Communication method and related equipment

Abstract

A communication method and a related device are used for obtaining a measurement result of a channel between a network device and a terminal device based on measurement information, and also can obtain L1 pieces of relatively independent channel information so as to obtain measurement information with higher accuracy. In the method, a reference signal received by a terminal device is respectively sent through L1 first weights on L1 time units, the ith first weight in the L1 first weights is obtained through the ith second weight in L1 second weights and a third weight, and the L1 second weights are orthogonal. In other words, the reference signals transmitted in the L1 time units are sent through L1 second weights which are mutually orthogonal.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a communication method and related equipment. Background Art

[0002] As a key technology of wireless communication, multi-input multi-output (MIMO) technology can be used to meet the demand of high-speed transmission. However, in the communication process based on MIMO technology, how to measure the channel is a technical problem that needs to be solved urgently. Summary of the invention

[0003] The present application provides a communication method and related devices, which are used to obtain the measurement result of the channel between the network device and the terminal device based on the measurement information, and also obtain L 1 Relatively independent channel information can be used to obtain more accurate measurement information.

[0004] In a first aspect, the present application provides a communication method, which is executed by a terminal device, or the method is executed by some components (such as a processor, a chip or a chip system, etc.) in the terminal device, or the method can also be implemented by a logic module or software that can implement all or part of the functions of the terminal device. In the first aspect and its possible implementation, the communication method is described as being executed by a terminal device. In the method, the terminal device receives a reference signal; wherein the reference signal is L 1 The time units are respectively L 1 The first weight is sent, L 1 is an integer greater than 1; the L 1 The i-th first weight among the first weights is obtained by L 1 The L is obtained by combining the i-th second weight and the third weight among the second weights. 1 The second weights are orthogonal, and the value of i ranges from 1 to L 1 ; The terminal device sends measurement information, which is obtained by measuring the reference signal.

[0005] Based on the above technical solution, after the network device sends the reference signal, the reference signal is transmitted through the wireless channel, so that the reference signal received by the terminal device can carry the channel information of the wireless channel; thereafter, the measurement information obtained by the terminal device through measuring the reference signal can reflect the channel information, and the subsequent way in which the terminal device sends the measurement information can enable the network device to obtain the measurement result of the channel between the network device and the terminal device based on the measurement information.

[0006] In addition, the reference signal received by the terminal device is L 1In L time units, it is transmitted through L first weights. And, the i-th first weight among the L first weights is obtained by the i-th second weight among L second weights and a third weight. The L second weights are orthogonal. In other words, the reference signals transmitted in L time units are transmitted through L mutually orthogonal second weights. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L relatively independent channel information is obtained to obtain measurement information with higher accuracy. 1 In L time units, it is transmitted through L first weights. And, the i-th first weight among the L first weights is obtained by the i-th second weight among L second weights and a third weight. The L second weights are orthogonal. In other words, the reference signals transmitted in L time units are transmitted through L mutually orthogonal second weights. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L relatively independent channel information is obtained to obtain measurement information with higher accuracy. 1 In L time units, it is transmitted through L first weights. And, the i-th first weight among the L first weights is obtained by the i-th second weight among L second weights and a third weight. The L second weights are orthogonal. In other words, the reference signals transmitted in L time units are transmitted through L mutually orthogonal second weights. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L relatively independent channel information is obtained to obtain measurement information with higher accuracy. 1 In L time units, it is transmitted through L first weights. And, the i-th first weight among the L first weights is obtained by the i-th second weight among L second weights and a third weight. The L second weights are orthogonal. In other words, the reference signals transmitted in L time units are transmitted through L mutually orthogonal second weights. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L relatively independent channel information is obtained to obtain measurement information with higher accuracy. 1 In L time units, it is transmitted through L first weights. And, the i-th first weight among the L first weights is obtained by the i-th second weight among L second weights and a third weight. The L second weights are orthogonal. In other words, the reference signals transmitted in L time units are transmitted through L mutually orthogonal second weights. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L relatively independent channel information is obtained to obtain measurement information with higher accuracy. 1 In L time units, it is transmitted through L first weights. And, the i-th first weight among the L first weights is obtained by the i-th second weight among L second weights and a third weight. The L second weights are orthogonal. In other words, the reference signals transmitted in L time units are transmitted through L mutually orthogonal second weights. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L relatively independent channel information is obtained to obtain measurement information with higher accuracy. 1 In L time units, it is transmitted through L first weights. And, the i-th first weight among the L first weights is obtained by the i-th second weight among L second weights and a third weight. The L second weights are orthogonal. In other words, the reference signals transmitted in L time units are transmitted through L mutually orthogonal second weights. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L relatively independent channel information is obtained to obtain measurement information with higher accuracy. 1 In L time units, it is transmitted through L first weights. And, the i-th first weight among the L first weights is obtained by the i-th second weight among L second weights and a third weight. The L second weights are orthogonal. In other words, the reference signals transmitted in L time units are transmitted through L mutually orthogonal second weights. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L relatively independent channel information is obtained to obtain measurement information with higher accuracy.

[0007] The second aspect of this application provides a communication method. This method is executed by a network device, or, this method is executed by some components in the network device (such as a processor, a chip, or a chip system, etc.), or this method can also be implemented by a logic module or software that can implement all or part of the functions of the network device. In the second aspect and its possible implementation manners, the case where this communication method is executed by the network device is described as an example. In this method, the network device transmits a reference signal; wherein, the reference signal is transmitted through L first weights in L time units respectively, L is an integer greater than 1; the i-th first weight among the L first weights is obtained by the i-th second weight among L second weights and a third weight, the L first weights are orthogonal, and the value range of i is from 1 to L; the network device receives measurement information, and this measurement information is obtained based on the reference signal. 1 In L time units, it is transmitted through L first weights. And, the i-th first weight among the L first weights is obtained by the i-th second weight among L second weights and a third weight. The L second weights are orthogonal. In other words, the reference signals transmitted in L time units are transmitted through L mutually orthogonal second weights. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L relatively independent channel information is obtained to obtain measurement information with higher accuracy. 1 In L time units, it is transmitted through L first weights. And, the i-th first weight among the L first weights is obtained by the i-th second weight among L second weights and a third weight. The L second weights are orthogonal. In other words, the reference signals transmitted in L time units are transmitted through L mutually orthogonal second weights. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L relatively independent channel information is obtained to obtain measurement information with higher accuracy. 1 In L time units, it is transmitted through L first weights. And, the i-th first weight among the L first weights is obtained by the i-th second weight among L second weights and a third weight. The L second weights are orthogonal. In other words, the reference signals transmitted in L time units are transmitted through L mutually orthogonal second weights. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L relatively independent channel information is obtained to obtain measurement information with higher accuracy. 1 In L time units, it is transmitted through L first weights. And, the i-th first weight among the L first weights is obtained by the i-th second weight among L second weights and a third weight. The L second weights are orthogonal. In other words, the reference signals transmitted in L time units are transmitted through L mutually orthogonal second weights. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L relatively independent channel information is obtained to obtain measurement information with higher accuracy. 1 In L time units, it is transmitted through L first weights. And, the i-th first weight among the L first weights is obtained by the i-th second weight among L second weights and a third weight. The L second weights are orthogonal. In other words, the reference signals transmitted in L time units are transmitted through L mutually orthogonal second weights. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L relatively independent channel information is obtained to obtain measurement information with higher accuracy. 1 In L time units, it is transmitted through L first weights. And, the i-th first weight among the L first weights is obtained by the i-th second weight among L second weights and a third weight. The L second weights are orthogonal. In other words, the reference signals transmitted in L time units are transmitted through L mutually orthogonal second weights. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L relatively independent channel information is obtained to obtain measurement information with higher accuracy. 1 In L time units, it is transmitted through L first weights. And, the i-th first weight among the L first weights is obtained by the i-th second weight among L second weights and a third weight. The L second weights are orthogonal. In other words, the reference signals transmitted in L time units are transmitted through L mutually orthogonal second weights. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L relatively independent channel information is obtained to obtain measurement information with higher accuracy.

[0008] Based on the above technical solution, after the network device transmits the reference signal, since the reference signal is transmitted through the wireless channel, the reference signal received by the terminal device can carry the channel information of the wireless channel; thereafter, the measurement information obtained by the terminal device by measuring the reference signal can reflect the channel information, and the subsequent manner of the terminal device transmitting the measurement information can enable the network device to obtain the measurement result of the channel between the network device and the terminal device based on this measurement information.

[0009] In addition, the reference signals received by the terminal device are respectively transmitted through a first weight on each time unit, and the i-th first weight among the first weights is obtained by the i-th second weight among the second weights and a third weight, and the second weights are orthogonal. In other words, the reference signals transmitted on each time unit are transmitted through the second weights that are orthogonal to each other. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L 1 relatively independent channel information is obtained to obtain measurement information with higher accuracy.

[0010] In this application, among the L 1 time units (or the L 2 time units mentioned later), each time unit can be one or more symbols, one or more mini-slots, one or more slots, one or more sub-frames, etc.

[0011] Optionally, the reference signals involved in this application may include synchronization signal / physical broadcast channel block (SSB, or S-SS / PSBCH block), channel state information reference signal (CSI-RS), etc.

[0012] Optionally, the L 1 time units are continuous in the time domain. Since the channel information of different time units that are continuous in the time domain is strongly correlated, in this way, it can be ensured that the different measurement results corresponding to the reference signals of the L 1 time units can reflect the same or similar channel information as much as possible to obtain measurement information with higher accuracy.

[0013] Optionally, at least two of the L 1 time units are discontinuous in the time domain.

[0014] It should be understood that the reference signals are respectively transmitted through L 1 first weights on the L 1 time units. It can be understood that the L 1 time units correspond one-to-one to the L 1 first weights. For example, the weight of the reference signal on the i-th time unit among the L 1 time units is the i-th first weight among the L 1 first weights.

[0015] Optionally, the reference signal on each time unit can be regarded as a reference signal, that is, the "reference signal carried on L 1 time units" can be regarded as L 1 reference signals. Correspondingly, the above method can be executed once or multiple times, that is, one or more L 1 time units are respectively used to implement the transceiver processes of one or more L 1 reference signals.

[0016] Alternatively, the reference signal on every L 1 time units can be regarded as a reference signal, that is, the "reference signal carried on L 1 time units" can be regarded as 1 reference signal. Correspondingly, the above method can be executed once or multiple times, that is, one or more L 1 time units are respectively used to implement the transceiver processes of one or more reference signals.

[0017] It should be understood that the L 1 second weights are orthogonal. It can be understood that any two of the L 1 second weights are mutually orthogonal, or different second weights among the L 1 second weights are pairwise orthogonal.

[0018] It should be understood that the L 1 second weights are orthogonal. The i-th first weight among the L 1 first weights is obtained by the i-th second weight among the L 1 second weights and the third weight. In other words, the L 1 first weights are obtained based on the L 1 second weights. Among them, different weights among the L 1 first weights can be orthogonal or non-orthogonal, which is not limited here.

[0019] It should be noted that the i-th first weight among the L 1 first weights is obtained by the i-th second weight among the L 1 second weights and the third weight, including: the i-th first weight among the L 1 first weights is obtained by multiplying the N 1 elements in the i-th second weight among the L 1 second weights with the N 1 sub-vectors in the third weight respectively.

[0020] In a possible implementation manner of the first aspect or the second aspect, the reference signal is sent through M digital ports, where M is a positive integer; among them, the first digital port among the M digital ports is at the L1 The weight corresponding to one time unit is the L 1 first weights; the first digital port includes N 1 virtual ports, and the second weights include N 1 elements corresponding to the N 1 virtual ports, and N 1 is an integer greater than or equal to 1.

[0021] Optionally, when M is greater than 1, the weights of the reference signals sent by the M digital ports can be the same (for example, all are the L 1 first weights), or the weights of the reference signals sent by the M digital ports can be different from each other (for example, the weight corresponding to the first digital port is the L 1 first weights, while the weights corresponding to other digital ports are different from the L 1 first weights), or the weights of the reference signals sent by the M digital ports can be partially the same (for example, the weight corresponding to the first digital port is the L 1 first weights, while the weights corresponding to some of the other digital ports are different from the L 1 first weights, and the weights corresponding to some other digital ports among the other digital ports are the same as the L 1 first weights).

[0022] It should be understood that the second weights include N 1 elements corresponding to the N 1 virtual ports. Among the L 1 second weights, the number of elements included in each second weight is N 1 . In other words, among the L 1 second weights, each second weight includes N 1 elements corresponding to the N 1 virtual ports. As described above, different second weights can be orthogonal to each other. Therefore, among the L 1 second weights, the N 1 elements included in different second weights are not completely the same.

[0023] In this application, the virtual port can be replaced by other terms, such as analog port, virtual subarray, analog subarray, subarray, etc.

[0024] Based on the above technical solution, the reference signal is respectively sent through L 1 first weights on L 1 time units. The L 1 first weights can be the weights of the first digital port among the M digital ports. Among them, the first digital port includes N 1virtual ports, and the second weight includes N 1 elements corresponding to the N 1 virtual ports, that is, the virtual ports included in the first digital port are orthogonal to the corresponding L 1 second weights on the L 1 time units. In this way, the weights of the virtual ports included in the same digital port on different time units are orthogonal.

[0025] Optionally, L 1 is an integer multiple of N 1 . For example, N 1 is equal to L 1 .

[0026] Optionally, the frequency domain resources occupied by the N 1 virtual ports on different time units of the L 1 time units are the same. In this way, the implementation complexity of transmitting and receiving the reference signal on different time units can be reduced as much as possible.

[0027] Optionally, the terminal device may also receive indication information indicating that the number of virtual ports included in the first digital port is N 1 , and / or, the terminal device may also receive indication information indicating that the number of time units of the reference signal is L 1 . Among them, these two indication information may be carried in the configuration information of the reference signal, or may be carried in other information / messages / signaling, which is not limited here.

[0028] Optionally, N 1 and L 1 are pre-configured information, which is not limited here.

[0029] It should be understood that a digital port includes one or more virtual ports (for example, the first digital port includes N 1 virtual ports, and the second digital port described later includes N 2 virtual ports, etc.), and it can be understood that the signal of the digital port is transmitted and received through the one or more virtual ports. For example, during signal transmission, the digital port transmits signals through the one or more virtual ports; for another example, during signal reception, the signals received by the one or more virtual ports can be understood as the signals received by the digital port.

[0030] In a possible implementation manner of the first aspect or the second aspect, the N 1 virtual ports respectively correspond to N 1 antenna element sets, each antenna element set includes one or more antenna elements, and the N 1 elements are respectively used to adjust the N1 The phase of a set of antenna elements.

[0031] Optionally, N 1 virtual ports refer to the virtual ports for transmitting reference signals (i.e., the virtual ports of the network device). Correspondingly, the N 1 virtual ports correspond to N 1 sets of antenna elements for transmitting reference signals (i.e., the sets of antenna elements of the network device).

[0032] Optionally, N 1 virtual ports respectively correspond to N 1 sets of antenna elements. It can be understood that the N 1 virtual ports and the N 1 sets of antenna elements are in one-to-one correspondence, or the i-th virtual port among the N 1 virtual ports corresponds to the i-th set of antenna elements among the N 1 sets of antenna elements. Similarly, N 1 elements are respectively used to adjust the phases of the N 1 sets of antenna elements. It can be understood that the N 1 elements and the N 1 sets of antenna elements are in one-to-one correspondence, or the i-th element among the N 1 elements is used to adjust the phase of the i-th set of antenna elements among the N 1 sets of antenna elements, where i ranges from 1 to N 1 .

[0033] Based on the above technical solution, the N 1 virtual ports included in the first digital port respectively correspond to N 1 sets of antenna elements, and the N 1 elements included in the second weight are respectively used to adjust the phases of the N 1 sets of antenna elements. Moreover, each set of antenna elements includes one or more antenna elements. In other words, the N 1 elements included in the second weight are used to adjust the phases of the antenna elements corresponding to different virtual ports in the digital port, that is, L 1 orthogonal second weights are used to achieve the orthogonality of the phases of the antenna elements corresponding to different virtual ports.

[0034] In a possible implementation manner of the first aspect or the second aspect, the third weight includes N 1 sub-vectors, and the dimension of the P-th sub-vector among the N 1 sub-vectors is the same as the number of antenna elements in the P-th set of antenna elements among the N 1 sets of antenna elements, where P ranges from 1 to N 1 .

[0035] Based on the above technical solution, the dimension of the P-th sub-vector among the N sub-vectors included in the third weight 1 is the same as the number of antenna elements in the P-th antenna element set among the N antenna element sets. In this way, the third weight can correspond to the weights of each antenna element set among the N antenna element sets respectively. 1 1

[0036] Optionally, the N elements included in the second weight are respectively used to adjust the phases of the N antenna element sets. Correspondingly, the third weight includes N sub-vectors which are also used to adjust the phases of the N antenna element sets, and the first weight is also used to adjust the phases of the N antenna element sets. In other words, the phases of the N antenna element sets can be determined based on the first weight determined by the N elements included in the second weight and the N sub-vectors included in the third weight. 1 1 1 1 1 1 1 1

[0037] Optionally, the third weight can be determined by other reference signals. For example, after the network device sends the other reference signal through different beams (or different weights), the terminal device can feed back multiple signal quality information based on the different beams. Correspondingly, the network device can determine the third weight based on the signal quality information with the best signal quality among the multiple signal quality information, or the network device can determine the third weight based on the signal quality information greater than a threshold among the multiple signal quality information, or the network device can determine the third weight based on the quality (such as RSRP) of one or more reference signals fed back by the terminal.

[0038] In a possible implementation manner of the first aspect or the second aspect, the dimension of the first weight is the same as that of the third weight.

[0039] Based on the above technical solution, the dimension of the first weight is the same as that of the third weight, that is, the first weight used to send the reference signal can determine the weights of each antenna element set among the N antenna element sets. 1

[0040] In a possible implementation manner of the first aspect, M takes the value of 1.

[0041] ​​​​​​​​​​​Based on the above technical solution, when M takes the value of 1, the reference signal can be sent through a digital port (i.e., the first digital port), so that the solution is applicable to the scenario where the network device is configured with a single digital port, and realizes the transmission and measurement of the reference signal of the virtual ports included in the single digital port.

[0042] In a possible implementation manner of the first aspect or the second aspect, M takes a value greater than 1, where the resources of the reference signal satisfy one of the following:

[0043] In the resources of the reference signal, the time-domain resources and frequency-domain resources for different digital ports among the M digital ports to send the reference signal are the same, and different digital ports among the M digital ports are code-division multiplexed;

[0044] In the resources of the reference signal, the time-domain resources for different digital ports among the M digital ports to send the reference signal are the same, and the frequency-domain resources for different digital ports among the M digital ports to send the reference signal are different (optionally, different digital ports among the M digital ports are not code-division multiplexed);

[0045] In the resources of the reference signal, the M digital ports belong to Q groups of digital ports, each group of digital ports includes one or more digital ports, and Q is a positive integer; among them, the frequency-domain resources for different groups of digital ports among the Q groups of digital ports to send the reference signal are different, the frequency-domain resources for the one or more digital ports included in the same group of digital ports among the Q groups of digital ports to send the reference signal are the same, and the one or more digital ports included in the same group of digital ports are code-division multiplexed (code division multiplexing, CDM). Optionally, the code-division multiplexing type of the one or more digital ports included in the same group of digital ports is frequency-domain code-division multiplexing.

[0046] It should be understood that the resources of the reference signal refer to the resources used to carry the reference signal, that is, the resources of the reference signal can be the resources for the network device to send the reference signal, or the resources of the reference signal can be the resources for the terminal device to receive the reference signal.

