WO2018171604A1

WO2018171604A1 - Information transmission method and apparatus

Info

Publication number: WO2018171604A1
Application number: PCT/CN2018/079721
Authority: WO
Inventors: 黄逸; 任海豹; 李元杰
Original assignee: 华为技术有限公司
Priority date: 2017-03-24
Filing date: 2018-03-21
Publication date: 2018-09-27
Also published as: CN108631837A; CN108631837B

Abstract

The present application provides an information transmission method and apparatus. The method comprises: a terminal acquires, on the basis of reference signals transmitted through multiple antenna port groups by an access network apparatus, a target precoding matrix; the terminal determining target indication information corresponding to the target precoding matrix according to a codebook, wherein the codebook includes a correspondence relationship between a precoding matrix and indication information, the precoding matrix is a product of a first matrix and a second matrix, the first matrix is for selecting a first antenna port group from the multiple antenna port groups or for representing a difference parameter among the multiple antenna port groups, and the second matrix includes a sub precoding matrix corresponding to a part or all of the multiple antenna port groups; and the terminal transmitting the target indication information to the access network apparatus. The method is capable of correcting directivity of multiple beams, preventing the occurrence of excessive side lobes, enhancing beamforming gain, and further increasing the capacity of antennas.

Description

Information transmission method and device

The present application claims the priority of the Chinese Patent Application, filed on March 24, 2017, the entire disclosure of which is hereby incorporated by reference.

Technical field

The present application relates to communication technologies, and in particular, to a method and device for transmitting information.

Background technique

Massive Multiple Input Multiple Output (Massive MIMO) technology is one of the key technologies of New Radio Access Technology (NR), which can increase system capacity by using more space degrees of freedom. Therefore, it has been extensively studied. In a large-scale MIMO system, in order to improve system transmission performance by performing precoding on the transmitting end, the transmitting end needs to know channel state information (CSI), and the CSI is usually obtained by the receiving end for channel measurement and reported to the system. The sender. In the prior art, the CSI reported by the receiving end to the transmitting end mainly includes a Channel Quality Indicator (CQI), a Precoding Matrix Index (PMI), and a Rank Indication (RI). The transmitting end may determine the precoding matrix according to the PMI, and perform precoding processing on the data to improve system transmission performance.

Multi-panel dual-polarized array antennas are introduced in large-scale MIMO technology. As a whole, the array spacing of the antenna structure is not uniform, and the existing precoding matrix is designed for uniform matrix structure, and is not suitable for multiple The dual-polarized array antenna of the panel continues to be used, which may cause beam shape changes, which may cause problems such as beam accuracy degradation and system performance loss.

Summary of the invention

In view of this, the present application provides a method and a device for transmitting information, in order to solve the technical problem that the precoding matrix in the prior art cannot be applied to a multi-panel dual-polarized array antenna, and if the prior art is pre- The coding matrix is used for multi-panel dual-polarized array antennas, and the resulting beam shape change leads to technical problems of beam accuracy degradation and system performance loss.

In a first aspect, the application provides a method for transmitting information, including:

Step 1: The terminal obtains a target precoding matrix based on a reference signal sent by the access network device through multiple antenna port groups;

Step 2: The terminal determines target indication information corresponding to the target precoding matrix according to the codebook, where the codebook includes a correspondence between a precoding matrix and the indication information, where the precoding matrix is a product of the first matrix and the second matrix, and a first matrix for selecting a first antenna port group from the plurality of antenna port groups or for characterizing a difference parameter between the plurality of antenna port groups, the second matrix comprising a portion of the plurality of antenna port groups or a sub-precoding matrix corresponding to all antenna port groups;

Step 3: The terminal sends the foregoing target indication information to the access network device.

In a possible design, before step 1 above, the method further includes:

The terminal receives the first configuration information from the access network device, where the first configuration information is used to indicate the codebook used by the terminal.

In a possible design, before step 1 above, the method further includes:

The terminal receives second configuration information from the access network device, where the second configuration information is used to configure parameters of the codebook.

In one possible design, the second configuration information includes at least one of the number of antenna port groups and the number of antenna ports in the antenna port group.

In a possible design, the foregoing target indication information includes a first precoding matrix indicating PMI and a second PMI, where the first PMI is used to indicate the first matrix, and the second PMI is used to indicate the second matrix.

In a second aspect, the present application provides a method for transmitting information, where the method is used for an access network device, and the access network device sends information through multiple antenna port groups, and the method includes:

Step 1: The access network device receives channel state information reported by the terminal, and the channel state information includes target indication information.

Step 2: The access network device determines, according to the codebook, a target precoding matrix corresponding to the target indication information, where the codebook includes a correspondence between the indication information and the precoding matrix, where the precoding matrix is a product of the first matrix and the second matrix. The first matrix is configured to select a first antenna port group from the plurality of antenna port groups or to characterize a difference parameter between the plurality of antenna port groups, and the second matrix includes part or all of the antennas of the plurality of antenna port groups The sub-precoding matrix corresponding to the port group.

In one possible design, the method further includes:

The access network device sends the first configuration information to the terminal, where the first configuration information is used to configure the terminal to use the foregoing codebook.

In a possible design, prior to step 1 of the second aspect, the method further comprises:

The access network device sends second configuration information to the terminal, where the second configuration information is used to configure parameters of the foregoing codebook.

In one possible design, the second configuration information includes the number of antenna port groups and/or the number of antenna ports in the antenna port group.

In a possible design, the foregoing target indication information includes a first precoding matrix indicating PMI and a second PMI, the first PMI is used to indicate the first matrix, and the second PMI is used to indicate the second matrix.

