aspect can be a terminal or a network device, or a chip (system) or other parts or components that can be set in the terminal or network device, or a device that includes the terminal or network device.

[0067] It should be understood that the communication device described in the fourth aspect includes a module, unit, or means corresponding to the method described in any one of the first to third aspects above. The module, unit, or means can be implemented by hardware, software, or hardware executing the corresponding software implementation. The hardware or software includes one or more modules or units for performing the functions involved in the above method.

[0068] In a fifth aspect, a communication device is provided, comprising: a processor configured to execute the method described in any possible implementation of the first to third aspects.

[0069] In one possible implementation, the communication device described in the fifth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the fifth aspect to communicate with other communication devices.

[0070] In one possible implementation, the communication device described in the fifth aspect may further include a memory. The memory may be integrated with the processor or provided separately. The memory may be used to store the computer program and / or data involved in the method described in any one of aspects 1 to 3.

[0071] In the present application, the communication device described in the fifth aspect can be a terminal or a network device, or a chip (system) or other parts or components that can be set in the terminal or network device, or a device that includes the terminal or network device.

[0072] In a sixth aspect, a communication device is provided, comprising: a processor coupled to a memory, the processor configured to execute a computer program stored in the memory, so that the communication device performs the method described in any possible implementation of the first to third aspects.

[0073] In one possible implementation, the communication device described in the sixth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the sixth aspect to communicate with other communication devices.

[0074] In the present application, the communication device described in the sixth aspect may be a terminal or a network device, or a chip (system) or other parts or components that can be set in the terminal or network device, or a device that includes the terminal or network device.

[0075] In the seventh aspect, a communication device is provided, comprising: a processor and a memory; the memory is used to store a computer program, and when the processor executes the computer program, the communication device executes the method described in any one of the implementation methods of the first to third aspects.

[0076] In one possible implementation, the communication device described in the seventh aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the seventh aspect to communicate with other communication devices.

[0077] In the present application, the communication device described in the seventh aspect can be a terminal or a network device, or a chip (system) or other parts or components that can be set in the terminal or network device, or a device that includes the terminal or network device.

[0078] In an eighth aspect, a communication device is provided, comprising: a processor; the processor is used to couple with a memory, and after reading a computer program in the memory, execute the method described in any one of the implementation methods of the first to third aspects according to the computer program.

[0079] In a possible implementation, the communication device described in the eighth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the eighth aspect to communicate with other communication devices.

[0080] In the present application, the communication device described in the eighth aspect can be a terminal or a network device, or a chip (system) or other parts or components that can be set in the terminal or network device, or a device that includes the terminal or network device.

[0081] In a ninth aspect, a processor is provided, wherein the processor is configured to execute the method described in any possible implementation of the first to third aspects.

[0082] In a tenth aspect, a communication system is provided, which includes one or more terminals and one or more network devices.

[0083] In the eleventh aspect, a computer-readable storage medium is provided, comprising: a computer program or instructions; when the computer program or instructions are run on a computer, the computer executes the method described in any possible implementation method of the first to third aspects.

[0084] In the twelfth aspect, a computer program product is provided, comprising a computer program or instructions, which, when executed on a computer, enables the computer to execute the method described in any one of the possible implementations of the first to third aspects.

[0085] In addition, the technical effects of the communication devices described in the fourth to twelfth aspects above can refer to the technical effects of the methods described in the first to third aspects above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0086] FIG1 is a schematic diagram of an electromagnetic field provided in an embodiment of the present application;

[0087] FIG2 is a schematic diagram showing the relationship between the signal transmission direction and the polarization direction provided in an embodiment of the present application;

[0088] FIG3 is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0089] FIG4 is a schematic diagram of the connection relationship between antenna channels and antennas provided in an embodiment of the present application;

[0090] FIG5 is a first schematic diagram illustrating the correspondence between antenna channels and antennas with different polarization directions provided in an embodiment of the present application;

[0091] FIG6 is a second schematic diagram of the correspondence between antenna channels and antennas with different polarization directions provided in an embodiment of the present application;

[0092] FIG7 is a third schematic diagram of the correspondence between antenna channels and antennas with different polarization directions provided in an embodiment of the present application;

[0093] FIG8 is a fourth schematic diagram of the correspondence between antenna channels and antennas with different polarization directions provided in an embodiment of the present application;

[0094] FIG9 is a schematic diagram of a protocol architecture between a network device and a terminal according to an embodiment of the present application;

[0095] FIG10 is a schematic diagram of a flow chart of a beam management method provided in an embodiment of the present application;

[0096] FIG11 is a flow chart of another beam management method provided in an embodiment of the present application;

[0097] FIG12 is a flow chart of another beam management method provided in an embodiment of the present application;

[0098] FIG13 is a flow chart of another beam management method provided in an embodiment of the present application;

[0099] FIG14 is a flow chart of another beam management method provided in an embodiment of the present application;

[0100] FIG15 is a flow chart of another beam management method provided in an embodiment of the present application;

[0101] FIG16 is a flow chart of another beam management method provided in an embodiment of the present application;

[0102] FIG17 is a flow chart of another beam management method provided in an embodiment of the present application;

[0103] FIG18 is a schematic diagram of a flow chart of another beam management method provided in an embodiment of the present application;

[0104] FIG19 is a flow chart of another beam management method provided in an embodiment of the present application;

[0105] FIG20 is a flow chart of another beam management method provided in an embodiment of the present application;

[0106] FIG21 is a schematic diagram of a flow chart of another beam management method provided in an embodiment of the present application;

[0107] FIG22 is a flow chart of another beam management method provided in an embodiment of the present application;

[0108] FIG23 is a flow chart of another beam management method provided in an embodiment of the present application;

[0109] FIG24 is a flow chart of another beam management method provided in an embodiment of the present application;

[0110] FIG25 is a flow chart of another beam management method provided in an embodiment of the present application;

[0111] FIG26 is a flow chart of another beam management method provided in an embodiment of the present application;

[0112] FIG27 is a flow chart of another beam management method provided in an embodiment of the present application;

[0113] FIG28 is a flow chart of another beam management method provided in an embodiment of the present application;

[0114] FIG29 is a flow chart of another beam management method provided in an embodiment of the present application;

[0115] FIG30 is a first structural diagram of a communication device provided in an embodiment of the present application;

[0116] Figure 31 is a second structural diagram of the communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0117] The technical terms and related technical solutions in this application will be described below in conjunction with the accompanying drawings.

[0118] Electromagnetic waves are generated by alternating currents flowing through conductors. The principle of generation is as follows: As shown in Figure 1(a), when an alternating current flows through a conductor, an alternating electric field is generated around the conductor. This alternating magnetic field, in turn, generates an alternating electric field, which in turn generates an alternating magnetic field, which in turn generates an alternating electric field, and so on. In this way, the alternating electric and magnetic fields continuously transform into each other, forming an electromagnetic field. In an electromagnetic field, the electric field, magnetic field, and direction of electromagnetic wave propagation are perpendicular to each other. As shown in Figure 1(b), assuming a three-dimensional coordinate system with perpendicular x-, y-, and z-axes, if the electric field is parallel to the x-axis and the magnetic field is parallel to the y-axis, then the direction of the electric field changes according to a certain pattern as the electromagnetic wave propagates through space. This phenomenon is called the polarization of the electromagnetic wave. The direction of the electric field of an electromagnetic wave is called its polarization. Polarization is a radiation characteristic of an electromagnetic wave's field strength vector. The spatial orientation of the electric field vector can be used to define the polarization direction of an electromagnetic wave. For electromagnetic waves generated by an antenna, the polarization direction refers to the electric field vector in the direction of radiation where the antenna's signal strength is greatest. If the electric field of an electromagnetic wave is perpendicular to the ground, it is called a vertically polarized wave; if the electric field is parallel to the ground, it is called a horizontally polarized wave.

[0119] In wireless communication scenarios, network devices and terminals can transmit and receive signals via antennas. Signals propagate via electromagnetic waves radiated by the antenna. In this case, the direction of the electric field of the electromagnetic waves radiated by the antenna can be used as the polarization direction of the antenna. The polarization direction of the antenna can be single-polarized, meaning the antenna is a single-polarized antenna. For example, if the direction of the electric field of the electromagnetic waves radiated by the antenna includes a vertical direction, then the polarization direction of the antenna is vertical. For another example, if the direction of the electromagnetic waves radiated by the antenna includes a horizontal direction, then the polarization direction of the antenna is horizontal. Alternatively, the polarization direction of the antenna can be dual-polarized, meaning the antenna is a dual-polarized antenna. For example, if the direction of the electromagnetic waves radiated by the antenna includes both a horizontal and a vertical direction, then the polarization direction of the antenna is horizontal and vertical. It should be understood that the polarization direction of the antenna can also be other polarization directions besides horizontal and vertical polarization. For example, the polarization direction of the antenna can be +45 degrees and / or -45 degrees.

[0120] In wireless communication scenarios, beam management is performed based on a single or two polarization directions, and does not consider scenarios where antennas with three polarization directions are set on terminals and / or network devices. Therefore, when antennas with three polarization directions are set on terminals and / or network devices, how to perform beam management is an urgent problem to be solved.

[0121] Among them, when the polarization direction of one end receiving the signal does not match the direction of signal propagation, low transmission efficiency will result. Taking downlink transmission as an example, for example, if the propagation path between the network device and the terminal is line of sight (LOS), as shown in Figure 2, the polarization direction of the terminal includes polarization direction 1 and polarization direction 2. If the signal transmission direction does not match polarization direction 1 or polarization direction 2, the terminal's received signal strength is low and the signal-to-noise ratio is low, which will lead to low communication efficiency. For another example, if the propagation path between the network device and the terminal includes non-line of sight (NLOS), the polarization direction of the signal sent by the network device may change when it reaches the terminal, resulting in low received signal strength and low signal-to-noise ratio at the terminal, which will lead to low communication efficiency.

[0122] The technical solution in this application will be described below with reference to the accompanying drawings.

[0123] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as wireless fidelity (WiFi) systems, vehicle to everything (V2X) communication systems, device-to-device (D2D) communication systems, Internet of Vehicles communication systems, 4th generation (4G) mobile communication systems, such as long term evolution (LTE) systems, world-wide interoperability for microwave access (WiMAX) communication systems, fifth generation (5G) mobile communication systems, such as new radio (NR) systems, and future communication systems, such as sixth generation (6G) mobile communication systems.

[0124] This application will present various aspects, embodiments, or features in the context of systems that may include multiple devices, components, modules, etc. It should be understood and appreciated that each system may include additional devices, components, modules, etc., and / or may not include all of the devices, components, modules, etc. discussed in conjunction with the figures. Furthermore, combinations of these aspects may also be used.

[0125] Additionally, in the embodiments of this application, words such as "exemplarily" and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as an "exemplary" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of the word "exemplary" is intended to present concepts in a concrete manner.

[0126] First, in this application, "used to indicate" can include being used for direct indication and being used for indirect indication. When describing a certain "information" as being used to indicate A, it can include whether the information directly indicates A or indirectly indicates A, but it does not necessarily mean that the information contains A.

[0127] The information indicated by a message is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, where there is an association between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information can be achieved by means of the arrangement order of each piece of information agreed in advance (such as specified in the protocol), thereby reducing the indication overhead to a certain extent. At the same time, the common parts of each piece of information can be identified and indicated uniformly to reduce the indication overhead caused by indicating the same information separately.

[0128] In addition, the specific indication method can also be various existing indication methods, such as but not limited to the above-mentioned indication methods and various combinations thereof. The specific details of the various indication methods can be referred to the prior art and will not be repeated herein. As can be seen from the above, for example, when it is necessary to indicate multiple information of the same type, there may be a situation where the indication methods for different information are different. In the specific implementation process, the required indication method can be selected according to specific needs. The embodiment of the present application does not limit the selected indication method. In this way, the indication method involved in the embodiment of the present application should be understood to cover various methods that can enable the party to be indicated to obtain the information to be indicated.

[0129] The information to be indicated can be sent as a whole, or divided into multiple sub-information and sent separately, and the sending period and / or sending time of these sub-information can be the same or different. The specific sending method is not limited in this application. Among them, the sending period and / or sending time of these sub-information can be predefined, for example, predefined according to the protocol, or configured by the transmitting device by sending configuration information to the receiving device. Among them, the configuration information can, for example, but not limited to, include one or a combination of at least two of radio resource control (RRC) signaling, medium access control (MAC) layer signaling and physical layer signaling. Among them, MAC layer signaling, for example, includes MAC control element (CE); physical (PHY) layer signaling, for example, includes downlink control information (DCI).

[0130] Second, in the embodiments shown below, the first, second, and various numerical numbers are only used for the convenience of description and are not intended to limit the scope of the embodiments of the present application.

[0131] Third, “pre-set”, or “pre-defined”, or “pre-configured” can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal and a network device), or can be pre-specified in a protocol, and this application does not limit its specific implementation method. Among them, “saving” can mean saving in one or more memories. The one or more memories can be set separately, or integrated in an encoder or decoder, a processor, or a communication device. The one or more memories can also be partially set separately, and partially integrated in a decoder, a processor, or a communication device. The type of memory can be any form of storage medium, and this application does not limit it.

[0132] Fourth, the “protocol” involved in the embodiments of the present application may refer to a standard protocol in the field of communications, for example, it may include 3GPP’s LTE protocol (such as technical specification (TS) 36, i.e., TS36 series technical specifications), NR protocol (such as TS38 series technical specifications) and related protocols used in future communication systems. This application does not limit this.

[0133] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field will know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0134] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field will know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0135] To facilitate understanding of the embodiments of the present application, a communication system applicable to the embodiments of the present application is first described in detail using the communication system shown in Figure 3 as an example. For example, Figure 3 is a schematic diagram of the architecture of a communication system applicable to the method provided in the embodiments of the present application.

[0136] As shown in FIG3 , the communication system includes network equipment and terminals.

[0137] For example, the network devices may include network devices 301a to 301c, and the terminals may include terminals 302a to 302f. The terminals may be connected to the network devices wirelessly, and the network may be connected to the core network (not shown in FIG3 ) via wired or wireless means.

[0138] Among them, network devices and terminals can interact with each other.

[0139] In one possible implementation, the terminal is provided with antennas with three polarization directions. In other words, the terminal's polarization directions include three polarization directions. For example, the terminal may be provided with an antenna with polarization direction x1, an antenna with polarization direction y1, and an antenna with polarization direction z1. In other words, the terminal's polarization directions include polarization direction x1, polarization direction y1, and polarization direction z1.

[0140] Optionally, the three polarization directions of the terminal may be perpendicular to each other. For example, the polarization direction x1, the polarization direction y1, and the polarization direction z1 are perpendicular to each other.

[0141] Among them, an analog weight adjustment module and a polarization mapping module can be set between the antenna channel and the antenna of the terminal. The analog weight adjustment module is a structure for adjusting the phase of the signal output by the channel. The specific implementation can refer to the existing structure for adjusting the phase of the antenna channel. The polarization mapping module can be used to select the antenna for communication. For example, as shown in Figure 4, the antenna channel on the terminal includes antenna channel 1 to antenna channel M, where M is a positive integer. The antenna on the terminal includes antenna 1 to antenna N, where N is a positive integer, then antenna channel 1 to antenna channel M are all connected to the analog weight adjustment module, the analog weight adjustment module is connected to the polarization mapping module, and the polarization mapping module is connected to each antenna from antenna 1 to antenna N.

[0142] In one possible implementation, each antenna channel in the terminal corresponds to an antenna with three polarization directions. For example, as shown in (a) of Figure 5 , the antenna channels in the terminal include antenna channel 1 and antenna channel 2. Antenna channel 1 corresponds to antennas 1 to 3, and antenna channel 2 corresponds to antennas 4 to 6. Antenna 1 and antenna 4 are both antennas with polarization direction x1, antenna 2 and antenna 5 are both antennas with polarization direction y1, and antenna 3 and antenna 6 are both antennas with polarization direction z1. In this case, each antenna channel can communicate using one or more of the three polarization directions of the antenna channel.

[0143] In one possible implementation, the two antenna channels in the terminal correspond to antennas in three polarization directions. For example, as shown in (b) of Figure 5 , the antenna channels in the terminal include antenna channel 1 and antenna channel 2. Antenna channel 1 and antenna channel 2 together correspond to polarization direction x1, polarization direction y1, and polarization direction z1. For example, antenna channel 1 and antenna channel 2 together correspond to antennas 1 to 3. In this case, of the two antenna channels corresponding to the three antennas in the three polarization directions, one antenna channel can use one of the three polarization directions corresponding to the two antenna channels for communication, and the other antenna channel can use the remaining antennas in the three polarization directions corresponding to the two antenna channels for communication. For example, if antenna channel 1 uses an antenna in polarization direction x1 for communication, then antenna channel 2 can use an antenna in polarization direction y1 and / or an antenna in polarization direction z1 for communication.

[0144] Similar to the antennas and channels in the terminal, the network device is equipped with antennas with three polarization directions. In other words, the polarization direction of the network includes three polarization directions. For example, an antenna with polarization direction x1, an antenna with polarization direction y1, and an antenna with polarization direction z2 can be set in the network. In other words, the polarization directions of the network device include polarization direction x1, polarization direction y1, and polarization direction z1. Optionally, the three polarization directions of the network device can be perpendicular to each other. Polarization direction x1, polarization direction y1, and polarization direction z1 are perpendicular to each other. An analog weight adjustment module and a polarization mapping mode can also be set between the antenna channel and the antenna of the network device, which will not be described in detail here.