[0047] Based on the above technical solution, when M takes a value greater than 1, the reference signal can be sent through two or more digital ports (i.e., the first digital port and other digital ports), so that the solution is applicable to the scenario where the network device is configured with two or more digital ports, and realizes the transmission and measurement of the reference signal of the virtual ports included in the two or more digital ports. Moreover, the resources of the reference signal satisfy one of the above, so as to improve the flexibility of the solution implementation.

[0048] In a possible implementation of the first aspect or the second aspect, the method further includes: the terminal device receives indication information indicating that the resource of the reference signal meets one of the above items.

[0049] Optionally, the indication information is carried in the configuration information of the reference signal, or other messages / information / signaling, etc., which are not limited here.

[0050] Based on the above technical solution, the terminal device can also receive indication information indicating that the resource of the reference signal meets one of the above items, so that the terminal device can determine the resource configuration method of different digital ports among the M digital ports based on the indication information.

[0051] Optionally, the terminal device determines that the resource of the reference signal meets one of the above items through a pre-configuration method.

[0052] In a possible implementation of the first aspect or the second aspect, the second digital port among the M digital ports includes N 2 virtual ports; wherein, the reference signal is respectively transmitted through L 2 fourth weights on L 2 time units, and L 2 is an integer greater than 1; the j-th fourth weight among the L 2 fourth weights is obtained by the j-th fifth weight among the L 2 fifth weights and a sixth weight, and the L 2 fifth weights are orthogonal.

[0053] Optionally, among the M digital ports, when the weights for transmitting the reference signal in the first digital port and the second digital port are the same, the L 1 first weights and the L 2 fourth weights can be the same; when the weights for transmitting the reference signal in the first digital port and the second digital port are different, the L 1 first weights are different from the L 2 fourth weights.

[0054] Based on the above technical solution, the reference signal received by the terminal device is respectively transmitted through L 2 fourth weights on L 2 time units, and the j-th fourth weight among the L 2 fourth weights is obtained by the j-th fifth weight among the L 2 fifth weights and a sixth weight, and the L 2 fifth weights are orthogonal. In other words, the reference signal transmitted on the L 2 time units is transmitted through L 2sent by a fifth weight. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L 1 relatively independent channel information is obtained to obtain more accurate measurement information.

[0055] Optionally, L 1 is equal to L 2 . Among them, L 1 time units and L 2 time units can be the same time unit, that is, the time domain resources for the first digital port among the M digital ports to send the reference signal and the time domain resources for the second digital port to send the reference signal can be the same. In this way, the same time unit can be reused as much as possible to save communication resources and reduce implementation complexity.

[0056] Optionally, N 1 is equal to N 2 . That is, the number of virtual ports included in the first digital port among the M digital ports and the number of virtual ports included in the second digital port can be the same. In this way, the implementation complexity can be reduced.

[0057] It should be noted that the implementation process of the second digital port can refer to the implementation process of the first digital port in the previous text. For example, the correspondence between L 2 time units and L 2 fourth weights can refer to the correspondence between L 1 time units and L 1 first weights, and the correspondence between L 2 fourth weights and L 2 fifth weights can refer to the correspondence between L 1 first weights and L 1 second weights, etc.

[0058] In a possible implementation manner of the first aspect or the second aspect, in the resources of the reference signal, when the time domain resources and frequency domain resources for different digital ports among the M digital ports to send the reference signal are the same, and different digital ports are code division multiplexed, the resources for different digital ports among the M digital ports to send the reference signal all include the same M frequency domain units in the frequency domain.

[0059] Based on the above technical solution, when M>1, the time-domain resources and frequency-domain resources for transmitting the reference signal on different digital ports among the M digital ports are the same, and when different digital ports are code-division multiplexed, the resources for transmitting the reference signal on different digital ports all include the same M frequency-domain units in the frequency domain. In this way, it is possible to enable different digital ports to transmit reference signals in a code-division multiplexing manner on the same frequency-domain units, and the same frequency-domain units can be reused as much as possible to save communication resources and reduce implementation complexity.

[0060] Optionally, among the M frequency-domain units, each frequency-domain unit may include one or more subcarriers / resource elements (REs).

[0061] In a possible implementation manner of the first aspect or the second aspect, in the resources of the reference signal, the time-domain resources for transmitting the reference signal on different digital ports among the M digital ports are the same, the frequency-domain resources for transmitting the reference signal on different digital ports among the M digital ports are different, and when there is no code-division multiplexing (no CDM) among different digital ports among the M digital ports, the resources for transmitting the reference signal on different digital ports among the M digital ports include M different frequency-domain units that are not the same in the frequency domain.

[0062] Based on the above technical solution, when M>1, the frequency-domain resources for transmitting the reference signal on different digital ports among the M digital ports are different, and when there is no code-division multiplexing among different digital ports among the M digital ports, the resources for transmitting the reference signal on different digital ports include M different frequency-domain units that are not the same in the frequency domain. In this way, it is possible to enable different digital ports to transmit reference signals on different frequency-domain resources without code-division multiplexing, which can improve the flexibility of the scheme implementation.

[0063] Optionally, the method further includes: the terminal device receives indication information indicating the M different frequency-domain units, so that the terminal device can clarify the resource positions of each frequency-domain unit based on the indication information. Optionally, the indication information is carried in the configuration information of the reference signal, or other messages / information / signaling, etc., which is not limited here.

[0064] In a possible implementation manner of the first aspect or the second aspect, the measurement information includes first information obtained by measuring the reference signal transmitted based on the first digital port; wherein, the first information is determined based on N 1 channel information, and the N 1 channel information is respectively determined by the reference signals transmitted through the N 1 virtual ports, and the first information is used to determine the weights of the N 1 virtual ports in the first digital port.

[0065] Based on the above technical solution, among the measurement information obtained by the terminal device through measurement based on the reference signal, it may include the first information corresponding to the first digital port, and the first information is used to determine the weights of the N 1 virtual ports in the first digital port. Among them, the N 1 virtual ports have orthogonal L 1 second weights corresponding to L 1 time units. In this way, after the terminal device measures the reference signal carried by L 1 time units to obtain a measurement result, the terminal device can determine the optimal (or optimal) weights of the virtual ports in the first digital port based on the measurement result, and indicate the weights through the first information. Subsequently, the network device can communicate with the terminal device based on the weights. Thus, in the case of a large antenna array scale, the network device sends reference signals based on orthogonal second weights on different time units (generally, reference signals sent based on different weights can be understood as reference signals sent based on different beams). The terminal device can determine and indicate the optimal (or optimal) weights based on the measurement results of different time units, enabling the network device to communicate based on the weights, thereby reducing the beam scanning overhead and achieving fast beam tracking.

[0066] Optionally, after the terminal device measures the reference signal carried by L 1 time units to obtain a measurement result, the terminal device can determine the optimal (or optimal) weights of the virtual ports in the first digital port based on the measurement result and mathematical methods. For example, the mathematical methods may include power maximization criterion, capacity maximization criterion determination, etc.

[0067] In a possible implementation manner of the first aspect or the second aspect, the weights of the N 1 virtual ports in the first digital port are obtained through a first weight vector, and the first weight vector includes N 1 elements; among them, the N 1 virtual ports respectively correspond to N 1 antenna element sets, each antenna element set contains one or more antenna elements, and the N 1 elements are respectively used to adjust the phases of the N 1 antenna element sets.

[0068] In this application, terms such as weight vector, weight, weighted value, weighted vector, etc. can be replaced with each other. For example, the first weight vector can be replaced with "weight", such as the seventh weight. Another example is that the second weight vector described later can also be replaced with "weight", such as the eighth weight. Another example is that the "weight" in the first weight, the third weight, the fourth weight, and the sixth weight can also be replaced with analog weight.

[0069] Based on the above technical solution, the weight of the N 1 virtual ports in the first digital port is obtained through the first weight vector, and moreover, the weight of the N 1 virtual ports is obtained through the first weight vector including N 1 elements, and the N 1 elements are respectively used to adjust the phases of the N 1 antenna element sets. In other words, by adjusting the phases of the antenna elements, the transmission of reference signals can be achieved at different virtual ports.

[0070] In a possible implementation manner of the first aspect or the second aspect, the weight of the N 1 virtual ports in the first digital port is obtained through the first weight vector, including: the weight of the N 1 virtual ports is obtained through the first weight vector and the second weight vector, and the second weight vector includes N 1 sub-vectors; wherein, the dimension of the T-th sub-vector in the N 1 sub-vectors is the same as the number of antenna elements in the T-th antenna element set in the N 1 antenna element sets, and the value range of T is from 1 to N 1 .

[0071] Based on the above technical solution, the dimension of the T-th sub-vector in the N 1 sub-vectors included in the first weight vector is the same as the number of antenna elements in the T-th antenna element set in the N 1 antenna element sets. In this way, the first weight vector can respectively correspond to the weights of each antenna element set in the N 1 antenna element sets.

[0072] In a possible implementation manner of the first aspect or the second aspect, the first information satisfies any one of the following:

[0073] The first information includes the quantization processing result of the first weight vector;

[0074] The first information includes the N 1 corresponding to one of the N 1One of the elements, and, in addition to one of the virtual ports, the other N 1 -1 virtual ports corresponding to N 1 of the elements in the N 1 -1 quantization processing results corresponding to the difference between the elements and the one element;

[0075] The first information includes a first index and a second index, and the first index and the second index are used to determine the first weight vector of the first digital port among one or more weight vectors included in the codebook set; wherein, the first index is the codebook index in the first dimension, the second index is the codebook index in the second dimension, and among the one or more weight vectors included in the codebook set, each weight vector is determined by the weight in the first dimension and the weight in the second dimension;

[0076] The first information includes a third index, and the third index is used to determine the first weight vector of the first digital port among one or more weight vectors included in the codebook set.

[0077] Based on the above technical solution, the first information can be implemented in any of the above ways to improve the flexibility of the solution implementation.

[0078] In a possible implementation manner of the first aspect or the second aspect, the method further includes: the terminal device receives second information, and the second information is used to determine the codebook set.

[0079] Optionally, the codebook set is determined by the port information of the virtual ports in one or more digital ports, and the port information of the virtual ports in any digital port includes at least one of the following:

[0080] The number of virtual ports included in the digital port is N 1 ;

[0081] The number of virtual ports in the first dimension of the digital port is M 1 ;

[0082] The number of virtual ports in the second dimension of the digital port is M 2 ;

[0083] The oversampling factor in the first dimension of the digital port is O 1 ;

[0084] The oversampling factor in the second dimension of the digital port is O 2 。

[0085] Based on the above technical solution, when the first information includes an index (such as a first index, a second index, a third index, etc.), the terminal device can also receive second information, and determine a codebook set through the second information. Subsequently, the weights of the N 1 virtual ports in the first digital port can be determined based on the index indicated by the first information in the codebook set.

[0086] In a possible implementation manner of the first aspect or the second aspect, the second information satisfies at least one of the following;

[0087] The second information includes the port information of the virtual ports included in the first digital port;

[0088] The second information includes a fourth index, and the fourth index is used to determine the port information of the virtual ports included in the first digital port from one or more pre-configured or pre-defined port information of virtual ports;

[0089] The second information includes a fifth index, and the fifth index is used to determine the codebook set from one or more pre-configured or pre-defined codebook sets;

[0090] The second information is used to indicate some items in the port information of the virtual ports included in the first digital port, and the other items in the port information of the virtual ports included in the first digital port are determined through the partial items and one or more pre-configured port information of virtual ports;

[0091] The second information is used to indicate the port information of the virtual ports included in the first digital port, and the port information of the virtual ports is used to determine the codebook set from one or more pre-configured or pre-defined codebook sets.

[0092] Based on the above technical solution, the second information can be implemented through at least one of the above methods to improve the flexibility of the solution implementation.

[0093] In a possible implementation manner of the first aspect or the second aspect, the measurement information includes the M pieces of information and / or the K pieces of information; where the M pieces of information are respectively used to determine the first weight vector of each digital port in the M digital ports; one of the M pieces of information is the first information; the K pieces of information are respectively used to determine the first weight vector of the digital ports included in each digital port group in K groups of digital ports, where each group of digital ports in the K groups of digital ports includes one or more digital ports in the M digital ports, and K is a positive integer less than or equal to M; one of the K pieces of information is the first information.

[0094] Based on the above technical solution, the measurement information sent by the terminal device may include M pieces of information and / or K pieces of information. In this way, the network device can determine the first weight vector of each digital port among the M digital ports through the M pieces of information and / or the K pieces of information.

[0095] Optionally, the measurement information satisfies any one of the following:

[0096] When the rank number of the reference signal satisfies the first condition, the measurement information includes the M pieces of information;

[0097] When the rank number of the reference signal satisfies the second condition, the measurement information includes the K pieces of information;

[0098] When the channel quality indicator (CQI) of the reference signal satisfies the third condition, the measurement information includes the M pieces of information;

[0099] When the CQI of the reference signal satisfies the fourth condition, the measurement information includes the K pieces of information.

[0100] In a possible implementation manner of the first aspect or the second aspect, the method further includes: the terminal device receives indication information indicating that the measurement information includes the M pieces of information and / or the K pieces of information. In this way, it can be made clear to the terminal device and the network device the information content carried by the measurement information.

[0101] Optionally, the indication information is carried in the configuration information of the reference signal, or other messages / information / signaling, etc., which is not limited here.

[0102] In a possible implementation manner of the first aspect or the second aspect, among one or more digital ports included in each group of digital ports in the K groups of digital ports, the port information of the virtual ports of different digital ports is the same.

[0103] Based on the above technical solution, in the case where the measurement information includes K pieces of information, the K pieces of information are respectively used to determine the first weight vector of the digital ports included in each digital port group in the K groups of digital ports, where each group of digital ports in the K groups of digital ports includes one or more digital ports among the M digital ports. And, among one or more digital ports included in each group of digital ports in the K groups of digital ports, the port information of the virtual ports of different digital ports is the same. In this way, the feedback process of the measurement information can be simplified, and the implementation complexity can be reduced.

[0104] In a possible implementation of the first aspect or the second aspect, the measurement information is the measurement information corresponding to the first carrier, and the measurement information is used to determine the first weight vector of each of the M digital ports corresponding to the first carrier, where the first carrier includes one or more carriers;

[0105] Alternatively, the measurement information is the measurement information corresponding to the first bandwidth part (BWP), and the measurement information is used to determine the first weight vector of each of the M digital ports corresponding to the first BWP, where the first BWP includes one or more BWPs;

[0106] Alternatively, the measurement information is the measurement information corresponding to the first bandwidth, and the measurement information is used to determine the first weight vector of each of the M digital ports corresponding to the first bandwidth, where the first bandwidth includes one or more sub-bands.

[0107] Based on the above technical solution, the measurement information can be used to determine the first weight vector of each of the M digital ports corresponding to one or more carriers (or, one or more BWPs, or one or more sub-bands), so as to improve the flexibility of the solution implementation.

[0108] A third aspect of the present application provides a communication device. The device is a terminal device, or the device is a part of the components in the terminal device (such as a processor, a chip, or a chip system, etc.), or the device can also be a logic module or software that can implement all or part of the functions of the terminal device. In the third aspect and its possible implementations, the description is given by taking the communication device as the terminal device as an example.

[0109] The device includes a processing unit and a transceiver unit; the transceiver unit is used to receive a reference signal, and the reference signal is sent through M digital ports, where M is a positive integer; among them, the first digital port of the M digital ports includes N 1 virtual ports, and N 1 is an integer greater than or equal to 1; the processing unit is used to determine measurement information, and the transceiver unit is also used to send the measurement information, where the measurement information includes the first information obtained by measuring the reference signal sent through the first digital port; among them, the first information is determined based on N 1 channel information, and the N 1 channel information is respectively determined by the reference signals sent through the N 1 virtual ports, and the first information is used to determine the weights of the N 1 virtual ports in the first digital port.

[0110] In the third aspect of the present application, the component modules of the communication device can also be used to execute the steps performed in each possible implementation manner of the first aspect, and achieve the corresponding technical effects. For details, reference can be made to the first aspect, which will not be elaborated here.

[0111] In the fourth aspect of the present application, a communication device is provided. This device is a network device, or a part of the components in the network device (such as a processor, a chip, or a chip system, etc.), or the device can also be a logic module or software capable of implementing all or part of the functions of the network device. In the fourth aspect and its possible implementation manners, taking the case where the communication device is a network device for execution as an example for description.

[0112] The device includes a processing unit and a transceiver unit; the processing unit is used to determine a reference signal, and the transceiver unit is used to send the reference signal, and the reference signal is sent through M digital ports, where M is a positive integer; among them, the first digital port of the M digital ports includes N 1 virtual ports, and N 1 is an integer greater than or equal to 1; the transceiver unit is further used to receive measurement information, and the measurement information includes first information obtained by measuring based on the reference signal sent through the first digital port; among them, the first information is determined based on N 1 channel information, and the N 1 channel information is respectively determined by the reference signals sent through the N 1 virtual ports.

[0113] In the fourth aspect of the present application, the component modules of the communication device can also be used to execute the steps performed in each possible implementation manner of the second aspect, and achieve the corresponding technical effects. For details, reference can be made to the second aspect, which will not be elaborated here.

[0114] In the fifth aspect of the present application, a communication device is provided, including at least one processor, and the at least one processor is coupled to a memory; the memory is used to store programs or instructions; the at least one processor is used to execute the programs or instructions so that the device implements the method described in any one of the possible implementation manners in any one of the foregoing first aspect to the second aspect.

[0115] In the sixth aspect of the present application, a communication device is provided, including at least one logic circuit and an input-output interface; the logic circuit is used to execute the method described in any one of the possible implementation manners in any one of the foregoing first aspect to the second aspect.

[0116] In the seventh aspect of the present application, a communication system is provided, and the communication system includes the above-mentioned first communication device and the second communication device.

[0117] The eighth aspect of the present application provides a computer-readable storage medium for storing one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the method described in any one of the possible implementations of the first aspect to the second aspect as described above.

[0118] The ninth aspect of the present application provides a computer program product (or computer program). When the computer program in the computer program product is executed by the processor, the processor executes the method described in any one of the possible implementations of the first aspect to the second aspect as described above.

[0119] The tenth aspect of the present application provides a chip system. The chip system includes at least one processor for supporting a communication device to implement the method described in any one of the possible implementations of the first aspect to the second aspect as described above.

[0120] In a possible design, the chip system may further include a memory for storing necessary program instructions and data of the communication device. The chip system may be composed of chips or may include chips and other discrete devices. Optionally, the chip system further includes an interface circuit, and the interface circuit provides program instructions and / or data for the at least one processor.

[0121] Among them, the technical effects brought by any one of the design manners from the third aspect to the tenth aspect can be referred to the technical effects brought by different design manners from the first aspect to the second aspect as described above, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0122] Figure 1a It is a schematic diagram of a signal transmission manner related to the present application;

[0123] Figure 1b It is another schematic diagram of a signal transmission manner related to the present application;

[0124] Figure 1c It is another schematic diagram of a signal transmission manner related to the present application;

[0125] Figure 1d It is a schematic diagram of a signal transmission process related to the present application;

[0126] Figure 1e It is another schematic diagram of a signal transmission process related to the present application;

[0127] Figure 2 It is a schematic diagram of a communication system related to the present application;

[0128] Figure 3 It is a schematic diagram of a communication method provided by the present application;

[0129] Figure 4a A schematic diagram of reference signal transmission provided for this application;

[0130] Figure 4b Another schematic diagram of reference signal transmission provided for this application;

[0131] Figure 5 Another schematic diagram of reference signal transmission provided for this application;

[0132] Figure 6 Another schematic diagram of reference signal transmission provided for this application;

[0133] Figure 7 Another schematic diagram of reference signal transmission provided for this application;

[0134] Figure 8 Another schematic diagram of reference signal transmission provided for this application;

[0135] Figure 9 Another schematic diagram of reference signal transmission provided for this application;

[0136] Figure 10 A schematic diagram of a communication device provided for this application;

[0137] Figure 11 Another schematic diagram of a communication device provided for this application;

[0138] Figure 12 Another schematic diagram of a communication device provided for this application;

[0139] Figure 13 Another schematic diagram of a communication device provided for this application. Detailed implementation manners

[0140] First, some terms in the embodiments of this application are explained to facilitate understanding by those skilled in the art.

