Communication method and apparatus

Abstract

The present application relates to the field of wireless communications. Provided are a communication method and apparatus. The method comprises: receiving a first signal on a first time-domain resource in a first time unit; receiving a second signal on a second time-domain resource in the first time unit; and determining a third spatial-domain parameter on the basis of the first signal and the second signal, wherein the first time unit comprises the second time-domain resource and a third time-domain resource, the third time-domain resource being used for bearing a cyclic prefix, and the first time-domain resource being part of the third time-domain resource or the whole third time-domain resource, and the first signal corresponds to a first spatial-domain parameter, and the second signal corresponds to a second spatial-domain parameter, the first spatial-domain parameter and the second spatial-domain parameter being difference. In the above process, a cyclic prefix is used for determining a third spatial-domain parameter, and therefore the number of reference signals carried in time-domain resources which are used for data transmission can be reduced, thereby improving the spectral efficiency of data transmission, and thus increasing the capacity of a communication system.

Description

Communication method and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on December 27, 2023, with application number 202311840187.1 and application name “Communication Method and Device,” the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of wireless communications, and in particular to communication methods and devices. Background Art

[0003] In wireless communication systems, reference signals can be used for beam tracking. For example, a network device sends multiple reference signals to a terminal, and the beams of the multiple reference signals point in different directions. After the terminal determines the reference signal with the strongest received power, it indicates the beam corresponding to the reference signal to the network device, and the network device can subsequently use the beam to continue sending signals. However, for communication scenarios where the terminal moves at high speed, the terminal updates the beam more frequently, and the network device needs to configure a high-density reference signal in the time domain for the terminal for beam tracking. However, this increases the overhead of the reference signal used for beam tracking (for ease of description, the "reference signal for beam tracking" will be referred to as the "reference signal" below), which will result in low spectrum efficiency for data transmission and low capacity of the communication system. Summary of the Invention

[0004] The present application provides a communication method and apparatus that can improve the spectrum efficiency of data transmission, thereby increasing the capacity of the communication system.

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

[0006] In a first aspect, a communication method is provided. The method can be performed by a signal receiving end. The signal receiving end here can refer to the signal receiving end itself, or to a processor, module, logical node, chip, or chip system within the signal receiving end that implements the method. For example, the signal receiving end can be a terminal or a radio access network (RAN) node.

[0007] The method includes: receiving a first signal on a first time domain resource within a first time unit, and determining a third spatial domain parameter based on the first signal. The first time unit includes a third time domain resource, and the third time domain resource is used to carry a cyclic prefix; the first time domain resource is part of or all of the third time domain resource; and the first signal corresponds to the first spatial domain parameter. The third time domain resource being used to carry the cyclic prefix can be replaced by a signal corresponding to the third time domain resource being the cyclic prefix.

[0008] Based on the method provided in the first aspect above, a signal receiving end can determine the third spatial domain parameter based on the first signal of the first time domain resource that carries part or all of the cyclic prefix. This method expands the use of the cyclic prefix, thereby reducing the transmission of reference signals used to determine spatial domain parameters (e.g., reference signals used for beam tracking), improving the spectral efficiency of data transmission, and thereby increasing the capacity of the communication system.

[0009] In one possible implementation, the method further includes: receiving a second signal on a second time domain resource within the first time unit, and determining a third spatial domain parameter based on the first signal, including: determining the third spatial domain parameter based on the first signal and the second signal. The first time unit also includes the second time domain resource, the second signal corresponds to the second spatial domain parameter, and the first spatial domain parameter is different from the second spatial domain parameter.

[0010] Based on the above possible implementation methods, the signal receiving end can determine the third spatial domain parameter based on the first signal and the second signal. For example, the third spatial domain parameter is determined based on the first spatial domain parameter corresponding to the first signal and the second spatial domain parameter corresponding to the second signal. This can reduce the transmission of reference signals used to determine the third spatial domain parameter (for example, reference signals used for beam tracking), and can use more spectrum resources to transmit data, thereby improving the spectrum efficiency of data transmission and thereby improving the capacity of the communication system.

[0011] In a possible implementation manner, the third time domain resources include the first time domain resources and the fourth time domain resources.

[0012] Based on the above possible implementation methods, the first time domain resource is a partial time domain resource of the third time domain resource, that is, the signal receiving end can determine the third spatial domain parameter based on the first signal corresponding to the first time domain resource corresponding to the partial cyclic prefix, and the remaining part of the cyclic prefix can still be used to eliminate inter-symbol interference.

[0013] In a possible implementation manner, in the time domain, the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0014] Based on the above possible implementation methods, when the signal receiving end receives the signal of the first time unit, the fourth time domain resource can realize the function of the cyclic prefix to eliminate the inter-symbol interference caused by the multipath effect, and the first time domain resource can replace part of the reference signal for beam tracking transmitted in the second time domain resource, which can improve the data transmission efficiency and the spectrum resource utilization of the transmitted data.

[0015] In one possible implementation, the third time domain resource includes the first time domain resource, the fourth time domain resource and the fifth time domain resource. In the time domain, the fifth time domain resource is located before the first time domain resource and is continuous with the first time domain resource, and the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0016] Based on the above possible implementation, the fifth time domain resource is located before the first time domain resource, the fourth time domain resource and the second time domain resource, so as to eliminate the interference caused by the previous time unit of the first time unit when the multipath effect exists.

[0017] In a possible implementation, the fourth time domain resource corresponds to the second spatial domain parameter. This may also be understood as the signal on the fourth time domain resource corresponding to the second spatial domain parameter.

[0018] Based on the above possible implementation methods, the fourth time domain resource and the second time domain resource both correspond to the second spatial domain parameter, so that when the multipath effect exists, the signal receiving end uses the fourth time domain resource to eliminate the interference between the second time domain resource and the time domain resources before the fourth time domain resource during the process of receiving the signal on the fourth time domain resource and the second time domain resource.

[0019] In one possible implementation, the method further includes: receiving a third signal on a sixth time domain resource within a second time unit; receiving a fourth signal on a seventh time domain resource within the second time unit; wherein the second time unit includes the seventh time domain resource and the eighth time domain resource, and the eighth time domain resource is used to carry a cyclic prefix; the sixth time domain resource is part of or all of the eighth time domain resource; the third signal corresponds to a first spatial domain parameter, and the fourth signal corresponds to a second spatial domain parameter; determining the third spatial domain parameter based on the first signal and the second signal includes: determining the third spatial domain parameter based on the first signal, the second signal, the third signal, and the fourth signal. The eighth time domain resource being used to carry the cyclic prefix can be replaced by the signal corresponding to the eighth time domain resource being the cyclic prefix.

[0020] Based on the above possible implementation methods, the signal receiving end can accumulate the receiving power of the first signal and the third signal, and accumulate the receiving power of the second signal and the fourth signal, so as to improve the signal-to-noise ratio of the received signal and further improve the accuracy of beam tracking.

[0021] In one possible implementation, the first spatial parameter, the second spatial parameter, and the third spatial parameter are spatial reception parameters of the first device, and the first device is a device that receives the first signal and the second signal, that is, the first device is a signal receiving end.

[0022] Based on the above possible implementation methods, the signal receiving end can determine the third spatial domain reception parameter based on the spatial domain reception parameter corresponding to the first signal (such as the first spatial domain parameter) and the spatial domain reception parameter corresponding to the second signal, so that the signal receiving end receives the signal according to the third spatial domain reception parameter.

[0023] In a possible implementation, the method further includes: sending first capability information, where the first capability information indicates whether the first device supports transmitting the first signal and the second signal respectively through different spatial parameters.

[0024] Based on the above possible implementation methods, the signal receiving end can indicate to the device receiving the first capability information (such as the signal sending end) whether it supports transmitting the first signal and the second signal respectively through different spatial domain parameters, so that the signal sending end can determine whether to use the method of the first aspect to communicate with the signal receiving end.

[0025] In one possible implementation, the first spatial parameter, the second spatial parameter, and the third spatial parameter are spatial transmission parameters of the second device, and the second device is a device that sends the first signal and the second signal, that is, the second device is a signal sending end.

[0026] Based on the above possible implementation methods, the signal receiving end can determine the third spatial domain sending parameters based on the spatial domain sending parameters corresponding to the first signal and the spatial domain sending parameters corresponding to the second signal, so that the signal sending end sends the signal according to the third spatial domain sending parameters.

[0027] In a possible implementation, the method further includes: sending first indication information; the first indication information is used to indicate a third airspace parameter.

[0028] Based on the above possible implementation manner, a device that receives the first indication information, such as a signal transmitting end, can communicate with a signal receiving end according to the third spatial domain parameter.

[0029] In a possible implementation, the third spatial domain parameter is a center angle of a target beam, and the target beam is used to transmit data.

[0030] Based on the above possible implementation manner, the signal receiving end can determine the center angle of the beam used to transmit data, so as to facilitate communication between the receiving end and the transmitting end of the data.

[0031] In a possible implementation, the method further includes: receiving second indication information, where the second indication information is used to indicate that the first airspace parameter and the second airspace parameter are different.

[0032] Based on the above possible implementations, the signal receiving end can determine that the first spatial parameter and the second spatial parameter are different, and thus receive the first signal and the second signal in a corresponding manner. For example, if the first spatial parameter and the second spatial parameter are both spatial transmission parameters, the signal receiving end can receive the first signal and the second signal through different beams.

[0033] In a second aspect, a communication method is provided. The method can be performed by a signal transmitting end. The signal transmitting end here can refer to the signal transmitting end itself, or to a processor, module, logical node, chip, or chip system within the signal transmitting end that implements the method. For example, the signal transmitting end can be a RAN node or a terminal.

[0034] The method includes: sending a first signal on a first time domain resource within a first time unit. The first time unit includes a second time domain resource and a third time domain resource, the third time domain resource is used to carry a cyclic prefix; the first time domain resource is part of or all of the third time domain resource; the first signal corresponds to a first spatial domain parameter, and the first signal is used to determine the third spatial domain parameter. The third time domain resource being used to carry the cyclic prefix can be replaced by a signal corresponding to the third time domain resource being the cyclic prefix.

[0035] Based on the method provided in the second aspect above, the signal transmitting end can transmit the first signal on part or all of the time domain resources carrying the cyclic prefix, so that the device receiving the first signal (such as the signal receiving device) determines the third spatial domain parameter based on the first signal. This method expands the use of the cyclic prefix, thereby reducing the transmission of reference signals used to determine the spatial domain parameters (for example, reference signals used for beam tracking), improving the spectrum efficiency of data transmission, and thereby increasing the capacity of the communication system.

[0036] In one possible implementation, the method further includes: sending a second signal on a second time domain resource within the first time unit, wherein the second signal corresponds to a second spatial domain parameter, the first spatial domain parameter and the second spatial domain parameter are different, and the second signal is used to determine a third spatial domain parameter.

[0037] Based on the above possible implementation methods, the signal transmitting end can also send a second signal on the second time domain resource, so that the device that receives the first signal and the second signal (such as the signal receiving end) can determine the third spatial domain parameter based on the first signal and the second signal. For example, the third spatial domain parameter is determined based on the first spatial domain parameter corresponding to the first signal and the second spatial domain parameter corresponding to the second signal. This can reduce the transmission of reference signals used to determine the third spatial domain parameters (for example, reference signals used for beam tracking), and can use more spectrum resources to transmit data, thereby improving the spectrum efficiency of data transmission and thereby improving the capacity of the communication system.

[0038] In a possible implementation manner, the third time domain resources include the first time domain resources and the fourth time domain resources.

[0039] Based on the above possible implementation methods, the first time domain resource is a partial time domain resource of the third time domain resource, which enables the signal receiving end to determine the third spatial domain parameter based on the first signal corresponding to the first time domain resource carrying part of the cyclic prefix, and the remaining part of the cyclic prefix can still be used to eliminate inter-symbol interference.

[0040] In a possible implementation manner, in the time domain, the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0041] Based on the above possible implementation methods, when the signal sending end sends the signal of the first time unit, since the first signal can replace part of the reference signal for beam tracking transmitted in the second time domain resources, the data transmission efficiency and the spectrum resource utilization of the transmitted data can be improved.

[0042] In one possible implementation, the third time domain resource includes the first time domain resource, the fourth time domain resource and the fifth time domain resource. In the time domain, the fifth time domain resource is located before the first time domain resource and is continuous with the first time domain resource, and the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0043] Based on the above possible implementation, the fifth time domain resource is located before the first time domain resource, the fourth time domain resource and the second time domain resource, so as to eliminate the interference caused by the previous time unit of the first time unit when the multipath effect exists.

[0044] In a possible implementation manner, the fourth time domain resource corresponds to the second spatial domain parameter.

[0045] Based on the above possible implementation methods, the fourth time domain resource and the second time domain resource both correspond to the second spatial domain parameter, so that when the multipath effect exists, when the signal sending end sends the fourth time domain resource and the second time domain resource according to the second spatial domain parameter, the fourth time domain resource can eliminate the interference between the second time domain resource and the time domain resource before the fourth time domain resource.

[0046] In one possible implementation, the method further includes: sending a third signal on a sixth time domain resource within a second time unit; sending a fourth signal on a seventh time domain resource within the second time unit; wherein the second time unit includes the seventh time domain resource and the eighth time domain resource, and the eighth time domain resource is used to carry a cyclic prefix; the sixth time domain resource is part of or all of the eighth time domain resource; the third signal corresponds to a fourth spatial domain parameter, the fourth signal corresponds to a fifth spatial domain parameter, the fourth spatial domain parameter and the fifth spatial domain parameter are different, and the third signal and the fourth signal are used to determine the third spatial domain parameter. The eighth time domain resource being used to carry the cyclic prefix can be replaced by the signal corresponding to the eighth time domain resource being the cyclic prefix.

[0047] Based on the above possible implementation methods, the signal sending end sends the signal corresponding to the second time unit according to the above method, so that the device receiving the third signal and the fourth signal (such as the signal receiving end) can accumulate the receiving power of the first signal and the third signal, and accumulate the receiving power of the second signal and the fourth signal, thereby improving the signal-to-noise ratio of the received signal and further improving the accuracy of beam tracking.

[0048] In one possible implementation, the first spatial parameter, the second spatial parameter, and the third spatial parameter are spatial reception parameters of the first device, and the first device is a device that receives the first signal and the second signal, that is, the first device is a signal receiving end.

[0049] Based on the above possible implementation methods, the signal receiving end can receive the signal sent by the signal transmitting end according to the third spatial domain parameter, and beam tracking can be achieved more accurately.

[0050] In a possible implementation, the method further includes: receiving first capability information, where the first capability information indicates whether the first device supports transmitting the first signal and the second signal respectively through different spatial parameters.