[0145] It should be understood that the three polarization directions of the network device can be different from the three polarization directions of the terminal. For example, the three polarization directions of the network device may include: polarization direction x2, polarization direction y2, and polarization direction z2. In one possible implementation, each antenna channel in the network device corresponds to an antenna with three polarization directions. In this case, the implementation of the antenna used for communication in the antenna channel can refer to the relevant description of (a) in Figure 5 and is not repeated here.

[0146] In one possible implementation, two antenna channels in the network device correspond to antennas with three polarization directions. In this case, the implementation of the antenna channels for communication between antennas can refer to the relevant description in FIG5 (b), which is not repeated here.

[0147] In one possible implementation, the antenna channel of a terminal or network device can select which polarization direction of the antenna to use for communication through a switching circuit. In other words, the polarization mapping module can be implemented by a switching circuit. The switching circuit includes multiple switching devices, and a switching device is connected between each antenna channel and each polarization direction. In this case, the state of the switching device in the switching circuit can be changed to change the antenna used by the antenna channel for communication. Taking the antenna channels and polarization directions in Figure 4 as an example, as shown in Figure 6, antenna channel 1 can be connected to antenna 1 through a switching device, antenna channel 1 can be connected to antenna 2 through a switching device, antenna channel 1 can be connected to antenna 3 through a switching device, antenna channel 2 can be connected to antenna 1 through a switching device, antenna channel 2 can be connected to antenna 2 through a switching device, and antenna channel 2 can be connected to antenna 3 through a switching device.

[0148] In one possible implementation, the antenna channel of a terminal or network device can select which polarization direction of the antenna to use for communication through a fully connected circuit. In other words, the polarization mapping module can be implemented by a fully connected circuit. Each antenna channel corresponds to a weight value. In this case, the weight value between the antenna channel and the antenna can be changed to change the antenna used by the antenna channel for communication. Taking the antenna channels and polarization directions in Figure 4 as an example, as shown in Figure 7, the weight value between antenna channel 1 and antenna 1 is w1, the weight value between antenna channel 1 and antenna 2 is w2, the weight value between antenna channel 1 and antenna 3 is w3, the weight value between antenna channel 2 and antenna 1 is w4, the weight value between antenna channel 2 and antenna 2 is w5, and the weight value between antenna channel 2 and antenna 3 is w6.

[0149] When the network device and the terminal device communicate in the communication system shown in FIG3 , the following three situations may occur.

[0150] In case 1, the terminal's polarization direction includes three polarization directions, and the network device's polarization direction includes two polarization directions. That is, the terminal considers three polarization directions. For example, as shown in Figure 8 (a), the terminal's polarization direction may include polarization direction x1, polarization direction y1, and polarization direction z1, and the network device's polarization direction may include polarization direction x1 and polarization direction y1.

[0151] In case 2, the terminal's polarization direction includes two polarization directions, and the network device's polarization direction includes three polarization directions. That is, the network device considers three polarization directions. For example, as shown in Figure 8(b), the terminal's polarization direction may include polarization direction x1 and polarization direction y1, while the network device's polarization direction may include polarization direction x1, polarization direction y1, and polarization direction z1. In this case, only the network device considers three polarization directions.

[0152] In case 3, the terminal's polarization direction includes three polarization directions, and the network device's polarization direction includes three polarization directions. That is, both the terminal and the network device consider three polarization directions. For example, as shown in Figure 8(c), the terminal's polarization direction may include polarization direction x1, polarization direction y1, and polarization direction z1, and the network device's polarization direction may include polarization direction x1, polarization direction y1, and polarization direction z1. It should be understood that the polarization directions shown in Figure 8 are for example only. In actual implementation, the polarization direction of the network device may differ from the polarization direction of the terminal device.

[0153] A terminal may be a terminal with transceiver functions, or may be a chip or chip system provided in the terminal. The terminal may also be referred to as user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station (MS), mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The terminal in the embodiments of the present application can be a mobile phone, a cellular phone, a smart phone, a tablet computer, a wireless data card, a personal digital assistant (PDA), a wireless modem, a handheld device (handset), a laptop computer, a machine type communication (MTC) terminal, a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a smart home device (for example, a refrigerator, a television, an air conditioner, an electric meter, etc.), an intelligent robot, a robotic arm, a workshop equipment, a wireless terminal in unmanned driving, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in telemedicine, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a vehicle-mounted terminal, a roadside unit with terminal function, a roadside control unit (ROU), ... unit, RSU), etc., flying equipment (for example, intelligent robots, hot air balloons, drones, airplanes), etc. The terminal of the present application may also be an on-board module, on-board module, on-board component, on-board chip or on-board unit that is built into the vehicle as one or more components or units. The terminal may also be other devices with terminal functions. For example, the terminal may also be a device that serves as a terminal function in D2D communication. The embodiments of the present application do not limit the device form of the terminal. The device for realizing the function of the terminal may be a terminal; it may also be a device that can support the terminal to realize the function, such as a chip system. The device can be installed in the terminal or used in combination with the terminal. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

[0154] The network device may be a device with wireless transceiver functions, or may be a chip or chip system provided in the device, located in the access network (AN) of the communication system, and used to provide access services to the terminal. For example, the network device may be referred to as a radio access network (RAN) device, and may specifically be an access network device of the next generation mobile communication system, such as 6G, such as a 6G base station. In the next generation mobile communication system, the network device may also have other naming methods, all of which are included in the scope of protection of the embodiments of this application, and this application does not impose any limitation on this. Alternatively, the network device may include 5G, such as a gNB in ​​a new radio (NR) system, or one or a group of antenna panels (including multiple antenna panels) of a base station in 5G, or a network node constituting a gNB, a transmission and reception point (TRP or TP), or a transmission measurement function (TMF), such as a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), a radio unit (RU), an RSU with base station functions, a wired access gateway, or a 5G core network element. Alternatively, the network device may include an access point (AP) in a wireless fidelity (WiFi) system, a wireless relay node, a wireless backhaul node, various types of macro base stations, micro base stations (also known as small cells), relay stations, access points, wearable devices, vehicle-mounted devices, and the like.

[0155] Among them, the CU and DU can be set separately, or can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU) or a remote radio head (RRH). It can be understood that the network device can be a CU node, a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into a network device in the access network RAN, or the CU can be divided into a network device in the core network CN, which is not limited here. In different systems, CU (or CU-CP and CU-UP), DU or RU can also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, the CU can also be called O-CU (Open CU), the DU can also be called O-DU, the CU-CP can also be called O-CU-CP, the CU-UP can also be called O-CU-UP, and the RU can also be called O-RU. For the convenience of description, this application uses CU, CU-CP, CU-UP, DU and RU as examples for description. Any of the CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module. In the embodiment of the present application, the form of the network device is not limited. The device for implementing the function of the network device can be a network device; it can also be a device that can support the network device to implement the function, such as a chip system. The device can be installed in the network device or used in combination with the network device.

[0156] As shown in Figure 9, the network device includes an RRC signaling interaction module (RRC in Figure 9), a MAC signaling interaction module (MAC in Figure 9), and a PHY signaling and data interaction module (PHY in Figure 9). The terminal includes an RRC signaling interaction module, a MAC signaling interaction module, and a PHY signaling and data interaction module.

[0157] The network device and the terminal can exchange RRC signaling through the RRC signaling interaction module. The network device and the terminal can exchange media access control element (MAC CE) signaling through the MAC signaling interaction module. The network device and the terminal can exchange one or more of the following through the PHY interaction module: uplink control signaling, downlink control signaling (such as DCI), uplink data, and downlink data.

[0158] It should be noted that the beam management method provided in the embodiment of the present application can be applied to the nodes shown in Figure 3, such as between the terminal and the network device. The specific implementation can refer to the following method embodiment, which will not be repeated here.

[0159] It should be noted that the solutions in the embodiments of the present application can also be applied to other communication systems, and the corresponding names can also be replaced by the names of corresponding functions in other communication systems.

[0160] It should be understood that Figure 3 is merely a simplified schematic diagram for ease of understanding, and the communication system may also include other network devices and / or other terminals, which are not shown in Figure 3. For ease of understanding, the following embodiments are described by exemplifying the end receiving data as the first communication device and the end sending data as the second communication device.

[0161] In order to improve the problem of polarization mismatch, an embodiment of the present application provides a beam management method. In the beam management method, the first communication device can determine a first receiving beam based on a polarization direction. The second communication device sends a reference signal on a transmitting beam, and the first communication device can receive the reference signal on the receiving beams corresponding to the three polarization directions based on the pointing angle of the first receiving beam, thereby determining the receiving beam for receiving data, wherein the second receiving beam is the receiving beam with the strongest signal strength of the reference signal received on the first communication device. In this way, a receiving beam for receiving data can be selected from the receiving beams corresponding to multiple polarization directions, and beam management can be performed when antennas with three polarization directions are provided in the terminal and / or network device.

[0162] An embodiment of the present application also provides a beam management method. In the beam management method, the second communication device can send a first reference signal on a first transmission beam, and the first communication device can receive the first reference signal on a receiving beam corresponding to each of the three polarization directions at the same pointing angle, and determine the first receiving beam. The second communication device sends a second reference signal on a second transmission beam. The first communication device receives a second reference signal on a receiving beam corresponding to multiple pointing angles in the polarization direction of the first receiving beam, thereby determining a receiving beam for receiving data, wherein the second receiving beam is the receiving beam with the strongest signal strength when receiving the second reference signal on the first communication device. In this way, a receiving beam for receiving data is selected from receiving beams in multiple polarization directions, and beam management can be performed when antennas in three polarization directions are provided in the terminal and / or network device.

[0163] An embodiment of the present application also provides a beam management method. In the beam management method, a first communication device can send a first reference signal on a transmission beam corresponding to multiple pointing angles in the same polarization direction. The second communication device can receive the first reference signal on a receiving beam, thereby determining the first transmission beam and feeding it back to the first communication device. The first communication device can send a second reference signal on a transmission beam corresponding to each of the three polarization directions of the first communication device, and the second communication device can receive the second reference signal on a receiving beam and determine a second transmission beam for sending data. The second transmission beam is the transmission beam when the signal strength of the second reference signal received by the first communication device is the largest. In this way, by selecting a transmission beam from transmission beams in multiple polarization directions, beam management can be performed when antennas in three polarization directions are provided in the terminal and / or network device.

[0164] An embodiment of the present application also provides a beam management method. In the beam management method, the first communication device can send a first reference signal on a transmission beam corresponding to each of the three polarization directions based on the same pointing angle. The second communication device can receive the first reference signal on a receiving beam, thereby determining the first transmission beam and feeding it back to the first communication device. The first communication device can send a second reference signal on a transmission beam corresponding to each of the multiple pointing angles based on the polarization direction of the first transmission beam, and the second communication device can receive the second reference signal on a receiving beam and determine the second transmission beam for sending data. The second transmission beam is the transmission beam when the signal strength of the second reference signal received by the first communication device is the largest. In this way, by selecting a transmission beam from transmission beams with multiple polarization directions, the polarization direction of the transmission beam can be matched with the polarization direction of the signal, thereby improving communication efficiency.

[0165] The beam management method provided in the embodiment of the present application will be described in detail below with reference to Figures 10-29.

[0166] In one possible embodiment, the polarization direction of one end receiving a signal, i.e., a first communication device, includes three polarization directions, and the polarization direction of a receive beam used by the first communication device to receive data is one of the three polarization directions of the first communication device. In this case, the beam management method may include a process for determining a receive beam used by the first communication device to receive data, wherein the beam management process is shown in Scenario 1 or Scenario 2 below.

[0167] Scenario 1: In the beam management process, a receiving beam is first determined from the receiving beams corresponding to multiple pointing angles in one polarization direction, and then a reference signal is received on the receiving beams corresponding to different polarization directions based on the pointing angle of the determined receiving beam, thereby obtaining a receiving beam for the first communication device to receive data.

[0168] The following is explained in conjunction with Figure 10. As shown in Figure 10, the beam management method includes:

[0169] S1001. A first communication device determines a first receiving beam based on a first polarization direction.

[0170] The first communication device may be a terminal or a network device as shown in Figure 3. For example, in a scenario where the data to be received is sent from the network device to the terminal, the first communication device is the terminal. In another example, in a scenario where the data to be received is sent from the terminal to the network device, the first communication device is the network device. The polarization direction of the first communication device includes three polarization directions. For example, the polarization direction of the first communication device may include the polarization directions shown in Figures 5 to 7.

[0171] The first polarization direction is any one of the three polarization directions of the first communication device.

[0172] The first receive beam is one of the receive beams configured on the first communication device and polarized in the first polarization direction. For example, the first receive beam may be the receive beam configured on the first communication device and polarized in the first polarization direction that receives the reference signal, such as the second reference signal described below, with the highest signal strength. This improves the signal-to-noise ratio, thereby enhancing communication efficiency.

[0173] It should be understood that for the receive beam configured on the first communication device, the combination of a polarization direction and a pointing angle corresponds to a receive beam. The first receive beam corresponds to the first polarization direction and the first pointing angle. Alternatively, the polarization direction of the first receive beam is the first polarization direction, and the pointing angle of the first receive beam is the first pointing angle. In other words, the combination of the first polarization direction and the first pointing angle corresponds to the first receive beam.

[0174] In one possible implementation, S1001 may include: the second communication device transmitting a second reference signal on a second transmit beam. Accordingly, the first communication device receives the second reference signal on each receive beam in the second receive beam set and determines the first receive beam.

[0175] The second communication device may be a terminal or a network device as shown in Figure 3. For example, in a scenario where the data to be received is sent from a network device to a terminal, the second communication device is a network device. For another example, in a scenario where the data to be received is sent from a terminal to a network device, the second communication device is a terminal. The polarization directions of the second communication device may include two polarization directions or three polarization directions. For example, the polarization directions of the second communication device may include two polarization directions or three polarization directions as shown in any of Figures 5 to 7.

[0176] The second transmit beam is any one transmit beam in the transmit beam set of the second communication device. The transmit beam set of the second communication device includes transmit beams configured on the second communication device. The second transmit beam can be agreed upon by a protocol or determined by the second communication device from the transmit beam set of the second communication device.

[0177] In one possible implementation, the transmit beam configured on the second communication device may not distinguish between polarization directions. In this case, one transmit beam in the transmit beam set corresponds to one pointing angle of the second communication device. In other words, a transmit beam at one pointing angle constitutes one transmit beam.

[0178] In one possible implementation, the transmit beams configured on the second communication device can distinguish polarization directions. In this case, the transmit beam set includes a beam corresponding to each polarization direction and each pointing angle of the second communication device. A transmit beam in the transmit beam set corresponds to a polarization direction and a pointing angle of the second communication device. That is, a transmit beam corresponding to a combination of a polarization direction and a pointing angle of the second communication device constitutes a transmit beam.

[0179] The second reference signal may be a downlink reference signal, such as a channel state information reference signal (CSI-RS) or other possible reference signals. For the first communication device, the second reference signal is sent by the second communication device on a second transmit beam.

[0180] The second receive beam set includes: receive beams corresponding to multiple pointing angles in the first polarization direction. The second receive beam set corresponds to the first polarization direction. When the second receive beam set is determined, the first polarization direction is also determined. When the first polarization direction is determined, the second receive beam is also determined. The second receive beam set can be determined by the first communication device, or it can be understood that the first polarization direction can be determined by the first communication device; or the second receive beam set can be determined by other devices, such as the second communication device, or it can be understood that the first polarization direction can be determined by other devices, such as the second communication device; or the second receive beam set can be agreed upon by a protocol, or it can be understood that the first polarization direction can be agreed upon by a protocol.

[0181] The first receive beam is a receive beam in the second receive beam set. For example, the first receive beam may be a receive beam in the second receive beam set that receives the second reference signal with a signal strength greater than the first signal strength threshold, or the first receive beam may be a receive beam in the second receive beam set that receives the second reference signal with the highest signal strength.

[0182] In the embodiment of the present application, the signal strength refers to the signal received on the receiving beam, such as the signal strength of the reference signal.

[0183] In this way, the first receiving beam can be selected from multiple receiving beams with different directional angles. Since the directional angle of the second receiving beam is the directional angle of the first receiving beam, the directional angle of the second receiving beam can be matched with the direction of the signal, thereby further improving communication efficiency.

[0184] For the implementation principle of S1001, please refer to the relevant introduction of S1104, S1204, S1304, or S1404, which will not be repeated here.

[0185] S1002: The second communication device transmits a first reference signal on a first transmit beam. Correspondingly, the first communication device receives the first reference signal on each receive beam in a first receive beam set and determines a second receive beam.

[0186] The first transmission beam is any one of the transmission beams of the second communication device. The first transmission beam and the second transmission beam may be the same or different.

[0187] The first reference signal can be an uplink reference signal or a downlink reference signal. For example, if the first communication device is a terminal, the first reference signal is a downlink reference signal, such as a CSI-RS. For another example, if the first communication device is a network device, the first reference signal is an uplink reference signal. Alternatively, the first reference signal can be other possible reference signals, which are not described here. For the first communication device, the first reference signal is sent by the second communication device on the first transmit beam.

[0188] The first receiving beam set includes: receiving beams corresponding to the three polarization directions of the first communication device at the first pointing angle.

[0189] The second receive beam is used for receiving data by the first communication device. The second receive beam is the receive beam in the first receive beam set that receives the first reference signal with the highest signal strength. The second receive beam has a pointing angle equal to the first pointing angle, and a polarization direction equal to a second polarization direction, which is one of the three polarization directions of the first communication device. It should be understood that the second polarization direction can be the same as the first polarization direction, or can be two different polarization directions.

[0190] For the implementation principle of S1002, please refer to the relevant introduction of S1105, S1205, S1305, or S1405 below, which will not be repeated here.