[0141] (1) Configuration and pre-configuration: In this application, both configuration and pre-configuration are used. Configuration means that network devices such as base stations or servers send the configuration information of some parameters or the values of the parameters to the terminal through messages or signaling, so that the terminal can determine the communication parameters or the resources during transmission according to these values or information. Pre-configuration is similar to configuration. It can be the way that network devices such as base stations or servers send parameter information or values to the terminal through communication links or carriers; it can also be the way that the corresponding parameters or parameter values are defined in the standard, or the relevant parameters or values are set in the terminal device in advance. This application does not make any limitations in this regard. Further, these values and parameters can be changed or updated.

[0142] (2) In this application, "for indicating" may include direct indication and indirect indication. When it is described that a certain indication information is for indicating A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0143] In this application, the information indicated by the indication information is called the information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated. For example, it can be achieved by direct indication, such as indicating through the information to be indicated itself or the index of the information to be indicated. It can also be achieved by indirectly indicating by indicating other information, where there is an association relationship between the other information and the information to be indicated. It can also only indicate a part of the information to be indicated, while the other parts of the information to be indicated are known or pre-agreed. For example, it can also rely on the arrangement order of each piece of information pre-agreed (such as protocol regulations) to achieve the indication of specific information, thereby reducing the indication overhead to a certain extent.

[0144] The information to be indicated can be sent as a whole, or can be divided into multiple sub-information and sent separately, and the sending periods and / or sending opportunities of these sub-information can be the same or different. The specific sending method is not limited in this application. Among them, the sending periods and / or sending opportunities of these sub-information can be pre-defined, such as pre-defined according to the protocol, or can be configured by the transmitting device by sending configuration information to the receiving device. Among them, the configuration information can, for example but not limited to, include one or a combination of at least two of radio resource control (RRC) signaling, media access control (MAC) layer signaling, and physical layer signaling. Among them, MAC layer signaling, for example, includes MAC control element (CE); physical layer signaling, for example, includes downlink control information (DCI).

[0145] (3) Reference signal (RS), also known as pilot signal. In a communication system, in order to transmit and receive data, obtain system synchronization, and feedback channel information, it is necessary to estimate the uplink channel or the downlink channel. Channel estimation refers to the process of reconstructing or restoring the received signal to compensate for signal distortion caused by channel fading and noise-generated fading. It uses the reference signals known to the transmitter and the receiver to track the time-domain and frequency-domain changes of the channel. The above-mentioned reference signals are also called reference signals, which are distributed on different resource elements (REs) in the time-frequency two-dimensional space within the orthogonal frequency division multiplexing (OFDM) symbol and have known amplitudes and phases.

[0146] In the physical layer, uplink communication may include the transmission of uplink physical channels and uplink signals. Among them, the uplink physical channels include the physical random access channel (PRACH), the physical uplink control channel (PUCCH), the physical uplink shared channel (PUSCH), etc., and the uplink signals include the sounding reference signal (SRS), the PUCCH de-modulation reference signal (PUCCH-DMRS), the PUSCH de-modulation reference signal (PUSCH-DMRS), the phase noise tracking reference signal (PTRS), the uplink positioning RS, etc.

[0147] At the physical layer, downlink communication may include the transmission of downlink physical channels and downlink signals. Among them, the downlink physical channels include the physical broadcast channel (PBCH), the physical downlink control channel (PDCCH), the physical downlink shared channel (PDSCH), etc., and the downlink signals include the primary synchronization signal (PSS) / secondary synchronization signal (SSS), the PDCCH de-modulation reference signal (PDCCH-DMRS), the PDSCH de-modulation reference signal (PDSCH-DMRS), the phase noise tracking signal PTRS, the channel status information reference signal (CSI-RS), the cell reference signal (CRS) (not available in NR), the time / frequency tracking reference signal (TRS) (not available in LTE), the LTE / NR positioning signal (positioning RS), etc.

[0148] (4) The terms "system" and "network" in the embodiments of the present application may be used interchangeably. "At least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, A and / or B may represent: the case where A exists alone, the case where A and B exist simultaneously, and the case where B exists alone, where A and B may be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one (item)" or a similar expression thereof refers to any combination of these items, including any combination of a single item (item) or multiple items (items). For example, "at least one of A, B, and C" includes A, B, C, AB, AC, BC, or ABC. Also, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects and are not used to limit the order, time sequence, priority, or importance of multiple objects.

[0149] (5) The "transmission" and "reception" in the embodiments of this application indicate the direction of signal transmission. For example, "transmitting information to device X" can be understood as the destination of this information being device X, which may include directly transmitting through the air interface, or other units or modules indirectly transmitting through the air interface. "Receiving information from device Y" can be understood as the source of this information being device Y, which may include directly receiving from device Y through the air interface, or indirectly receiving from device Y through the air interface from other units or modules. "Transmission" can also be understood as the "output" of the chip interface, and "reception" can also be understood as the "input" of the chip interface.

[0150] Exemplarily, taking the communication process between entity A and entity B as an example. In this application, when entity A transmits information to entity B, it can be that A directly transmits to B, or A transmits to B indirectly through other entities. Similarly, when entity B receives information from entity A, it can be that entity B directly receives the information transmitted by entity A, or entity B indirectly receives the information transmitted by entity A through other entities. Here, entity A and B can be radio access network (RAN) nodes or terminals, or modules within the RAN nodes or terminals. The transmission and reception of information can be the information interaction between the RAN node and the terminal. For example, the information interaction between the base station and the terminal; the transmission and reception of information can also be the information interaction between two RAN nodes. For example, the information interaction between the central unit (CU) and the distributed unit (DU); the transmission and reception of information can also be the information interaction between different modules within a device. For example, the information interaction between the terminal chip and other modules of the terminal, or the information interaction between the base station chip and other modules in the base station.

[0151] (6) Precoding technology: The transmitting end can, when the channel state is known, process the signal to be transmitted with the help of a precoding matrix that matches the channel and then transmit it, so that the precoded transmitted signal is adapted to the channel. Thus, compared with the process of the receiving end receiving the transmitted signal without precoding and eliminating the influence between channels, the complexity of the process of the receiving end receiving the precoded transmitted signal and eliminating the influence between channels is reduced. Therefore, through the precoding process of the signal to be transmitted, the quality of the received signal (such as the signal to interference plus noise ratio (SINR), etc.) is improved. By using precoding technology, it is also possible to achieve the transmission of the transmitting end and multiple receiving ends on the same time-frequency resource, that is, to achieve multiple user multiple input multiple output (MU-MIMO).

[0152] Optionally, the sending end may be a network device, and the receiving end may be a terminal device; or, the sending end may be a terminal device, and the receiving end may be a terminal device.

[0153] In one implementation, Multiple Input Multiple Output (MIMO) technology is used to increase system capacity and improve throughput. The mathematical expression is y=Hx+n, where y is the received signal, H is the channel information of the MIMO channel, x is the transmitted signal, and n is the noise. In a communication system with multiple antennas, the signals of multiple transmitting antennas will be superimposed on any receiving antenna. Therefore, the method of transmitting signals at the transmitting end affects the performance of the system, and it is often complicated to restore the transmitted signal at the receiving end. In this context, precoding is used to reduce system overhead and maximize the system capacity of MIMO on the one hand, and to reduce the complexity of the receiver to eliminate the impact between channels on the other hand. At this time, the mathematical expression is y=HPx+n, and P is the precoding matrix (or vector). In order to simplify the implementation complexity, P can be selected from a predefined set of matrices (or vectors), which is called a codebook. The method is also called a codebook-based transmission method. If the transmitter can obtain all the information of H, then P can be obtained by itself at the transmitter. This method is also called a non-codebook transmission method (NCB).

[0154] It should be understood that the relevant description of the precoding technology is only for ease of understanding and is not intended to limit the scope of protection of the embodiments of the present application. In the specific implementation process, the transmitting end can also perform precoding in other ways. For example, when channel information (such as but not limited to the channel matrix) cannot be obtained, a pre-set precoding matrix or a weighted processing method is used for precoding. For the sake of brevity, the specific content is not repeated herein.

[0155] (7) Precoding Matrix Indicator (PMI): can be used to indicate the precoding matrix. The precoding matrix can be, for example, a precoding matrix determined by the terminal device based on a channel matrix of a frequency domain unit. The channel matrix can be determined by the terminal device through channel estimation or based on channel reciprocity. However, it should be understood that the specific method for the terminal device to determine the precoding matrix is ​​not limited to the above description. The specific implementation method can be referred to in relevant literature. For the sake of brevity, it is not listed here one by one.

[0156] For example, the precoding matrix can be obtained by performing singular value decomposition (SVD) on the channel matrix or the covariance matrix of the channel matrix, or can also be obtained by performing eigenvalue decomposition (EVD) on the covariance matrix of the channel matrix. It should be understood that the methods for determining the precoding matrix listed above are only examples and should not impose any limitations on this application.

[0157] It should be noted that, for the method provided by the embodiments of this application, the network device can determine the channel state information (CSI) RS ports, frequency-domain discrete Fourier transform (DFT) vectors, and the combining coefficients of the spatial-frequency vectors for constructing the precoding vector based on the feedback of the terminal device, and then determine the precoding matrix corresponding to each frequency-domain unit. This precoding matrix can be directly used for downlink data transmission; or it can go through some beamforming methods, such as zero forcing (ZF), regularized zero-forcing (RZF), minimum mean-squared error (MMSE), signal-to-leakage-and-noise ratio maximization (SLNR), etc., to obtain the final precoding matrix for downlink data transmission. This application does not make any limitations in this regard. Unless otherwise specified, the precoding matrix involved hereinafter can generally refer to the precoding matrix determined based on the method provided by this application.

[0158] It can be understood that the precoding matrix determined by the terminal device can be regarded as the precoding matrix to be fed back. The terminal device can indicate the precoding matrix to be fed back through a precoding matrix indicator (PMI), so that the network device can recover this precoding matrix based on the PMI. It can be understood that the precoding matrix recovered by the network device based on the PMI can be the same as or similar to the above-mentioned precoding matrix to be fed back.

[0159] In downlink channel measurement, the higher the degree of approximation between the precoding matrix determined by the network device according to the PMI and the precoding matrix determined by the terminal device, the more adaptable the precoding matrix determined for data transmission is to the channel state, and thus the reception quality of the signal can be improved.

[0160] (8) Antenna port: It can be simply referred to as a port. It can be understood as the transmitting antenna recognized by the receiving end, or the transmitting antennas that can be distinguished in space. For each virtual antenna, an antenna port can be pre-configured. Each virtual antenna can be a weighted combination of multiple physical antennas. Each antenna port can correspond to a reference signal. Therefore, each antenna port can be called a port of a reference signal. For example, CSI-RS port, demodulation reference signal (DMRS), SRS port, etc.

[0161] Among them, the antenna port is a logical concept. Generally, there is no direct correspondence between an antenna port and a physical antenna. The antenna port is usually associated with a reference signal, and its meaning can be understood as a transceiver interface on the channel experienced by the reference signal. For low frequencies, an antenna port may correspond to one or more antenna elements, and these elements jointly transmit the reference signal. The receiving end can regard them as a whole without distinguishing these elements. For high-frequency systems, the antenna port may correspond to a beam. Similarly, the receiving end only needs to regard this beam as an interface without distinguishing each element.

[0162] In addition, a port group can refer to the set corresponding to multiple antenna ports. One way is to group multiple digital ports of a network device to form multiple port groups. In another way (especially in the hybrid digital-analog beam architecture), a port group can be multiple digital ports corresponding to the same analog beam, also simply referred to as a port group, or a digital-analog port group. Or, a port group can be a set of digital ports corresponding to multiple analog beams, also simply referred to as a port group, or a digital-analog port group. Or, multiple digital ports of the same analog beam are divided into multiple subsets, and each subset is called a port group, or a digital-analog port group.

[0163] (9) Channel State Information (CSI) report: In a wireless communication system, information reported by a receiving end (such as a terminal device) to a transmitting end (such as a network device) for describing the channel attributes of a communication link. The CSI report may include, for example, but not be limited to, Precoding Matrix Indicator (PMI), Rank Indicator (RI), Channel Quality Indicator (CQI), Channel State Information Reference Signal (CSI-RS), CSI-RS Resource Indicator (CRI), and Layer Indicator (LI), etc. It should be understood that the specific content of CSI listed above is only for illustrative purposes and should not constitute any limitation to this application. The CSI may include one or more of the above-listed items, or may include other information for characterizing CSI other than the above-listed ones, and this application does not make any limitation thereto.

[0164] (10) Beam. Among them, beams and beam pair links (BPLs) are introduced into the communication system. A beam is a communication resource. Beams can be divided into transmitting beams and receiving beams. The technology for forming a beam can be beamforming technology or other technical means. Beamforming includes transmitting beamforming and receiving beamforming.

[0165] Among them, a beam is a communication resource. A beam can be a wide beam, or a narrow beam, or other types of beams. The technology for forming a beam can be beamforming technology or other technical means. The beamforming technology can specifically be digital beamforming technology, analog beamforming technology, or hybrid digital / analog beamforming technology. Different beams can be considered different resources. The same information or different information can be sent through different beams. Optionally, multiple beams with the same or similar communication characteristics can be regarded as one beam. One beam can include one or more antenna ports for transmitting data channels, control channels, and sounding signals, etc. For example, a transmitting beam can refer to the distribution of signal strength formed in different directions in space after the signal is transmitted by the antenna, and a receiving beam can refer to the distribution of signal strength of the wireless signal received by the antenna in different directions in space. It can be understood that one or more antenna ports forming a beam can also be regarded as an antenna port set. The manifestation of a beam in the protocol can still be a spatial filter.

[0166] Transmitting beam: The transmitting end device sends a signal with a certain beamforming weight value, so that the transmitted signal forms a spatially directional beam. Among them, in the uplink direction, the transmitting end device can be a terminal; in the downlink direction, the transmitting end device can be a network device.

[0167] Receiving beam: The receiving-end device receives signals with certain beamforming weight values, so that the received signals form a spatially directional beam. Among them, in the uplink direction, the receiving-end device can be a network device; in the downlink direction, the receiving-end device can be a terminal.

[0168] Transmit beamforming: When a transmitting-end device with an antenna array transmits a signal, a specific amplitude and phase are set on each antenna element of the antenna array, so that the transmitted signal has a certain spatial directivity, that is, the signal power is high in some directions and low in some directions, and the direction with the highest signal power is the direction of the transmit beam. The antenna array includes multiple antenna elements, and the attached specific amplitude and phase are the beamforming weight values.

[0169] Receiving beamforming: When a receiving-end device with an antenna array receives a signal, a specific amplitude and phase are set on each antenna element of the antenna array, so that the power gain of the received signal is directional, that is, the power gain is high when receiving signals in some directions and low when receiving signals in some directions, and the direction with the highest power gain when receiving signals is the direction of the receiving beam. The antenna array includes multiple antenna elements, and the attached specific amplitude and phase are the beamforming weight values.

[0170] Optionally, sending a signal using a certain transmit beam can be understood as sending a signal using a certain beamforming weight value.

[0171] Optionally, receiving a signal using a receiving beam can be understood as receiving a signal using a certain beamforming weight value.

[0172] Generally, different beams can be considered as different resources. The same information or different information can be sent using (or through) different beams. A beam pair is based on the concept of a beam. A beam pair usually includes a transmit beam of a transmitting-end device and a receive beam of a receiving-end device.

[0173] Below, taking the network device as a base station as an example, combined with Figures 1a to 1c the implementation content shown, an exemplary description of the implementation process of the beam will be given. Generally, in a communication system with a relatively high frequency band, base stations (and terminals in some frequency bands) usually use large-scale array antennas (for example, from 500 to more than 1000 antenna elements), and use a relatively high array gain to counteract the path loss caused by the increase in the frequency band and improve the coverage ability. From the perspective of the implementation method of the base station, although they are all large arrays, different frequency bands and different array scales use different array weighting methods (that is, different beamforming methods). According to the implementation scheme of beamforming, they can be roughly divided into the following three categories.

[0174] One implementation method is digital beamforming (DBF), and its basic structure is as follows Figure 1a shown. Each individual or group of antenna elements is directly connected to a digital channel. This structure is a typical structure for large-scale multiple-input multiple-output (massive MIMO) in the low-frequency band. Since each antenna signal is directly converted to the digital domain and subsequent array weighting is performed in the digital domain, it is called digital beamforming. The digital domain signal processing has the highest degree of freedom and can support very complex signal processing methods. Therefore, under the same array scale, the performance of the DBF architecture is also the best. On the other hand, due to the high power consumption and cost of digital-to-analog converters (DACs) / analog-to-digital converters (ADCs) (especially under large bandwidth conditions). Generally, under the condition of the same array scale, the cost of DBF is also the highest.

[0175] Another implementation method is analog beamforming (ABF), and its structure is as follows Figure 1b shown. Each individual or group of antenna elements is connected to an analog phase shifter, and then multiple antenna elements are combined in the analog domain and passed through a digital-to-analog / analog-to-digital converter. Compared with DBF, the entire array of ABF only corresponds to one digital-to-analog / analog-to-digital converter. Therefore, the greatest advantage of the ABF architecture is its low cost and power consumption. The bottleneck of ABF is also obvious. The setting of the analog phase shifter in the analog domain determines the beam direction after beamforming. Since the signals are directly combined in the electrical signal in the analog domain and cannot use digital signal processing weighting like DBF, ABF needs to pre-configure the phase shifter settings during transmission and reception (i.e., direct the analog beam to the target terminal). This process needs to be completed through beam scanning during the link establishment phase, resulting in additional latency. Generally, once the analog beam is blocked or moved and misaligned, the link quality of the system will rapidly deteriorate or even terminate the connection. Therefore, the communication reliability of ABF is also inferior to that of DBF.

[0176] Another implementation method is hybrid beamforming (HBF), and its structure is as follows Figure 1c shown. It is an intermediate form between ABF and DBF. The figure shows an example of an HBF architecture with 3 channels, each channel corresponding to 2 analog phase shifters. On the one hand, HBF has a certain number of digital ports to support digital beamforming, and at the same time each digital port drives an ABF sub-array. Compared with ABF, under the same array scale, the scale of the analog sub-array driven by each digital channel is smaller ( Figure 1c 4 in Figure 1bAmong the 6 in (), the beam is wider, the reliability is better, and the beam scanning overhead is smaller. Generally, the ratio of HBF digital ports to analog phase shifters is configured inconsistently according to different frequencies and system design requirements. For example, in the high frequency band, the number of digital ports is very small (4 - 16), and the number of analog phase shifters corresponding to a single digital channel is relatively large (16 - 32), which is closer to ABF. While in the low frequency band system, the number of digital ports is relatively large (32 - 128), and the number of analog phase shifters for a single digital channel is less (for example, 2 - 10).

[0177] Generally, both the HBF and ABF architectures have analog beams. When the beam is aligned with the communication target, the signal quality will be improved. The direction of the analog beam (determined by the beam weights) needs to be configured before transmission and reception. For a certain terminal, the process of the base station selecting an analog beam is called beam training or beam scanning. Beam scanning usually involves the base station sending reference signals using different analog beam weights, and the terminal measures the reference signals respectively and feeds back its measurement results to assist the base station in determining which beam has the best quality.

