Channel information feedback method and communication device

Abstract

The present application provides a channel information feedback method and a communication device to enable reporting CSI from limited physical uplink resources. The method comprises: when physical uplink resources are insufficient, a terminal device selects B complex coefficients from K complex coefficients according to a preset priority rule and provides feedback, wherein K is a quantity of complex coefficients allowed to be feedbacked by the terminal device, and the preset priority rule is related to: an index value of each complex coefficient among K complex coefficients, an index value of a reference signal port corresponding to each complex coefficient of K complex coefficients among S reference signal ports, and at least one of the index values ​​of each complex coefficient among K complex coefficients among a plurality of complex coefficients allowed to be selected for the corresponding reference signal port, S is a quantity of reference signal ports allowed to be selected by the terminal device during CSI feedback, and K, B, and S are all positive integers.

Description

Technology Field

[0001] This application claims priority to Chinese Patent Application No. 202011459381.1, filed with the Chinese Intellectual Property Office on December 11, 2020, titled "Channel Information Feedback Method and Communication Device," the contents of which are incorporated herein in their entirety by reference.

[0002] The present application relates to the field of wireless communication, and more specifically to a channel information feedback method and a communication device. Background Technology

[0003] In massive multiple-input multiple-output (Massive MIMO) technology, network devices can use precoding techniques to reduce interference between multiple users and interference between multiple signal streams of the same user in order to improve signal quality, achieve spatial multiplexing, and improve spectrum utilization.

[0004] For example, since the terminal device determines a precoding vector expected to adapt to the downlink channel and provide feedback through channel measurement, the network device can obtain a precoding vector that is identical to or close to the precoding vector determined by the terminal device. In some communication technologies, such as Frequency Division Duplex (FDD), partial reciprocity exists between the uplink and downlink channels. The network device can obtain reciprocity information, such as the delay and angle of the downlink channel, through estimation of the uplink channel. Based on the delay and angle, the network device precodes the downlink reference signal and transmits the downlink reference signal, thereby reducing the feedback overhead of the terminal device.

[0005] However, in some cases, sufficient uplink resources may not be allocated to the terminal device to report channel state information (CSI). In this situation, a technical problem that urgently needs to be solved is how to maximize the utilization of limited physical uplink resources for CSI reporting without increasing the complexity of the terminal device.

[0006] The present application provides a channel information feedback method for reporting CSI using limited physical uplink resources.

[0007] According to a first aspect, a channel information feedback method is provided. The method may be performed by a terminal device or by a component configured in the terminal device (e.g., a circuit, a chip, or a chip system). This is not limited to the present application.

[0008] Specifically, the method comprises: a step of generating first indication information; wherein the first indication information is determined based on a received precoded reference signal, the precoded reference signal corresponds to P reference signal ports, the first indication information indicates B complex coefficients, the B complex coefficients are determined from K complex coefficients according to a preset priority rule, the K complex coefficients are determined from a set of complex coefficients, the set of complex coefficients is determined at each transport layer of Z transport layers and also corresponds to the p-th reference signal port among the P reference signal ports. pIt includes complex coefficients, p = 0, 1, ..., P-1, and the K complex coefficients correspond to S of the P reference signal ports, and the preset priority rule is as follows: the index value of each complex coefficient in the K complex coefficients, the index value of the reference signal port corresponding to each complex coefficient of the K complex coefficients in the S reference signal ports, and related to at least one of the index values ​​of each complex coefficient in the K complex coefficients among a plurality of complex coefficients allowed to be selected for the corresponding reference signal ports, and P, B, K, S, Z, and T p All are positive integers, B≤K and S≤P -; and includes the step of transmitting first instruction information.

[0009] Referring to the first aspect, in some possible implementations of the first aspect, a preset priority rule is Satisfying, And, is the first among the K complex coefficients k Indicates the priority of complex coefficients, is determined based on K complex coefficients k complex Indicates the index value of the coefficient, am.

[0010] In one example, is determined by the descending order of the amplitudes of the K complex coefficients k It can represent the index values ​​of complex coefficients. The smaller the k It indicates that complex coefficients have higher priority. Alternatively, is determined by the ascending order of the amplitudes of the K complex coefficients k It can represent the index values ​​of complex coefficients. The larger the lower the k It indicates that the complex coefficient has higher priority.

[0011] Referring to the first aspect, in some possible implementations of the first aspect, a preset priority rule is Satisfying, And, is the first of S reference signal ports s Indicates the priority of complex coefficients corresponding to the reference signal port, is determined based on K complex coefficients s Indicates the index value of the reference signal port, am.

[0012] In this implementation, among the K complex coefficients, multiple complex coefficients are the s When corresponding to a reference signal port, multiple complex coefficients can be understood to have the same priority.

[0013] Referring to the first aspect, in some possible implementations of the first aspect, T0= T1=...= T P-1 = T ≥ 2, K complex coefficients are determined based on U complex coefficients corresponding to each reference signal port of S reference signal ports in each of the Z transport layers, and the preset priority rule is Satisfying, , is, is the first of S reference signal ports s Corresponding to the reference signal port, also s The one on the reference signal port u s Indicates the priority of complex coefficients, is determined based on K complex coefficients s Indicates the index value of the reference signal port, And, is my s While being on the reference signal port, also the [number] among the K complex coefficients s The one determined based on the complex coefficients corresponding to the reference signal port u s Represents the index value of the complex coefficient, And, U is a positive integer, U ≤ T, and K ≤ S×U×Z.

[0014] In this implementation, there are K complex coefficients and also the s The reference signal port corresponding to the u s If complex coefficients exist in multiple transport layers, then the second on the s-th reference signal port in the multiple transport layers u s It can be understood that complex coefficients have the same priority.

[0015] Referring to the first aspect, in some possible implementations of the first aspect, T0= T1= ...= T P-1 = T ≥ 2, K complex coefficients are determined based on U complex coefficients corresponding to each reference signal port of S reference signal ports in each of the Z transport layers, and the preset priority rule is Satisfying, , is, is the first of S reference signal ports s Corresponding to the reference signal port, also s The one on the reference signal port u s Indicates the priority of complex coefficients, is determined based on K complex coefficients s Indicates the index value of the reference signal port, And, is my s While being on the reference signal port, also the [number] among the K complex coefficients s The one determined based on the complex coefficients corresponding to the reference signal port u s Indicates the index value of the complex coefficient, And, U is a positive integer, U ≤ T, and K ≤ S×U×Z.

[0016] In this implementation, there are K complex coefficients and also the s The reference signal port corresponding to the u s If complex coefficients exist in multiple transport layers, then in multiple transport layers s The reference signal port's u s It can be understood that complex coefficients have the same priority.

[0017] With reference to the first aspect, in some possible implementations of the first aspect, Is s It is a monotonically increasing function related to, and among S reference signal ports, the s The smaller the sequence number of the reference signal port, the more the s Indicating that the complex coefficient corresponding to the reference signal port has a higher priority; or Is s It is a monotonically decreasing function related to, and among S reference signal ports, the s The larger the sequence number of the reference signal port, the more s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0018] With reference to the first aspect, in some possible implementations of the first aspect, Is s It is a monotonically increasing function related to, and the s The reference signal port corresponding to the u The priority of complex coefficients is ( s +1) The one corresponding to the reference signal port u It has a higher priority than complex coefficients, and s The reference signal port corresponding to the u The complex coefficients are s The index value on the reference signal port u It is a complex coefficient, and the ( s +1) The one corresponding to the reference signal port uThe complex coefficients are the ( s +1) The index value on the reference signal port u It is a complex coefficient; or Is s It is a monotonically decreasing function related to, and the s The reference signal port corresponding to the u The priority of complex coefficients is ( s +1) The one corresponding to the reference signal port u It has a lower priority than complex coefficients.

[0019] With reference to the first aspect, in some possible implementations of the first aspect, is determined by the descending order of the amplitudes of the K complex coefficients s Indicates the index value of the reference signal port. The smaller the value, the higher the priority of the complex coefficient corresponding to the s-th reference signal port. Alternatively, is determined by the ascending order of the amplitudes of the K complex coefficients s Indicates the index value of the reference signal port. The larger the size, the more s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0020] With reference to the first aspect, in some possible implementations of the first aspect, Is u s It is a monotonically increasing function related to, and the s At the reference signal port, u s The smaller the sequence number, the more the corresponding u s Indicating that the complex coefficient has higher priority; or Is u s It is a monotonically decreasing function related to, and the s At the reference signal port, u s The larger the sequence number, the more the corresponding u s It indicates that the complex coefficient has higher priority.

[0021] Referring to the first aspect, in some possible implementations of the first aspect, a preset priority rule is additionally associated with a quantity Z of the transport layer, where Z is a positive integer.

[0022] Referring to the first aspect, in some possible implementations of the first aspect, the priority rule is Satisfying, , , is, K z represents the quantity of complex coefficients in the z-th transmission layer among the Z transmission layers, and is K at the z-th transport layer z Among the complex coefficients, the k z Indicates the priority of complex coefficients, is in the z-th transport layer and also K in the z-th transport layer z The one determined based on complex coefficients k z Represents the index value of the complex coefficient, am.

[0023] Referring to the first aspect, in some possible implementations of the first aspect, the priority rule is Satisfying, , is, is among the S reference signal ports in the z-th transport layer of the Z transport layers s z Indicates the priority of complex coefficients corresponding to the reference signal port, is in the z-th transport layer and also K z The one determined based on complex coefficients s z Indicates the index value of the reference signal port, and is, K z represents the quantity of complex coefficients in the z-th transmission layer, and am.

[0024] Referring to the first aspect, in some possible implementations of the first aspect, T0= T1= ...= T P-1 = T ≥ 2, K complex coefficients are determined based on U complex coefficients corresponding to each reference signal port of S reference signal ports in each of the Z transport layers, and the priority rule is Satisfying, , , is, is among the S reference signal ports in the z-th transport layer of the Z transport layers s z The reference signal port's u s,z Indicates the priority of complex coefficients, is in the z-th transport layer and also K z The one determined based on complex coefficients s z Indicates the index value of the reference signal port, Igo, K z represents the quantity of complex coefficients in the z-th transport layer, and And, is K z Among the complex coefficients, the z-th in the transmission layer s z The one determined based on the complex coefficients corresponding to the reference signal port u s,z Represents the index value of the complex coefficient, And, U is a positive integer, U ≤ T, and K ≤ S×U×Z.

[0025] Referring to the first aspect, in some possible implementations of the first aspect, T0= T1= ...T P-1 = T ≥ 2, K complex coefficients are determined based on U complex coefficients corresponding to each reference signal port of S reference signal ports in each of the Z transport layers, and the priority rule is Satisfying, , , is, is among the S reference signal ports in the z-th transport layer of the Z transport layers s z The reference signal port's u s,z Indicates the priority of complex coefficients, is in the z-th transport layer and also K z The one determined based on complex coefficients s z Indicates the index value of the reference signal port, Igo, K z represents the quantity of complex coefficients in the z-th transport layer, and And, is K z Among the complex coefficients, the z-th in the transmission layer s z The one determined based on the complex coefficients corresponding to the reference signal port u s,z Represents the index value of the complex coefficient, And, U is a positive integer, and U ≤ T, K ≤ S×U×Z.

[0026] With reference to the first aspect, in some possible implementations of the first aspect, Is s z It is a monotonically increasing function related to, and in the z-th transport layer, the s z The priority of the complex coefficients corresponding to the reference signal port is the ( s z +1) Higher than the priority of the complex coefficient corresponding to the reference signal port; or Is s z It is a monotonically decreasing function related to, and in the z-th transport layer, the s z The priority of the complex coefficients corresponding to the reference signal port is the ( s z +1) It has a higher priority than the complex coefficient corresponding to the reference signal port.

[0027] With reference to the first aspect, in some possible implementations of the first aspect, Is s z It is a monotonically increasing function related to, and in the z-th transport layer, the s z The reference signal port corresponding to the u The priority of complex coefficients is ( s z +1) The one corresponding to the reference signal port u It has a higher priority than complex coefficients, and s z The reference signal port corresponding to the u The complex coefficients are s z The index value on the reference signal port u It is a complex coefficient, and the ( s z +1) The one corresponding to the reference signal port u The complex coefficients are the ( s z +1) The index value on the reference signal port u It is a complex coefficient; or Is s z It is a monotonically decreasing function related to, and in the z-th transport layer, the s z The reference signal port corresponding to the u The priority of complex coefficients is ( s z +1) The one corresponding to the reference signal port u It has a lower priority than complex coefficients.

[0028] With reference to the first aspect, in some possible implementations of the first aspect, is K z In the z-th transmission layer, determined by the descending order of the amplitudes of the complex coefficients s z Indicates the index value of the reference signal port. The smaller the value, the more important it is in the transmission layer. s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. Alternatively, is K z In the z-th transmission layer, determined by the ascending order of the amplitudes of the complex coefficients s z Indicates the index value of the reference signal port. The larger the value, the more important it is in the transmission layer. s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0029] With reference to the first aspect, in some possible implementations of the first aspect, Is u s,z It is a monotonically increasing function related to, and the z-th of the transport layer s z At the reference signal port, u s,z The smaller the sequence number, the more the corresponding u s,z Indicating that the complex coefficient has higher priority; or Is u s,z It is a monotonically decreasing function related to, and the z-th of the transport layer s z At the reference signal port, u s,z The larger the sequence number, the more the corresponding u s,z It indicates that the complex coefficient has higher priority.

[0030] Referring to the first aspect, in some possible implementations of the first aspect, T p = 1, and T corresponding to the p-th reference signal port p The complex coefficients correspond to one angle-delay pair, and the reference signal precoding of the p-th reference signal port is determined by one angle-delay pair.

[0031] Referring to the first aspect, in some possible implementations of the first aspect, Tp = 1, and T corresponding to the p-th reference signal port p The complex coefficients correspond to one angle-delay pair, and the reference signal precoding of the p-th reference signal port is determined by one angle vector, and the method further includes the step of receiving second instruction information, and the second instruction information indicates a delay vector corresponding to the p-th reference signal port.

[0032] Referring to the first aspect, in some possible implementations of the first aspect, T0= T1= ...= T P-1 = T ≥ 2, and the T complex coefficients corresponding to the p-th reference signal port correspond to one angle-delay pair, and the T complex coefficients corresponding to the p-th reference signal port correspond to T different delay positions, and among the K complex coefficients, the k The complex coefficients are k It is one of T complex coefficients corresponding to the reference signal port corresponding to the complex coefficient, and k = 0, 1, ..., K-1.

[0033] With reference to the first aspect, in some possible implementations of the first aspect, the k The complex coefficients are k It has the largest amplitude among the T complex coefficients corresponding to the reference signal port corresponding to the complex coefficient.

[0034] Referring to the first aspect, in some possible implementation of the first aspect, the method further comprises the step of receiving third instruction information, wherein the third instruction information indicates T different delay positions.

[0035] Referring to the first aspect, in some possible implementation of the first aspect, the method further comprises the step of transmitting fourth instruction information, wherein the fourth instruction information indicates a delay position corresponding to each of the K complex coefficients.

[0036] Referring to the first aspect, in some possible implementations of the first aspect, Tp T ≥ 1 and corresponding to the p-th reference signal port p The complex coefficients are T p Corresponding to angle-delay pairs, the reference signal precoding of the p-th reference signal port is determined by a single angle vector; the method further comprises the step of receiving fifth instruction information, and the fifth instruction information corresponds to T corresponding to the p-th reference signal port. p Indicates the delay vector.

[0037] Referring to the first aspect, in some possible implementations of the first aspect, T0= T1= ...= T P-1 = T ≥ 2, and T complex coefficients corresponding to the p-th reference signal port correspond to T angle-delay pairs, and the reference signal precoding of the p-th reference signal port is determined by T angle-delay pairs corresponding to the p-th reference signal port, and K complex coefficients are determined based on U complex coefficients corresponding to each of the S reference signal ports, where U is a positive integer, U ≤ T, and K ≤ S×U×Z.

[0038] Referring to the first aspect, in some possible implementations of the first aspect, T0= T1= ...= T P-1 = T ≥ 2, and the reference signal precoding of the p-th reference signal port is M p Determined by angle-delay pairs, T corresponding to the p-th reference signal port p Among the complex coefficients, M p The complex coefficients are M p Corresponding to angle-delay pairs, and T p Among the complex coefficients, T p -M p The complex coefficients are determined by searching within a preset delay range, and M p is a positive integer, and M p ≤ T p am.

[0039] Referring to the first aspect, in some possible implementation of the first aspect, the method further comprises the step of receiving sixth instruction information, wherein the sixth instruction information indicates a preset delay range and / or search delay granularity.

[0040] Referring to the first aspect, in some possible implementation of the first aspect, the method further comprises the step of transmitting seventh instruction information, wherein the seventh instruction information indicates a delay position corresponding to each of the K complex coefficients.

[0041] According to a second aspect, a channel information feedback method is provided. The method may be performed by a network device or by a component configured in the network device (e.g., a circuit, a chip, or a chip system). This is not limited to the present application.

[0042] Specifically, the method comprises: receiving first instruction information; wherein the first instruction information is determined based on a precoded reference signal, the precoded reference signal corresponds to P reference signal ports, the first instruction information indicates B complex coefficients, the B complex coefficients are determined from K complex coefficients according to a preset priority rule, the K complex coefficients are determined from a set of complex coefficients, and the set of complex coefficients is determined at each of Z transmission layers and also corresponds to the p-th reference signal port among the P reference signal ports. pIt includes complex coefficients, p = 0, 1, ..., P-1, and the K complex coefficients correspond to S of the P reference signal ports, and the preset priority rule is as follows: the index value of each complex coefficient in the K complex coefficients, the index value of the reference signal port corresponding to each complex coefficient of the K complex coefficients in the S reference signal ports, and related to at least one of the index values ​​of each complex coefficient in the K complex coefficients among a plurality of complex coefficients allowed to be selected for the corresponding reference signal ports, and P, B, K, S, Z, and T p All are positive integers, B≤K and S≤P -; and includes the step of determining a precoding matrix based on first instruction information.

[0043] Based on the technical solution described above, when the reporting resources of the terminal device are limited, the terminal device can report the calculated complex coefficients according to the aforementioned preset priority rules. Compared to the method of determining the priority of the reporting amount of CSI part 2 in existing technology, when the network device loads angle-delay pairs or angle vectors included in angle-delay pairs obtained based on uplink and downlink channel mutuality into the downlink reference signal port, there is no computational redundancy when the complex coefficients are reported according to the preset priority rules, thereby reducing the complexity of the terminal device.

[0044] Referring to the second aspect, in some possible implementations of the second aspect, a preset priority rule is Satisfying, And, is the first among the K complex coefficients k Indicates the priority of complex coefficients, is determined based on K complex coefficients k complex Indicates the index value of the coefficient, am.

[0045] In one example, is determined by the descending order of the amplitudes of the K complex coefficients k It can represent the index values ​​of complex coefficients. The smaller the size, the more k It indicates that complex coefficients have higher priority. Alternatively, is determined by the ascending order of the amplitudes of the K complex coefficients k It can represent the index values ​​of complex coefficients. The larger the size, the more k It indicates that the complex coefficient has higher priority.

[0046] Referring to the second aspect, in some possible implementations of the second aspect, a preset priority rule is Satisfying, And, is the first of S reference signal ports s Indicates the priority of complex coefficients corresponding to the reference signal port, is determined based on K complex coefficients s Indicates the index value of the reference signal port, am.

[0047] In this implementation, among the K complex coefficients, multiple complex coefficients are the s When corresponding to a reference signal port, multiple complex coefficients can be understood to have the same priority.

[0048] Referring to the second aspect, in some possible implementations of the second aspect, T0= T1=...= T P-1 = T ≥ 2, K complex coefficients are determined based on U complex coefficients corresponding to each reference signal port of S reference signal ports in each of the Z transport layers, and the preset priority rule is Satisfying, , is, is the first of S reference signal ports s Corresponding to the reference signal port, alsos The one on the reference signal port u s Indicates the priority of complex coefficients, is determined based on K complex coefficients s Indicates the index value of the reference signal port, And, is my s While being on the reference signal port, also the [number] among the K complex coefficients s The one determined based on the complex coefficients corresponding to the reference signal port u s Represents the index value of the complex coefficient, And, U is a positive integer, U ≤ T, and K ≤ S×U×Z.

[0049] In this implementation, there are K complex coefficients and also the s The reference signal port corresponding to the u s If complex coefficients exist in multiple transport layers, then the second on the s-th reference signal port in the multiple transport layers u s It can be understood that complex coefficients have the same priority.

[0050] Referring to the second aspect, in some possible implementations of the second aspect, T0= T1= ...= T P-1 = T ≥ 2, K complex coefficients are determined based on U complex coefficients corresponding to each reference signal port of S reference signal ports in each of the Z transport layers, and the preset priority rule is Satisfying, , is, is the first of S reference signal ports s Corresponding to the reference signal port and also located on the second reference signal port u s Indicates the priority of complex coefficients, is determined based on K complex coefficients sIndicates the index value of the reference signal port, And, is my s While being on the reference signal port, also the [number] among the K complex coefficients s The one determined based on the complex coefficients corresponding to the reference signal port u s Indicates the index value of the complex coefficient, And, U is a positive integer, U ≤ T, and K ≤ S×U×Z.

[0051] In this implementation, there are K complex coefficients and also the s The reference signal port corresponding to the u s If complex coefficients exist in multiple transport layers, then in multiple transport layers s The reference signal port's u s It can be understood that complex coefficients have the same priority.

[0052] With reference to the second aspect, in some possible implementations of the second aspect, Is s It is a monotonically increasing function related to, and among S reference signal ports, the s The smaller the sequence number of the reference signal port, the more the s Indicating that the complex coefficient corresponding to the reference signal port has a higher priority; or Is s It is a monotonically decreasing function related to, and among S reference signal ports, the s The larger the sequence number of the reference signal port, the more s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0053] With reference to the second aspect, in some possible implementations of the second aspect, Is s It is a monotonically increasing function related to, and the s The reference signal port corresponding to the u The priority of complex coefficients is (s +1) The one corresponding to the reference signal port u It has a higher priority than complex coefficients, and s The reference signal port corresponding to the u The complex coefficients are s The index value on the reference signal port u It is a complex coefficient, and the ( s +1) The one corresponding to the reference signal port u The complex coefficients are the ( s +1) The index value on the reference signal port u It is a complex coefficient; or Is s It is a monotonically decreasing function related to, and the s The reference signal port corresponding to the u The priority of complex coefficients is ( s +1) The one corresponding to the reference signal port u It has a lower priority than complex coefficients.

[0054] With reference to the second aspect, in some possible implementations of the second aspect, is determined by the descending order of the amplitudes of the K complex coefficients s Indicates the index value of the reference signal port. The smaller the value, the higher the priority of the complex coefficient corresponding to the s-th reference signal port. Alternatively, is determined by the ascending order of the amplitudes of the K complex coefficients s Indicates the index value of the reference signal port. The larger the size, the more s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0055] With reference to the second aspect, in some possible implementations of the second aspect, Is u s It is a monotonically increasing function related to, and the s At the reference signal port, u s The smaller the sequence number, the more the correspondingu s Indicating that the complex coefficient has higher priority; or Is u s It is a monotonically decreasing function related to, and the s At the reference signal port, u s The larger the sequence number, the more the corresponding u s It indicates that the complex coefficient has higher priority.

[0056] Referring to the second aspect, in some possible implementations of the second aspect, the preset priority rule is additionally associated with a quantity Z of the transport layer, where Z is a positive integer.

[0057] Referring to the second aspect, in some possible implementations of the second aspect, the priority rule is Satisfying, , , is, K z represents the quantity of complex coefficients in the z-th transmission layer among the Z transmission layers, and is K at the z-th transport layer z Among the complex coefficients, the k z Indicates the priority of complex coefficients, is in the z-th transport layer and also K in the z-th transport layer z The one determined based on complex coefficients k z Represents the index value of the complex coefficient, am.

[0058] Referring to the second aspect, in some possible implementations of the second aspect, the priority rule is Satisfying, , is, is among the S reference signal ports in the z-th transport layer of the Z transport layers s z Indicates the priority of complex coefficients corresponding to the reference signal port, is in the z-th transport layer and also K z The one determined based on complex coefficients s z Indicates the index value of the reference signal port, and is, K z represents the quantity of complex coefficients in the z-th transmission layer, and am.

[0059] Referring to the second aspect, in some possible implementations of the second aspect, T0= T1= ...= T P-1 = T ≥ 2, K complex coefficients are determined based on U complex coefficients corresponding to each reference signal port of S reference signal ports in each of the Z transport layers, and the priority rule is Satisfying, , , is, is among the S reference signal ports in the z-th transport layer of the Z transport layers s z The reference signal port's u s,z Indicates the priority of complex coefficients, is in the z-th transport layer and also K z The one determined based on complex coefficients s z Indicates the index value of the reference signal port, Igo, K z represents the quantity of complex coefficients in the z-th transport layer, and And, is K z Among the complex coefficients, the z-th in the transmission layer s z The one determined based on the complex coefficients corresponding to the reference signal port u s,z Represents the index value of the complex coefficient, And, U is a positive integer, U ≤ T, and K ≤ S×U×Z.

[0060] Referring to the second aspect, in some possible implementations of the second aspect, T0= T1= ...T P-1 = T ≥ 2, K complex coefficients are determined based on U complex coefficients corresponding to each reference signal port of S reference signal ports in each of the Z transport layers, and the priority rule is Satisfying, , , is, is among the S reference signal ports in the z-th transport layer of the Z transport layers s z The reference signal port's u s,z Indicates the priority of complex coefficients, is in the z-th transport layer and also K z The one determined based on complex coefficients s z Indicates the index value of the reference signal port, Igo, K z represents the quantity of complex coefficients in the z-th transport layer, and And, is K z Among the complex coefficients, the z-th in the transmission layer s z The one determined based on the complex coefficients corresponding to the reference signal port u s,z Represents the index value of the complex coefficient, And, U is a positive integer, and U ≤ T, K ≤ S×U×Z.

[0061] With reference to the second aspect, in some possible implementations of the second aspect, Is s z It is a monotonically increasing function related to, and in the z-th transport layer, the s z The priority of the complex coefficients corresponding to the reference signal port is the ( s z +1) Higher than the priority of the complex coefficient corresponding to the reference signal port; or Is s z It is a monotonically decreasing function related to, and in the z-th transport layer, the s z The priority of the complex coefficients corresponding to the reference signal port is the ( s z +1) It has a higher priority than the complex coefficient corresponding to the reference signal port.

[0062] With reference to the second aspect, in some possible implementations of the second aspect, Is s z It is a monotonically increasing function related to, and in the z-th transport layer, the s z The reference signal port corresponding to the u The priority of complex coefficients is ( s z +1) The one corresponding to the reference signal port u It has a higher priority than complex coefficients, and s z The reference signal port corresponding to the u The complex coefficients are s z The index value on the reference signal port u It is a complex coefficient, and the ( s z +1) The one corresponding to the reference signal port u The complex coefficients are the ( s z +1) The index value on the reference signal port u It is a complex coefficient; or Is s z It is a monotonically decreasing function related to, and in the z-th transport layer, the s z The reference signal port corresponding to the u The priority of complex coefficients is ( s z +1) The one corresponding to the reference signal port u It has a lower priority than complex coefficients.

[0063] With reference to the second aspect, in some possible implementations of the second aspect, is K z In the z-th transmission layer, determined by the descending order of the amplitudes of the complex coefficients s z Indicates the index value of the reference signal port. The smaller the value, the more important it is in the transmission layer. s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. Alternatively, is K z In the z-th transmission layer, determined by the ascending order of the amplitudes of the complex coefficients s z Indicates the index value of the reference signal port. The larger the value, the more important it is in the transmission layer. s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0064] With reference to the second aspect, in some possible implementations of the second aspect, Is u s,z It is a monotonically increasing function related to, and the z-th of the transport layer s z At the reference signal port, u s,z The smaller the sequence number, the more the corresponding u s,z Indicating that the complex coefficient has higher priority; or Is u s,z It is a monotonically decreasing function related to, and the z-th of the transport layer s z At the reference signal port, u s,z The larger the sequence number, the more the corresponding u s,z It indicates that the complex coefficient has higher priority.