[0191] Based on the beam management method provided in Figure 10, the first communication device can determine a first receiving beam with a pointing angle of a first angle in a polarization direction, such as the first polarization direction mentioned above, and receive a reference signal on the receiving beams corresponding to the three polarization directions of the first communication device at the first pointing angle to determine a second receiving beam. The second receiving beam is a beam with the first pointing angle and the polarization direction of the receiving beam with the largest signal strength of the first reference signal received among the receiving beams in the three polarization directions, that is, a receiving beam for receiving data is selected from the receiving beams in multiple polarization directions. Beam management can be performed when antennas with three polarization directions are provided in the terminal and / or network device.

[0192] In addition, the beam management method provided in Figure 10 can determine a first receiving beam on a receiving beam corresponding to each of a plurality of pointing angles in a polarization direction, and determine a second receiving beam based on receiving a reference signal on a receiving beam corresponding to different polarization directions at the first pointing angle. In this way, the polarization direction of the receiving beam can be matched with the direction of the signal, thereby improving communication efficiency, and avoiding the first communication device from receiving reference signals on all receiving beams, reducing the complexity of the beam management process, and thus reducing resource overhead.

[0193] The following further illustrates the beam management method provided in Figure 10 using detailed scenarios. For ease of understanding, the following embodiments utilize an example in which S1001 includes: a second communication device transmitting a second reference signal on a second transmit beam. Correspondingly, a first communication device receives the second reference signal on each receive beam in a second receive beam set and determines the first receive beam.

[0194] In scenario 1.1, the first communication device is a terminal, and the polarization direction of the first communication device includes three polarization directions. The second communication device is a network device. For example, the first communication device and the second communication device are shown in (a) of Figure 8. In this case, the process of the beam management method is shown in Figure 11. The beam management method provided in Figure 11 includes:

[0195] S1101: The first communication device sends information #1, ie, ninth information. Correspondingly, the second communication device receives information #1.

[0196] The information #1 is used to indicate the number of receiving antennas on the first communication device and the number of polarization directions of the receiving antennas on the first communication device.

[0197] In a possible implementation, information #1 may include the number of receiving antennas on the first communication device.

[0198] In one possible implementation, information #1 may include the number of polarization directions of the receiving antenna on the first communication device, or information #1 may include the index of each polarization direction of the receiving antenna on the first communication device. The index of each polarization direction of the receiving antenna on the first communication device is the index of the polarization direction of the receiving antenna on the first communication device.

[0199] In a possible implementation, information #1 may also be used to indicate beam configuration.

[0200] It can be understood that S1101 is an optional step.

[0201] S1102: The second communication device sends information #2, i.e., the tenth information. Correspondingly, the first communication device receives information #2.

[0202] Information #2 is determined by the second communication device based on information #1. Information #2 indicates the direction angle and number of polarization directions of the receive beam for beam management by the first communication device. The number of polarization directions of the receive beam for beam management by the first communication device is less than or equal to the number of polarization directions of the receive antenna on the first communication device. If the number of polarization directions of the receive beam for beam management by the first communication device is equal to the number of polarization directions of the receive antenna on the first communication device, the following steps of S1103 may be executed to perform beam management.

[0203] Alternatively, information #2 is used to indicate the polarization direction of the receive beam for beam management by the first communication device. The polarization directions for beam management by the first communication device are at least some of the polarization directions on the first communication device. If the polarization directions for beam management by the first communication device are the three polarization directions on the first communication device, the following steps of S1103 may be performed to perform beam management.

[0204] Information #2 can also be called beam configuration information.

[0205] It should be understood that without executing S1101, the number of receiving antennas on the first communication device and the number of polarization directions of the receiving antennas on the first communication device can be agreed upon by the protocol, and information #2 is determined by the second communication device based on the number of receiving antennas on the first communication device and the number of polarization directions of the receiving antennas on the first communication device.

[0206] S1103: The second communication device sends information #3, namely, the first information. Correspondingly, the first communication device receives information #3.

[0207] Among them, information #3 is used to indicate that the second reference signal is received on the receiving beams corresponding to multiple pointing angles in the same polarization direction, that is, to indicate that beam scanning is performed on the receiving beams corresponding to multiple pointing angles in the same polarization direction.

[0208] It should be understood that the "Xth reference signal" in the embodiments of the present application refers to a reference signal within a time period. For example, the second reference signal may be a reference signal within the first time period. It should be understood that in the embodiments of the present application, different reference signals in the same scenario refer to reference signals within different time periods. For example, the first reference signal may be a reference signal within the second time period, and the first time period and the second time period are different. In subsequent scenarios, the "Xth reference signal" refers to a reference signal within a time period, and will not be further described.

[0209] In this way, the process of receiving the second reference signal and determining the first receive beam can be triggered by the second communication device, which can improve the flexibility of the beam management process.

[0210] It can be understood that in the embodiment of the present application, S1103 is an optional step.

[0211] S1104: The second communication device transmits a second reference signal on the second transmit beam. Correspondingly, the first communication device receives the second reference signal on each receive beam in the second receive beam set and determines the first receive beam.

[0212] Regarding the implementation of the second transmit beam, the second reference signal, the second receive beam set, and the first receive beam, reference may be made to the relevant description in S1001, wherein the polarization direction of the second communication device may include two polarization directions. Regarding the implementation of S1104, reference may be made to the relevant description in S1001. The difference is that, when S1103 is executed, S1104 may be executed after S1103, wherein the first communication device receives the second reference signal on each receive beam in the second receive beam set and determines the first receive beam, which may include: the first communication device receives the second reference signal on each receive beam in the second receive beam set according to information #3 and determines the first receive beam. In other words, the execution process of the first communication device receiving the second reference signal on each receive beam in the second receive beam set and determining the first receive beam can be triggered by information #3. In this way, the beam management process can be executed according to the actual scenario, thereby improving flexibility.

[0213] In the case that S1103 is not executed, the execution timing of S1104 may be agreed upon in the protocol, for example, S1104 may be executed at the first time interval from the completion of S1102.

[0214] S1105: The second communication device transmits a first reference signal on the first transmit beam. Correspondingly, the first communication device receives the first reference signal on each receive beam in the first receive beam set and determines a second receive beam.

[0215] For the implementation of the first transmit beam, the first reference signal, the first receive beam set, and the second receive beam, please refer to the relevant description in S1002. The first reference signal is a downlink reference signal. For the implementation of S1105, please refer to the relevant description in S1002 and will not be repeated here.

[0216] In some possible implementations, before S1105, the second communication device may further transmit information indicating reception of the first reference signal on receive beams corresponding to the three polarization directions at the same orientation angle. Accordingly, the first communication device may receive information indicating reception of the first reference signal on receive beams corresponding to the three polarization directions of the first communication device at the same orientation angle. In this case, the implementation of S1105 may refer to the relevant description of S1104 and will not be repeated here.

[0217] In addition, the method provided in FIG. 11 may further include S1106 .

[0218] S1106: The second communication device sends information #4, ie, third information. Correspondingly, the first communication device receives information #4.

[0219] Information #4 is used to indicate that the third reference signal is received on one receive beam.

[0220] In this way, the process of receiving the third reference signal can be triggered by the second communication device, which can improve the flexibility of beam management.

[0221] It should be understood that S1106 is an optional step.

[0222] S1107: The second communication device transmits a third reference signal in each transmit beam in the first transmit beam set. Correspondingly, the first communication device receives the third reference signal on the third receive beam and determines the third transmit beam.

[0223] The first transmission beam set is a set of transmission beams configured on the second communication device. For implementation of the first transmission beam set, reference may be made to the relevant introduction to the transmission beam set in S1001 and will not be elaborated herein.

[0224] The third reference signal may be a downlink reference signal, such as a CSI-RS or other possible downlink reference signals. For the first communication device, the third reference signal is sent by the second communication device in each transmit beam in the first transmit beam set.

[0225] The third receive beam is one of the receive beams configured on the first communication device. It is understood that the third receive beam and the first receive beam can be the same receive beam or two different receive beams. Similarly, the third receive beam and the second receive beam can be the same receive beam or two different receive beams.

[0226] The second transmission beam is a transmission beam in the first transmission beam set. For example, the second transmission beam may be a transmission beam in the first transmission beam set for which the signal strength of the third reference signal received by the first communication device is greater than the second signal strength threshold.

[0227] For example, the first communication device can measure the signal strength of the third reference signal sent on each transmit beam in the first transmit beam set on the third receive beam based on the received third reference signal, thereby determining the third transmit beam based on the strength of the third reference signal received on each transmit beam in the first transmit beam set. For example, the third transmit beam can be the transmit beam in the first transmit beam set that has the greatest receive signal strength of the third reference signal sent, that is, the transmit beam with the greatest signal strength of the third reference signal received by the first communication device. The received signal strength refers to the strength of the reference signal received by the beam that receives the reference signal. The definition of the received signal strength in subsequent scenarios can be referred to here and will not be repeated here.

[0228] It should be understood that in an embodiment of the present application, when S1106 is executed, S1107 can be executed after S1106, and the first communication device receives the third reference signal on the third receiving beam and determines the third transmitting beam, including: the first communication device receives the third reference signal on the third receiving beam according to information #4, and determines the third transmitting beam.

[0229] If S1106 is not executed, the execution timing of S1107 may be predetermined by the second communication device. The second communication device may configure the execution timing of the first communication device receiving the third reference signal on the third receive beam and determining the execution timing of the third transmit beam. For example, information #2 may carry information indicating the execution timing of S1107. In other words, information #2 may configure the first communication device to receive the third reference signal on the third receive beam and determine the execution timing of the third transmit beam.

[0230] That is to say, the first communication device can receive the reference signal sent on different transmitting beams of the second communication device on one receiving beam, such as the third reference signal mentioned above. In this way, the first communication device can obtain the signal quality strength on different transmitting beams of the second communication device, and thus determine the transmitting beam used by the second communication device to send data.

[0231] It can be understood that the first communication device can indicate the third transmission beam to the second communication device.

[0232] In a possible implementation, the beam management method provided in FIG11 may further include S1108.

[0233] S1108: The first communication device sends information #5. Correspondingly, the second communication device receives information #5.

[0234] Among them, information #5 is used to indicate the third transmitting beam.

[0235] Information #5 may be indicated explicitly, such as by carrying an identifier of the third transmission beam, or may be indicated implicitly, such as by carrying a pointing angle corresponding to the third beam to indicate the second transmission beam.

[0236] In a possible implementation, the beam management method provided in FIG11 may further include S1109.

[0237] S1109: The second communication device transmits data on the third transmit beam. Correspondingly, the first communication device receives data on the second receive beam.

[0238] Regarding the beneficial effects of the beam management method provided in FIG11 , reference may be made to the beneficial effects of the beam management method provided in FIG10 , and no further details will be given.

[0239] In scenario 1.2, the first communication device is a network device, and the polarization direction of the first communication device includes three polarization directions. The second communication device is a terminal. For example, the first communication device and the second communication device are shown in (b) of Figure 8. In this case, the process of the beam management method is shown in Figure 12. The beam management method provided in Figure 12 includes:

[0240] S1201: The second communication device sends information #1, ie, the eleventh information. The first communication device receives information #1.

[0241] The information #1 is used to indicate the number of transmitting antennas on the second communication device and the number of polarization directions of the transmitting antennas on the second communication device.

[0242] In a possible implementation, the information #1 may include the number of transmitting antennas on the second communication device to indicate the number of transmitting antennas on the second communication device.

[0243] In one possible implementation, information #1 may include the number of polarization directions of the transmit antenna on the second communication device, or information #1 may include the index of each polarization direction of the transmit antenna on the second communication device. The index of each polarization direction of the transmit antenna on the first communication device is the index of the polarization direction of the transmit antenna on the second communication device.

[0244] In a possible implementation, information #1 is also used to indicate beam configuration.

[0245] It should be understood that S1201 is an optional step.

[0246] S1202: The first communication device sends information #2, i.e., the twelfth information. Correspondingly, the second communication device receives information #2.

[0247] Information #2 is determined based on information #1 and is used to indicate the number of pointing angles and polarization directions of the transmit beams for beam management by the second communication device. The number of pointing angles and polarization directions of the transmit beams for beam management by the second communication device is less than or equal to the number of polarization directions of the transmit antenna on the second communication device. If the number of polarization directions of the transmit beams for beam management by the second communication device is equal to the number of polarization directions of the transmit antenna on the second communication device, the following steps in S1203 may be performed to perform beam management.

[0248] Alternatively, information #2 is used to indicate the pointing angle and polarization direction of the transmit beam for beam management by the second communication device. The polarization direction of the transmit beam for beam management by the second communication device is at least some of the polarization directions of the second communication device. If the polarization direction of the transmit beam for beam management by the second communication device is one of the three polarization directions of the second communication device, the following steps of S1203 may be performed to perform beam management.

[0249] Information #2 can also be called beam configuration information.

[0250] It should be understood that without executing S1201, the number of transmitting antennas on the second communication device and the number of polarization directions of the transmitting antennas on the second communication device can be agreed upon by the protocol, and information #2 is determined by the first communication device based on the number of transmitting antennas on the second communication device and the number of polarization directions of the transmitting antennas on the second communication device.

[0251] S1203: The first communication device sends information #3, ie, second information. Correspondingly, the second communication device receives information #3.

[0252] Information #3 is used to indicate that a second reference signal is sent on a transmit beam.

[0253] In this way, the process of receiving the second reference signal and determining the first receive beam can be triggered by the first communication device, which can improve the flexibility of the beam management process.

[0254] It should be understood that in the embodiment of the present application, S1203 is an optional step.

[0255] S1204: The second communication device transmits a second reference signal on the second transmit beam. Correspondingly, the first communication device receives the second reference signal on each receive beam in the second receive beam set and determines the first receive beam.

[0256] Regarding the implementation of the second transmit beam, the second reference signal, the second receive beam set, and the first receive beam, reference can be made to the relevant introduction in S1104, which will not be repeated here.

[0257] For the implementation of S1204, reference may be made to the relevant introduction of S1104. The difference is that S1204 may be executed after S1204.

[0258] S1205: The second communication device transmits a first reference signal on the first transmit beam. Correspondingly, the first communication device receives the first reference signal on each receive beam in the first receive beam set and determines a second receive beam.

[0259] For the implementation of the first transmit beam, the first reference signal, the first receive beam set, and the second receive beam, please refer to the relevant introduction in S1002. For the implementation of S1205, please refer to the relevant introduction in S1002, which will not be repeated here.

[0260] In some possible implementation schemes, before S1205, the first communication device may further send information for indicating that the first reference signal is received on the receiving beams corresponding to each of the multiple pointing angles. Accordingly, the first communication device may receive information for indicating that the first reference signal is received on the receiving beams corresponding to each of the multiple pointing angles. In this case, the implementation of S1205 may refer to the relevant introduction of S1104, the difference being that the execution timing of S1205 may be after the first communication device may further send information for indicating that the first reference signal is received on the receiving beams corresponding to each of the multiple pointing angles. Accordingly, the first communication device may receive information for indicating that the first reference signal is received on the receiving beams corresponding to each of the multiple pointing angles.

[0261] S1206: The first communication device sends information #4, ie, fourth information. Correspondingly, the second communication device receives information #4.

[0262] Information #4 is used to indicate that a third reference signal is sent on a transmission beam corresponding to each of multiple pointing angles.

[0263] In this way, the process of receiving the third reference signal can be triggered by the first communication device, which can improve the flexibility of beam management.

[0264] It should be understood that S1206 may or may not be executed.

[0265] S1207: The second communication device transmits a third reference signal on each transmit beam in the first transmit beam set. Correspondingly, the first communication device receives the third reference signal on the third receive beam and determines the third transmit beam.

[0266] For details on the first transmit beam set, the third reference signal, the third receive beam, and the implementation of the third transmit beam, refer to the relevant description in S1107. The third reference signal may be an uplink reference signal. For details on the implementation of S1207, refer to the relevant description in S1107, except that S1207 may be executed after S1206.

[0267] In a possible implementation, the beam management method provided in FIG12 may further include S1208.

[0268] S1208: The first communication device sends information #5. Correspondingly, the second communication device receives information #5.

[0269] Among them, information #5 is used to indicate the third transmitting beam.

[0270] Regarding the implementation of information #5 and the implementation principle of S1208, please refer to the relevant introduction of S1108 and will not be repeated here.

[0271] In a possible implementation, the beam management method provided in FIG12 may further include S1209.

[0272] S1209: The second communication device transmits data on the third transmit beam. Correspondingly, the first communication device receives data on the second receive beam.

[0273] For the implementation principle of S1209, please refer to the above introduction of S1109, which will not be repeated here.

[0274] Regarding the beneficial effects of the beam management method provided in FIG12 , reference may be made to the beneficial effects of the beam management method provided in FIG10 , and no further details will be given.

[0275] In scenario 1.3, the first communication device is a terminal, and the polarization direction of the first communication device includes three polarization directions. The second communication device is a network device, and the polarization direction of the second communication device includes three polarization directions. For example, the first communication device and the second communication device are shown in (c) of Figure 8. In this case, the process of the beam management method is shown in Figure 13. The beam management method provided in Figure 13 includes:

[0276] S1301: The first communication device sends information #1, ie, ninth information. Correspondingly, the second communication device receives information #1.

[0277] S1302: The second communication device sends information #2, i.e., the tenth information. Correspondingly, the first communication device receives information #2.

[0278] S1303: The second communication device sends information #3, namely, the first information. Correspondingly, the first communication device receives information #3.

[0279] S1304: The second communication device transmits a second reference signal on the second transmit beam. Correspondingly, the first communication device receives the second reference signal on each receive beam in the second receive beam set and determines the first receive beam.