[0051] Based on the above possible implementation methods, the signal sending end can determine whether it can send the first signal and the second signal to the device receiving the first signal and the second signal (such as the signal receiving end) through different spatial parameters according to the first capability information.

[0052] In one possible implementation, the first spatial parameter, the second spatial parameter, and the third spatial parameter are spatial transmission parameters of the second device, and the second device is a device that sends the first signal and the second signal, that is, the second device is a signal sending end.

[0053] Based on the above possible implementation methods, the signal receiving end can determine the third spatial domain sending parameters.

[0054] In a possible implementation, the method further includes: receiving first indication information; the first indication information is used to indicate a third spatial domain parameter.

[0055] Based on the above possible implementation manner, the signal transmitting end may obtain the third spatial domain parameter according to the first indication information, and thereby communicate with the signal receiving end using the third spatial domain parameter.

[0056] In a possible implementation, the third spatial domain parameter is a center angle of a target beam, and the target beam is used to transmit data.

[0057] Based on the above possible implementation manner, the signal receiving end can determine the center angle of the beam used to transmit data, thereby facilitating communication between the receiving end and the transmitting end of the data.

[0058] In a possible implementation, the method further includes: sending second indication information, where the second indication information is used to indicate that the first airspace parameter and the second airspace parameter are different.

[0059] Based on the above possible implementations, the signal transmitting end may indicate to a device receiving the second indication information (e.g., a signal receiving end) through the second indication information that the first spatial domain parameter and the second spatial domain parameter are different, so that the signal receiving end receives the first signal and the second signal in a corresponding manner. For example, if the first spatial domain parameter and the second spatial domain parameter are both spatial domain transmission parameters, the signal receiving end may receive the first signal and the second signal through different beams.

[0060] In a third aspect, a communication method is provided, which can be executed by a terminal. The terminal here can refer to the terminal itself or a processor, module, logical node, chip, or chip system in the terminal that implements the method.

[0061] The method includes: determining first capability information and sending the first capability information. The first capability information indicates whether transmission of a first signal and a second signal using different spatial domain parameters is supported. The time domain resources of the first signal are first time domain resources within a first time unit, the time domain resources of the second signal are second time domain resources within the first time unit, the first time unit includes the second time domain resources and a third time domain resource, the first time domain resource is included in the third time domain resource, and the third time domain resource is used to carry a cyclic prefix.

[0062] Based on the method provided in the third aspect above, the terminal can use the first capability information to enable the device receiving the first capability information (such as a RAN node) to know whether the terminal supports transmitting the first signal and the second signal respectively through different spatial parameters. If so, the device receiving the first capability information can configure fewer reference signals in the second signal to reduce the overhead of the reference signal, improve the spectrum efficiency of data transmission, and thereby improve the capacity of the communication system.

[0063] In a possible implementation, the above-mentioned spatial domain parameter is a spatial domain receiving parameter or a spatial domain sending parameter.

[0064] Based on the above possible implementation methods, when the above spatial domain parameters are spatial domain reception parameters or spatial domain transmission parameters, the terminal indicates to the receiving device (such as a RAN node) that receives the first capability information whether it supports the first signal and the second signal to be transmitted using different spatial domain reception parameters.

[0065] In one possible implementation, the first capability information indicates support for transmitting the first signal and the second signal respectively through different spatial domain parameters, and the above method also includes: transmitting the first signal on the first time domain resource; transmitting the second signal on the second time domain resource; wherein the first signal corresponds to the first spatial domain parameter, the second signal corresponds to the second spatial domain parameter, the first spatial domain parameter and the second spatial domain parameter are different, and the first signal and the second signal are used to determine the third spatial domain parameter.

[0066] Based on the above possible implementation methods, the terminal can indicate to a receiving device (such as a RAN node) that receives the first capability information through the first capability information that the terminal supports transmitting the first signal and the second signal respectively through different spatial domain parameters, and determine the third spatial domain parameter based on the first signal and the second signal. For example, the terminal determines the third spatial domain parameter based on the first spatial domain parameter corresponding to the first signal and the second spatial domain parameter corresponding to the second signal, thereby reducing the transmission of reference signals used to determine the third spatial domain parameter (for example, reference signals used for beam tracking), and can use more spectrum resources to transmit data, thereby improving the spectrum efficiency of data transmission, and thereby improving the capacity of the communication system.

[0067] In a possible implementation manner, the third time domain resources include the first time domain resources and the fourth time domain resources.

[0068] Based on the above possible implementation methods, the first time domain resource is a partial time domain resource of the third time domain resource, that is, the terminal can determine the third spatial domain parameter based on the first signal corresponding to the first time domain resource carrying part of the cyclic prefix, and the remaining part of the cyclic prefix can still be used to eliminate inter-symbol interference.

[0069] In a possible implementation manner, in the time domain, the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0070] Based on the above possible implementation methods, when the terminal receives the signal of the first time unit, the fourth time domain resource can realize the function of the cyclic prefix to eliminate the inter-symbol interference caused by the multipath effect. The first time domain resource can replace part of the reference signal for beam tracking transmitted in the second time domain resource, which can improve the data transmission efficiency and the spectrum resource utilization of the transmitted data.

[0071] In one possible implementation, the third time domain resource includes the first time domain resource, the fourth time domain resource and the fifth time domain resource. In the time domain, the fifth time domain resource is located before the first time domain resource and is continuous with the first time domain resource, and the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0072] Based on the above possible implementation, the fifth time domain resource is located before the first time domain resource, the fourth time domain resource and the second time domain resource, so as to eliminate the interference caused by the previous time unit of the first time unit when the multipath effect exists.

[0073] In a possible implementation manner, the fourth time domain resource corresponds to the second spatial domain parameter.

[0074] Based on the above possible implementation methods, the fourth time domain resources and the second time domain resources both correspond to the second spatial domain parameters, so that when the multipath effect exists, the terminal uses the fourth time domain resources to eliminate the interference between the second time domain resources and the time domain resources before the fourth time domain resources during the process of receiving signals on the fourth time domain resources and the second time domain resources.

[0075] In one possible implementation, the above method also includes: transmitting a third signal on a sixth time domain resource within the second time unit; transmitting a fourth signal on a seventh time domain resource within the second time unit; wherein the second time unit includes the seventh time domain resource and the eighth time domain resource, and the eighth time domain resource is used to carry a cyclic prefix; the sixth time domain resource is part of or all of the eighth time domain resource; the third signal corresponds to the first spatial domain parameter, the fourth signal corresponds to the second spatial domain parameter, and the third signal and the fourth signal are used to determine the third spatial domain parameter.

[0076] Based on the above possible implementation methods, the terminal can accumulate the receiving power of the first signal and the third signal, and accumulate the receiving power of the second signal and the fourth signal, so as to improve the signal-to-noise ratio of the received signal and further improve the accuracy of beam tracking.

[0077] In one possible implementation, the first spatial parameter, the second spatial parameter, and the third spatial parameter are spatial reception parameters of the first device, and the first device is a device that receives the first signal and the second signal, that is, the first device is a signal receiving end.

[0078] Based on the above possible implementation methods, the terminal can determine the third spatial domain reception parameters based on the spatial domain reception parameters corresponding to the first signal (such as the first spatial domain parameters) and the spatial domain reception parameters corresponding to the second signal, so as to receive the signal according to the third spatial domain reception parameters.

[0079] In a possible implementation, the first spatial domain parameter, the second spatial domain parameter, and the third spatial domain parameter are spatial domain transmission parameters of the second device, and the second device is a device that sends the first signal and the second signal.

[0080] Based on the above possible implementation methods, the terminal can determine the third spatial domain sending parameters according to the spatial domain sending parameters corresponding to the first signal and the spatial domain sending parameters corresponding to the second signal, so as to send the signal according to the third spatial domain sending parameters.

[0081] In a possible implementation, the method further includes: sending first indication information; the first indication information is used to indicate a third airspace parameter.

[0082] Based on the possible implementation manner described above, a device that receives the first indication information, such as a RAN node, may communicate with the RAN node according to the third spatial domain parameter.

[0083] In a possible implementation, the third spatial domain parameter is a center angle of a target beam, and the target beam is used to transmit data.

[0084] Based on the above possible implementation manner, the center angle of the beam used to transmit data can be determined to facilitate communication between the receiving end and the transmitting end of the data.

[0085] In a possible implementation, the method further includes: receiving second indication information, where the second indication information is used to indicate that the first airspace parameter and the second airspace parameter are different.

[0086] Based on the above possible implementations, the terminal can determine that the first spatial parameter and the second spatial parameter are different, and thus receive the first signal and the second signal in a corresponding manner. For example, if the first spatial parameter and the second spatial parameter are both spatial transmission parameters, the signal receiving end can receive the first signal and the second signal through different beams.

[0087] In a fourth aspect, a communication method is provided, which can be performed by a RAN node. The RAN node here can refer to the RAN node itself, or a processor, module, logical node, chip, or chip system in the RAN node that implements the method.

[0088] The method includes: receiving first capability information, and communicating with a terminal based on the first capability information. The first capability information indicates whether the terminal supports transmitting a first signal and a second signal respectively using different spatial domain parameters, the time domain resource of the first signal is a first time domain resource within a first time unit, the time domain resource of the second signal is a second time domain resource within the first time unit, the first time unit includes the second time domain resource and a third time domain resource, the first time domain resource is included in the third time domain resource, and the third time domain resource is used to carry a cyclic prefix.

[0089] Based on the method provided in the fourth aspect above, the RAN node can obtain, based on the first capability information, whether the device (such as a terminal) sending the first capability information supports transmitting the first signal and the second signal respectively through different spatial parameters. If so, the RAN node can configure fewer reference signals in the second signal to reduce the overhead of the reference signal, improve the spectrum efficiency of data transmission, and thereby improve the capacity of the communication system.

[0090] In a possible implementation, the above-mentioned spatial domain parameter is a spatial domain receiving parameter or a spatial domain sending parameter.

[0091] Based on the above possible implementation methods, when the above spatial domain parameters are spatial domain reception parameters or spatial domain transmission parameters, the RAN node can obtain, based on the first capability information, whether the device (such as a terminal) sending the first capability information supports the transmission of the first signal and the second signal using different spatial domain reception parameters.

[0092] In one possible implementation, the first capability information indicates that the terminal supports transmitting the first signal and the second signal respectively through different spatial domain parameters, and communicating with the terminal based on the first capability information, the above method also includes: transmitting the first signal on the first time domain resource; transmitting the second signal on the second time domain resource; wherein the first signal corresponds to the first spatial domain parameter, the second signal corresponds to the second spatial domain parameter, the first spatial domain parameter and the second spatial domain parameter are different, and the first spatial domain parameter and the second spatial domain parameter are used to determine the third spatial domain parameter.

[0093] Based on the above possible implementation methods, the RAN node can obtain, based on the first capability information, whether the terminal supports the transmission of the first signal and the second signal respectively through different spatial domain parameters, and determine the third spatial domain parameter based on the first signal and the second signal. If so, the transmission of the reference signal used to determine the third spatial domain parameter (for example, the reference signal used for beam tracking) can be reduced, and more spectrum resources can be used to transmit data, thereby improving the spectrum efficiency of data transmission and thereby improving the capacity of the communication system.

[0094] In a possible implementation manner, the third time domain resources include the first time domain resources and the fourth time domain resources.

[0095] Based on the above possible implementation method, the first time domain resource is a partial time domain resource of the third time domain resource, which allows the RAN node to determine the third spatial domain parameter based on the first signal corresponding to the first time domain resource carrying part of the cyclic prefix. The remaining part of the cyclic prefix can still be used to eliminate inter-symbol interference.

[0096] In a possible implementation manner, in the time domain, the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0097] Based on the above possible implementation methods, when the RAN node transmits the signal of the first time unit, the fourth time domain resource can realize the function of the cyclic prefix to eliminate the inter-symbol interference caused by the multipath effect. The first time domain resource can replace part of the reference signal for beam tracking transmitted in the second time domain resource, which can improve data transmission efficiency and spectrum resource utilization for transmitting data.

[0098] In one possible implementation, the third time domain resource includes the first time domain resource, the fourth time domain resource and the fifth time domain resource. In the time domain, the fifth time domain resource is located before the first time domain resource and is continuous with the first time domain resource, and the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0099] Based on the above possible implementation, the fifth time domain resource is located before the first time domain resource, the fourth time domain resource and the second time domain resource, so as to eliminate the interference caused by the previous time unit of the first time unit when the multipath effect exists.

[0100] In a possible implementation manner, the fourth time domain resource corresponds to the second spatial domain parameter.

[0101] Based on the above possible implementation methods, the fourth time domain resource and the second time domain resource both correspond to the second spatial domain parameters, so that when the multipath effect exists, when the RAN node sends the fourth time domain resource and the second time domain resource according to the second spatial domain parameters, the fourth time domain resource is used to eliminate interference between the second time domain resource and the time domain resources before the fourth time domain resource.

[0102] In one possible implementation, the above method also includes: transmitting a third signal on a sixth time domain resource within the second time unit; transmitting a fourth signal on a seventh time domain resource within the second time unit; wherein the second time unit includes the seventh time domain resource and the eighth time domain resource, and the eighth time domain resource is used to carry a cyclic prefix; the sixth time domain resource is part of the time domain resource or all of the time domain resource of the eighth time domain resource; the third signal corresponds to a fourth spatial domain parameter, the fourth signal corresponds to a fifth spatial domain parameter, the fourth spatial domain parameter and the fifth spatial domain parameter are different, and the third signal and the fourth signal are used to determine the third spatial domain parameter.

[0103] Based on the above possible implementation methods, the RAN node transmits the signal corresponding to the second time unit according to the above method, so that the device (such as the terminal) receiving the third signal and the fourth signal can accumulate the received power of the first signal and the third signal, and accumulate the received power of the second signal and the fourth signal, thereby improving the signal-to-noise ratio of the received signal and further improving the accuracy of beam tracking.

[0104] In a possible implementation, the first spatial parameter, the second spatial parameter, and the third spatial parameter are spatial reception parameters of a first device, and the first device is a device that receives the first signal and the second signal.

[0105] Based on the above possible implementation manner, the terminal can receive the signal sent by the RAN node according to the third spatial domain parameter, and beam tracking can be achieved more accurately.

[0106] In a possible implementation, the first spatial parameter, the second spatial parameter, and the third spatial parameter are spatial transmission parameters of a second device, and the second device is a device that sends the first signal and the second signal, that is, the second device is a RAN node.

[0107] Based on the above possible implementation manner, the RAN node may determine the third spatial domain sending parameter.