[0178] (11) CSI-RS pilot mapping: The pilot pattern refers to the mapping method of pilot ports in time-frequency resources, including the arrangement methods of port time division and port frequency division, as well as the corresponding scrambling information. Among them, the configuration information of the pilot includes at least one of the following: configuration parameter index, number of ports, density (indicating that a group of pilots is mapped in every 1 / ρ RB), code division multiplexing type (CDM type), time-frequency information of the CDM group, CDM group index, frequency domain resource index information within the CDM group, frequency domain resource index information within the CDM group, time domain resource index information within the CDM group.

[0179] Optionally, the code division multiplexing types include:

[0180] noCDM (no code division multiplexing).

[0181] Frequency domain code division, denoted as -FD#, or fd-CDM#, where # is a number indicating that there are # ports in the CDM group that are code divided in the frequency domain.

[0182] Time domain code division, denoted as -TD#, or td-CDM#, where # is a number indicating that there are # ports in the CDM group that are code divided in the time domain.

[0183] The above CDM types can be combined. For example, cdm4-FD2-TD2 means that there are 4 ports in a CDM group, multiplexed in 2 frequency-division dimensions and 2 time-division dimensions. Taking the 8-port configuration with Row = 8 as an example, there are two CDM groups in this configuration (which can be seen from the CDM index of Row = 8), with 4 ports in each group (cdm4-FD2-TD2). The orthogonal codes of the 4 ports in the 'cdm4-FD2-TD2' CDM type defined in the protocol are shown in the four rows of information with index numbers 0 - 3 in Table 1 respectively.

[0184] Table 1

[0185]

[0186] w f represents frequency-domain CDM, w t represents time-domain CDM, with two groups of orthogonal codes. Among them, the frequency-domain codes of port 0 and port 1 are orthogonal, the time-domain codes of port 0 and port 2 are orthogonal, and the time-frequency codes of port 0 and port 3 are all orthogonal. 0 - 3 and 4 - 7 respectively belong to two CDM multiplexing groups (physical meaning: within the group, the same time-frequency resources are occupied, and ports are distinguished by CDM, and the resources between CDM groups are orthogonal).

[0187] (12) Codebook-based feedback. Since there is correlation between channels, it will cause interference between channels, resulting in a loss of capacity. Before data enters the wireless channel for transmission, the data on each antenna port is weighted (which can be understood as the digital beamforming mentioned above), which is equivalent to simplifying the channel matrix of the multi-antenna system, and eliminating the correlation between channels as much as possible, thereby improving the data transmission performance and capacity of the MIMO system.

[0188] As Figure 1d shown, the network device uses port 1 and port 2 to send reference signals to the terminal device. The terminal device can respectively estimate the channel information Hi,j (i, j = {1, 2}) between the transmitting ports 1, 2 and the receiving ports 1, 2 based on the received reference signals. According to this channel information, the terminal device can estimate the precoding matrix V at the transmitting end. The method of obtaining matrix V belongs to the algorithm implementation of the terminal device itself, and a classic implementation method is SVD decomposition. Assume that the received channel matrix at the receiving end is H, and this matrix can be decomposed by SVD as:

[0189]

[0190] where U and V are both unitary matrices, and D is a diagonal matrix. The terminal device can feedback matrix V (or the column vectors of V, depending on the number of streams to be transmitted) to the transmitting end as the precoding matrix, and the precoded received signal is:

[0191] y = HVx = UAV H Vx = UDx;

[0192] The terminal device can use the decomposed U matrix to process the received data and obtain:

[0193] U H y = U H UDx = Dx;

[0194] Since D is a diagonal matrix, the x signal can be directly recovered.

[0195] For the method by which the above network device obtains V, there are two cases:

[0196] Method 1: The network device estimates the downlink channel matrix H based on the measurement of the uplink SRS and the reciprocity of the uplink and downlink channels, and then obtains V. This method can be applied in a time division duplexing (TDD) system. Method 1 is also called SRS-based precoding.

[0197] Method 2: The terminal estimates the channel matrix H based on the measurement of the downlink reference signal, then obtains V, and then feeds back V to the network device side. Method 2 is also called PMI-based precoding.

[0198] For the second method, in order to reduce the feedback overhead, a protocol for finite quantization feedback of the precoding matrix V is defined. These finite optional precoding quantization value matrices are also called codebooks, and the precoding matrices in the codebook are numbered. The terminal can feed back the relevant numbers or parameters of these codebooks. Exemplarily, the implementation process will be described in three steps below.

[0199] The first step: The network device sends configuration information to the terminal device. The configuration information includes the number of horizontal and vertical ports and the DFT oversampling ratio. For example, the configuration information can include one or more of the CSI-RS port number, N1, N2, O1, and O2.

[0200] Among them, N1 represents the number of logical antenna ports in a certain direction of the same polarization, generally referring to the horizontal direction; N2 represents the number of logical antenna ports in another direction of the same polarization, generally referring to the vertical direction; O1 represents the DFT oversampling ratio in the direction where N1 is located (horizontal direction); O2 represents the DFT oversampling ratio in the direction where N2 is located (vertical direction).

[0201] The second step: The terminal device determines the codebook set.

[0202] Exemplarily, taking the case of 16 CSI-RS ports as an example, in this case, based on the configuration information or pre-configured information, the terminal device can determine that the value of N1 is 4 and the value of N2 is 2, or the value of N1 is 8 and the value of N2 is 1. Taking the value of N1 being 4 and the value of N2 being 2 as an example, the physical meanings of N1 and N2 are that when performing beamforming, a total of N1*N2 weight vectors can be formed with a horizontal dimension of N1 and a vertical dimension of N2, and these weight vectors are orthogonal to each other, that is, there is no interference between the beams formed by weighting with these weight vectors. The physical meanings of O1 and O2 are that the number of weight vectors is increased in the horizontal and vertical directions through DFT oversampling, so more weight vectors can be generated. The values of O1 and O2 also determine the beam density in the horizontal and vertical directions when the antenna pattern is fixed, that is, when N1 and N2 are determined. The larger the values of O1 and O2, the smaller the step size of the beam during beam scanning, and the higher the accuracy, but the cost is that the weight vectors are no longer orthogonal, that is, there is interference between the beams. N1*O1 determines the number of weight vectors in the horizontal direction in the beam set, and N2*O2 determines the number of weight vectors in the vertical direction in the beam set.

[0203] As Figure 1e shown in the example, N1 and N2 are (4, 2) respectively, and O1 and O2 are (4, 4) respectively. When no oversampling is performed, the DFT codebook set consists of the dark blue codebooks.

[0204] Specifically, the weight vectors in the horizontal and vertical directions are:

[0205]

[0206]

[0207] X1 is the weight vector in the horizontal direction, and the length of the vector is N1. The specific number of vectors is determined by the number of values of l, that is, l also represents which group of weights is selected in the horizontal direction.

[0208] X2 is the weight vector in the vertical direction, and the length of the vector is N2. The specific number of vectors is determined by the number of values of k, that is, k also represents which group of weights is selected in the vertical direction.

[0209] The codebook set W satisfies:

[0210]

[0211] Among them, represents the Kronecker Product. That is, the result represented by the Kronecker product of X1 and X2 may be the weight result on one group of polarized antennas, which is generally in a diagonal block form with the other group of polarized antennas.

[0212] Step 3: The terminal device measures the pilot signal (in this application, the pilot signal and the reference signal can be interchangeable) and feeds back the codebook. Exemplarily, the terminal measures the pilot signal and determines an optimal codebook feedback. For the determined l and m, the Kronecker product of X1 and X2 also determines a beam in a specific direction on the same polarized antenna. For codebook feedback, taking Type I Single-Panel Codebook as an example, the terminal device needs to feed back two parameters i 1 and i 2 , and i 1 Contains multiple parameters, the number of parameters is determined by the number of layers.

[0213]

[0214] i 2 : represents the polarization phase quantization index.

[0215] i 1，1 : Indicates the vertical beam index.

[0216] i 1，2 : represents the horizontal beam index.

[0217] i 1，3 : represents the selection of horizontal and vertical rotation factors, which is mainly related to the shape and number of ports of the antenna array.

[0218] See also Figure 2 , is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application. Figure 2 As shown, the communication system includes a radio access network (RAN) 100 and a core network 200. Optionally, the communication system 1000 may also include the Internet 300. The RAN 100 includes at least one RAN node (such as Figure 2 110a and 110b in the figure, collectively referred to as 110), and may also include at least one terminal (such as Figure 2 RAN 100 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment ( Figure 2(not shown in the figure). The terminal 120 is connected to the RAN node 110 wirelessly, and the RAN node 110 is connected to the core network 200 wirelessly or wiredly. The core network devices in the core network 200 and the RAN node 110 in the RAN 100 can be independent different physical devices, or the same physical device integrating the logical functions of the core network devices and the logical functions of the RAN nodes. Terminals can be connected to each other, and RAN nodes can be connected to each other, either wirelessly or wiredly.

[0219] The RAN 100 can be an evolved universal terrestrial radio access (E-UTRA) system, a new radio (NR) system, and a future radio access system defined in the 3rd generation partnership project (3GPP). The RAN 100 can also include two or more different radio access systems as described above. The RAN 100 can also be an open RAN (O-RAN).

[0220] The RAN node, also known as a radio access network device, a RAN entity, or an access node, is used to help terminals access the communication system wirelessly. In one application scenario, the RAN node can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in the 5th generation (5G) mobile communication system, a next generation NodeB in the 6th generation (6G) mobile communication system, or a base station in a future mobile communication system. The RAN node can be a macro base station (such as Figure 2 110a in the figure), a micro base station or an indoor station (such as Figure 2 110b in the figure), or a relay node or a donor node.

[0221] In another application scenario, the cooperation of multiple RAN nodes can be used to assist the terminal in achieving wireless access, and different RAN nodes respectively implement some functions of the base station. For example, the RAN node can be a central unit (CU), a distributed unit (DU), or a radio unit (RU). Here, the CU completes the functions of the radio resource control protocol and the packet data convergence protocol (PDCP) of the base station, and can also complete the function of the service data adaptation protocol (SDAP); the DU completes the functions of the radio link control layer and the medium access control (MAC) layer of the base station, and can also complete some or all of the functions of the physical layer. For the specific descriptions of the above protocol layers, reference can be made to the relevant technical specifications of 3GPP. The RU can be used to implement the functions of receiving and transmitting radio frequency signals. The CU and the DU can be two independent RAN nodes, or can be integrated in the same RAN node, for example, integrated in the baseband unit (BBU). The RU can be included in the radio frequency device, for example, included in the remote radio unit (RRU) or the active antenna unit (AAU). The CU can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0222] In different systems, the RAN nodes may have different names. For example, in the open RAN (O-RAN or ORAN) system, the CU can also be called O-CU (open CU), the DU can also be called O-DU, the CU-CP can also be called O-CU-CP, the CU-UP can also be called O-CU-UP, and the RU can also be called O-RU. For the convenience of description, in this application, the CU, CU-CP, CU-UP, DU, and RU are taken as examples for description. Any one of the CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0223] The communication between the access network device and the terminal device follows a certain protocol layer structure. The protocol layer may include a control plane protocol layer and a user plane protocol layer. The control plane protocol layer may include at least one of the following: radio resource control (RRC) layer, packet data convergence protocol (PDCP) layer, radio link control (RLC) layer, media access control (MAC) layer, or physical (PHY) layer, etc. The user plane protocol layer may include at least one of the following: service data adaptation protocol (SDAP) layer, PDCP layer, RLC layer, MAC layer, or physical layer, etc.

[0224] For the correspondence between the network elements in the ORAN system and their realizable protocol layer functions, reference can be made to Table 2 below.

[0225] Table 2

[0226] ORAN network element Protocol layer functions of 3GPP O-CU-CP RRC+PCDP - Control plane (PDCP-C) O-CU-UP SDAP+PCDP - User plane (PDCP-U) O-DU RLC+MAC+PHY-high O-RU PHY-low

[0227] For ease of description, in the following text, the base station is taken as an example of a RAN node for description.

[0228] A terminal is a device with wireless transceiver functions that can send signals to the base station or receive signals from the base station. A terminal can also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely applied in various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, remote medical treatment, smart grid, smart furniture, smart office, smart wearables, smart transportation, smart city, etc. A terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver functions, a wearable device, a vehicle, an airplane, a ship, a robot, a robotic arm, a smart home device, etc. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the terminal.

[0229] The base station and the terminal can be in fixed positions or movable. The base station and the terminal can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; and can also be deployed on aircraft, balloons, and artificial satellites. The embodiments of the present application do not limit the application scenarios of the base station and the terminal.

[0230] The roles of the base station and the terminal can be relative. For example, Figure 2 the helicopter or drone 120i in [the figure] can be configured as a mobile base station. For those terminals 120j that access the radio access network 100 through 120i, the terminal 120i is a base station; but for the base station 110a, 120i is a terminal, that is, the communication between 110a and 120i is through the radio air interface protocol. Of course, the communication between 110a and 120i can also be through the interface protocol between base stations. At this time, relative to 110a, 120i is also a base station. Therefore, both the base station and the terminal can be uniformly referred to as communication devices. Figure 2 the 110a and 110b in [the figure] can be referred to as communication devices with base station functions. Figure 2 the 120a - 120j in [the figure] can be referred to as communication devices with terminal functions.

[0231] The communication between the base station and the terminal, between the base station and the base station, and between the terminal and the terminal can be carried out through authorized spectrum, or through unlicensed spectrum, or through both authorized spectrum and unlicensed spectrum at the same time; it can communicate through the spectrum below 6 gigahertz (GHz), or through the spectrum above 6 GHz, or can also use the spectrum below 6 GHz and the spectrum above 6 GHz at the same time. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0232] In the embodiments of the present application, the functions of the base station can also be executed by modules (such as chips) in the base station, or can be executed by a control subsystem including base station functions. Here, the control subsystem including base station functions can be a control center in the above application scenarios such as smart grid, industrial control, intelligent transportation, and smart city. The functions of the terminal can also be executed by modules (such as chips or modems) in the terminal, or can be executed by a device including terminal functions.

[0233] In a wireless communication system (such as Figure 2In the communication system shown, as a key technology in wireless communication, MIMO technology can be used to meet the high-rate transmission requirements. In one implementation example, in order to send data to a terminal device, a network device can perform precoding on a digital port and select appropriate coding and modulation orders at the same time. For example, the role of precoding is to make the antenna (or beam) better match the channel, so as to ensure better signal quality and less interference when the transmitted data reaches the terminal side, and better modulation order and code rate can ensure maximizing the channel transmission capacity under the condition of reliable data transmission. The settings of precoding and modulation coding scheme (MCS) need to be determined according to the channel quality and channel response. In other words, the network device can achieve the transmission quality of data transmission based on the measurement results of channel measurement.

[0234] However, in the communication process based on MIMO technology, how to achieve channel measurement is a technical problem to be solved urgently.

[0235] To solve the above problems, this application provides a communication method and related devices. The following will be introduced in detail with reference to the drawings.

[0236] Please refer to Figure 3 , which is a schematic diagram of the communication method provided by this application. The method includes the following steps.

[0237] It should be noted that this application takes the network device and the terminal device as the execution subjects of the interaction schematic to illustrate the method provided by this application, but this application does not limit the execution subjects of the interaction schematic. For example, the method executed by the network device can also be executed by a module of the network device (such as a chip, a chip system, or a processor), and can also be implemented by a logical node, a logical module, or software that can implement all or part of the functions of the network device. The method executed by the terminal device can also be executed by a module of the terminal device (such as a chip, a chip system, or a processor), and can also be implemented by a logical node, a logical module, or software that can implement all or part of the functions of the terminal device.

[0238] Figure 3 The method shown includes steps S301 to S302, and each step will be introduced separately below.

[0239] S301. The network device sends a reference signal. Correspondingly, the terminal device receives the reference signal. Among them, the reference signal is sent through L 1 time units respectively by L 1 first weights, and L 1 is an integer greater than 1; the i-th first weight among the L 1 first weights is obtained by the i-th second weight among the L 1 second weights and a third weight. The L1 The second weights are orthogonal, where i ranges from 1 to L. 1 .

[0240] It should be understood that before step S301, the network device may send the configuration information of the reference signal. After that, the network device sends the reference signal based on the configuration information in step S301. Correspondingly, for the terminal device, the terminal device may receive the configuration information of the reference signal and receive the reference signal based on the configuration information in step S301. Generally, the configuration information may include the time-domain resource configuration information, frequency-domain resource configuration information, etc. of the reference signal.

[0241] It should be understood that after the terminal device receives the reference signal in step S301, the terminal device may perform measurements on the received reference signal to obtain measurement information and then execute step S302.

[0242] S302. The terminal device sends the measurement information. Correspondingly, the network device receives the measurement information. The measurement information is obtained by measuring based on the reference signal.

[0243] In this application, within L 1 time units (or the L 2 time units mentioned later), each time unit may be one or more symbols, one or more mini-slots, one or more time slots, one or more sub-frames, etc.

[0244] Optionally, in step S301, the L 1 time units used to send the reference signal are continuous in the time domain. Since the channel information of different time units that are continuous in the time domain has a strong correlation, in this way, it can be ensured that different measurement results corresponding to the reference signals of the L 1 time units can reflect the same or similar channel information as much as possible, so as to obtain more accurate measurement information.

[0245] Optionally, in step S301, at least two of the L 1 time units used to send the reference signal are discontinuous in the time domain.

[0246] It should be understood that in step S301, the reference signal is sent through L 1 first weights on L 1 time units respectively. It can be understood that the L 1 time units correspond one-to-one to the L 1 first weights. For example, the weight of the reference signal in the i-th time unit among the L 1 time units is L 1The i-th first weight among the L first weights, where i ranges from 1 to L 1 .

[0247] Optionally, the reference signal on each time unit can be regarded as one reference signal, that is, the "reference signal carried on L 1 time units" can be regarded as L 1 reference signals. Correspondingly, the above method can be executed once or multiple times, that is, the transceiver processes of one or more L 1 time units respectively implement the transceiver processes of one or more L 1 reference signals.

[0248] Alternatively, the reference signal on every L 1 time units can be regarded as one reference signal, that is, the "reference signal carried on L 1 time units" can be regarded as 1 reference signal. Correspondingly, the above method can be executed once or multiple times, that is, the transceiver processes of one or more L 1 time units respectively implement the transceiver processes of one or more reference signals.

[0249] It should be understood that the L 1 second weights are orthogonal, and the i-th first weight among the L 1 first weights is obtained by the i-th second weight among the L 1 second weights and the third weight. In other words, the L 1 first weights are obtained based on the L 1 second weights. Among them, the different weights among the L 1 first weights can be orthogonal or non-orthogonal, which is not limited here.

[0250] It should be noted that the i-th first weight among the L 1 first weights is obtained by the i-th second weight among the L 1 second weights and the third weight, including: the i-th first weight among the L 1 first weights is the product of the N 1 elements in the i-th second weight among the L 1 second weights and the N 1 sub-vectors in the third weight respectively.