[0280] S1305: The second communication device transmits a first reference signal on the first transmit beam. Correspondingly, the first communication device receives the first reference signal on each receive beam in the first receive beam set and determines a second receive beam.

[0281] For the names in S1301 to S1305, please refer to the relevant introduction in S1101 to S1105. For the implementation of S1301 to S1305, please refer to the relevant introduction in S1101 to S1105 respectively, and no further details will be given.

[0282] S1306: The second communication device sends information #4, ie, the fifth information. Correspondingly, the first communication device receives information #4.

[0283] Information #4 is used to indicate that a fourth reference signal is received on one receive beam.

[0284] In this way, the process of receiving the fourth reference signal and determining the process of the fourth transmit beam can be triggered by the second communication device, which can improve the flexibility of beam management.

[0285] It should be understood that S1306 is an optional step.

[0286] S1307: The second communication device transmits a fourth reference signal on each transmit beam in the second transmit beam set. Correspondingly, the first communication device receives the fourth reference signal on the fourth receive beam and determines the fourth transmit beam.

[0287] The second transmission beam set includes: transmission beams corresponding to multiple pointing angles in the same polarization direction of the second communication device.

[0288] The fourth reference signal may refer to the related introduction of the first reference signal or the second reference signal in Figure 11. For the first communication device, the fourth reference signal is transmitted by the second communication device on each transmission beam in the second transmission beam set.

[0289] The fourth receive beam is one of the receive beams configured on the first communication device. It is understood that the fourth receive beam and the first receive beam can be the same receive beam or two different receive beams. Similarly, the fourth receive beam and the second receive beam can be the same receive beam or two different receive beams.

[0290] The fourth transmit beam is a transmit beam in the second transmit beam set, and the fourth transmit beam corresponds to the second pointing angle. For example, the fourth transmit beam may be a transmit beam in the second transmit beam set whose received signal strength of the fourth reference signal transmitted is greater than the third signal strength threshold. Alternatively, the fourth transmit beam may be a transmit beam in the second transmit beam set whose received signal strength of the fourth reference signal transmitted is the highest.

[0291] In this embodiment of the present application, the first communications device may measure, based on the received fourth reference signal, the received signal strength of the fourth reference signal transmitted on each transmit beam in the second transmit beam set, thereby determining the fourth transmit beam based on the received signal strength of the fourth reference signal received on each transmit beam in the second transmit beam set. For example, the fourth transmit beam may be the transmit beam in the second transmit beam set that transmits the fourth reference signal with the highest received signal strength, i.e., the transmit beam corresponding to the maximum signal strength of the fourth reference signal received by the first communications device.

[0292] For the implementation of S1307, reference may be made to the relevant introduction of S1107. The difference is that S1307 may be executed after S1306.

[0293] S1308: The second communication device sends information #5, ie, the seventh information. Correspondingly, the first communication device receives #5.

[0294] Information #5 is used to indicate that the fifth reference signal is received on one receive beam.

[0295] In this way, the process of receiving the fifth reference signal and determining the fifth reference signal can be triggered by the second communication device, which can improve the flexibility of beam management.

[0296] It should be understood that S1308 may or may not be executed.

[0297] S1309: The second communication device transmits a fifth reference signal on each transmit beam in the third transmit beam set. Correspondingly, the first communication device receives the fifth reference signal on the fifth receive beam and determines the fifth transmit beam.

[0298] The third transmit beam set includes transmit beams corresponding to the three polarization directions of the second communication device at the second pointing angle. For the first communication device, the fifth reference signal is transmitted by the second communication device on each transmit beam in the third transmit beam set.

[0299] The implementation of the fifth reference signal may refer to the relevant introduction of the fourth reference signal, wherein, for the first communication device, the fifth reference signal is sent by the second communication device on each transmission beam in the third transmission beam set.

[0300] The fifth transmit beam is a transmit beam in the third transmit beam set.

[0301] The pointing angle corresponding to the fifth transmitting beam is the third pointing angle, and the polarization direction corresponding to the fifth transmitting beam is one of the three polarization directions of the second communication device.

[0302] In this embodiment of the present application, the first communications device may measure, based on the received fifth reference signal, the received signal strength of the fifth reference signal transmitted on each transmit beam in the third transmit beam set, thereby determining the fifth transmit beam based on the received signal strength of the fifth reference signal transmitted on each transmit beam in the third transmit beam set. For example, the fifth transmit beam may be the transmit beam in the third transmit beam set that transmits the fifth reference signal with the highest received signal strength, i.e., the transmit beam corresponding to the maximum signal strength of the fifth reference signal received by the first communications device.

[0303] For the implementation of S1309, reference may be made to the relevant introduction of S1107. The difference is that S1309 may be executed after S1308.

[0304] In this way, the first communication device can receive on a receiving beam the reference signal sent by the second communication device on the transmitting beam corresponding to each of the three polarization directions of the second communication device at the second pointing angle, such as the fifth reference signal mentioned above. In this way, the first communication device can obtain the signal quality of each transmitting beam corresponding to different polarization directions at the first pointing angle, and thus can determine the fifth transmitting beam whose polarization direction and pointing angle both match the direction of the signal, thereby further improving the communication quality.

[0305] In a possible implementation, the beam management method provided in FIG13 may further include S1310.

[0306] S1310: The first communication device sends information #6. Correspondingly, the second communication device receives information #6.

[0307] Among them, information #6 is used to indicate the fifth transmitting beam.

[0308] Information #5 may be indicated explicitly, such as by carrying the identifier of the second transmission beam, or may be indicated implicitly, such as by carrying the pointing angle corresponding to the fifth beam to indicate the fifth transmission beam.

[0309] For the implementation of S1310, please refer to the above-mentioned introduction of S1108 and will not be described in detail here.

[0310] In a possible implementation, the beam management method provided in FIG13 may further include S1311.

[0311] S1311: The second communication device transmits data on the fifth transmit beam. Correspondingly, the first communication device receives data on the second receive beam.

[0312] For the implementation of S1311, please refer to the above introduction of S1109 and will not be described in detail here.

[0313] For the beneficial effects of the beam management method provided in FIG. 13 , reference may be made to the beneficial effects of the beam management method provided in FIG. 10 .

[0314] In scenario 1.4, the first communication device is a network device, and the polarization direction of the first communication device includes three polarization directions. The second communication device is a terminal, and the polarization direction of the second communication device includes three polarization directions. For example, the first communication device and the second communication device are shown in (c) of Figure 8. In this case, the process of the beam management method is shown in Figure 14. The beam management method provided in Figure 14 includes:

[0315] S1401: The second communication device sends information #1, ie, the eleventh information. The first communication device receives information #1.

[0316] S1402: The first communication device sends information #2, i.e., the twelfth information. Correspondingly, the second communication device receives information #2.

[0317] S1403: The first communication device sends information #3, ie, the second information. Correspondingly, the second communication device receives information #3.

[0318] S1404: The second communication device transmits a second reference signal on the second transmit beam. Correspondingly, the first communication device receives the second reference signal on each receive beam in the second receive beam set and determines the first receive beam.

[0319] S1405: The second communication device transmits a first reference signal on the first transmit beam. Correspondingly, the first communication device receives the first reference signal on each receive beam in the first receive beam set and determines a second receive beam.

[0320] For the names in S1401 to S1405, please refer to the relevant introduction of S1201 to S1205. For the implementation of S1401 to S1405, please refer to the relevant introduction of S1201 to S1205 in sequence, and no further details will be given.

[0321] S1406: The first communication device sends information #4, ie, sixth information. The second communication device receives information #4. Information #4 is used to instruct to send a fourth reference signal on the same polarization direction and on transmit beams corresponding to multiple pointing angles.

[0322] In this way, the first communication device can trigger the reception of the fourth reference signal and determine the process of the fourth transmit beam, which can improve the flexibility of beam management.

[0323] It should be understood that S1207 may or may not be executed.

[0324] S1407: The second communication device transmits a fourth reference signal on each transmit beam in the second transmit beam set. Correspondingly, the first communication device receives the fourth reference signal on the fourth receive beam and determines the fourth transmit beam.

[0325] The second transmission beam set includes: transmission beams corresponding to multiple pointing angles in the same polarization direction of the second communication device.

[0326] The fourth reference signal may be an uplink reference signal. For the first communication device, the fourth reference signal is transmitted by the second communication device on each transmission beam in the second transmission beam set.

[0327] The fourth transmission beam is a transmission beam in the second transmission beam set and corresponds to the second pointing angle.

[0328] For the implementation principle of S1407, reference may be made to the relevant introduction of S1107. The difference is that S1407 may be executed after S1406.

[0329] S1408: The first communication device sends information #5, ie, the eighth information. Correspondingly, the second communication device receives information #5.

[0330] The information #5 is used to indicate that the fifth reference signal is sent on the transmission beams corresponding to the three polarization directions at the same pointing angle.

[0331] In this way, the process of receiving the fifth reference signal and determining the fifth reference signal can be triggered by the first communication device, which can improve the flexibility of beam management.

[0332] S1409: The second communication device transmits a fifth reference signal on each transmit beam in the third transmit beam set. Correspondingly, the first communication device receives the fifth reference signal on the fifth receive beam and determines the fifth transmit beam.

[0333] For the implementation of the third transmit beam, the fifth reference signal, the fifth receive beam and the fifth transmit beam, reference may be made to the relevant introduction in S1309.

[0334] The fifth reference signal may be an uplink reference signal. For the first communication device, the fifth reference signal is sent by the second communication device on each transmit beam in the third transmit beam set.

[0335] For the implementation of S1409, reference may be made to the relevant introduction of S1309. The difference is that S1409 may be executed after S1308.

[0336] In a possible implementation, the beam management method provided in FIG14 may further include S1410.

[0337] S1410: The first communication device sends information #6. Correspondingly, the second communication device receives information #6.

[0338] Among them, information #6 is used to indicate the fifth transmitting beam.

[0339] For the implementation of S1410, please refer to the above-mentioned introduction of S1108 and will not be elaborated here.

[0340] In a possible implementation, the beam management method provided in FIG14 may further include S1411.

[0341] S1411: The second communication device transmits data on the fifth transmit beam. Correspondingly, the first communication device receives data on the second receive beam.

[0342] Regarding the beneficial effects of the beam management method provided in FIG14 , reference may be made to the beneficial effects of the beam management method provided in FIG10 , and no further details will be given.

[0343] In scenario 2, in the beam management process, a receiving beam is first determined in the receiving beams corresponding to different polarization directions and different pointing angles. Then, based on the determined pointing angle of the receiving beam, a reference signal is received on the receiving beams of different polarization directions of the first communication device, thereby obtaining a receiving beam used for the first communication device to receive data.

[0344] The following is explained in conjunction with Figure 15. As shown in Figure 15, the beam management method includes:

[0345] S1501: A second communication device transmits a first reference signal on a first transmit beam. Correspondingly, a first communication device receives the first reference signal on each receive beam in a first receive beam set and determines a first receive beam.

[0346] Regarding the implementation of the first communication device and the second communication device, reference may be made to the relevant introduction in S1001 and details will not be given here.

[0347] The first transmit beam is any one transmit beam in a set of transmit beams of the second communication device. The set of transmit beams includes transmit beams configured on the second communication device. The second transmit beam may be agreed upon by a protocol or determined by the second communication device from the set of transmit beams of the second communication device.

[0348] In one possible implementation, the transmission beam of the second communication device may not distinguish polarization directions. In this case, one transmission beam in the transmission beam set corresponds to one directional angle of the second communication device. In other words, a transmission beam at one directional angle is one transmission beam.

[0349] In one possible implementation, the transmit beam of the second communication device can distinguish polarization directions. In this case, the transmit beam set includes a beam corresponding to each polarization direction and each pointing angle of the second communication device. One beam in the transmit beam set corresponds to one polarization direction and one pointing angle of the second communication device. That is, the transmit beam corresponding to the combination of one polarization direction and one pointing angle of the second communication device constitutes one transmit beam.

[0350] The first reference signal can be an uplink reference signal or a downlink reference signal. For example, if the first communication device is a terminal, the first reference signal is a downlink reference signal, such as a CSI-RS. For another example, if the first communication device is a network device, the first reference signal is an uplink reference signal. Or other possible reference signals, which are not described here. For the first communication device, the first reference signal is sent by the second communication device on the first transmit beam. For the first communication device, the first reference signal is sent by the second communication device on the first transmit beam.

[0351] The first receiving beam set includes: receiving beams corresponding to the three polarization directions of the first communication device in the same pointing direction. The first receiving beam set corresponds to the first pointing angle. When the first receiving beam set is determined, the first pointing angle is also determined. When the first pointing angle is determined, the first receiving beam is also determined. The first receiving beam set can be determined by the first communication device, or it can be understood that the first pointing angle can be determined by the first communication device; or the first receiving beam set can be determined by other devices, such as the second communication device, or it can be understood that the first pointing angle can be determined by other devices, such as the second communication device; or the first receiving beam set can be agreed upon by protocol, or it can be understood that the first pointing angle can be agreed upon by protocol.

[0352] The first receive beam is a receive beam in the first receive beam set. For example, the first receive beam is a receive beam in the first receive beam set whose received first reference signal has a signal strength greater than a first signal strength threshold. In another example, the first receive beam is a receive beam in the first receive beam set whose received first reference signal has the highest signal strength. The polarization direction corresponding to the first receive beam is the first polarization direction, which is one of the three polarization directions of the first communication device. The pointing angle corresponding to the first receive beam is the first pointing angle.

[0353] S1502: The second communication device transmits a second reference signal on a second transmit beam. Correspondingly, the first communication device receives the second reference signal on each receive beam in the second receive beam set and determines a second receive beam.

[0354] The second transmission beam is any one of the transmission beams of the second communication device. The second transmission beam may be the same as or different from the first transmission beam.

[0355] The second reference signal can be an uplink reference signal or a downlink reference signal. For example, if the first communication device is a terminal, the second reference signal is a downlink reference signal, such as CSI-RS. For another example, if the first communication device is a network device, the second reference signal is an uplink reference signal. Or other possible reference signals, which are not described here. For the first communication device, the second reference signal is sent by the second communication device on the first transmit beam. The second receive beam set includes: receive beams corresponding to multiple pointing angles in the first polarization direction.

[0356] The second receiving beam is used for the first communication device to receive data. The second receiving beam is a receiving beam in the second receiving beam set that has the highest signal strength for receiving the second reference signal.

[0357] For the implementation principle of S1502, please refer to the relevant introduction of S1605, S1705, S1805, or S1905 below, which will not be repeated here.

[0358] Based on the beam management method provided in Figure 15, the first communication device can determine a first receiving beam with a polarization direction as the first polarization direction from receiving beams corresponding to one polarization direction and multiple pointing angles, and receive a reference signal on each receiving beam in the first polarization direction and multiple pointing angles of the first communication device, so as to determine the receiving beam with the largest signal strength of the second reference signal received from each receiving beam corresponding to each of the multiple pointing angles in the first polarization direction as the second receiving beam, that is, selecting a receiving beam from receiving beams with multiple pointing angles, and performing beam management when antennas with three polarization directions are set in the terminal and / or network device.

[0359] Furthermore, the beam management method provided in Figure 15 can determine a first receive beam on a beam with a pointing angle corresponding to three polarization directions, receive a reference signal based on the first receive beam, and determine a second receive beam. This allows the polarization direction of the receive beam to match the polarization direction of the signal, thereby improving communication efficiency. This avoids the first communication device receiving reference signals on all receive beams, reducing the complexity of the beam management process and thereby lowering resource overhead.

[0360] The beam management method provided in FIG15 is further explained below in combination with subdivided scenarios.

[0361] In scenario 2.1, the first communication device is a terminal, and the polarization direction of the first communication device includes three polarization directions, and the second communication device is a network device. For example, the first communication device and the second communication device are shown in (a) of Figure 8. In this case, the process of the beam management method is shown in Figure 16. The beam management method provided in Figure 16 includes:

[0362] S1601: The first communication device sends information #1, ie, ninth information. Correspondingly, the second communication device receives information #1.

[0363] The information #1 is used to indicate the number of receiving antennas on the first communication device and the number of polarization directions of the receiving antennas on the first communication device.

[0364] In a possible implementation, information #1 is also used to indicate beam configuration.

[0365] S1602: The second communication device sends information #2, i.e., the tenth information. Correspondingly, the first communication device receives information #2.

[0366] Among them, information #2 is determined by the second communication device based on the ninth information, and information #2 is used to indicate the number of pointing angles and polarization directions of the receiving beam for beam management by the first communication device.

[0367] For the implementation principles of S1601 and S1602, please refer to the relevant introduction of S1101 and S1102, which will not be repeated here.

[0368] S1603: The second communication device sends information #3, namely, the first information. Correspondingly, the first communication device receives information #3.

[0369] Information #3 is used to indicate that the first reference signal is received on the receiving beams corresponding to the three polarization directions at the same pointing angle.

[0370] In this way, the process of receiving the first reference signal and determining the first receive beam can be triggered by the second communication device, which can improve the flexibility of the beam management process.

[0371] S1604: The second communication device transmits a first reference signal on the first transmit beam. Correspondingly, the first communication device receives the first reference signal on each receive beam in the first receive beam set and determines the first receive beam.

[0372] Among them, the implementation principles of the first transmit beam, the first reference signal, the first receive beam set and the first receive beam can refer to the relevant introduction in S1501 and will not be repeated here.

[0373] When S1603 is executed, S1604 may be executed after S1603, wherein the first communication device receives the first reference signal on each receive beam in the first receive beam set and determines the first receive beam, including: the first communication device receives the first reference signal on each receive beam in the first receive beam set according to the first information and determines the first receive beam. In other words, the execution process of the first communication device receiving the first reference signal on each receive beam in the first receive beam set and determining the first receive beam may be triggered by information #3.