With reference to the first aspect or the second aspect, in a possible design, the second matrix includes a sub-precoding matrix corresponding to the S antenna port groups of the multiple antenna port groups, and the first matrix is used to represent the multiple a phase difference between the wireless channels corresponding to the antenna port group; further, the first matrix is

The second matrix is

The target precoding matrix is W, and

Among them, in the formula

Indicates the length is

a matrix, k is equal to any value of j ₁ , j ₂ ... j _N , S is less than or equal to N, N is the number of antenna port groups of the access network device, and M is the antenna port in the antenna port group Quantity,

The phase difference between the two polarization directions of the antenna port group,

Equal to any value in {+1, -1, +j, -j},

The phase difference between the radio channels corresponding to the S antenna port groups, l=1, . . . , X-1, X is equal to the number of quantization bits of θ, and is determined by the first PMI, j ₁ , j ₂ ... j _N is determined by the second PMI described above.

In a possible design, the second matrix includes a sub-precoding matrix corresponding to each of the plurality of antenna port groups of the access network device, and the first matrix is configured to select from the multiple antenna port groups. a first antenna port group; specifically, the first matrix is

The second matrix is

The target precoding matrix is W, and

among them,

Indicates the length is

The matrix, k is equal to any value of j ₁ , j ₂ ... j _N , one element in the first matrix is 1, and the other elements are 0, N is the antenna port group on the access network device Number, M is the number of antenna ports in each antenna port group,

For the phase difference between two polarized antennas on the access network device,

Equal to any of {+1, -1, +j, -j}, {a ₁ , a ₂ ... a _N } is determined by the first PMI described above, j ₁ , j ₂ ... j _N The above second PMI is determined.

The second matrix is

Target precoding matrix

among them,

Indicates the length is

a matrix, k is equal to any of j ₁ , j ₂ ... j _N ; I _M represents an identity matrix of length M × M; an element in {a ₁ , a ₂ ... a _N } is 1, other elements are 0, N is the total number of antenna port groups on the access network device, and M is the number of antenna ports in each antenna port group.

The phase difference between two polarized antennas on the access network device,

Is equal to any one of {+1, -1, +j, -j}, the {a ₁ , a ₂ ... a _N } is determined according to a first PMI, the j ₁ , j ₂ ... j _{N is} determined according to the second PMI.

The second matrix is

The target precoding matrix is

among them,

Indicates the length is

The matrix, k is equal to j ₁ ; I _M represents an identity matrix of length M × M; one element in {a ₁ , a ₂ ... a _N } is 1, the other elements are 0, and N is the access network The total number of antenna port groups on the device, where M is the number of antenna ports in each antenna port group.

Equal to any of {+1, -1, +j, -j}, {a ₁ , a ₂ ... a _N } is determined according to the first PMI, and j _{1 is} determined according to the second PMI.

In a possible design, the second matrix includes a sub-precoding matrix corresponding to the S antenna port groups of the plurality of antenna port groups, and the first matrix is used to represent between the wireless channels corresponding to the multiple antenna port groups. Phase difference; specifically, the first matrix is

The second matrix is

Target precoding matrix

among them,

Indicates the length is

a matrix, k is equal to any value of j ₁ , j ₂ ... j _N , S is less than or equal to N, N is the number of antenna port packets on the access network device, and M is each antenna port group The number of antenna ports in the

Equal to any value in {+1, -1, +j, -j},

For the phase difference between the corresponding radio channels of each antenna port group in the S antenna port groups, l=1,...,X-1,X is the value in the set {2,4,8,...}, X is equal to θ The number of quantization bits, l is determined according to the first PMI, and j ₁ , j ₂ ... j _{N are} determined according to the second PMI.

The second matrix is

Target precoding matrix

among them,

Indicates the length is

The matrix, k is equal to j ₁ , S is less than or equal to N, N is the number of antenna port groups on the access network device, and M is the number of antenna ports in each antenna port group,

Equal to any value in {+1, -1, +j, -j},

For the phase difference between the corresponding radio channels of each antenna port group in the S antenna port groups, l=1,...,X-1,X is the value in the set {2,4,8,...}, X is equal to θ The number of quantization bits, l is determined according to the first PMI, and j _{1 is} determined according to the second PMI.

In a possible design, the target indication information further includes: a third PMI with a value of 0 corresponding to the target precoding matrix, and the target precoding matrix includes a product of the first matrix and the second matrix, specifically:

The target precoding matrix is equal to the product of the first matrix, the second matrix, and the third matrix; wherein, the third matrix is a unit matrix, and the number of rows and the number of columns of the unit matrix are equal to the antenna port of the access network device. total.

In a possible design, the first PMI includes a modulation symbol that is reported on the uplink shared channel PUSCH, and the modulation symbol is a symbol that is quantized and modulated by θ in the first matrix.

In a third aspect, the application provides a terminal, comprising: a unit or means for performing the steps of the above first aspect.

In a fourth aspect, the application provides an access network device, including: a unit or means for performing the steps of the second aspect above.

In a fifth aspect, the present application provides a terminal comprising at least one processing element for storing a program and data, and at least one storage element for performing the first aspect of the present application The method provided.

In a sixth aspect, the present application provides an access network device including at least one processing element for storing programs and data, and at least one processing element for performing the present application The second aspect provides a method.

In a seventh aspect, the application provides a terminal comprising at least one processing element (or chip) for performing the method of the above first aspect.

In an eighth aspect, the application provides an access network device comprising at least one processing element (or chip) for performing the method of the above second aspect.

In a ninth aspect, the present application provides a processing program for information that, when executed by a processor, is used to perform the method of the above first aspect.

In a tenth aspect, the present application provides a processing program for information that, when executed by a processor, is used to perform the method of the second aspect above.

In an eleventh aspect, the present application provides a program product, such as a computer readable storage medium, comprising the program of the ninth aspect.

In a twelfth aspect, the present application provides a program product, such as a computer readable storage medium, including the program of the tenth aspect.

It can be seen that in the above various aspects and possible designs, the target precoding matrix W considers the difference parameter between the antenna port groups, or the target precoding matrix W may be a precoding matrix for a first antenna port group. Therefore, even if there are multiple antenna panels in the access network device, and the spacing of the plurality of antenna panel arrays is not uniform, the present application can correct the directivity of multiple beams by using both methods, thereby avoiding excessive side lobes. The beamforming gain is increased, which in turn increases the capacity of the antenna.