[0108] In a possible implementation, the method further includes: receiving first indication information; the first indication information is used to indicate a third spatial domain parameter.

[0109] Based on the above possible implementation manner, the RAN node may obtain the third spatial domain parameter according to the first indication information, and thereby communicate with the terminal using the third spatial domain parameter.

[0110] In a possible implementation, the third spatial domain parameter is a center angle of a target beam, and the target beam is used to transmit data.

[0111] Based on the above possible implementation manner, the terminal can determine the center angle of the beam used to transmit data, thereby facilitating communication between the receiving end and the transmitting end of the data.

[0112] In a possible implementation, the method further includes: sending second indication information, where the second indication information is used to indicate that the first airspace parameter and the second airspace parameter are different.

[0113] Based on the above possible implementation, the RAN node may indicate to a device (e.g., a terminal) receiving the second indication information, through the second indication information, that the first spatial domain parameter and the second spatial domain parameter are different, so that the terminal receives the first signal and the second signal in a corresponding manner. For example, if the first spatial domain parameter and the second spatial domain parameter are both spatial domain transmission parameters, the terminal may receive the first signal and the second signal through different beams.

[0114] In a fifth aspect, a communication device is provided for implementing the above-mentioned method. The communication device may be the signal receiving end in the above-mentioned first aspect; or the communication device may be the signal transmitting end in the above-mentioned second aspect; or the communication device may be the terminal in the above-mentioned third aspect; or the communication device may be the RAN node in the above-mentioned fourth aspect. The communication device includes modules, units, or means corresponding to implementing the above-mentioned method. The modules, units, or means may be implemented in hardware, software, or by executing corresponding software implementations in hardware. The hardware or software includes one or more modules or units corresponding to the above-mentioned functions.

[0115] In conjunction with the fifth aspect, in one possible implementation, the communication device may include a processing module and an interface module. The processing module may be configured to implement the processing functionality described in any of the above aspects and any possible implementations thereof. The processing module may, for example, be a processor. The interface module, also referred to as an interface unit, may be configured to implement the sending and / or receiving functionality described in any of the above aspects and any possible implementations thereof. The interface module may be comprised of an interface circuit, a transceiver, a transceiver, or a communication interface.

[0116] In combination with the fifth aspect above, in a possible implementation, the interface module includes a sending module and a receiving module, which are respectively used to implement the sending and receiving functions in any of the above aspects and any possible implementations thereof.

[0117] In a sixth aspect, a communication device is provided, comprising: a processor; the processor is configured to be coupled to a memory and, after reading instructions from the memory, execute the method according to any of the above-mentioned aspects in accordance with the instructions. The communication device may be the signal receiving end in the first aspect; or the signal transmitting end in the second aspect; or the terminal in the third aspect; or the RAN node in the fourth aspect.

[0118] In conjunction with the sixth aspect, in one possible implementation, the communication device further includes a memory for storing program instructions and data. Optionally, the memory is integrated with the processor; or the memory is independent of the processor.

[0119] In conjunction with the sixth aspect above, in one possible implementation, the communication device is a chip or a chip system. Optionally, when the communication device is a chip system, it can be composed of a chip or include a chip and other discrete devices.

[0120] In a seventh aspect, a communication device is provided, comprising: a processor and an interface circuit; the interface circuit being configured to receive a computer program or instruction and transmit it to the processor; and the processor being configured to execute the computer program or instruction, thereby causing the communication device to perform the method described in any of the above aspects. The communication device may be the signal receiving end described in the first aspect; or the signal transmitting end described in the second aspect; or the terminal described in the third aspect; or the RAN node described in the fourth aspect.

[0121] In conjunction with the seventh aspect above, in one possible implementation, the communication device is a chip or a chip system. Optionally, when the communication device is a chip system, it can be composed of a chip or include a chip and other discrete devices.

[0122] In an eighth aspect, a computer-readable storage medium is provided, wherein instructions are stored in the computer-readable storage medium, which, when executed on a computer, enables the computer to execute any of the above methods.

[0123] In a ninth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute any of the methods described above.

[0124] In a tenth aspect, a communication system is provided, which includes a signal receiving end for executing the method of the first aspect and a signal sending end for executing the method of the second aspect.

[0125] In an eleventh aspect, a communication system is provided, which includes a terminal for executing the method of the third aspect and a RAN node for executing the method of the fourth aspect.

[0126] Among them, the technical effects brought about by any possible implementation method in the fifth to eleventh aspects can be referred to the technical effects brought about by any aspect in the first to fourth aspects or different possible implementation methods in any aspect, and will not be repeated here.

[0127] It is understandable that, provided that the solutions are not contradictory, the solutions in each aspect can be combined. BRIEF DESCRIPTION OF THE DRAWINGS

[0128] FIG1 is a schematic diagram of the communication system architecture provided by this application;

[0129] FIG2 is a schematic diagram of the hardware structure of the communication device provided by this application;

[0130] FIG3 is a flow chart of the communication method provided by the present application;

[0131] FIG4 is a second flow chart of the communication method provided by this application;

[0132] FIG5A is a first schematic diagram of time domain distribution of the first signal and the second signal provided by the present application;

[0133] FIG5B is a second schematic diagram of time domain distribution of the first signal and the second signal provided by the present application;

[0134] FIG5C is a third schematic diagram of time domain distribution of the first signal and the second signal provided by the present application;

[0135] FIG5D is a schematic diagram of a beam provided in this application;

[0136] FIG6 is a third flow chart of the communication method provided by this application;

[0137] FIG7 is a schematic diagram of the structure of the communication device provided in this application. DETAILED DESCRIPTION

[0138] In order to reduce the overhead of the reference signal and improve the spectrum efficiency of data transmission, the present application provides a communication method that can be applied to a signal transmitting end and a signal receiving end. In this method, the signal transmitting end can send a first signal to the signal receiving end on a first time domain resource within a first time unit. After the signal receiving end receives the first signal on the first time domain resource within the first time unit, it can determine the third spatial domain parameter based on the first signal. The first time unit includes a third time domain resource, and the third time domain resource is used to carry a cyclic prefix (CP); the first time domain resource is part of the time domain resource or all of the time domain resource of the third time domain resource; and the first signal corresponds to the first spatial domain parameter.

[0139] In the above process, the signal receiving end can determine the third spatial domain parameter based on part or all of the CP (i.e., the first signal) sent by the signal transmitting end. In other words, this method can expand the use of the CP and use the CP to determine the third spatial domain parameter. This can reduce the transmission of reference signals used to determine the spatial domain parameters (e.g., reference signals used for beam tracking), improve the spectrum efficiency of data transmission, and thus improve the capacity of the communication system. For example, when part or all of the CP is not used to determine the third spatial domain parameter, it is necessary to transmit the reference signal for beam tracking in multiple time units within a period of time (e.g., within a period of 20 time units, the reference signal for beam tracking is configured in the 5th, 10th, 15th, and 20th time units, with a corresponding time domain overhead of 20%). However, when part or all of the CP is used to determine the third spatial domain parameter, it is no longer necessary to configure the reference signal for beam tracking, and beam tracking can be performed using the CP of some time units. By expanding the use of the CP, the time domain overhead of the reference signal for beam tracking is reduced, thereby improving the communication capacity.

[0140] It can be understood that CP usually refers to the prefix of the symbol, such as the cyclic extension signal generated by moving the signal at the tail of the symbol to the head, which can form a protection interval between symbols to eliminate inter-symbol interference (ISI). For example, for the wireless transmission channel between the base station and the terminal, due to changes in the environment, terrain and clutter, there is a multipath effect, and CP can be used to reduce the impact of the multipath effect on wireless communication. Therefore, for scenarios with small ISI, CP can be used for other purposes. For example, in urban air mobility (UAM) scenarios, line-of-sight communication is usually dominant, and there is less air scattering and weak multipath effects, so the role of CP is weakened, and CP can be considered for other purposes. Therefore, the present application provides the above method, which uses CP for beam tracking to improve the spectrum efficiency of data transmission in scenarios with small ISI.

[0141] Optionally, the signal transmitting end may further transmit a second signal to the signal receiving end on a second time domain resource within the first time unit. Accordingly, the signal receiving end may receive the second signal on the second time domain resource. The second signal corresponds to a second spatial domain parameter, and the first spatial domain parameter is different from the second spatial domain parameter. The second spatial domain parameter may be used to determine a third spatial domain parameter. In other words, the signal receiving end may determine the third spatial domain parameter based on the first signal and the second signal.

[0142] In the above process, the signal receiving end can determine the third spatial domain parameter based on signals with different spatial domain parameters received on different time domain resources within the first time unit. The first time domain resource is a time domain resource used to transmit the CP, that is, the CP can participate in determining the third spatial domain parameter. This can reduce the transmission of reference signals used to determine the spatial domain parameters (for example, reference signals used for beam tracking), improve the spectrum efficiency of data transmission, and thereby improve the capacity of the communication system.

[0143] It is understandable that the "reference signal for beam tracking" here may not carry user payload and can be used to transmit framing, training, or detection signals. The "reference signal for beam tracking" is, for example, a demodulation reference signal (DMRS) or a channel status information reference signal (CSI-RS). Among them, the demodulation reference signal can be used for downlink data demodulation. The channel state information reference signal can be used for channel measurement, beam management, and time-frequency synchronization.

[0144] It can be understood that the method provided in the present application can be used in various communication systems. For example, the communication system can be a universal mobile telecommunications system (UMTS) system, a long term evolution (LTE) system, a fifth generation (5G) communication system, a wireless fidelity (WiFi) system, a communication system related to the third generation partnership project (3GPP), a future evolution communication system (such as: a sixth generation (6G) communication system, etc.), or a system that integrates multiple systems, etc., without limitation. Among them, 5G can also be called new radio (NR). The method provided in the present application is described below using the communication system 10 shown in Figure 1 as an example. Figure 1 is only a schematic diagram and does not constitute a limitation on the applicable scenarios of the technical solution provided in the present application.

[0145] As shown in Figure 1, a schematic diagram of the architecture of a communication system 10 provided by the present application is shown. In Figure 1, the communication system 10 may include one or more RAN nodes 101 (only one is shown) and terminals 102-104 that can communicate with the RAN node 101.

[0146] In Figure 1 , the RAN node can provide wireless access services for terminals. Specifically, each RAN node corresponds to a service coverage area. Terminals entering this area can communicate with the RAN node via the air interface to receive the wireless access services provided by the RAN node. Optionally, the service coverage area may include one or more cells. The terminal and the RAN node can communicate via an air interface link. The air interface link can be divided into an uplink (UL) and a downlink (DL) according to the direction of the data transmitted thereon. Uplink data sent from the terminal to the RAN node can be transmitted on the UL, and downlink data transmitted from the RAN node to the terminal can be transmitted on the DL. For example: in Figure 1 , terminal 103 is located in the coverage area of ​​RAN node 101. RAN node 101 can send downlink data to terminal 103 via DL, and terminal 103 can send uplink data to RAN node 101 via UL.

[0147] The RAN node in this application, for example, the RAN node 101 can be a device with wireless transceiver functions, which can help the terminal achieve wireless access, such as a node in the RAN, and can also be called an access network device or a network device. RAN nodes include, but are not limited to, evolved NodeBs (eNBs or e-NodeBs) in LTE, next-generation eNBs (ng-eNBs) in LTE, gNodeBs (gNBs) in NR, transmitting points (TPs) or transmission receiving points (TRPs), base stations developed in subsequent 3GPP evolutions, next-generation NodeBs (gNBs), next-generation base stations in sixth-generation (6G) mobile communication systems, base stations in future mobile communication systems, satellites, access nodes in Wi-Fi systems, wireless relay nodes, wireless backhaul nodes, integrated access and backhaul (IAB) nodes, mobile switching centers, and network equipment in non-terrestrial network (NTN) communication systems, i.e., network equipment that can be deployed on high-altitude platforms or satellites. Base stations can be macro base stations, micro base stations, pico base stations, small cells, relay stations, or balloon base stations. Multiple base stations can support networks with the same technology mentioned above, or they can support networks with different technologies mentioned above. A base station can include one or more co-sited or non-co-sited TRPs. A RAN node can also be a device that acts as a base station in D2D communication, Internet of Vehicles communication, drone communication, and machine communication. A RAN node can also be a wireless controller in a cloud radio access network (CRAN) scenario. A RAN node can also be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), a radio unit (RU), a roadside unit (RSU) with base station function, a wired access gateway, or a core network element. A RAN node can also be a server, a wearable device, a machine communication device, or an on-board device. For example, the access network device in V2X technology can be an RSU. The following explanation takes the RAN node as a base station as an example.The multiple RAN nodes can be base stations of the same type or different types. A base station can communicate with a terminal or communicate with the terminal through a relay station. A terminal can communicate with multiple base stations of different technologies. For example, a terminal can communicate with a base station supporting an LTE network or a base station supporting a 5G network, and can also support dual connectivity with base stations of an LTE network and a base station of a 5G network.

[0148] In this application, the CU and DU may be separately configured or may be included in the same network element, such as a baseband unit (BBU). The RU may be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH). It is understood that the CU may be classified as a network device in an access network, or as a network device in a core network, without limitation herein.

[0149] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in an open radio access network (ORAN) system, CU may also be called O-CU (open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, this application takes CU, CU-CP, CU-UP, DU and RU as examples for description. Any unit of 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.

[0150] The terminal in this application, for example, terminal 102, terminal 103 or terminal 104, is a device with wireless transceiver capabilities. The terminal can be deployed on land, including indoors, outdoors, handheld or vehicle-mounted; it can also be deployed on the water (such as a ship, etc.); it can also be deployed in the air (such as an airplane, a balloon, and a satellite, etc.). The terminal can also be called a terminal device, and the terminal device can be a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc., or a device used to provide voice or data connectivity to a user. Among them, UE includes a handheld device with wireless communication capabilities, a vehicle-mounted device (such as a car, bicycle, electric vehicle, airplane, ship, train, high-speed rail, etc.), a wearable device (such as a smart watch, a smart bracelet, a pedometer, etc.) or a computing device. Exemplarily, the UE can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a satellite terminal or a computer with wireless transceiver capabilities. A UE may also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless modem, a smart point of sale (POS) machine, customer-premises equipment (CPE), an intelligent robot, a robotic arm, workshop equipment, smart home devices (e.g., refrigerators, televisions, air conditioners, electric meters, etc.), a wireless terminal in industrial control, a wireless terminal in unmanned 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, an in-vehicle terminal, a roadside unit (RSU) with terminal functions, or an aerial device (e.g., an intelligent robot, a hot air balloon, a drone, an airplane), etc. A terminal may also be other devices with terminal functions, for example, a terminal may also be a device that functions as a terminal in device-to-device (D2D) communication.