[0374] In the case that S1603 is not executed, the execution timing of S1604 may be agreed upon in the protocol, for example, S1604 may be executed at the first time interval from the completion of S1602.

[0375] S1605: The second communication device transmits a second reference signal on the second transmit beam. Correspondingly, the first communication device receives the second reference signal on each receive beam in the second receive beam set and determines the second receive beam.

[0376] For the implementation of the second transmit beam, the second reference signal, the second receive beam set, and the second receive beam, please refer to the relevant introduction of S1502. For the implementation of S1605, please refer to the relevant introduction of S1502, and no further details are given.

[0377] In some possible implementation schemes, before S1605, the second communication device may further send information for indicating that a second reference signal is received on a receive beam corresponding to each of the multiple pointing angles in the same polarization direction. Accordingly, the first communication device may receive information for indicating that a second reference signal is received on a receive beam corresponding to each of the multiple pointing angles in the same polarization direction. In this case, the execution timing of S1605 may be after the second communication device may further send information for indicating that a second reference signal is received on a receive beam corresponding to each of the multiple pointing angles in the same polarization direction. Accordingly, the first communication device may receive information for indicating that a second reference signal is received on a receive beam corresponding to each of the multiple pointing angles in the same polarization direction.

[0378] S1606: The second communication device sends information #4, ie, third information. Correspondingly, the first communication device receives information #4.

[0379] Information #4 is used to indicate that the third reference signal is received on one receive beam.

[0380] It should be understood that S1606 is an optional step.

[0381] S1607: The second communication device transmits a third reference signal on each transmit beam in the first transmit beam set. Correspondingly, the first communication device receives the third reference signal on the third receive beam and determines the third transmit beam.

[0382] In a possible implementation, the beam management method provided in FIG16 may further include S1608.

[0383] S1608: The first communication device sends information #5. Correspondingly, the second communication device receives information #5.

[0384] Among them, information #5 is used to indicate the third transmitting beam.

[0385] In a possible implementation, the beam management method provided in FIG16 may further include S1609.

[0386] S1609: The second communication device transmits data on the third transmit beam. Correspondingly, the first communication device receives data on the second receive beam.

[0387] For the names in S1606 to S1609, please refer to the relevant introduction in S1106 to S1109. For the implementation of S1606 to S1609, please refer to the relevant introduction in S1106 to S1109. No further details will be given here.

[0388] In scenario 2.2, the first communication device is a network device, and the polarization direction of the first communication device includes three polarization directions. The second communication device is a terminal. For example, the first communication device and the second communication device are shown in (b) of Figure 8. In this case, the process of the beam management method is shown in Figure 17. The beam management method provided in Figure 17 includes:

[0389] S1701: The second communication device sends information #1, i.e., the eleventh information. Correspondingly, the first communication device receives information #1.

[0390] The information #1 is used to indicate the number of transmitting antennas on the second communication device and the number of polarization directions of the transmitting antennas on the second communication device.

[0391] In a possible implementation, information #1 is also used to indicate beam configuration.

[0392] S1702: The first communication device sends information #2, i.e., the twelfth information. Correspondingly, the second communication device receives information #2.

[0393] Information #2 is determined based on information #1, and information #2 is used to indicate the number of pointing angles and polarization directions of the transmission beam for beam management by the second communication device.

[0394] For the implementation principles of S1701 and S1702, please refer to the relevant introduction of S1201 and S1202, which will not be repeated here.

[0395] S1703: The first communication device sends information #3, ie, the second information. Correspondingly, the second communication device receives information #3.

[0396] Information #3 is used to indicate that the first reference signal is sent on a transmit beam.

[0397] In this way, the process of receiving the first reference signal and determining the first receiving beam can be triggered by the first communication device, which can improve the flexibility of the beam management process.

[0398] It should be understood that in the embodiment of the present application, S1703 may not be executed.

[0399] S1704: The second communication device transmits a first reference signal on the first transmit beam. Correspondingly, the first communication device receives the first reference signal on each receive beam in the first receive beam set and determines the first receive beam.

[0400] For the implementation of the first transmit beam, the first reference signal, the first receive beam set and the first receive beam, reference may be made to the relevant introduction in S1501 and will not be repeated here.

[0401] For the implementation of S1704, please refer to the relevant introduction of S1604. The difference is that the execution timing of S1704 can be after S1703.

[0402] S1705: The second communication device transmits a second reference signal on the second transmit beam. Correspondingly, the first communication device receives the second reference signal on each receive beam in the second receive beam set and determines the second receive beam.

[0403] For the implementation of the second transmit beam, the second reference signal, the second receive beam set and the second receive beam, please refer to the relevant introduction in S1502. For the implementation of S1705, please refer to the relevant introduction in S1502, and no further details are given.

[0404] S1706: The first communication device sends information #4, the fourth information. Correspondingly, the second communication device receives information #4.

[0405] Information #4 is used to instruct that the third reference signal be sent on the transmission beams corresponding to the multiple pointing angles.

[0406] S1707: The second communication device transmits a third reference signal on each transmit beam in the first transmit beam set. Correspondingly, the first communication device receives the third reference signal on the third receive beam and determines the third transmit beam.

[0407] S1708: The first communication device sends information #5. Correspondingly, the second communication device receives information #5.

[0408] Among them, information #5 is used to indicate the third transmitting beam.

[0409] In a possible implementation, the beam management method provided in FIG17 may further include S1709.

[0410] S1709: The second communication device transmits data on the third transmit beam. Correspondingly, the first communication device receives data on the second receive beam.

[0411] For the names in S1706 to S1709, please refer to the relevant introduction of S1206 to S1209. For the implementation of S1706 to S1709, please refer to the relevant introduction of S1206 to S1209. No further details will be given here.

[0412] In scenario 2.3, the first communication device is a terminal, and the polarization direction of the first communication device includes three polarization directions. The second communication device is a network device, and the polarization direction of the second communication device includes three polarization directions. For example, the first communication device and the second communication device are shown in (c) of Figure 8. In this case, the process of the beam management method is shown in Figure 18. The beam management method provided in Figure 18 includes:

[0413] S1801: The first communication device sends information #1, ie, ninth information. Correspondingly, the second communication device receives information #1.

[0414] S1802: The second communication device sends information #2, i.e., the tenth information. Correspondingly, the first communication device receives information #2.

[0415] The tenth information is determined by the second communication device based on the ninth information, and the tenth information is used to indicate the number of pointing angles and polarization directions of the receiving beam for beam management by the first communication device.

[0416] S1803: The second communication device sends information #3, namely, the first information. Correspondingly, the first communication device receives information #3.

[0417] S1804: The second communication device transmits a first reference signal on a first transmit beam. Correspondingly, the first communication device receives the first reference signal on each receive beam in the first receive beam set and determines a first receive beam.

[0418] S1805: The second communication device transmits a second reference signal on the second transmit beam. Correspondingly, the first communication device receives the second reference signal on each receive beam in the second receive beam set and determines the second receive beam.

[0419] For the names in S1801 to S1805, please refer to the relevant introduction in S1601 to S1605. For the implementation of S1801 to S1805, please refer to the relevant introduction in S1601 to S1605. No further details are given here.

[0420] S1806: The second communication device sends information #4, ie, the fifth information. Correspondingly, the first communication device receives information #4.

[0421] S1807: The second communication device transmits a fourth reference signal on each transmit beam in the second transmit beam set. Correspondingly, the first communication device receives the fourth reference signal on the fourth receive beam and determines the fourth transmit beam.

[0422] S1808: The second communication device sends information #5, ie, the seventh information. Correspondingly, the first communication device receives information #5.

[0423] S1809: The second communication device transmits a fifth reference signal on each transmit beam in the third transmit beam set. Correspondingly, the first communication device receives the fifth reference signal on the fifth receive beam and determines the fifth transmit beam.

[0424] In a possible implementation, the beam management method provided in FIG18 may further include S1810.

[0425] S1810: The first communication device sends information #6. Correspondingly, the second communication device receives information #6.

[0426] In a possible implementation, the beam management method provided in FIG18 may further include S1811.

[0427] S1811: The second communication device transmits data on the fifth transmit beam. Correspondingly, the first communication device receives data on the second receive beam.

[0428] For the names in S1806 to S1811, please refer to S1306 to S1311. For the implementation of S1806 to S1811, please refer to the relevant introduction of S1306 to S1311, which will not be repeated here.

[0429] In scenario 2.4, the first communication device is a network device, and the polarization direction of the first communication device includes three polarization directions. The second communication device is a terminal, and the polarization direction of the second communication device includes three polarization directions. For example, the first communication device and the second communication device are shown in (c) of Figure 8. In this case, the process of the beam management method is shown in Figure 19. The beam management method provided in Figure 19 includes:

[0430] S1901: The second communication device sends information #1, i.e., the eleventh information. Correspondingly, the first communication device receives information #1.

[0431] S1902: The first communication device sends information #2, i.e., the twelfth information. Correspondingly, the second communication device receives information #2.

[0432] S1903: The first communication device sends information #3, ie, the second information. Correspondingly, the second communication device receives information #3.

[0433] S1904: The second communication device transmits a first reference signal on the first transmit beam. Correspondingly, the first communication device receives the first reference signal on each receive beam in the first receive beam set and determines the first receive beam.

[0434] S1905: The second communication device transmits a second reference signal on the second transmit beam. Correspondingly, the first communication device receives the second reference signal on each receive beam in the second receive beam set and determines the second receive beam.

[0435] For the implementation of S1901 to S1905, please refer to the relevant introduction of S1701 to S1705 and will not be described in detail here.

[0436] S1906: The first communication device sends information #4, ie, the sixth information. Correspondingly, the second communication device receives information #4.

[0437] The sixth information is used to instruct that a fourth reference signal be sent on transmit beams corresponding to respective multiple pointing angles in the same polarization direction.

[0438] S1907: The second communication device transmits a fourth reference signal on each transmit beam in the second transmit beam set. Correspondingly, the first communication device receives the fourth reference signal on the fourth receive beam and determines the fourth transmit beam.

[0439] S1908: The first communication device sends information #5, ie, the eighth information. Correspondingly, the second communication device receives information #5.

[0440] S1909: The second communication device transmits a fifth reference signal on each transmit beam in the third transmit beam set. Correspondingly, the first communication device receives the fifth reference signal on the fifth receive beam and determines the fifth transmit beam.

[0441] In a possible implementation, the beam management method provided in FIG19 may further include S1910.

[0442] S1910: The first communication device sends information #6. Correspondingly, the second communication device receives information #6.

[0443] In a possible implementation, the beam management method provided in FIG19 may further include S1911.

[0444] S1911: The second communication device transmits data on the fifth transmit beam. Correspondingly, the first communication device receives data on the second receive beam.

[0445] For the implementation of S1906 to S1911, please refer to the relevant introduction of S1406 to S1411, which will not be repeated here.

[0446] In some other possible embodiments, the polarization direction of one end transmitting a signal, i.e., the first communication device, includes three polarization directions, and the polarization direction of a transmit beam used by the first communication device to transmit data is one of the three polarization directions of the first communication device. In this case, the beam management method may include a process for determining a transmit beam used by the first communication device to transmit data, wherein the beam management process is shown in Scenario 3 or Scenario 4 below.

[0447] Scenario 3. In the beam management process, a transmitting beam with a first pointing angle is first determined from beams corresponding to different pointing angles in a polarization direction of the first communication device, and then a transmitting beam for sending data by the first communication device is determined based on the transmitting beams corresponding to each of the three polarization directions of the first communication device on the first pointing angle.

[0448] As shown in FIG20 , the beam management method includes:

[0449] S2001: A first communication device transmits a first reference signal on each transmit beam in a first transmit beam set. Correspondingly, a second communication device receives the first reference signal on a first receive beam and determines a first transmit beam.

[0450] The polarization direction of the first communication device includes three polarization directions. The first communication device may be a terminal or a network device as shown in Figure 3. For example, in a scenario where the data to be transmitted is sent from a terminal to a network device, the first communication device is a terminal. In another example, in a scenario where the data to be transmitted is sent from a network device to a terminal, the first communication device is a network device. The polarization direction of the first communication device includes three polarization directions. For example, the polarization direction of the first communication device may include the polarization directions shown in Figures 5 to 8.

[0451] The second communication device may be a terminal or a network device as shown in Figure 3. For example, in a scenario where the data to be received is sent from the network device to the terminal, the second communication device is the network device. For another example, in a scenario where the data to be received is sent from the terminal to the network device, the second communication device is the terminal. The polarization directions of the second communication device may include two polarization directions or three polarization directions. For example, the polarization directions of the second communication device may include two polarization directions or three polarization directions as shown in any of Figures 5 to 8.

[0452] The first transmission beam set includes: transmission beams corresponding to multiple pointing angles in a first polarization direction, and the first polarization direction is one of the three polarization directions of the first communication device.

[0453] The first reference signal may be an uplink reference signal or a downlink reference signal. For example, if the first communication device is a terminal, the first reference signal may be a downlink reference signal, such as a CSI-RS. For another example, if the first communication device is a network device, the first reference signal may be an uplink reference signal.

[0454] The first receiving beam is any receiving beam in the receiving beam set of the second communication device. In a possible implementation scheme, the receiving beam of the second communication device may not distinguish the polarization direction. In this case, one transmitting beam in the transmitting beam set corresponds to a pointing angle of the second communication device. In other words, a transmitting beam at one pointing angle is one transmitting beam. In a possible implementation scheme, the receiving beam of the second communication device may distinguish the polarization direction. In this case, the transmitting beam set includes beams corresponding to each polarization direction and each pointing angle of the second communication device. One beam in the transmitting beam set corresponds to one polarization direction and one pointing angle of the second communication device, that is, a transmitting beam on the combination of one polarization direction and one pointing angle of the second communication device is one transmitting beam.

[0455] The first transmit beam is a transmit beam in the first transmit beam set. The first transmit beam is determined by the second communication device based on the first reference signal. For example, the first transmit beam is the transmit beam in the first transmit beam set that has the highest received signal strength of the first reference signal. The angle of the first transmit beam is the first pointing angle.

[0456] It should be understood that in the embodiments of the present application, for a transmit beam, such as the first transmit beam, one transmit beam corresponds to one polarization direction and one pointing angle. Alternatively, one polarization direction and one pointing angle correspond to one transmit beam. For example, the first transmit beam corresponds to the first polarization direction and the first pointing angle.

[0457] S2002: The second communication device sends first information. Correspondingly, the first communication device receives the first information.

[0458] The first information is used to indicate a first transmit beam.

[0459] S2003: The first communication device transmits a second reference signal on each transmit beam in the second transmit beam set. Correspondingly, the second communication device receives the second reference signal on the second receive beam and determines the second transmit beam.

[0460] The second transmission beam set includes: transmission beams corresponding to the three polarization directions of the first communication device at the first pointing angle.

[0461] The first reference signal may be an uplink reference signal. For the second communication device, the second reference signal is transmitted by the first communication device on each transmission beam in the second transmission beam set.

[0462] The second receiving beam is any receiving beam in the receiving beam set of the second communication device. The second receiving beam and the first receiving beam can be the same receiving beam or two different receiving beams.

[0463] The second transmission beam is the transmission beam in the second transmission beam set that sends the fifth reference signal with the largest received signal strength, that is, the transmission beam corresponding to when the second communication device receives the fifth reference signal with the largest signal strength. The second transmission beam is used by the first communication device to send data.

[0464] The second transmission beam is determined by the second communication device according to the first reference signal and the second reference signal, and the second transmission beam is used by the first communication device to transmit a signal.

[0465] S2004: The second communication device sends second information. Correspondingly, the first communication device receives the second information.

[0466] The second information is used to indicate the second transmit beam.

[0467] Based on the beam management method provided in Figure 20, the first communication device can send a first reference signal on the transmitting beams corresponding to the multiple pointing angles in the first polarization direction to determine the first transmitting beam, and send a second reference signal on the transmitting beams corresponding to the pointing angles of the first transmitting beam and the three polarization directions to obtain the second transmitting beam, that is, select the transmitting beam from the transmitting beams in multiple polarization directions, and perform beam management when antennas in three polarization directions are set in the terminal and / or network equipment.

[0468] In addition, the beam management method provided in Figure 20 can send a first reference signal on a transmitting beam corresponding to a polarization direction and multiple pointing angles, and send a second reference signal on a transmitting beam corresponding to a pointing angle and each of the three polarization directions. In this way, the polarization direction of the transmitting beam can be matched with the polarization direction of the signal, thereby improving communication efficiency, and avoiding the first communication device from sending reference signals on all transmitting beams, reducing the complexity of the beam management process, and thus reducing resource overhead.

[0469] In scenario 3.1, the first communication device is a terminal, and the polarization direction of the first communication device includes three polarization directions. The second communication device is a network device. For example, the first communication device and the second communication device are shown in (a) of Figure 8. In this case, the process of the beam management method is shown in Figure 21. The beam management method provided in Figure 21 includes:

[0470] S2101: The first communication device sends information #1, i.e., the eleventh information. Correspondingly, the second communication device receives information #1.

[0471] The information #1 is used to indicate the number of transmitting antennas on the first communication device and the number of polarization directions of the transmitting antennas on the first communication device.

[0472] In a possible implementation, information #1 may include the number of transmitting antennas on the first communication device.

[0473] In one possible implementation, information #1 may include the number of polarization directions of the receiving antenna on the first communication device, or information #1 may include the index of each polarization direction of the transmitting antenna on the first communication device. The index of each polarization direction of the transmitting antenna on the first communication device is the index of the polarization direction of the transmitting antenna on the first communication device.