[0251] Optionally, the multiplication of the N 1 elements in the i-th second weight and the N 1 sub-vectors in the third weight can be the product of one element and one sub-vector. For example, the N 1 elements are respectively a 0 , a 1 (i.e., N1 In the case of = 2), if f 0 , f 1 are two row vectors, then the obtained second weight is [a 0 f 0 , a 1 f 1 ; if f 0 , f 1 are two column vectors, then the obtained second weight is

[0252] Optionally, the N 1 th element in the i-th second weight is multiplied by the N 1 sub-vectors in the third weight, and can form a diagonal matrix for the N 1 sub-vectors, and then perform matrix multiplication with the vector composed of the N 1 elements. Taking N 1 as 2 for example, the N 1 sub-vectors included in the third weight are respectively f 0 , f 1 , when f 0 , f 1 are two row vectors, and the N 1 elements included in the second weight are respectively a 0 , a 1 , satisfying:

[0253]

[0254] When f 0 , f 1 are two row vectors, and the N 1 elements included in the second weight are respectively a 0 , a 1 , satisfying:

[0255]

[0256] In a possible implementation manner, in step S301, the reference signal sent by the network device is sent through M digital ports, where M is a positive integer; among them, the weight of the first digital port corresponding to the L 1 time units is the L 1 first weights; the first digital port includes N 1 virtual ports, and the second weight includes N 1 elements corresponding to the N 1 virtual ports, and N 1 is an integer greater than or equal to 1. Specifically, the reference signal is respectively sent through L 1 time units by L 1sent by a first weight, the L 1 The first weight can be the weight of the first digital port among the M digital ports. Among them, the first digital port includes N 1 virtual ports, and the second weight includes N 1 elements corresponding to the N 1 virtual ports, that is, the virtual ports included in the first digital port are orthogonal to the corresponding L 1 second weights on L 1 time units. In this way, the weights of the virtual ports included in the same digital port on different time units are orthogonal.

[0257] In this application, the virtual port can be replaced by other terms, such as analog port, virtual subarray, analog subarray, subarray, etc.

[0258] Optionally, L 1 is an integer multiple of N 1 For example, N 1 is equal to L 1

[0259] Optionally, the N 1 virtual ports occupy the same frequency domain resources on different time units among the L 1 time units. In this way, the implementation complexity of the transceiver of the reference signal on different time units can be reduced as much as possible.

[0260] Optionally, the terminal device can also receive indication information indicating that the number of virtual ports included in the first digital port is N 1 , and / or, the terminal device can also receive indication information indicating that the number of time units of the reference signal is L 1 . Among them, these two indication information can be carried in the configuration information of the reference signal, or can be carried in other information / messages / signals, which is not limited here.

[0261] Optionally, N 1 and L 1 are pre-configured information, which is not limited here.

[0262] It should be understood that a digital port includes one or more virtual ports (for example, the first digital port includes N 1 virtual ports, and the second digital port described later includes N 2 virtual ports, etc.), and it can be understood that the signal of the digital port is transmitted and received through the one or more virtual ports. For example, during signal transmission, the digital port transmits signals through the one or more virtual ports; for another example, during signal reception, the signals received by the one or more virtual ports can be understood as the signals received by the digital port.​

[0263] As can be seen from the description of step S301 above, the reference signal is transmitted through L 1 first weights on L 1 time units respectively, and the L 1 first weights are determined by the second weight and the third weight. The implementation processes of the second weight and the third weight will be described exemplarily below.

[0264] In a possible implementation manner, the second weight includes N 1 elements corresponding to the N 1 virtual ports. Among them, the N 1 virtual ports included in the first digital port of the M digital ports respectively correspond to N 1 antenna element sets, each antenna element set includes one or more antenna elements, and the N 1 elements are respectively used to adjust the phases of the N 1 antenna element sets. Specifically, the N 1 virtual ports included in the first digital port respectively correspond to N 1 antenna element sets, and the N 1 elements included in the second weight are respectively used to adjust the phases of the N 1 antenna element sets. And each antenna element set includes one or more antenna elements. In other words, the N 1 elements included in the second weight are used to adjust the phases of the antenna elements corresponding to different virtual ports in the digital port, that is, L 1 orthogonal second weights are used to implement the orthogonality of the phases of the antenna element sets corresponding to different virtual ports.

[0265] In a possible implementation manner, the third weight includes N 1 sub-vectors, and the dimension of the Pth sub-vector in the N 1 sub-vectors is the same as the number of antenna elements in the Pth antenna element set in the N 1 antenna element sets, where P ranges from 1 to N 1 . Specifically, the dimension of the Pth sub-vector included in the third weight is the same as the number of antenna elements in the Pth antenna element set in the N 1 antenna element sets. In this way, the third weight can respectively correspond to the weights of each antenna element set in the N 1 antenna element sets. 1 antenna element sets.

[0266] In a possible implementation, the third weight is determined by the network device based on the beam measurement results (e.g., reference signal received power, RSRP) fed back by the terminal device. When the network device sends a reference signal for beam management, different analog weights are used for weighting. After the terminal makes measurements, it feeds back the corresponding measurement results. The third weight can be the transmission analog weight corresponding to the reference signal with the maximum RSRP in the feedback results, or it can be the transmission analog weight corresponding to a certain reference signal in the feedback results. Exemplarily, the third weight can be determined through other reference signals. For example, after the network device sends the other reference signal through different beams (or different weights), the terminal device can feed back multiple signal quality information based on the different beams. Correspondingly, the network device can determine the third weight based on the signal quality information with the best signal quality among the multiple signal quality information, or the network device can determine the third weight based on the signal quality information greater than a threshold among the multiple signal quality information, or the network device can determine the third weight based on the quality (e.g., RSRP) of one or more reference signals fed back by the terminal.

[0267] Optionally, the first weight and the third weight have the same dimension, that is, the first weight used for sending the reference signal can determine the weights of each antenna element set in N 1 antenna element sets.

[0268] Exemplarily, taking the N 1 virtual ports included in the first digital port as an example. At the k-th time unit among L 1 (L 1 =N 1 ) time units, the k-th second weight w′ 1 of the L k second weights can be expressed as:

[0269] w′ k =[w 1，k w 2，k … w N，k ′;

[0270] where w′ k is an N 1 ×1 vector, corresponding to the phase information of the N 1 virtual sub-arrays at the k-th time unit. As described above, the reference signal sent by the first digital port can be carried on L 1 (L 1 =N 1 ) time units. Then the L 1 time units corresponding to the N 1 second weights can be expressed as:

[0271]

[0272] Among them, respectively represent L 1 L on L time units 1 (L 1 = N 1 ) second weights, and L 1 (L 1 = N 1 ) second weights are orthogonal to each other.

[0273] Exemplarily, the matrix W can be a DFT matrix or a Hadamard matrix. For example, the columns of the matrix W represent different time units (i.e., the matrix W includes L 1 columns), and the rows represent different virtual ports included in a digital port (i.e., the matrix W includes N 1 rows). Taking the DFT matrix as an example, the matrix W satisfies:

[0274]

[0275] Among them, each element w in the matrix W x，y represents the phase information of the virtual sub-array y at symbol x (i.e., x is the matrix column index and y is the matrix row index), where e is the natural constant, j is the imaginary symbol, and N 1 is the number of virtual ports.

[0276] Of course, it can also be a Hadamard matrix. For example, the first-order Hadamard matrix can be expressed as H 1 = [1].

[0277] The second-order Hadamard matrix can be expressed as

[0278] The fourth-order Hadamard matrix can be expressed as

[0279] The n-order Hadamard matrix is n is the z-th power of 2, and z is a positive integer.

[0280] For example, Figure 4a , as an application example, assume that the first digital port is split into 2 virtual ports, that is, the first digital port includes 2 (i.e., N 1 = 2) virtual ports, then 2 (i.e., L 1 = N 1If it is sent on 2 (i.e., L = 2) time units, then the second weights of the two virtual ports on these 2 time units are [+1 +1] and [+1 -1] respectively. As follows Figure 5 shown:

[0281] In time domain unit 1, the second weights of the 2 virtual ports are +1 and +1 respectively.

[0282] In time domain unit 2, the second weights of the 2 virtual ports are +1 and -1 respectively.

[0283] As Figure 4b , as another application example, assume that the first digital port is split into 4 virtual ports, that is, the first digital port includes 4 (i.e., N 1 = 4) virtual ports, then it needs to be sent on 4 (i.e., L 1 = N 1 = 4) time units. Then the second weights of the 4 virtual ports on these 4 time units can be [+1 +1 +1 +1], [+1 -1 +1 -1], [+1 +1 -1 -1], [+1 -1 -1 +1] respectively; they can also be [+1 +1 +1 +1], [+1 -j +1 +j], [-1 +1 -1 +1], [+1 -j -1 +j] respectively.

[0284] Taking the Hadamard matrix as an example,

[0285] In time domain unit 1, the second weights of the 4 virtual ports are +1, +1, +1, and +1 respectively.

[0286] In time domain unit 2, the second weights of the 4 virtual ports are +1, -1, +1, and -1 respectively.

[0287] In time domain unit 3, the second weights of the 4 virtual ports are +1, +1, -1, and -1 respectively.

[0288] In time domain unit 4, the second weights of the 4 virtual ports are +1, -1, -1, and +1 respectively.

[0289] It should be understood that the L 1 second weights are orthogonal. It can be understood that any two of the L 1 second weights are orthogonal to each other, or different second weights among the L 1 second weights are pairwise orthogonal. For example, in the above Figure 4a , the L 1 second weights include the second weights "+1, +1" on time domain unit 1 and the second weights "+1, -1" on time domain unit 2, and these 2 (i.e., L 1The second weights of L (L = 2) are orthogonal to each other. For another example, in the above Hadamard matrix, the L 1 second weights include the second weight of “+1, +1, +1, +1” on time domain unit 1, the second weight of “+1, -1, +1, -1” on time domain unit 2, the second weight of “+1, +1, -1, -1” on time domain unit 3, and the second weight of “+1, -1, -1, +1” on time domain unit 4. And these 4 (i.e., L 1 = 4) second weights are orthogonal to each other in pairs.

[0290] Optionally, if M is greater than 1, the phase information of each virtual port included in each digital port among the M digital ports can be configured independently, or the phase information of the virtual sub-arrays with the same configuration among the M digital ports can be configured.

[0291] Based on Figure 3 the technical solution shown, after the network device sends the reference signal in step S301, since the reference signal is transmitted through the wireless channel, the reference signal received by the terminal device can carry the channel information of the wireless channel; thereafter, the measurement information obtained by the terminal device measuring the reference signal can reflect the channel information, and the subsequent manner in which the terminal device sends the measurement information in step S302 can enable the network device to obtain the measurement result of the channel between the network device and the terminal device based on the measurement information.

[0292] In addition, the reference signal received by the terminal device in step S301 is respectively sent through L 1 first weights on L 1 time units, and the i-th first weight among the L 1 first weights is obtained by the i-th second weight among the L 1 second weights and the third weight. The L 1 second weights are orthogonal. In other words, the reference signal transmitted on the L 1 time units is sent through the mutually orthogonal L 1 second weights. In this way, the measurement of the reference signals carried on different time units by the terminal device is relatively independent, and then L 1 relatively independent channel information is obtained to obtain measurement information with higher accuracy.

[0293] It can be seen from the above implementation process that in step S301, the reference signal can be sent through M digital ports, and M can have multiple value-taking methods, which will be introduced below in combination with some implementation examples.

[0294] Example 1, M takes the value of 1.

[0295] In Example 1, when M takes the value of 1, the reference signal can be transmitted through a digital port (i.e., the first digital port), so that the solution is applicable to the scenario where the network device is configured with a single digital port, and the transmission and measurement of the reference signal of the virtual ports included in the single digital port are realized.

[0296] As described above, when M takes the value of 1, the M digital ports are the first digital port. And the first digital port includes N 1 virtual ports, and the reference signal transmitted by the first digital port is respectively transmitted through L 1 time units by L 1 first weights. For example, N 1 is equal to L 1

[0297] Optionally, the L 1 time units are continuous in the time domain.

[0298] Optionally, when the L 1 time units are L 1 symbols, the specific time domain symbol positions occupied by the L 1 symbols in a time slot can be configured by the network device (such as the configuration information of the reference signal described above), for example, configuring the starting position of the L 1 symbols, configuring the value of L 1 and so on.

[0299] Optionally, on the L 1 time units, the number of frequency domain resources occupied on different time units can be the same.

[0300] As an implementation example of Example 1, as Figure 5 shown, taking the first digital port including 2 (i.e., N 1 = 2) virtual ports as an example, the resources for transmitting the reference signal through the first digital port can include Figure 5 2 REs in 1 . In other words, the 2 REs include 2 (i.e., L Figure 5 = 2) symbols in the time domain and include one subcarrier in the frequency domain. In the example shown in Figure 5 , the reference signal is transmitted through the first digital port on 2 symbols. It should be understood that

[0301] the code sequence encodings on the first symbol and the second symbol in Figure 6 can both be "+1", and are transmitted through the all-1 code sequence encoding, that is, there is no code division multiplexing of the digital ports. 1 ​Taking (M = 4) virtual ports as an example, the resources for transmitting the reference signal through the first digital port may include Figure 6 4 REs in Figure 6 . In other words, the 4 REs include 4 (i.e., L 1 = 4) symbols in the time domain and include one subcarrier in the frequency domain. In Figure 6 the example shown, the reference signal is transmitted through the first digital port on 4 symbols. It should be understood that in Figure 6 , the code sequence encoding on different symbols among the 4 symbols can all be “+1” and is transmitted through the code sequence encoding of all 1s, that is, there is no code division multiplexing of digital ports.

[0302] Optionally, multiple time units for transmitting the reference signal through the first digital port may be located in the same time slot. For example Figure 5 2 symbols in Figure 5 and Figure 5 4 symbols in Figure 5 may be located in the same time slot. Similarly, multiple resources for transmitting the reference signal through the first digital port may be located in the same physical resource block (PRB). For example Figure 5 2 REs in Figure 5 and Figure 5 4 REs in Figure 5 may be located in the same PRB. In addition, for the reference signal transmitted in step S201, the reference signal may be carried on one or more time slots (or one or more PRBs), and the resource mapping methods for different time slots (or different PRBs) may be the same.

[0303] Optionally, multiple time units for transmitting the reference signal through the first digital port, and / or, multiple resources for transmitting the reference signal through the first digital port, may be sent through the configuration information of the network device. For example, it may be configured through the configuration of the reference signal sent by the network device.

[0304] Example 2, M is greater than 1.

[0305] In Example 2, when M is greater than 1, the reference signal may be transmitted through two or more digital ports (i.e., the first digital port and other digital ports), so that the solution is applicable to the scenario where the network device is configured with two or more digital ports, and realizes the transmission and measurement of the reference signal of the virtual ports included in the two or more digital ports.

[0306] In Example 2, in addition to including the first digital port, the M digital ports may also include other digital ports, such as the second digital port. Among them, the second digital port includes N 2 virtual ports; among them, the reference signal is respectively transmitted through L 2 time units through L 2sent by the L-th fourth weight 2 is an integer greater than 1; the L 2 -th fourth weight among the L fourth weights is obtained by the j-th fifth weight among the L fifth weights and the sixth weight, and the L 2 fifth weights are orthogonal. In other words, the reference signals transmitted in the L 2 time units are transmitted by the mutually orthogonal L 2 fifth weights. In this way, the measurements of the reference signals carried on different time units by the terminal device are relatively independent, and then L 2 relatively independent channel information is obtained to obtain measurement information with higher accuracy. 1

[0307] Optionally, L 1 is equal to L 2 . Among them, the L 1 time units and the L 2 time units can be the same time units, that is, the time domain resources for transmitting the reference signal by the first digital port among the M digital ports and the time domain resources for transmitting the reference signal by the second digital port can be the same. In this way, the same time units can be reused as much as possible to save communication resources and reduce the implementation complexity.

[0308] Optionally, L 1 is equal to L 2 . Among them, the L 1 time units and the L 2 time units can be the same frequency domain units, that is, the frequency domain resources for transmitting the reference signal by the first digital port among the M digital ports and the frequency domain resources for transmitting the reference signal by the second digital port can be the same. In this way, the same frequency domain units can be reused as much as possible to save communication resources and reduce the implementation complexity.

[0309] Optionally, N 1 is equal to N 2 . That is, the number of virtual ports included in the first digital port among the M digital ports and the number of virtual ports included in the second digital port can be the same. In this way, the implementation complexity can be reduced.

[0310] It should be noted that the implementation process of the second digital port can refer to the implementation process of the first digital port in the previous text. For example, the correspondence between the L 2 time units and the L 2 fourth weights can refer to the correspondence between the L 1 time units and the L 1 first weights, and the correspondence between the L 2 fourth weights and the L 2 ​The correspondence between the fifth weights can refer to L 1 The correspondence between the first weights and L 1 The correspondence between the second weights, etc.

[0311] In addition, in the second example, when M is greater than 1, there are multiple implementation methods for the resources of the reference signal. For example, the resources of the reference signal satisfy one of the following Method 1 to Method 3, and these methods will be described exemplarily below.

[0312] Method 1: In the resources of the reference signal, the time-domain resources and frequency-domain resources for transmitting the reference signal by different digital ports among the M digital ports are the same, and different digital ports among the M digital ports are code-division multiplexed, and the digital ports are distinguished by orthogonal codes. In other words, in Method 1, the M digital ports can share time-frequency resources, and the M digital ports use frequency-domain code division (i.e., FD-CDM#M), and it can be expressed that there are M digital ports in one CDM group.

[0313] Optionally, for any one of the M digital ports, the number of virtual ports included in the any one digital port and the number of time units occupied by the any one digital port can be equal (for example, L 1 and N 1 are equal, L 2 and N 2 are equal).

[0314] As an implementation example of Method 1, as Figure 7 shown, taking the first digital port and the second digital port both including 4 (i.e., N 1 =N 2 =4) virtual ports as an example, the resources for transmitting the reference signal through the first digital port can include Figure 7 the 8 REs corresponding to "Digital Port 0" in Figure 7 , and the resources for transmitting the reference signal through the second digital port can include Figure 7 the 8 REs corresponding to "Digital Port 1" in Figure 7 . In other words, the 8 REs include 4 (i.e., L 1 =4) symbols in the time domain and two subcarriers in the frequency domain. In the example shown in Figure 7 , for the 4 symbols, the orthogonal cover code (OCC) codes encoded by the code sequences corresponding to Digital Port 0 are "+1" and "-1", and the OCC codes encoded by the code sequences corresponding to Digital Port 1 are "+1" and "+1". That is, through 2 OCCs, two digital ports are corresponding. Since it is the orthogonal OCC code of 2 REs in the frequency domain, this code-division multiplexing is called FD-CDM2.

[0315] It can be understood that the implementation process of orthogonal codes between different digital ports can refer to the description of Table 1 and related implementation examples in the previous text.

[0316] Method 2: In the resources of the reference signal, the time-domain resources for different digital ports among the M digital ports to send the reference signal are the same, the frequency-domain resources for different digital ports among the M digital ports to send the reference signal are different, and there is no code division multiplexing (no-CDM) among different digital ports among the M digital ports. In other words, among the M digital ports, the resources of different digital ports are frequency-division, and the digital ports are distinguished by frequency-division.

[0317] In a possible implementation of Method 2, in the resources of the reference signal, the resources for different digital ports among the M digital ports to send the reference signal include M different frequency-domain units in the frequency domain. Specifically, M is greater than 1. When the frequency-domain resources for different digital ports among the M digital ports to send the reference signal are different and there is no code division multiplexing among the M digital ports, the resources for different digital ports to send the reference signal include M different frequency-domain units in the frequency domain. In this way, without code division multiplexing, different digital ports can send reference signals on different frequency-domain resources, which can improve the flexibility of scheme implementation. The frequency-domain unit may include one or more subcarriers or REs.

[0318] Optionally, the method further includes: the terminal device receives indication information indicating the M different frequency-domain units, so that the terminal device can clarify the resource positions of each frequency-domain unit based on the indication information. Optionally, the indication information is carried in the configuration information of the reference signal, or other messages / information / signaling, etc., which are not limited here. For example, the configuration information can configure the starting RE position of each digital port in the frequency domain, and different digital ports can occupy different frequency-domain resources.