[0065] Referring to the second aspect, in some possible implementations of the second aspect, T p = 1, and T corresponding to the p-th reference signal port p The complex coefficients correspond to one angle-delay pair, and the reference signal precoding of the p-th reference signal port is determined by one angle-delay pair.

[0066] Referring to the second aspect, in some possible implementations of the second aspect, T p = 1, and T corresponding to the p-th reference signal port p The complex coefficients correspond to one angle-delay pair, and the reference signal precoding of the p-th reference signal port is determined by one angle vector, and the method further includes the step of transmitting second instruction information, and the second instruction information indicates a delay vector corresponding to the p-th reference signal port.

[0067] Referring to the second aspect, in some possible implementations of the second aspect, T0= T1= ...= T P-1 = T ≥ 2, and the T complex coefficients corresponding to the p-th reference signal port correspond to one angle-delay pair, the T complex coefficients corresponding to the p-th reference signal port correspond to T different delay positions, and among the K complex coefficients, the k The complex coefficients are k It is one of T complex coefficients corresponding to the reference signal port corresponding to the complex coefficient, and k = 0, 1, ..., K-1.

[0068] With reference to the second aspect, in some possible implementations of the second aspect, the k The complex coefficients are k It has the largest amplitude among the T complex coefficients corresponding to the reference signal port corresponding to the complex coefficient.

[0069] Referring to the second aspect, in some possible implementation of the second aspect, the method further comprises the step of transmitting third instruction information, wherein the third instruction information indicates T different delay positions.

[0070] Referring to the second aspect, in some possible implementation of the second aspect, the method further comprises the step of receiving fourth instruction information, wherein the fourth instruction information indicates a delay position corresponding to each of the K complex coefficients.

[0071] Referring to the second aspect, in some possible implementations of the second aspect, T p T ≥ 1 and corresponding to the p-th reference signal port p The complex coefficients are T p Corresponding to angle-delay pairs, the reference signal precoding of the p-th reference signal port is determined by a single angle vector; the method further comprises the step of transmitting fifth instruction information, wherein the fifth instruction information corresponds to T corresponding to the p-th reference signal port p Indicates the delay vector.

[0072] Referring to the second aspect, in some possible implementations of the second aspect, T0= T1= ...= T P-1 = T ≥ 2, and T complex coefficients corresponding to the p-th reference signal port correspond to T angle-delay pairs, and the reference signal precoding of the p-th reference signal port is determined by T angle-delay pairs corresponding to the p-th reference signal port, and K complex coefficients are determined based on U complex coefficients corresponding to each of the S reference signal ports, where U is a positive integer, U ≤ T, and K ≤ S×U×Z.

[0073] Referring to the second aspect, in some possible implementations of the second aspect, T0= T1= ...= T P-1 = T ≥ 2, and the reference signal precoding of the p-th reference signal port is M p Determined by angle-delay pairs, T corresponding to the p-th reference signal port p Among the complex coefficients, M p The complex coefficients are M p Corresponding to angle-delay pairs, and Tp Among the complex coefficients, T p -M p The complex coefficients are determined by searching within a preset delay range, and M p is a positive integer, and M p ≤ T p am.

[0074] Referring to the second aspect, in some possible implementation of the second aspect, the method further comprises the step of transmitting sixth instruction information, wherein the sixth instruction information indicates a preset delay range and / or search delay granularity.

[0075] Referring to the second aspect, in some possible implementation of the second aspect, the method further comprises the step of receiving seventh instruction information, wherein the seventh instruction information indicates a delay position corresponding to each of the K complex coefficients.

[0076] According to a third aspect, a communication device comprising a transceiver unit and a processing unit is provided. The processing unit is configured to generate first instruction information, the first instruction information is determined based on a received precoded reference signal, the precoded reference signal corresponds to P reference signal ports, the first instruction information indicates B complex coefficients, the B complex coefficients are determined from K complex coefficients according to a preset priority rule, the K complex coefficients are determined from a set of complex coefficients, the set of complex coefficients is determined at each of Z transmission layers and also corresponds to the p-th reference signal port among the P reference signal ports. pIt includes complex coefficients, p = 0, 1, ..., P-1, and the K complex coefficients correspond to S of the P reference signal ports, and the preset priority rule is as follows: the index value of each complex coefficient in the K complex coefficients, the index value of the reference signal port corresponding to each complex coefficient of the K complex coefficients in the S reference signal ports, and related to at least one of the index values ​​of each complex coefficient in the K complex coefficients among a plurality of complex coefficients allowed to be selected for the corresponding reference signal ports, and P, B, K, S, Z, and T p All are positive integers, B≤K, and S≤P. The transceiver unit is configured to transmit first instruction information.

[0077] Referring to the third aspect, in some possible implementations of the third aspect, a preset priority rule is Satisfying, And, is the first among the K complex coefficients k Indicates the priority of complex coefficients, is determined based on K complex coefficients k complex Indicates the index value of the coefficient, am.

[0078] In one example, is determined by the descending order of the amplitudes of the K complex coefficients k It can represent the index values ​​of complex coefficients. The smaller the size, the more k It indicates that complex coefficients have higher priority. Alternatively, is determined by the ascending order of the amplitudes of the K complex coefficients k It can represent the index values ​​of complex coefficients. The larger the size, the more k It indicates that the complex coefficient has higher priority.

[0079] Referring to the third aspect, in some possible implementations of the third aspect, a preset priority rule is Satisfying, And, is the first of S reference signal ports s Indicates the priority of complex coefficients corresponding to the reference signal port, is determined based on K complex coefficients s Indicates the index value of the reference signal port, am.

[0080] Referring to the third aspect, in some possible implementations of the third aspect, T0= T1=...= T P-1 = T ≥ 2, K complex coefficients are determined based on U complex coefficients corresponding to each reference signal port of S reference signal ports in each of the Z transport layers, and the preset priority rule is Satisfying, , is, is the first of S reference signal ports s Corresponding to the reference signal port, also s The one on the reference signal port u s Indicates the priority of complex coefficients, is determined based on K complex coefficients s Indicates the index value of the reference signal port, And, is my s While being on the reference signal port, also the [number] among the K complex coefficients s The one determined based on the complex coefficients corresponding to the reference signal port u s Represents the index value of the complex coefficient, And, U is a positive integer, U ≤ T, and K ≤ S×U×Z.

[0081] Referring to the third aspect, in some possible implementations of the third aspect, T0= T1= ...= TP-1 = T ≥ 2, K complex coefficients are determined based on U complex coefficients corresponding to each reference signal port of S reference signal ports in each of the Z transport layers, and the preset priority rule is Satisfying, , is, is the first of S reference signal ports s Corresponding to the reference signal port and also located on the second reference signal port u s Indicates the priority of complex coefficients, is determined based on K complex coefficients s Indicates the index value of the reference signal port, And, is my s While being on the reference signal port, also the [number] among the K complex coefficients s The one determined based on the complex coefficients corresponding to the reference signal port u s Indicates the index value of the complex coefficient, And, U is a positive integer, U ≤ T, and K ≤ S×U×Z.

[0082] With reference to the third aspect, in some possible implementations of the third aspect, Is s It is a monotonically increasing function related to, and among S reference signal ports, the s The smaller the sequence number of the reference signal port, the more the s Indicating that the complex coefficient corresponding to the reference signal port has a higher priority; or Is s It is a monotonically decreasing function related to, and among S reference signal ports, the s The larger the sequence number of the reference signal port, the more s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0083] With reference to the third aspect, in some possible implementations of the third aspect, Is s It is a monotonically increasing function related to, and the s The reference signal port corresponding to the u The priority of complex coefficients is ( s +1) The one corresponding to the reference signal port u It has a higher priority than complex coefficients, and s The reference signal port corresponding to the u The complex coefficients are s The index value on the reference signal port u It is a complex coefficient, and the ( s +1) The one corresponding to the reference signal port u The complex coefficients are the ( s +1) The index value on the reference signal port u It is a complex coefficient; or Is s It is a monotonically decreasing function related to, and the s The reference signal port corresponding to the u The priority of complex coefficients is ( s +1) The one corresponding to the reference signal port u It has a lower priority than complex coefficients.

[0084] With reference to the third aspect, in some possible implementations of the third aspect, is determined by the descending order of the amplitudes of the K complex coefficients s Indicates the index value of the reference signal port. The smaller the value, the higher the priority of the complex coefficient corresponding to the s-th reference signal port. Alternatively, is determined by the ascending order of the amplitudes of the K complex coefficients s Indicates the index value of the reference signal port. The larger the size, the more s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0085] With reference to the third aspect, in some possible implementations of the third aspect, Is u s It is a monotonically increasing function related to, and the s At the reference signal port, u s The smaller the sequence number, the more the corresponding u s Indicating that the complex coefficient has higher priority; or Is u s It is a monotonically decreasing function related to, and the s At the reference signal port, u s The larger the sequence number, the more the corresponding u s It indicates that the complex coefficient has higher priority.

[0086] Referring to the third aspect, in some possible implementations of the third aspect, the preset priority rule is additionally associated with a quantity Z of the transport layer, where Z is a positive integer.

[0087] Referring to the third aspect, in some possible implementations of the third aspect, the priority rule is Satisfying, , , is, K z represents the quantity of complex coefficients in the z-th transmission layer among the Z transmission layers, and is K at the z-th transport layer z Among the complex coefficients, the k z Indicates the priority of complex coefficients, is in the z-th transport layer and also K in the z-th transport layer z The one determined based on complex coefficients k z Represents the index value of the complex coefficient, am.

[0088] Referring to the third aspect, in some possible implementations of the third aspect, the priority rule is Satisfying, , is, is among the S reference signal ports in the z-th transport layer of the Z transport layers s z Indicates the priority of complex coefficients corresponding to the reference signal port, is in the z-th transport layer and also K z The one determined based on complex coefficients s z Indicates the index value of the reference signal port, and is, K z represents the quantity of complex coefficients in the z-th transmission layer, and am.

[0089] Referring to the third aspect, in some possible implementations of the third aspect, T0= T1= ...= T P-1 = T ≥ 2, K complex coefficients are determined based on U complex coefficients corresponding to each reference signal port of S reference signal ports in each of the Z transport layers, and the priority rule is Satisfying, , , is, is among the S reference signal ports in the z-th transport layer of the Z transport layers s z The reference signal port's u s,z Indicates the priority of complex coefficients, is in the z-th transport layer and also K z The one determined based on complex coefficients s z Indicates the index value of the reference signal port, Igo, K z represents the quantity of complex coefficients in the z-th transport layer, and And, is K z Among the complex coefficients, the z-th in the transmission layer s z The one determined based on the complex coefficients corresponding to the reference signal port u s,z Represents the index value of the complex coefficient, And, U is a positive integer, U ≤ T, and K ≤ S×U×Z.

[0090] Referring to the third aspect, in some possible implementations of the third aspect, T0= T1= ...T P-1 = T ≥ 2, K complex coefficients are determined based on U complex coefficients corresponding to each reference signal port of S reference signal ports in each of the Z transport layers, and the priority rule is Satisfying, , , is, is among the S reference signal ports in the z-th transport layer of the Z transport layers s z The reference signal port's u s,z Indicates the priority of complex coefficients, is in the z-th transport layer and also K z The one determined based on complex coefficients s z Indicates the index value of the reference signal port, Igo, K z represents the quantity of complex coefficients in the z-th transport layer, and And, is K z Among the complex coefficients, the z-th in the transmission layer s z The one determined based on the complex coefficients corresponding to the reference signal port u s,z Represents the index value of the complex coefficient, And, U is a positive integer, and U ≤ T, K ≤ S×U×Z.

[0091] With reference to the third aspect, in some possible implementations of the third aspect, Iss z It is a monotonically increasing function related to, and in the z-th transport layer, the s z The priority of the complex coefficients corresponding to the reference signal port is the ( s z +1) Higher than the priority of the complex coefficient corresponding to the reference signal port; or Is s z It is a monotonically decreasing function related to, and in the z-th transport layer, the s z The priority of the complex coefficients corresponding to the reference signal port is the ( s z +1) It has a higher priority than the complex coefficient corresponding to the reference signal port.

[0092] With reference to the third aspect, in some possible implementations of the third aspect, Is s z It is a monotonically increasing function related to, and in the z-th transport layer, the s z The reference signal port corresponding to the u The priority of complex coefficients is ( s z +1) The one corresponding to the reference signal port u It has a higher priority than complex coefficients, and s z The reference signal port corresponding to the u The complex coefficients are s z The index value on the reference signal port u It is a complex coefficient, and the ( s z +1) The one corresponding to the reference signal port u The complex coefficients are the ( s z +1) The index value on the reference signal port u It is a complex coefficient; or Is s z It is a monotonically decreasing function related to, and in the z-th transport layer, thes z The reference signal port corresponding to the u The priority of complex coefficients is ( s z +1) The one corresponding to the reference signal port u It has a lower priority than complex coefficients.

[0093] With reference to the third aspect, in some possible implementations of the third aspect, is K z In the z-th transmission layer, determined by the descending order of the amplitudes of the complex coefficients s z Indicates the index value of the reference signal port. The smaller the value, the more important it is in the transmission layer. s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. Alternatively, is K z In the z-th transmission layer, determined by the ascending order of the amplitudes of the complex coefficients s z Indicates the index value of the reference signal port. The larger the value, the more important it is in the transmission layer. s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0094] With reference to the third aspect, in some possible implementations of the third aspect, Is u s,z It is a monotonically increasing function related to, and the z-th of the transport layer s z At the reference signal port, u s,z The smaller the sequence number, the more the corresponding u s,z Indicating that the complex coefficient has higher priority; or Is u s,z It is a monotonically decreasing function related to, and the z-th of the transport layer s z At the reference signal port, u s,z The larger the sequence number, the more the corresponding u s,z It indicates that the complex coefficient has higher priority.

[0095] Referring to the third aspect, in some possible implementations of the third aspect, T p = 1, and T corresponding to the p-th reference signal port p The complex coefficients correspond to one angle-delay pair, and the reference signal precoding of the p-th reference signal port is determined by one angle-delay pair.

[0096] Referring to the third aspect, in some possible implementations of the third aspect, T p = 1, and T corresponding to the p-th reference signal port p The complex coefficients correspond to a single angle-delay pair, and the reference signal precoding of the p-th reference signal port is determined by a single angle vector. The transceiver unit is further configured to transmit second instruction information, and the second instruction information indicates a delay vector corresponding to the p-th reference signal port.

[0097] Referring to the third aspect, in some possible implementations of the third aspect, T0= T1= ...= T P-1 = T ≥ 2, and the T complex coefficients corresponding to the p-th reference signal port correspond to one angle-delay pair, the T complex coefficients corresponding to the p-th reference signal port correspond to T different delay positions, and among the K complex coefficients, the k The complex coefficients are k It is one of T complex coefficients corresponding to the reference signal port corresponding to the complex coefficient, and k = 0, 1, ..., K-1.

[0098] With reference to the third aspect, in some possible implementations of the third aspect, the k The complex coefficients are kIt has the largest amplitude among the T complex coefficients corresponding to the reference signal port corresponding to the complex coefficient.

[0099] Referring to the third aspect, in some possible implementation of the third aspect, the transceiver unit is further configured to receive third instruction information, and the third instruction information indicates T different delay positions.

[0100] Referring to the third aspect, in some possible implementation of the third aspect, the transceiver unit is further configured to transmit fourth instruction information, and the fourth instruction information indicates a delay position corresponding to each of the K complex coefficients.

[0101] Referring to the third aspect, in some possible implementations of the third aspect, T p T ≥ 1 and corresponding to the p-th reference signal port p The complex coefficients are T p Corresponding to angle-delay pairs, the reference signal precoding of the p-th reference signal port is determined by a single angle vector. The transceiver unit is further configured to receive fifth instruction information, and the fifth instruction information corresponds to T corresponding to the p-th reference signal port. p Indicates the delay vector.

[0102] Referring to the third aspect, in some possible implementations of the third aspect, T0= T1= ...= T P-1 = T ≥ 2, and T complex coefficients corresponding to the p-th reference signal port correspond to T angle-delay pairs, and the reference signal precoding of the p-th reference signal port is determined by T angle-delay pairs corresponding to the p-th reference signal port, and K complex coefficients are determined based on U complex coefficients corresponding to each of the S reference signal ports, where U is a positive integer, U ≤ T, and K ≤ S×U×Z.

[0103] Referring to the third aspect, in some possible implementations of the third aspect, T0= T1= ...= T P-1= T ≥ 2, and the reference signal precoding of the p-th reference signal port is M p Determined by angle-delay pairs, T corresponding to the p-th reference signal port p Among the complex coefficients, M p The complex coefficients are M p Corresponding to angle-delay pairs, and T p Among the complex coefficients, T p -M p The complex coefficients are determined by searching within a preset delay range, and M p is a positive integer, and M p ≤ T p am.

[0104] Referring to the third aspect, in some possible implementation of the third aspect, the transceiver unit is further configured to receive sixth instruction information, and the sixth instruction information indicates a preset delay range and / or search delay granularity.

[0105] Referring to the third aspect, in some possible implementation of the third aspect, the transceiver unit is further configured to transmit seventh instruction information, and the seventh instruction information indicates a delay position corresponding to each of the K complex coefficients.

[0106] According to a fourth aspect, a communication device comprising a transceiver unit and a processing unit is provided. The transceiver unit is configured to receive first instruction information, the first instruction information is determined based on a precoded reference signal, the precoded reference signal corresponds to P reference signal ports, the first instruction information indicates B complex coefficients, the B complex coefficients are determined from K complex coefficients according to a preset priority rule, the K complex coefficients are determined from a set of complex coefficients, the set of complex coefficients is determined at each of Z transmission layers and also corresponds to the p-th reference signal port among the P reference signal ports. pIt includes complex coefficients, p = 0, 1, ..., P-1, and the K complex coefficients correspond to S of the P reference signal ports, and the preset priority rule is as follows: the index value of each complex coefficient in the K complex coefficients, the index value of the reference signal port corresponding to each complex coefficient of the K complex coefficients in the S reference signal ports, and related to at least one of the index values ​​of each complex coefficient in the K complex coefficients among a plurality of complex coefficients allowed to be selected for the corresponding reference signal ports, and P, B, K, S, Z, and T p All are positive integers, B≤K, and S≤P. The transceiver unit is configured to transmit first instruction information.

[0107] Referring to the fourth aspect, in some possible implementations of the fourth aspect, a preset priority rule is Satisfying, And, is the first among the K complex coefficients k Indicates the priority of complex coefficients, is determined based on K complex coefficients k complex Indicates the index value of the coefficient, am.

[0108] In one example, is determined by the descending order of the amplitudes of the K complex coefficients k It can represent the index values ​​of complex coefficients. The smaller the size, the more k It indicates that complex coefficients have higher priority. Alternatively, is determined by the ascending order of the amplitudes of the K complex coefficients k It can represent the index values ​​of complex coefficients. The larger the size, the more k It indicates that the complex coefficient has higher priority.

[0109] Referring to the fourth aspect, in some possible implementations of the fourth aspect, a preset priority rule is Satisfying, And, is the first of S reference signal ports s Indicates the priority of complex coefficients corresponding to the reference signal port, is determined based on K complex coefficients s Indicates the index value of the reference signal port, am.

[0110] Referring to the fourth aspect, in some possible implementations of the fourth aspect, T0= T1=...= T P-1 = T ≥ 2, K complex coefficients are determined based on U complex coefficients corresponding to each reference signal port of S reference signal ports in each of the Z transport layers, and the preset priority rule is Satisfying, , is, is the first of S reference signal ports s Corresponding to the reference signal port, also s The one on the reference signal port u s Indicates the priority of complex coefficients, is determined based on K complex coefficients s Indicates the index value of the reference signal port, And, is my s While being on the reference signal port, also the [number] among the K complex coefficients s The one determined based on the complex coefficients corresponding to the reference signal port u s Represents the index value of the complex coefficient, And, U is a positive integer, U ≤ T, and K ≤ S×U×Z.

[0111] Referring to the fourth aspect, in some possible implementations of the fourth aspect, T0= T1= ...= TP-1 = T ≥ 2, K complex coefficients are determined based on U complex coefficients corresponding to each reference signal port of S reference signal ports in each of the Z transport layers, and the preset priority rule is Satisfying, , is, is the first of S reference signal ports s Corresponding to the reference signal port and also located on the second reference signal port u s Indicates the priority of complex coefficients, is determined based on K complex coefficients s Indicates the index value of the reference signal port, And, is my s While being on the reference signal port, also the [number] among the K complex coefficients s The one determined based on the complex coefficients corresponding to the reference signal port u s Indicates the index value of the complex coefficient, And, U is a positive integer, U ≤ T, and K ≤ S×U×Z.

[0112] With reference to the fourth aspect, in some possible implementations of the fourth aspect, Is s It is a monotonically increasing function related to, and among S reference signal ports, the s The smaller the sequence number of the reference signal port, the more the s Indicating that the complex coefficient corresponding to the reference signal port has a higher priority; or Is s It is a monotonically decreasing function related to, and among S reference signal ports, the s The larger the sequence number of the reference signal port, the more s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0113] With reference to the fourth aspect, in some possible implementations of the fourth aspect, Is s It is a monotonically increasing function related to, and the s The reference signal port corresponding to the u The priority of complex coefficients is ( s +1) The one corresponding to the reference signal port u It has a higher priority than complex coefficients, and s The reference signal port corresponding to the u The complex coefficients are s The index value on the reference signal port u It is a complex coefficient, and the ( s +1) The one corresponding to the reference signal port u The complex coefficients are the ( s +1) The index value on the reference signal port u It is a complex coefficient; or Is s It is a monotonically decreasing function related to, and the s The reference signal port corresponding to the u The priority of complex coefficients is ( s +1) The one corresponding to the reference signal port u It has a lower priority than complex coefficients.

[0114] With reference to the fourth aspect, in some possible implementations of the fourth aspect, is determined by the descending order of the amplitudes of the K complex coefficients s Indicates the index value of the reference signal port. The smaller the value, the higher the priority of the complex coefficient corresponding to the s-th reference signal port. Alternatively, is determined by the ascending order of the amplitudes of the K complex coefficients s Indicates the index value of the reference signal port. The larger the size, the more s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0115] With reference to the fourth aspect, in some possible implementations of the fourth aspect, Is u s It is a monotonically increasing function related to, and the s At the reference signal port, u s The smaller the sequence number, the more the corresponding u s Indicating that the complex coefficient has higher priority; or Is u s It is a monotonically decreasing function related to, and the s At the reference signal port, u s The larger the sequence number, the more the corresponding u s It indicates that the complex coefficient has higher priority.

[0116] Referring to the fourth aspect, in some possible implementations of the fourth aspect, the preset priority rule is additionally associated with a quantity Z of the transport layer, where Z is a positive integer.

[0117] Referring to the fourth aspect, in some possible implementations of the fourth aspect, the priority rule is Satisfying, , , is, K z represents the quantity of complex coefficients in the z-th transmission layer among the Z transmission layers, and is K at the z-th transport layer z Among the complex coefficients, the k z Indicates the priority of complex coefficients, is in the z-th transport layer and also K in the z-th transport layer z The one determined based on complex coefficients k z Represents the index value of the complex coefficient, am.

[0118] Referring to the fourth aspect, in some possible implementations of the fourth aspect, the priority rule is Satisfying, , is, is among the S reference signal ports in the z-th transport layer of the Z transport layers s z Indicates the priority of complex coefficients corresponding to the reference signal port, is in the z-th transport layer and also K z The one determined based on complex coefficients s z Indicates the index value of the reference signal port, and is, K z represents the quantity of complex coefficients in the z-th transmission layer, and am.

[0119] Referring to the fourth aspect, in some possible implementations of the fourth aspect, T0= T1= ...= T P-1 = T ≥ 2, K complex coefficients are determined based on U complex coefficients corresponding to each reference signal port of S reference signal ports in each of the Z transport layers, and the priority rule is Satisfying, , , is, is among the S reference signal ports in the z-th transport layer of the Z transport layers s z The reference signal port's u s,z Indicates the priority of complex coefficients, is in the z-th transport layer and also K z The one determined based on complex coefficients s z Indicates the index value of the reference signal port, Igo, K z represents the quantity of complex coefficients in the z-th transport layer, and And, is K z Among the complex coefficients, the z-th in the transmission layer s z The one determined based on the complex coefficients corresponding to the reference signal port u s,z Represents the index value of the complex coefficient, And, U is a positive integer, U ≤ T, and K ≤ S×U×Z.

[0120] Referring to the fourth aspect, in some possible implementations of the fourth aspect, T0= T1= ...T P-1 = T ≥ 2, K complex coefficients are determined based on U complex coefficients corresponding to each reference signal port of S reference signal ports in each of the Z transport layers, and the priority rule is Satisfying, , , is, is among the S reference signal ports in the z-th transport layer of the Z transport layers s z The reference signal port's u s,z Indicates the priority of complex coefficients, is in the z-th transport layer and also K z The one determined based on complex coefficients s z Indicates the index value of the reference signal port, Igo, K z represents the quantity of complex coefficients in the z-th transport layer, and And, is K z Among the complex coefficients, the z-th in the transmission layer s z The one determined based on the complex coefficients corresponding to the reference signal port u s,z Represents the index value of the complex coefficient, And, U is a positive integer, and U ≤ T, K ≤ S×U×Z.

[0121] With reference to the fourth aspect, in some possible implementations of the fourth aspect, Iss z It is a monotonically increasing function related to, and in the z-th transport layer, the s z The priority of the complex coefficients corresponding to the reference signal port is the ( s z +1) Higher than the priority of the complex coefficient corresponding to the reference signal port; or Is s z It is a monotonically decreasing function related to, and in the z-th transport layer, the s z The priority of the complex coefficients corresponding to the reference signal port is the ( s z +1) It has a higher priority than the complex coefficient corresponding to the reference signal port.

[0122] With reference to the fourth aspect, in some possible implementations of the fourth aspect, Is s z It is a monotonically increasing function related to, and in the z-th transport layer, the s z The reference signal port corresponding to the u The priority of complex coefficients is ( s z +1) The one corresponding to the reference signal port u It has a higher priority than complex coefficients, and s z The reference signal port corresponding to the u The complex coefficients are s z The index value on the reference signal port u It is a complex coefficient, and the ( s z +1) The one corresponding to the reference signal port u The complex coefficients are the ( s z +1) The index value on the reference signal port u It is a complex coefficient; or Is s z It is a monotonically decreasing function related to, and in the z-th transport layer, thes z The reference signal port corresponding to the u The priority of complex coefficients is ( s z +1) The one corresponding to the reference signal port u It has a lower priority than complex coefficients.

[0123] With reference to the fourth aspect, in some possible implementations of the fourth aspect, is K z In the z-th transmission layer, determined by the descending order of the amplitudes of the complex coefficients s z Indicates the index value of the reference signal port. The smaller the value, the more important it is in the transmission layer. s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. Alternatively, is K z In the z-th transmission layer, determined by the ascending order of the amplitudes of the complex coefficients s z Indicates the index value of the reference signal port. The larger the value, the more important it is in the transmission layer. s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0124] With reference to the fourth aspect, in some possible implementations of the fourth aspect, Is u s,z It is a monotonically increasing function related to, and the z-th of the transport layer s z At the reference signal port, u s,z The smaller the sequence number, the more the corresponding u s,z Indicating that the complex coefficient has higher priority; or Is u s,z It is a monotonically decreasing function related to, and the z-th of the transport layer s z At the reference signal port, u s,z The larger the sequence number, the more the corresponding u s,z It indicates that the complex coefficient has higher priority.

[0125] Referring to the fourth aspect, in some possible implementations of the fourth aspect, T p = 1, and T corresponding to the p-th reference signal port p The complex coefficients correspond to one angle-delay pair, and the reference signal precoding of the p-th reference signal port is determined by one angle-delay pair.

[0126] Referring to the fourth aspect, in some possible implementations of the fourth aspect, T p = 1, and T corresponding to the p-th reference signal port p The complex coefficients correspond to a single angle-delay pair, and the reference signal precoding of the p-th reference signal port is determined by a single angle vector. The transceiver unit is further configured to transmit second instruction information, and the second instruction information indicates a delay vector corresponding to the p-th reference signal port.

[0127] Referring to the fourth aspect, in some possible implementations of the fourth aspect, T0= T1= ...= T P-1 = T ≥ 2, and the T complex coefficients corresponding to the p-th reference signal port correspond to one angle-delay pair, the T complex coefficients corresponding to the p-th reference signal port correspond to T different delay positions, and among the K complex coefficients, the k The complex coefficients are k It is one of T complex coefficients corresponding to the reference signal port corresponding to the complex coefficient, and k = 0, 1, ..., K-1.