[0151] As an example and not a limitation, in this application, the terminal may be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. For example, a wearable device is not only a hardware device, but also a device that achieves powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include devices that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as devices that focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0152] In the present application, the terminal may be a terminal in an Internet of Things (IoT) system. IoT is an important component of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-to-object interconnection. The terminal in the present application may be a terminal in machine type communication (MTC). The terminal of the present application may be an on-board module, on-board module, on-board component, on-board chip or on-board unit built into a vehicle as one or more components or units. The vehicle may implement the method of the present application through the built-in on-board module, on-board module, on-board component, on-board chip or on-board unit. The terminal of the present application may be a vehicle, such as a car. Therefore, the present application may be applied to Internet of Vehicles, such as vehicle to everything (V2X), long term evolution vehicle (LTE-V), vehicle to vehicle (V2V), etc.

[0153] It is understandable that in some scenarios, the roles of RAN nodes and terminals are relative. For example, a helicopter or drone, which is usually configured as a terminal, can also be configured as a mobile base station, and the device that accesses the RAN via the helicopter or drone is configured as a terminal.

[0154] In this application, the form of a RAN node is not limited. The device used to implement the functions of a RAN node can be a RAN node; it can also be a device that supports the RAN node to implement the functions, such as a chip system. The device can be installed in a RAN node or used in conjunction with a RAN node.

[0155] The communication system 10 shown in Figure 1 is for illustrative purposes only and is not intended to limit the technical solutions of this application. Those skilled in the art will appreciate that, in a specific implementation, the communication system 10 may further include other devices, and the number of RAN nodes and terminals may be determined based on specific needs and is not limited.

[0156] Optionally, each network element or device (such as a RAN node or terminal, etc.) in Figure 1 of the present application can also be referred to as a communication device, which can be a general device or a dedicated device. This application does not make specific limitations on this.

[0157] Optionally, the relevant functions of each network element or device (such as a RAN node or terminal, etc.) in Figure 1 of this application can be implemented by a single device, or can be implemented by multiple devices together, or can be implemented by one or more functional modules within a single device. This application does not impose specific limitations on this. It is understood that the above functions can be network elements in hardware devices, software functions running on dedicated hardware, or a combination of hardware and software, or virtualized functions instantiated on a platform (such as a cloud platform).

[0158] In specific implementations, each network element or device (e.g., a RAN node or terminal) in FIG. 1 of the present application may adopt the structure shown in FIG. 2 or include the components shown in FIG. FIG. 2 illustrates a schematic diagram of the hardware structure of a communication device applicable to the present application. The communication device 20 includes at least one processor 201 and at least one communication interface 204 for implementing the method provided herein. The communication device 20 may also include a communication circuit 202 and a memory 203.

[0159] The processor 201 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application.

[0160] The communication link 202 may include a path for transmitting information between the above components, such as a bus.

[0161] Communication interface 204 is used to communicate with other devices or communication networks. Communication interface 204 can be any transceiver-like device, such as an Ethernet interface, a radio access network (RAN) interface, a wireless local area network (WLAN) interface, a transceiver, a pin, a bus, an interface circuit, or a transceiver circuit.

[0162] The memory 203 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices 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, optical disc storage (including compressed optical 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 to this. The memory can be independent and coupled to the processor 201 via the communication line 202. The memory 203 can also be integrated with the processor 201. The memory provided in this application can generally be non-volatile.

[0163] Among them, the memory 203 is used to store computer-executable instructions involved in executing the solution provided by this application, and is controlled by the processor 201. The processor 201 is used to execute the computer-executable instructions stored in the memory 203, thereby implementing the method provided by this application. Alternatively, optionally, in this application, the processor 201 can also perform the processing-related functions of the method provided below in this application, and the communication interface 204 is responsible for communicating with other devices or communication networks, which is not specifically limited in this application.

[0164] Optionally, the computer-executable instructions in this application may also be referred to as application code, which is not specifically limited in this application.

[0165] The coupling in this application is an indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.

[0166] As an embodiment, the processor 201 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 2 .

[0167] As an embodiment, the communication device 20 may include multiple processors, such as processor 201 and processor 207 in Figure 2. Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0168] As an embodiment, the communication device 20 may further include an output device 205 and / or an input device 206. The output device 205 is coupled to the processor 201 and can display information in a variety of ways. For example, the output device 205 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. The input device 206 is coupled to the processor 201 and can receive user input in a variety of ways. For example, the input device 206 can be a mouse, a keyboard, a touch screen device, or a sensor device.

[0169] It is understandable that the composition structure shown in Figure 2 does not constitute a limitation on the communication device. In addition to the components shown in Figure 2, the communication device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0170] The method provided by the present application will be described below with reference to the accompanying drawings. Each network element in the following embodiment may include the components shown in FIG2 , which will not be described in detail.

[0171] It can be understood that the message names between network elements or the names of parameters in the messages in the following embodiments of the present application are only examples, and other names may be used in specific implementations, and the present application does not make any specific limitations on this.

[0172] It is understood that in this application, "sending a first signal to ... (such as a terminal)" can be understood as the destination of the information being the terminal. This can include sending information to the terminal directly or indirectly. "Receiving a first signal from ... (such as a RAN node)" can be understood as the source of the information being the RAN node, which can include receiving information from the terminal directly or indirectly. The information may undergo necessary processing between the source and destination of the information, such as format changes, but the destination can understand the valid information from the source. Similar expressions in this application can be understood similarly and will not be repeated here.

[0173] It is understood that in this application, " / " can indicate that the objects associated with each other are in an "or" relationship, for example, A / B can mean A or B; "and / or" can be used to describe that there are three relationships between the associated objects, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In addition, expressions similar to "at least one of A, B and C" or "at least one of A, B or C" are usually used to indicate any of the following: A exists alone; B exists alone; C exists alone; A and B exist at the same time; A and C exist at the same time; B and C exist at the same time; A, B and C exist at the same time. The above uses A, B and C as an example to illustrate the optional items of the item. When there are more elements in the expression, the meaning of the expression can be obtained according to the above rules.

[0174] It is understood that in this application, "transmit" can be understood as sending and / or receiving depending on the specific context. "Transmit" can be a noun or a verb. When the execution subject of the action is not emphasized, "transmit" is often used instead of sending and / or receiving. For example, the phrase "transmitting a first signal" can be understood as "sending a first signal" from the perspective of the signal sending end, and can be understood as "receiving a first signal" from the perspective of the signal receiving end. Other similar descriptions can be referred to the explanations here and will not be pointed out one by one.

[0175] In order to facilitate the description of the technical solutions of the present application, in the present application, words such as "first" and "second" may be used to distinguish between technical features with the same or similar functions. The words such as "first" and "second" do not limit the quantity and execution order, and the words such as "first" and "second" do not necessarily limit them to be different. In the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or design. The use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way for easy understanding.

[0176] It is understood that the "embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the various embodiments in the entire specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It is understood that in the various embodiments of the present application, the size of the sequence number of each process 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 present application.

[0177] It can be understood that in the present application, "used to indicate" can include direct indications and indirect indications, and can also include explicit indications and implicit indications. When describing that a certain indication information is used to indicate A, it can include that the indication information directly indicates A or indirectly indicates A, and it does not mean that the indication information must carry A. The information indicated by a certain information (such as the first indication information described below) is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, directly indicating the information to be 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 also be achieved by means of the arrangement order of each information agreed in advance (such as specified in the protocol), thereby reducing the indication overhead to a certain extent.

[0178] It can be understood that in this application, "when...", "in the case of...", "if" and "if" all mean that corresponding processing will be taken under certain objective circumstances, and do not limit the time, nor do they require judgment actions when implementing them, nor do they mean that there are other limitations.

[0179] The term "simultaneously" in this application may be understood as at the same time point, within a period of time, or within the same cycle.

[0180] In this application, “multiple” can be understood as two or more than two. For example, “multiple beams” can be understood as two or more than two beams.

[0181] In this application, "greater than or equal to" can be replaced by "greater than" or "equal to"; "less than or equal to" can be replaced by "less than" or "equal to". For example, "A is greater than or equal to B" can be replaced by "A is greater than B" or "A is equal to B"; "A is less than or equal to B" can be replaced by "A is less than B" or "A is equal to B".

[0182] It is understood that some optional features in this application may, in certain scenarios, be implemented independently of other features, such as the solution on which they are currently based, to solve corresponding technical problems and achieve corresponding effects. They may also be combined with other features in certain scenarios as needed. Accordingly, the devices provided in this application may also implement these features or functions accordingly, which will not be described in detail here.

[0183] It is understandable that the same step or steps or technical features with the same function in different embodiments of the present application can be referenced to each other.

[0184] The following describes the method provided by this application using a RAN node as a signal transmitter and a terminal as a signal receiver as an example. It should be understood that when the terminal is the signal transmitter and the RAN node is the signal receiver, the interaction process between the RAN node and the terminal is similar to the interaction process between the RAN node and the terminal when the RAN node is the signal transmitter and the terminal is the signal receiver. Therefore, reference may be made to the method shown in FIG. 3 or FIG. 4 below, and no further description is given.

[0185] It is understood that in this application, the RAN node and / or terminal may perform some or all of the steps in this application. These steps are merely examples, and this application may also perform other steps or variations of various steps. In addition, the steps may be performed in a different order than presented in this application, and it is possible that not all steps in this application need to be performed.

[0186] It is understandable that the methods provided below in this application use RAN nodes and terminals as examples of the execution entities of the interaction diagram to illustrate the methods, but this application does not limit the execution entities of the interaction diagram. For example, the RAN node in the methods provided in the following embodiments of this application may also be a chip, chip system, or processor that supports the RAN node to implement the method, or a logical node, logical module, or software that can implement all or part of the RAN node functions; the terminal in the methods provided below in this application may also be a chip, chip system, or processor that supports the terminal to implement the method, or a logical node, logical module, or software that can implement all or part of the terminal functions.

[0187] As shown in FIG3 , a communication method provided by the present application may include the following steps:

[0188] S301: A RAN node sends a first signal to a terminal on a first time domain resource within a first time unit. Correspondingly, the terminal receives the first signal from the RAN node on the first time domain resource within the first time unit.

[0189] In the present application, the RAN node may be the RAN node 101 in the communication system 10 shown in FIG1 , and the terminal may be any terminal in the communication system 10 shown in FIG1 , such as the terminal 102 , the terminal 103 or the terminal 104 .

[0190] In this application, any time unit, such as the first time unit described above or the second time unit in the following embodiments, is a segment of resources in the time domain. For example, a time unit is a symbol, such as an orthogonal frequency division multiplexing (OFDM) symbol or an orthogonal time frequency space (OTFS) symbol.

[0191] In this application, the first time domain resource is the time domain resource within the first time unit. For example, the first time unit includes the third time domain resource. The first time domain resource is part of or all of the third time domain resource. The third time domain resource is used to carry the CP, or in other words, the third time domain resource is all of the time domain resources used to carry the CP within the first time unit.

[0192] In a possible design, the length of the time domain resource (such as the length of the first time domain resource, or the length of the second time domain resource described below) is related to the sampling interval of the sampling points of the OFDM symbol. Sampling the OFDM symbol facilitates the signal receiving end (such as the terminal) to extract waveform parameters from the received OFDM waveform. Specifically, for each received OFDM waveform, multiple sampling is performed in the time domain to obtain the level values ​​corresponding to the OFDM waveform at multiple sampling time points. The number of sampled level values ​​can ensure that the terminal can restore the OFDM waveform. Usually, the sampling interval T c and the frequency Δf max The relationship between can satisfy formula (1):

[0193] where Δf max Possible values ​​are: Δf max =480·10 3 , N f The possible values ​​are N f =4096, put the values ​​of these two parameters into formula (1) to calculate T c The possible value is about 5.09×10 -10 s, that is, the interval between two adjacent sampling points can be 5.09×10 -10 s, and then the length of the time domain resource can be determined based on the interval. It should be understood that in different scenarios or different communication systems, T c The calculation method and the value may be different, and this application does not limit them.

[0194] In one possible design, the RAN node sends the first signal using a first transmit beam on a first time domain resource, and the terminal receives the first signal using a first receive beam on the first time domain resource.

[0195] In the present application, the first signal may be a cyclic prefix.

[0196] S302: The terminal determines a third spatial domain parameter according to the first signal.

[0197] In the present application, the first signal corresponds to the first spatial domain parameter, and the first signal can be used to determine the third spatial domain parameter. In the present application, the first signal corresponds to the first spatial domain parameter, which can be understood as the spatial domain parameter of the first signal is the first spatial domain parameter, or the spatial domain parameter of the first signal includes the first spatial domain parameter, or the spatial domain parameter of the terminal receiving the first signal is the first spatial domain parameter (that is, the first spatial domain parameter is the spatial domain reception parameter of the terminal), or the spatial domain parameter of the RAN node sending the first signal is the first spatial domain parameter (that is, the first spatial domain parameter is the spatial domain sending parameter of the RAN node). It should be understood that the relevant understanding of the following signal corresponding to the spatial domain parameter and other similar descriptions is the same as here and will not be repeated hereafter.

[0198] In one possible design, the first spatial domain parameter and the third spatial domain parameter are spatial domain reception parameters of the terminal, or the first spatial domain parameter and the third spatial domain parameter are spatial domain sending parameters of the RAN node.

[0199] Exemplarily, the first spatial parameter is the angle of the first receive beam of the terminal, such as the center angle of the first receive beam, and the third spatial parameter is the angle of the third receive beam of the terminal, such as the center angle of the third receive beam. In other words, the terminal can determine the third receive beam based on the first signal, so that the terminal receives the signal based on the third receive beam.

[0200] Exemplarily, the first spatial parameter is the angle of a first transmit beam of the RAN node, such as the center angle of the first transmit beam, and the third spatial parameter is the angle of a third transmit beam of the RAN node, such as the center angle of the third transmit beam. In other words, the terminal can determine the third transmit beam based on the first signal and then notify the RAN node, so that the RAN node transmits a signal based on the third transmit beam.

[0201] Optionally, the RAN node may send the sixth signal to the terminal on a ninth time domain resource within a time unit (e.g., the third time unit) after or before the first time unit. Accordingly, the terminal receives the sixth signal from the RAN node on the ninth time domain resource. The ninth time domain resource is part or all of the time domain resources used to carry the CP within the third time unit. It will be appreciated that the implementation of the ninth time domain resource is similar to that of the first time domain resource and is not further described.