[0474] In a possible implementation, information #1 is also used to indicate beam configuration.

[0475] S2102: The second communication device sends information #2, i.e., the twelfth information. Correspondingly, the first communication device receives information #2.

[0476] Information #2 is determined based on information #1, and information #2 is used to indicate the number of pointing angles and polarization directions of the transmitting beam for beam management by the first communication device.

[0477] The number of polarization directions of the transmit beams for which beam management is performed by the first communication device is less than or equal to the number of polarization directions of the transmit antennas on the first communication device. If the number of polarization directions of the transmit beams for which beam management is performed by the first communication device is equal to the number of polarization directions of the transmit antennas on the first communication device, the following steps of S2103 may be performed to perform beam management.

[0478] Alternatively, information #2 is used to indicate the pointing angle and polarization direction of the transmit beam for beam management by the first communication device. The polarization directions of the transmit beam for beam management by the first communication device are at least some of the polarization directions on the first communication device. If the polarization directions of the transmit beam for beam management by the first communication device are the three polarization directions on the first communication device, the following steps of S2103 may be performed to perform beam management.

[0479] In this way, the second communication device can configure the pointing angle and the number of polarization directions of the transmission beam for beam management of the first communication device according to the number of polarization directions of the transmission antenna on the first communication device, thereby improving flexibility.

[0480] S2103: The second communication device sends information #3, i.e., third information. Correspondingly, the first communication device receives information #3.

[0481] Information #3 is used to indicate that a first reference signal is sent on a transmission beam corresponding to each of multiple pointing angles in the same polarization direction.

[0482] In this way, the process of sending the first reference signal can be triggered by the second communication device, which can improve the flexibility of the beam management process.

[0483] It should be understood that S2103 is an optional step.

[0484] S2104: The first communication device transmits a first reference signal on each transmit beam in the first transmit beam set. Correspondingly, the second communication device receives the first reference signal on the first receive beam and determines the first transmit beam.

[0485] For the implementation of the first transmit beam set, the first reference signal, the first receive beam, and the first transmit beam, please refer to the relevant introduction of S2001.

[0486] In the case of executing S2103, S2104 can be executed after S2103, wherein the first communication device sends a first reference signal on each transmission beam in the first transmission beam set, which may include: the first communication device sends a first reference signal beam on each transmission beam in the first transmission beam set according to information #3.

[0487] In the case that S2103 is not executed, the execution timing of S2104 may be agreed upon in the protocol, for example, S2104 may be executed at the first time interval from the completion of S2102.

[0488] S2105: The second communication device sends information #4, namely, the first information. Correspondingly, the first communication device receives information #4.

[0489] For the implementation of S2105, please refer to the relevant introduction of S2002.

[0490] S2106: The first communication device transmits a second reference signal on each transmit beam in the second transmit beam set. Correspondingly, the second communication device receives the second reference signal on the second receive beam and determines a second transmit beam.

[0491] For the implementation of the second transmit beam set, the second reference signal, the second receive beam, and the second transmit beam, please refer to the relevant introduction of S2003. For the implementation of S2106, please refer to the relevant introduction of S2003.

[0492] For the implementation of S2106, please refer to the relevant introduction of S2104. The difference is that the execution timing of S2106 can be after S2105.

[0493] S2107: The second communication device sends information #5, i.e., second information. Correspondingly, the first communication device receives information #5.

[0494] For the implementation of S2107, please refer to the relevant introduction of S2004.

[0495] S2108: The second communication device sends information #6, ie, the fifth information. Correspondingly, the first communication device receives information #6.

[0496] Information #6 is used to indicate that a third reference signal is transmitted on a transmit beam.

[0497] In this way, the process of sending the third reference signal can be triggered by the second communication device, which can improve the flexibility of beam management.

[0498] It should be understood that in the embodiment of the present application, S2108 is an optional step.

[0499] S2109: The first communication device transmits a third reference signal on the third transmit beam. Correspondingly, the second communication device receives the third reference signal on each receive beam in the first receive beam set and determines a third receive beam.

[0500] The third transmit beam is any one of a set of transmit beams of the first communication device. The set of transmit beams includes transmit beams configured on the first communication device. The third transmit beam may be agreed upon by a protocol or determined by the first communication device from the set of transmit beams of the first communication device.

[0501] The third reference signal is used to determine a receive beam for the second communication device to receive data. The third reference signal is transmitted by the first communication device on a third transmit beam.

[0502] The first receive beam set includes multiple receive beams, that is, a set of receive beams configured on the second communication device.

[0503] The third receiving beam is a beam in the first receiving beam set. For example, the third receiving beam may be a receiving beam set in the first receiving beam set that receives the third reference signal with the greatest signal strength.

[0504] In the case of executing S2108, S2109 may be executed after S2108, wherein the first communication device sends a third reference signal on a third transmission beam, including: the first communication device sends the third reference signal on the third transmission beam according to information #6.

[0505] In the case that S2108 is not executed, the execution timing of S2109 may be agreed upon in the protocol, for example, S2109 may be executed at the first time interval from the completion of S1102.

[0506] In a possible implementation, the method provided in FIG. 21 may further include S2110.

[0507] That is to say, the first communication device can send a reference signal on a transmitting beam, such as the third reference signal mentioned above, so that the second communication device can obtain the signal strength of the third reference signal received on different receiving beams, thereby determining the receiving beam used by the second communication device to receive data.

[0508] S2110: The first communication device transmits data on the second transmit beam, and correspondingly, the second communication device receives data on the third receive beam.

[0509] In scenario 3.2, the first communication device is a network device, and the polarization direction of the first communication device includes three polarization directions, and the second communication device is a terminal. For example, the first communication device and the second communication device are shown in (b) of Figure 8. In this case, the process of the beam management method is shown in Figure 22. The beam management method provided in Figure 22 includes:

[0510] S2201: The second communication device sends information #1, i.e., the thirteenth information. Correspondingly, the first communication device receives information #1.

[0511] The information #1 is used to indicate the number of receiving antennas on the second communication device and the number of polarization directions of the receiving antennas on the second communication device.

[0512] In a possible implementation, information #1 may include the number of receiving antennas on the second communication device.

[0513] In one possible implementation, information #1 may include the number of polarization directions of the receiving antenna on the second communication device, or information #1 may include the index of each polarization direction of the receiving antenna on the second communication device. The index of each polarization direction of the receiving antenna on the second communication device is the index of the polarization direction of the receiving antenna on the second communication device.

[0514] In a possible implementation, information #1 is also used to indicate beam configuration.

[0515] S2202: The first communication device sends information #2, i.e., the fourteenth information. Correspondingly, the second communication device receives information #2.

[0516] Information #2 is determined based on information #1, and information #2 is used to indicate the number of pointing angles and polarization directions of the receiving beam for beam management by the second communication device.

[0517] The number of polarization directions of the receive beams for which the second communication device performs beam management is less than or equal to the number of polarization directions of the receive antennas on the second communication device. If the number of polarization directions of the receive beams for which the second communication device performs beam management is equal to the number of polarization directions of the receive antennas on the second communication device, the following steps of S2203 may be performed to perform beam management.

[0518] Alternatively, information #2 is used to indicate the polarization direction of the receive beam for beam management by the second communication device. The polarization directions for beam management by the second communication device are at least some of the polarization directions on the second communication device. If the polarization directions for beam management by the second communication device are the three polarization directions on the second communication device, the following steps of S2203 may be performed to perform beam management.

[0519] In this way, the first communication device can configure the direction angle and the number of polarization directions of the receiving beam for beam management by the second communication device according to the number of polarization directions of the receiving antenna on the first communication device, thereby improving flexibility.

[0520] S2203: The first communication device sends information #3, ie, fourth information. Correspondingly, the second communication device receives information #3.

[0521] Information #3 is used to indicate that the first reference signal is received on a receiving beam.

[0522] In this way, the process of sending the first reference signal can be triggered by the first communication device, which can improve the flexibility of the beam management process.

[0523] It should be understood that S2203 is an optional step.

[0524] S2204: The first communication device transmits a first reference signal on each transmit beam in the first transmit beam set. Correspondingly, the second communication device receives the first reference signal on the first receive beam and determines the first transmit beam.

[0525] For the implementation of the first transmit beam set, the first reference signal, the first receive beam and the first transmit beam, reference may be made to the relevant introduction of S2001. For the implementation of S2204, reference may be made to the relevant introduction of S2001.

[0526] In which, when executing S2203, S2204 can be executed after S2203, wherein the second communication device receives the first reference signal on the first receiving beam and determines the first transmitting beam, including: the second communication device receives the first reference signal on the first receiving beam according to the fourth information and determines the first transmitting beam.

[0527] In the case that S2203 is not executed, the execution timing of S2204 may be agreed upon in the protocol, for example, S2204 may be executed at the first time interval from the completion of S2202.

[0528] S2205: The second communication device sends information #4, namely, the first information. Correspondingly, the first communication device receives information #4.

[0529] For the implementation of S2205, please refer to the relevant introduction of S2002.

[0530] S2206: The first communication device transmits a second reference signal on each transmit beam in the second transmit beam set. Correspondingly, the second communication device receives the second reference signal on the second receive beam and determines a second transmit beam.

[0531] For the implementation of the second transmit beam set, the second reference signal, the second receive beam and the second transmit beam, please refer to the relevant introduction of S2003. For the implementation of S2206, please refer to the relevant introduction of S2106, and no further details will be given.

[0532] S2207: The second communication device sends information #5, i.e., second information. Correspondingly, the first communication device receives information #5.

[0533] For the implementation of S2207, please refer to the relevant introduction of S2004.

[0534] S2208: The first communication device sends information #6, ie, the sixth information. Correspondingly, the second communication device receives information #6.

[0535] Information #6 is used to indicate receiving the third reference signal on multiple receiving beams.

[0536] In this way, the process of sending the third reference signal can be triggered by the first communication device, which can improve the flexibility of beam management.

[0537] S2209: The first communication device transmits a third reference signal on the third transmit beam. Correspondingly, the second communication device receives the third reference signal on each receive beam in the first receive beam set and determines a third receive beam.

[0538] For the implementation of the third transmit beam, the third reference signal, the first receive beam set and the third receive beam, please refer to the relevant introduction in S2109. For the implementation of S2209, please refer to the relevant introduction in S2109. The difference is that the execution timing of S2209 can be after S2208.

[0539] In a possible implementation, the method provided in FIG. 22 may further include S2210.

[0540] S2210: The first communication device transmits data on the second transmit beam, and the second communication device receives data on the third receive beam.

[0541] In scenario 3.3, the first communication device is a terminal, and the polarization direction of the first communication device includes three polarization directions. The second communication device is a network device, and the polarization direction of the second communication device includes three polarization directions. For example, the first communication device and the second communication device are shown in (c) of Figure 8. In this case, the process of the beam management method is shown in Figure 23. The beam management method provided in Figure 23 includes:

[0542] S2301: The first communication device sends information #1, i.e., the eleventh information. Correspondingly, the second communication device receives information #1.

[0543] S2302: The second communication device sends information #2, i.e., the twelfth information. Correspondingly, the first communication device receives information #2.

[0544] S2303: The second communication device sends information #3, i.e., third information. Correspondingly, the first communication device receives information #3.

[0545] S2304: The first communication device transmits a first reference signal on each transmit beam in the first transmit beam set. Correspondingly, the second communication device receives the first reference signal on the first receive beam and determines the first transmit beam.

[0546] S2305: The second communication device sends information #4, namely, the first information. Correspondingly, the first communication device receives information #4.

[0547] S2306: The first communication device transmits a second reference signal on each transmit beam in the second transmit beam set. Correspondingly, the second communication device receives the second reference signal on the second receive beam and determines a second transmit beam.

[0548] S2307: The second communication device sends information #5, ie, the second information. Correspondingly, the first communication device receives information #5.

[0549] For the names in S2301 to S2307, please refer to the relevant introduction in S2101 to S2107. For the implementation of S2301 to S2307, please refer to the relevant introduction in S2101 to S2107. No further details will be given.

[0550] S2308: The first communication device receives information #6, ie, the seventh information. Correspondingly, the second communication device sends information #6.

[0551] Information #6 is used to indicate that the fourth reference signal is sent on a transmit beam.

[0552] In this way, the process of sending the fourth reference signal can be triggered by the second communication device, which can improve the flexibility of beam management.

[0553] It should be understood that S2308 is an optional step.

[0554] S2309: The first communication device transmits a fourth reference signal on a fourth transmit beam. Correspondingly, the second communication device receives the fourth reference signal on a second receive beam set and determines a fourth receive beam.

[0555] The fourth transmission beam is one of the transmission beams configured on the first communication device.

[0556] The fourth reference signal is used to determine the pointing angle of the receiving beam of the second communication device for receiving data. For the second communication device, the fourth reference signal is sent by the first communication device on the fourth transmitting beam.

[0557] The second receive beam set is a receive beam corresponding to multiple pointing angles in the same polarization direction. The fourth receive beam is a beam in the second receive beam set. The pointing angle of the fourth receive beam is the first pointing angle.

[0558] For the implementation of S2309, please refer to the relevant introduction of S2109. The difference is that the execution timing of S2309 can be after S2309.

[0559] S2310: The second communication device sends information #7, ie, the ninth information. Correspondingly, the first communication device receives information #7.

[0560] In a possible implementation, information #7 is used to indicate that the fifth reference signal is sent on a transmit beam.

[0561] In this way, the process of sending the fifth reference signal can be triggered by the second communication device, which can improve the flexibility of beam management.

[0562] S2311: The first communication device transmits a fifth reference signal on a fifth transmit beam. Correspondingly, the second communication device receives the fifth reference signal on a third receive beam set and determines a fifth receive beam.

[0563] The fifth transmission beam is one of the transmission beams configured on the first communication device. The fifth transmission beam and the fourth transmission beam can be the same transmission beam or two different transmission beams.

[0564] The fifth reference signal is used to determine the polarization direction of the receiving beam used by the second communication device to receive data. The fifth reference signal is sent by the first communication device on the fifth transmitting beam.

[0565] The third receiving beam set includes a plurality of receiving beams corresponding to the three polarization directions of the second communication device at the first pointing angle. The fifth receiving beam is the receiving beam in the third receiving beam set that receives the fifth reference signal with the highest signal strength.

[0566] For the implementation of S2311, please refer to the relevant introduction of S2109. The difference is that the execution timing of S2311 may be in a possible implementation scheme after S2310. The method provided in Figure 23 may also include S2312.

[0567] S2312: The first communication device transmits data on the second transmit beam, and correspondingly, the second communication device receives data on the fifth receive beam.

[0568] In scenario 3.4, the first communication device is a network device, and the polarization direction of the first communication device includes three polarization directions. The second communication device is a terminal, and the polarization direction of the second communication device includes three polarization directions. For example, the first communication device and the second communication device are shown in (c) of Figure 8. In this case, the process of the beam management method is shown in Figure 24. The beam management method provided in Figure 24 includes:

[0569] S2401: The second communication device sends information #1, i.e., the thirteenth information. Correspondingly, the first communication device receives information #1.

[0570] S2402: The first communication device sends information #2, i.e., the fourteenth information. Correspondingly, the second communication device receives information #2.

[0571] In this way, the first communication device can configure the direction angle and the number of polarization directions of the receiving beam for beam management by the second communication device according to the number of polarization directions of the receiving antenna on the first communication device, thereby improving flexibility.

[0572] S2403: The first communication device sends information #3, ie, fourth information. Correspondingly, the second communication device receives information #3.

[0573] S2404: The first communication device transmits a first reference signal on each transmit beam in the first transmit beam set. Correspondingly, the second communication device receives the first reference signal on the first receive beam and determines the first transmit beam.

[0574] S2405: The second communication device sends information #4, namely, the first information. Correspondingly, the first communication device receives information #4.

[0575] S2406: The first communication device transmits a second reference signal on each transmit beam in the second transmit beam set. Correspondingly, the second communication device receives the second reference signal on the second receive beam and determines the second transmit beam.

[0576] S2407: The second communication device sends information #5, i.e., the second information. Correspondingly, the first communication device receives information #5.

[0577] For the names in S2401 to S2407, please refer to the relevant introduction of S2201 to S2207. For the implementation of S2401 to S2407, please refer to the relevant introduction of S2201 to S2207 respectively, and no further details will be given.

[0578] S2408: The first communication device sends information #6, ie, the eighth information, and the second communication device receives information #6.

[0579] Information #6 is used to indicate that a fourth reference signal is received on receiving beams corresponding to multiple pointing angles in the same polarization direction.

[0580] In this way, the process of sending the fourth reference signal can be triggered by the first communication device, which can improve the flexibility of beam management.

[0581] It should be understood that S2408 is an optional step.

[0582] S2409: The first communication device transmits a fourth reference signal on a fourth transmit beam. Correspondingly, the second communication device receives the fourth reference signal on a second receive beam set and determines a fourth receive beam.

[0583] For the implementation of the fourth transmit beam, the fourth reference signal, the second receive beam set and the fourth receive beam, please refer to the relevant introduction of S2309. For the implementation of S2409, please refer to the relevant introduction of S2309. The difference is that the execution timing of S2409 can be after S2408.

[0584] S2410: The first communication device sends information #7, i.e., the tenth information. Correspondingly, the second communication device receives information #7.

[0585] Information #7 is used to instruct to receive the fifth reference signal on the receiving beams corresponding to the three polarization directions of the second communication device at the same pointing angle.

[0586] In this way, the process of sending the fifth reference signal can be triggered by the first communication device, which can improve the flexibility of beam management.

[0587] It should be understood that S2410 is an optional step.