[0128] With reference to the fourth aspect, in some possible implementations of the fourth aspect, the k The complex coefficients are kIt has the largest amplitude among the T complex coefficients corresponding to the reference signal port corresponding to the complex coefficient.

[0129] Referring to the fourth aspect, in some possible implementation of the fourth aspect, the transceiver unit is further configured to transmit third instruction information, and the third instruction information indicates T different delay positions.

[0130] Referring to the fourth aspect, in some possible implementation of the fourth aspect, the transceiver unit is further configured to receive fourth instruction information, and the fourth instruction information indicates a delay position corresponding to each of the K complex coefficients.

[0131] Referring to the fourth aspect, in some possible implementations of the fourth aspect, T p T ≥ 1 and corresponding to the p-th reference signal port p The complex coefficients are T p Corresponding to angle-delay pairs, the reference signal precoding of the p-th reference signal port is determined by a single angle vector. The transceiver unit is further configured to transmit fifth instruction information, and the fifth instruction information corresponds to T corresponding to the p-th reference signal port. p Indicates the delay vector.

[0132] Referring to the fourth aspect, in some possible implementations of the fourth aspect, T0= T1= ...= T P-1 = T ≥ 2, and T complex coefficients corresponding to the p-th reference signal port correspond to T angle-delay pairs, and the reference signal precoding of the p-th reference signal port is determined by T angle-delay pairs corresponding to the p-th reference signal port, and K complex coefficients are determined based on U complex coefficients corresponding to each of the S reference signal ports, where U is a positive integer, U ≤ T, and K ≤ S×U×Z.

[0133] Referring to the fourth aspect, in some possible implementations of the fourth aspect, T0= T1= ...= T P-1= T ≥ 2, and the reference signal precoding of the p-th reference signal port is M p Determined by angle-delay pairs, T corresponding to the p-th reference signal port p Among the complex coefficients, M p The complex coefficients are M p Corresponding to angle-delay pairs, and T p Among the complex coefficients, T p -M p The complex coefficients are determined by searching within a preset delay range, and M p is a positive integer, and M p ≤ T p am.

[0134] Referring to the fourth aspect, in some possible implementation of the fourth aspect, the transceiver unit is further configured to transmit sixth instruction information, and the sixth instruction information indicates a preset delay range and / or search delay granularity.

[0135] Referring to the fourth aspect, in some possible implementation of the fourth aspect, the transceiver unit is further configured to receive seventh instruction information, and the seventh instruction information indicates a delay position corresponding to each of the K complex coefficients.

[0136] According to a fifth aspect, a communication device comprising a processor is provided. The processor may be coupled to memory and configured to execute instructions in memory to implement a method according to any one of the possible implementations of the first aspect. Optionally, the communication device further comprises memory. Optionally, the communication device further comprises a communication interface. The processor is coupled to the communication interface. The communication interface is configured to input and / or output information. The information includes at least one of instructions and data.

[0137] In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver or an input / output interface.

[0138] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0139] In another implementation, the communication device is a chip or chip system placed in the terminal device. When the communication device is a chip or chip system placed in the terminal device, the communication interface may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin, or an associated circuit, etc. The processor may otherwise be implemented as a processing circuit or a logic circuit.

[0140] According to a sixth aspect, a communication device is provided. The communication device includes a processor. The processor may be coupled to memory and configured to execute instructions in memory to implement a method according to any one of the possible implementations of the second aspect. Optionally, the communication device further includes memory. Optionally, the communication device further includes a communication interface. The processor is coupled to the communication interface. The communication interface is configured to input and / or output information. The information includes at least one of instructions and data.

[0141] In one implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver or an input / output interface.

[0142] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0143] In another implementation, the communication device is a chip or chip system placed in a network device. When the communication device is a chip or chip system placed in a network device, the communication interface may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin, or an associated circuit, etc. The processor may otherwise be implemented as a processing circuit or a logic circuit.

[0144] According to the seventh aspect, a processor is provided. The processor includes an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal using the input circuit and transmit a signal using the output circuit to enable the processor to perform a method according to either possible implementation of the first aspect and the second aspect.

[0145] In a specific implementation process, the processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, various logic circuits, etc. The input signal received by the input circuit may be received and input by, for example, a receiver, but is not limited thereto, and the signal output by the output circuit may be output to, for example, a transmitter and transmitted by the transmitter, but is not limited thereto, and the input circuit and the output circuit may be the same circuit, wherein the circuit is used as the input circuit and the output circuit at different moments. Specific implementations of the processor and various circuits are not limited to the embodiments of this application.

[0146] According to the eighth aspect, a processing unit is provided. The processing unit includes a communication interface and a processor. The communication interface is coupled to the processor. The communication interface is configured to input and / or output information. The information includes at least one of instructions and data. The processor is configured to enable the processing unit to execute a computer program to perform a method according to any one of the possible implementations of the first aspect and the second aspect.

[0147] Optionally, there is one or more processors and one or more memories.

[0148] According to the ninth aspect, a processing unit is provided. The processing unit includes a processor and memory. The processor is configured to read instructions stored in memory, receive a signal through a receiver, and transmit a signal through a transmitter to enable the processing unit to perform a method according to any one of the possible implementations of the first aspect and the second aspect.

[0149] Optionally, there is one or more processors and one or more memories.

[0150] Optionally, the memory may be integrated with the processor, or the memory and processor may be placed separately.

[0151] In a specific implementation process, the memory may be a non-transitory memory, such as read-only memory (ROM). The memory and the processor may be integrated into a single chip or placed separately on different chips. The type of memory and the manner in which the memory and the processor are placed are not limited to the embodiments of this application.

[0152] In the related information exchange process, it must be understood that, for example, transmitting instruction information may be a process that outputs instruction information from a processor, and receiving instruction information may be a process that inputs the received instruction information into a processor. Specifically, the information output by the processor may be output to the transmitter, and the input information received by the processor may come from the receiver. The transmitter and the receiver can be collectively referred to as a transceiver.

[0153] The devices of the eighth and ninth aspects may be chips. The processor may be implemented in hardware or in software. When the processor is implemented in hardware, the processor may be a logic circuit, an integrated circuit, etc. When the processor is implemented in software, the processor may be a general-purpose processor and is implemented by reading software code stored in memory. The memory may be integrated into the processor or located outside the processor and exist independently.

[0154] According to the tenth aspect, a computer program product is provided. The computer program product includes a computer program (also referred to as code or instructions). When the computer program is executed, the computer is enabled to perform a method according to any one of the possible implementations of the first aspect and the second aspect.

[0155] According to the eleventh aspect, a computer-readable medium is provided. The computer-readable medium stores a computer program (also referred to as code or instructions). When the computer program is executed on a computer, the computer is enabled to perform a method according to any one of the possible implementations of the first aspect and the second aspect.

[0156] According to the 12th aspect, a communication system is provided. The communication system includes the terminal device and network device described above. Brief explanation of the drawing

[0157] FIG. 1 is a schematic diagram of a communication system to which a channel information feedback method according to an embodiment of the present application can be applied. Figure 2 is a schematic diagram of precoding a reference signal based on a delay vector. Figure 3 is a schematic diagram of a method for acquiring channel information based on FDD mutuality. FIG. 4 is a schematic flowchart of a channel information feedback method according to an embodiment of the present application. Figure 5 is a schematic diagram of the correspondence relationship between angle-delay pairs, angle vectors, and delay vectors. Figure 6 is a schematic diagram of loading one angle-delay pair into one reference signal port. Figures 7 and 8 are schematic diagrams of loading multiple angle-delay pairs into a single reference signal port. Figure 9 is a schematic diagram of loading one angle-delay pair into one reference signal port. FIGS. 10 and FIGS. 11 are schematic diagrams of loading multiple angle-delay pairs into a single reference signal port. Figure 12 is a schematic diagram of the delay precision estimation error. FIG. 13 is a schematic diagram of loading some angle delays of angle-delay pairs obtained based on uplink and downlink channel mutuality into a reference signal port. FIGS. 14 and FIGS. 15 are schematic block diagrams of a communication device according to an embodiment of the present application. FIG. 16 is a schematic diagram of the structure of a terminal device according to an embodiment of the present application. FIG. 17 is a schematic diagram of the structure of a network device according to an embodiment of the present application. Specific details for implementing the invention

[0158] The following describes the technical solution of the present application with reference to the attached drawings.

[0159] The technical solution provided in this application may be applied to various communication systems, for example, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD), universal mobile telecommunications system (UMTS), worldwide interoperability for microwave access (WiMAX) communication systems, 5th generation (5G) mobile communication systems, or new radio access technology (NR). 5th generation mobile communication systems may include non-standalone (NSA) communication systems and / or standalone (SA) communication systems.

[0160] The technical solution provided in this application may additionally be applied to machine type communication (MTC), long term evolution-machine (LTE-M), device-to-device (D2D) networks, machine-to-machine (M2M) networks, Internet of Things (IoT) networks, or other networks. IoT networks may include, for example, the Internet of Vehicles. The communication modes of the vehicle Internet system are collectively referred to as vehicle-to-X (V2X, where X may represent anything). For example, V2X may include vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, or vehicle-to-network (V2N) communication.

[0161] The technical solution provided in this application may additionally be applied to future communication systems, for example, 6th generation mobile communication systems. This is not limited to this application.

[0162] In embodiments of the present application, the network device may be any device having a wireless transceiver function. The device includes, but is not limited to: an evolved NodeB (eNB), a radio network controller (RNC), a NodeB (NB), a base station controller (BSC), a base transceiver station (BTS), a home NodeB (e.g., a home evolved NodeB or a home NodeB, HNB), a baseband unit (BBU), an access point (AP) in a wireless fidelity (Wi-Fi) system, a wireless relay node, a wireless backhaul node, a transmission point (TP), or a transmission reception point (TRP). Alternatively, the network device may be, for example, a gNB in ​​an NR system, a transmission point (TRP or TP), one or a group of antenna panels of a base station in a 5G system (including multiple antenna panels), or a network node constituting a gNB or transmission point, for example, a baseband unit (BBU) or a distributed unit (DU).

[0163] In some deployments, the gNB may include a central unit (CU) and a DU. The gNB may further include an active antenna unit (AAU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB. For example, the CU is responsible for processing non-real-time protocols and services and implements the functions of the radio resource control (RRC) layer and the packet data convergence protocol (PDCP) layer. The DU is responsible for processing physical layer protocols and real-time services and implements the functions of the radio link control (RLC) layer, the medium access control (MAC) layer, and the physical (PHY) layer. The AAU implements some physical layer processing functions, radio frequency processing, and active antenna-related functions. Information from the RRC layer is eventually converted into information from the PHY layer or converted from information from the PHY layer. Therefore, in this architecture, higher-layer signaling, such as RRC layer signaling, may also be considered to be transmitted by the DU or by the DU and AAU. It can be understood that a network device may be a device comprising one or more of a CU node, a DU node, and an AAU node. Additionally, a CU may be classified as a network device in a radio access network (RAN), or a CU may be classified as a network device in a core network (CN). This is not limited to the present application.

[0164] A network device serves a cell, and a terminal device communicates with the cell using transmission resources (e.g., frequency domain resources or spectrum resources) allocated by the network device. The cell may belong to a macro base station (e.g., a macro eNB or a macro gNB) or to a base station corresponding to a small cell. Here, small cells may include metro cells, micro cells, pico cells, femto cells, etc. These small cells are characterized by small coverage and low transmission power, and can be applied to provide high-speed data transmission services.

[0165] In embodiments of the present application, the terminal device may also be referred to as user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device.

[0166] The terminal device is a device that provides a voice / data connection to the user, and may be, for example, a handheld device or a vehicle-mounted device having a wireless connection function. Current examples of terminals include mobile phones, tablet computers, computers with wireless transmission and reception capabilities (e.g., laptops or palmtop computers), mobile internet devices (MIDs), virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals for industrial control, wireless terminals for self-driving, wireless terminals for remote medical, wireless terminals for smart grids, wireless terminals for transportation safety, wireless terminals for smart cities, wireless terminals for smart homes, cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices, other processing devices connected to wireless modems, on-vehicle devices, wearable devices, terminal devices for 5G networks, and future evolved public It may be a terminal device of a public land mobile network (PLMN).

[0167] Wearable devices, also known as wearable intelligent devices, are a collective term for wearable devices such as glasses, gloves, watches, clothing, and shoes developed by applying wearable technology to the intelligent design of everyday wear. Wearable devices are portable devices that can be worn directly on a user's body or integrated with clothing or accessories. Wearable devices are not only hardware devices but also implement powerful functions through software support, data exchange, and cloud interaction. Generalized wearable intelligent devices include full-featured and large devices, such as smartwatches and smart glasses, that can implement all or part of functions without relying on smartphones, as well as devices that focus on only one type of application function and must work with other devices, such as smartphones, including various smart bands or smart jewelry designed to monitor physical signs.

[0168] In addition, terminal devices can also be terminal devices in an Internet of Things (IoT) system. IoT is an important part of the future development of information technology. The main technical feature of IoT is to implement intelligent networks for human-machine interconnection and thing-to-thing interconnection by using communication technology to connect things to a network. IoT technology can achieve large-scale connectivity, deep coverage, and terminal power saving by using technologies such as narrowband (NB).

[0169] Additionally, the terminal device may include sensors such as intelligent printers, train detectors, and gas stations, and the main functions of the terminal device include data collection (a function of some terminal devices), receiving control information and downlink data from network devices, transmitting electromagnetic waves, and transmitting uplink data to network devices.

[0170] To facilitate understanding of the embodiments of the present application, a communication system to which the channel measurement method according to an embodiment of the present application may be applied is first described in detail with reference to FIG. 1. FIG. 1 is a schematic diagram of a communication system (100) to which the method according to an embodiment of the present application may be applied. As shown in the drawing, the communication system (100) may include at least one network device such as the network device (101) shown in FIG. 1. The communication system (100) may further include at least one terminal device such as the terminal devices (102 to 107) shown in FIG. 1. The terminal devices (102 to 107) may be movable or fixed. The network device (101) may communicate with one or more of the terminal devices (102 to 107) via a wireless link. Each network device may provide communication coverage for a specific geographical area and may communicate with terminal devices within the coverage. For example, a network device can transmit configuration information to a terminal device, and the terminal device can transmit uplink data to the network device based on the configuration information. As another example, the network device can transmit downlink data to the terminal device. Thus, the network device (101) and terminal devices (102 to 107) of FIG. 1 constitute a communication system.

[0171] Optionally, terminal devices can communicate directly with each other, for example, using D2D technology. As illustrated in the drawing, terminal devices (105, 106) and terminal devices (105, 107) can communicate directly with each other using D2D technology. Terminal devices (106, 107) can communicate with terminal device (105) separately or simultaneously.

[0172] Alternatively, the terminal devices (105 to 107) may communicate individually with the network device (101). For example, the terminal devices (105 to 107) may communicate directly with the network device (101). For example, the terminal devices (105 and 106) of the drawing may communicate directly with the network device (101). Alternatively, the terminal devices (105 to 107) may communicate indirectly with the network device (101). For example, the terminal device (107) of the drawing communicates with the network device (101) through the terminal device (105).

[0173] FIG. 1 illustrates an example of a communication link between a network device, a plurality of terminal devices, and a communication device. Optionally, the communication system (100) may include a plurality of network devices, and the coverage of each network device may include a different number of terminal devices, for example, more or fewer terminal devices. This is not limited in the present application.

[0174] A plurality of antennas may be configured for each of the communication devices described above, for example, the network device (101) and terminal devices (102 to 107) of FIG. 1. The plurality of antennas may include at least one transmitting antenna for transmitting a signal and at least one receiving antenna for receiving a signal. Additionally, each communication device further includes a transmitter chain and a receiver chain. Those skilled in the art will understand that each of the transmitter chain and the receiver chain may include a plurality of components (e.g., a processor, a modulator, a multiplexer, a demodulator, a demultiplexer, or an antenna) related to signal transmission and reception. Thus, the network device and the terminal device may communicate with each other using multiple antenna technology.

[0175] Optionally, the communication system (100) may further include other network entities, such as a network controller or a mobility management entity. This is not limited to the embodiments of the present application.

[0176] To better understand the embodiments of the present application, the following items are described before the embodiments of the present application.

[0177] First, for the sake of convenience of understanding, the physical meanings expressed by various characters in the embodiments of this application are explained as follows.

[0178] Q represents the quantity of angle-delay pairs obtained by the network device based on uplink and downlink channel mutuality (denote), and Q is an integer greater than 1.

[0179] X represents the quantity of different angle vectors included in the Q angle-lag pairs, and X is a positive integer.

[0180] P represents the quantity of reference signal ports, that is, the quantity of ports obtained by performing spatial domain precoding on the reference signal or by performing spatial domain precoding and frequency domain precoding, and P is a positive integer.

[0181] S indicates the quantity of reference signal ports corresponding to the complex coefficients reported by the terminal device, which are allowed to be selected, and S is a positive integer.

[0182] T p is my p Displays the quantity of complex coefficients obtained by the terminal device through calculations for the reference signal port, and T p is a positive integer, and p = 0, 1, ...,P-1.

[0183] K represents the quantity of complex coefficients selected by the terminal device, and K is a positive integer.

[0184] U indicates the quantity of complex coefficients that the terminal device is allowed to select at each reference signal port, and U is a positive integer.

[0185] B represents the quantity of complex coefficients fed back by the terminal device, and B is a positive integer.

[0186] Z represents the quantity of the transport layer, and Z is a positive integer.

[0187] Second, in the embodiments of the present application, numbering may be performed sequentially starting from 0 for convenience of explanation. For example, P reference signal ports may include the 0th reference signal port through the (P-1)th reference signal port, and U complex coefficients may include the 0th complex coefficient through the (U-1)th complex coefficient. Of course, this is not limited to specific implementations. For example, numbering may otherwise be performed sequentially starting from 1. For example, Z transport layers may include the 1st transport layer through the Zth transport layer, Q angle-delay pairs may include the 1st angle-delay pair through the Qth angle-delay pair, and P reference signal ports may include the 1st reference signal port through the Pth reference signal port. For brevity, examples are not listed herein.

[0188] It should be understood that all descriptions provided above are intended to help explain the technical solutions provided in the embodiments of this application, but are not intended to limit the scope of this application.

[0189] Third, in this application, "indicating" may include "directly indicating" and "indirectly indicating." When a single indicating information is described as indicating A, the indicating information may indicate A directly or indirectly, but the indicating information does not necessarily indicate that it carries A.

[0190] Information indicated by the directive information is called to-be-indicated information. In a specific implementation process, there are multiple ways to indicate to-be-indicated information, and are not limited to, for example: the to-be-indicated information may be indicated directly, for example, by the to-be-indicated information or an index of the to-be-indicated information. Alternatively, the to-be-indicated information may be indicated indirectly by indicating other information, and there is an association between the other information and the to-be-indicated information. Alternatively, only a part of the to-be-indicated information may be indicated, and the remainder of the to-be-indicated information may be known or pre-agreed information. For example, specific information may be indicated using a pre-agreed sequence of arrays of various information (e.g., defined in a protocol) to reduce the indication overhead to some extent. Additionally, the indication overhead associated with indicating the same information individually may be reduced by additionally identifying and indicating common parts of various information. For example, those skilled in the art will understand that a precoding matrix contains precoding vectors, and that precoding vectors within a precoding matrix may have identical parts in terms of configuration or other attributes.

[0191] In addition, a specific method of instruction may be, but is not limited to, various existing methods of instruction, such as the method described above and various combinations thereof. For details regarding various methods of instruction, refer to the prior art. Details are not described in this specification. From the description above, it can be seen that when multiple pieces of information of the same type need to be indicated, different information may be indicated in different ways. In a specific implementation process, the required method of instruction may be selected according to specific requirements. The selected method of instruction is not limited to the embodiments of this application. In this way, the method of instruction in the embodiments of this application should be understood to encompass various methods by which the party to be indicated becomes aware of the information to be indicated.

[0192] The information to be directed may be transmitted as a whole or divided into multiple pieces of sub-information and transmitted individually. Additionally, the periododicity and / or occasion of transmission of such sub-information may be the same or different. In this application, no specific transmission method is limited. The periododicity and / or occasion of transmission of such sub-information may be predefined, for example, according to a protocol, or may be configured by the transmitting device by transmitting configuration information to the receiving device. As an example, but not limited to, configuration information may include one or more combinations of radio resource control signaling, medium access control (MAC) layer signaling, and physical layer signaling. Radio resource control signaling includes, for example, radio resource control (RRC) signaling. MAC layer signaling includes, for example, a MAC control element (CE). Physical layer signaling includes, for example, downlink control information (DCI).

[0193] Fourth, regarding many features, the definitions listed in this application (e.g., precoding matrix indicator (PMI), channel, resource block (RB), resource block group (RBG), subband, precoding resource block group (PRG), resource element (RE), angle, and delay) are for illustrative purposes only. For details, refer to the prior art.

[0194] Fifth, in the following embodiments, the first, second, and various numbers are used merely for distinction for convenience of explanation and are not intended to limit the scope of the embodiments of the present application. For example, terms are used to distinguish different indicating information.

[0195] Sixth, "predefined" or "preconfigured" may be implemented in a way that allows corresponding code or corresponding tables to be stored in advance in a device (e.g., including terminal devices and network devices) or used to indicate related information. Specific implementations of "predefined" or "preconfigured" are not limited in this application. "Storage" may be stored in one or more memories. One or more memories may be placed separately or integrated into an encoder or decoder, a processor, or a communication device. Alternatively, some of the one or more memories may be placed separately, and some of the one or more memories may be integrated into a decoder, a processor, or a communication device. The type of memory may be any form of storage medium. This is not limited in this application.

[0196] Seventh, in the embodiments of the present application, "protocol" may be a standard protocol in the field of communication and may include, for example, LTE protocols, NR protocols, and related protocols to be applied to future communication systems. This is not limited to the present application.

[0197] Eighth, "at least one" means one or more, and "plural" means two or more. Additionally, "and / or" describes an association between related objects and indicates that three relationships may exist. For example, A and / or B may indicate the following cases: where only A exists, where both A and B exist, or where only B exists, and A and B may be singular or plural. The character " / " generally indicates an "or" relationship between connected objects. At least one of the following items (pieces) or a similar expression indicates any combination of such items, including any combination of a single item (piece) or plural items (pieces). For example, at least one of a, b, and c may indicate: a, b, c, a and b, a and c, b and c, or a, b, and c, where a, b, and c may each be singular or plural.

[0198] Ninth, in the embodiments of the present application, descriptions such as "when," "case," and "if" mean that the device (e.g., terminal device or network device) performs a corresponding processing in an objective situation and are not intended to limit time; furthermore, the device (e.g., terminal device or network device) is not required to perform a decision action during implementation and does not imply any other limitations.

[0199] To aid in understanding the embodiments of the present application, the following is a brief explanation of the terms of the embodiments of the present application.

[0200] 1. Channel Reciprocity: In some communication modes, for example, the uplink channel and the downlink channel transmit signals over the same frequency domain resources but over different time domain resources. Within a short time period (e.g., the coherence period of channel propagation), the signals on the uplink channel and the downlink channel can be considered to undergo the same channel fading. This is the reciprocity between the uplink channel and the downlink channel. Based on the reciprocity between the uplink channel and the downlink channel, a network device can determine the uplink channel based on an uplink reference signal, such as a sounding reference signal (SRS), and estimate the downlink channel based on the uplink channel to determine a precoding matrix for downlink transmission.

[0201] However, in some other communication modes, such as FDD, the frequency band interval between the uplink and downlink channels is much larger than the coherence bandwidth, and since there is no complete mutuality between the uplink and downlink channels, the precoding matrix used for downlink transmission and determined using the uplink channel may not be adaptable to the downlink channel. Nevertheless, in FDD mode, partial mutuality, such as angle mutuality and delay mutuality, still exists between the uplink and downlink channels. Therefore, angle and delay can also be referred to as mutuality parameters.

[0202] When a signal is transmitted through a wireless channel, it can reach the receiving antenna from the transmitting antenna via multiple paths. Multipath delay causes frequency-selective fading, that is, a change in the frequency domain channel. Delay is the amount of transmission time for a wireless signal over different transmission paths; it is determined by distance and speed and is independent of the frequency domain of the wireless signal. When a signal is transmitted over different transmission paths, different transmission delays occur due to different distances. Since the physical locations of the network device and the terminal device are fixed, the multipath distribution delay on the uplink channel and the downlink channel is identical. Therefore, in FDD mode, the delays on the uplink channel and the downlink channel can be considered identical, or reciprocal.

[0203] Additionally, the angle may be the angle of arrival (AOA) at which a signal reaches a receiving antenna through a wireless channel, or the angle of discharge (AOD) at which a signal is transmitted through a transmitting antenna. In an embodiment of the present application, the angle may be the angle of arrival at which an uplink signal reaches a network device, or the angle of discharge at which a network device transmits a downlink signal. Due to the transmission path mutuality between an uplink channel and a downlink channel on different frequencies, the angle of arrival of an uplink reference signal and the angle of discharge of a downlink reference signal may be considered mutual.

[0204] In the embodiments of the present application, each angle can be represented by a single angle vector, and each delay can be represented by a single delay vector. Therefore, in the embodiments of the present application, a single angle vector can represent a single angle, and a single delay vector can represent a single delay.

[0205] Each angle vector can be combined with a delay vector described below to obtain an angle-delay pair. In other words, an angle-delay pair may include an angle vector and a delay vector.

[0206] 2. Reference signal (RS) and precoded reference signal: The reference signal may also be referred to as a pilot, reference sequence, etc. In the embodiments of this application, the reference signal may be a reference signal used for channel measurement. For example, the reference signal may be a channel state information reference signal (CSI-RS) used for downlink channel measurement, or an SRS used for uplink channel measurement. It should be understood that the reference signals described above are merely examples and should not constitute a limitation to this application. This application does not exclude the possibility of defining other reference signals in future protocols to implement the same or similar functions.

[0207] The precoded reference signal may be a reference signal obtained by precoding the reference signal. Specifically, precoding may include beamforming and / or phase rotation. For example, beamforming may be implemented by precoding the downlink reference signal based on one or more angle vectors, and phase rotation may be implemented by precoding the downlink reference signal based on one or more delay vectors.

[0208] In the embodiments of the present application, for convenience of distinction and explanation, a reference signal obtained through precoding, such as beamforming and / or phase rotation, is referred to as a precoded reference signal, and a reference signal that has not undergone precoding is abbreviated as a reference signal.

[0209] In an embodiment of the present application, precoding a downlink reference signal based on one or more angle vectors may also be referred to as loading one or more angle vectors as a downlink reference signal to implement beamforming, and precoding a downlink reference signal based on one or more angle vectors may also be referred to as loading one or more delay vectors as a downlink reference signal to implement phase rotation.

[0210] 3. Angle Vector: The angle vector may also be referred to as a spatial domain vector or a beam vector. The angle vector can be understood as a precoding vector used to perform beamforming on a reference signal. The process of precoding a reference signal based on the angle vector can be viewed as a process of performing precoding in the spatial domain.

[0211] The angle vector has a length N tx It can be a vector. N tx Is It can indicate the number of transmitting antenna ports, N tx is an integer greater than 1. The length is N tx The angle vector is N tx It includes spatial domain weights (shortened to weights), and N tx The weights are N tx Since it is used to assign weights to the transmitting antenna ports, N tx The reference signal transmitted by the transmitting antenna ports has a specific spatial directivity, and accordingly, beamforming can be implemented.

[0212] Precoding a reference signal based on different angle vectors is equivalent to performing beamforming on a transmitting antenna port based on different angle vectors so that the transmitted reference signal has different spatial orientations.

[0213] Optionally, the angle vector is a Discrete Fourier Transform (DFT) vector. The DFT vector can be a vector of the DFT matrix.

[0214] Optionally, the angle vector is the conjugate transpose vector of the DFT vector. The conjugate transpose vector of the DFT vector can be the column vector of the conjugate transpose matrix of the DFT matrix.

[0215] Optionally, the angle vector is an oversampled DFT vector. The oversampled DFT vector can be a vector of the oversampled DFT matrix.