DRAWINGS

FIG. 1 is a network architecture diagram provided by an embodiment of the present application;

1a is a schematic structural diagram of a multi-panel dual-polarized array antenna according to an embodiment of the present application;

FIG. 2 is a signaling flowchart of Embodiment 1 of a method for transmitting information provided by the present application

2a is a signaling flowchart of an embodiment of a method for transmitting information according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of an embodiment of a terminal according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of another embodiment of a terminal according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of another embodiment of a terminal according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of another embodiment of a terminal according to an embodiment of the present disclosure;

FIG. 6B is a schematic structural diagram of another embodiment of a terminal according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of an embodiment of an access network device according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of another embodiment of an access network device according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of another embodiment of an access network device according to an embodiment of the present disclosure;

FIG. 10A is a schematic structural diagram of another embodiment of an access network device according to an embodiment of the present disclosure;

FIG. 10B is a schematic structural diagram of another embodiment of an access network device according to an embodiment of the present disclosure.

detailed description

The method and device for transmitting information provided by the present application can be applied to the system architecture shown in FIG. 1. As shown in FIG. 1, the system includes: an access network device and at least one terminal, and the access network device sends data to the terminal through an antenna. With the introduction of massive MIMO technology, the structure of the antenna has evolved into a multi-panel dual-polarized array antenna. Please refer to FIG. 1 a , which is a schematic structural diagram of a multi-panel dual-polarized array antenna according to an embodiment of the present application. As shown in FIG. 1a, the antenna includes a plurality of antenna panels. Each square on the left side of the figure represents an antenna panel, and each of the intersecting lines on the right side represents an antenna array, and each oblique line in the cross line represents a polarization direction. . In the figure, d _{g, H} and d _{g, V} represent the distance between the antenna panels in the horizontal and vertical directions _, respectively, where d _{g, H} and d _{g, V} may be the same or different. And the number of antenna elements is not limited.

In order to better understand the technical solutions of the present application, the network elements involved in FIG. 1 and other terms involved in the embodiments of the present application are explained below:

1) A terminal, also called a User Equipment (UE), is a device that provides voice and/or data connectivity to a user, for example, a handheld device with a wireless connection function, an in-vehicle device, and the like. Currently, some examples of terminals are: mobile phones, tablets, laptops, PDAs, mobile Internet devices (MIDs), wearable devices, such as smart watches, smart bracelets, pedometers, and the like.

2) The Radio Access Network (RAN) is the part of the network that connects the terminal to the wireless network. A RAN node or a RAN device or an access network device is a node or device in a radio access network, and may also be referred to as a base station. Currently, some examples of RAN nodes are: gNB, Transmission Reception Point (TRP), evolved Node B (eNB), Radio Network Controller (RNC), and Node B (Node). B, NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (for example, Home evolved NodeB, or Home Node B, HNB), Baseband Unit (BaseBand Unit, BBU), or Wifi Access Point (AP), etc. In addition, in a network structure, the RAN may include a Centralized Unit (CU) node and a Distributed Unit (DU) node. This structure separates the protocol layers of the eNB in Long Term Evolution (LTE). The functions of some protocol layers are centrally controlled in the CU. The functions of some or all of the remaining protocol layers are distributed in the DUs. Centrally control each DU.

3) "Multiple" means two or more, and other quantifiers are similar. "and/or", describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately. The character "/" generally indicates that the contextual object is an "or" relationship.

For the multi-panel antenna structure shown in FIG. 1a, although the distance between the antenna elements in the panel is equal, the distance between the panel and the panel may not be equal to the distance between the antenna arrays, so as a whole, The distance between the antenna elements of the antenna is no longer uniform. The design of the existing precoding matrix is designed for a uniform antenna array. The antenna arrays in the uniform antenna array are evenly distributed, that is, the distance between the antenna elements is equal. Therefore, the design using a conventional precoding matrix changes the beam shape without the required beam, resulting in reduced beam accuracy and system performance loss.

The method and device for transmitting information provided by the embodiments of the present application, when the antenna array spacing is not uniform, for example, a multi-panel antenna, divides the entire antenna into multiple antenna port groups, and designs a matrix to reflect the difference between the antenna port groups. Then, the precoding matrix is characterized by the matrix and the sub-precoding matrix of the antenna port groups, thereby solving the problem of beam precision degradation caused by the linear precoding matrix. Or designing a matrix to select an antenna port group, so that the precoding matrix is only for one antenna port group, which reduces the problem of beam precision degradation caused by the difference between the antenna port groups. Therefore, the precoding matrix provided by the embodiment of the present application can correct the directivity of multiple beams corresponding to the antenna panel, avoid excessive side lobes, thereby improving beamforming gain, and thereby increasing the antenna. Capacity.

Regarding the manner of antenna grouping, the antenna ports on one panel may be divided into one group, or the antenna ports in the same polarization direction on each panel may be divided into one group.

The technical solutions of the present application and the technical solutions of the present application are described in detail in the following specific embodiments to solve the above technical problems. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.

FIG. 2 is a signaling flowchart of Embodiment 1 of a method for transmitting information provided by the present application. In this embodiment, the terminal sends the target indication information corresponding to the target precoding matrix W to the access network device based on the reference signal sent by the access network device through the multiple antenna port groups, so that the access network device according to the target indication The information determines the specific process of the target precoding matrix W. As shown in FIG. 2, the method includes the following steps:

S101: The access network device sends information to the terminal by using multiple antenna port groups.

Optionally, the information may be a downlink reference signal.

S102: The terminal obtains a target precoding matrix based on a reference signal sent by the access network device through multiple antenna port groups.