[0319] As an implementation example of Method 2, as Figure 8 shown, taking the M digital ports including digital port 0, digital port 1, digital port 2, and digital port 3 in the figure as an example, the first digital port and the second digital port can be any two different digital ports among the four digital ports. In this example, assuming that each digital port includes two virtual port numbers, assuming that the number of time-domain units is the same as the number of virtual port numbers, then each digital port occupies two REs in the time domain. Additionally, assuming that each digital port occupies 1 RE in the frequency domain, then each digital port occupies a total of 2 REs, and the 4 digital ports can sequentially occupy the 1st, 2nd, 4th, and 5th frequency-domain REs in a resource block (RB). In Figure 8In the illustrated example, different digital ports among the M digital ports do not have code division multiplexing (no-CDM) (or, code division multiplexing is not adopted).

[0320] Optionally, for the same digital port, the frequency domain resources occupied by several virtual ports included in the same digital port are the same in different time units. In this way, the implementation complexity can be reduced.

[0321] Optionally, for different digital ports among the M digital ports, the number of virtual ports of the different digital ports can be the same.

[0322] Mode 3: In the resources of the reference signal, the M digital ports belong to Q groups of digital ports, each group of digital ports includes one or more digital ports, and Q is a positive integer; among them, the frequency domain resources for different groups of digital ports among the Q groups of digital ports to send the reference signal are different, the frequency domain resources for one or more digital ports included in the same group of digital ports among the Q groups of digital ports to send the reference signal are the same, and one or more digital ports included in the same group of digital port groups are code division multiplexed. Optionally, the code division multiplexing type of one or more digital ports included in the same group of digital port groups is frequency domain code division multiplexing.

[0323] In a possible implementation manner of Mode 3, in the resources of the reference signal, the resources for different digital ports among the M digital ports to send the reference signal all include the same M frequency domain units in the frequency domain. Specifically, M is greater than 1. When the time domain resources and frequency domain resources for different digital ports among the M digital ports to send the reference signal are the same and different digital ports are code division multiplexed, the resources for different digital ports to send the reference signal all include the same M frequency domain units in the frequency domain. In this way, it can be made that different digital ports send reference signals in a code division multiplexing manner on the same frequency domain units, and the same frequency domain units can be reused as much as possible to save communication resources and reduce the implementation complexity.

[0324] As an implementation example of Mode 3, such as Figure 9As shown, taking the four digital ports of digital port 0, digital port 1, digital port 2, and digital port 3 in the figure as examples of the M digital ports, the first digital port and the second digital port can be any two different digital ports among the four digital ports. In this example, the M digital ports are mapped to measurement resources first in ascending order of the OCC sequence index within the CDM group, and then in ascending order of the CDM group index. Assume that 2 CDM groups are configured, and each CDM group includes M / 2 digital ports. That is, digital ports 0 to M / 2 - 1 belong to the first CDM group (i.e., CDM group 0 including digital ports 0 and 1 shown in the figure), and digital ports M / 2 to M belong to the second CDM group (i.e., CDM group 1 including digital ports 2 and 3 shown in the figure).

[0325] Moreover, in this example, digital ports 0 and 1 occupy the same time-frequency resource, belong to CDM group 0, and the two digital ports are frequency-domain code division multiplexed FD-CDM2; digital ports 2 and 3 occupy the same time-frequency resource, belong to CDM group 1, and the two digital ports are frequency-domain code division multiplexed FD-CDM2; digital ports 0 and 1 are frequency division resources with digital ports 2 and 3, that is, they occupy different frequency-domain resources. Each digital port includes two virtual ports, occupies two time-domain symbols, and each digital port occupies two REs in the frequency domain.

[0326] It can be understood that in Figure 9 the example shown, in 2 symbols, different digital ports within the same CDM group can be code division multiplexed on the same symbol. For example, on the first symbol, in CDM 0, the OCC code encoded by the code sequence corresponding to digital port 0 is "+1" "-1", and the OCC code encoded by the code sequence corresponding to digital port 1 is "+1" "+1"; in CDM 1, the OCC code encoded by the code sequence corresponding to digital port 2 is "+1" "-1", and the OCC code encoded by the code sequence corresponding to digital port 3 is "+1" "+1".

[0327] Optionally, in the second example, when M is greater than 1, the method further includes: the terminal device receives indication information indicating that the resources of the reference signal meet one of the above methods 1 to 3. In this way, the terminal device can clarify the resource configuration method of different digital ports among the M digital ports based on the indication information.

[0328] Optionally, the indication information is carried in the configuration information of the reference signal, or other messages / information / signaling, etc., which is not limited here. Or, the terminal device determines that the resources of the reference signal meet one of the above methods 1 to 3 through pre-configuration.

[0329] Taking Figure 2Taking the communication process between the network device and the terminal device shown as an example, in order to obtain the channel information between the network device and the terminal device, a commonly used method is for the network device to send downlink reference signals, and the terminal device feeds back the corresponding channel state information according to the downlink reference signals, including precoding information, the number of transmission streams supported by the channel (i.e., RI), and CQI (used to feedback the MCS recommended by the terminal under the current channel quality). This process is called channel state information feedback (CSI feedback). Generally, for different beams, the network device will independently send reference signals for each beam, and the terminal device measures the reference signals corresponding to each beam and feeds back the measurement results of each beam. Specifically, the network device will configure multiple resources for the terminal, each resource corresponding to a transmission beam of the network device, and the terminal device feeds back the beam measurement results.

[0330] With the development of communication technologies, in order to improve the coverage ability of communication signals (such as millimeter wave signals), the scale of the antenna array for transmitting and receiving communication signals becomes larger, and the number of beams will also increase accordingly. On the one hand, the number of symbols for beam scanning increases, resulting in an increase in beam scanning overhead; on the other hand, the increase in the array leads to narrower beams, posing a greater challenge to the terminal mobility.

[0331] To solve this problem, in Figure 3 the technical solution shown, the reference signal received by the terminal device in step S301 is transmitted through L 1 time units respectively by L 1 first weights. The i-th first weight among the L 1 first weights is obtained by the i-th second weight among the L 1 second weights and the third weight. The L 1 second weights are orthogonal. In other words, the reference signal is transmitted through orthogonal weights at different times. Therefore, the terminal device can obtain the beam channel of the subarray by taking the inverse, and then obtain the weights of the optimal virtual ports by calculating a certain criterion (such as power maximization criterion, capacity maximization criterion, etc.). Thereafter, the measurement information sent by the terminal device in step S302 can be used to determine the weights. In this way, when the scale of the antenna array is large, the beam scanning overhead can be reduced and fast beam tracking can be achieved.

[0332] Exemplarily, assume that the first digital port contains two (i.e., N 1 = 2) virtual ports, and the two virtual ports respectively correspond to the antenna element set 0 and the antenna element set 1 in the network device. Assume that the aforementioned third weight corresponds to two sub-vectors w 0 and w 1 , w 0 and w 1 are both column vectors, and the vector That is the aforementioned third weight. It is also assumed that the channel information between antenna element set 0 and antenna element set 1 and the terminal device is represented as H 0 and H 1 ; in step S301 above, the network device can send reference signals based on 2 virtual ports in 2 (i.e., L 1 = 2) time units. The following will describe by taking these 2 time units as time unit 0 and time unit 1 respectively.

[0333] For time unit 0, phase adjustments of s 00 and s 10 are respectively performed on virtual port 0 and virtual port 1. s 00 and s 10 can form one of the second weights among L 1 second weights. Then one of the first weights among L 1 first weights can be expressed as The signal G 0 received by the terminal device at this time unit 0 satisfies:

[0334]

[0335] For time unit 1, phase adjustments of s 01 and s 11 are respectively performed on virtual port 0 and virtual port 1. s 01 and s 11 can form another second weight among L 1 second weights. Then another first weight among L 1 first weights can be expressed as The signal G 1 received by the terminal at this time unit 1 satisfies:

[0336]

[0337] Combining G 0 and G 1 results in:

[0338]

[0339] Since the phase modulation matrix is composed of L 1 orthogonal first weights, it is invertible. Then the terminal can obtain according to the received signals of L 1 time units and L 1 orthogonal first weights:

[0340]

[0341] Taking the power maximization criterion as an example (similarly, the capacity maximization criterion or other criteria can refer to the following implementation), if we want to maximize the signal power obtained by the terminal device, the optimal second weight can be obtained according to the following principle:

[0342]

[0343] For the above principle, one implementation can obtain the optimal second weight through SVD decomposition:

[0344] First, calculate the covariance matrix R of [H 0 w 0 H 1 w 1 that satisfies:

[0345] R = [H 0 w 0 H 1 w 1 H [H 0 w 0 H 1 w 1 ;

[0346] Then perform SVD decomposition on R, take the right singular vector v corresponding to the largest singular value, and further obtain α:

[0347]

[0348] Through the above implementation process, if the terminal sends α or [H 0 w 0 H 1 w 1 to the network device, then the network device can obtain a 0 corresponding to the antenna element set 0, and a 1 corresponding to the antenna element set 1. Further, when performing data transmission (such as data sending or data receiving), the analog weights of the antenna element set 0 and the antenna element set 1 in the network device can be α 0 w 0 and α 1 w 1 . In this way, compared with the implementation process in which the network device obtains the weights of each antenna element set during the data transmission process through multiple beam scanning processes with different precisions, since the network device can obtain the analog weights of different antenna element sets without going through multiple beam scanning processes with different precisions, it can reduce the beam scanning overhead and reduce the delay of beam scanning to achieve fast beam tracking.

[0349] ​In other words, the measurement information sent by the terminal device in step S302 can be used to determine the analog weights (such as α 0 w 0 and α 1 w 1 ) of the antenna element set in the network device. The specific implementation process of the measurement information will be described below.

[0350] In a possible implementation manner, the measurement information sent by the terminal device in step S302 includes first information obtained by measuring the reference signal sent based on the first digital port; wherein, the first information is N 1 channel information, that is, the channel information of N 1 virtual ports. It can be understood that, as described above, after the terminal device receives the reference signal, the terminal device can determine N 1 channel information determined by the reference signal sent through the N 1 virtual ports.

[0351] As an implementation example of the N 1 channel information, as shown in the example above, when the terminal device receives signal G 0 at time unit 0 and the terminal device receives signal G 1 at time unit 1, signal G 0 and signal G 1 satisfy:

[0352]

[0353] Correspondingly, the N 1 channel information respectively corresponding to 2 (i.e., N 1 = 2) virtual ports can be expressed as the channel information H 0 w 0 of virtual port 0 (i.e., antenna element set 0), and the channel information H 1 w 1 of virtual port 1 (i.e., antenna element set 1). Among them, when the first information includes N 1 channel information, the first information can include the quantization feedback value of N 1 channel information (i.e., [H 0 w 0 H 1 w 1 ), or the first information can include based on N 1 channel information (i.e., [H 0 w 0 H 1 w 1) The obtained PMI. In this possible implementation, optionally, the network device may determine α according to the N channel information respectively corresponding to the N virtual ports received, and criteria such as the power maximization criterion and the capacity maximization criterion, so as to determine the weights of the N virtual ports. 1 N 1 channel information, and criteria such as the power maximization criterion and the capacity maximization criterion to determine α, thereby determining the weights of the N virtual ports. 1 weights of the virtual ports.

[0354] In another possible implementation, the measurement information sent by the terminal device in step S302 includes the first information obtained by measuring the reference signal sent based on the first digital port; wherein, the first information is determined based on the N channel information, and the N channel information is respectively determined by the reference signals sent through the N virtual ports, and the first information is used to determine the weights of the N virtual ports in the first digital port. In this way, after the terminal device measures the reference signals carried by L time units to obtain a measurement result, the terminal device can determine the better (or optimal) weights of the virtual ports in the first digital port based on the measurement result, and indicate the weights through the first information. Subsequently, the network device can communicate with the terminal device based on the weights. 1 N 1 channel information, and the N channel information is respectively determined by the reference signals sent through the N virtual ports, and the first information is used to determine the weights of the N virtual ports in the first digital port. 1 N 1 weights of the virtual ports. 1 After the terminal device measures the reference signals carried by L time units to obtain a measurement result, the terminal device can determine the better (or optimal) weights of the virtual ports in the first digital port based on the measurement result, and indicate the weights through the first information. Subsequently, the network device can communicate with the terminal device based on the weights.

[0355] Thus, in the case of a large antenna array scale, the network device sends reference signals based on orthogonal second weights in different time units (generally, the reference signals sent based on different weights can be understood as the reference signals sent based on different beams). The terminal device can determine and indicate the better (or optimal) weights based on the measurement results of different time units, so that the network device can communicate based on the weights, thereby reducing the beam scanning overhead and achieving fast beam tracking.

[0356] Optionally, after the terminal device measures the reference signals carried by L time units to obtain a measurement result, the terminal device can determine the better (or optimal) weights of the virtual ports in the first digital port based on the measurement result and a mathematical method. For example, the mathematical method may include power maximization criterion, capacity maximization criterion determination, etc. For example, when the network device sends data, if the data is transmitted with reference to the foregoing reference signal, then the weights of the N virtual ports can be determined by the first information fed back by the terminal device. 1 L 1 weights of the N virtual ports can be determined by the first information fed back by the terminal device.

[0357] In a possible implementation, the weights of the N virtual ports in the first digital port are obtained through a first weight vector, and the first weight vector includes N 1 N 1elements; among them, the N 1 virtual ports respectively correspond to N 1 antenna element sets, each antenna element set contains one or more antenna elements, and the N 1 elements are respectively used to adjust the phases of the N 1 antenna element sets. In other words, by adjusting the phases of the antenna elements, the transmission of reference signals can be achieved at different virtual ports.

[0358] It can be understood that the first weight vector contains N 1 elements, and the second weight described above contains N 1 elements corresponding to the N 1 virtual ports. Among them, the implementation process of the first weight vector can refer to the implementation process of the second weight above.

[0359] In a possible implementation manner, the weights of the N 1 virtual ports in the first digital port are obtained through the first weight vector, including: the weights of the N 1 virtual ports in the first digital port are obtained through the first weight vector and the second weight vector, and the second weight vector includes N 1 sub-vectors; among them, the dimension of the T-th sub-vector in the N 1 sub-vectors is the same as the number of antenna elements in the T-th antenna element set in the N 1 antenna element sets, and the value range of T is from 1 to N 1 . In this way, the first weight vector can respectively correspond to the weights of each antenna element set in the N 1 antenna element sets.

[0360] It can be understood that the second weight vector contains N 1 sub-vectors, and the third weight described above includes N 1 sub-vectors. Among them, the implementation process of the second weight vector can refer to the implementation process of the third weight above.

[0361] As an implementation example of the N 1 virtual ports, as described above, when N 1 = 2, the virtual weights (or the weights of the N 1 virtual ports) of the N 1 virtual ports in the network device can be expressed as α 0 w 0 and α 1 w 1 . Correspondingly, in this example, the N 1 elements included in the first weight vector are respectively α 0 and α1 , the N sub-vectors included in the second weight vector are respectively w 1 and w 0 and 1 .

[0362] In a possible implementation, the first information satisfies any one of the following methods A to D.

[0363] Method A: In the first information included in the measurement information sent by the terminal device in step S302, it includes the quantization processing result of the first weight vector. In other words, after the terminal device determines the first weight vector, the terminal device directly quantizes the first weight vector and feeds it back. For example, if the first weight vector includes N 1 elements, the terminal device quantizes the phases of the N 1 elements, and feeds back the quantization results of the N 1 elements.

[0364] As an implementation example of Method A, when the feedback phase range is 0 to 2π and the quantization accuracy is 0.1π, then there are 21 possible values for the feedback phase (i.e., 0, 0.1π, 0.2π... 2π, a total of 21 values). Correspondingly, among the N 1 elements, the feedback value of each element can occupy A (A is a positive integer) bits, and the feedback of the phases of the N 1 elements occupies N 1 *A bits. For example, A can take a value of (representing the ceiling of log 2 21), or A can take a value of 21, or A can take other values determined based on 21, which is not limited here.

[0365] Optionally, the network device configures the quantization accuracy of the phases corresponding to the elements in the first weight vector. For example, it is configured through the configuration information of the reference signal, or through other information / messages / signals.

[0366] Method B: In the first information included in the measurement information sent by the terminal device in step S302, it includes one element among the N 1 elements corresponding to one of the N virtual ports, and, in addition to this one virtual port, the quantization processing results of the differences between the N 1 elements corresponding to the other N 1 -1 virtual ports and this one element. 1 Among the N 1 -1 elements corresponding to the other N

[0367] As an implementation example of Method A, the range of the feedback phase is 0 to 2π, the quantization accuracy of the first element is 0.1π, so there are 21 possible values for the feedback phase, and A bits are required for the feedback of the first element; the remaining elements feedback the difference from the first element, the quantization accuracy of the elements is 0.2π, and for the feedback of the remaining elements, there are 11 possible values for the feedback phase and B bits are required for each element. In other words, for N 1 elements, a total of A+(N 1 -1)B bits are feedback. For example, the value of A is and the value of B is Or, A is 21 and B is 11, or, A is other values determined based on 21 and B is other values determined based on 11, which are not limited here.

[0368] Method C: In the first information included in the measurement information sent by the terminal device in step S302, it includes a first index and a second index, and the first index and the second index are used to determine the first weight vector of the first digital port among one or more weight vectors included in the codebook set. Among them, the first index is the codebook index in the first dimension, the second index is the codebook index in the second dimension, and among the one or more weight vectors included in the codebook set, each weight vector is determined by the weight in the first dimension and the weight in the second dimension.

[0369] Method D: In the first information included in the measurement information sent by the terminal device in step S302, it includes a third index, and the third index is used to determine the first weight vector of the first digital port among one or more weight vectors included in the codebook set.

[0370] It should be noted that the codebook sets involved in Method C and Method D can be determined in multiple ways, and some implementation examples will be described below.

[0371] Determination method 1 of the codebook set: Determine the codebook set based on the port information of the virtual ports included in the digital port.

[0372] Specifically, the port information of the virtual ports in any digital port includes at least one of the following information A to information F:

[0373] Information A. Index of the port information combination. For example, the index value corresponding to each combination, and each index value represents a combination of virtual port splitting method, oversampling factor, and number of virtual ports. The network device can indicate this index value, and the terminal device can then determine the virtual port splitting method, oversampling factor, number of virtual ports, etc. The values corresponding to the "Index" shown in Table 3 below. The virtual port splitting method can be understood as the number of virtual ports in the first dimension and the number of virtual ports in the second dimension. The oversampling factor can be understood as the oversampling factor in the first dimension and the oversampling factor in the second dimension.

[0374] Information B. The number of virtual ports included in the digital port is N 1 . For example, the number of virtual ports N of each digital port, which is used to indicate that the network device splits the array surface into N sub-arrays in total (taking the first digital port including N 1 virtual ports as an example, splitting the array surface of the first digital port to obtain N 1 sub-arrays, where these N 1 sub-arrays are the N 1 antenna element sets corresponding to N 1 virtual ports, that is, each of the N 1 sub-arrays contains one or more antenna elements). Generally, N = M 1 *M 2 .

[0375] Information C. The number of virtual ports in the first dimension of the digital port is M 1 . For example, the horizontal number of virtual ports M of each digital port 1 , which is used to indicate that the network device splits the array surface horizontally into M 1 sub-arrays. It can also be understood that the first dimension of each digital port includes M 1 virtual ports.

[0376] Information D. The number of virtual ports in the second dimension of the digital port is M 2 . For example, the vertical number of virtual ports M of each digital port 2 , which is used to indicate that the network device splits the array surface vertically into M 2 sub-arrays. It can also be understood that the second dimension of each digital port includes M 2 virtual ports.