[0216] In possible designs, the angle vector is a 2D DFT vector defined, for example, in Type II of 3rd Generation Partnership Project (3GPP) technical specification (TS) 38.214 Release 15 (R15) or R16. It can be. In other words, the angle vector can be a 2D-DFT vector or an oversampled 2D-DFT vector.

[0217] It should be understood that specific forms of angle vectors are merely examples and do not constitute any limitation to this application. For example, delay vectors may be obtained from DFT matrices. Specific forms of delay vectors are not limited in this application.

[0218] It should be further understood that the angle vector is a form representing an angle in this application. Since the angle vector is named to be easily distinguishable from the delay vector, it should not constitute any limitation in this application. This application does not exclude the possibility of defining other names in future protocols to represent the same or similar meanings.

[0219] actual downlink channels If displayed as, The dimension is R× N tx It can be represented as a matrix. R is the quantity of receiving antenna ports and N tx is the quantity of transmitting antenna ports. R and N tx are all positive integers. In downlink transmission, a precoded reference signal obtained by precoding a reference signal based on an angle vector can be transmitted to a terminal device via the downlink channel. Therefore, the channel measured by the terminal device based on the received precoded reference signal is equivalent to the channel loaded with the angle vector. For example, angle vector The channel acquired after being loaded into downlink channel V is It can be represented as follows. In other words, loading an angle vector as a reference signal is the angle vector being loaded into a channel.

[0220] 4. Delay Vector: The delay vector is also called the frequency domain vector. The delay vector is a vector that indicates the channel change rule in the frequency domain. As explained above, multipath delay causes frequency-selective fading. Through the Fourier transform, it can be seen that the time delay of a signal in the time domain can be equivalent to the phase gradient in the frequency domain.

[0221] Since the channel phase change of each frequency domain unit is related to delay, the phase change rule of each frequency domain unit channel can be indicated by a delay vector. In other words, the delay vector can indicate the delay characteristics of the channel.

[0222] The delay vector has a length N f It can be a vector. N f can represent the quantity of frequency domain units used to carry a reference signal, and N f is an integer greater than 1. The length is N f The delay vector is N f It includes frequency domain weights (weights for short), N f The weights are each N f It can be used to perform phase rotation for several frequency domain units. N f A reference signal carried in a frequency domain unit can be precoded to compensate in advance for frequency selection characteristics caused by multipath delay. Therefore, the process of precoding the reference signal based on a delay vector can be regarded as a process of performing precoding in the frequency domain.

[0223] Precoding a reference signal based on different delay vectors is equivalent to performing phase rotation for each frequency domain unit of a channel based on different delay vectors. Additionally, the phase rotation angle of the same frequency domain unit can vary.

[0224] Optionally, the delay vector is a DFT vector. The DFT vector can be a vector of the DFT matrix.

[0225] For example, the delay vector is It can be represented as, is. l = 1, 2, ..., L. L can represent the quantity of the delay vector. f 1, f 2, ..., f Nf are respectively the first frequency domain unit, the second frequency domain unit,..., the N f It represents the carrier frequency of the frequency domain unit.

[0226] Optionally, the delay vector is the conjugate transpose of the DFT vector. The conjugate transpose of the DFT vector can be the column vector of the conjugate transpose of the DFT matrix.

[0227] Optionally, the delay vector is an oversampled DFT vector. The oversampled DFT vector can be a vector of the oversampled DFT matrix.

[0228] It should be understood that the specific form of delay vector described above is merely an example and should not constitute a limitation to this application. For example, the delay vector may be obtained from a DFT matrix. The specific form of the delay vector is not limited in this application.

[0229] It should be further understood that the delay vector is a form representing delay in this application. The delay vector is named solely to facilitate distinction from the angle vector and should not constitute a limitation to this application. This application does not exclude the possibility that other names may be defined in future protocols to represent the same or similar meanings.

[0230] In downlink transmission, a precoded reference signal obtained by precoding a reference signal based on a delay vector can be transmitted to a terminal device through the downlink channel. Therefore, the channel measured by the terminal device based on the received precoded reference signal is equivalent to the channel loaded with the delay vector. In other words, loading the delay vector as a reference signal is equivalent to loading the delay vector into the channel. Specifically, multiple weights of the delay vector are each loaded into multiple frequency domain units of the channel, and each weight is loaded into a single frequency domain unit.

[0231] For example, a frequency domain unit is a resource block (RB). Its length is N f If the reference signal is precoded based on the delay vector, the delay vector's N f The weights N f Each can be loaded with a reference signal carried from the RBs, that is, the delay vector's N f The number of elements N f It is loaded into each RB. Delay vector The n The element is the nth RB's channel The channel acquired after being loaded is, for example, It can be represented as.

[0232] It should be understood that the method of precoding a reference signal based on a delay vector is similar to the processing method of performing precoding in the spatial domain, except that the spatial domain vector (or angle vector) is replaced with the delay vector.

[0233] It should be noted that frequency domain precoding for a reference signal based on a delay vector may be performed before or after resource mapping. This is not limited to the present application.

[0234] For ease of understanding, delay vector The process of precoding a reference signal based on [this] will be described in detail later with reference to Fig. 2.

[0235] Figure 2 is a delay vector Based on, N f This is a schematic diagram of precoding the reference signal carried in the RB. N f The RBs are, for example, RB #1, RB #2, ..., RB # N f It may include. Each box in the drawing indicates one RB. Although not shown in the drawing, it can be understood that each RB in the drawing may include one or more resource elements (RE) used to carry reference signals.

[0236] Delay vector go N f When loaded with RB, N f A corresponding phase rotation can be performed for each of the RBs. of the delay vector N f doggy The weight is N f doggy It can have a one-to-one correspondence with RB. For example, frequency domain vector Elements of It can be loaded as RB #1, and the delay vector Elements of It can be loaded as RB #2, and the delay vector Elements of is RB # N f It can be loaded as. Similarly, delay vector The n element can be loaded as RB #n. For brevity, examples are not listed here one by one.

[0237] Figure 2 is merely an example, and the delay vector cast N f doggy It should be understood that an example of loading with RB is illustrated. However, this should not constitute any limitation to the present application. Used to carry the reference signal in FIG. 2 N f doggy RB is continuous N f doggy It could be RB, or non-continuous N f There may be RBs. This is not limited to the present application.

[0238] Furthermore, it should be understood that for the sake of ease of understanding, only one delay vector was used as the example above to explain the correspondence between the delay vector weights and the frequency domain unit. However, this should not constitute any limitation to the present application. Network devices may use more delay vectors N f Can be loaded with RB.

[0239] An example in which RB is a frequency domain unit is as described above with reference to FIG. 2. However, it should be understood that the specific definition of a frequency domain unit is not limited in this application.

[0240] For example, the frequency domain unit may be a subband, or an RB, or an RB group (resource block group, RBG) or a precoding resource block group (PRG). This is not limited to the present application.

[0241] Optionally, each frequency domain unit is a single RB. Each element of the delay vector can be loaded as a single RB. In this case, the length of the delay vector N f can be equal to the quantity of RBs in a broadband. Each weight of a delay vector corresponds to one RB.

[0242] Optionally, each frequency domain unit is a subband. Each element of the delay vector can be loaded as a subband. In this case, the length of the delay vector N f It can be equal to the quantity of subbands in a broadband. Each weight of a delay vector corresponds to one subband.

[0243] 5. Angle-Late Pair: An angle-late pair may also be referred to as a space-frequency vector pair, a space-frequency pair, etc. An angle-late pair may be a combination of an angle vector and a delay vector. In one implementation, each angle-late pair may include an angle vector and a delay vector. The angle vector and / or delay vector included in any two angle-late pairs are different from each other. In other words, each angle-late pair can be uniquely determined by an angle vector and a delay vector.

[0244] In an embodiment of the present application, the reference signal is an angle vector and delay vector When precoded based on, the precoding matrix used to precode the reference signal can be expressed as the product of the angle vector and the conjugate transpose of the delay vector, for example, It can be expressed as, and the dimension of the precoding matrix is N t × N f It can be; or the precoding matrix used to precode the reference signal can be expressed as the Kronecker product of the angle vector and the delay vector, for example, It can be expressed as, and the dimension of the precoding matrix is N t × N f It could be.

[0245] It should be understood that the various mathematical expressions listed above are merely examples and should not constitute a limitation on this application. For example, a precoding matrix used to precode a reference signal may be expressed as the product of the conjugate transpose of a delay vector and an angle vector or the Kronecker product of a delay vector and an angle vector, wherein the dimension of the precoding matrix is N t × N ff It can be. Alternatively, the precoding matrix used to precode the reference signal can be expressed as a mathematical transformation of the equation described above. For the sake of brevity, examples are not listed here one by one.

[0246] 6. Port: A port is also called an antenna port. In an embodiment of the present application, a port may include a transmitting antenna port, a reference signal port, and a receiving port.

[0247] The transmitting antenna port may be an actual independent transceiver unit (TxRU). For example, in downlink transmission, the transmitting antenna port may be a TxRU of a network device. In an embodiment of the present application, N tx can indicate the quantity of transmitting antenna ports, and N tx is an integer greater than 1.

[0248] A reference signal port may be a port corresponding to a reference signal. Since the reference signal is precoded based on an angle vector and a delay vector, the reference signal port may be a port for the precoded reference signal. For example, each reference signal port corresponds to one or more angle-delay pairs, or each reference signal port corresponds to one angle vector. In an embodiment of the present application, P may represent a quantity of reference signal ports, and P is an integer greater than or equal to 1.

[0249] 7. Complex Coefficients: Each complex coefficient may correspond to one angle vector and one delay vector selected to construct the precoding vector, or to one angle-delay pair. Each complex coefficient may include amplitude and phase. For example, complex coefficients In this case, a is the amplitude and is a phase.

[0250] 8. Transport layer: The transport layer may also be referred to as a spatial layer, layer, transport stream, spatial stream, stream, etc. In an embodiment of the present application, the quantity of the transport layer may be determined by a rank fed back by a terminal device based on channel measurement. For example, the quantity of the transport layer may be equal to a rank fed back by a terminal device based on channel measurement.

[0251] For example, the precoding matrix can be determined by performing singular value decomposition (SVD) on the channel matrix or the covariance matrix of the channel matrix. In the SVD process, different transport layers can be distinguished from one another based on singular values. For example, a precoding vector determined by a right singular vector corresponding to the maximum singular value corresponds to the first transport layer, and a precoding vector determined by a right singular vector corresponding to the minimum singular value corresponds to the Zth transport layer. That is, the singular values ​​corresponding to the first through Zth transport layers decrease sequentially.

[0252] As another example, the precoding matrix can be determined by performing eigenvalue decomposition (EVD) on the covariance matrix of the channel matrix. In the EVD process, different transport layers can be distinguished from one another based on eigenvalues. For example, a precoding vector determined by an eigenvector corresponding to the maximum eigenvalue may correspond to the first transport layer, and a precoding vector determined by an eigenvector corresponding to the minimum eigenvalue may correspond to the Zth transport layer. That is, the eigenvalues ​​corresponding to the first through Zth transport layers decrease sequentially.

[0253] It should be understood that distinguishing between different transport layers based on unique or singular values ​​is merely a possible implementation and should not constitute a limitation to this application. For example, other criteria for distinguishing transport layers may be predefined in the protocol. This is not limited to this application.

[0254] The physical uplink resources used whenever a terminal device reports a CSI are pre-allocated by the network device, but the network device cannot guarantee that the allocated resources are sufficient to carry all the information of the CSI determined by the terminal device each time.

[0255] For example, physical uplink resources pre-allocated by a network device are allocated based on the instruction overhead required when the rank is 1. When a terminal device determines that the rank is greater than 1 based on channel measurements, the physical uplink resources pre-allocated by the network device may be insufficient to transmit all the information of the CSI.

[0256] In currently known implementations, when a UE's reporting resources are limited, the UE performs priority sorting on Part 2 of CSI reports according to priority calculation rules and discards some low-priority reports to meet the limited reporting resources, starting with the lowest priority. Specifically, the priority calculation rules for Part 2 of CSI reports are as follows:

[0257]

[0258] v is the total number of streams to be transmitted. L is the quantity of beams selected in the spatial domain. am. is in the frequency domain It is the quantity of subbands selected from the subbands. is the selected f It is a frequency domain index value of the subband, and the index value is obtained by cyclically shifting to zero with the frequency domain component corresponding to the strongest coefficient as a reference, i.e. am.

[0259] From Equation 1, it can be seen that the priority of the reported volume of Part 2 of the existing CSI report is jointly determined by the quantity of the current transmission stream, the spatial domain beam index, and the frequency domain subband index. The smaller the calculated value, the higher the priority of the corresponding report amount.

[0260] As illustrated in FIG. 3, based on the characteristics of partial reciprocity between FDD channels, the base station can acquire information regarding reciprocity (angle and delay, etc.) between the uplink channel and the downlink channel through the uplink channel and load the reciprocity information into the CSI-RS pilot. Additionally, the UE only needs to feed back information regarding the irreciprocity of the uplink channel and the downlink channel to the base station. Therefore, the base station can acquire the complete CSI of the downlink channel by referring to the reciprocity information acquired from the uplink channel and using the non-reciprocity information fed back by the UE.

[0261] The base station performs angle and delay estimation on the uplink channel to obtain information regarding the mutuality between the uplink channel and the downlink channel. The uplink channel is It can be expressed as, and the formula It can be vectorized. is spatial domain information that physically corresponds to the arrival angle / departure angle of the base station. N tx indicates the number of transmitting antenna ports. It physically corresponds to the delay of each multipath signal reaching the base station using frequency domain information. N f indicates the quantity of frequency domain units. represents Kronecker products. is a matrix It is the column vector representation of the element. is the weight matrix corresponding to each angle-delay pair. For FDD uplink and downlink channels, angle information and delay information are reciprocal. That is, there is reciprocity between uplink channel S and downlink channel F, and the complex coefficients corresponding to the angle-delay pairs of the uplink channel and downlink channel and There is no reciprocity between them.

[0262] The base station utilizes the reciprocity characteristics between the uplink angle and delay and the downlink angle and delay to load both the angle and delay information estimated based on the uplink information into the CSI-RS pilot, and loads information regarding one angle-delay pair for each CSI-RS port. In this case, the full-band overlap coefficient of each angle-delay pair To obtain it, it is sufficient to perform full-band accumulation on the pilot information received from the UE side. is the port of sub-range s i This is the channel estimation result for . Additionally, the UE reports the full-band overlap coefficients of each angle-delay pair to the base station in Part 2 of the CSI report. The base station can complete downlink channel reconstruction based on the mutual spatial domain information matrix S and frequency domain information matrix F.

[0263] In the process where the base station acquires the downlink CSI using partial mutuality between FDD channels, the UE must report only one or more full-band overlap factors in the CSI of each pilot port, and the feedback amount is a frequency domain component f It can be seen from the explanation above that it is unrelated to. Therefore, to indicate the priority of the frequency domain subband, π of Equation (1) f ) is no longer needed. Therefore, the method of calculating the priority of the reporting volume of Part 2 of the CSI report according to formula (1) can no longer be applied due to redundancy in calculation.

[0264] With this in mind, the present application provides a channel information feedback method for directly and effectively identifying the priority of CSIs to be reported.

[0265] A channel information feedback method provided in an embodiment of the present application will be described in detail below with reference to the attached drawings.

[0266] For the convenience of explanation and understanding, it should be understood that the method provided in the embodiments of this application is described in detail below by way of example, with the interaction between a network device and a terminal device. However, this should not constitute a limitation on the entity executing the method provided in this application. For example, the terminal device illustrated in the following embodiments may be replaced by a component placed in the terminal device (e.g., a circuit, a chip, a chip system, or other functional module capable of calling and executing a program), and if channel information feedback can be implemented according to the method provided in the embodiments of this application by executing a program that records the code of the method provided in the embodiments of this application, the network device illustrated in the following embodiments may be replaced by a component placed in the network device (e.g., a circuit, a chip, a chip system, or other functional module capable of calling and executing a program).

[0267] FIG. 4 is a schematic flowchart of a channel information feedback method (400) according to an embodiment of the present application. As shown in FIG. 4, the method (400) may include S410 to S450. The steps of the method (400) are described in detail below with reference to FIG. 4.

[0268] S410: The network device generates a precoded reference signal.

[0269] A network device can obtain a precoded reference signal by precoding a reference signal to P reference signal ports based on Q angle-delay pairs.

[0270] Each of the Q angle-lag pairs contains one angle vector and one lag vector. The Q angle-lag pairs are distinct. Any two angle-lag pairs have different angle vectors, and / or any two angle-lag pairs have different lag vectors. In other words, any two angle-lag pairs are different in at least one of the angle vector and the lag vector.

[0271] Therefore, it can be understood that among the Q angle vectors included in the Q angle-delay pairs, there may be one or more repetitive angle vectors, and among the Q delay vectors included in the Q angle-delay pairs, there may also be one or more repetitive delay vectors. If the Q angle-delay pairs obtained through combination are different from each other, this is not limited in the present application. In other words, the Q angle-delay pairs can be obtained by combining one or more different angle vectors and one or more different delay vectors. It is assumed that the Q angle-delay pairs include X different angle vectors and Y different delay vectors. In this case, Q is not necessarily equal to X×Y. For example, in FIG. 5, four angle-delay pairs (boxes filled with patterns in FIG. 5) are shown and correspond to four angle vectors and three delay vectors.

[0272] One or more angle vectors and one or more delay vectors may be one or more strong angle vectors and one or more strong delay vectors determined by the network device based on uplink channel measurements and mutuality between the uplink channel and the downlink channel. For example, the network device may perform DFT-based decisions in the spatial domain and the frequency domain on the uplink channel, or perform DFT-based decisions using existing estimation algorithms, such as the joint angle and delay estimation (JADE) algorithm. This is not limited to the present application.

[0273] One or more angle vectors and one or more delay vectors may be determined by a network device through statistical collection based on the feedback results of one or more previous downlink channel measurements. This is not limited to the present application.

[0274] The method by which network devices generate precoded reference signals is explained in detail below.

[0275] In a possible implementation, a network device can precode reference signals at P reference signal ports based on Q angle-delay pairs. Reference signal precoding at each of the P reference signal ports is determined by one of the Q angle-delay pairs, and reference signal precoding at different reference signal ports is determined by different angle-delay pairs. In this case, it can be seen that Q = P.

[0276] FIG. 6(a) is a schematic diagram of loading one angle-delay pair into one reference signal port using an example where Q = P = 32. As shown in FIG. 6(a), the weight corresponding to the first angle-delay pair is the first reference signal port ( pLoaded into all RBs of (indicated by 1), ..., the weights corresponding to the 32nd angle-delay pair are the 32nd reference signal port ( p 32 All RBs of (indicated by) are loaded.

[0277] As explained above, each angle-delay pair corresponds to one precoding vector (weight vector), and the set of weight vectors corresponding to Q angle-delay pairs is It is displayed as, is a weight vector corresponding to q angle-lag pairs, and Z explained above. H Corresponds to the column of. The weight loaded to the nth RB of the pth reference signal port is g q ((n-1)×N tx +1:n×N tx ) and, that is, the weight loaded into the nth RB of the pth reference signal port is the weight vector corresponding to the qth angle-delay pair In the first (( n -1)× N tx +1) Element or the (n× N tx It is an element.

[0278] In another possible implementation, a network device can precode reference signals on P reference signal ports based on Q angle-delay pairs. The reference signal precoding for each of the P reference signal ports is determined by T angle-delay pairs out of the Q angle-delay pairs, and the reference signal precoding for different reference signal ports is determined by different angle-delay pairs. T is a positive integer and T ≥ 2.7. In this case, it can be seen that Q = P × T.

[0279] In the embodiments of the present application, the method of loading T angle-delay pairs into a single reference signal port is not limited.

[0280] In one example, a network device can group frequency domain units on each reference signal port to load T angle-delay pairs into a single reference signal port.

[0281] For example, a network device can group the frequency domain units of each reference signal port into T groups and load one angle-delay pair into each frequency domain unit group, thereby loading T angle-delay pairs into one reference signal port.

[0282] FIG. 7(a) is a schematic diagram of loading T angle-delay pairs into a single reference signal port using an example where Q = 32, T = 4, and P = 8. As shown in FIG. 7(a), the weight of the RB corresponding to the first angle-delay pair is the first reference signal port ( p Loaded into frequency domain unit group 1 (including RB #1 / RB #5 / RB #9 ...) of (indicated by 1), ..., the weights of the RBs corresponding to the fourth angle-delay pair p The frequency domain unit group 4 of 1 (including RB #4 / RB #8 / RB #12 ...) is loaded, ..., the weight of the RB corresponding to the 30th angle-delay pair is the 8th reference signal port ( p Loaded into frequency domain unit group 2 (including RB #2 / RB #6 / RB #10 ...) of (indicated by 8), ..., the weights of the RBs corresponding to the 31st angle-delay pair p Loaded into frequency domain unit group 3 of 8 (including RB #3 / RB #7 / RB #11 ...), the weights of the RBs corresponding to the 32nd angle-delay pair p It is loaded into the frequency domain unit group 4 of 8.

[0283] Fig. 8 shows four angle-delay pairs using an example where each reference signal port corresponds to 16 RBs. p This is a schematic diagram of loading to 1. As illustrated in the drawing p The four angle-delay pairs corresponding to 1 are , , , and Assume that RB #1, RB #5, RB #9, and RB #13 are the same angle-delay pair It can correspond to. RB #2, RB #6, RB #10, and RB #14 are the same angle-delay pair It can correspond to. RB #3, RB #7, RB #11, and RB #15 are the same angle-delay pair It can correspond to. RB #4, RB #8, RB #12, and RB #16 are the same angle-delay pair It can respond to.

[0284] To avoid confusion, Fig. 8(a) is an angle vector inside An example of loading into RB is illustrated, and FIG. 8(b) is the delay vector. FIG. 8 is the delay vector inside Illustrates an example of loading into RB.

[0285] First, refer to Fig. 8(a). Angle vector It can be loaded with RB #1, RB #5, RB #9, and RB #13. Angle vector It can be loaded with RB #2, RB #6, RB #10, and RB #14. Angle vector It can be loaded with RB #3, RB #7, RB #11, and RB #15. Angle vector It can be loaded as RB #4, RB #8, RB #12, and RB #16. In the 16 RBs arranged in order from RB #1 to RB #16, the angle vector inside It can be seen that the RBs are loaded sequentially to form multiple cycles, that is, four consecutive RBs corresponding to the same reference signal port can each correspond to four different angle vectors.

[0286] Also refer to Fig. 8(b). Delay vector inside Each is expressed as follows:

[0287] and

[0288] As illustrated in the drawing, delay vector The first weight of It can be loaded as RB #1. Delay vector The second weight of It can be loaded as RB #2. Delay vector The third weight of It can be loaded as RB #3. Delay vector The fourth weight of It can be loaded as RB #4. Delay vector The 5th weight of It can be loaded as RB #5. Delay vector The 6th weight of It can be loaded as RB #6. Delay vector The 7th weight of It can be loaded as RB #7. Delay vector The 8th weight of can be loaded as RB #8. The rest is inferred by analogy. Delay vector The 16th weight of It is loaded as RB #16. That is, each of the four consecutive RBs corresponding to the same reference signal port can correspond to four different delay vectors.

[0289] For each reference signal port, the network device, based on the method described above, has T angle-delay pairs corresponding to the reference signal port N f Can be loaded with RB.

[0290] In another example, a network device can load T angle-delay pairs into a single reference signal port by individually loading different angle-delay pairs at different delay positions on each reference signal port.

[0291] For example, at the same reference signal port, a network device can load the T angle-delay pairs into a single reference signal port by shifting the delays of T angle-delay pairs to T different specific delay locations (frequency domain-based) and then performing superposition.

[0292] FIG. 9 is a schematic diagram of loading one angle-delay pair into one reference signal port by a network device. For example, using a frequency domain DFT-based example, this is equivalent to the network device shifting the delay of each delay pair into a direct current component on each reference signal port. The terminal device extracts the corresponding direct current component for feedback. For example, in FIG. 9, at ports 1 and 2, the network device individually shifts the delays corresponding to two angle-delay pairs into direct current components, and the terminal device can obtain feedback coefficients through full-band superposition.

[0293] FIG. 10 is a schematic diagram of loading angle-delay pairs by a network device at different delay locations of a single reference signal port using an example where Q=4, T=2, and P=2. As shown in FIG. 10(a), at Port 1, the network device loads the two angle-delay pairs into Port 1 by shifting the delays of two angle-delay pairs to two specific delay locations, delay 0 and delay 5, and then performing superposition. Similarly, at Port 2, the network device loads the two angle-delay pairs into Port 2 by shifting the delays of two angle-delay pairs to two specific delay locations, delay 0 and delay 5, and then performing superposition.

[0294] In another example, a network device can group frequency domain units on each reference signal port and individually load different angle-delay pairs at different delay positions on each reference signal port, thereby loading T angle-delay pairs into a single reference signal port.

[0295] For example, on the same reference signal port, a network device may group frequency domain units into E groups and individually load different angle-delay pairs at F different delay positions on a single reference signal port, thereby loading T angle-delay pairs onto a single reference signal port. E and F are both positive integers, and E×F = T.

[0296] FIG. 11 is a schematic diagram of loading eight angle-delay pairs into Port 1 using an example where E=4, F=2, and T=8. As shown in FIG. 11, the network device divides the frequency domain units on Port 1 into four groups, so the network device can individually load different angle-delay pairs into four frequency domain unit groups, and the network device can additionally individually load different angle-delay pairs into delay 0 and delay 6. Specifically, the network device can load the first angle-delay pair into delay 0-frequency domain unit group 1, load the second angle-delay pair into delay 0-frequency domain unit group 2 of Port 1, ..., load the seventh angle-delay pair into delay 6-frequency domain unit group 3, and load the eighth angle-delay pair into delay 6-frequency domain unit group 4.

[0297] In another possible implementation, a network device can precode reference signals on P reference signal ports based on Q angle-delay pairs. The reference signal precoding for each of the P reference signal ports is determined by T forms of one of the Q angle-delay pairs, and the reference signal precoding for different reference signal ports is determined by different angle-delay pairs. In this case, it can be seen that Q = P.

[0298] As described above, one or more angle vectors and one or more delay vectors included in Q angle-delay pairs can be obtained by a network device through measurements of the uplink channel based on the mutuality between the uplink link channel and the downlink channel. However, since the precision of delay estimation at the network device side is limited, an error may exist between the estimated delay and the actual delay, for example, as illustrated in FIG. 12. Therefore, to account for delay precision, the network device can load T forms of one angle-delay pair into a single reference signal port. Loading T forms of one angle-delay pair into a single reference signal port can be implemented by the network device shifting the angle-delay pair to T specific delay positions. Specifically, the network device shifting the angle-delay pair to the t-th specific delay position can be implemented by multiplying the frequency domain component point of the weight vector corresponding to the angle-delay pair by the DFT vector determined by the t-th delay position.

[0299] In another possible implementation, a network device can precode a reference signal on P reference signal ports based on M angle-delay pairs out of Q angle-delay pairs. Reference signal precoding for each of the P reference signal ports is based on M angle-delay pairs out of M angle-delay pairs. p It is determined by angle-delay pairs, and reference signal precoding for different reference signal ports is determined by different angle-delay pairs. M and M p is a positive integer, and and p = 0, 1, 2, ..., P-1.

[0300] Specifically, the value of M may be included in Q angle-delay pairs and may not be smaller than the quantity X of different angle vectors.

[0301] FIG. 13 is a schematic diagram of loading angle-delay pairs to a reference signal port by a network device using an example where Q=6, P=4, and M=4. As illustrated in FIG. 13, it is assumed that the network device obtains six angle-delay pairs by measuring the uplink channel based on the mutuality between the uplink channel and the downlink channel. Angle-delay pair 1 and angle-delay pair 2 have the same angle information and different delay information, and angle-delay pair 5 and angle-delay pair 6 have the same angle information and different delay information. The network device can load angle-delay pair 1, angle-delay pair 3, angle-delay pair 4, and angle-delay pair 5 to ports 1 through 4, respectively (from what has been described above, it can be seen that loading angle-delay pairs to a reference signal port is equivalent to converting the delay of the angle-delay pairs to a delay zero point).