[0588] S2411: The first communication device transmits a fifth reference signal on a fifth transmit beam. Correspondingly, the second communication device receives the fifth reference signal on a third receive beam set and determines a fifth receive beam.

[0589] The fifth reference signal is used to determine the polarization direction of the receiving beam of the second communication device for receiving data. For the second communication device, the fifth reference signal is sent by the first communication device on the fifth transmitting beam.

[0590] For the implementation of the fifth transmit beam, the third receive beam set and the fifth receive beam, please refer to the relevant introduction of S2311. For the implementation of S2411, please refer to the relevant introduction of S2311. The difference is that the execution timing of S2411 can be after S2410.

[0591] In a possible implementation, the method provided in FIG. 24 may further include S2412.

[0592] S2412: The first communication device transmits data on the second transmit beam, and correspondingly, the second communication device receives data on the fifth receive beam.

[0593] In scenario 4, in the beam management process, a transmit beam with a first polarization direction is first determined from beams corresponding to different polarization directions at a pointing angle of the first communication device. Then, a transmit beam for transmitting data by the first communication device is determined based on the transmit beams corresponding to different pointing angles of the first communication device in the first polarization direction. The following is an explanation of this with reference to FIG25. As shown in FIG25, the beam management method includes:

[0594] S2501: A first communication device transmits a first reference signal on each transmit beam in a first transmit beam set. Correspondingly, a second communication device receives the first reference signal on a first receive beam and determines a first transmit beam.

[0595] For the implementation of the first communication device and the second communication device, please refer to the relevant introduction in S2001 and will not be described in detail.

[0596] In one possible implementation, the receiving beam of the second communication device may not distinguish polarization directions. In this case, one receiving beam in the receiving beam set corresponds to one pointing angle of the second communication device. In other words, a receiving beam at one pointing angle is one receiving beam.

[0597] In one possible implementation, the receive beam of the second communication device can distinguish polarization directions. In this case, the receive beam set includes a beam corresponding to each polarization direction and each pointing angle of the second communication device. One receive beam in the receive beam set corresponds to one polarization direction and one pointing angle of the second communication device. That is, the receive beam corresponding to the combination of one polarization direction and one pointing angle of the second communication device constitutes one receive beam.

[0598] The first transmission beam set includes: transmission beams corresponding to the three polarization directions of the first communication device at the first pointing angle.

[0599] The first reference signal is transmitted by the first communication device on each transmission beam in the first transmission beam set. For the second communication device, the first reference signal is transmitted by the first communication device on each transmission beam in the first transmission beam set.

[0600] The first reception beam is one of the reception beams configured on the second communication device.

[0601] The first transmit beam is determined by the second communication device according to the first reference signal. The first transmit beam is a transmit beam in the first transmit beam set. The polarization direction of the first transmit beam is the first polarization direction.

[0602] S2502: The second communication device sends first information. Correspondingly, the first communication device receives the first information.

[0603] The first information is used to indicate a first transmit beam.

[0604] S2503: The first communication device transmits a second reference signal on each transmit beam in the second transmit beam set. Correspondingly, the second communication device receives the second reference signal on the second receive beam and determines the second transmit beam.

[0605] The second transmission beam set includes: transmission beams corresponding to the multiple pointing angles in a first polarization direction, where the first polarization direction is one of the three polarization directions of the first communication device.

[0606] The second reference signal is transmitted by the first communication device on the second set of transmit beams.

[0607] The second receiving beam is any receiving beam in the receiving beam set of the second communication device. The implementation principle of the second receiving beam is similar to that of the first receiving beam. The second receiving beam and the first receiving beam can be the same receiving beam or two different receiving beams.

[0608] The second transmit beam is the transmit beam in the second transmit beam set that has the largest received signal strength of the second reference signal sent, that is, the transmit beam with the largest signal strength of the second reference signal received by the second communication device. The second transmit beam is used by the first communication device to send signals, and the second transmit beam is determined by the second communication device based on the first reference signal and the second reference signal.

[0609] S2504: The second communication device sends the second information. Correspondingly, the first communication device receives the second information.

[0610] The second information is used to indicate a second transmit beam.

[0611] Based on the beam management method provided in Figure 25, the first communication device can send a first reference signal on a transmitting beam corresponding to each of multiple polarization directions at a first pointing angle to determine the first transmitting beam, and send a second reference signal on a transmitting beam corresponding to each of the polarization directions of the first transmitting beam and three pointing angles to obtain a second transmitting beam. Beam management can be performed when antennas with three polarization directions are provided in the terminal and / or network equipment.

[0612] Furthermore, the beam management method provided in Figure 25 can determine a first transmit beam on transmit beams corresponding to three pointing angles in a polarization direction, receive a reference signal based on the first transmit beam, and determine a second transmit beam. This allows the polarization direction of the transmit beam to match the polarization direction of the signal, thereby improving communication efficiency. This avoids the first communication device having to transmit reference signals on all transmit beams, reducing the complexity of the beam management process and thereby lowering resource overhead.

[0613] In scenario 4.1, the first communication device is a terminal, and the polarization direction of the first communication device includes three polarization directions. The second communication device is a network device. For example, the first communication device and the second communication device are shown in (a) of Figure 8. In this case, the process of the beam management method is shown in Figure 26. The beam management method provided in Figure 26 includes:

[0614] S2601: The first communication device sends information #1, ie, the eleventh information, and the second communication device receives information #1.

[0615] The information #1 is used to indicate the number of transmitting antennas on the first communication device and the number of polarization directions of the transmitting antennas on the first communication device.

[0616] In a possible implementation, information #1 is also used to indicate beam configuration.

[0617] S2602: The second communication device sends information #2, ie, the twelfth information, and the first communication device receives information #2.

[0618] Information #2 is determined based on information #1, and information #2 is used to indicate the number of pointing angles and polarization directions of the transmitting beam for beam management by the first communication device.

[0619] Regarding the implementation of S2601 and S2602, please refer to the above-mentioned introduction of S2101 and S2102, which will not be elaborated here.

[0620] S2603: The second communication device sends information #3, i.e., third information. Correspondingly, the first communication device receives information #3.

[0621] The information #3 is used to indicate that the first reference signal is sent on the transmission beams corresponding to the three polarization directions of the first communication device at the same pointing angle.

[0622] It should be understood that S2603 is an optional step.

[0623] S2604: The first communication device transmits a first reference signal on each transmit beam in the first transmit beam set. Correspondingly, the second communication device receives the first reference signal on the first receive beam and determines the first transmit beam.

[0624] Regarding the implementation of the first transmit beam set, the first reference signal, the first receive beam and the first transmit beam, please refer to the relevant introduction of S2501. Regarding the implementation of S2604, please refer to the relevant introduction of S2501, and no further details will be given.

[0625] In the case of executing S2603, S2604 can be executed after S2603, wherein the first communication device sends a first reference signal on each transmission beam in the first transmission beam set, including: the first communication device sends a first reference signal on each transmission beam in the first transmission beam set according to information #3.

[0626] In the case that S2603 is not executed, the execution timing of S2604 may be agreed upon in the protocol, for example, S2604 may be executed at the first time interval from the completion of S2602.

[0627] S2605: The second communication device sends information #4, namely, the first information. Correspondingly, the first communication device receives information #4.

[0628] For the implementation of S2605, please refer to the relevant introduction of S2502.

[0629] S2606: The first communication device transmits a second reference signal on each transmit beam in the second transmit beam set. Correspondingly, the second communication device receives the second reference signal on the second receive beam and determines a second transmit beam.

[0630] For the implementation of the second transmit beam set, the second reference signal, the second receive beam and the second transmit beam, please refer to the relevant introduction of S2504. For the implementation of S2606, please refer to the relevant introduction of S2504. The difference is that the execution timing of S2606 can be after S2605.

[0631] In the case that S2605 is not executed, the execution timing of S2606 may be agreed upon in the protocol, for example, S2606 may be executed at the first time interval from the completion of S2602.

[0632] S2607: The second communication device sends information #5, ie, the second information. Correspondingly, the first communication device receives information #5.

[0633] For the implementation of S2607, please refer to the relevant introduction of S2504.

[0634] S2608: The second communication device sends information #6, the fifth information, and the first communication device receives information #6.

[0635] Among them, the information #6 is used to indicate that a third reference signal is sent on a transmit beam.

[0636] S2609: The first communication device transmits a third reference signal on the third transmit beam. Correspondingly, the second communication device receives the third reference signal on each receive beam in the first receive beam set and determines a third receive beam.

[0637] The third transmission beam is one of the transmission beams configured on the first communication device, that is, one of the transmission beams in the set of transmission beams configured on the first communication device.

[0638] The third reference signal is an uplink reference signal. The third reference signal is used to determine the receive beam for the second communication device to receive data. For the second communication device, the third reference signal is sent by the first communication device on the third transmit beam.

[0639] The first receive beam set includes multiple receive beams, that is, a set of receive beams configured on the second communication device.

[0640] The third receiving beam is a receiving beam in the first receiving beam set. For example, the third receiving beam is a receiving beam in the first receiving beam set that receives the third reference signal with the highest signal strength.

[0641] In which, when executing S2605, S2606 can be executed after S2605, and the first communication device sends a third reference signal on the third transmission beam, including: the first communication device sends the third reference signal on the third transmission beam according to the fifth information.

[0642] In the case that S2605 is not executed, the execution timing of S2606 may be agreed upon in the protocol, for example, S2606 may be executed at the first time interval from the completion of S2602.

[0643] In a possible implementation, the method provided in FIG. 26 may further include S2610.

[0644] S2610: The first communication device transmits data on the second transmit beam, and the second communication device receives data on the third receive beam.

[0645] In scenario 4.2, the first communication device is a network device, and the polarization direction of the first communication device includes three polarization directions, and the second communication device is a terminal. For example, the first communication device and the second communication device are shown in (b) of Figure 8. In this case, the process of the beam management method is shown in Figure 27. The beam management method provided in Figure 27 includes:

[0646] S2701: The second communication device sends information #1, ie, the thirteenth information, and the first communication device receives information #1.

[0647] The information #1 is used to indicate the number of receiving antennas on the second communication device and the number of polarization directions of the receiving antennas on the second communication device.

[0648] In a possible implementation, information #1 is also used to indicate beam configuration.

[0649] S2702: The first communication device sends information #2, ie, the fourteenth information, and the second communication device receives information #2.

[0650] Among them, information #2 is determined based on information #1, and information #2 is used to indicate the number of pointing angles and polarization directions of the transmitting beam for beam management by the first communication device.

[0651] S2703: The first communication device sends information #3, ie, fourth information, and the second communication device receives information #3.

[0652] Information #3 is used to indicate that the first reference signal is received on a receiving beam.

[0653] S2704: The first communication device transmits a first reference signal on each transmit beam in the first transmit beam set. Correspondingly, the second communication device receives the first reference signal on the first receive beam and determines the first transmit beam.

[0654] For the implementation of the first transmit beam set, the first reference signal, the first receive beam and the first transmit beam, please refer to the relevant introduction in S2501. For the implementation of S2704, please refer to the relevant introduction in S2604. The difference is that the execution timing of S2704 can be after S2703.

[0655] S2705: The second communication device sends information #4, namely, the first information. Correspondingly, the first communication device receives information #4.

[0656] For the implementation of S2705, please refer to the relevant introduction of S2502.

[0657] S2706: The first communication device transmits a second reference signal on each transmit beam in the second transmit beam set. Correspondingly, the second communication device receives the second reference signal on the second receive beam and determines a second transmit beam.

[0658] For the implementation of the second transmit beam set, the second reference signal, the second receive beam and the second transmit beam, please refer to the relevant introduction of S2606. For the implementation of S2706, please refer to the relevant introduction of S2604. The difference is that the execution timing of S2706 can be after S2705.

[0659] S2707: The second communication device sends information #5, i.e., second information. Correspondingly, the first communication device receives information #5.

[0660] For the implementation of S2707, please refer to the relevant introduction of S2504.

[0661] S2708: The first communication device sends information #6, ie, the sixth information, and the second communication device receives information #6.

[0662] Information #6 is used to indicate receiving the third reference signal on multiple receiving beams.

[0663] S2709: The first communication device transmits a third reference signal on the third transmit beam. Correspondingly, the second communication device receives the third reference signal on each receive beam in the first receive beam set and determines a third receive beam.

[0664] For the implementation of the third transmit beam, the third reference signal, the first receive beam set and the third receive beam, please refer to the relevant introduction in S2609. For the implementation of S2709, please refer to the relevant introduction in S2609. The difference is that the execution timing of S2709 can be after S2708.

[0665] For the implementation of S2709, please refer to the introduction of S2609.

[0666] In a possible implementation, the method provided in FIG. 27 may further include S2710.

[0667] S2710: The first communication device transmits data on the second transmit beam, and the second communication device receives data on the third receive beam.

[0668] In scenario 4.3, the first communication device is a terminal, and the polarization direction of the first communication device includes three polarization directions. The second communication device is a network device, and the polarization direction of the second communication device includes three polarization directions. For example, the first communication device and the second communication device are shown in (c) of Figure 8. In this case, the process of the beam management method is shown in Figure 28. The beam management method provided in Figure 28 includes:

[0669] S2801: The first communication device sends information #1, ie, the eleventh information, and the second communication device receives information #1.

[0670] S2802: The second communication device sends information #2, ie, the twelfth information, and the first communication device receives information #2.

[0671] S2803: The second communication device sends information #3, i.e., third information. Correspondingly, the first communication device receives information #3.

[0672] S2804: The first communication device transmits a first reference signal on each transmit beam in the first transmit beam set. Correspondingly, the second communication device receives the first reference signal on the first receive beam and determines the first transmit beam.

[0673] S2805: The second communication device sends information #4, namely, the first information. Correspondingly, the first communication device receives information #4.

[0674] S2806: The first communication device transmits a second reference signal on each transmit beam in the second transmit beam set. Correspondingly, the second communication device receives the second reference signal on the second receive beam and determines a second transmit beam.

[0675] S2807: The second communication device sends information #5, i.e., second information. Correspondingly, the first communication device receives information #5.

[0676] For the names of S2801 to S2807, please refer to the relevant introduction of S2601 to S2607. For the implementation of S2801 to S2807, please refer to the relevant introduction of S2601 to S2607 respectively, which will not be repeated here.

[0677] S2808: The first communication device receives information #6, i.e., the seventh information. Correspondingly, the second communication device sends information #6.

[0678] S2809: The first communication device transmits a fourth reference signal on a fourth transmit beam. Correspondingly, the second communication device receives the fourth reference signal on a second receive beam set and determines a fourth receive beam.

[0679] S2810: The second communication device sends information #7, ie, the ninth information. Correspondingly, the first communication device receives information #7.

[0680] S2811: The first communication device transmits a fifth reference signal on a fifth transmit beam. Correspondingly, the second communication device receives the fifth reference signal on a third receive beam set and determines a fifth receive beam.

[0681] In a possible implementation, the method provided in FIG. 28 may further include S2812.

[0682] S2812: The first communication device transmits data on the second transmit beam. Correspondingly, the second communication device receives data on the fifth receive beam.

[0683] For the names of S2808 to S2812, please refer to the relevant introduction of S2301 to S2307. For the implementation of S2808 to S2812, please refer to the relevant introduction of S2301 to S2307 respectively, which will not be repeated here.

[0684] For the beneficial effects of the method provided in FIG. 28 , please refer to the relevant introduction of the method provided in FIG. 25 .

[0685] In scenario 4.4, the first communication device is a network device, and the polarization direction of the first communication device includes three polarization directions. The second communication device is a terminal, and the polarization direction of the second communication device includes three polarization directions. For example, the first communication device and the second communication device are shown in (c) of Figure 8. In this case, the process of the beam management method is shown in Figure 29. The beam management method provided in Figure 29 includes:

[0686] S2901: The second communication device sends information #1, ie, the thirteenth information, and the first communication device receives information #1.

[0687] S2902: The first communication device sends information #2, i.e., the fourteenth information. The second communication device receives information #2.

[0688] S2903: The first communication device sends information #3, ie, fourth information, and the second communication device receives information #3.

[0689] S2904: The first communication device transmits a first reference signal on each transmit beam in the first transmit beam set. Correspondingly, the second device receives the first reference signal on the first receive beam and determines the first transmit beam.

[0690] S2905: The second communication device sends information #4, namely, the first information. Correspondingly, the first communication device receives information #4.

[0691] S2906: The first communication device transmits a second reference signal on each transmit beam in the second transmit beam set. Correspondingly, the second communication device receives the second reference signal on the second receive beam and determines a second transmit beam.

[0692] S2907: The second communication device sends information #5, i.e., second information. Correspondingly, the first communication device receives information #5.

[0693] For the names in S2901 to S2907, please refer to the relevant introduction in S2701 to S2707. For the implementation of S2901 to S2907, please refer to the relevant introduction in S2701 to S2707 respectively, which will not be repeated here.

[0694] S2908: The first communication device sends information #6, ie, the eighth information, and the second communication device receives information #6.

[0695] S2909: The first communication device transmits a fourth reference signal on a fourth transmit beam. Correspondingly, the second communication device receives the fourth reference signal on a second receive beam set and determines a fourth receive beam.

[0696] S2910: The first communication device sends information #7, i.e., the tenth information. Correspondingly, the second communication device receives information #7.

[0697] S2911: The first communication device transmits a fifth reference signal on a fifth transmit beam. Correspondingly, the second communication device receives the fifth reference signal on a third receive beam set and determines a fifth receive beam.

[0698] In a possible implementation, the method provided in FIG. 29 may further include S2912.

[0699] S2912: The first communication device transmits data on the second transmit beam. Correspondingly, the second communication device receives data on the fifth receive beam.