[0377] Information E. The oversampling factor in the first dimension of the digital port is O 1 . For example, the oversampling factor O in the horizontal dimension of each digital port 1 , which can also be understood as the oversampling factor in the first dimension of each digital port.

[0378] Information F. The oversampling factor on the second dimension of the digital port is O 2 . For example, the oversampling factor O on the vertical dimension of each digital port 2 , which can also be understood as the oversampling factor on the second dimension of each digital port.

[0379] Optionally, the above information C can be determined by information B and information D, that is, M 2 = N 1 / M 1 , N 1 is divisible by M 1 ; alternatively, the above information D can be determined by information B and information C, that is, M 1 = N 1 / M 2 , N 1 is divisible by M 2 .

[0380] Exemplarily, the above different combinations can be represented by the parameters in different rows of Table 3 below.

[0381] Table 3

[0382] Index Number of virtual ports (N) <![CDATA[(M 1 ,M 2 )]]> <![CDATA[(O 1 ,O 2 )]]> 0 2 (2,1) (4,1) 1 4 (4,1) (4,1) 2 4 (2,2) (4,4) 3 8 (4,2) (4,4) 4 8 (8,1) (4,1) … … … …

[0383] Optionally, for the number of virtual ports (M 1 , M 2 ) = (N, 1) and (1, N) on the first and second dimensions, the terminal device does not need to perceive and can use the same index value. For example, in the above Table 3, the codebook sets corresponding to (M 1 , M 2 ) = (2, 1) or (1, 2) indicated by index = 0 are the same, so there is no need to distinguish.

[0384] Thus, according to the port information of the virtual ports in any of the above digital ports, an analog codebook set can be determined between the terminal device and the network device. Specifically, according to the number of virtual ports on the first dimension being M 1 and the oversampling factor on the first dimension being O 1 , it can be determined that there are M 1 O 1 codebooks on the first dimension, where v l represents the l-th codebook (a vector of length M 1 ), and the value range of l is All the codebooks on the first dimension (i.e., all v l ) are denoted as Y 1 ; according to the number of virtual ports on the second dimension being M 2 and the oversampling factor on the second dimension being O 2 , it can be determined that there are M 2O 2 Codebook,u m Represents the mth codebook (length M 2 The value range of m is All codebooks of the second dimension (i.e., all u m ) is denoted as Y 2 , and finally determine the codebook set to be Y.

[0385]

[0386]

[0387]

[0388] As an implementation example, before step S302, the network device may send second information to the terminal device, and the second information may be used to determine the port information of the virtual port included in the first digital port, and then determine the codebook set used in mode C or mode D based on the port information.

[0389] For example, the second information may include port information of the virtual port included in the first digital port (eg, at least one item of the above information A to information F). Taking Table 3 as an example, the second information may include one or more parameters of one row in Table 3.

[0390] For another example, the second information may include a fourth index, and the fourth index is used to determine the port information of the virtual port included in the first digital port in the port information of one or more preconfigured or predefined virtual ports, wherein the port information of each virtual port may include at least one item of the above information A to information F. Figure 3 For example, the fourth index included in the second information may be one of the indexes in Table 3, so that the network device determines one row of parameters in Table 3 based on the index. Optionally, before the network device sends the fourth index to the terminal device, the network device sends port information of one or more virtual ports and corresponding indexes, as shown in Table 3.

[0391] For another example, the second information may include some items in information A to information F, and other items in information A to information F are determined by the partial items and port information of one or more preconfigured or predefined virtual ports. Figure 3 For example, the second information may indicate “(M 1 ,M 2 )=(4,1)”, accordingly, the network device can determine, based on the second information, that the indication corresponds to the row where the index “1” in the table is located, and further determine that “N=4” and “(O 1 ,O 2 )=(4,1)”.

[0392] For another example, the second information may include some items among information A to information F, and the other items among information A to information F are determined by the some items. For example, the second information includes information B and information D, and information C can be determined by information B and information D, that is, M 2 = N 1 / M 1 , N 1 is divisible by M 1 ; or, the second information includes information B and information C, and the above information D can be determined by information B and information C, that is, M 1 = N 1 / M 2 , N 1 is divisible by M 2 ; or, the second information includes information C and information D, and the above information B can be determined by information C and information D, that is, N 1 = M 1 *M 2 .

[0393] Optionally, the first digital port is one of the M digital ports. When M is greater than 1, different digital ports can configure or stipulate the port information of the corresponding virtual ports in any one or more of the following ways or protocols:

[0394] ① Configure or stipulate the port information of the corresponding virtual port for each digital port independently.

[0395] ② Multiple digital ports correspond to the port information of one virtual port. Specifically, each digital port adopts the same virtual port splitting method (the same number of virtual ports in the same first dimension, the same number of virtual ports in the same second dimension), the same oversampling factor (the same oversampling factor in the same first dimension, the same oversampling factor in the same second dimension), and the same number of virtual ports.

[0396] As an example of method ①, the network device configures or dynamically indicates the port information of the virtual port of each digital port (that is, at least one item among the above information A to information F) for the terminal device. For example, the network device configures the measurement resources of one or more digital ports, and each digital port includes one or more virtual ports. The network device configures or dynamically indicates the port information of the virtual port of each digital port for the terminal device. The measurement resources can be SSB, CSI-RS, etc., which are not limited here.

[0397] As another example of method ①, the network device configures or dynamically indicates some items among information A to information F of each digital port for the terminal device, and the other items among information A to information F are determined by the some items and / or one or more pre-configured or predefined port information of the virtual ports.

[0398] As another example of Method ①, the network device directly configures or indicates the fourth index corresponding to each digital port for the terminal through signaling. The signaling can be one or more of RRC signaling, MAC CE signaling, DCI signaling, etc., or other signaling, which is not limited here.

[0399] As an example of Method ②, the network device configures or the protocol stipulates one or more digital port groups. Each digital port group contains one or more digital ports, and one digital port group corresponds to the port information of the same virtual port. The network device configures the port information of one type of virtual port for each digital port group, and each digital port within the digital port group has the port information of the same virtual port.

[0400] As another example of Method ②, the network configuration or the protocol stipulates the port information of one or more types of virtual ports, and the protocol stipulates that every k digital ports adopt the port information of one type of virtual port. For example, the network configuration or the protocol stipulates the port information of two types of virtual ports, and there are a total of 8 digital ports. Then the protocol stipulates that ports 0 to 3 adopt the port information of the first type of virtual port, and ports 4 to 7 adopt the port information of the second type of virtual port. Of course, it can also be that ports 0, 2, 4, 6 adopt the first type, and ports 1, 3, 5, 7 adopt the second type. It is similar to this default rule.

[0401] For example, the network device configures or indicates M 1 , M 2 , O 1 , O 2 to be 2, 2, 2, 1 respectively. Then there are a total of 4 (M 1 *M 2 = N 1 = 4) virtual ports, and the number of codebooks in the corresponding analog codebook set is 8 = M 1 *M 2 *O 1 *O 2 = 2 * 2 * 2 * 1.

[0402] Among them, there are 4 codebooks for the horizontal direction (for example, the first dimension), satisfying:

[0403]

[0404] In other words, the 4 horizontal codebooks are respectively represented as:

[0405] v 0 = [1 1] T ;

[0406] v 1 = [1 j] T ;

[0407] v 2 = [1 -1] T ;

[0408] v 3 = [1 -j] T ;

[0409] Define Y 1 including the codebooks in these four horizontal directions, which can be expressed as:

[0410]

[0411] There are 2 codebooks for the vertical direction (e.g., the second dimension), satisfying:

[0412]

[0413] In other words, the 2 codebooks in the vertical direction are respectively expressed as:

[0414] u 0 = [1 1] T ;

[0415] u 1 = [1 -1] T ;

[0416] Define Y 2 including the codebooks in these two vertical directions, which can be expressed as:

[0417]

[0418] That is, the codebook set can be expressed as:

[0419]

[0420] Among them, the 4 rows of the matrix represent four virtual ports, and the columns represent 8 codebooks (i.e., 8 weight vectors).

[0421] As an example, if the terminal device performs feedback through measurement in mode C, assuming that the terminal device determines and feeds back the first index and the second index as 2 and 1 respectively based on the power maximization criterion or the capacity maximization criterion. Correspondingly, the network device can determine the 6th weight vector as the first weight vector of the first digital port among the above 8 codebooks based on the index values "2, 1" carried in the first information. In other words, the horizontal and vertical weight vectors corresponding to the index values "2, 1" are respectively:

[0422] v 2 = [1 -1] T .

[0423] u 1 = [1 -1]T 。

[0424] Then the network device determines the final codebook as the first weight vector:

[0425]

[0426] In the above example, among the first weight vectors corresponding to 4 (i.e., M 1 *M 2 = N 1 = 4) virtual ports, the 4 elements a 0 , a 1 , a 2 , a 3 satisfy:

[0427] a 0 = 1, a 1 = -1, a 2 = -1, a 3 = 1;

[0428] In addition, when the 4 (i.e., M 1 *M 2 = N 1 = 4) virtual ports' corresponding second weight vectors' 4 sub-vectors are respectively represented as w 0 , w 1 , w 2 , w 3 , the simulated weights W of these 4 virtual ports during data transmission can be respectively represented as:

[0429]

[0430] As another example, if the terminal device performs feedback after measurement in mode D, feeds back the third index, and the third index corresponds to one of the 8 codebooks. Suppose the terminal device determines and feeds back the third index as 3 based on the power maximization criterion or the capacity maximization criterion (the 4th weight vector among the above 8 codebooks is the first weight vector of the first digital port), then the network device determines the final codebook as the first weight vector:

[0431] Y = [1 -1 j -j] T 。

[0432] In the above example, among the first weight vectors corresponding to 4 (i.e., M 1 *M 2 = N 1 = 4) virtual ports, the 4 elements a 0 , a 1 , a 2 , a 3 satisfy:

[0433] a 0 = 1, a 1 = -1, a 2 = j, a 3 = -j;

[0434] In addition, when the four (i.e., M 1 *M 2 = N 1 = 4) virtual ports correspond to four sub-vectors included in the second weight vector, which are respectively denoted as w 0 , w 1 , w 2 , w 3 , the simulated weights W of these four virtual ports during data transmission can be respectively expressed as:

[0435]

[0436] Determination method 2 of the codebook set: Based on the indication of the network device, determine the codebook set used in method C or method D in one or more codebook sets.

[0437] As an implementation example, before step S302, the network device can send second information to the terminal device, and this second information can be used to determine the codebook set used in method C or method D in one or more codebook sets.

[0438] For example, the second information can include a fifth index, and this fifth index is used to determine the codebook set in one or more pre-configured or pre-defined codebook sets.

[0439] Another example, as can be seen from the above example, during the determination process of the codebook set, it is associated with one or more of information A to information F. Correspondingly, the mapping relationship between "one or more of information A to information F" and "one or more codebook sets" can be pre-configured or pre-defined. Correspondingly, the third information sent by the network device can indicate one or more of information A to information F (such as in Table 3), and subsequently, the terminal device can determine one of the codebook sets in the one or more codebook sets as the codebook set used in method C or method D based on one or more of information A to information F and this "mapping relationship".

[0440] Optionally, the terminal device can determine the one or more codebook sets in a pre-configured or pre-defined manner.

[0441] Optionally, the terminal device can receive a signaling from the network device and determine the one or more codebook sets through this signaling. For example, the signaling can include one or more of RRC signaling, MAC CE signaling, DCI signaling, etc.

[0442] It should be noted that the network device can indicate the codebook set used in Mode C or Mode D in the one or more codebook sets in various ways.

[0443] As can be seen from the foregoing implementation process, the first digital port is one of the M digital ports. When M is greater than 1, the measurement information sent by the terminal device in step S302 can be used to determine the weights of the virtual ports included in each digital port (i.e., the weights for data transmission). More implementation examples will be described below.

[0444] In a possible implementation manner, the measurement information includes any one of the following Examples A to C:

[0445] Example A: M pieces of information.

[0446] Example B: K pieces of information.

[0447] Example C: M pieces of information and K pieces of information.

[0448] Among them, the M pieces of information are respectively used to determine the first weight vector of each of the M digital ports (for example, the i-th (i ranges from 1 to M) piece of information among the M pieces of information is used to determine the first weight vector of the i-th digital port among the M digital ports; alternatively, the M pieces of information correspond one-to-one with the M digital ports); one of the M pieces of information is the first information; the K pieces of information are respectively used to determine the first weight vector of each digital port group in K groups of digital ports (for example, the i-th (i ranges from 1 to K) piece of information among the K pieces of information is used to determine the first weight vector of the digital ports included in the i-th digital port group among the K digital port groups; alternatively, the K pieces of information correspond one-to-one with the K digital port groups), where each group of digital ports in the K groups of digital ports includes one or more of the M digital ports, and K is a positive integer less than or equal to M; one of the K pieces of information is the first information.

[0449] Specifically, the measurement information sent by the terminal device can include M pieces of information and / or K pieces of information. In this way, the network device can determine the first weight vector of each of the M digital ports through the M pieces of information and / or the K pieces of information.

[0450] As an implementation example, in Example B and Example C, among the one or more digital ports included in each group of the K groups of digital ports, the port information of the virtual ports of different digital ports is the same. Specifically, when the measurement information includes K pieces of information, the K pieces of information are respectively used to determine the first weight vector of the digital ports included in each digital port group of the K groups of digital ports, where each group of the K groups of digital ports includes one or more digital ports among the M digital ports. And, among the one or more digital ports included in each group of the K groups of digital ports, the port information of the virtual ports of different digital ports is the same. In this way, the feedback process of the measurement information can be simplified, and the implementation complexity can be reduced.

[0451] In Example A, when the measurement information includes M pieces of information, different digital ports independently feedback the first weight vector.

[0452] The network device configures the terminal device so that each digital port independently feedbacks the first weight vector. Optionally, the network device configures the order in which the terminal feedbacks the first weight vectors of different digital ports. It can also be agreed upon in a certain order, such as from small to large or from large to small according to the digital port index; it can also be in the order of horizontal digital ports first and then vertical digital ports, or vertical first and then horizontal, etc.

[0453] As an implementation example, in Example B, when the measurement information includes K pieces of information, multiple digital ports feedback the same first weight vector.

[0454] For example, the network device configures the number of groups of digital ports (i.e., configures the value of K). In other words, the network device configures one or more groups of digital ports, each group of digital ports includes one or more digital ports, and the network device configures each group of digital ports to feedback the same first weight vector.

[0455] Another example is that the network device configures the number of first weight vectors to be feedback (i.e., configures the number of digital ports included in each group of the K groups of digital ports). In other words, the terminal device can feedback the same first weight vector for every c (c is a positive integer, such as c = M / K) digital ports.

[0456] Exemplarily, for the 8 digital ports (i.e., digital ports 0 to 7) included in the network device, the network device configures the number of groups of digital ports to be 2 (i.e., the value of K is configured to be 2), or the network device configures the number of first weight vectors to be fed back to be 2 (i.e., the number of digital ports included in each of the K groups of digital ports is 4). Then, a first weight vector can be fed back from digital ports 0 to 3, and a first weight vector can be fed back from digital ports 4 to 7. Generally, if two digital ports correspond to different polarizations of an array face and feed back the same first weight vector, the terminal device does not perceive the polarization method but only perceives the digital ports.

[0457] Correspondingly, the terminal device feeds back the same first weight vector according to the digital ports with the same virtual port splitting method.

[0458] As an implementation example, in Example C, the terminal device feeds back the first weight vector of each digital port separately and also feeds back the same first weight vector corresponding to multiple digital ports.

[0459] Optionally, the measurement information satisfies any one of the following:

[0460] When the rank number of the reference signal satisfies the first condition, the measurement information includes the M pieces of information;

[0461] When the rank number of the reference signal satisfies the second condition, the measurement information includes the K pieces of information;

[0462] When the channel quality information CQI of the reference signal satisfies the third condition, the measurement information includes the M pieces of information;

[0463] When the CQI of the reference signal satisfies the fourth condition, the measurement information includes the K pieces of information.

[0464] As an implementation example, when the network device configures different Rank numbers, different digital ports in the terminal device feed back the same or different first weight vectors. Since the rank number is related to the rank of the channel, when the Rank number is large, it means that the multipath of the channel is relatively rich, so different directions of beam coverage can be used, and different digital ports can feed back different first weight vectors. Conversely, when the Rank number is small, it means that there are few channel paths, and the same first weight vector can be fed back by different digital ports. For example, the terminal device can feed back a first weight vector for different digital ports, which can save overhead.

[0465] As an implementation example, the network device configures or the protocol stipulates that when the rank number of the channel information fed back by the terminal is 1, the terminal feeds back the same first weight vector for all digital ports, that is, the terminal only needs to feed back one first weight vector for different digital ports.

[0466] As an implementation example, the network device configuration or protocol stipulates that when the number of ranks is configured as N, the terminal feeds back N first weight vectors. Optionally, the terminal device feeds back the digital port index corresponding to each first weight vector among the N first weight vectors.

[0467] As an implementation example, the network device configures or the protocol stipulates a rank threshold. When the rank is greater than the threshold, the terminal device independently feeds back the first weight vector for each digital port; when the rank is less than the threshold, the terminal device feeds back the same first weight vector for different digital ports, that is, the terminal only needs to feed back one first weight vector for different digital ports.

[0468] As an implementation example, the network device configures or the protocol stipulates a CQI threshold. When the CQI of the feedback channel information is greater than the threshold, the first weight vector is fed back for each port. When the CQI of the feedback channel information is less than the threshold, the terminal device feeds back the same first weight vector for different digital ports. CQI mainly reflects the quality of the channel. When the CQI is relatively large, it indicates that the channel quality is good, and each digital port can independently measure and determine the first weight vector; when the CQI is relatively small, it indicates that the channel quality is not good, and multiple digital ports need to jointly estimate the first weight vector, so multiple digital ports feed back one first weight vector.

[0469] In a possible implementation manner, the method further includes: the terminal device receives indication information indicating that the measurement information includes the M pieces of information and / or the K pieces of information. In this way, it can be made clear to the terminal device and the network device the information content carried by the measurement information.

[0470] Optionally, the indication information is carried in the configuration information of the reference signal, or other messages / information / signaling, etc., which is not limited here.

[0471] In a possible implementation manner, the measurement information is the measurement information corresponding to the first carrier. The measurement information is used to determine the first weight vector of each digital port among the M digital ports corresponding to the first carrier. The first carrier includes one or more carriers (optionally, in the case where the first carrier includes multiple carriers, it can also be understood that the measurement information is the measurement information corresponding to multiple carriers (such as the second carrier, the third carrier, etc.));

[0472] Or, the measurement information is the measurement information corresponding to the first BWP. The measurement information is used to determine the first weight vector of each digital port among the M digital ports corresponding to the first BWP. The first BWP includes one or more BWPs (optionally, in the case where the first BWP includes multiple BWPs, it can also be understood that the measurement information is the measurement information corresponding to multiple BWPs (such as the second BWP, the third BWP, etc.));

[0473] Or the measurement information is the measurement information corresponding to the first bandwidth, and the measurement information is used to determine the first weight vector of each of the M digital ports corresponding to the first bandwidth. The first bandwidth includes one or more sub-bands (optionally, in the case where the first bandwidth includes multiple sub-bands, it can also be understood that the measurement information is the measurement information corresponding to multiple bandwidths (such as the second bandwidth, the third bandwidth, etc.)).

[0474] Specifically, the measurement information can be used to determine the first weight vector of each of the M digital ports corresponding to one or more carriers (or, one or more BWPs, or one or more sub-bands), so as to improve the flexibility of the scheme implementation.

[0475] Exemplarily, taking the measurement information as the measurement information corresponding to the first carrier as an example.