[0302] It should be understood that the illustration in FIG. 13 uses only the example of loading a single angle-delay pair into a single reference signal port. In this implementation, multiple angle-delay pairs may be loaded into a single reference signal port. For example, a network device may load both angle-delay pair 1 and angle-delay pair 2 in FIG. 13 into reference signal port 1. In another example, a network device may load both angle-delay pair 5 and angle-delay pair 6 in FIG. 13 into reference signal port 4.

[0303] Additionally, it should be understood that only an example in FIG. 13 is described in which angle-delay pairs having different angle information are loaded into different reference signal ports. In this implementation, angle-delay pairs having different angle information can be loaded into the same reference signal port. For example, a network device can load angle-delay pair 3 and angle-delay pair 4 of FIG. 13 into the same reference signal port.

[0304] In another possible implementation, the network device can precode reference signals at P reference signal ports based on angle vectors contained in Q angle-delay pairs.

[0305] In one example, a network device can precode reference signals on P reference signal ports based on Q angle vectors of Q angle-delay pairs. The reference signal precoding for each of the P reference signal ports is determined by one of the Q angle vectors, and the reference signal precoding for different reference signal ports is determined by different angle vectors. In this case, it can be seen that Q = P.

[0306] In this case, the above method may further include the following: the network device transmits instruction information #1 (i.e., second instruction information), and instruction information #1 indicates a delay vector corresponding to each Q angle vector. In response, the terminal device receives instruction information #1. In other words, instruction information #1 indicates a delay vector corresponding to each of P reference signal ports. It can be seen that the quantity of the delay vector corresponding to each angle vector in Q angle vectors is 1.

[0307] In another example, a network device can precode reference signals on P reference signal ports based on X different angle vectors in Q angle-delay pairs. The reference signal precoding for each of the P reference signal ports is determined by one of the X angle vectors, and the reference signal precoding for different reference signal ports is determined by different angle vectors. In this case, it can be seen that P = X.

[0308] In this case, the method (400) may further include: the network device transmits instruction information #2 (i.e., fifth instruction information) to the terminal device, and instruction information #2 indicates a delay vector corresponding to each of X angle vectors. In other words, instruction information #2 indicates a delay vector corresponding to each of P reference signal ports. It can be understood that the number of delay vectors corresponding to different angle vectors among the X angle vectors may be different or the same. For example, in FIG. 13, the six angle-delay pairs include four different angle vectors, the number of delay vectors corresponding to the first angle vector or the fourth angle vector is 2, and the number of delay vectors corresponding to the second angle vector or the third angle vector is 1.

[0309] S420: The network device transmits a precoded reference signal. In response, at S420, the terminal device receives the precoded reference signal.

[0310] A network device can transmit a precoded reference signal to a terminal device using a pre-configured reference signal resource. The process by which the network device transmits the precoded reference signal to the terminal device may be the same as that of the prior art. For the sake of brevity, details are not described again here.

[0311] It can be understood that a network device transmits reference signals of P reference signal ports, and a terminal device can receive reference signals of P reference signal ports.

[0312] S430: The terminal device generates first instruction information, the first instruction information indicates B complex coefficients, and the B complex coefficients are determined from K complex coefficients according to a preset priority rule.

[0313] K complex coefficients are determined from the complex coefficient set. The complex coefficient set is determined at each of the Z transport layers, and also among the P reference signal ports, the p T corresponding to the reference signal port p It contains complex coefficients. p = 0, 1, 2, ..., P-1.

[0314] The terminal device performs channel estimation based on the precoded reference signal received in S420 to obtain a channel estimation value corresponding to each reference signal port on each frequency domain unit, and can further obtain complex coefficients corresponding to each reference signal port. It can be understood that if the quantity of angle-delay pairs corresponding to a single reference signal port is different, the quantity of complex coefficients corresponding to the reference signal port obtained by the terminal device is also different.

[0315] In the first possible implementation, when the quantity of angle-delay pairs corresponding to a single reference signal port is 1, the quantity of complex coefficients corresponding to the reference signal port, which are acquired by the terminal device, is also 1. That is, T0 = T1 = T2 = ... = T P-1 = 1.

[0316] As described above, the network device can load one angle-delay pair into one reference signal port and Q angle-delay pairs into P reference signal ports individually. In this case, it can be seen that one reference signal port corresponds to one angle-delay pair. Accordingly, for one reference signal port, the terminal device can obtain one complex coefficient corresponding to the reference signal port.

[0317] FIG. 6(b) is a schematic diagram showing how a terminal device obtains a complex coefficient corresponding to a reference signal port when an angle-delay pair is loaded into a reference signal port. As illustrated in FIG. 6(b), the complex coefficient corresponding to a reference signal port is It can be represented as. represents the channel estimate of the frequency domain unit. (1:1: end) indicates that values ​​increasing by 1 from 1 are obtained until the last value is obtained. Therefore, when one reference signal port corresponds to one angle-delay pair, it can be seen that the complex coefficients corresponding to the reference signal port are on each frequency domain unit and are also the sum of the channel estimate values ​​corresponding to the reference signal port.

[0318] As described above, the network device can load one angle vector into one reference signal port and individually load Q angle vectors contained in Q angle-delay pairs into P reference signal ports. In this case, it can be understood that one reference signal port corresponds to one angle-delay pair. Accordingly, for one reference signal port, the terminal device can obtain one complex coefficient corresponding to the reference signal port.

[0319] In this implementation, when there are multiple transport layers, it should be understood that the terminal device can obtain one complex coefficient corresponding to one reference signal port at each transport layer. Therefore, in this implementation, when the number of transport layers is Z and the number of reference signal ports is P, the aforementioned set of complex coefficients may include P×Z complex coefficients. Additionally, the terminal device can determine K complex coefficients from the P×Z complex coefficients included in the set of complex coefficients. The method by which the terminal device determines K complex coefficients from the P×Z complex coefficients is not limited to the embodiments of the present application.

[0320] In one example, the terminal device can determine K complex coefficients from P×Z complex coefficients. In this case, K ≤ P×Z. The value of K may be predefined in the protocol or may be instructed to the terminal device by the network device. When the network device instructs the terminal device to the value of K, the method may further include the following: the network device transmits instruction information #3, and instruction information #3 instructs the value of K. In response, the terminal device receives instruction information #3.

[0321] In this example, it can be understood that the K complex coefficients determined by the terminal device may be complex coefficients corresponding to S of the P reference signal ports, that is, K may be equal to S × Z. S is a positive integer and S ≤ P.

[0322] In another example, the terminal device can determine K complex coefficients from complex coefficients corresponding to S of the P reference signal ports, that is, the terminal device can determine K complex coefficients from S × Z complex coefficients. In this case, K ≤ S × Z. In this example, when determining the K complex coefficients, the terminal device must predetermine the values ​​of S and K or predetermine the value of S. The values ​​of S or K may be predefined in a protocol or may be instructed to the terminal device by a network device. When the network device instructs the terminal device to the values ​​of S or K, the method may further include the following: the network device transmits instruction information #4, and instruction information #4 instructs the values ​​of S and K, or instruction information #4 instructs the value of S. Correspondingly, the terminal device receives instruction information #4.

[0323] When the terminal device predetermines the value of S and does not predetermine the value of K, the terminal device can understand that the complex coefficients corresponding to the S reference signal ports can be used as K complex coefficients. That is, K = S × Z.

[0324] After the terminal device determines K complex coefficients, if the uplink resources allocated by the terminal device are sufficient to report the K complex coefficients, the terminal device can report all K complex coefficients to the network device. That is, the terminal device can generate first instruction information, the first instruction information indicates B complex coefficients, and B = K.

[0325] If the uplink resources allocated to the terminal device are insufficient to report K complex coefficients, the terminal device may determine B complex coefficients from K complex coefficients according to a preset priority rule and report B complex coefficients to the terminal device. That is, the terminal device may generate first instruction information, and the first instruction information indicates B complex coefficients. B < K.

[0326] Pre-set priority rules are not limited to the embodiments of the present application.

[0327] In one example, a preset priority rule can be associated with the index value of each complex coefficient among K complex coefficients.

[0328] The pre-set priority rules are It can be represented as, am. is the first among the K complex coefficients k Indicates the priority of complex coefficients. The smaller the value of , the more the k It indicates that the complex coefficient has higher priority. is determined based on K complex coefficients k Indicates the index value of the complex coefficient, is. In this case, each of the K complex coefficients is ( k It can be identified as ), and different ( k It can be seen that complex coefficients identified by ) have different priorities.

[0329] Specific forms are not limited to the embodiments of the present application.

[0330] for example, Is k It can be a monotonically increasing function related to . For example, is. In this case, k The smaller the size, the more k It indicates that the complex coefficient has higher priority.

[0331] In another example, Is k It can be a monotonically decreasing function related to . For example, is. In this case, k The larger the size, the more k It indicates that the complex coefficient has higher priority.

[0332] In another example, can be determined by the descending order of the amplitudes of K complex coefficients. In this case, The smaller the size, the more k It indicates that the complex coefficient has higher priority.

[0333] In another example, can be determined by the ascending order of the amplitudes of K complex coefficients. In this case, The larger the size, the more k It indicates that the complex coefficient has higher priority.

[0334] It should be understood that when is related to the amplitude order of K complex coefficients, the above method may further include the following: the terminal device transmits instruction information #5, and instruction information #5 is the sequence number of each complex coefficient k and index value It indicates the mapping relationship between them. In response, the network device receives instruction information #5. Instruction information #5 and the first instruction information may be carried in the same signaling or in different signalings. This is not limited to the present application.

[0335] In another example, a preset priority rule may be associated with the index value of a reference signal port corresponding to each of the K complex coefficients.

[0336] As explained above, the K complex coefficients may be complex coefficients corresponding to S reference signal ports. In this case, a preset priority rule may be associated with the index value of the reference signal port corresponding to each of the K complex coefficients among the S reference signal ports.

[0337] The pre-set priority rules are It can be represented as, am. is the first of S reference signal ports s Indicates the priority of complex coefficients corresponding to the reference signal port. The smaller the value of , the more the s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. is determined based on K complex coefficients s Indicates the index value of the reference signal port, and am.

[0338] In this case, each of the K complex coefficients is ( s Can be identified as ), and the same ( s Complex coefficients identified by ) have the same priority, and different ( s Complex coefficients identified by ) can be understood as having different priorities. For example, among the K complex coefficients, and also the sThe complex coefficients corresponding to the reference signal port are in one transmission layer s It includes one complex coefficient of the reference signal port, or in multiple transmission layers s It may include multiple complex coefficients of the reference signal port. Among the K complex coefficients, multiple complex coefficients are s When corresponding to a reference signal port, multiple complex coefficients have the same identifier(s) and the same priority.

[0339] Specific forms are not limited to the embodiments of the present application.

[0340] for example, Is s It can be a monotonically increasing function related to . For example, is. In this case, s The smaller the size, the more s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0341] In another example, Is s It can be a monotonically decreasing function related to . For example, is. In this case, s The larger the size, the more s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0342] In another example, can be determined by the descending order of the amplitudes of K complex coefficients. In this case, The smaller the size, the more s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. Specifically, In the process of determining, the complex coefficients used for amplitude alignment are among the K complex coefficients, and also the sIt may be the sum of the amplitudes of one or more complex coefficients corresponding to a reference signal port. For example, a first complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to the zeroth reference signal port, a second complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to the first reference signal port, ..., a third complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to the (S-1)th reference signal port. Next, the S complex coefficients are sorted in descending order of amplitude to obtain the index value of each reference signal port. Likewise, In the process of determining, the complex coefficient used for amplitude alignment may be the average value of the amplitudes of one or more complex coefficients corresponding to the s-th reference signal port, while also being among K complex coefficients. That is, the average value of the amplitudes of one or more complex coefficients corresponding to each of the S reference signal ports is calculated to obtain S complex coefficients, and then the S complex coefficients are sorted in descending order of amplitude to obtain the index value of each reference signal port. In the process of determining, the complex coefficients used for amplitude alignment are otherwise K complex coefficients, and also the s It may be the maximum value of the amplitude of one or more complex coefficients corresponding to the reference signal port. That is, after selecting the complex coefficient with the maximum amplitude from one or more complex coefficients corresponding to each of the S reference signal ports, the S complex coefficients are sorted in descending order of amplitude to obtain the index value of each reference signal port.

[0343] In another example, can be determined by the ascending order of the amplitudes of K complex coefficients. In this case, The larger the size, the more sIt indicates that the complex coefficient corresponding to the reference signal port has a higher priority. Specifically, In the process of determining, the complex coefficients used for amplitude alignment are among the K complex coefficients, and also the s It may be the sum of the amplitudes of one or more complex coefficients corresponding to a reference signal port. For example, a first complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to the zeroth reference signal port, a second complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to the first reference signal port, ..., a third complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to the (S-1)th reference signal port. Next, the S complex coefficients are sorted in ascending order of amplitude to obtain the index value of each reference signal port. Likewise, In the process of determining, the complex coefficients used for amplitude alignment are, alternatively, K complex coefficients and also the s It may be the average value of the amplitudes of one or more complex coefficients corresponding to the reference signal port. That is, the average value of the amplitudes of one or more complex coefficients corresponding to each of the S reference signal ports is calculated to obtain S complex coefficients, and then the S complex coefficients are sorted in ascending order of amplitude to obtain the index value of each reference signal port. In the process of determining, the complex coefficient used for amplitude alignment may be the maximum value of the amplitude of one or more complex coefficients that are among the K complex coefficients and also correspond to the s-th reference signal port. That is, after selecting the complex coefficient with the maximum amplitude from one or more complex coefficients corresponding to each of the S reference signal ports, the S complex coefficients are sorted in ascending order of amplitude to obtain the index value of each reference signal port.

[0344] It should be understood that when is related to the amplitude order of K complex coefficients, the above method may further include the following: the terminal device transmits instruction information #6, and instruction information #6 is the sequence number of each reference signal port of S reference signal ports. s and index value It indicates the mapping relationship between them. In response, the network device receives instruction information #6. Instruction information #6 and the first instruction information may be carried in the same signaling or in different signalings. This is not limited to the present application.

[0345] In another example, a preset priority rule can be associated with two items: the quantity Z of the transport layer and the index value of each complex coefficient among K complex coefficients.

[0346] The pre-set priority rules are It can be represented as, , am. K z represents the quantity of complex coefficients of the z-th transport layer among the Z transport layers, and am. is at the z-th transport layer K z Among the complex coefficients, the k z Indicates the priority of complex coefficients. The smaller the value of , the more the z-th transport layer K z Among the complex coefficients, the k z It indicates that the complex coefficient has higher priority. is in the z-th transport layer and also in the z-th transport layer K z The determined based on complex coefficients k z Indicates the index value of the complex coefficient, is. In this case, each of the K complex coefficients is ( k z , z Can be identified as ), and the same ( k z Complex coefficients identified as , z) have the same priority, and different ( k z Complex coefficients identified as , z) have different priorities.

[0347] Specific forms are not limited to the embodiments of the present application.

[0348] for example, Is k z It can be a monotonically increasing function related to . For example, is. In this case, at the z-th transport layer, k z The smaller the size, the more k z Indicates that the complex coefficient has a higher priority. In this case, the meaning of the pre-set priority rule is that the priorities of the K complex coefficients are in the following order: the 0th complex coefficient in the 1st transport layer, the 0th complex coefficient in the 2nd transport layer, ..., the 0th complex coefficient in the Zth transport layer; the 1st complex coefficient in the 1st transport layer, ..., the 1st complex coefficient in the Zth transport layer; ...; the ( K 1 -1) complex coefficients, ..., the (in the Z-th transmission layer K 1 -1) It means that it goes down to complex coefficients.

[0349] In another example, Is k z It can be a monotonically decreasing function related to . For example, is. In this case, at the z-th transport layer, k z The larger the size, the more k zIndicates that the complex coefficient has a high priority. In this case, the meaning of the pre-set priority rule is that the priority of the K complex coefficients is in the following order: the (in the first transport layer) K 1 -1) Complex coefficient, second transmission layer ( K 2 -1) complex coefficients,..., the (in the Z-th transmission layer K z -1) complex coefficient; the (in the first transmission layer K 1 -2) complex coefficients, ..., the (in the Z-th transmission layer K z -2) Complex coefficients; ...; it means going down to the 0th complex coefficient in the 1st transmission layer, ..., and the 0th complex coefficient in the Zth transmission layer.

[0350] In another example, Is K z It can be determined in descending order of the amplitudes of the complex coefficients. In this case, at the z-th transmission layer, The smaller the size, the more k z It indicates that the complex coefficient has higher priority.

[0351] In another example, Is k z It can be determined in ascending order of the amplitudes of the complex coefficients. In this case, at the z-th transmission layer, The larger the size, the more k z It indicates that the complex coefficient has higher priority.

[0352] When relating to the amplitude order of Kz complex coefficients, the meaning of the preset priority rule is that the priority of the K complex coefficients follows the following order: the complex coefficient with the largest amplitude in the first transport layer, the complex coefficient with the largest amplitude in the second transport layer, ..., the complex coefficient with the largest amplitude in the Zth transport layer; the complex coefficient with the second largest amplitude in the first transport layer, ..., the complex coefficient with the second largest amplitude in the Zth transport layer; ...; the complex coefficient with the smallest amplitude in the first transport layer, ..., the complex coefficient with the smallest amplitude in the Zth transport layer.

[0353] It should be understood that when the amplitude order of K complex coefficients is involved, the method may further include the following: a terminal device transmits instruction information #7, and instruction information #7 indicates the amplitude order of complex coefficients at each transport layer. Correspondingly, a network device receives instruction information #7. Instruction information #7 and the first instruction information may be carried in the same signaling or in different signalings. This is not limited in this application.

[0354] In another example, a preset priority rule can be associated with the following two items: the quantity Z of the transport layer and the index value of the reference signal port corresponding to each complex coefficient among the K complex coefficients.

[0355] As explained above, the K complex coefficients may be complex coefficients corresponding to S reference signal ports. In this case, the preset priority rule may be related to the following two items: the quantity Z of the transport layer and, among the S reference signal ports, the index value of the reference signal port corresponding to each complex coefficient of the K complex coefficients.

[0356] The pre-set priority rules are It can be represented as, , am. is the first of S reference signal ports in the z-th transport layer s z Indicates the priority of complex coefficients corresponding to the reference signal port. The smaller the value of, the more the zero in the transmission layer s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. is in the z-th transport layer and also K z The one determined based on complex coefficients s z Indicates the index value of the reference signal port, and am. K z represents the quantity of complex coefficients in the z-th transport layer, and is. In this case, each of the K complex coefficients is (z, s z Can be identified as ), and the same (z, s z Complex coefficients identified by ) have the same priority, and different (z, s z Complex coefficients identified by ) have different priorities.

[0357] Specific forms are not limited to the embodiments of the present application.

[0358] for example, Is s z It can be a monotonically increasing function related to . For example, is. In this case, at the z-th transport layer, s z The smaller the size, the more s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. go s z When it is a monotonically increasing function related to, the meaning of the preset priority rule is that the priority of S×Z complex coefficients of S reference signal ports in Z transport layers is in the following order: complex coefficient corresponding to the 0th reference signal port in the 1st transport layer, complex coefficient corresponding to the 0th reference signal port in the 2nd transport layer, ..., complex coefficient corresponding to the 0th reference signal port in the Zth transport layer; complex coefficient corresponding to the 1st reference signal port in the 1st transport layer, ..., complex coefficient corresponding to the 1st reference signal port in the Zth transport layer; ...; complex coefficient corresponding to the (S-1)th reference signal port in the 1st transport layer, ..., complex coefficient corresponding to the (S-1)th reference signal port in the Zth transport layer. When K complex coefficients are determined from S×Z complex coefficients, the priority of the K complex coefficients is the identifier (z, s z It can be determined based on the priority of ) and S×Z complex coefficients.

[0359] In another example, Is s z It can be a monotonically decreasing function related to . For example, is. In this case, at the z-th transport layer, s z The larger the size, the more s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. go s z When it is a monotonically decreasing function related to, the meaning of the preset priority rule is that the priority of S×Z complex coefficients of S reference signal ports in Z transport layers is in the following order: complex coefficient corresponding to the (S-1) reference signal port in the first transport layer, complex coefficient corresponding to the (S-1) reference signal port in the second transport layer, ..., complex coefficient corresponding to the (S-1) reference signal port in the Zth transport layer; complex coefficient corresponding to the (S-2) reference signal port in the first transport layer, ..., complex coefficient corresponding to the (S-2) reference signal port in the Zth transport layer; ...; complex coefficient corresponding to the 0 reference signal port in the first transport layer, ..., complex coefficient corresponding to the 0 reference signal port in the Zth transport layer. When K complex coefficients are determined from S×Z complex coefficients, the priority of the K complex coefficients is the identifier of each complex coefficient (z, s z It can be determined based on the priority of ) and S×Z complex coefficients.

[0360] In another example, Is K z It can be determined in descending order of the amplitudes of the complex coefficients. In this case, at the z-th transmission layer, The smaller the size, the more s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0361] In another example, Is K z It can be determined in ascending order of the amplitudes of the complex coefficients. In this case, at the z-th transmission layer, The larger the size, the more s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0362] go K z When relating to the amplitude order of complex coefficients, the meaning of the preset priority rule is that the priority of S×Z complex coefficients of S reference signal ports in Z transport layers follows the following order: the complex coefficient with the largest amplitude in the first transport layer, the complex coefficient with the largest amplitude in the second transport layer, ..., the complex coefficient with the largest amplitude in the Zth transport layer; the complex coefficient with the second largest amplitude in the first transport layer, ..., the complex coefficient with the second largest amplitude in the Zth transport layer; ...; the complex coefficient with the smallest amplitude in the first transport layer, ..., the complex coefficient with the smallest amplitude in the Zth transport layer.

[0363] go K z When determined in descending order of amplitude of complex coefficients, in the z-th transmission layer, the complex coefficient with the largest amplitude is When ga is 0, the s z It is a complex coefficient corresponding to the reference signal port; and the complex coefficient having the second largest amplitude is When ga is 1, the s z It is a complex coefficient corresponding to the reference signal port; ...; the complex coefficient with the smallest amplitude is When ga is S-1, the s z It is a complex coefficient corresponding to the reference signal port. go K z When determined in ascending order of amplitudes of complex coefficients, in the z-th transmission layer, the complex coefficient with the largest amplitude is When ga is S-1, the s z It is a complex coefficient corresponding to the reference signal port; and the complex coefficient having the second largest amplitude is When ga is s-2, the s z It is a complex coefficient corresponding to the reference signal port; ...; the complex coefficient with the smallest amplitude is When ga is 0, the s z It is a complex coefficient corresponding to the reference signal port.

[0364] When determining K complex coefficients from S×Z complex coefficients, the priority of the K complex coefficients is the identifier (z, ) of each complex coefficient s z (z, corresponding to ) It can be determined based on the priority of ) and S×Z complex coefficients.

[0365] go K z It should be understood that, when relating to the amplitude order of complex coefficients, the above method may further include the following: the terminal device transmits instruction information #8, and instruction information #8 is the sequence number of the reference signal port at each transport layer. s z and index value It indicates the mapping relationship between them. In response, the network device receives instruction information #8. Instruction information #8 and the first instruction information may be carried in the same signaling or in different signalings. This is not limited to the present application.

[0366] In a second possible implementation, when the quantity of angle-delay pairs corresponding to a single reference signal port is 1, the quantity of complex coefficients corresponding to the reference signal port, which are acquired by the terminal device, is T. That is, T0 = T1 = ... = T P-1 = T≥2.

[0367] As explained above, the network device can load T forms of a single angle-delay pair into a single reference signal port and Q angle-delay pairs into P reference signal ports individually. In this case, it can be seen that one reference signal port corresponds to one angle-delay pair. Accordingly, since loading T forms of a single angle-delay pair into a single reference signal port can be implemented by the network device shifting the angle-delay pair to T specific delay positions relative to the single reference signal port, the terminal device individually obtains one complex coefficient corresponding to the reference signal port at T specific delay positions.

[0368] In this implementation, when a terminal device determines T complex coefficients corresponding to each reference signal port at T specific delay locations, the T specific delay locations need to be determined in advance. The T specific delay locations may be predefined in a protocol or may be indicated to the terminal device by a network device. When the network device indicates the T specific delay locations to the terminal device, the method may further include the following: the network device transmits instruction information #9 (i.e., third instruction information), and instruction information #9 indicates T specific delay locations. In response, the terminal device receives instruction information #9.

[0369] After the terminal device determines T complex coefficients corresponding to each reference signal port, at one reference signal port, the terminal device may select one complex coefficient from the T complex coefficients corresponding to the reference signal port as the complex coefficient corresponding to the angle-delay pair actually corresponding to the reference signal port. For example, the terminal device may use the complex coefficient with the largest amplitude among the T complex coefficients corresponding to one reference signal port as the complex coefficient corresponding to the reference signal port. The method may further include the following: the terminal device transmits instruction information #10 (i.e., fourth instruction information), and instruction information #10 indicates a delay position corresponding to the complex coefficient selected by the terminal device at each reference signal port. Correspondingly, the network device receives instruction information #10. Instruction information #10 and the first instruction information may be carried in the same signaling or in different signalings. This is not limited in the present application.

[0370] In this implementation, when there are multiple transport layers, it should be understood that the terminal device can determine one complex coefficient corresponding to one reference signal port at each transport layer. Therefore, in this implementation, when the quantity of transport layers is Z and the quantity of reference signal ports is P, the aforementioned set of complex coefficients may include P×Z complex coefficients. Additionally, the terminal device can determine K complex coefficients from the P×Z complex coefficients included in the set of complex coefficients. For the method by which the terminal device determines K complex coefficients from the P×Z complex coefficients, refer to the description of the first possible implementation. For brevity, details are not described again here.

[0371] After the terminal device determines K complex coefficients, if the uplink resources allocated by the terminal device are sufficient to report the K complex coefficients, the terminal device can report all K complex coefficients to the network device. That is, the terminal device can generate first instruction information, the first instruction information indicates B complex coefficients, and B = K.

[0372] If the uplink resources allocated to the terminal device are insufficient to report K complex coefficients, the terminal device may determine B complex coefficients from K complex coefficients according to a preset priority rule and report B complex coefficients to the terminal device. That is, the terminal device may generate first instruction information, the first instruction information indicates B complex coefficients, and B < K.

[0373] The preset priority rules are not limited to the embodiments of this application. For details, refer to the description of the preset priority rules in the preceding first possible embodiment. For brevity, details are not described again herein.

[0374] In a third possible implementation, the terminal device obtains a quantity T of complex coefficients corresponding to a single reference signal port. That is, T0 = T1 = ... = T P-1 = T≥2.

[0375] As described above, a network device can load T angle-delay pairs into a single reference signal port. Correspondingly, for a single reference signal port, the terminal device can obtain T complex coefficients corresponding to the reference signal port. A total of P × T complex coefficients can be determined corresponding to P reference signal ports.

[0376] FIG. 7(b) is a schematic diagram showing that when four angle-delay pairs are loaded into a reference signal port, a terminal device obtains four complex coefficients corresponding to one reference signal port. As illustrated in FIG. 7(b), the first complex coefficient corresponding to one reference signal port is It can be represented as. represents the channel estimate in the frequency domain unit. (1:4:end) indicates that values ​​are acquired by incrementing from 1 to 4 until the last value is obtained. Therefore, it can be seen that the first complex coefficient is the sum of the channel estimates corresponding to the reference signal ports on the frequency domain units included in frequency domain unit group 1. The second complex coefficient corresponding to a single reference signal port is It can be represented as. represents the channel estimate in the frequency domain unit. (2:4:end) indicates that values ​​are acquired by incrementing from 2 to 4 until the last value is obtained. Therefore, it can be seen that the second complex coefficient is the sum of the channel estimates corresponding to the reference signal ports on the frequency domain units included in frequency domain unit group 2. The third complex coefficient corresponding to a single reference signal port is It can be represented as. represents the channel estimate in the frequency domain unit. (3:4:end) indicates that values ​​are acquired by incrementing from 3 to 4 until the last value is obtained. Therefore, it can be seen that the third complex coefficient is the sum of the channel estimates corresponding to the reference signal ports on the frequency domain units included in frequency domain unit group 3. The fourth complex coefficient corresponding to a single reference signal port is It can be represented as. represents the channel estimate in the frequency domain unit. (4:4:end) indicates that the value is obtained from 4 by incrementing by 4 until the last value is obtained. Therefore, it can be seen that the fourth complex coefficient is the sum of the channel estimate values ​​corresponding to the reference signal port on the frequency domain unit included in frequency domain unit group 4.