Specifically, in this embodiment, the access network device has multiple antenna port groups, and each antenna port group includes one or more ports. Optionally, the access network device may have multiple antenna panels, and the spacing between the multiple antenna panels may be equal or not equal, which is not limited in this embodiment. Optionally, in this application, the antenna port may be a beamformed CSI-RS antenna port for transmitting a beamformed CSI-RS signal, and a beamformed CSI-RS antenna port may correspond to one beam, and each antenna panel may change a beam right. The values form a plurality of beams directed in multiple directions, the plurality of beams corresponding to a plurality of different beamformed CSI-RS antenna ports.

When the access network device needs to perform precoding on the downlink data, optionally, the access network device sends the downlink reference signal to the terminal through multiple antenna port groups. After receiving the reference signal sent by the access network device through the multiple antenna port groups, the terminal device performs channel estimation based on the reference signals to obtain a measurement result H, where the H is a channel matrix. Then, the terminal may perform SVD decomposition on the H to obtain a feature vector (ie, a unitary matrix V), and then compare the feature vector with each precoding matrix in the codebook, and select a precoding matrix closest to the feature vector as a target. Precoding matrix.

S103: The terminal determines target indication information corresponding to the target precoding matrix according to the codebook, where the codebook includes a correspondence between a precoding matrix and the indication information, where the precoding matrix is a product of the first matrix and the second matrix. The first matrix is configured to select a first antenna port group from the plurality of antenna port groups or to characterize a difference parameter between the multiple antenna port groups, where the second matrix includes the multiple a sub-precoding matrix corresponding to some or all of the antenna port groups of the antenna port group;

S104: The terminal sends the target indication information to the access network device.

Specifically, after the terminal device obtains the target precoding matrix, the target indication information corresponding to the target precoding matrix may be determined according to the preset codebook of the terminal device side, where the target indication information may be the codebook corresponding to the target precoding matrix. Index, or PMI.

It should be noted that the preset codebook on the terminal device side is the new codebook provided by the application. Optionally, the new codebook may be embodied in the form of a correspondence between the codebook index and the precoding matrix, and may also be embodied in the form of a table. The new codebook includes a plurality of precoding matrices, and each precoding matrix corresponds to one indication information. Each precoding matrix in the codebook may include a product of both the first matrix and the second matrix. Alternatively, "each precoding matrix may include a product of both the first matrix and the second matrix". It may be that each precoding matrix is equal to the product of the first matrix and the second matrix, and may also be a product between the first matrix, the second matrix and other matrices or other parameters, where the "product" may be the first matrix and The product of the second matrix may also be the Kronecker product of the first matrix and the second matrix. In summary, one precoding matrix in the new codebook provided by the present application may be split into the first matrix. And the second matrix, or split into more matrices.

The first matrix is configured to select a first antenna port group from a plurality of antenna port groups of the access network device or to identify a difference parameter between the plurality of antenna port groups of the access network device, where the second matrix includes a sub-precoding matrix w corresponding to a part or all of the antenna port groups of the plurality of antenna port groups of the network device, wherein the sub-precoding matrix w corresponding to one antenna port group in the second matrix is the antenna port group class B codebook The sub-precoding matrix w corresponding to it. For example, if the number of antenna ports in the antenna port group is 4, the sub-precoding matrix w corresponding to the antenna port group is a precoding matrix in the codebook of the 4-antenna port in the codebook of classB.

Optionally, the difference parameter between the multiple antenna port groups may be a phase difference between respective wireless channels of the multiple antenna port groups, where the phase difference refers to a phase between frequency domain impulse responses of the wireless channel. Poorly; optionally, the difference parameter may also be a parameter capable of characterizing other differences between the plurality of antenna port groups, such as amplitude differences and the like. When the first matrix is used to select the first antenna port group from the plurality of antenna port groups of the access network device, that is, the target precoding matrix W determined by the terminal device actually only corresponds to the first antenna port group, which is reduced. The problem of the beam accuracy degradation caused by the difference between the antenna port groups, so that the access network device uses the target precoding matrix W for a first antenna port group for downlink data processing, and the beam directivity is clear Does not produce excessive beam side lobes.

S105: The access network device receives channel state information reported by the terminal, where the channel state information includes target indication information.

S106: The access network device determines, according to the codebook, a target precoding matrix W corresponding to the target indication information.

Specifically, for the access network device and the terminal, both store the new codebook provided by the present application. Therefore, based on the new codebook, after the access network device receives the channel state information sent by the terminal, determining the target precoding matrix W from the new codebook based on the target indication information in the channel state information, and further utilizing the The target precoding matrix W precodes the downlink data to improve the performance of the system.

It can be seen from the above description that the target precoding matrix W considers the difference parameter between the antenna port groups, or the target precoding matrix W can be a precoding matrix for one first antenna port group, and therefore, even the access network device When there are multiple antenna panels, and the spacing of the multiple antenna panel arrays is not uniform, the present application can correct the directivity of multiple beams by using both methods, avoiding excessive side lobes, and improving the beam shaping gain. Increased the capacity of the antenna.

Based on the above embodiments, further, refer to the signaling flowchart of the embodiment of the method for transmitting information shown in FIG. 2a. As shown in FIG. 2a, before the above S101, the method includes:

S201: The access network device sends the first configuration information to the terminal, where the first configuration information is used to configure the terminal to use the codebook.

S202: The terminal receives the first configuration information from the access network device.

Specifically, the access network device may send the first configuration information to the terminal after the reference signal is sent by using the multiple antenna port groups, where the first configuration information is used to configure the terminal to use the codebook, that is, the terminal is notified Which codebook is used to determine the target precoding matrix. Optionally, in this embodiment, the same number of antenna ports corresponds to multiple sets of new codebooks (that is, the codebook provided by the present application), and the access network device may determine the number of antenna ports based on the number of antenna ports on which the reference signal is transmitted. The codebook then informs the terminal of the selected codebook in advance through the first configuration information, so that the terminal device can combine the decomposition result (ie, the matrix V) after obtaining the channel measurement result H and performing SVD decomposition on the terminal device. The precoding matrix with the highest correlation with the unitary matrix may be directly searched from the codebook indicated by the first configuration information as the target precoding matrix W, thereby combining the target precoding matrix W and the codebook to determine the target precoding matrix. W corresponds to the target indication information in the codebook. Therefore, the embodiment avoids that the access network device searches for the target precoding matrix W from all the new codebooks based on the target indication information, but specifically determines the target preamble directly from the codebook indicated by the first configuration information. The coding matrix W improves the search efficiency of the target pre-compiled matrix.