[0476] In the case where the first carrier includes one carrier, the terminal device can measure the channel information of the one carrier based on the reference signal in step S301, and the measurement information of the terminal device in step S302 is used to determine the weights of the virtual ports of the M digital ports corresponding to the one carrier.

[0477] In the case where the first carrier includes D (D>1) carriers, the terminal device can measure the channel information of the D carriers based on the reference signal in step S301, and the measurement information of the terminal device in step S302 is used to determine the weights of the virtual ports of the M digital ports corresponding to the D carriers.

[0478] For example, the measurement information may include the weights of the virtual ports of the M digital ports corresponding to one of the carriers (denoted as weight 1), and the weights of the M virtual ports corresponding to different carriers are the same, that is, the network device can determine that the weights of the virtual ports of the M digital ports corresponding to the D carriers are all weight 1.

[0479] Another example is that the measurement information may include the weights of the virtual ports of the M digital ports corresponding to D carriers (denoted as weight 1...weight D), and the network device can determine the weights of the virtual ports of the M digital ports corresponding to the D carriers based on weight 1...weight D respectively.

[0480] Similarly, in the case where the measurement information is the measurement information corresponding to the first bandwidth (or the measurement information is the measurement information corresponding to the first bandwidth), the implementation example of the measurement information corresponding to the first carrier can be referred to.

[0481] Please refer to Figure 10, embodiments of the present application provide a communication device 1000, which can implement the functions of the terminal device (or network device) in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments. In the embodiments of the present application, the communication device 1000 may be a terminal device (or network device), or an integrated circuit or component inside the terminal device (or network device), such as a chip. In the following embodiments, the communication device 1000 is taken as an example of a terminal device or a network device for illustration.

[0482] In a possible implementation, when the device 1000 is used to execute the method performed by the terminal device in the foregoing embodiments, the device 1000 includes a processing unit 1001 and a transceiver unit 1002; the transceiver unit 1002 is used to receive a reference signal, and the reference signal is sent through M digital ports, where M is a positive integer; among them, the first digital port among the M digital ports includes N 1 virtual ports, and N 1 is an integer greater than or equal to 1; the processing unit 1001 is used to determine measurement information, and the transceiver unit 1002 is also used to send measurement information, and the measurement information includes first information obtained by measuring based on the reference signal sent through the first digital port; among them, the first information is determined based on N 1 channel information, and the N 1 channel information is respectively determined by the reference signals sent through the N 1 virtual ports, and the first information is used to determine the weights of the N 1 virtual ports in the first digital port.

[0483] In a possible implementation, when the device 1000 is used to execute the method performed by the network device in the foregoing embodiments, the device 1000 includes a processing unit 1001 and a transceiver unit 1002; the processing unit 1001 is used to determine a reference signal, and the transceiver unit 1002 is used to send the reference signal, and the reference signal is sent through M digital ports, where M is a positive integer; among them, the first digital port among the M digital ports includes N 1 virtual ports, and N 1 is an integer greater than or equal to 1; the transceiver unit 1002 is also used to receive measurement information, and the measurement information includes first information obtained by measuring based on the reference signal sent through the first digital port; among them, the first information is determined based on N 1 channel information, and the N 1 channel information is respectively determined by the reference signals sent through the N 1 virtual ports.

[0484] It should be noted that for the information execution process and other contents of the units of the above communication device 1000, please refer to the description in the method embodiments shown above in this application for details, and will not be elaborated here.

[0485] Please refer to Figure 11 , which is another schematic structural diagram of the communication device 1100 provided by this application. The communication device 1100 includes a logic circuit 1101 and an input / output interface 1102. Among them, the communication device 1100 can be a chip or an integrated circuit.

[0486] Among them, Figure 10 the shown transceiver unit 1002 can be a communication interface, and this communication interface can be Figure 11 the input / output interface 1102 in

[0487] Optionally, the input / output interface 1102 is used to receive a reference signal, and this reference signal is sent through M digital ports, where M is a positive integer; among them, the first digital port among the M digital ports includes N 1 virtual ports, and N 1 is an integer greater than or equal to 1; the logic circuit 1101 is used to determine measurement information, and the input / output interface 1102 is also used to send the measurement information, and this measurement information includes the first information obtained by measuring based on the reference signal sent through the first digital port; among them, the first information is determined based on N 1 channel information, and the N 1 channel information is respectively determined by the reference signals sent through the N 1 virtual ports, and the first information is used to determine the weights of the N 1 virtual ports in the first digital port. Among them, the logic circuit 1101 and the input / output interface 1102 can also execute other steps performed by the terminal device in the foregoing embodiments and achieve corresponding beneficial effects, which will not be elaborated here.

[0488] Optionally, the logic circuit 1101 is used to determine a reference signal, and the input / output interface 1102 is used to send the reference signal, and this reference signal is sent through M digital ports, where M is a positive integer; among them, the first digital port among the M digital ports includes N 1 virtual ports, and N 1 is an integer greater than or equal to 1; the input / output interface 1102 is also used to receive measurement information, and this measurement information includes the first information obtained by measuring based on the reference signal sent through the first digital port; among them, the first information is determined based on N 1 channel information, and the N1 The channel information is determined by the reference signals sent through the N 1 virtual ports respectively. Among them, the logic circuit 1101 and the input / output interface 1102 can also perform other steps executed by the network device in the foregoing embodiments and achieve corresponding beneficial effects, which will not be elaborated here.

[0489] In a possible implementation manner, Figure 10 the processing unit 1001 shown can be Figure 11 the logic circuit 1101 in

[0490] Optionally, the logic circuit 1101 can be a processing device, and the functions of the processing device can be implemented partially or entirely by software. Among them, the functions of the processing device can be implemented partially or entirely by software.

[0491] Optionally, the processing device can include a memory and a processor. Among them, the memory is used to store computer programs, and the processor reads and executes the computer programs stored in the memory to perform the corresponding processing and / or steps in any method embodiment.

[0492] Optionally, the processing device can only include a processor. The memory for storing computer programs is located outside the processing device, and the processor is connected to the memory through a circuit / wire to read and execute the computer programs stored in the memory. Among them, the memory and the processor can be integrated together or physically independent of each other.

[0493] Optionally, the processing device can be one or more chips, or one or more integrated circuits. For example, the processing device can be one or more field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), system-on-chip (SoCs), central processing units (CPUs), network processors (NPs), digital signal processing circuits (DSPs), microcontroller units (MCUs), programmable logic devices (PLDs), or other integrated chips, or any combination of the above chips or processors, etc.

[0494] Please refer to Figure 12, the communication device 1200 involved in the above embodiments provided for the embodiments of the present application. The communication device 1200 may specifically be the communication device acting as a terminal device in the above embodiments. Figure 12 The example shown is implemented by the terminal device (or a component in the terminal device).

[0495] Among them, a possible schematic logical structure diagram of the communication device 1200. The communication device 1200 may include but is not limited to at least one processor 1201 and a communication port 1202.

[0496] Further optionally, the device may further include at least one of a memory 1203 and a bus 1204. In the embodiments of the present application, the at least one processor 1201 is used to control and process the actions of the communication device 1200.

[0497] In addition, the processor 1201 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in connection with the disclosure of the present application. The processor may also be a combination that implements computing functions, such as a combination including one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above may refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[0498] It should be noted that Figure 12 the communication device 1200 shown may specifically be used to implement the steps implemented by the terminal device in the foregoing method embodiments and achieve the corresponding technical effects of the terminal device. Figure 12 For the specific implementation manners of the communication device shown, reference may be made to the descriptions in the foregoing method embodiments, and details will not be repeated here.

[0499] Please refer to Figure 13 , a schematic structural diagram of the communication device 1300 involved in the above embodiments provided for the embodiments of the present application. The communication device 1300 may specifically be the communication device acting as a network device in the above embodiments. Figure 13 The example shown is implemented by the network device (or a component in the network device). Among them, the structure of the communication device may refer to Figure 13 the structure shown.

[0500] The communication device 1300 includes at least one processor 1311 and at least one network interface 1314. Further optionally, the communication device further includes at least one memory 1312, at least one transceiver 1313, and one or more antennas 1315. The processor 1311, the memory 1312, the transceiver 1313, and the network interface 1314 are connected, for example, by a bus. In the embodiments of the present application, this connection may include various interfaces, transmission lines, or buses, etc., and this embodiment does not limit this. The antenna 1315 is connected to the transceiver 1313. The network interface 1314 is used to enable the communication device to communicate with other communication devices through a communication link. For example, the network interface 1314 may include a network interface between the communication device and the core network device, such as the S1 interface. The network interface may include a network interface between the communication device and other communication devices (such as other network devices or core network devices), such as the X2 or Xn interface.

[0501] The processor 1311 is mainly used to process communication protocols and communication data, and to control the entire communication device, execute software programs, and process the data of software programs, for example, to support the communication device to perform the actions described in the embodiments. The communication device may include a baseband processor and a central processor. The baseband processor is mainly used to process communication protocols and communication data, and the central processor is mainly used to control the entire terminal device, execute software programs, and process the data of software programs. Figure 13 The processor 1311 in [description] may integrate the functions of the baseband processor and the central processor. Those skilled in the art can understand that the baseband processor and the central processor may also be independent processors, interconnected through technologies such as a bus. Those skilled in the art can understand that the terminal device may include multiple baseband processors to adapt to different network modes, the terminal device may include multiple central processors to enhance its processing ability, and various components of the terminal device may be connected through various buses. The baseband processor may also be referred to as a baseband processing circuit or a baseband processing chip. The central processor may also be referred to as a central processing circuit or a central processing chip. The function of processing communication protocols and communication data may be built into the processor or stored in the memory in the form of a software program, and the processor executes the software program to implement the baseband processing function.

[0502] The memory is mainly used to store software programs and data. The memory 1312 may exist independently and be connected to the processor 1311. Optionally, the memory 1312 may be integrated with the processor 1311, for example, integrated within one chip. Among them, the memory 1312 can store the program code for implementing the technical solutions of the embodiments of the present application and be controlled by the processor 1311 to execute. The various computer program codes being executed may also be regarded as the driver programs of the processor 1311.

[0503] Figure 13 Only one memory and one processor are shown. In an actual terminal device, there may be multiple processors and multiple memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be a storage element on the same chip as the processor, that is, an on-chip storage element, or an independent storage element, and the embodiments of the present application do not limit this.

[0504] The transceiver 1313 may be used to support the reception or transmission of radio frequency signals between the communication device and the terminal. The transceiver 1313 may be connected to the antenna 1315. The transceiver 1313 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 1315 may receive radio frequency signals. The receiver Rx of the transceiver 1313 is used to receive the radio frequency signals from the antenna, convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, and provide the digital baseband signals or digital intermediate frequency signals to the processor 1311 so that the processor 1311 can further process the digital baseband signals or digital intermediate frequency signals, such as demodulation processing and decoding processing. In addition, the transmitter Tx in the transceiver 1313 is also used to receive the modulated digital baseband signals or digital intermediate frequency signals from the processor 1311, convert the modulated digital baseband signals or digital intermediate frequency signals into radio frequency signals, and transmit the radio frequency signals through one or more antennas 1315. Specifically, the receiver Rx may selectively perform one-level or multi-level down-conversion processing and analog-to-digital conversion processing on the radio frequency signals to obtain digital baseband signals or digital intermediate frequency signals, and the sequence of the down-conversion processing and the analog-to-digital conversion processing is adjustable. The transmitter Tx may selectively perform one-level or multi-level up-conversion processing and digital-to-analog conversion processing on the modulated digital baseband signals or digital intermediate frequency signals to obtain radio frequency signals, and the sequence of the up-conversion processing and the digital-to-analog conversion processing is adjustable. The digital baseband signals and the digital intermediate frequency signals may be collectively referred to as digital signals.

[0505] The transceiver 1313 may also be referred to as a transceiver unit, a transceiver, a transceiver device, etc. Optionally, the devices used to implement the receiving function in the transceiver unit may be regarded as a receiving unit, and the devices used to implement the sending function in the transceiver unit may be regarded as a sending unit, that is, the transceiver unit includes a receiving unit and a sending unit. The receiving unit may also be referred to as a receiver, an input port, a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0506] It should be noted that Figure 13 The shown communication device 1300 may specifically be used to implement the steps implemented by the network device in the foregoing method embodiments and achieve the corresponding technical effects of the network device. Figure 13 For the specific implementation manners of the shown communication device 1300, reference may be made to the descriptions in the foregoing method embodiments, and details are not described herein again.

[0507] The embodiments of the present application further provide a computer-readable storage medium for storing one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the method described in the possible implementation manners of the communication device (such as a terminal device or a network device) in the foregoing embodiments.

[0508] The embodiments of the present application further provide a computer program product (or computer program). When the computer program product is executed by the processor, the processor executes the method of the possible implementation manners of the foregoing communication device (such as a terminal device or a network device).

[0509] The embodiments of the present application further provide a chip system. The chip system includes at least one processor for supporting the communication device to implement the functions involved in the possible implementation manners of the foregoing communication device. Optionally, the chip system further includes an interface circuit, and the interface circuit provides program instructions and / or data for the at least one processor. In a possible design, the chip system may further include a memory for storing the necessary program instructions and data of the communication device. The chip system may be composed of chips or may include chips and other discrete devices, where the communication device may specifically be the terminal device or the network device in the foregoing method embodiments.

[0510] The embodiments of the present application further provide a communication system. The network system architecture includes the terminal device and the network device in any of the foregoing embodiments.

[0511] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other may be indirect couplings or communication connections through some interfaces, devices, or units, and may be in electrical, mechanical, or other forms.

[0512] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0513] In addition, each functional unit in various embodiments of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of a software functional unit. If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that makes a contribution, or all or part of the technical solution, may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs that can store program codes.

Claims

1. A communication method, characterized in that, it includes: Receive a reference signal; wherein, the reference signal is respectively transmitted by L 1 first weights on L 1 time units, and L 1 is an integer greater than 1; the i-th first weight among the L 1 first weights is obtained by the i-th second weight among the L 1 second weights and a third weight, and the L 1 second weights are orthogonal, and the value of i ranges from 1 to L 1 ; sending measurement information, where the measurement information is obtained by measuring based on the reference signal.

2. A communication method, characterized in that, it includes: Transmit a reference signal; wherein, the reference signal is respectively transmitted by L 1 first weight values on L 1 time units, and L 1 is an integer greater than 1; the i-th first weight value among the L 1 first weight values is obtained by the i-th second weight value among L 1 second weight values and a third weight value, and the L 1 first weight values are orthogonal, and the value of i ranges from 1 to L 1 ; receiving measurement information, where the measurement information is obtained based on the reference signal.

3. The method according to claim 1 or 2, characterized in that, the reference signal is sent through M digital ports, where M is a positive integer; Among them, the weight of the first digital port among the M digital ports corresponding to the L 1 time units is the L 1 first weights; the first digital port includes N 1 virtual ports, and the second weight includes N 1 elements corresponding to the N 1 virtual ports, and N 1 is an integer greater than or equal to 1.

4. The method according to claim 3, characterized in that, The N 1 virtual ports respectively correspond to N 1 antenna element sets, each of the antenna element sets includes one or more antenna elements, and the N 1 elements are respectively used to adjust the phases of the N 1 antenna element sets.

5. The method according to claim 4, characterized in that, The third weight value includes N 1 sub-vectors, and the dimension of the P-th sub-vector among the N 1 sub-vectors is the same as the number of antenna elements in the P-th antenna element set among the N 1 antenna element sets, where the value range of P is from 1 to N 1 .

6. The method according to any one of claims 3 to 5, characterized in that, The measurement information includes first information obtained by measuring based on a reference signal transmitted through the first digital port; wherein, the first information is determined based on N 1 channel information, and the N 1 channel information is respectively determined by reference signals transmitted through the N 1 virtual ports, and the first information is used to determine weights of the N 1 virtual ports in the first digital port.

7. The method according to any one of claims 1 to 6, characterized in that, the dimension of the first weight value is the same as that of the third weight value.

8. The method according to any one of claims 1 to 7, characterized in that, The said L 1 The i-th first weight among the said L 1 first weights is obtained from the i-th second weight among the 1 second weights and a third weight, and includes: The $L$ 1 -th first weight, where $i$ ranges from $1$ to $L$, is obtained by multiplying each of the $N$ 1 elements of the $i$-th second weight among the $L$ 1 second weights by the $N$ 1 sub-vectors of the third weight, respectively.

9. The method according to any one of claims 3 to 8, characterized in that, M takes the value of 1.

10. The method according to any one of claims 3 to 8, characterized in that, M takes a value greater than 1.

11. The method according to claim 10, characterized in that, the resources of the reference signal satisfy one of the following: In the resources of the reference signal, the time-domain resources and frequency-domain resources for sending the reference signal by different digital ports among the M digital ports are the same, and different digital ports among the M digital ports are code-division multiplexed; In the resources of the reference signal, the time-domain resources for sending the reference signal by different digital ports among the M digital ports are the same, and the frequency-domain resources for sending the reference signal by different digital ports among the M digital ports are different; In the resources of the reference signal, the M digital ports belong to Q groups of digital ports, each group of digital ports includes one or more digital ports, and Q is a positive integer; among them, the frequency-domain resources for sending the reference signal by different groups of digital ports among the Q groups of digital ports are different, the frequency-domain resources for sending the reference signal by one or more digital ports included in the same group of digital ports among the Q groups of digital ports are the same, and one or more digital ports included in the same group of digital ports are code-division multiplexed.

12. The method according to claim 10 or 11, characterized in that, The second digital port among the M digital ports includes N 2 virtual ports; Among them, the reference signal is respectively transmitted by L 2 fourth weights over L 2 time units, where L 2 is an integer greater than 1; the j-th fourth weight among the L 2 fourth weights is obtained by the j-th fifth weight among L 2 fifth weights and a sixth weight, and the L 2 fifth weights are orthogonal.

13. The method according to any one of claims 10 to 12, characterized in that, In the resources of the reference signal, when the time-domain resources and frequency-domain resources for sending the reference signal by different digital ports among the M digital ports are the same and different digital ports are code-division multiplexed, the resources for sending the reference signal by different digital ports among the M digital ports all include the same M frequency-domain units in the frequency domain; or, In the resources of the reference signal, the time-domain resources for transmitting the reference signal by different digital ports among the M digital ports are the same, the frequency-domain resources for transmitting the reference signal by different digital ports among the M digital ports are different, and when there is no code division multiplexing among different digital ports among the M digital ports, the resources for transmitting the reference signal by different digital ports among the M digital ports include M different frequency-domain units in the frequency domain.

14. The method according to any one of claims 3 to 13, characterized in that the measurement information satisfies at least one of the following: the measurement information is the measurement information corresponding to a first carrier, and the measurement information is used to determine a first weight vector for each of the M digital ports corresponding to the first carrier, and the first carrier includes one or more carriers; the measurement information is the measurement information corresponding to a first bandwidth part BWP, and the measurement information is used to determine a first weight vector for each of the M digital ports corresponding to the first BWP, and the first BWP includes one or more BWPs; the measurement information is the measurement information corresponding to a first bandwidth, and the measurement information is used to determine a first weight vector for each of the M digital ports corresponding to the first bandwidth, and the first bandwidth includes one or more subbands.

15. A communication device, characterized in that it includes a module for executing the method according to any one of claims 1 to 14.

16. A communication device, characterized in that it includes at least one processor, and the at least one processor is coupled to a memory; the at least one processor is used to execute the method according to any one of claims 1 to 14.

17. The communication device according to claim 16, characterized in that the communication device is a chip or a chip system.

18. A readable storage medium, characterized in that the storage medium stores a computer program or instruction, and when the computer program or instruction is executed by a communication device, the method according to any one of claims 1 to 14 is implemented.

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