[0377] FIG. 10(b) is a schematic diagram of a terminal device obtaining two complex coefficients corresponding to one reference signal port when two angle-delay pairs are loaded into a reference signal port. As shown in FIG. 10(b), for Port 1, the terminal device obtains the complex coefficients corresponding to the angle-delay pair through calculation at delay position "0". It can obtain, and the terminal device obtains the complex coefficients corresponding to other angle-delay pairs through calculation at delay position "5" ...can be further obtained. For Port 2, the terminal device obtains the complex coefficients corresponding to the angle-delay pair through calculation at delay position "0". It can obtain, and the terminal device obtains the complex coefficients corresponding to other angle-delay pairs through calculation at delay position "5" You can obtain more.

[0378] As explained above, the network device can load M angle-delay pairs out of Q angle-delay pairs into P reference signal ports, and the number of angle-delay pairs loaded into each reference signal port is M p is. In response to this, for a single reference signal port, the terminal device has M corresponding to the reference signal port. p Complex coefficients can be obtained. Additionally, the terminal device further performs detection near the delay position "0" of the reference signal port using a specific delay range and delay search granularity, thereby T-M p Complex coefficients can be obtained. That is, the terminal device can obtain T complex coefficients corresponding to the reference signal ports. Corresponding to P reference signal ports, a total of P × T complex coefficients can be determined. The value of T is determined based on the delay range and delay search granularity for the search by the terminal device. TM additionally obtained by the terminal device through detection p It must be understood that the complex coefficients of the k complex coefficients may or may not correspond to actual angle-delay pairs.

[0379] As illustrated in FIG. 13, the network device individually loads four of the six angle-delay pairs into four reference signal ports. Correspondingly, the terminal device can individually obtain complex coefficients corresponding to the angle-delay pairs loaded into the four reference signal ports based on the precoded reference signal received at each reference signal port. Additionally, the terminal device can obtain additional complex coefficients by performing further detection near the delay position "0" of each reference signal port using a specific delay range (e.g., the dashed box in FIG. 13) and delay search granularity. Port 1 is used as an example. The network device loads angle-delay pair 1 into Port 1, which is equivalent to angle-delay pair 1 being translated to delay position "0" and angle-delay pair 2 also being translated to delay position "2". In other words, angle-delay pair 1 and angle-delay pair 2 still maintain the same delay interval. Assuming that the delay search range activated by the terminal device is the dashed box in FIG. 13 (including delay positions "0", "1", "2" and "3"), and that the delay search granularity is consistent with the delay interval obtained by uplink estimation, the terminal device can obtain four complex coefficients through calculation at Port 1. Only the complex coefficients obtained at time delay positions "0" and time delay "2" correspond to angle-delay pair 1 and angle-delay pair 2, respectively, while the remaining two complex coefficients do not correspond to any angle-delay pair and have amplitudes close to zero. Similarly, the terminal device can obtain four complex coefficients through calculation on each of the ports from Port 2 to Port 4.

[0380] FIG. 13 illustrates only examples where the search delay granularity of the terminal device matches the uplink delay estimated granularity. Alternatively, the search delay granularity of the terminal device may not match the uplink delay estimated granularity.

[0381] When determining T complex coefficients corresponding to each reference signal port, the terminal device needs to predetermine a delay search range and a delay search granularity. The delay search range and the delay search granularity may be predefined in a protocol or instructed to the terminal device by a network device. Alternatively, one of the delay search range and the delay search granularity may be predefined in a protocol, and the other may be instructed to the terminal device by a network device. When the network device instructs the terminal device the delay search range and / or delay search granularity, the method may further include the following: the network device transmits instruction information #11 (i.e., sixth instruction information), and instruction information #11 instructs the delay search range and / or delay search granularity. In response, the terminal device receives instruction information #11.

[0382] It should be understood that when a terminal device performs detection to obtain additional complex coefficients, in the process in which the terminal device transmits the complex coefficients to a network device, the method may further include the following: the terminal device transmits instruction information #12 (i.e., seventh instruction information), wherein instruction information #12 indicates a delay position corresponding to each complex coefficient reported by the terminal device. Correspondingly, the network device receives instruction information #12. Instruction information #12 and the first instruction information may be carried in the same signaling or in different signalings. This is not limited in the present application.

[0383] In this implementation, when there are multiple transport layers, it should be understood that the terminal device can determine P×T complex coefficients in each transport layer. Therefore, in this implementation, when the number of transport layers is Z, the aforementioned set of complex coefficients may include P×T×Z complex coefficients. Additionally, the terminal device can determine K complex coefficients from the P×T×Z complex coefficients included in the set of complex coefficients. The method by which the terminal device determines K complex coefficients from the P×T×Z complex coefficients is not limited to the embodiments of this application.

[0384] In one example, the terminal device can determine K complex coefficients from P × T × Z complex coefficients. In this case, K ≤ P × T × Z. The value of K may be predefined in the protocol or may be instructed to the terminal device by the network device. When the network device instructs the terminal device to the value of K, the method may further include the following: the network device transmits instruction information #3, and instruction information #3 instructs the value of K. In response, the terminal device receives instruction information #3.

[0385] In this example, it can be understood that the K complex coefficients determined by the terminal device may be complex coefficients corresponding to S of the P reference signal ports, that is, K may be equal to S × T × Z. The K complex coefficients determined by the terminal device may be some of the complex coefficients corresponding to the P reference signal ports. In other words, K may be equal to P × U × Z, where U is a positive integer and U < T. Alternatively, the K complex coefficients determined by the terminal device may be some of the complex coefficients corresponding to the S reference signal ports, that is, K may be equal to S × U × Z.

[0386] In another example, the terminal device can determine K complex coefficients from U complex coefficients corresponding to each of S reference signal ports, that is, the terminal device can determine K complex coefficients from S × U × Z complex coefficients. In this case, K ≤ S × U × Z. In this example, when determining the K complex coefficients, the terminal device predetermines the values ​​of S, U, and K, or predetermines the values ​​of S and U, or predetermines the value of U, or the value of S. The values ​​of S, U, or K may be predefined in the protocol or may be instructed to the terminal device by the network device. When a network device instructs a terminal device to a value of S, U, or K, the method may further include the following: the network device transmits instruction information #13, and instruction information #13 instructs the value of S, the value of U, and the value of K, or instruction information #13 instructs the value of S and the value of U, or instruction information #13 instructs the value of U, or instruction information #13 instructs the value of S. Correspondingly, the terminal device receives instruction information #13.

[0387] Optionally, as described above, when a network device loads T angle-delay pairs into a single reference signal port using frequency domain unit groups and multiple delay positions, the value of U may be determined using the quantity E' of the selected frequency domain unit groups and / or the quantity F' of the selected delay positions. E' < E. F' < F. E is the total quantity of frequency domain unit groups on a single reference signal port. F is the total quantity of delay positions loaded with different angle-delay pairs on a single reference signal port. For example, U may be equal to E'×F, or U may be equal to E×F', or U = E'×F'. The values ​​of E' and / or F' may be predefined in the protocol or may be instructed to the terminal device by the network device.

[0388] When the terminal device predetermines the values ​​of S and U but does not predetermine the value of K, the terminal device can understand that the U complex coefficients corresponding to each of the S reference signal ports can be used as K complex coefficients. That is, K = S × U × Z.

[0389] When the terminal device predetermines the value of U but does not predetermine the values ​​of S and K, the terminal device can further understand that the U complex coefficients corresponding to each of the P reference signal ports can be used as K complex coefficients. That is, K = P × U × Z. It can also be understood as S = P.

[0390] When the terminal device predetermines the value of S but does not predetermine the values ​​of U and K, the terminal device can further understand that the T complex coefficients corresponding to each of the S reference signal ports can be used as K complex coefficients. That is, K = S × T × Z. It can also be understood as U = T.

[0391] After the terminal device determines K complex coefficients, if the uplink resources allocated by the terminal device are sufficient to report the K complex coefficients, the terminal device can report all K complex coefficients to the network device. That is, the terminal device can generate first instruction information, the first instruction information indicates B complex coefficients, and B = K.

[0392] If the uplink resources allocated to the terminal device are insufficient to report K complex coefficients, the terminal device may determine B complex coefficients from K complex coefficients according to a preset priority rule and report B complex coefficients to the terminal device. That is, the terminal device may generate first instruction information, the first instruction information indicates B complex coefficients, and B < K.

[0393] Pre-set priority rules are not limited to the embodiments of the present application.

[0394] Example 1: A preset priority rule can be associated with the index value of each complex coefficient among K complex coefficients.

[0395] Specifically, for the pre-set priority rules in this example, refer to the description of the first possible implementation. For the sake of brevity, details are not described again here.

[0396] Example 2: Pre-set priority rules can be associated with the index value of a reference signal port corresponding to each complex coefficient in K complex coefficients.

[0397] As explained above, the K complex coefficients may be complex coefficients corresponding to S reference signal ports. In this case, a preset priority rule may be associated with the index value of the reference signal port corresponding to each of the K complex coefficients among the S reference signal ports.

[0398] The pre-set priority rules are It can be represented as, am. is the first of S reference signal ports s Indicates the priority of complex coefficients corresponding to the reference signal port. The smaller the value of , the more the s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. is determined based on K complex coefficients s Indicates the index value of the reference signal port, and am.

[0399] In this case, each of the K complex coefficients is ( s Can be identified as ), and the same ( s Complex coefficients identified by ) have the same priority, and different ( s The complex coefficients identified by ) can be understood as having different priorities. As explained above, the terminal device can determine K complex coefficients from U complex coefficients corresponding to each of the S reference signal ports. Therefore, while being among the K complex coefficients, also the s It can be seen that there may be one or more complex coefficients corresponding to the reference signal port. Among the K complex coefficients, multiple complex coefficients are s When corresponding to a reference signal port, multiple complex coefficients have the same identifier ( s It has ) and has the same priority.

[0400] Specific forms are not limited to the embodiments of the present application.

[0401] for example, Is s It can be a monotonically increasing function related to . For example, is. In this case, s The smaller the size, the more s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0402] In another example, Is s It can be a monotonically decreasing function related to . For example, is. In this case, s The larger the size, the more s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority.

[0403] In another example, can be determined by the descending order of the amplitudes of K complex coefficients. In this case, The smaller the size, the more s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. Specifically, In the process of determining, the complex coefficients used for amplitude alignment are among the K complex coefficients, and also the s It may be the sum of the amplitudes of one or more complex coefficients corresponding to a reference signal port. For example, a first complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to the zeroth reference signal port, a second complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to the first reference signal port, ..., a third complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to the (S-1)th reference signal port. Next, the S complex coefficients are sorted in descending order of amplitude to obtain the index value of each reference signal port. Likewise, In the process of determining, the complex coefficient used for amplitude alignment may be the average value of the amplitudes of one or more complex coefficients corresponding to the s-th reference signal port, while also being among K complex coefficients. That is, the average value of the amplitudes of one or more complex coefficients corresponding to each of the S reference signal ports is calculated to obtain S complex coefficients, and then the S complex coefficients are sorted in descending order of amplitude to obtain the index value of each reference signal port. In the process of determining, the complex coefficients used for amplitude alignment are otherwise K complex coefficients, and also the s It may be the maximum value of the amplitude of one or more complex coefficients corresponding to the reference signal port. That is, after selecting the complex coefficient with the maximum amplitude from one or more complex coefficients corresponding to each of the S reference signal ports, the S complex coefficients are sorted in descending order of amplitude to obtain the index value of each reference signal port.

[0404] In another example, can be determined by the ascending order of the amplitudes of K complex coefficients. In this case, The larger the size, the more s It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. Specifically, In the process of determining, the complex coefficients used for amplitude alignment are among the K complex coefficients, and also the sIt may be the sum of the amplitudes of one or more complex coefficients corresponding to a reference signal port. For example, a first complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to the zeroth reference signal port, a second complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to the first reference signal port, ..., a third complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to the (S-1)th reference signal port. Next, the S complex coefficients are sorted in ascending order of amplitude to obtain the index value of each reference signal port. Likewise, In the process of determining, the complex coefficients used for amplitude alignment are, alternatively, K complex coefficients and also the s It may be the average value of the amplitudes of one or more complex coefficients corresponding to the reference signal port. That is, the average value of the amplitudes of one or more complex coefficients corresponding to each of the S reference signal ports is calculated to obtain S complex coefficients, and then the S complex coefficients are sorted in ascending order of amplitude to obtain the index value of each reference signal port. In the process of determining, the complex coefficient used for amplitude alignment may be the maximum value of the amplitude of one or more complex coefficients that are among the K complex coefficients and also correspond to the s-th reference signal port. That is, after selecting the complex coefficient with the maximum amplitude from one or more complex coefficients corresponding to each of the S reference signal ports, the S complex coefficients are sorted in ascending order of amplitude to obtain the index value of each reference signal port.

[0405] It should be understood that when is related to the amplitude order of K complex coefficients, the above method may further include the following: the terminal device transmits instruction information #6, and instruction information #6 is the sequence number of each reference signal port of S reference signal ports. s and index value It indicates the mapping relationship between them. In response, the network device receives instruction information #6. Instruction information #6 and the first instruction information may be carried in the same signaling or in different signalings. This is not limited to the present application.

[0406] Example 3: Pre-set priority rules can be related to the following two items: the quantity Z of the transport layer and the index value of each complex coefficient among K complex coefficients.

[0407] Specifically, for the pre-set priority rules in this example, refer to the description of the first possible implementation. For the sake of brevity, details are not described again here.

[0408] Example 4: Pre-set priority rules may be related to the following two items: the quantity Z of the transport layer and the index value of the reference signal port corresponding to each complex coefficient in K complex coefficients.

[0409] As explained above, the K complex coefficients may be complex coefficients corresponding to S reference signal ports. In this case, the preset priority rule may be related to the following two items: the quantity Z of the transport layer and, among the S reference signal ports, the index value of the reference signal port corresponding to each complex coefficient of the K complex coefficients.

[0410] The pre-set priority rules are It can be represented as, , am. is the first of S reference signal ports in the z-th transport layer s z Indicates the priority of complex coefficients corresponding to the reference signal port. The smaller the value of, the more the zero in the transmission layer s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. is in the z-th transport layer and also K z The one determined based on complex coefficients s z Indicates the index value of the reference signal port, and am. K z represents the quantity of complex coefficients in the z-th transport layer, and am.

[0411] In this case, each of the K complex coefficients is (z, s z Can be identified as ), and the same (z, s z Complex coefficients identified by ) have the same priority, and different (z, s z It can be understood that the complex coefficients identified by ) have different priorities. As explained above, in the z-th transport layer, the s z The quantity of complex coefficients corresponding to the reference signal port is U. Therefore, among the K complex coefficients, the z-th transmission layer s z It can be seen that there exists one or more complex coefficients corresponding to the reference signal port. Among the K complex coefficients, multiple complex coefficients are in the z-th transmission layer s z When corresponding to a reference signal port, multiple complex coefficients have the same identifier (z, s z It has ) and has the same priority.

[0412] Specific forms are not limited to the embodiments of the present application.

[0413] for example, Is s z It can be a monotonically increasing function related to . For example, is. In this case, at the z-th transport layer, s z The smaller the size, the more s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. go s z When it is a monotonically increasing function related to, the meaning of the preset priority rule is that the priority of the S×Z×U complex coefficients of S reference signal ports in Z transport layers is in the following order: U complex coefficients corresponding to the 0th reference signal port in the 1st transport layer, U complex coefficients corresponding to the 0th reference signal port in the 2nd transport layer, ..., U complex coefficients corresponding to the 0th reference signal port in the Zth transport layer; U complex coefficients corresponding to the 1st reference signal port in the 1st transport layer, ..., U complex coefficients corresponding to the 1st reference signal port in the Zth transport layer; ...; U complex coefficients corresponding to the (S-1)th reference signal port in the 1st transport layer, ..., U complex coefficients corresponding to the (S-1)th reference signal port in the Zth transport layer. When K complex coefficients are determined from S×Z×U complex coefficients, the priority of the K complex coefficients is the identifier of each complex coefficient (z, s z It can be determined based on the priority of ) and S×Z×U complex coefficients.

[0414] In another example, Is s z It can be a monotonically decreasing function related to . For example, is. In this case, at the z-th transport layer, s z The larger the size, the more s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. go s z When it is a monotonically decreasing function related to, the meaning of the preset priority rule is that the priority of the S×Z×U complex coefficients of S reference signal ports in Z transport layers follows the following order: U complex coefficients corresponding to the (S-1) reference signal port in the first transport layer, complex coefficients corresponding to the (S-1) reference signal port in the second transport layer, ..., U complex coefficients corresponding to the (S-1) reference signal port in the Zth transport layer; U complex coefficients corresponding to the (S-2) reference signal port in the first transport layer, ..., U complex coefficients corresponding to the (S-2) reference signal port in the Zth transport layer; ...; U complex coefficients corresponding to the 0 reference signal port in the first transport layer, ..., U complex coefficients corresponding to the 0 reference signal port in the Zth transport layer. When K complex coefficients are determined from S×Z×U complex coefficients, the priority of the K complex coefficients is the identifier of each complex coefficient (z, s z It can be determined based on the priority of ) and S×Z×U complex coefficients.

[0415] In another example, Is K z It can be determined in descending order of the amplitudes of the complex coefficients. In this case, at the z-th transmission layer, The smaller the size, the more s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. Specifically, In the process of determining, the complex coefficients used for amplitude alignment are among the K complex coefficients, and also in the z-th transmission layer, the s z It may be the sum of the amplitudes of one or more complex coefficients corresponding to a reference signal port. For example, a first complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to a zero reference signal port in the z-th transmission layer, a second complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to a first reference signal port in the z-th transmission layer, ... and a third complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to a (S-1)-th reference signal port in the z-th transmission layer. Next, the S complex coefficients are sorted in descending order of amplitude to obtain the index value of each reference signal port in the z-th transmission layer. In the process of determining, the complex coefficients used for amplitude alignment are, alternatively, K complex coefficients, and also the z-th in the transmission layer s It may be the average value of the amplitudes of one or more complex coefficients corresponding to the reference signal port. That is, the average value of the amplitudes of one or more complex coefficients corresponding to each of the S reference signal ports is calculated at the z-th transport layer to obtain S complex coefficients, and then the S complex coefficients are sorted in descending order of amplitude to obtain the index value of each reference signal port at the z-th transport layer. In the process of determining, the complex coefficients used for amplitude alignment are among the K complex coefficients, and also the z-th in the transmission layer s z It may be the maximum value of the amplitude of one or more complex coefficients corresponding to the reference signal port. That is, in the z-th transport layer, after selecting the complex coefficient having the maximum amplitude from one or more complex coefficients corresponding to each of the S reference signal ports, the S complex coefficients are sorted in descending order of amplitude to obtain the index value of each reference signal port in the z-th transport layer.

[0416] In another example, go K z It can be determined in ascending order of the amplitudes of the complex coefficients. In this case, at the z-th transmission layer, The larger the size, the more s z It indicates that the complex coefficient corresponding to the reference signal port has a higher priority. Specifically, In the process of determining, the complex coefficients used for amplitude alignment are among the K complex coefficients, and also the z-th in the transmission layer s z It may be the sum of the amplitudes of one or more complex coefficients corresponding to a reference signal port. For example, a first complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to a zero reference signal port in the z-th transmission layer, a second complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to a first reference signal port in the z-th transmission layer, ... and a third complex coefficient is obtained by performing a summation on one or more complex coefficients that are among K complex coefficients and also correspond to a (S-1)-th reference signal port in the z-th transmission layer. Next, the S complex coefficients are sorted in ascending order of amplitude to obtain the index value of each reference signal port in the z-th transmission layer. In the process of determining, the complex coefficients used for amplitude alignment are, alternatively, K complex coefficients, and also the z-th in the transmission layer s z It may be the average value of the amplitudes of one or more complex coefficients corresponding to the reference signal port. That is, the average value of the amplitudes of one or more complex coefficients corresponding to each of the S reference signal ports is calculated at the z-th transport layer to obtain S complex coefficients, and then the S complex coefficients are sorted in ascending order of amplitude to obtain the index value of each reference signal port at the z-th transport layer. In the process of determining, the complex coefficients used for amplitude alignment are among the K complex coefficients, and also the z-th in the transmission layer s z It may be the maximum value of the amplitude of one or more complex coefficients corresponding to the reference signal port. That is, in the z-th transport layer, after selecting the complex coefficient having the maximum amplitude from one or more complex coefficients corresponding to each of the S reference signal ports, the S complex coefficients are sorted in ascending order of amplitude to obtain the index value of each reference signal port in the z-th transport layer.

[0417] go K z When relating to the amplitude order of complex coefficients, the meaning of the preset priority rule is that the priority of S×Z×U complex coefficients of S reference signal ports in Z transport layers is in the following order: U complex coefficients corresponding to the reference signal port corresponding to the complex coefficient with the largest amplitude in the first transport layer, U complex coefficients corresponding to the reference signal port corresponding to the complex coefficient with the largest amplitude in the second transport layer, ..., U complex coefficients corresponding to the reference signal port corresponding to the complex coefficient with the largest amplitude in the Zth transport layer; U complex coefficients corresponding to the reference signal port corresponding to the complex coefficient with the second largest amplitude in the first transport layer, ..., U complex coefficients corresponding to the reference signal port corresponding to the complex coefficient with the second largest amplitude in the Zth transport layer; ...; It means that U complex coefficients corresponding to the reference signal port corresponding to the complex coefficient with the smallest amplitude in the first transport layer, ..., descend to U complex coefficients corresponding to the reference signal port corresponding to the complex coefficient with the smallest amplitude in the Zth transport layer. It can be understood that the complex coefficient used for amplitude alignment in each transport layer may be the complex coefficient with the largest amplitude among the U complex coefficients corresponding to each reference signal port, may be the sum of the U complex coefficients corresponding to each reference signal port, or may be the average value of the U complex coefficients corresponding to each reference signal port.

[0418] go K z When determined in descending order of amplitude of complex coefficients, in the z-th transmission layer, the reference signal port corresponding to the complex coefficient with the largest amplitude is The case when is 0 s z It is a reference signal port; and the reference signal port corresponding to the complex coefficient having the second largest amplitude is The case when ga is 1s z It is a reference signal port; ...; the reference signal port corresponding to the complex coefficient having the smallest amplitude is When ga is S-1, the s z It is a reference signal port. go K z When determined in ascending order of the amplitudes of the complex coefficients, in the z-th transmission layer, the reference signal port corresponding to the complex coefficient with the largest amplitude is When ga is S-1, the s z It is a reference signal port; and the reference signal port corresponding to the complex coefficient having the second largest amplitude is The case when s-2 s z It is a reference signal port; ...; the reference signal port corresponding to the complex coefficient having the smallest amplitude is The case when is 0 s z It is a reference signal port.

[0419] When determining K complex coefficients from S × Z × U complex coefficients, the priority of the K complex coefficients is the identifier of each complex coefficient (z, s z (z, corresponding to ) It can be determined based on the priority order of ) and S×Z×U complex coefficients.

[0420] It should be understood that when the amplitude order of K complex coefficients is involved, the method may further include the following: a terminal device transmits instruction information #7, and instruction information #7 indicates the amplitude order of complex coefficients at each transport layer. Correspondingly, a network device receives instruction information #7. Instruction information #7 and the first instruction information may be carried in the same signaling or in different signalings. This is not limited in this application.

[0421] Example 5: Pre-set priority rules may be related to the following two items: the index value of the reference signal port corresponding to each complex coefficient in K complex coefficients and the index value of the reference signal port corresponding to each complex coefficient in K complex coefficients for the corresponding reference signal port.

[0422] As explained above, K complex coefficients can be determined from U complex coefficients corresponding to each of the S reference signal ports. In this case, a preset priority rule may be related to the following two items: the index value of the reference signal port corresponding to each of the K complex coefficients in the S reference signal ports, and the index value of each complex coefficient among the K complex coefficients among the U complex coefficients corresponding to the corresponding reference signal port.

[0423] The pre-set priority rules are It can be represented as, and am. is the first of S reference signal ports s Corresponding to the reference signal port, also s The one on the reference signal port u s Indicates the priority of complex coefficients. The smaller the value of , the more among the S reference signal ports the s Corresponding to the reference signal port, also s The one on the reference signal port u s It indicates that the complex coefficient has a higher priority. is determined based on K complex coefficients s Indicates the index value of the reference signal port, And, is in K complex coefficients and also the s The one determined based on the complex coefficients corresponding to the reference signal port u s Indicates the index value of the complex coefficient, am.

[0424] In this case, each of the K complex coefficients is ( s , u s Can be identified as ), and the same ( s , u s Complex coefficients identified by ) have the same priority, and different ( s , u s It can be understood that the complex coefficients identified by ) have different priorities. As explained above, in each of the Z transport layers, the terminal device, the s U complex coefficients corresponding to the reference signal port can be obtained. Therefore, while being in K complex coefficients, also the s The reference signal port corresponding to the u s Complex coefficients are the first in a single transmission layer u s It can be a complex coefficient, or a second in multiple transmission layers u s It can be understood that it may be a complex coefficient. While existing in K complex coefficients, it is also the s The reference signal port corresponding to the u s The complex coefficients in multiple transmission layers u s If it is a complex coefficient, the number in multiple transmission layers u s Complex coefficients are the same identifier ( s , u s ) and have the same priority.

[0425] Specific forms of are not limited to the embodiments of this application. For details, refer to Example 2 above. Refer to the explanation. For the sake of brevity, details are not explained again here.

[0426] Specific forms are not limited to the embodiments of the present application.

[0427] for example, Is u s It can be a monotonically increasing function related to . For example, It is. In this case, the s At the reference signal port, u s The smaller the value, the more the corresponding element u s It indicates that the complex coefficient has higher priority.

[0428] In another example, Is u s It can be a monotonically decreasing function related to . For example, is. In this case, my s At the reference signal port, u s The larger the value, the more the corresponding element u s It indicates that the complex coefficient has higher priority.

[0429] As another example, is in K complex coefficients and also the s It can be determined in descending order of the amplitudes of the complex coefficients corresponding to the reference signal port. In this case, the s At the reference signal port, The smaller the value, the more the corresponding element u s It indicates that the complex coefficient has higher priority.

[0430] For example, where K = S×Z×U, there are K complex coefficients and also the s In descending order of the amplitude of the complex coefficients corresponding to the reference signal port Explains the method for determining . When K = S×Z×U, it has K complex coefficients and is also the s It can be seen that the quantity of complex coefficients corresponding to the reference signal port is Z×U. In the process of determining, the complex coefficients used for amplitude alignment are, at each transport layer, the s Each corresponding to the reference signal port u s It can be the sum of the amplitudes of complex coefficients. For example, in Z transmission layers, the s A summation is performed on the zero complex coefficient corresponding to the reference signal port to obtain the first complex coefficient, and in Z transmission layers, the s A second complex coefficient is obtained by performing a summation on the first complex coefficient corresponding to the reference signal port, and ... in Z transmission layers, the s The (U-1) complex coefficients corresponding to the reference signal port are summed to obtain the U complex coefficient. Next, the U complex coefficients are sorted in descending order of amplitude to obtain the s The reference signal port corresponding to the u s Obtain the index value of the complex coefficient. Similarly, In the process of determining, the complex coefficients used for amplitude alignment are, otherwise, at each transport layer, the s The reference signal port corresponding to the u s It can be the average value of the amplitude of the complex coefficients. In the process of determining, the complex coefficients used for amplitude alignment are at each transport layer s Each corresponding to the reference signal port u s It can be the maximum value of the amplitude of the complex coefficient.

[0431] In another example, is in K complex coefficients and also the s It can be determined in ascending order of the amplitudes of the complex coefficients corresponding to the reference signal port. In this case, the s At the reference signal port, The larger the value, the more the corresponding element u s It indicates that the complex coefficient has higher priority.