Optionally, before the foregoing S101, the embodiment may further include the steps of S203 and S204. Alternatively, the S203 and S204 may be performed after S202, and may also be performed in parallel with S201 and S202.

S203: The access network device sends second configuration information to the terminal, where the second configuration information is used to configure parameters of the codebook.

Optionally, the second configuration information includes the number of antenna port groups and/or the number of antenna ports in the antenna port group.

S204: The terminal receives the second configuration information from the access network device.

Specifically, before the foregoing S101, the access network device sends the second configuration information to the terminal device, where the second configuration information is used to configure the parameters of the codebook, for example, the number of antenna ports corresponding to the configuration codebook. Optionally, the second configuration information may include the number of antenna port groups and/or the number of antenna ports in the antenna port group.

Optionally, the content included in the second configuration information may be different in different scenarios. The following describes the two scenarios:

In the first scenario, multiple beams formed by multiple antenna panels of the access network device (ie, beamformed CSI-RS antenna ports) may be combined, and the resources occupied by the multiple components constitute one CSI-RS resource. Assume that the number of antenna panels of the access network device is N, that is, the number of antenna port groups on the access network device is N, and the number of antenna ports in each antenna port group is equal to M, then the access network device has M*N antennas. A port (number sum), which may correspond to a precoding matrix of length M*N in the codebook provided by the present application, and therefore needs to perform feedback of indication information based on a codebook of length MN.

The second scenario: multiple beams formed by one antenna panel on the access network device (ie, beamformed CSI-RS antenna ports) can be combined, and the resources occupied by the access network form a CSI-RS resource. Assume that the number of antenna panels is N, that is, the number of antenna port groups on the access network device is N, and the number of beamformed CSI-RS antenna ports in each antenna port group is equal to M. Therefore, there are a total of N CSI-RS resources. The CSI-RS signals transmitted by the antenna ports corresponding to the N CSI-RS resources may be combined to perform CSI measurement, corresponding to a precoding matrix of length M*N, and a codebook of length M*N is used for PMI. Feedback.

Based on the foregoing first scenario, the second configuration information includes a total number of antenna port groups (N) on the access network device and a number of antenna ports in each antenna port group. In combination with the description of the first scenario, the access network device may determine, according to the total number of antenna ports on the access network device, the codebook that is required to be used by the access network device, and then notify the terminal by using the first configuration information, so that the terminal is based on the access network. The device performs channel estimation by using reference signals sent by all antenna port groups of the access network device, and the estimated channel matrix H includes channel information corresponding to all antenna ports. The terminal then selects the target precoding matrix W corresponding to the channel matrix H from the codebook notified by the access network device based on the channel matrix H. It should be noted that the target precoding matrix W may be equal to the product of the first matrix and the second matrix, and may also be equal to the Kronecker product of the first matrix and the second matrix. In the first scenario, the first matrix is used to select one antenna port group from all antenna port groups of the access network device, which is called a first antenna port group, and the second matrix includes each access network device. For the sub-precoding matrix corresponding to the antenna port group, the sub-precoding matrix w can be referred to the description of the first embodiment, that is, one sub-precoding matrix w is actually an antenna port group of the access network device corresponding to the existing one. Class B A precoding matrix w in the codebook, such that the N subprecoding matrices w can form a second matrix.

Based on the foregoing second scenario, the second configuration information includes: the number S of the partial antenna port groups of the first embodiment and the number of antenna ports of each of the S antenna port groups. In combination with the description of the second scenario, the access network device may determine, according to the total number of antenna ports of the S antenna port groups determined by the access network device, the codebook that is required to be used by the access network device, and then notify the terminal by using the first configuration information. The channel is estimated based on the reference signals sent by the access network device through the S antenna port groups, and the estimated channel matrix H includes channel information corresponding to all antenna ports in the S antenna port groups. The terminal then selects the target precoding matrix W corresponding to the channel matrix H from the codebook notified by the access network device based on the channel matrix H. It should be noted that the target precoding matrix W may be equal to the product of the first matrix and the second matrix, and may also be equal to the Kronecker product of the first matrix and the second matrix. The first matrix is configured to characterize a phase difference between wireless channels corresponding to each antenna port group in the S antenna port groups. The second matrix includes the sub-precoding matrix w corresponding to the S antenna port groups of the access network device. For the sub-precoding matrix w, refer to the description of the first embodiment, that is, a sub-precoding matrix w is actually connected. One antenna port group of the network access device corresponds to a precoding matrix w in the existing class B codebook, so that the S sub-precoding matrices w can form a second matrix.

Optionally, the indication information in the new codebook provided by the application may include two PMIs, where the target indication information includes a first precoding matrix indicating PMI and a second PMI, where the PMI may be a codebook index in the codebook. The first PMI is used to indicate the first matrix, and the second PMI is used to indicate the second matrix.

The content of the second configuration information in the two different scenarios and the process of determining the target precoding matrix W are described. The following describes the structure of the target precoding matrix in different scenarios from different scenarios.