[0202] In one possible implementation, the terminal determines the third spatial space parameter based on the first signal, including: the terminal determines the third spatial space parameter based on the first signal and a sixth signal, where the first signal corresponds to the first spatial space parameter, the sixth signal corresponds to the sixth spatial space parameter, and the first spatial space parameter and the sixth spatial space parameter are different. The first spatial space parameter and the sixth spatial space parameter may be transmitting spatial space parameters of a RAN node, or the first spatial space parameter and the sixth spatial space parameter may be receiving spatial space parameters of the terminal.

[0203] Exemplarily, the first spatial domain parameter and the sixth spatial domain parameter are the transmitting spatial domain parameters of the RAN node. For example, the first spatial domain parameter and the sixth spatial domain parameter may be the index of the transmitting beam of the RAN node. The terminal may determine that the third spatial domain parameter is the first spatial domain parameter or the sixth spatial domain parameter (for example, the spatial domain parameter of the signal with greater signal receiving power is the third spatial domain parameter) based on the signal receiving power of the first signal and the signal receiving power of the sixth signal.

[0204] Exemplarily, the first spatial domain parameter and the sixth spatial domain parameter are transmit spatial domain parameters of the RAN node. For example, the first spatial domain parameter and the sixth spatial domain parameter may be the center angle of the transmit beam of the RAN node. The terminal may determine, based on the first signal and the sixth signal, that the third spatial domain parameter is the center angle of the transmit beam of the RAN node. The manner in which the terminal determines the third spatial domain parameter based on the first signal and the sixth signal is similar to the manner in which the terminal determines the third spatial domain parameter based on the first signal and the second signal. For details, reference may be made to the method for determining the third spatial domain parameter in S302a.

[0205] Exemplarily, the first spatial domain parameter and the sixth spatial domain parameter are the receiving spatial domain parameters of the terminal. For example, the first spatial domain parameter and the sixth spatial domain parameter can be the index of the receiving beam of the terminal. The terminal can determine that the third spatial domain parameter is the first spatial domain parameter or the sixth spatial domain parameter (for example, the spatial domain parameter of the signal with greater signal receiving power is the third spatial domain parameter) based on the signal receiving power of the first signal and the signal receiving power of the sixth signal.

[0206] Exemplarily, the first spatial domain parameter and the sixth spatial domain parameter are the receiving spatial domain parameters of the terminal. For example, the first spatial domain parameter and the sixth spatial domain parameter can be the center angle of the receiving beam of the terminal. The terminal can determine that the third spatial domain parameter is the center angle of the receiving beam of the terminal based on the first signal and the sixth signal. In this application, the angle of any beam (such as the angle of the first receiving beam) can be expressed by the angle of the horizontal direction of the beam and the angle of the vertical direction of the beam. Of course, the angle of the beam can also be expressed in other ways without limitation.

[0207] Based on the method shown in Figure 3, the RAN node can send a first signal using part or all of the time domain resources (e.g., the first time domain resources) used to carry the CP, so that the terminal can determine the third spatial domain parameter based on the first signal. In other words, this method can expand the use of the CP and use the CP to determine the third spatial domain parameter. In this way, the reference signals carried by the time domain resources used for data transmission can be reduced, the spectrum efficiency of data transmission can be improved, and the capacity of the communication system can be increased.

[0208] Optionally, in a possible implementation of the method shown in FIG3 , the RAN node may further send a second signal to the terminal on a second time domain resource within the first time unit, so that the terminal determines a third spatial domain parameter based on the first signal and the second signal. Specifically, as shown in FIG4 , the method shown in FIG3 may further include the following steps:

[0209] S301a: The RAN node sends a second signal to the terminal on a second time domain resource within the first time unit. Correspondingly, the terminal receives the second signal from the RAN node on the second time domain resource within the first time unit.

[0210] It can be understood that, in addition to the third time domain resources, the first time unit may also include the second time domain resources.

[0211] In the present application, the second signal may be a data signal and / or a reference signal. Exemplarily, when the second signal is a downlink data signal, it may be a data signal such as a physical downlink shared channel (PDSCH). Alternatively, when the second signal is a reference signal, it may be a reference signal such as a downlink demodulation reference signal. It should be understood that the second signal is not a CP, or the second time domain resource is not a time domain resource used to carry a CP.

[0212] In this application, the second signal corresponds to the second spatial domain parameter. For example, taking the example of a RAN node sending the second signal on a second time domain resource and a terminal receiving the second signal on the second time domain resource using a second receive beam, the second spatial domain parameter may be the angle of the second receive beam of the terminal, such as the center angle of the second receive beam.

[0213] For example, taking the example where the RAN node sends the second signal using the second transmit beam on the second time domain resource and the terminal receives the second signal on the second time domain resource, the second spatial domain parameter may be the angle of the second transmit beam of the RAN node, such as the center angle of the second transmit beam.

[0214] In the present application, the first spatial domain parameter is different from the second spatial domain parameter. The second spatial domain parameter may be a spatial domain reception parameter of the terminal, or the second spatial domain parameter may be a spatial domain transmission parameter of the RAN node. Exemplarily, taking the first spatial domain parameter and the second spatial domain parameter as the spatial domain reception parameters of the terminal as an example, such as the first spatial domain parameter is the angle of the first receiving beam of the terminal, the second spatial domain parameter is the angle of the second receiving beam of the terminal, and the angle of the first receiving beam is different from the angle of the second receiving beam. Exemplarily, taking the first spatial domain parameter and the second spatial domain parameter as the spatial domain transmission parameters of the RAN node as an example, such as the first spatial domain parameter is the angle of the first transmitting beam of the RAN node, the second spatial domain parameter is the angle of the second transmitting beam of the RAN node, and the angle of the first transmitting beam is different from the angle of the second transmitting beam.

[0215] In one possible design, the first time domain resource is all time domain resources of the third time domain resource. The first time domain resource is used to carry a cyclic prefix, which may be obtained from a signal at the end of the second time domain resource.

[0216] Figure 5A shows a schematic diagram of the time domain distribution of a first signal and a second signal. In Figure 5A, a RAN node can send the first signal to a terminal on time domain resource 501 (i.e., the first time domain resource) and send the second signal to the terminal on time domain resource 502 (i.e., the second time domain resource). The terminal receives the first signal on time domain resource 501 and the second signal on time domain resource 502. Time domain resource 501 and time domain resource 502 are continuous in the time domain, and time domain resource 502 follows time domain resource 501. The second signal includes 10 signal sampling points, and the RAN node can use the last 3 of these 10 signal sampling points as the first signal. In addition, time domain resource 501 can correspond to the first spatial domain parameter, and time domain resource 502 can correspond to the second spatial domain parameter.

[0217] In another possible design, the first time domain resource is part of the third time domain resource, and the third time domain resource includes the first time domain resource and the fourth time domain resource. In the time domain, the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0218] Optionally, the fourth time domain resource is also continuous with the second time domain resource.

[0219] Optionally, the signal transmitted by the fourth time domain resource (such as the eighth signal) may correspond to the second spatial domain parameter. For example, the eighth signal and the second signal use the same transmit beam, such as both are transmitted using the second transmit beam. It is understandable that when the eighth signal and the second signal are both transmitted using the second transmit beam, the inter-symbol interference caused by factors such as the multipath effect to the second signal can be eliminated. For another example, the signal transmitted by the fourth time domain resource (such as the eighth signal) and the second signal use the same receive beam, such as both are received using the second receive beam.

[0220] Optionally, the eighth signal may be CP.

[0221] Figure 5B shows another schematic diagram of the time domain distribution of the first signal and the second signal. In Figure 5B, the RAN node can send the first signal to the terminal on time domain resource 503 (i.e., the first time domain resource), send the eighth signal to the terminal on time domain resource 505 (i.e., the fourth time domain resource), and send the second signal to the terminal on time domain resource 504 (i.e., the second time domain resource). The terminal receives the first signal on time domain resource 503, the eighth signal on time domain resource 505, and the second signal on time domain resource 504. Time domain resource 503, time domain resource 505, and time domain resource 504 are continuous in the time domain, and time domain resource 505 follows time domain resource 503, and time domain resource 504 follows time domain resource 505. The second signal includes 10 signal sampling points, the first signal includes 2 signal sampling points, and the eighth signal includes 1 signal sampling point. The RAN node may use the last three signal sampling points in the second signal as a cyclic prefix. For example, the signals at the first two signal sampling points of the three signal sampling points may be used as the first signal, and the signal at the last signal sampling point of the three signal sampling points may be used as the eighth signal. In addition, time domain resource 503 may correspond to the first spatial domain parameter, and time domain resource 505 and time domain resource 504 may correspond to the second spatial domain parameter.

[0222] Another possible design is that the first time domain resource is a partial time domain resource of the third time domain resource, the third time domain resource includes the first time domain resource, the fourth time domain resource and the fifth time domain resource. In the time domain, the fifth time domain resource is located before the first time domain resource and is continuous with the first time domain resource, and the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0223] Optionally, the signal transmitted by the fourth time domain resource (such as the eighth signal) may correspond to the second spatial domain parameter. For example, the eighth signal and the second signal use the same transmit beam, such as both are transmitted using the second transmit beam. It is understandable that when the eighth signal and the second signal are both transmitted using the second transmit beam, the inter-symbol interference caused by factors such as the multipath effect to the second signal can be eliminated. For another example, the signal transmitted by the fourth time domain resource (such as the eighth signal) and the second signal use the same receive beam, such as both are received using the second receive beam.

[0224] Optionally, the signal transmitted by the fifth time domain resource (such as the ninth signal) may correspond to the first spatial domain parameter. For example, the ninth signal may correspond to the same spatial domain parameter as the first signal, that is, the first spatial domain parameter. Of course, the ninth signal may correspond to other spatial domain parameters without limitation. It is understandable that when the ninth signal and other signals transmitting data (such as the second signal) are transmitted using the same beam, the ISI caused by the time unit before the first time unit can be eliminated.

[0225] Optionally, the eighth signal and / or the ninth signal may be CP.

[0226] Optionally, the fourth time domain resource is also continuous with the second time domain resource.

[0227] As shown in Figure 5C, which is a schematic diagram of the time domain distribution of the first signal and the second signal, the RAN node can send the ninth signal to the terminal on time domain resource 507 (i.e., the fifth time domain resource), send the first signal to the terminal on time domain resource 508 (i.e., the first time domain resource), send the eighth signal to the terminal on time domain resource 509 (i.e., the fourth time domain resource), and send the second signal to the terminal on time domain resource 506 (i.e., the second time domain resource). The terminal receives the ninth signal on time domain resource 507 (i.e., the fifth time domain resource), receives the first signal on time domain resource 508 (i.e., the first time domain resource), receives the eighth signal on time domain resource 509 (i.e., the fourth time domain resource), and receives the second signal on time domain resource 506. Time domain resources 507, 508, and 509 are continuous with time domain resource 506 in the time domain, and time domain resource 507 follows time domain resource 508, time domain resource 509 follows time domain resource 508, and time domain resource 506 follows time domain resource 509. The second signal includes 10 signal sampling points. The RAN node may use the last three of these 10 signal sampling points as a cyclic prefix. For example, the first of these three signal sampling points may be used as the ninth signal, the second signal sampling point may be used as the first signal, and the third signal sampling point may be used as the eighth signal. Furthermore, the ninth signal and the first signal may correspond to the first spatial domain parameter, and the tenth signal and the second signal may correspond to the second spatial domain parameter. It should be understood that the ninth signal may also correspond to other spatial domain parameters, without limitation.

[0228] It is understandable that after S301a, the terminal can determine the third spatial domain parameter based on the first signal and the second signal. That is, S302 in the method shown in Figure 3 can be replaced by the following steps:

[0229] S302a: The terminal determines a third spatial domain parameter according to the first signal and the second signal.

[0230] In the present application, the third spatial domain parameter may be a beam center angle of a target beam, and the target beam is used to transmit data.

[0231] In one possible design, if the first spatial parameter, the second spatial parameter, and the third spatial parameter are spatial reception parameters of the terminal, the first spatial parameter may be the beam center angle of the first receive beam, the second spatial parameter may be the beam center angle of the second receive beam, and the third spatial parameter may be the beam center angle of the third receive beam. In this case, the target beam is the third receive beam. The third receive beam can be used for the terminal to receive signals. If the first spatial parameter, the second spatial parameter, and the third spatial parameter are spatial transmission parameters of the RAN node, the first spatial parameter may be the beam center angle of the first transmit beam, the second spatial parameter may be the beam center angle of the second transmit beam, and the third spatial parameter may be the beam center angle of the third transmit beam. In this case, the target beam is the third transmit beam. The third transmit beam can be used for the RAN node to transmit signals.

[0232] In one possible design, the terminal may determine an offset of the third spatial domain parameter relative to the first spatial domain parameter or the second spatial domain parameter based on the first signal and the second signal. It should be understood that by determining the offset of the third spatial domain parameter relative to the first spatial domain parameter or the second spatial domain parameter, the terminal can determine the third spatial domain parameter. This is specifically described below using the offset of the third receive beam relative to the beam center angle of the first receive beam as an example.

[0233] For example, as shown in FIG5D , η represents the offset of the beam center angle of the third receive beam relative to the beam center angle of the first receive beam. η can be expressed as a multiple of θ, where θ is the deviation between the beam center angle of the first receive beam and the beam center angle of the second receive beam, i.e., η = x·θ (x>0). The center angle of the third receive beam can be calculated using the sum-difference formula, for example, η and the beam center angle of the first receive beam The relationship between them can satisfy formula (2).

[0234] Where δ is the difference between the beam center angle of the second receive beam and the beam center angle of the first receive beam, a is the receiving power of the first receiving beam receiving the first signal, and b is the receiving power corresponding to the second receiving beam receiving the second signal. For example, the receiving power corresponding to the second receiving beam receiving the second signal is the receiving power of the second beam receiving a part of the second signal, that is, the receiving power of the second beam receiving the part of the second signal selected as the first signal, such as the receiving power of the second beam receiving the signal at the last three signal sampling points in 502 in Figure 5A, or the receiving power of the second beam receiving the signal at the second to last and third signal sampling points in 504 in Figure 5B.

[0235] It can be understood that the relationship between the offset of the third receive beam relative to the beam center angle of the second receive beam and the beam center angle of the second receive beam is similar to formula (2). For example, η in formula (2) can be replaced by the relative offset of the center angle of the third receive beam relative to the beam center angle of the second receive beam, and the relationship between the third receive beam and the beam center angle of the second receive beam is similar to formula (2). It can be replaced by the beam center angle of the second receive beam.

[0236] Optionally, the terminal may indicate to the RAN node whether the third spatial domain parameter is calculated relative to the beam center angle of the first receive beam or the beam center angle of the second receive beam.