[0432] For example, where K = S×Z×U, there are K complex coefficients and also the s In ascending order of the amplitudes of the complex coefficients corresponding to the reference signal port Explains the method for determining . When K = S×Z×U, it has K complex coefficients and is also the s It can be seen that the quantity of complex coefficients corresponding to the reference signal port is Z×U. In the process of determining, the complex coefficients used for amplitude alignment are at each transport layer s Each corresponding to the reference signal port u s It can be the sum of the amplitudes of complex coefficients. For example, in Z transmission layers, the s A summation is performed on the zero complex coefficient corresponding to the reference signal port to obtain the first complex coefficient, and in Z transmission layers, the s A second complex coefficient is obtained by performing a summation on the first complex coefficient corresponding to the reference signal port, and ... in Z transmission layers, the s The (U-1) complex coefficients corresponding to the reference signal port are summed to obtain the U complex coefficients. Next, the U complex coefficients are sorted in ascending order of amplitude to obtain the s The reference signal port corresponding to the u s Obtain the index value of the complex coefficient. Similarly, In the process of determining, the complex coefficients used for amplitude alignment are, otherwise, at each transport layer, the s The reference signal port corresponding to the u s It can be the average value of the amplitude of the complex coefficients. In the process of determining, the complex coefficients used for amplitude alignment are at each transport layer s Each corresponding to the reference signal port u s It can be the maximum value of the amplitude of the complex coefficient.

[0433] When K < S×Z×U, it has K complex coefficients and is also the s It can be understood that the number of complex coefficients corresponding to the reference signal port is smaller than Z×U. For example, having K complex coefficients and also the s The reference signal port corresponding to the u s The complex coefficients are the Z' in the transport layer u s It is a complex coefficient, where Z' < Z. In another example, it has K complex coefficients and is also the z-th of the transmission layer. s The quantity of complex coefficients corresponding to the reference signal port can be U', where U' < U.

[0434] Gaje s It should be understood that, when relating to the amplitude sequence of complex coefficients corresponding to the reference signal port, the above method may further include the following: the terminal device transmits instruction information #14, where instruction information #14 is the sequence number of the complex coefficient on each reference signal port u s and index value It indicates the mapping relationship between them. In response, the network device receives instruction information #14. Instruction information #14 and the first instruction information may be carried in the same signaling or in different signalings. This is not limited in this application.

[0435] The meaning of the priority rule described above is that the priority of the S×Z×U complex coefficients of the S reference signal ports in Z transport layers follows the following order: the first complex coefficient corresponding to the first reference signal port in each transport layer, the second complex coefficient corresponding to the first reference signal port in each transport layer, ..., the U complex coefficient corresponding to the first reference signal port in each transport layer; the first complex coefficient corresponding to the second reference signal port in each transport layer, ..., the U complex coefficient corresponding to the second reference signal port in each transport layer; ...; the first complex coefficient corresponding to the S reference signal port in each transport layer, ..., the U complex coefficient corresponding to the S reference signal port in each transport layer.

[0436] The first reference signal port is The corresponding element when ga is 0 s It is a reference signal port, and the second reference signal port is The corresponding element when ga is 1 s It is a reference signal port, and ..., the S reference signal port is The corresponding element when is S-1 s It is a reference signal. When is determined in ascending order of the amplitudes of K complex coefficients, the first reference signal port is The corresponding element when is S-1 s It is a reference signal port, and the second reference signal port is The corresponding element when is S-2 s It is a reference signal port, and ..., the S reference signal port is The corresponding element when ga is 0 s It is a reference signal port.

[0437] The first complex coefficient is The corresponding element when ga is 0 u s It is a complex coefficient, and the second complex coefficient is The corresponding element when ga is 1 u s It is a complex coefficient, and ..., the U complex coefficient is The corresponding element when ga is U-1 u s It is a complex coefficient. is in k complex coefficients and also the s When determined in ascending order of the amplitudes of the complex coefficients corresponding to the reference signal port, the first complex coefficient is The corresponding element when ga is U-1 u s It is a complex coefficient, and the second complex coefficient is The corresponding point when it is U-2 u s It is a complex coefficient, and ..., the U complex coefficient is The corresponding element when ga is 0 u s It is a complex coefficient.

[0438] When determining K complex coefficients from S×Z×U complex coefficients, the priority of the K complex coefficients is the identifier of each complex coefficient ( s , u s (corresponding to ) , It can be determined based on the priority of ) and S×Z×U complex coefficients.

[0439] The pre-set priority rules are It can be represented as, , am. is the first of S reference signal ports s Corresponding to the reference signal port, also s The one on the reference signal port u s Indicates the priority of complex coefficients. The smaller the value of , the more among the S reference signal ports the s Corresponding to the reference signal port, also s The one on the reference signal port u s It indicates that the complex coefficient has higher priority. is the number determined based on K complex coefficients s Indicates the index value of the reference signal port, and am. is in k complex coefficients and also the s The one determined based on the complex coefficients corresponding to the reference signal port u s Indicates the index value of the complex coefficient, am.

[0440] In this case, each of the K complex coefficients is ( s , u s Can be identified as ), and the same ( s , u s Complex coefficients identified by ) have the same priority, and different ( s , u s It can be understood that the complex coefficients identified by ) have different priorities. As explained above, in each of the Z transport layers, the terminal device, the s U complex coefficients corresponding to the reference signal port can be obtained. Therefore, while being in K complex coefficients, also the s The reference signal port corresponding to the u s Complex coefficients are the first in a single transmission layer u s It may be a complex coefficient, or a second in multiple transmission layers u s It can be understood that it may be a complex coefficient. While existing in K complex coefficients, it is also the s The reference signal port corresponding to the u s The complex coefficients in multiple transmission layers u s If it is a complex coefficient, the number in multiple transmission layers u s Complex coefficients are the same identifier ( s , u s ) and have the same priority.

[0441] The specific form of is not limited to the embodiments of this application. For details, refer to Example 2 above. Refer to the explanation. For the sake of brevity, details are not explained again here.

[0442] However, in this implementation, go s When it is a monotonically increasing function related to, the s The reference signal port corresponding to the u s The priority of complex coefficients is ( s +1) The one corresponding to the reference signal port u s You must understand that it has a higher priority than complex coefficients. go s When it is a monotonically decreasing function related to, the s The reference signal port corresponding to the u s The priority of complex coefficients is ( s +1) The one corresponding to the reference signal port u s It has a lower priority than complex coefficients. s The reference signal port corresponding to the u s The complex coefficients are s The index value on the reference signal port u It is a complex coefficient, and the ( s +1) The one corresponding to the reference signal port u s The complex coefficients are the ( s +1) The index value on the reference signal port u It is a complex coefficient, and am.

[0443] When is determined in descending order of the amplitudes of K complex coefficients, the s The reference signal port corresponding to the u s The priority of complex coefficients is ( s '+1) The reference signal port corresponding to the u s It has a higher priority than complex coefficients. When determining in ascending order of the amplitudes of K complex coefficients, the s The reference signal port corresponding to the u s The priority of complex coefficients is ( s '+1) The reference signal port corresponding to the u s It has a lower priority than complex coefficients. s The reference signal port corresponding to the u s The complex coefficients are s The index value on the reference signal port u It is a complex coefficient, and the s The reference signal port has an index value s It is a reference signal port, and the ( s '+1) The reference signal port corresponding to the u s The complex coefficients are the ( s The index value on the '+1) reference signal port u It is a complex coefficient, and the ( s '+1) The reference signal port has an index value s It is a reference signal port of +1, and here am.

[0444] Specific forms are not limited to the embodiments of this application. For details, see the preceding Refer to the explanation. For the sake of brevity, details are not explained again here.

[0445] The meaning of the priority rule explained above is that the priority of the S×Z×U complex coefficients of S reference signal ports in Z transport layers follows the following order: the first complex coefficient corresponding to the first reference signal port in each transport layer, the first complex coefficient corresponding to the second reference signal port in each transport layer, ..., the first complex coefficient corresponding to the S-th reference signal port in each transport layer; the second complex coefficient corresponding to the first reference signal port in each transport layer, ..., the second complex coefficient corresponding to the S-th reference signal port in each transport layer; ...; the U-th complex coefficient corresponding to the first reference signal port in each transport layer, ..., and the U-th complex coefficient corresponding to the S-th reference signal port in each transport layer.

[0446] The first reference signal port is The corresponding element when ga is 0 s It is a reference signal port, and the second reference signal port is The corresponding element when ga is 1 s It is a reference signal port, and ..., the S reference signal port is The corresponding element when is S-1 s It is a reference signal port. When is determined in ascending order of the amplitudes of K complex coefficients, the first reference signal port is The corresponding element when is S-1 s It is a reference signal port, and the second reference signal port is The corresponding element when is S-2 s It is a reference signal port, and ..., the S reference signal port is The corresponding element when ga is 0 s It is a reference signal port.

[0447] The first complex coefficient is The corresponding element when ga is 0 u s It is a complex coefficient, and the second complex coefficient is The corresponding element when ga is 1 u s It is a complex coefficient, and ..., the U complex coefficient is The corresponding element when ga is U-1 u s It is a complex coefficient. is in k complex coefficients and also the s When determined in ascending order of the amplitudes of the complex coefficients corresponding to the reference signal port, the first complex coefficient is The corresponding element when ga is U-1 u s It is a complex coefficient, and the second complex coefficient is The corresponding point when it is U-2 u s It is a complex coefficient, and ..., the U complex coefficient is The corresponding element when ga is 0 u s It is a complex coefficient.

[0448] When determining K complex coefficients from S×Z×U complex coefficients, the priority of the K complex coefficients is the identifier of each complex coefficient ( s , u s (corresponding to ) , It can be determined based on the priority of ) and S×Z×U complex coefficients.

[0449] Example 6: A preset priority rule may be related to the following three items: the quantity Z of the transport layer, the index value of the reference signal port corresponding to each complex coefficient in K complex coefficients, and the index value of each complex coefficient in K complex coefficients for the corresponding reference signal port.

[0450] As explained above, K complex coefficients can be determined from U complex coefficients corresponding to each of the S reference signal ports. In this case, a preset priority rule may be related to the following three items: the quantity Z of the transport layer, the index value of the reference signal port corresponding to each of the K complex coefficients in the S reference signal ports, and the index value of each complex coefficient among the K complex coefficients among the U complex coefficients corresponding to the corresponding reference signal port.

[0451] The pre-set priority rules are It can be represented as, , , am. is in the z-th transport layer s z The reference signal port corresponding to the u s,z Indicates the priority of complex coefficients. The smaller the value of, the more the zero in the transmission layer s z The reference signal port corresponding to the u s,z It indicates that the complex coefficient has higher priority. Is K z The number in the z-th transmission layer determined based on complex coefficients s z Indicates the index value of the reference signal port, and is, K z represents the quantity of complex coefficients in the z-th transmission layer, and am. Is K z While having complex coefficients, also in the z-th transmission layer s z The determined based on the complex coefficients corresponding to the reference signal port u s,z Indicates the index value of the complex coefficient, is. In this case, each of the K complex coefficients is ( z , s z , u s,z Can be identified as ), and the same ( z , s z , u s,z Complex coefficients identified by ) have the same priority, and different ( z , s z , u s,z It can be seen that complex coefficients identified by ) have different priorities.

[0452] The specific form of is not limited to the embodiments of this application. For details, refer to Example 4 above. Refer to the explanation. For the sake of brevity, details are not explained again here.

[0453] Specific forms are not limited to the embodiments of the present application.

[0454] for example Is u s,z It can be a monotonically increasing function related to . For example, is. In this case, the z-th transport layer's s z At the reference signal port, u s,z The smaller the value, the more the corresponding element u s,z It indicates that the complex coefficient has higher priority.

[0455] In another example, Is u s,z It can be a monotonically decreasing function related to . For example, is. In this case, the z-th transport layer's s z At the reference signal port u s,z The larger the value, the more the corresponding element u s,zIt indicates that the complex coefficient has higher priority.

[0456] In another example, K z While having complex coefficients, also in the z-th transmission layer s z In descending order of the amplitudes of the complex coefficients corresponding to the reference signal ports can be determined. In this case, the z-th transport layer's s z At the reference signal port, The smaller the value, the more the corresponding element u s,z It indicates that the complex coefficient has higher priority.

[0457] In another example, K z While having complex coefficients, also in the z-th transmission layer s z In ascending order of the amplitudes of the complex coefficients corresponding to the reference signal ports can be determined. In this case, the z-th transport layer's s z At the reference signal port, The larger the value, the more the corresponding element u s,z It indicates that the complex coefficient has higher priority.

[0458] A in the z-th transport layer s z It should be understood that, when relating to the amplitude sequence of complex coefficients corresponding to the reference signal port, the above method may further include the following: the terminal device transmits instruction information #15, where instruction information #15 is the sequence number of the complex coefficients on each reference signal port of each transport layer. u s,z and index value It indicates the mapping relationship between them. In response, the network device receives instruction information #15. Instruction information #15 and the first instruction information may be carried in the same signaling or in different signalings. This is not limited in this application.

[0459] The meaning of the priority rule described above is that the priority of the S×Z×U complex coefficients of the S reference signal ports in Z transport layers descends in the following order: the first complex coefficient corresponding to the first reference signal port in the first to Z transport layers is arranged in order, the second complex coefficient corresponding to the first reference signal port in the first to Z transport layers is arranged in order, ..., the U complex coefficient corresponding to the first reference signal port in the first to Z transport layers is arranged in order; the first complex coefficient corresponding to the second reference signal port in the first to Z transport layers is arranged in order, ..., the U complex coefficient corresponding to the second reference signal port in the first to Z transport layers is arranged in order; ...; the first complex coefficient corresponding to the S reference signal port in the first to Z transport layers is arranged in order, ..., the U complex coefficient corresponding to the S reference signal port in the first to Z transport layers is arranged in order.

[0460] The first reference signal port of the z-th transmission layer is The corresponding element when ga is 0 s z It is a reference signal port, and the second reference signal port of the z-th transmission layer is The corresponding element when ga is 1 s z It is a reference signal port, and ..., the S reference signal port of the Z-th transport layer is The corresponding element when is S-1 s z It is a reference signal port. go K z When determined in ascending order of the amplitudes of the complex coefficients, the first reference signal port of the z-th transmission layer is The corresponding element when is S-1 s z It is a reference signal port, and the second reference signal port of the z-th transmission layer is The corresponding element when is S-2 s z It is a reference signal port, and ..., the S reference signal port of the Z-th transport layer is The corresponding element when it is 0 s z It is a reference signal port.

[0461] In the transport layer, s z The first complex coefficient corresponding to the reference signal port is The corresponding element when ga is 0 u s,z It is a complex coefficient, and in the z-th transmission layer, the s z The second complex coefficient corresponding to the reference signal port is The corresponding element when ga is 1 u s,z It is a complex coefficient,..., in the z-th transmission layer, the s z The U complex coefficient corresponding to the reference signal port is The corresponding element when ga is U-1 u s,z It is a complex coefficient. In the z-th transport layer, the s z In ascending order of the amplitudes of the complex coefficients corresponding to the reference signal port When determined, in the z-th transmission layer, s z The first complex coefficient corresponding to the reference signal port is The corresponding element when ga is U-1 u s,z The second complex coefficient, which is a complex coefficient and corresponds to the sz reference signal port in the z transmission layer, is The corresponding point when it is U-2 u s,z It is a complex coefficient,..., in the z-th transport layer, the s z The U complex coefficient corresponding to the reference signal port is The corresponding element when ga is 0 u s,z It is a complex coefficient.

[0462] When determining K complex coefficients from S×Z×U complex coefficients, the priority order of the K complex coefficients is the identifier of each complex coefficient ( z , , (corresponding to ) z , s z , u s,z It can be determined based on the priority of ) and S×Z×U complex coefficients.

[0463] The pre-set priority rules are It can be represented as, , , am. is in the z-th transport layer s z The reference signal port corresponding to the u s,z Indicates the priority of complex coefficients. The smaller the value of, the more the zero in the transmission layer s z The reference signal port corresponding to the u s,z It indicates that the complex coefficient has higher priority. Is K z The number in the z-th transmission layer determined based on complex coefficients s z Indicates the index value of the reference signal port, and am. K z represents the quantity of complex coefficients in the z-th transmission layer, and am. IsK z While having complex coefficients, also in the z-th transmission layer s z The determined based on the complex coefficients corresponding to the reference signal port u s,z It is the index value of the complex coefficient, and is. In this case, each of the K complex coefficients is ( z , s z , u s,z Can be identified as ), and the same ( z , s z , u s,z Complex coefficients identified by ) have the same priority, and different ( z , s z , u s,z It can be understood that complex coefficients identified by ) have different priorities.

[0464] The specific form of is not limited to the embodiments of this application. For details, refer to Example 4 above. Refer to the explanation. For the sake of brevity, details are not explained again here.

[0465] However, in this implementation, go s z When it is a monotonically increasing function related to, at the z-th transport layer, the s z The reference signal port corresponding to the u The priority of complex coefficients is ( s z +1) The one corresponding to the reference signal port u You must understand that it has a higher priority than complex coefficients. go s z When it is a monotonically decreasing function related to, at the z-th transport layer, the s z The reference signal port corresponding to the uThe priority of complex coefficients is ( s z +1) The [Illegible] corresponding to the reference Sinpo port u It has a lower priority than complex coefficients. In the z-th transport layer, the s z The reference signal port corresponding to the u The complex coefficients are s z The index value on the reference signal port u It is a complex coefficient, and the ( s z +1) The one corresponding to the reference signal port u The complex coefficients are the ( s z +1) The index value on the reference signal port u It is a complex coefficient, and am.

[0466] go K z When the amplitudes of the complex coefficients are determined in descending order, in the z-th transmission layer, the s The reference signal port corresponding to the u The priority of complex coefficients is ( s +1) The one corresponding to the reference signal port u It has a higher priority than complex coefficients. cast K z When determining in ascending order of the amplitudes of the complex coefficients, the s The reference signal port corresponding to the u The priority of complex coefficients is ( s +1) The one corresponding to the reference signal port u It has a lower priority than complex coefficients. In the z-th transport layer, the s The reference signal port corresponding to the u The complex coefficients are s The index value on the reference signal port u It is a complex coefficient, and the s The reference signal port has an index value s It is a reference signal port, and the ( s+1) The one corresponding to the reference signal port u The complex coefficients are the ( s +1) The index value on the reference signal port u It is a complex coefficient, and the ( s +1) The reference signal port has an index value s It is a reference signal port of +1, and here am.

[0467] Specific forms are not limited to the embodiments of this application. For details, see the preceding Refer to the explanation. For the sake of brevity, details are not explained again here.

[0468] The meaning of the priority rule described above is that the priority of the S×Z×U complex coefficients of the S reference signal ports in Z transport layers descends in the following order: the first complex coefficients corresponding to the first reference signal port in the first to Z transport layers are arranged in order, the first complex coefficients corresponding to the second reference signal port in the first to Z transport layers are arranged in order, ..., the first complex coefficients corresponding to the S reference signal port in the first to Z transport layers are arranged in order; the second complex coefficients corresponding to the first reference signal port in the first to Z transport layers are arranged in order, ..., the second complex coefficients corresponding to the S reference signal port in the first to Z transport layers are arranged in order; ...; the U complex coefficients corresponding to the first reference signal port in the first to Z transport layers are arranged in order, ..., the U complex coefficients corresponding to the S reference signal port in the first to Z transport layers are arranged in order.

[0469] The first reference signal port of the z-th transmission layer is The corresponding element when ga is 0 s z It is a reference signal port, and the second reference signal port of the z-th transmission layer is The corresponding element when ga is 1 s z It is a reference signal port, and ..., the S reference signal port of the Z-th transport layer is The corresponding element when is S-1 s z It is a reference signal port. go K z When determined in ascending order of the amplitudes of the complex coefficients, the first reference signal port of the z-th transmission layer is The corresponding element when is S-1 s z It is a reference signal port, and the second reference signal port of the z-th transmission layer is The corresponding element when is S-2 s z It is a reference signal port, and ..., the S reference signal port of the Z-th transport layer is The corresponding element when ga is 0 s z It is a reference signal port.

[0470] In the transport layer, s z The first complex coefficient corresponding to the reference signal port is The corresponding element when ga is 0 u s,z It is a complex coefficient, and in the z-th transmission layer, the s z The second complex coefficient corresponding to the reference signal port is The corresponding element when ga is 1 u s,z It is a complex coefficient, ..., in the z-th transmission layer, the s z The U complex coefficient corresponding to the reference signal port is The corresponding element when ga is U-1 u s,z It is a complex coefficient. A in the z-th transport layer s z When determined in ascending order of the amplitude of the complex coefficients corresponding to the reference signal port, in the z-th transmission layer s z The first complex coefficient corresponding to the reference signal port is The corresponding element when ga is U-1 u s,z It is a complex coefficient, and in the z-th transmission layer, the s z The second complex coefficient corresponding to the reference signal port is The corresponding point when it is U-2 u s,z It is a complex coefficient, ..., in the z-th transmission layer, the s z The U complex coefficient corresponding to the reference signal port is The corresponding element when ga is 0 u s,z It is a complex coefficient.

[0471] When determining K complex coefficients from S×Z×U complex coefficients, the priority order of the K complex coefficients is the identifier of each complex coefficient ( z , , (corresponding to ) z , s z , u s,z It can be determined based on the priority of ) and S×Z×U complex coefficients.

[0472] In a third possible implementation, the number of angle-delay pairs corresponding to one reference signal port is T p When this occurs, the quantity of complex coefficients corresponding to the reference signal port, which are acquired by the terminal device, is T. p is a positive integer.

[0473] As described above, the network device can load one angle vector into one reference signal port and individually load Q angle vectors contained in X different angle-delay pairs into P reference signal ports. It can be understood that when X is less than Q, one or more delay vectors may correspond to one of the X angle vectors. Therefore, one or more angle-delay pairs may correspond to one of the P reference signal ports. Accordingly, for one reference signal port, the terminal device can obtain one or more complex coefficients corresponding to the reference signal port.

[0474] For example, in FIG. 13, the number of different angle vectors included in six angle-delay pairs is 4. When a network device loads a first angle vector to Port 1 and instructs a terminal device to two delay vectors corresponding to the first angle vector, the terminal device can obtain two complex coefficients corresponding to Port 1 through calculation, and each of the two complex coefficients corresponds to two angle-delay pairs. Similarly, when a network device loads a second angle vector to Port 2 and instructs a terminal device to one delay vector corresponding to the second angle vector, the terminal device can obtain one complex coefficient corresponding to Port 2 through calculation. When a network device loads a third angle vector to Port 2 and instructs a terminal device to one delay vector corresponding to the third angle vector, the terminal device can obtain one complex coefficient corresponding to Port 3 through calculation. When a network device loads a fourth angle vector into port 4 and instructs a terminal device to two delay vectors corresponding to the fourth angle vector, the terminal device can obtain two complex coefficients corresponding to port 4 through calculation.

[0475] In this implementation, when there are multiple transport layers, it should be understood that the terminal device can obtain one or more complex coefficients corresponding to a single reference signal port at each transport layer. Therefore, in this implementation, when the quantity of transport layers is Z and the quantity of angle-delay pairs obtained by the network device based on uplink and downlink channel mutuality is Q, the aforementioned set of complex coefficients may include Q × Z complex coefficients. Additionally, the terminal device can determine K complex coefficients from the Q × Z complex coefficients included in the set of complex coefficients.

[0476] When determining K complex coefficients from Q×Z complex coefficients, the terminal device must predetermine the value of K. The value of K may be predefined in a protocol or may be instructed to the terminal device by a network device. When the network device instructs the terminal device the value of K, the method may further include the following: the network device transmits instruction information #3, and instruction information #3 indicates the value of K. In response, the terminal device receives instruction information #3.

[0477] After the terminal device determines K complex coefficients, if the uplink resources allocated by the terminal device are sufficient to report the K complex coefficients, the terminal device can report all K complex coefficients to the network device. That is, the terminal device can generate first instruction information, the first instruction information indicates B complex coefficients, and B = K.

[0478] If the uplink resources allocated to the terminal device are insufficient to report K complex coefficients, the terminal device may determine B complex coefficients from K complex coefficients according to a preset priority rule and report B complex coefficients to the terminal device. That is, the terminal device may generate first instruction information, the first instruction information indicates B complex coefficients, and B < K.

[0479] Pre-set priority rules are not limited to the embodiments of the present application.

[0480] In one example, a preset priority rule can be associated with the index value of each complex coefficient among K complex coefficients.

[0481] Specifically, for the pre-set priority rules in this example, refer to the description of the first possible implementation. For the sake of brevity, details are not described again here.

[0482] In another example, a preset priority rule may be related to the following two items: the quantity Z of the transport layer and the index value of each complex coefficient among K complex coefficients.

[0483] Specifically, for the pre-set priority rules in this example, refer to the description of the first possible implementation. For the sake of brevity, details are not described again here.

[0484] It should be understood that the enumerated forms of expression for the preset priority rules described above are merely examples and should not constitute a limitation on this application. Based on the same concept, those skilled in the art will be able to identify many other possible forms of expression. In other words, the following preset priority rules are within the scope of protection of this application: the index value of each complex coefficient among K complex coefficients, the index value of a reference signal port corresponding to the index value of each complex coefficient among K complex coefficients among S reference signal ports, and at least one of the index values ​​of each complex coefficient among K complex coefficients among U complex coefficients corresponding to the corresponding reference signal port.

[0485] After the terminal device determines B complex coefficients from K complex coefficients according to a preset priority rule, the terminal device transmits the first instruction information to the network device.

[0486] S440: The terminal device transmits the first instruction information. In response, at S440, the network device receives the first instruction information.

[0487] The first indicator information may be, for example, channel state information (CSI), or some information elements within the CSI, for example, a bitmap within the CSI. Alternatively, the first indicator information may be other information. For example, the first indicator information is a precoding matrix indicator (PMI). This is not limited in this application. The first indicator information may be carried in one or more messages in the prior art and transmitted by a terminal device to a network device, or carried in one or more newly designed messages and transmitted by a terminal device to a network device. For example, the terminal device may transmit the first indicator information to the network device using a physical uplink resource such as a physical uplink share channel (PUSCH) or a physical uplink control channel (PUCCH), so that the network device determines a precoding matrix based on the first indicator information.

[0488] The specific method used by the terminal device to transmit the first instruction information to the network device using physical uplink resources may be the same as current technology. For brevity, a detailed description of the specific transmission process is omitted here.

[0489] S450: The network device determines B complex coefficients based on the first instruction information.

[0490] A network device can determine B complex coefficients and angle-delay pairs corresponding to B complex coefficients based on received first instruction information, and additionally, can determine a precoding matrix by referring to B complex coefficients and angle-delay pairs corresponding to B complex coefficients.

[0491] Based on the technical solution described above, when the reporting resources of the terminal device are limited, the terminal device can report the calculated complex coefficients according to the preset priority rules described above. Compared to the method of determining the priority of CSI Part 2 reporting amounts in existing technology, when the network device loads angle-delay pairs or angle vectors contained in angle-delay pairs obtained based on uplink and downlink channel mutuality into the downlink reference signal port, there is no computational redundancy when the complex coefficients are reported according to the preset priority rules, thereby reducing the complexity of the terminal device.

[0492] It should be understood that in the embodiments described above, terminal devices and / or network devices may perform some or all of the steps of the embodiments. These steps or operations are merely examples. Other operations or variations of various operations may be additionally performed in the embodiments of this application. Furthermore, the steps may be performed in a sequence different from the sequence presented in the embodiments, and not all operations of the embodiments of this application need to be performed. Also, the sequence number of the steps does not imply an execution sequence. The execution sequence of the process should be determined according to the function and internal logic of the process and should not constitute a limitation on the implementation process of the embodiments of this application.

[0493] The channel measurement method provided in the embodiments of the present application has been described in detail above with reference to FIGS. 4 through 13. The communication device provided in the embodiments of the present application has been described in detail below with reference to FIGS. 14 through 17.

[0494] FIG. 14 is a schematic block diagram of a communication device according to an embodiment of the present application. As shown in FIG. 14, the communication device (1000) may include a processing unit (1100) and a transceiver unit (1200).

[0495] Optionally, the communication device (1000) may correspond to the terminal device of the above-described method embodiment, and may be, for example, a terminal device or a component (e.g., a circuit, a chip, or a chip system) placed on the terminal device.

[0496] It should be understood that the communication device (1000) may correspond to a terminal device of the method (400) according to an embodiment of the present application. The communication device (1000) may include a unit configured to perform a method performed by the terminal device in the method (400) of FIG. 4. Additionally, the units within the communication device (1000) and other operations and / or functions described above are used individually to implement corresponding procedures of the method (400) of FIG. 4.