1. In the first scenario:

In this scenario, the target precoding matrix W can be split into a two-level matrix, and can also be split into a three-level matrix. See the following possible implementation manners. In addition, in the following embodiments, the target precoding matrix W is divided into two levels of matrix as an example. For the structure of the third-level matrix, refer to the following embodiments:

(1) a first possible implementation manner: the second matrix includes a sub-precoding matrix corresponding to each of the plurality of antenna port groups of the access network device, where the first matrix is used Selecting a first antenna port group from the plurality of antenna port groups; the first matrix is

The second matrix is

The target precoding matrix is W, and

Wherein said

Indicates the length is

Matrix (ie

Yes

a matrix of row 1 columns, the k+1th element is 1 and the remaining elements are 0, the k is equal to any value in j ₁ , j ₂ ... j _N , an element in the first matrix 1 is, the other elements are all 0, the N is the number of antenna port groups on the access network device, and the M is the number of antenna ports in each antenna port group,

a phase difference between two polarized antennas on the access network device,

Equal to any one of {+1, -1, +j, -j}, the {a ₁ , a ₂ ... a _N } being determined according to the first PMI, the j ₁ , j ₂ . ..j _{N is} determined according to the second PMI.

Specifically, in the embodiment, the target precoding matrix

It can be split into two levels of matrix, which are a first matrix and a second matrix. One element in the first matrix is 1, and the other elements are all 0. Multiplying the first matrix and the second matrix is equivalent to An antenna port group is selected from all antenna port groups of the access network device, and the obtained target precoding matrix W is a precoding matrix corresponding to the first antenna port group selected for the first matrix. Optionally, the value of the first PMI determines a value of a ₁ , a ₂ ... a _N , and the value of the second PMI determines a value of j ₁ , j ₂ . . . _{N N} , optionally, The first PMI may include multiple values, and the second PMI may also include multiple values.

In order to explain the present embodiment more clearly, the access network device has two antenna port groups, and the number of antenna ports in each antenna port group is 4, that is, N=2, M=4, and the access network devices have a common 8 antenna ports. In this example,

Where a ₁ , a _{2 may have} a value of {0, 1}, and only one of a ₁ and a ₂ is 1. W ₂ is a second matrix, and W ₁ is a first matrix.

with

The sub precoding matrices w corresponding to the two antenna port groups respectively. The W ₁ and W ₂ are respectively indicated by independent indication information. For example, W ₁ is indicated by the first PMI, that is, the value of a ₁ , a ₂ is determined by the first PMI. Alternatively, the first PMI may be a wideband PMI or a sub-band PMI. W ₂ is indicated by the second PMI, that is, the values of j ₁ and j ₂ may be determined by the second PMI, and j ₁ may be equal to j ₂ or may not be equal to j ₂ . Optionally, the second PMI may be a sub-band PMI.

For the above example, optionally, the corresponding codebook structure may be shown in Table 1. The codebook structure shown in Table 1 is a new codebook provided by the present application.

Table 1

Table 1, target precoding matrix

The corresponding first PMI is i _1,1 , i _1,2 , and the corresponding second PMI is i _2,1 , i _2,2 , i _2,3 . That is, in this example, the first PMI includes two values, namely i _1,1 , i _1,2 , and the second PMI includes three values, namely i _2,1 , i _2,2 , i _2,3 And the phase difference between i _{2, 3} and the two polarized antennas on the access network device

correspond. Where i _1,1 is equal to the value of the a ₁ element in the first matrix, i _1,2 is equal to the value of the a ₂ element in the first matrix, and only one of a ₁ , a ₂ is 1, i ₂ , ₁ is equal to j ₁ , i ₂ , ₂ is equal to j ₂

In combination with the codebook shown in Table 1 above, it is assumed that the terminal device determines that the first PMI i _{1,1 of the} target precoding matrix W is equal to 0, i _1,2 is equal to 1, and the second PMI of the target precoding matrix W is i _{2 , 1} is equal to 0, i ₂ , ₂ is equal to 1, i ₂ , ₃ is equal to 1

The access network may determine the target precoding matrix according to the codebook shown in Table 1 above.

It can be seen from the above description that, in the target precoding matrix W in the present embodiment, the target precoding matrix W is a preamble corresponding to the first antenna port group selected for the first matrix due to the limitation of the value of the element in the first matrix. The coding matrix, therefore, reduces the problem of beam accuracy degradation caused by the difference between antenna port groups, so that the access network device performs downlink data processing using the target precoding matrix W for a first antenna port group When the beam directivity is clear, there will be no excessive beam side lobes.

(2) a second possible implementation manner: the second matrix includes a sub-precoding matrix corresponding to each of the plurality of antenna port groups of the access network device, where the first matrix is used Selecting a first antenna port group from the plurality of antenna port groups; the first matrix is

The second matrix is

The target precoding matrix is W, and

Wherein said

Indicates the length is

a matrix, the k being equal to any of j ₁ , j ₂ ... j _N ; the I _M representing an identity matrix of length M × M; {a ₁ , a ₂ ... a _N } One element is 1, and all other elements are 0. The N is the total number of antenna port groups on the access network device, and the M is the number of antenna ports in each antenna port group. Description

a phase difference between two polarized antennas on the access network device,

Specifically, in the embodiment, the target precoding matrix W is the same as the target precoding matrix in the first possible implementation manner, and both are

In this embodiment, the target precoding matrix W is also split into a two-level matrix. Different from the first possible implementation manner described above, in the embodiment, the first matrix is

The second matrix is

I _M denotes an identity matrix of length M × M. One element in {a ₁ , a ₂ ... a _N } in the first matrix is 1, and all other elements are 0. Alternatively, the value of the first PMI determines a ₁ , a ₂ ...a The value of _N , the value of the second PMI determines the value of j ₁ , j ₂ ... j _N . Optionally, the first PMI may include multiple values, and the second PMI may also include multiple values.