[0237] It is understandable that the terminal can use the beam for receiving the first signal (i.e., the first receive beam) and the beam for receiving the second signal (i.e., the second receive beam) to determine a suitable receive beam, such as the third receive beam. Therefore, there is no need to additionally transmit a reference signal for beam tracking, and the receiving end can receive signals on the appropriate receive beam. Therefore, the RAN node does not need to allocate additional time domain resources for the terminal to transmit reference signals for beam tracking, thereby reducing the time domain overhead of the reference signals used for beam tracking. It is understandable that if the terminal cannot use the beam for receiving the first signal (i.e., the first receive beam) and the beam for receiving the second signal (i.e., the second receive beam) to determine a suitable receive beam, the terminal needs to receive reference signals for beam tracking on one or more additional symbols to determine a suitable receive beam. In this embodiment, because the terminal can use the beam for receiving the first signal (i.e., the first receive beam) and the beam for receiving the second signal (i.e., the second receive beam) to determine a suitable receive beam, the terminal can implement beam tracking using the cyclic prefix within the symbol without the need to transmit reference signals for beam tracking on one or more additional symbols.

[0238] The above is a specific process of the terminal determining the third receiving beam according to the first signal and the second signal. After the terminal determines the third receiving beam, it can use the third receiving beam to receive data.

[0239] It can be understood that the terminal can also determine the third transmit beam based on the first signal and the second signal. The process of the terminal determining the third transmit beam is similar to the process of the terminal determining the third receive beam. The difference is that the relationship between the offset of the third transmit beam relative to the beam center angle of the first transmit beam and the beam center angle of the first transmit beam is different from the relationship between the offset of the third receive beam relative to the beam center angle of the first receive beam and the beam center angle of the first receive beam. For example, η in formula (2) can be replaced by the offset of the beam center angle of the third transmit beam relative to the first transmit beam, and η in formula (2) can be replaced by the offset of the beam center angle of the third transmit beam relative to the first transmit beam. can be replaced by the beam center angle of the first transmit beam, δ in formula (2) can be replaced by the difference between the beam center angle of the second transmit beam and the beam center angle of the first transmit beam, and θ in formula (2) can be replaced by the deviation between the beam center angle of the first transmit beam and the beam center angle of the second transmit beam.

[0240] Similarly, the relationship between the offset of the third transmit beam relative to the beam center angle of the second transmit beam and the beam center angle of the second transmit beam is different from the relationship between the offset of the third receive beam relative to the beam center angle of the second receive beam and the beam center angle of the second receive beam. For example, η in formula (2) can be replaced by the offset of the third transmit beam relative to the beam center angle of the second transmit beam, and η in formula (2) can be replaced by the offset of the third transmit beam relative to the beam center angle of the second transmit beam. can be replaced by the beam center angle of the second transmit beam, δ in formula (2) can be replaced by the difference between the beam center angle of the second transmit beam and the beam center angle of the first transmit beam, and θ in formula (2) can be replaced by the deviation between the beam center angle of the first transmit beam and the beam center angle of the second transmit beam.

[0241] The above is the specific process of the terminal determining the third transmit beam based on the first signal and the second signal. After determining the third transmit beam, the terminal may indicate the third transmit beam to the RAN node, so that the RAN node communicates with the terminal based on the third transmit beam. For example, the terminal may send first indication information indicating the third spatial domain parameter to the RAN node. This process will be described in S303 below and is not further described here.

[0242] Optionally, the terminal may also report its capabilities to the RAN node so that the RAN node can determine whether to communicate with the terminal using the method shown in Figure 3 or Figure 4. For example, the terminal may send first capability information to the RAN node to indicate whether the terminal has the capability to transmit different signals using different spatial parameters. For example, the first capability information may indicate whether the terminal supports receiving a first signal and a second signal using different spatial parameters. Thus, after receiving the terminal's capability information, the RAN node can determine whether to communicate with the terminal using the method shown in Figure 3 or Figure 4.

[0243] For example, when the terminal capability information indicates that the terminal has the ability to transmit different signals using different spatial parameters, the terminal can use different receiving beams to respectively receive the first signal and the second signal, and then determine a suitable receiving beam (such as a third receiving beam) from the different receiving beams. The terminal still uses the third receiving beam for reception when subsequently receiving signals. When the terminal capability information indicates that the terminal does not have the ability to transmit different signals using different spatial parameters, the terminal can use one receiving beam to receive the first signal and the second signal from the RAN node, and determine an angular offset between the suitable transmitting beam and the beam center of the first transmitting beam or the second transmitting beam from the first transmitting beam corresponding to the first signal and the second transmitting beam corresponding to the second signal, so that the RAN node can refer to the angular offset when determining the beam center angle of the third transmitting beam.

[0244] Optionally, the RAN node may send second indication information to the terminal. Accordingly, the terminal receives the second indication information from the RAN node. The second indication information may indicate whether the first transmit beam (i.e., the transmit beam of the first signal) and the second transmit beam (i.e., the transmit beam of the second signal) are the same. For example, if the first transmit beam and the second transmit beam are different, the second indication information indicates that they are different. If the second indication information indicates that the first transmit beam and the second transmit beam are different, the terminal determines the third spatial domain parameter based on the first signal and the second signal.

[0245] It will be appreciated that in the above process, after the RAN node transmits the first signal on the first time domain resource and the second signal on the second time domain resource, the terminal can determine a third receive beam based on the first receive beam and the second receive beam, thereby facilitating better reception of the third signal from the RAN node. Alternatively, the terminal can also determine a third transmit beam based on the first transmit beam and the second transmit beam, enabling the RAN node to transmit the signal using the third transmit beam. This eliminates the need to transmit reference signals for beam tracking, allowing more time domain resources to transmit data and improving the spectral efficiency of data transmission.

[0246] Optionally, in one possible implementation of the method shown in FIG3 , to improve the signal-to-noise ratio of the signal received by the terminal and thereby improve the accuracy of beam tracking, the RAN node may send a third signal to the terminal on a sixth time domain resource within the second time unit and a fourth signal to the terminal on a seventh time domain resource within the second time unit. Accordingly, the terminal may receive the third signal on the sixth time domain resource within the second time unit and the fourth signal on the seventh time domain resource within the second time unit. The sixth time domain resource is used to transmit part or all of the cyclic prefix. The third and fourth signals may be used to determine the third spatial domain parameter. This is described in detail below.

[0247] In one possible design, the second time unit can be continuous with the first time unit, or located in the same subframe, or other locations are not limited. The seventh time domain resource follows the sixth time domain resource. The RAN node uses the fourth transmit beam to send the fourth signal to the terminal on the sixth time domain resource of the second time unit, and uses the fifth transmit beam to send the fifth signal to the terminal on the seventh time domain resource of the second time unit. It can be understood that in the time domain, the fourth signal is similar to the first signal. For details, please refer to the introduction of the first signal. The fifth signal is similar to the second signal. For details, please refer to the introduction of the second signal. The fifth signal follows the fourth signal.

[0248] Exemplarily, similar to the method described in FIG3 or 4 , the terminal may use one receiving beam to receive the fourth signal and the fifth signal, and determine a suitable transmitting beam for the RAN node. Specifically, in the first time unit and the second time unit, the first transmitting beam corresponding to the first signal may be different from the second transmitting beam corresponding to the second signal, the fourth transmitting beam corresponding to the fourth signal may be different from the fifth transmitting beam corresponding to the fifth signal, the first transmitting beam and the fourth transmitting beam may be the same, and the second transmitting beam and the fifth transmitting beam may be the same. That is, the RAN node transmits the first signal and the fourth signal respectively through the first transmitting beam, and transmits the second signal and the fifth signal respectively through the second transmitting beam. The terminal may accumulate the receiving powers corresponding to the first signal and the fourth signal to obtain the receiving power corresponding to the first transmitting beam (i.e., the value of parameter a to be used in formula (2)). The terminal may accumulate the receiving powers corresponding to the second signal and the fifth signal to obtain the receiving power corresponding to the second transmitting beam (i.e., the value of parameter b to be used in formula (2)). Then, based on the values ​​of a, b and The value of ξ can be calculated and put into formula (2) for calculation, and =x·θ is equal to the relative offset of the beam center angle of the first transmit beam. According to formula (2), x·θ is obtained. The value of x·θ is the relative offset of the center angle of the third transmit beam with respect to the beam center angle of the first transmit beam. This relative offset is used to determine an appropriate transmit beam for the RAN node. It should be understood that the above process can also be similarly applied to more time units, and so on, and is not further described.

[0249] Alternatively, when the fourth transmit beam is the same as the fifth transmit beam, the terminal uses the fourth receive beam to receive the fourth signal on the sixth time domain resource of the second time unit, and uses the fifth receive beam to receive the fifth signal on the seventh time domain resource of the second time unit, and then determines the appropriate receive beam. Specifically, in the first time unit and the second time unit (which may also include more time units), the first receive beam corresponding to the first signal and the second receive beam corresponding to the second signal may be different, the fourth receive beam corresponding to the fourth signal and the fifth receive beam corresponding to the fifth signal may be different, the first receive beam and the fourth receive beam may be the same, and the second receive beam and the fifth receive beam may be the same. That is, the terminal receives the first signal and the fourth signal respectively through the first receiving beam, and receives the second signal and the fifth signal respectively through the second receiving beam. The terminal can accumulate the receiving powers corresponding to the first signal and the fourth signal to obtain the receiving power corresponding to the first receiving beam (that is, the value of the parameter a to be used in formula (2)), and accumulate the receiving powers of the second signal and the fifth signal to obtain the receiving power corresponding to the second receiving beam (that is, the value of the parameter b to be used in formula (2)). Then, according to the values ​​of a, b and The calculated value of ξ is substituted into formula (2), and =x·θ is equal to the relative offset of the beam center angle of the first receive beam. According to formula (2), the value of x·θ can be obtained. The value of x·θ is the relative offset of the center angle of the third receive beam with respect to the beam center angle of the first receive beam. This relative offset is used to determine an appropriate receive beam for the terminal. It should be understood that the above process can be applied to more time units, and so on, and will not be repeated here.

[0250] Optionally, the RAN node may indicate to the terminal which time units can adopt the communication method provided in this application. Taking the frame structure of 5G as an example, a subframe includes 14 OFDM symbols (one OFDM symbol may correspond to a time unit of this application, such as the first time unit), and the RAN node may indicate which OFDM symbols in a subframe can adopt the communication method provided in this application. For example, the RAN node may send a fourth indication message to the terminal. The fourth indication message includes 14 bits, each bit corresponding to an OFDM symbol in a subframe, and is used to indicate whether the OFDM symbol adopts the method provided in this application. After receiving the fourth indication message, the terminal may determine which OFDM symbols can adopt the method provided in this application based on the fourth indication message. For example, the fourth indication message includes "10010000000000", which may indicate that the first symbol and the fourth symbol in a subframe can adopt the communication method provided in this application. It can be understood that the terminal can determine the third spatial domain parameter based on the signal in the first symbol and the signal in the fourth symbol respectively, or the terminal can accumulate the receiving power of the signal in the first symbol and the signal in the fourth symbol to calculate the third spatial domain parameter, without restriction.

[0251] Optionally, the second time unit may be the same time unit as the aforementioned third time unit, or a different time unit, without limitation.

[0252] The above only describes the process of determining the third airspace parameter by taking two time units (such as the first time unit and the second time unit) as an example. In specific applications, the terminal may also determine the third airspace parameter by combining more time units, which will not be described in detail.

[0253] It is understandable that in the above process, in addition to combining the first signal and the second signal, the terminal can also combine the third signal and the fourth signal to determine the third spatial domain parameter for the signal corresponding to the same spatial domain parameter. It should be understood that when the terminal uses the same receive beam to receive multiple signals on different time domain resources, such as using the first receive beam to receive the first signal and the third signal, and using the second receive beam to receive the second signal and the fourth signal, the receive power of the signal corresponding to the same spatial domain parameter will be accumulated, thereby improving the signal-to-noise ratio and further improving the accuracy of beam determination.

[0254] Optionally, the RAN node may further send third indication information to the terminal to indicate the first time domain resource. In this way, after receiving the third indication information, the terminal may determine the first time domain resource according to the third indication information and receive the first signal in the first time domain resource.

[0255] Exemplarily, the third indication information includes the start position and / or the time domain length of the first time domain resource. Taking the case where the third indication information includes the start position of the first time domain resource (such as L0) as an example, the range of the first time domain resource can be: starting from L0 and ending at the time domain position of (L0 + L), where the time domain length L (0 < L < N) is preset by the RAN node (such as indicated by a length of x signal sampling points, etc.), and L can also be included in the third indication information. Taking the case where the third indication information includes the time domain length of the third time domain resource (such as L) as an example, the range of the third time domain resource can be: starting from L0 (L0 is preset, such as the start position of the first time unit in the time domain) and ending at the time domain position of (L0 + L).

[0256] Optionally, in a possible implementation manner of the method shown in FIG. 3, the terminal indicates information related to the third spatial domain parameter to the RAN node, so that the RAN node can determine the third spatial domain parameter based on this information, and then communicate with the terminal through the third transmission beam. Specifically, as shown in FIG. 4, the method shown in FIG. 3 further includes the following steps:

[0257] S303: The terminal sends the first indication information to the RAN node. Correspondingly, the RAN node receives the first indication information from the terminal.

[0258] In this application, the first indication information is used to indicate the third spatial domain parameter. Optionally, the third spatial domain parameter is the central angle of the target beam. The target beam can be used to transmit data. The target beam can be used for the RAN node to send signals (for example, the target beam can be the third transmission beam).

[0259] Exemplarily, the first indication information can indicate the central angle of the third transmission beam. For example, the first indication information includes the offset of the central angle of the third transmission beam relative to the central angle of the first transmission beam or includes the offset of the central angle of the third transmission beam relative to the central angle of the second transmission beam, so that the RAN node can determine the third transmission beam based on this offset. Or the first indication information can also indicate the third receiving beam of the terminal.

[0260] In addition to the above manner, the terminal can also quantize the offset and indicate the quantized value to the RAN node. For example, the first indication information includes the index corresponding to this offset.

[0261] In one possible implementation, when the terminal indicates the situation of the third transmit beam through the first indication information, the offset indicated by the first indication information can be quantized based on θ mentioned above (θ can represent the deviation between the beam center angle of the first transmit beam and the beam center angle of the second transmit beam), such as the beam center angle offset η of the third transmit beam = x·θ, where x is the quantized value of η based on θ. Exemplarily, the terminal can determine the beam center angle offset η = x·θ of the third transmit beam according to formula (2), and indicate the value of x to the RAN node, so that the RAN node can know the value of η. Each relative offset x can be referred to by an index in Table 1, and the value of the index can be {0, 1, ..., N-1}, where N is an integer greater than or equal to 1. The corresponding relationship between the index and the relative offset is shown in Table 1.