[0497] When the communication device (1000) is configured to perform the method (400) of FIG. 4, the processing unit (1100) may be configured to perform S430 in the method (400), and the transceiver unit (1200) may be configured to perform S420 and S440 in the method (400). It should be understood that the specific process by which the unit performs the corresponding steps described above is described in detail in the aforementioned method embodiment, and for the sake of brevity, details are not described here.

[0498] In addition, it should be understood that when the communication device (1000) is a terminal device, the transceiver unit (1200) of the communication device (1000) may be implemented using a transceiver, and may correspond, for example, to the transceiver (2020) of the communication device (2000) shown in FIG. 15 or the transceiver (3020) of the terminal device (3000) shown in FIG. 16. The processing unit (1100) of the communication device (1000) may be implemented with at least one processor, and for example, the processor may correspond to the processor (2010) of the communication device (2000) shown in FIG. 15 or the processor (3010) of the terminal device (3000) shown in FIG. 16.

[0499] Additionally, when the communication device (1000) is a chip or chip system placed in a terminal device, the transceiver unit (1200) of the communication device (1000) may be implemented as an input / output interface, circuit, etc., and the processing unit (1100) of the communication device (1000) may be implemented as a processor, microprocessor, integrated circuit, etc. integrated into the chip or chip system.

[0500] Optionally, the communication device (1000) may correspond to the network device in the above-described method embodiment, and may be, for example, a network device or a component (for example, a circuit, a chip, or a chip system) placed in the network device.

[0501] It should be understood that the communication device (1000) may correspond to the network device of the method (400) according to an embodiment of the present application, and that the communication device (1000) may include a unit configured to perform the method performed by the network device in the method (400) of FIG. 4. Additionally, the units within the communication device (1000) and the other operations and / or functions described above are used individually to implement the corresponding procedures of the method (400) of FIG. 4.

[0502] When the communication device (1000) is configured to perform the method (400) of FIG. 4, the processing unit (1100) may be configured to perform S410 and S450 in the method (400), and the transceiver unit (1200) may be configured to perform S420 and S440 in the method (400). It should be understood that the specific process by which the unit performs the corresponding steps described above is described in detail in the aforementioned method embodiment, and for the sake of brevity, details are not described here.

[0503] Additionally, it should be understood that when the communication device (1000) is a network device, the transceiver unit (1200) of the communication device (1000) may be implemented using a transceiver, for example, corresponding to the transceiver (2020) of the communication device (2000) shown in FIG. 15 or the RRU (4100) of the network device (4000) shown in FIG. 17. The processing unit (1100) of the communication device (1000) may be implemented with at least one processor, for example, the processor may correspond to the processor (2010) of the communication device (2000) shown in FIG. 15, or the processing unit (4200) or processor (4202) of the network device (4000) shown in FIG. 17.

[0504] In addition, it should be understood that when the communication device (1000) is a chip or chip system placed in a network device, the transceiver unit (1200) of the communication device (1000) may be implemented as an input / output interface, circuit, etc., and the processing unit (1100) of the communication device (1000) may be implemented as a processor, microprocessor, integrated circuit, etc. integrated into the chip or chip system.

[0505] FIG. 15 is another schematic block diagram of a communication device (2000) according to an embodiment of the present application. As shown in FIG. 15, the communication device (2000) includes a processor (2010), a transceiver (2020), and a memory (2030). The processor (2010), the transceiver (2020), and the memory (2030) communicate with each other using an internal connection path. The memory (2030) is configured to store instructions. The processor (2010) is configured to control the transceiver (2020) to transmit and / or receive a signal by executing instructions stored in the memory (2030).

[0506] It should be understood that the communication device (2000) may correspond to the terminal device of the above-described method embodiment and may be configured to perform steps and / or procedures performed by the network device or terminal device in the above-described method embodiment. Optionally, the memory (2030) may include read-only memory and random access memory and may provide instructions and data to the processor. A portion of the memory may further include non-volatile random access memory. The memory (2030) may be an independent component or may be integrated into the processor (2010). The processor (2010) may be configured to execute instructions stored in the memory (2030). Additionally, when the processor (2010) executes instructions stored in the memory, the processor (2010) is configured to perform steps and / or procedures corresponding to the network device or terminal device in the above-described method embodiment.

[0507] Optionally, the communication device (2000) is the terminal device of the above-described embodiment.

[0508] Optionally, the communication device (2000) is a network device of the above-described embodiment.

[0509] The transceiver (2020) may include a transmitter and a receiver. The transceiver (2020) may further include an antenna. There may be one or more antennas. The processor (2010), memory (2030), and transceiver (2020) may be components integrated on different chips. For example, the processor (2010) and memory (2030) may be integrated on a baseband chip, and the transceiver (2020) may be integrated on a radio frequency chip. Alternatively, the processor (2010), memory (2030), and transceiver (2020) may be components integrated on the same chip. This is not limited in the present application.

[0510] Optionally, the communication device (2000) is a component placed in the terminal device, for example, a circuit, a chip, or a chip system.

[0511] Optionally, the communication device (2000) is a component placed in the network device, for example, a circuit, a chip, or a chip system.

[0512] Alternatively, the transceiver (2020) may be a communication interface, for example, an input / output interface or circuit. The transceiver (2020), processor (2010), and memory (2030) may be integrated into the same chip. For example, they may be integrated into a baseband chip.

[0513] FIG. 16 is a schematic diagram of the structure of a terminal device (3000) according to an embodiment of the present application. The terminal device (3000) may be used in the system illustrated in FIG. 1 and performs the function of the terminal device in the method embodiment described above. As illustrated in the drawings, the terminal device (3000) includes a processor (3010) and a transceiver (3020). Optionally, the terminal device (3000) further includes a memory (3030). The processor (3010), transceiver (3020), and memory (3030) may communicate with each other using an internal connection path to transmit control signals and / or data signals. The memory (3030) is configured to store a computer program. The processor (3010) is configured to call a computer program from the memory (3030) and execute the computer program to control the transceiver (3020) to transmit and receive signals. Optionally, the terminal device (3000) may further include an antenna (3040) configured to transmit uplink data or uplink control signaling output by the transceiver (3020) using a wireless signal.

[0514] The processor (3010) and memory (3030) may be integrated into a single processing unit. The processor (3010) is configured to implement the aforementioned functions by executing program code stored in the memory (3030). In a particular implementation, the memory (3030) may otherwise be integrated into the processor (3010) or be independent of the processor (3010). The processor (3010) may correspond to the processing unit (1100) of FIG. 14 or the processor (2010) of FIG. 15.

[0515] The transceiver (3020) may correspond to the transceiver unit (1200) of FIG. 14 or the transceiver (2020) of FIG. 15. The transceiver (3020) may include a receiver (also referred to as a receiver machine or receiver circuit) and a transmitter (also referred to as a transmitter machine or transmitter circuit). The receiver is configured to receive a signal and the transmitter is configured to transmit a signal.

[0516] It should be understood that the terminal device (3000) illustrated in FIG. 16 can implement the process associated with the terminal device in the method embodiment illustrated in FIG. 4. The operation and / or function of the module of the terminal device (3000) is separately intended to implement the corresponding procedure in the aforementioned method embodiment. For details, refer to the description of the aforementioned method embodiment. To avoid repetition, detailed descriptions are appropriately omitted here.

[0517] The processor (3010) may be implemented within the terminal device and configured to perform the action described in the above-described method embodiment. The transceiver (3020) may be configured to perform a transmission action by the terminal device to the network device or a reception action from the network device in the above-described method embodiment. For details, refer to the description of the above-described method embodiment. Further details are not described here.

[0518] Optionally, the terminal device (3000) may further include a power supply (3050) configured to supply power to various components or circuits of the terminal device.

[0519] Additionally, to enhance the functionality of the terminal device, the terminal device (3000) may further include one or more input units (3060), display units (3070), audio circuits (3080), cameras (3090), sensors (3100), etc. The audio circuit may further include speakers (3082), microphones (3084), etc.

[0520] FIG. 17 is a schematic diagram of the structure of a network device according to an embodiment of the present application, which may be, for example, a schematic diagram of the structure of a base station. A base station (4000) may be used in the system illustrated in FIG. 1 and performs the function of a network device in the method embodiment described above. As illustrated in the drawings, the base station (4000) may include one or more radio frequency units (4200), such as a remote radio unit (RRU) (4100) and one or more baseband units (BBU) (also referred to as distributed units (DU)). The RRU (4100) may be referred to as a transceiver unit and may correspond to the transceiver unit (1200) of FIG. 14 or the transceiver (2020) of FIG. 15. Optionally, the RRU (4100) may be referred to as a transceiver machine, transceiver circuit, transceiver, etc., and may include at least one antenna (4101) and a radio frequency unit (4102). Optionally, the RRU (4100) may include a receiving unit and a transmitting unit. The receiving unit may correspond to a receiver (also referred to as a receiver machine or receiver circuit), and the transmitting unit may correspond to a transmitter (also referred to as a transmitter machine or transmitter circuit). The RRU (4100) is primarily configured to transmit and receive radio frequency signals and to perform conversion between radio frequency signals and baseband signals. For example, the RRU (4100) is configured to transmit instruction information to a terminal device. The BBU (4200) is primarily configured to perform baseband processing, base station control, etc. The RRU (4100) and the BBU (4200) may be physically placed together or physically separated and placed as a distributed base station.

[0521] The BBU (4200) is a control center of the base station, also called a processing unit, and may correspond to the processing unit (1100) of FIG. 14 or the processor (2010) of FIG. 15, and is configured to primarily implement baseband processing functions, such as channel coding, multiplexing, modulation, or spreading. For example, the BBU (processing unit) may be configured to control the base station to perform operation procedures related to network devices in the above-described method embodiment, and may, for example, generate the above-described instruction information.

[0522] In one example, the BBU (4200) may include one or more boards, and the multiple boards may jointly support a wireless access network having a single access standard (e.g., an LTE network) or individually support wireless access networks with different access standards (e.g., an LTE network, a 5G network, or other networks). The BBU (4200) further includes a memory (4201) and a processor (4202). The memory (4201) is configured to store necessary instructions and data. The processor (4202) is configured to control the base station to perform necessary actions, for example, to control the base station to perform operation procedures related to network devices in the method embodiment described above. The memory (4201) and the processor (4202) may serve one or more boards. In other words, the memory and the processor may be placed on each board. Alternatively, multiple boards may share the same memory and the same processor. Additionally, necessary circuits may be additionally placed on each board.

[0523] It should be understood that the base station (4000) illustrated in FIG. 17 can implement processes related to network devices in the method embodiment illustrated in FIG. 4. The operation and / or function of the modules of the base station (4000) are individually intended to implement corresponding procedures in the aforementioned method embodiment. For details, refer to the description of the aforementioned method embodiment. To avoid repetition, detailed descriptions are appropriately omitted here.

[0524] The BBU (4200) may be implemented within a network device and configured to perform the action described in the above method embodiment. The RRU (4100) may be configured to perform the action of transmitting to or receiving from a terminal device by the network device described in the above method embodiment. For details, refer to the description of the above method embodiment. Further details are not described here.

[0525] The base station (4000) illustrated in FIG. 17 is merely a possible form of network device and should not constitute a limitation to the present application. The method provided in the present application is applicable to other forms of network devices. For example, a network device may include an AAU, further include a CU and / or DU, or include a BBU and an adaptive radio unit (ARU) or a BBU; or it may be customer premises equipment (CPE) or other forms. The specific form of the network device is not limited in the present application.

[0526] The CU and / or DU may be implemented within a network device and configured to perform the actions described in the aforementioned method embodiments, and the AAU may be configured to perform the actions of transmitting to or receiving from a terminal device by the network device described in the aforementioned method embodiments. For details, refer to the description of the aforementioned method embodiments. Further details are not described here.

[0527] The present application also provides a processing device comprising at least one processor, wherein the at least one processor is configured to enable the processing device to perform a method performed by a terminal device or a network device in the method embodiment described above by executing a computer program stored in memory.

[0528] It should be understood that the processing unit may be one or more chips. For example, the processing unit may be a field programmable gate array (FPGA), application-specific integrated circuit (ASIC), system on chip (SoC), central processing unit (...

Claims

Claim 1 As a channel information feedback method, a step of generating first instruction information (S430) - the first instruction information is determined based on a received precoded reference signal, the received precoded reference signal corresponds to P reference signal ports, the first instruction information indicates B complex coefficients, the B complex coefficients are determined from K complex coefficients according to a preset priority value, the K complex coefficients are determined from a set of complex coefficients, the set of complex coefficients includes U complex coefficients determined for the s-th reference signal port of S reference signal ports in each of the Z transport layers, s = 0, 1, ..., S-1, the S reference signal ports are part or all of the P reference signal ports, and the U complex coefficients correspond to T-th reference signal port s It is part or all of the complex coefficients, and the preset priority value is as follows: an index value of each complex coefficient in the K complex coefficients, an index value of a reference signal port corresponding to each complex coefficient of the K complex coefficients in the S reference signal ports, and related to at least one of the index values ​​of each complex coefficient in the K complex coefficients among a plurality of complex coefficients allowed to be selected for the corresponding reference signal ports, and P, B, K, S, Z, and T s is a positive integer, B≤K, and U≤T s A channel information feedback method comprising the step (S440) of transmitting the first instruction information, wherein S≤P is -; and Claim 2 A channel information feedback method according to claim 1, wherein the preset priority value is additionally determined by the quantity Z of the transmission layer. Claim 3 In paragraph 2, the preset priority value Satisfying, , is, is among the S reference signal ports in the z-th transmission layer among the Z transmission layers above s z Indicates the priority of the complex coefficients corresponding to the reference signal port, and is in the above-mentioned z-th transport layer and also K z The above-mentioned, determined based on complex coefficients s z Indicates the index value of the reference signal port, Igo, K z represents the quantity of complex coefficients in the above z-th transmission layer, and In, channel information feedback method. Claim 4 In Paragraph 2, T0 = T1 = ... = T S-1 = T ≥ 2, and the above preset priority value is Satisfying, , , is, is among the S reference signal ports in the z-th transmission layer among the Z transmission layers above s z The reference signal port's u s,z Indicates the priority of complex coefficients, is in the above-mentioned z-th transport layer and also K z The above-mentioned, determined based on complex coefficients s z Indicates the index value of the reference signal port, Igo, K z represents the quantity of complex coefficients in the above z-th transmission layer, and And, is the above K z Among the complex coefficients, the above z-th transmission layer, the above s z The above, determined based on complex coefficients corresponding to the reference signal port u s,z Represents the index value of the complex coefficient, A channel information feedback method in which U is a positive integer, U ≤ T, and K ≤ S×U×Z. Claim 5 In paragraph 3, And, in the above z-th transmission layer, the above s z The priority of the complex coefficients corresponding to the reference signal port is the ( s z +1) Channel information feedback method with a higher priority than the complex coefficient corresponding to the reference signal port. Claim 6 In paragraph 4, And, in the above z-th transmission layer, the above s z The reference signal port corresponding to the u The priority of complex coefficients is ( s z +1) The one corresponding to the reference signal port u It has a higher priority than the complex coefficients, and the above s z The reference signal port corresponding to the u The complex coefficient is the above s z The index value on the reference signal port u It is a complex coefficient, and the above ( s z +1) The one corresponding to the reference signal port u The complex coefficient is the above ( s z +1) The index value on the reference signal port u It is a complex coefficient, and In, channel information feedback method. Claim 7 In paragraph 4, And, the above z-th transmission layer's above s z At the reference signal port, u s,z The smaller the value of , the more the corresponding u s,z A channel information feedback method indicating that the complex coefficient has a high priority. Claim 8 In paragraph 6, The smaller the value of , the more the above z-th transmission layer's above s z The above-mentioned reference signal port corresponding to the u s,z A channel information feedback method indicating that the complex coefficient has a high priority. Claim 9 In Paragraph 7, The smaller the value of , the more the above z-th transmission layer's above s z The above-mentioned reference signal port corresponding to the u s,z A channel information feedback method indicating that the complex coefficient has a high priority. Claim 10 As a channel information feedback method, a step of receiving first instruction information (S440) - the first instruction information is determined based on a precoded reference signal, the precoded reference signal corresponds to P reference signal ports, the first instruction information indicates B complex coefficients, the B complex coefficients are determined from K complex coefficients according to a preset priority value, the K complex coefficients are determined from a set of complex coefficients, the set of complex coefficients includes U complex coefficients determined for the s-th reference signal port of S reference signal ports in each of the Z transport layers, s = 0, 1, ..., S-1, the S reference signal ports are part or all of the P reference signal ports, and the U complex coefficients correspond to T-th reference signal port s It is part or all of the complex coefficients, and the preset priority value is as follows: an index value of each complex coefficient in the K complex coefficients, an index value of a reference signal port corresponding to each complex coefficient of the K complex coefficients in the S reference signal ports, and related to at least one of the index values ​​of each complex coefficient in the K complex coefficients among a plurality of complex coefficients allowed to be selected for the corresponding reference signal ports, and P, B, K, S, Z, and T s is a positive integer, B≤K, and U≤T s A channel information feedback method comprising the step of determining a precoding matrix based on the first instruction information, wherein S≤P is -; and Claim 11 In paragraph 10, the above-mentioned preset priority value is additionally determined by the quantity Z of the transmission layer, a channel information feedback method. Claim 12 In Clause 11, the above-mentioned preset priority value Satisfying, , is, is among the S reference signal ports in the z-th transmission layer among the Z transmission layers above s z Indicates the priority of the complex coefficients corresponding to the reference signal port, and is in the above-mentioned z-th transport layer and also K z The above-mentioned, determined based on complex coefficients s z Indicates the index value of the reference signal port, Igo, K z represents the quantity of complex coefficients in the above z-th transmission layer, and In, channel information feedback method. Claim 13 In Paragraph 11, T0 = T1 = ... = T S-1 = T ≥ 2, and the above preset priority value is Satisfying, , , is, is among the S reference signal ports in the z-th transmission layer among the Z transmission layers above s z The reference signal port's u s,z Indicates the priority of complex coefficients, is in the above-mentioned z-th transport layer and also K z The above-mentioned, determined based on complex coefficients s z Indicates the index value of the reference signal port, Igo, K z represents the quantity of complex coefficients in the above z-th transmission layer, and And, is the above K z Among the complex coefficients, the above z-th transmission layer, the above s z The above, determined based on complex coefficients corresponding to the reference signal port u s,z Represents the index value of the complex coefficient, A channel information feedback method in which U is a positive integer, U ≤ T, and K ≤ S×U×Z. Claim 14 In Paragraph 12, And, in the above z-th transmission layer, the above s z The priority of the complex coefficients corresponding to the reference signal port is the ( s z +1) Channel information feedback method with a higher priority than the complex coefficient corresponding to the reference signal port. Claim 15 In Paragraph 13, And, in the above z-th transmission layer, the above s z The reference signal port corresponding to the u The priority of complex coefficients is ( s z +1) The one corresponding to the reference signal port u It has a higher priority than the complex coefficients, and the above s z The reference signal port corresponding to the u The complex coefficient is the above s z The index value on the reference signal port u It is a complex coefficient, and the above ( s z +1) The one corresponding to the reference signal port u The complex coefficient is the above ( s z +1) The index value on the reference signal port u It is a complex coefficient, and In, channel information feedback method. Claim 16 In Paragraph 13, And, the above z-th transmission layer's above s z At the reference signal port, u s,z The smaller the value of , the more the corresponding u s,z A channel information feedback method indicating that the complex coefficient has a high priority. Claim 17 In Paragraph 13, The smaller the value of , the more the above z-th transmission layer's above s z The above-mentioned reference signal port corresponding to the u s,z A channel information feedback method indicating that the complex coefficient has a high priority. Claim 18 In Paragraph 16, The smaller the value of , the more the above z-th transmission layer's above s z The above-mentioned reference signal port corresponding to the u s,z A channel information feedback method indicating that the complex coefficient has a high priority. Claim 19 A communication device (1000) for generating first instruction information, wherein the first instruction information is determined based on a received precoded reference signal, the received precoded reference signal corresponds to P reference signal ports, the first instruction information indicates B complex coefficients, the B complex coefficients are determined from K complex coefficients according to a preset priority value, the K complex coefficients are determined from a set of complex coefficients, the set of complex coefficients includes U complex coefficients determined for the s-th reference signal port of S reference signal ports in each of Z transmission layers, s = 0, 1, ..., S-1, the S reference signal ports are part or all of the P reference signal ports, and the U complex coefficients correspond to T-th reference signal port s It is part or all of the complex coefficients, and the preset priority value is as follows: an index value of each complex coefficient in the K complex coefficients, an index value of a reference signal port corresponding to each complex coefficient of the K complex coefficients in the S reference signal ports, and related to at least one of the index values ​​of each complex coefficient in the K complex coefficients among a plurality of complex coefficients allowed to be selected for the corresponding reference signal ports, and P, B, K, S, Z, and T s is a positive integer, B≤K, and U≤T s A communication device (1000) comprising a processing unit (1100) configured such that S≤P; and a transceiver unit (1200) configured to transmit the first instruction information. Claim 20 In paragraph 19, the above preset priority value is additionally determined by the quantity Z of the transmission layer, in a communication device (1000). Claim 21 In Clause 20, the above-mentioned preset priority value Satisfying, , is, is among the S reference signal ports in the z-th transmission layer among the Z transmission layers above s z Indicates the priority of the complex coefficients corresponding to the reference signal port, and is in the above-mentioned z-th transport layer and also K z The above-mentioned, determined based on complex coefficients s z Indicates the index value of the reference signal port, Igo, K z represents the quantity of complex coefficients in the above z-th transmission layer, and Person, communication device (1000). Claim 22 In Paragraph 20, T0 = T1 = ... = T S-1 = T ≥ 2, and the above preset priority value is Satisfying, , , is, is among the S reference signal ports in the z-th transmission layer among the Z transmission layers above s z The reference signal port's u s,z Indicates the priority of complex coefficients, is in the above-mentioned z-th transport layer and also K z The above-mentioned, determined based on complex coefficients s z Indicates the index value of the reference signal port, Igo, K z represents the quantity of complex coefficients in the above z-th transmission layer, and And, is the above K z Among the complex coefficients, the above z-th transmission layer, the above s z The above, determined based on complex coefficients corresponding to the reference signal port u s,z Represents the index value of the complex coefficient, A communication device (1000) in which U is a positive integer, U ≤ T, and K ≤ S×U×Z. Claim 23 In paragraph 21, And, in the above z-th transmission layer, the above s z The priority of the complex coefficients corresponding to the reference signal port is the ( s z +1) A communication device (1000) that has a higher priority than the complex coefficient corresponding to the reference signal port. Claim 24 In Paragraph 22, And, in the above z-th transmission layer, the above s z The reference signal port corresponding to the u The priority of complex coefficients is ( s z +1) The one corresponding to the reference signal port u It has a higher priority than the complex coefficients, and the above s z The reference signal port corresponding to the u The complex coefficient is the above s z The index value on the reference signal port u It is a complex coefficient, and the above ( s z +1) The one corresponding to the reference signal port u The complex coefficient is the above ( s z +1) The index value on the reference signal port u It is a complex coefficient, and Person, communication device (1000). Claim 25 In Paragraph 22, And, the above z-th transmission layer's above s z At the reference signal port, u s,z The smaller the value of , the more the corresponding u s,z A communication device (1000) indicating that the priority of the complex coefficient is high. Claim 26 In paragraph 24 or 25, The smaller the value of , the more the above z-th transmission layer's above s z The above-mentioned reference signal port corresponding to the u s,z A communication device (1000) indicating that the priority of the complex coefficient is high. Claim 27 A communication device (1000) receives first instruction information, wherein the first instruction information is determined based on a precoded reference signal, the precoded reference signal corresponds to P reference signal ports, the first instruction information indicates B complex coefficients, the B complex coefficients are determined from K complex coefficients according to a preset priority value, the K complex coefficients are determined from a set of complex coefficients, the set of complex coefficients includes U complex coefficients determined for the s-th reference signal port of S reference signal ports in each of Z transmission layers, s = 0, 1, ..., S-1, the S reference signal ports are part or all of the P reference signal ports, and the U complex coefficients correspond to T-th reference signal port s It is part or all of the complex coefficients, and the preset priority value is as follows: an index value of each complex coefficient in the K complex coefficients, an index value of a reference signal port corresponding to each complex coefficient of the K complex coefficients in the S reference signal ports, and related to at least one of the index values ​​of each complex coefficient in the K complex coefficients among a plurality of complex coefficients allowed to be selected for the corresponding reference signal ports, and P, B, K, S, Z, and T s is a positive integer, B≤K, and U≤T s A communication device (1000) comprising: a transceiver unit (1200) configured such that S≤P; and a processing unit (1100) configured to determine a precoding matrix based on the first instruction information. Claim 28 In paragraph 27, the above preset priority value is additionally determined by the quantity Z of the transmission layer, in a communication device (1000). Claim 29 In Clause 28, the above-mentioned preset priority value Satisfying, , is, is among the S reference signal ports in the z-th transmission layer among the Z transmission layers above s z Indicates the priority of the complex coefficients corresponding to the reference signal port, and is in the above-mentioned z-th transport layer and also K z The above-mentioned, determined based on complex coefficients s z Indicates the index value of the reference signal port, Igo, K z represents the quantity of complex coefficients in the above z-th transmission layer, and Person, communication device (1000). Claim 30 In Paragraph 28, T0 = T1 = ... = T S-1 = T ≥ 2, and the above preset priority value is Satisfying, , , is, is among the S reference signal ports in the z-th transmission layer among the Z transmission layers above s z The reference signal port's u s,z Indicates the priority of complex coefficients, is in the above-mentioned z-th transport layer and also K z The above-mentioned, determined based on complex coefficients s z Indicates the index value of the reference signal port, Igo, K z represents the quantity of complex coefficients in the above z-th transmission layer, and And, is the above K z Among the complex coefficients, the above z-th transmission layer, the above s z The above, determined based on complex coefficients corresponding to the reference signal port u s,z Represents the index value of the complex coefficient, A communication device (1000) in which U is a positive integer, U ≤ T, and K ≤ S×U×Z. Claim 31 In Paragraph 29, And, in the above z-th transmission layer, the above s z The priority of the complex coefficients corresponding to the reference signal port is the ( s z +1) A communication device (1000) that has a higher priority than the complex coefficient corresponding to the reference signal port. Claim 32 In Paragraph 30, And, in the above z-th transmission layer, the above s z The reference signal port corresponding to the u The priority of complex coefficients is ( s z +1) The one corresponding to the reference signal port u It has a higher priority than the complex coefficients, and the above s z The reference signal port corresponding to the u The complex coefficient is the above s z The index value on the reference signal port u It is a complex coefficient, and the above ( s z +1) The one corresponding to the reference signal port u The complex coefficient is the above ( s z +1) The index value on the reference signal port u It is a complex coefficient, and Person, communication device (1000). Claim 33 In Paragraph 30, And, the above z-th transmission layer's above s z At the reference signal port, u s,z The smaller the value of , the more the corresponding u s,z A communication device (1000) indicating that the priority of the complex coefficient is high. Claim 34 In Article 32 or Article 33, The smaller the value of , the more the above z-th transmission layer's above s z The above-mentioned reference signal port corresponding to the u s,z A communication device (1000) indicating that the priority of the complex coefficient is high. Claim 35 A communication device comprising at least one processor, wherein the at least one processor is configured to enable the communication device to implement a method according to any one of claims 1 to 18 by executing a computer program stored in memory. Claim 36 A communication device comprising: a communication interface configured to input and / or output information; and a processor configured to enable the communication device to execute a computer program to implement a method according to any one of claims 1 through 18. Claim 37 A communication device comprising: a memory configured to store a computer program; and a processor configured to enable the communication device to call the computer program from the memory and execute the computer program to implement a method according to any one of claims 1 to 18. Claim 38 A computer-readable storage medium comprising a computer program, wherein when the computer program is executed on a computer, the computer is enabled to perform a method according to any one of claims 1 to 18. Claim 39 A computer program product, which is a computer program stored on a computer-readable storage medium, wherein when the computer program is executed on a computer, the computer is enabled to perform a method according to any one of claims 1 to 18. Claim 40 A communication system comprising: at least one first communication device claimed in any one of claims 1 to 9; and at least one second communication device claimed in any one of claims 10 to 18. 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