Where a ₁ , a _{2 may have} a value of {0, 1}, and only one of a ₁ and a ₂ is 1. W ₂ is the second matrix

W ₁ is the first matrix

with

The sub precoding matrices w corresponding to the two antenna port groups respectively. The W ₁ and W ₂ are respectively indicated by independent indication information. For example, W ₁ is indicated by the first PMI, that is, the value of a ₁ , a ₂ is determined by the first PMI. Alternatively, the first PMI may be a wideband PMI or a sub-band PMI. W ₂ is indicated by the second PMI, that is, the values of j ₁ and j ₂ may be determined by the second PMI, and j ₁ may be equal to j ₂ or may not be equal to j ₂ . Optionally, the second PMI may be a sub-band PMI. The target precoding matrix W in this example is the codebook structure shown in Table 1, and the access network device can determine the target from the codebook structure shown in Table 1 according to the first PMI and the second PMI reported by the terminal device. Precoding matrix W. In the present embodiment, regarding the correspondence between the first PMI, the second PMI, and i _1,1 , i _1,2 , i _2,1 , i _2,2 , i _{2,3 in} Table 1, see the above The first possible implementation manner will not be described here.

In the target precoding matrix W in this embodiment, the target precoding matrix W is the first selected for the first matrix due to the definition of the values of the elements of a ₁ , a ₂ ... a _N in the first matrix. The precoding matrix corresponding to the antenna port group, thereby reducing the problem of beam accuracy degradation caused by the difference between the antenna port groups, so that the access network device utilizes the target precoding for a first antenna port group When the matrix W performs downlink data processing, its beam directivity is clear, and excessive beam side lobes are not generated.

(3) a third possible implementation manner: the second matrix includes a sub-precoding matrix corresponding to each of the plurality of antenna port groups of the access network device, where the first matrix is used Selecting a first antenna port group from the plurality of antenna port groups; the first matrix is

The second matrix is

The target precoding matrix is

Wherein said

Indicates the length is

a matrix, the k is equal to j ₁ ; the I _M represents an identity matrix of length M × M; one element in {a ₁ , a ₂ ... a _N } is 1, and all other elements are 0, N is the total number of antenna port groups on the access network device, and the M is the number of antenna ports in each antenna port group,

a phase difference between two polarized antennas on the access network device,

Equal to any one of {+1, -1, +j, -j}, the {a ₁ , a ₂ ... a _N } being determined according to the first PMI, the j ₁ according to the first Two PMI confirmed.

Specifically, in the embodiment, the target precoding matrix

It is also split into a two-level matrix. Unlike the first possible implementation described above, the first matrix is

The second matrix is

I _M denotes an identity matrix of length M × M. One element in {a ₁ , a ₂ ... a _N } in the first matrix is 1, and all other elements are 0. Alternatively, the value of the first PMI determines a ₁ , a ₂ ...a The value of _N , the value of the second PMI determines the value of j ₁ . Optionally, the first PMI may include multiple values, and the second PMI may also include multiple values.

Where a ₁ , a _{2 may have} a value of {0, 1}, and only one of a ₁ and a ₂ is 1. W ₁ is the first matrix

W ₂ is the second matrix

The W ₁ and W ₂ are respectively indicated by independent indication information. For example, W ₁ is indicated by the first PMI, that is, the value of a ₁ , a ₂ is determined by the first PMI. Alternatively, the first PMI may be a wideband PMI or a sub-band PMI. W ₂ is indicated by the second PMI, ie the value of j can be determined by the second PMI. Optionally, the second PMI may be a sub-band PMI.

In this embodiment, the codebook structure is similar to that in Table 1. The codebook structure is preset on the access network device and the terminal device, so that when the terminal device reports the first PMI and the second PMI, the access network The device can then perform the target precoding matrix W based on the two indications, which is similar to the manner in which the target precoding matrix W is determined in the example of the first possible implementation.

2, the second scenario,

In this scenario, the structure of the target precoding matrix W can be split into a two-level matrix, and can also be split into a three-level matrix. See the following possible implementation manners. Taking the target precoding matrix as a two-level matrix as an example, the structure of the three-level matrix can be seen in the following embodiments:

(1) The first possible implementation manner: the second matrix includes a sub-precoding matrix corresponding to the S antenna port groups of the multiple antenna port groups, where the first matrix is used to represent the multiple antenna port groups The difference parameter between the corresponding wireless channels, the difference parameter in the above embodiment refers to the phase difference between the wireless channels corresponding to the plurality of antenna port groups characterized by the first matrix. The first matrix is

The second matrix is

Target precoding matrix

Wherein said

Indicates the length is

a matrix, the k being equal to any one of j ₁ , j ₂ ... j _N , the S being less than or equal to N, the N being the number of antenna port groups on the access network device, M is the number of antenna ports in each antenna port group,

a phase difference between two polarized antennas on the access network device,

Equal to any one of {+1, -1, +j, -j},

For the phase difference between the corresponding radio channels of each antenna port in the S antenna port groups, l=1,...,X-1,X is the value in the set {2,4,8,...}, the X a number of quantization bits equal to θ, the l being determined according to the first PMI, the j ₁ , j ₂ ... j _{N being} determined according to the second PMI.

Specifically, in this implementation manner, the access network device has a total of N antenna port groups, and the access network device instructs the terminal to select S antenna port groups for channel measurement (S is less than or equal to N), and therefore, the target determined by the terminal The precoding matrix W is a matrix determined based on reference signals transmitted by the S antenna port groups. Target precoding matrix

Can be split into two levels of matrix, respectively the first matrix

And second matrix

It can be known from the structure of the first matrix that the first matrix represents the phase difference between the radio channels corresponding to the antenna ports of the S antenna port groups, that is, the target precoding matrix W determined in this embodiment is based on the phase. The difference can be corrected by the beam corresponding to the S antenna port groups, avoiding excessive side lobes, increasing the beam shaping gain, and thereby increasing the capacity of the antenna. Optionally, the value of the first PMI determines a value of l, the value of l determines a value of θ, and the value of the second PMI determines a value of j ₁ , j ₂ ... j _N , optionally, The first PMI may include multiple values, and the second PMI may also include multiple values.