[0262] Table 1

[0263] For example, taking θ=45° and N=10 as an example, when the above offset is 22.5°, the terminal can indicate to the RAN node that the offset is 22.5°, or indicate to the RAN node the offset index

[0264] Optionally, the RAN node sends a signal to the terminal through a third transmit beam. Correspondingly, the terminal receives a third signal from the RAN node through a third receive beam.

[0265] In one possible implementation, the RAN node may determine the angle of the third transmit beam for ultimately transmitting the third signal based on the third transmit beam indicated by the terminal, after comprehensively considering factors such as its own computing capabilities, available beam resources, or time domain resources. It should be understood that the real-world environment is complex, and RAN nodes must consider many factors. The third transmit beam determined by the RAN node based on all these factors may not be the third transmit beam indicated by the terminal, and this is not a restriction.

[0266] It is understandable that the actions of the RAN node or terminal in the above S301-S303 can be executed by the processor 201 in the communication device 20 shown in Figure 2 calling the application code stored in the memory 203, and this application does not impose any limitation on this.

[0267] As shown in FIG6 , another communication method provided by the present application may include the following steps:

[0268] S601: The terminal determines first capability information.

[0269] The first capability information indicates whether the transmission of the first signal and the second signal using different spatial domain parameters is supported; the time domain resource of the first signal is the first time domain resource within the first time unit, the time domain resource of the second signal is the second time domain resource within the first time unit, the first time unit includes the second time domain resource and the third time domain resource, the first time domain resource is included in the third time domain resource, and the third time domain resource is used to transmit a cyclic prefix. It can be understood that the introduction of the first capability information, the first signal, the second signal, the first time unit, the first time domain resource, the second time domain resource, and the third time domain resource can refer to the corresponding description of the method shown in Figure 3 or Figure 4, and will not be repeated here.

[0270] S602: The terminal sends first capability information to the RAN node. Correspondingly, the RAN node receives the capability information from the terminal.

[0271] It is understandable that after S602, the terminal and the RAN node can communicate using the method shown in Figure 3 or Figure 4 to improve the spectrum efficiency of data transmission and thereby improve the capacity of the communication system, which will not be described in detail.

[0272] It can be understood that the actions of the RAN node or terminal in the above S601-S602 can be executed by the processor 201 in the communication device 20 shown in Figure 2 calling the application code stored in the memory 203, and this application does not impose any limitation on this.

[0273] Based on the method shown in Figure 6, the terminal can send first capability information to the RAN node, so that the RAN node can learn whether the terminal supports the transmission of the first signal and the second signal respectively using different spatial parameters. If so, the RAN node can configure fewer reference signals in the second signal to reduce the reference signal overhead. This is especially true for high-speed mobile terminals that need to carry a high density of reference signals while transmitting data signals. This can greatly reduce the reference signal overhead.

[0274] The above primarily describes the solution provided by this application from the perspective of interaction between a terminal and a RAN node. Accordingly, this application also provides a communications device, which may be a terminal in the above-described method embodiments, or a device including such a terminal, or a component usable for a terminal; or, alternatively, a RAN node in the above-described method embodiments, or a device including such a RAN node, or a component usable for a RAN node. It will be understood that, to implement the aforementioned functions, the terminal or RAN node, etc., includes hardware structures and / or software modules corresponding to the respective functions. Those skilled in the art will readily appreciate that, in conjunction with the various exemplary units and algorithmic operations described in the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is implemented in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Professionals may use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0275] This application can divide the terminal and RAN node into functional modules based on the above-mentioned method examples. For example, different functional modules can be divided according to different functions, or two or more functions can be integrated into a single processing module. The above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be understood that the module division in this application is illustrative and only represents a logical functional division. In actual implementation, other division methods may be used.

[0276] For example, FIG7 shows a schematic diagram of the structure of a communication device 70, where the functional modules are divided in an integrated manner. Communication device 70 includes an interface module 701 and a processing module 702. Interface module 701, also known as an interface unit, is configured to perform transceiver operations and may be, for example, an interface circuit, a transceiver, a transceiver, or a communication interface. Processing module 702, also known as a processing unit, is configured to perform operations other than transceiver operations and may be, for example, a processing circuit or a processor.

[0277] In some embodiments, the communication device 70 may further include a storage module (not shown in FIG. 7 ) for storing program instructions and data.

[0278] Exemplarily, the communication device 70 is used to implement the functions of a terminal. The communication device 70 is, for example, the terminal of the embodiment shown in FIG3 or the embodiment shown in FIG4.

[0279] The interface module 701 is configured to receive a first signal on a first time domain resource within a first time unit. The first time unit includes a third time domain resource, the third time domain resource being used to carry a cyclic prefix; and the first time domain resource being part or all of the third time domain resource. For example, the interface module 701 may be configured to execute S301.

[0280] The processing module 702 is configured to determine a third spatial domain parameter based on the first signal, wherein the first signal corresponds to the first spatial domain parameter. For example, the processing module 702 may be configured to execute S302.

[0281] In one possible implementation, interface module 701 is further configured to receive a second signal on a second time domain resource within the first time unit; the second signal corresponds to a second spatial domain parameter, and the first spatial domain parameter is different from the second spatial domain parameter. For example, interface module 701 may be configured to execute S301a. Processing module 702 is specifically configured to determine a third spatial domain parameter based on the first signal and the second signal. The second signal corresponds to the second spatial domain parameter, and the first spatial domain parameter is different from the second spatial domain parameter. For example, processing module 702 may be configured to execute S302a.

[0282] In a possible implementation manner, the third time domain resources include the first time domain resources and the fourth time domain resources.

[0283] In a possible implementation manner, in the time domain, the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0284] In one possible implementation, the third time domain resource includes the first time domain resource, the fourth time domain resource and the fifth time domain resource. In the time domain, the fifth time domain resource is located before the first time domain resource and is continuous with the first time domain resource, and the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0285] In a possible implementation manner, the fourth time domain resource corresponds to the second spatial domain parameter.

[0286] In one possible implementation, the interface module 701 is also used to receive a third signal on a sixth time domain resource within the second time unit; the interface module 701 is also used to receive a fourth signal on a seventh time domain resource within the second time unit; wherein, the second time unit includes the seventh time domain resource and the eighth time domain resource, and the eighth time domain resource is used to carry a cyclic prefix; the sixth time domain resource is part of the time domain resource or all of the time domain resource of the eighth time domain resource; the third signal corresponds to the first spatial domain parameter, and the fourth signal corresponds to the second spatial domain parameter; the processing module 702 is specifically used to determine the third spatial domain parameter based on the first signal, the second signal, the third signal and the fourth signal.

[0287] In a possible implementation, the first spatial parameter, the second spatial parameter, and the third spatial parameter are spatial reception parameters of a first device, and the first device is a device that receives the first signal and the second signal.

[0288] In a possible implementation, the interface module 701 is further configured to send first capability information, where the first capability information indicates whether the first device supports transmitting the first signal and the second signal respectively through different spatial parameters.

[0289] In a possible implementation, the first spatial domain parameter, the second spatial domain parameter, and the third spatial domain parameter are spatial domain transmission parameters of the second device, and the second device is a device that sends the first signal and the second signal.

[0290] In a possible implementation, the interface module 701 is further configured to send first indication information, where the first indication information is used to indicate the third spatial domain parameter. For example, the interface module 701 may be configured to execute S303.

[0291] In a possible implementation, the third spatial domain parameter is a center angle of a target beam, and the target beam is used to transmit data.

[0292] In a possible implementation, the interface module 701 is further configured to receive second indication information, where the second indication information is used to indicate that the first spatial domain parameter is different from the second spatial domain parameter.

[0293] When used to implement the functions of the terminal, for other functions that the communication device 70 can implement, reference can be made to the relevant introduction of the embodiment shown in Figure 3 or the embodiment shown in Figure 4, and no further details will be given.

[0294] Alternatively, illustratively, the communication device 70 is used to implement the functions of a RAN node. The communication device 70 is, for example, the RAN node in the embodiment shown in FIG3 or the embodiment shown in FIG4 .

[0295] Interface module 701 is configured to send a first signal on a first time domain resource within a first time unit. The first time unit includes a second time domain resource and a third time domain resource, the third time domain resource being used to carry a cyclic prefix; the first time domain resource being part or all of the third time domain resource; and the first signal corresponding to a first spatial domain parameter, which is used to determine the third spatial domain parameter. For example, interface module 701 may be configured to execute S301.

[0296] In one possible implementation, processing module 702 is configured to control interface module 701 to send a second signal on a second time domain resource within a first time unit. The second signal corresponds to a second spatial domain parameter, the first spatial domain parameter and the second spatial domain parameter are different, and the second signal is used to determine a third spatial domain parameter. For example, interface module 701 may be configured to execute S301a.

[0297] In a possible implementation manner, the third time domain resources include the first time domain resources and the fourth time domain resources.

[0298] In a possible implementation manner, in the time domain, the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0299] In one possible implementation, the third time domain resource includes the first time domain resource, the fourth time domain resource and the fifth time domain resource. In the time domain, the fifth time domain resource is located before the first time domain resource and is continuous with the first time domain resource, and the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0300] In a possible implementation manner, the fourth time domain resource corresponds to the second spatial domain parameter.

[0301] In one possible implementation, the interface module 701 is also used to send a third signal on a sixth time domain resource within the second time unit; the interface module 701 is also used to send a fourth signal on a seventh time domain resource within the second time unit; wherein the second time unit includes the seventh time domain resource and the eighth time domain resource, and the eighth time domain resource is used to carry a cyclic prefix; the sixth time domain resource is part of the time domain resource or all of the time domain resource of the eighth time domain resource; the third signal corresponds to a fourth airspace parameter, the fourth signal corresponds to a fifth airspace parameter, the fourth airspace parameter and the fifth airspace parameter are different, and the third signal and the fourth signal are used to determine the third airspace parameter.

[0302] In a possible implementation, the first spatial parameter, the second spatial parameter, and the third spatial parameter are spatial reception parameters of a first device, and the first device is a device that receives the first signal and the second signal.

[0303] In a possible implementation, the interface module 701 is further configured to receive first capability information, where the first capability information indicates whether the first device supports transmitting the first signal and the second signal respectively through different spatial parameters.

[0304] In a possible implementation, the first spatial domain parameter, the second spatial domain parameter, and the third spatial domain parameter are spatial domain transmission parameters of the second device, and the second device is a device that sends the first signal and the second signal.

[0305] In a possible implementation, the interface module 701 is further configured to receive first indication information, where the first indication information is used to indicate the third spatial domain parameter. For example, the interface module 701 may be configured to execute S303.

[0306] In a possible implementation, the third spatial domain parameter is a center angle of a target beam, and the target beam is used to transmit data.

[0307] In a possible implementation, the interface module 701 is further configured to send second indication information, where the second indication information is used to indicate that the first airspace parameter and the second airspace parameter are different.

[0308] When used to implement the functions of a RAN node, for other functions that the communication device 70 can implement, reference may be made to the relevant introduction of the embodiment shown in FIG3 or FIG4 , and no further details will be given.

[0309] Alternatively, illustratively, the communication device 70 is used to implement the functions of a terminal. The communication device 70 is, for example, the terminal of the embodiment shown in FIG6 .

[0310] The processing module 702 is configured to determine first capability information. The first capability information indicates whether the transmission of the first signal and the second signal using different spatial domain parameters is supported. The time domain resource of the first signal is the first time domain resource within the first time unit, the time domain resource of the second signal is the second time domain resource within the first time unit, the first time unit includes the second time domain resource and the third time domain resource, the first time domain resource is included in the third time domain resource, and the third time domain resource is used to transmit a cyclic prefix. For example, the processing module 702 can be configured to execute S601. The interface module 701 is configured to send the first capability information. For example, the interface module 701 can be configured to execute S602.

[0311] In a possible implementation, the spatial domain parameter is a spatial domain receiving parameter or a spatial domain sending parameter.

[0312] In one possible implementation, the first capability information indicates support for transmitting the first signal and the second signal respectively through different spatial domain parameters, and the interface module 701 is also used to transmit the first signal on the first time domain resource; the interface module 701 is also used to transmit the second signal on the second time domain resource; wherein, the first signal corresponds to the first spatial domain parameter, the second signal corresponds to the second spatial domain parameter, the first spatial domain parameter and the second spatial domain parameter are different, and the first signal and the second signal are used to determine the third spatial domain parameter.

[0313] In a possible implementation manner, the third time domain resources include the first time domain resources and the fourth time domain resources.

[0314] In a possible implementation manner, in the time domain, the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0315] In one possible implementation, the third time domain resource includes the first time domain resource, the fourth time domain resource and the fifth time domain resource. In the time domain, the fifth time domain resource is located before the first time domain resource and is continuous with the first time domain resource, and the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0316] In a possible implementation manner, the fourth time domain resource corresponds to the second spatial domain parameter.

[0317] In one possible implementation, the interface module 701 is also used to transmit a third signal on a sixth time domain resource within the second time unit; the interface module 701 is also used to transmit a fourth signal on a seventh time domain resource within the second time unit; wherein the second time unit includes the seventh time domain resource and the eighth time domain resource, and the eighth time domain resource is used to carry a cyclic prefix; the sixth time domain resource is part of or all of the eighth time domain resource; the third signal corresponds to the first spatial domain parameter, the fourth signal corresponds to the second spatial domain parameter, and the third signal and the fourth signal are used to determine the third spatial domain parameter.

[0318] In a possible implementation, the first spatial parameter, the second spatial parameter, and the third spatial parameter are spatial reception parameters of a first device, and the first device is a device that receives the first signal and the second signal.

[0319] In a possible implementation, the first spatial domain parameter, the second spatial domain parameter, and the third spatial domain parameter are spatial domain transmission parameters of the second device, and the second device is a device that sends the first signal and the second signal.

[0320] In a possible implementation, the interface module 701 is further configured to send first indication information; the first indication information is used to indicate the third spatial domain parameter.

[0321] In a possible implementation, the third spatial domain parameter is a center angle of a target beam, and the target beam is used to transmit data.

[0322] In a possible implementation, the interface module 701 is further configured to receive second indication information, where the second indication information is used to indicate that the first spatial domain parameter is different from the second spatial domain parameter.

[0323] When used to implement the functions of the terminal, for other functions that the communication device 70 can implement, reference can be made to the relevant introduction of the embodiment shown in FIG6 , and no further details will be given.