[0700] Regarding the names in S2908 to S2912, please refer to the relevant introduction in S2401 to S2407. The implementation of S2908 to S2912 can refer to the relevant introduction in S2401 to S2407 in sequence, and will not be repeated here.

[0701] For the beneficial effects of the method provided in FIG. 29 , please refer to the relevant introduction of the method provided in FIG. 25 .

[0702] The method provided by the embodiment of the present application is described in detail above in conjunction with Figures 10 to 29. The communication device for executing the method provided by the embodiment of the present application is described in detail below in conjunction with Figures 30 to 31.

[0703] For example, Figure 30 is a structural diagram of a communication device according to an embodiment of the present application. As shown in Figure 30, the communication device 3000 includes a processing module 3001 and a transceiver module 3002. For ease of illustration, Figure 30 only shows the main components of the communication device.

[0704] Among them, the processing module 3001 can be used to execute the steps other than sending and receiving in the above-mentioned Figures 10 to 29, and the sending and receiving module 3002 can be used to execute the steps related to receiving or sending in the above-mentioned Figures 10 to 29.

[0705] The transceiver module 3002 may include a receiving module and a sending module (not shown in FIG30 ). The transceiver module 3002 is used to implement the sending function and the receiving function of the communication device.

[0706] Optionally, the communication device may further include a storage module (not shown in FIG30 ) storing a program or instruction. When the processing module 3001 executes the program or instruction, the communication device may perform the functions of the first communication device or the second communication device in any of the methods shown in FIG30 .

[0707] It should be understood that the processing module 3001 involved in the communication device can be implemented by a processor or processor-related circuit components, which can be a processor or a processing unit; the transceiver module 3002 can be implemented by a transceiver or transceiver-related circuit components, which can be a transceiver or a transceiver unit.

[0708] It should be noted that the communication device can be a terminal or a network device, or a chip (system) or other parts or components that can be set in the terminal or network device, or a device that includes a terminal or network device. This application does not limit this.

[0709] In addition, the technical effects of the communication device can refer to the technical effects of the method shown in any one of Figures 10 to 29, and will not be repeated here.

[0710] For example, Figure 31 is a second structural diagram of a communication device provided in an embodiment of the present application. The communication device may be a terminal or a network device, or a chip (system) or other component or assembly that can be provided in a terminal or a network device.

[0711] As shown in Figure 31, the communication device 3100 may include a processor 3101. Optionally, the communication device 3100 may further include a memory 3102 and / or a transceiver 3103. The processor 3101 is coupled to the memory 3102 and the transceiver 3103, for example, via a communication bus.

[0712] The following is a detailed introduction to the various components of the communication device 3100 with reference to FIG31:

[0713] The processor 3101 is the control center of the communication device 3100 and can be a single processor or a collective term for multiple processing elements. For example, the processor 3101 can be one or more central processing units (CPUs), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application, such as one or more digital signal processors (DSPs) or one or more field programmable gate arrays (FPGAs).

[0714] Optionally, the processor 3101 can perform various functions of the communication device 3100 by running or executing software programs stored in the memory 3102 and calling data stored in the memory 3102.

[0715] In a specific implementation, as an embodiment, the processor 3101 may include one or more CPUs, such as CPU0 and CPU1 shown in Figure 31.

[0716] In a specific implementation, as an embodiment, the communication device 3100 may also include multiple processors, such as the processor 3101 and the processor 3104 shown in FIG31 . Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0717] Among them, the memory 3102 is used to store the software program for executing the solution of this application, and the execution is controlled by the processor 3101. The specific implementation method can refer to the above method embodiment and will not be repeated here.

[0718] Alternatively, the memory 3102 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including a compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 3102 may be integrated with the processor 3101 or exist independently and be coupled to the processor 3101 via an interface circuit (not shown in FIG. 31 ) of the communication device 3100, which is not specifically limited in this embodiment of the present application.

[0719] Transceiver 3103 is used for communication with other communication devices. For example, if communication device 3100 is a terminal, transceiver 3103 can be used to communicate with a network device or another terminal. For another example, if communication device 3100 is a network device, transceiver 3103 can be used to communicate with a terminal or another network device.

[0720] Optionally, the transceiver 3103 may include a receiver and a transmitter (not shown separately in FIG31 ), wherein the receiver is used to implement a receiving function, and the transmitter is used to implement a transmitting function.

[0721] Optionally, the transceiver 3103 can be integrated with the processor 3101, or can exist independently and be coupled to the processor 3101 through the interface circuit of the communication device 3100 (not shown in Figure 31). This embodiment of the present application does not specifically limit this.

[0722] It should be noted that the structure of the communication device 3100 shown in Figure 31 does not constitute a limitation on the communication device. The actual communication device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0723] In addition, the technical effects of the communication device 3100 can refer to the technical effects of the method described in the above method embodiment, and will not be repeated here.

[0724] It should be understood that the processor in the embodiments of the present application may be a CPU, but may also be other general-purpose processors, DSPs, ASICs, FPGAs, or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0725] It should also be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a ROM, a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an EEPROM, or a flash memory. The volatile memory can be a RAM, which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0726] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (such as 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 contains one or more available media sets. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state drive.

[0727] It should be understood that the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. A and B can be singular or plural. Furthermore, the character " / " as used herein generally indicates an "or" relationship between the associated objects, but it may also indicate an "and / or" relationship. For specific understanding, please refer to the context.

[0728] In this application, "at least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural.

[0729] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0730] 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. Professional and technical personnel 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 application.

[0731] 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.

[0732] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0733] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0734] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0735] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0736] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application 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 application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A beam management method, characterized in that: Applied to a first communication device, wherein the polarization direction of the first communication device includes three polarization directions; the method includes: Determining a first receiving beam based on a first polarization direction; the first receiving beam corresponds to the first polarization direction and a first pointing angle, the first polarization direction being any one of the three polarization directions of the first communication device; A first reference signal is received on each receiving beam in a first receiving beam set, and a second receiving beam is determined; the first receiving beam set includes: receiving beams corresponding to the three polarization directions of the first communication device at the first pointing angle, and the first reference signal is sent by the second communication device on the first transmitting beam; the second receiving beam is used for the first communication device to receive data, and the second receiving beam is the receiving beam in the first receiving beam set with the largest signal strength for receiving the first reference signal, wherein the pointing angle of the second receiving beam is the first pointing angle, and the polarization direction of the second receiving beam is a second polarization direction, and the second polarization direction is one of the three polarization directions.

2. The method according to claim 1, characterized in that The determining the first receive beam based on the first polarization direction includes: A second reference signal is received on each receive beam in a second receive beam set, and the first receive beam is determined; the second receive beam set includes: receive beams corresponding to multiple pointing angles in the first polarization direction, the second reference signal is sent by the second communication device on a second transmit beam, and the first receive beam is a receive beam in the second receive beam set.

3. The method according to claim 2, characterized in that The method further comprises: Receive first information; wherein the first information is used to indicate receiving the second reference signal on a receiving beam corresponding to each of the multiple pointing angles in the same polarization direction; The receiving a second reference signal on each receive beam in the second receive beam set and determining the first receive beam includes: The second reference signal is received on each receive beam in the second receive beam set according to the first information, and the first receive beam is determined.

4. The method according to claim 2, characterized in that Before receiving the second reference signal on each receive beam in the second receive beam set and determining the first receive beam, the method further includes: Send second information; wherein, the second information is used to indicate that the second reference signal is sent on a transmit beam.

5. The method according to claim 1 or 2, characterized in that The method further comprises: A third reference signal is received on a third receive beam, and a third transmit beam is determined; the third reference signal is transmitted by the second communication device on each transmit beam in the first transmit beam set, and the third transmit beam is a transmit beam in the first transmit beam set.

6. The method according to claim 5, characterized in that The method further comprises: receiving third information; wherein the third information is used to indicate that the third reference signal is received on a receiving beam; The receiving a third reference signal on a third receive beam and determining a third transmit beam includes: The third reference signal is received on the third receive beam according to the third information, and the third transmit beam is determined.

7. The method according to claim 5, characterized in that Before receiving the third reference signal on the third receive beam and determining the third transmit beam, the method further includes: Fourth information is sent, where the fourth information is used to indicate that the third reference signal is sent on a transmission beam corresponding to each of the multiple pointing angles.

8. The method according to claim 1 or 2, characterized in that The method further comprises: A fourth reference signal is received on a fourth receive beam, and a fourth transmit beam is determined; wherein the fourth reference signal is transmitted by the second communication device on each transmit beam in a second transmit beam set, and the second transmit beam set includes: transmit beams corresponding to multiple pointing angles in the same polarization direction of the second communication device, and the fourth transmit beam corresponds to the second pointing angle.

9. The method according to claim 8, characterized in that The method further comprises: receiving fifth information; wherein the fifth information is used to indicate that the fourth reference signal is received on a receive beam; The receiving a fourth reference signal on a fourth receive beam and determining a fourth transmit beam includes: The fourth reference signal is received on the fourth receive beam according to the fifth information, and the fourth transmit beam is determined.

10. The method according to claim 8, characterized in that Before receiving the fourth reference signal on the fourth receive beam and determining the fourth transmit beam, the method further includes: Send sixth information; the sixth information is used to indicate that the fourth reference signal is sent on the transmission beams corresponding to multiple pointing angles in the same polarization direction.

11. The method according to claim 8, characterized in that The method further comprises: A fifth reference signal is received on a fifth receive beam, and a fifth transmit beam is determined; wherein the fifth reference signal is transmitted by the second communication device on each transmit beam in a third transmit beam set, and the third transmit beam set includes: transmit beams corresponding to each of the three polarization directions of the second communication device at the second pointing angle, and the fifth transmit beam is one of the transmit beams in the third transmit beam set.

12. The method according to claim 11, characterized in that The method further comprises: receiving seventh information; wherein the seventh information is used to indicate that the fifth reference signal is received on a receive beam; The receiving a fifth reference signal on a fifth receive beam and determining a fifth transmit beam includes: The fifth reference signal is received on the fifth receive beam according to the seventh information to obtain the fifth transmit beam.

13. The method according to claim 11, characterized in that Before receiving the fifth reference signal on the fifth receive beam and determining the fifth transmit beam, the method further includes: Send eighth information; wherein, the eighth information is used to indicate that a reference signal is sent on a transmission beam corresponding to each of the three polarization directions at the same pointing angle.

14. The method according to claim 1, 2, 3, 5, 6, 8, 9, 11 or 12, wherein: The method further comprises: Sending ninth information; wherein the ninth information is used to indicate the number of receiving antennas on the first communication device and the number of polarization directions of the receiving antennas on the first communication device; Receive tenth information; wherein, the tenth information is determined by the second communication device based on the ninth information, and the tenth information is used to indicate the number of pointing angles and polarization directions of the receiving beam for beam management by the first communication device.

15. The method according to claim 14, characterized in that The ninth information is also used to instruct beam configuration.

16. The method of claim 1, 2, 4, 5, 7, 8, 10, 11, or 13, wherein: The method further comprises: Receive eleventh information; wherein the eleventh information is used to indicate the number of transmitting antennas on the second communication device and the number of polarization directions of the transmitting antennas on the second communication device; Send twelfth information; the twelfth information is determined based on the eleventh information, and the twelfth information is used to indicate the number of pointing angles and polarization directions of the transmitting beam for beam management by the second communication device.

17. The method according to claim 16, characterized in that The eleventh information is also used to indicate beam configuration.

18. A beam management method, characterized in that: Applied to a first communication device, wherein the polarization direction of the first communication device includes three polarization directions; the method includes: Transmitting a first reference signal on each transmit beam in a first transmit beam set; wherein the first transmit beam set includes: transmit beams corresponding to each of a plurality of pointing angles in a first polarization direction, the first polarization direction being one of three polarization directions of the first communication device; receiving first information, wherein the first information is used to indicate a first transmit beam, where the first transmit beam is determined by the second communication device based on the first reference signal, the first transmit beam is one transmit beam in the first transmit beam set, and the angle of the first transmit beam is a first pointing angle; Sending a second reference signal on each transmit beam in a second transmit beam set; the second transmit beam set includes: transmit beams corresponding to each of the three polarization directions of the first communication device at the first pointing angle; Receive second information; the second information is used to indicate a second transmit beam, the second transmit beam is determined by the second communication device based on the first reference signal and the second reference signal, the second transmit beam is the transmit beam with the largest received signal strength of the second reference signal sent in the second transmit beam set, and the second transmit beam is used for the first communication device to send signals.

19. The method according to claim 18, characterized in that The method further comprises: Receive third information; wherein the third information is used to instruct to send the first reference signal on the same polarization direction and the transmission beam corresponding to each of the multiple pointing angles; The transmitting the first reference signal on each transmit beam in the first transmit beam set includes: The first reference signal is transmitted on each transmit beam in the first transmit beam set according to the third information.

20. The method according to claim 18, wherein Before transmitting the first reference signal on each transmit beam in the first transmit beam set, the method further includes: Send fourth information; wherein the fourth information is used to indicate that the first reference signal is received on a receiving beam.

21. The method according to claim 18, wherein The method further comprises: A third reference signal is transmitted on a third transmission beam, wherein the third reference signal is used to determine a reception beam for receiving data by the second communication device.

22. The method according to claim 21, characterized in that The method further comprises: receiving fifth information; wherein the fifth information is used to indicate that the third reference signal is sent on a transmit beam; The sending of the third reference signal on the third transmit beam includes: The third reference signal is transmitted on the third transmit beam according to the fifth information.

23. The method according to claim 21, characterized in that Before sending the third reference signal on the third transmit beam, the method further includes: Send sixth information; wherein the sixth information is used to indicate that the third reference signal is received on multiple receiving beams.

24. The method according to claim 18, wherein The method further comprises: A fourth reference signal is transmitted on a fourth transmit beam, wherein the fourth reference signal is used to determine a pointing angle of a receive beam used by the second communication device to receive data.

25. The method according to claim 24, characterized in that The method further comprises: receiving seventh information; wherein the seventh information is used to indicate that the fourth reference signal is sent on a transmit beam; The sending of the fourth reference signal on the fourth transmit beam includes: The fourth reference signal is transmitted on the fourth transmit beam according to the seventh information.

26. The method according to claim 24, characterized in that Before sending the fourth reference signal on the fourth transmit beam, the method further includes: Send eighth information; wherein, the eighth information is used to indicate that the fourth reference signal is received on a receiving beam corresponding to each of multiple pointing angles in the same polarization direction.

27. The method according to claim 24, characterized in that The method further comprises: A fifth reference signal is transmitted on a fifth transmit beam, wherein the fifth reference signal is used to determine a polarization direction of a receive beam for receiving data of the second communication device.

28. The method according to claim 27, characterized in that The method further comprises: receiving ninth information, wherein the ninth information is used to indicate that the fifth reference signal is transmitted on a transmit beam; The sending of the fifth reference signal on the fifth transmit beam includes: The fifth reference signal is transmitted on the fifth transmit beam according to the ninth information.

29. The method according to claim 27, characterized in that Before sending the fifth reference signal on the fifth transmit beam, the method further includes: Send tenth information; the tenth information is used to indicate that the fifth reference signal is received on the receiving beams corresponding to the three polarization directions of the second communication device at the same pointing angle.

30. The method of claim 18, 19, 21, 22, 24, 25, 27, or 28, wherein: The method further comprises: Sending eleventh information; wherein the eleventh information is used to indicate the number of transmitting antennas on the first communication device and the number of polarization directions of the transmitting antennas on the first communication device; Receive twelfth information; wherein the twelfth information is determined based on the eleventh information, and the twelfth information is used to indicate the number of pointing angles and polarization directions of the transmitting beam for beam management by the first communication device.

31. The method according to claim 30, wherein The eleventh information is also used to indicate beam configuration.

32. The method of claim 18, 20, 21, 23, 24, 26, 27 or 29, wherein: The method further comprises: receiving thirteenth information; wherein the thirteenth information is used to indicate the number of receiving antennas on the second communication device and the number of polarization directions of the receiving antennas on the second communication device; Send fourteenth information; wherein, the fourteenth information is determined based on the thirteenth information, and the fourteenth information is used to indicate the number of pointing angles and polarization directions of the transmitting beam for beam management by the first communication device.

33. The method according to claim 32, characterized in that The thirteenth information is also used to instruct beam configuration.

34. The method according to any one of claims 1 to 33, wherein The first communication device includes a centralized unit CU and / or a distributed unit DU, or the first communication device includes an open centralized unit O-CU and / or an open distributed unit O-DU.

35. A communication device, characterized in that: The communication device is configured to execute the beam management method according to any one of claims 1 to 34.

36. A communication device, characterized in that include: processor and memory; The memory is used to store computer instructions, and when the processor executes the instructions, the communication device performs the beam management method according to any one of claims 1 to 34.

37. A communication device, characterized in that: include: processor and interface circuit; wherein, The interface circuit is used to receive code instructions and transmit them to the processor; The processor is configured to run the code instructions to perform the beam management method according to any one of claims 1 to 34.

38. A communication device, characterized in that: The communication device includes a processor and a transceiver, the transceiver is used to exchange information between the communication device and other communication devices, and the processor executes program instructions to perform the beam management method according to any one of claims 1 to 34.

39. The communication device according to any one of claims 35 to 38, characterized in that The communication device is a chip.

40. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a computer program or instructions. When the computer program or instructions are executed on a computer, the computer is caused to perform the beam management method according to any one of claims 1 to 34.

41. A computer program product, characterized in that The computer program product comprises: a computer program or instructions, and when the computer program or instructions are run on a computer, the computer is caused to perform the beam management method according to any one of claims 1 to 34.

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