[0324] Alternatively, illustratively, the communication device 70 is used to implement the function of a RAN node. The communication device 70 is, for example, the RAN node of the embodiment shown in FIG6 .

[0325] Interface module 701 is configured to receive first capability information. The first capability information indicates whether the terminal supports transmitting a first signal and a second signal using different spatial domain parameters, respectively. The time domain resources of the first signal are first time domain resources within a first time unit, the time domain resources of the second signal are second time domain resources within the first time unit, the first time unit includes the second time domain resources and a third time domain resource, the first time domain resource is included in the third time domain resource, and the third time domain resource is used to transmit a cyclic prefix. For example, interface module 701 may be configured to execute S602.

[0326] The processing module 702 is configured to communicate with the terminal according to the first capability information.

[0327] In a possible implementation, the spatial domain parameter is a spatial domain receiving parameter or a spatial domain sending parameter.

[0328] In one possible implementation, the first capability information indicates that the terminal supports transmitting the first signal and the second signal respectively through different spatial domain parameters, and the interface module 701 is specifically used to transmit the first signal on the first time domain resource; the interface module 701 is also specifically used to transmit the second signal on the second time domain resource; wherein, the first signal corresponds to the first spatial domain parameter, the second signal corresponds to the second spatial domain parameter, the first spatial domain parameter and the second spatial domain parameter are different, and the first spatial domain parameter and the second spatial domain parameter are used to determine the third spatial domain parameter.

[0329] In a possible implementation manner, the third time domain resources include the first time domain resources and the fourth time domain resources.

[0330] In a possible implementation manner, in the time domain, the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0331] In one possible implementation, the third time domain resource includes the first time domain resource, the fourth time domain resource and the fifth time domain resource. In the time domain, the fifth time domain resource is located before the first time domain resource and is continuous with the first time domain resource, and the fourth time domain resource is located after the first time domain resource and before the second time domain resource, and is continuous with the first time domain resource.

[0332] In a possible implementation manner, the fourth time domain resource corresponds to the second spatial domain parameter.

[0333] In one possible implementation, the interface module 701 is also used to transmit a third signal on a sixth time domain resource within the second time unit; the interface module 701 is also used to transmit a fourth signal on a seventh time domain resource within the second time unit; wherein the second time unit includes a seventh time domain resource and an eighth time domain resource, and the eighth time domain resource is used to carry a cyclic prefix; the sixth time domain resource is part of or all of the eighth time domain resource; the third signal corresponds to a fourth spatial domain parameter, the fourth signal corresponds to a fifth spatial domain parameter, the fourth spatial domain parameter and the fifth spatial domain parameter are different, and the third signal and the fourth signal are used to determine the third spatial domain parameter.

[0334] In a possible implementation, the first spatial parameter, the second spatial parameter, and the third spatial parameter are spatial reception parameters of a first device, and the first device is a device that receives the first signal and the second signal.

[0335] In a possible implementation, the first spatial domain parameter, the second spatial domain parameter, and the third spatial domain parameter are spatial domain transmission parameters of the second device, and the second device is a device that sends the first signal and the second signal.

[0336] In a possible implementation, the interface module 701 is further configured to receive first indication information; the first indication information is used to indicate the third spatial domain parameter.

[0337] In a possible implementation, the third spatial domain parameter is a center angle of a target beam, and the target beam is used to transmit data.

[0338] In a possible implementation, the interface module 701 is further configured to send second indication information, where the second indication information is used to indicate that the first airspace parameter and the second airspace parameter are different.

[0339] When used to implement the function of a RAN node, for other functions that the communication device 70 can implement, reference can be made to the relevant introduction of the embodiment shown in FIG6 , and no further details will be given.

[0340] In a simple embodiment, those skilled in the art may conceive that the communication device 70 may be in the form shown in Figure 2. For example, the processor 201 in Figure 2 may call computer-executable instructions stored in the memory 203 to enable the communication device 70 to execute the method described in the above embodiment.

[0341] Exemplarily, the functions / implementation processes of the interface module 701 and the processing module 702 in FIG7 can be implemented by the processor 201 in FIG2 calling computer-executable instructions stored in the memory 203. Alternatively, the functions / implementation processes of the processing module 702 in FIG7 can be implemented by the processor 201 in FIG2 calling computer-executable instructions stored in the memory 203, and the functions / implementation processes of the interface module 701 in FIG7 can be implemented by the communication interface 204 in FIG2.

[0342] It is understandable that one or more of the above modules or units can be implemented by software, hardware or a combination of the two. When any of the above modules or units is implemented by software, the software exists in the form of computer program instructions and is stored in a memory, and a processor can be used to execute the program instructions and implement the above method flow. The processor can be built into an SoC (system on chip) or an ASIC, or it can be an independent semiconductor chip. In addition to the core used to execute software instructions to perform calculations or processing within the processor, it can further include necessary hardware accelerators, such as field programmable gate arrays (FPGAs), PLDs (programmable logic devices), or logic circuits that implement dedicated logic operations.

[0343] When the above modules or units are implemented in hardware, the hardware can be any one or any combination of a CPU, a microprocessor, a digital signal processing (DSP) chip, a microcontroller unit (MCU), an artificial intelligence processor, an ASIC, a SoC, an FPGA, a PLD, a dedicated digital circuit, a hardware accelerator or a non-integrated discrete device, which can run the necessary software or not rely on the software to execute the above method flow.

[0344] Optionally, the present application also provides a chip system, comprising: at least one processor and an interface, wherein the at least one processor is coupled to a memory via the interface, and when the at least one processor executes a computer program or instruction in the memory, the method in any of the above method embodiments is executed. In one possible implementation, the chip system also includes a memory. Optionally, the chip system can be composed of a chip, or can include a chip and other discrete devices, which is not specifically limited in this application.

[0345] Optionally, the present application also provides a computer-readable storage medium. All or part of the processes in the above-mentioned method embodiments can be completed by a computer program to instruct the relevant hardware. The program can be stored in the above-mentioned computer-readable storage medium. When the program is executed, it can include the processes of the above-mentioned method embodiments. The computer-readable storage medium can be an internal storage unit of the communication device of any of the above-mentioned embodiments, such as a hard disk or memory of the communication device. The above-mentioned computer-readable storage medium can also be an external storage device of the above-mentioned communication device, such as a plug-in hard disk, a smart memory card (smart media card, SMC), a secure digital (secure digital, SD) card, a flash card (flash card), etc. equipped on the above-mentioned communication device. Furthermore, the above-mentioned computer-readable storage medium can also include both the internal storage unit of the above-mentioned communication device and an external storage device. The above-mentioned computer-readable storage medium is used to store the above-mentioned computer program and other programs and data required by the above-mentioned communication device. The above-mentioned computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.

[0346] Optionally, the present application also provides a computer program product. All or part of the processes in the above method embodiments may be completed by a computer program instructing related hardware. The program may be stored in the above computer program product, and when executed, the program may include the processes in the above method embodiments.

[0347] Optionally, the present application also provides a computer instruction. All or part of the process in the above method embodiment can be completed by the computer instruction to instruct the relevant hardware (such as a computer, a processor, a signal transmitting end or a signal receiving end). The program can be stored in the above computer-readable storage medium or in the above computer program product.

[0348] Optionally, the present application also provides a communication system, including: the terminal and RAN node in the method shown in Figure 3.

[0349] Optionally, the present application also provides a communication system, including: the terminal and RAN node in the method shown in Figure 4.

[0350] Optionally, the present application also provides a communication system, including: the terminal and RAN node in the method shown in Figure 6.

[0351] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0352] In the several embodiments provided in this application, it should be understood that the disclosed 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 modules or 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 device, 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.

[0353] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0354] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0355] The above is only a specific embodiment of the present application, but the scope of protection of this application is not limited to this. Any changes or substitutions 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 communication method, characterized in that, The method includes: Receiving a first signal on a first time-domain resource within a first time unit; Receiving a second signal on a second time-domain resource within the first time unit; Wherein, the first time unit includes the second time-domain resource and a third time-domain resource, and the third time-domain resource is used to carry a cyclic prefix; the first time-domain resource is part or all of the third time-domain resource; the first signal corresponds to a first spatial parameter, the second signal corresponds to a second spatial parameter, and the first spatial parameter is different from the second spatial parameter; Determining a third spatial parameter according to the first signal and the second signal.

2. The method according to claim 1, characterized in that, The third time-domain resource includes the first time-domain resource and a fourth time-domain resource.

3. The method according to claim 2, wherein In the time domain, the fourth time-domain resource is located after the first time-domain resource and before the second time-domain resource, and is continuous with the first time-domain resource.

4. The method according to claim 1, wherein The third time-domain resource includes the first time-domain resource, a fourth time-domain resource, and a fifth time-domain resource. In the time domain, the fifth time-domain resource is located before the first time-domain resource and is continuous with the first time-domain resource, and the fourth time-domain resource is located after the first time-domain resource and before the second time-domain resource, and is continuous with the first time-domain resource.

5. The method according to any one of claims 2 - 4, characterized in that, The fourth time-domain resource corresponds to the second spatial parameter.

6. The method according to any one of claims 1-5, characterized in that The method further includes: Receiving a third signal on a sixth time-domain resource within a second time unit; Receiving a fourth signal on a seventh time-domain resource within the second time unit; Wherein, the second time unit includes the seventh time-domain resource and an eighth time-domain resource, and the eighth time-domain resource is used to carry a cyclic prefix; the sixth time-domain resource is part or all of the eighth time-domain resource; the third signal corresponds to the first spatial parameter, and the fourth signal corresponds to the second spatial parameter; The determining the third spatial parameter according to the first signal and the second signal includes: Determining the third spatial parameter according to the first signal, the second signal, the third signal, and the fourth signal.

7. The method according to any one of claims 1-6, characterized in that, The first spatial parameter, the second spatial parameter, and the third spatial parameter are spatial reception parameters of a first device, and the first device is the device that receives the first signal and the second signal.

8. The method according to claim 7, characterized in that The method further includes: Sending first capability information, where the first capability information indicates whether the first device supports transmitting the first signal and the second signal respectively with different spatial parameters.

9. The method according to any one of claims 1-6, characterized in that, The first spatial parameter, the second spatial parameter, and the third spatial parameter are spatial transmission parameters of a second device, and the second device is the device that transmits the first signal and the second signal.

10. The method according to claim 9, wherein The method further includes: Sending first indication information; the first indication information is used to indicate the third spatial parameter.

11. The method according to claim 10, characterized in that, The third spatial parameter is the central angle of a target beam, and the target beam is used to transmit data.

12. The method according to any one of claims 1-11, characterized in that, The method further includes: Receiving second indication information, where the second indication information is used to indicate that the first spatial parameter is different from the second spatial parameter.

13. A communication method, characterized in that, The method includes: Send a first signal on a first time-domain resource within a first time unit; Send a second signal on a second time-domain resource within the first time unit; Wherein, the first time unit includes the second time-domain resource and a third time-domain resource, and the third time-domain resource is used to carry a cyclic prefix; the first time-domain resource is part or all of the third time-domain resource; the first signal corresponds to a first spatial domain parameter, the second signal corresponds to a second spatial domain parameter, the first spatial domain parameter and the second spatial domain parameter are different, and the first signal and the second signal are used to determine a third spatial domain parameter.

14. The method according to claim 13, characterized in that, The third time-domain resource includes the first time-domain resource and a fourth time-domain resource.

15. The method according to claim 14, wherein In the time domain, the fourth time-domain resource is located after the first time-domain resource and before the second time-domain resource, and is continuous with the first time-domain resource.

16. The method according to claim 13, wherein The third time-domain resource includes a first time-domain resource, a fourth time-domain resource, and a fifth time-domain resource. In the time domain, the fifth time-domain resource is located before the first time-domain resource and is continuous with the first time-domain resource, and the fourth time-domain resource is located after the first time-domain resource and before the second time-domain resource, and is continuous with the first time-domain resource.

17. The method according to any one of claims 14 to 16, characterized in that The fourth time-domain resource corresponds to the second spatial domain parameter.

18. The method according to any one of claims 13 - 17, characterized in that, The method further includes: Send a third signal on a sixth time-domain resource within a second time unit; Send a fourth signal on a seventh time-domain resource within the second time unit; Wherein, the second time unit includes the seventh time-domain resource and an eighth time-domain resource, and the eighth time-domain resource is used to carry a cyclic prefix; the sixth time-domain resource is part or all of the eighth time-domain resource; the third signal corresponds to a fourth spatial domain parameter, the fourth signal corresponds to a fifth spatial domain parameter, the fourth spatial domain parameter and the fifth spatial domain parameter are different, and the third signal and the fourth signal are used to determine the third spatial domain parameter.

19. The method according to any one of claims 13-18, characterized in that The first spatial domain parameter, the second spatial domain parameter, and the third spatial domain parameter are spatial domain reception parameters of a first device, and the first device is a device that receives the first signal and the second signal.

20. The method according to claim 19, wherein The method further includes: Receive first capability information, where the first capability information indicates whether the first device supports transmitting the first signal and the second signal respectively through different spatial domain parameters.

21. The method according to any one of claims 14 - 18, characterized in that, The first spatial domain parameter, the second spatial domain parameter, and the third spatial domain parameter are spatial domain transmission parameters of a second device, and the second device is a device that transmits the first signal and the second signal.

22. The method according to claim 21, wherein The method further includes: Receive first indication information; the first indication information is used to indicate the third spatial domain parameter.

23. The method according to claim 22, wherein The third spatial domain parameter is the central angle of a target beam, and the target beam is used to transmit data.

24. The method according to any one of claims 13 - 23, characterized in that, The method further includes: Send second indication information, where the second indication information is used to indicate that the first spatial domain parameter and the second spatial domain parameter are different.

25. A communication device, characterized in that, Comprising units or modules for performing the method according to any one of claims 1 to 12, or comprising units or modules for performing the method according to any one of claims 13 to 24.

26. A communication device, characterized in that, Comprising: A processor, the processor being coupled to a memory for storing programs or instructions, which when executed by the processor cause the device to perform the method according to any one of claims 1 to 12, or to perform the method according to any one of claims 13 to 24.

27. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instructions are executed, cause the computer to perform the method according to any one of claims 1 to 12 or the method according to any one of claims 13 to 24.

28. A computer program product, comprising computer program code therein, characterized in that, When the computer program code runs on a computer, cause the computer to implement the method according to any one of claims 1 to 12 or to implement the method according to any one of claims 13 to 24.

29. A communication system, characterized in that, Comprising: Means for performing the method according to any one of claims 1 to 12, and / or means for performing the method according to any one of claims 13 to 24.

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