Wherein W ₂ is a second matrix, and W ₁ is a first matrix.

with

The sub precoding matrices w corresponding to the two antenna port groups respectively. The W ₁ and W ₂ are respectively indicated by independent indication information. For example, W ₁ is indicated by the first PMI, that is, the value of l is determined by the first PMI. Alternatively, the first PMI may be a wideband PMI or a subband PMI. W ₂ is indicated by the second PMI, ie j ₁ and j ₂ and

The value may be determined by the second PMI, j ₁ may be equal to j ₂ or may not be equal to j ₂ , and the second PMI may be a sub-band PMI. θ in W ₁ can also be scalar quantized (for example, quantizing θ with X values), and carried as a modulation symbol on the PUSCH and fed back to the access network device with the routing terminal.

For the above example, optionally, the corresponding codebook structure may be shown in Table 2. The codebook structure shown in Table 2 is a new codebook provided by the present application.

Table 2

Table 2, target precoding matrix

The corresponding first PMI is i ₁ , and the corresponding second PMI is i _2,1 , i _2,2 , i _2,3 . That is, in this example, the first PMI, i ₁ , takes any value of 0, ₁ , 2, 3, and the second PMI includes three values, namely i _2,1 , i _2,2 ,i _Phase difference between _2,3 and i _2,3 and two polarized antennas on the access network device

correspond. Wherein, the value of i ₁ is equal to 1, and the value of l determines the value of θ, i ₂ , ₁ is equal to j ₁ , and i ₂ , ₂ is equal to j ₂ . In addition, the value of the above i ₁ may be {0, 1, 2, 3}, which mainly depends on the number of quantization bits X of θ, and the maximum value of i ₁ is smaller than X; the value of the above i _{2, 3} may be Is {0,1,2,3}, which depends mainly on

The quantization bit; the value of the above i _2,1 , i _2,2 may be {0, 1}, which mainly depends on the number of antenna ports in one polarization direction.

In combination with the codebook shown in Table 2 above, it is assumed that the terminal device determines that the first PMI i ₁ of the target precoding matrix W is equal to 1, and the second PMI of the target precoding matrix W is i _{2, 1} is equal to 0, i ₂ , ₂ Equal to 1, i ₂ , ₃ equals

Then, the access network can be based on the general formula of the target precoding matrix W shown in Table 2 above, where l=i ₁ =1, j ₁ =i _2,1 =i _2,1 =0,j ₁ =i _2,2 =1

Determining the target precoding matrix

According to the foregoing description, in the target precoding matrix W, since the first matrix includes a phase difference between the radio channels corresponding to the S antenna port groups, the beam corresponding to the S antenna port groups may be corrected based on the phase difference. In order to avoid excessive side lobes, the beam shaping gain is increased, thereby increasing the capacity of the antenna.

(2) a second possible implementation manner: the second matrix includes a sub-precoding matrix corresponding to the S antenna port groups of the plurality of antenna port groups, where the first matrix is used to represent the multiple antenna port groups The phase difference between the corresponding wireless channels, the first matrix is

The second matrix is

Target precoding matrix

Wherein said

Indicates the length is

a phase difference between two polarized antennas on the access network device,

Equal to any one of {+1, -1, +j, -j},

Specifically, in this implementation manner, the access network device has a total of N antenna port groups, and the access network device instructs the terminal to select S antenna port groups for channel measurement (S is less than or equal to N), and therefore, the target determined by the terminal The precoding matrix W is a matrix determined based on reference signals transmitted by the S antenna port groups. In this embodiment, the target precoding matrix W is the same as the target precoding matrix in the first possible implementation manner in the second scenario.

The second matrix is

I _M denotes an identity matrix of length M × M. It can be known from the structure of the first matrix that the first matrix represents the phase difference between the radio channels corresponding to the antenna ports of the S antenna port groups, that is, the target precoding matrix W determined in this embodiment is based on the phase. The difference can be corrected by the beam corresponding to the S antenna port groups, avoiding excessive side lobes, increasing the beam shaping gain, and thereby increasing the capacity of the antenna. Optionally, the value of the first PMI determines a value of l, the value of l determines a value of θ, and the value of the second PMI determines a value of j ₁ , j ₂ ... j _N , optionally, The first PMI may include multiple values, and the second PMI may also include multiple values.

I ₄ represents a 4×4 identity matrix, and W ₂ is a second matrix.

W ₁ is the first matrix

with

The first sub-precoding matrix w corresponding to the two antenna port groups respectively. The W ₁ and W ₂ are respectively indicated by independent indication information. For example, W ₁ is indicated by the first PMI, that is, the value of l is determined by the first PMI. Alternatively, the first PMI may be a wideband PMI or a subband PMI. W ₂ is indicated by the second PMI, ie j ₁ and j ₂ and

The value may be determined by the second PMI, j ₁ may be equal to j ₂ or may not be equal to j ₂ , and the second PMI is a sub-band PMI. θ in W ₁ can also be scalar quantized (for example, quantizing θ with X values), and carried as a modulation symbol on the PUSCH and fed back to the access network device with the routing terminal.

The target precoding matrix W in this example is the codebook structure shown in Table 2 above. The access network device can determine the target from the codebook structure shown in Table 2 according to the first PMI and the second PMI reported by the terminal device. Precoding matrix W. In this embodiment, regarding the correspondence between the first PMI, the second PMI, and i ₁ , i _2,1 , i ₂ , ₂ , i ₂ , _{3 in} Table 1, refer to the first in the second scenario. A possible implementation manner will not be described herein.

In the target precoding matrix W of this embodiment, since the first matrix includes a phase difference between the radio channels corresponding to the S antenna port groups, the beam corresponding to the S antenna port groups can be corrected based on the phase difference. In order to avoid excessive side lobes, the beam shaping gain is increased, thereby increasing the capacity of the antenna.

(3) a third possible implementation manner: the second matrix includes a sub-precoding matrix corresponding to the S antenna port groups of the multiple antenna port groups, where the first matrix is used to represent the multiple antenna port groups The phase difference between the corresponding wireless channels, the first matrix is

The second matrix is

Target precoding matrix

Wherein said

Indicates the length is

a matrix, the k is equal to j ₁ , the S is less than or equal to N, the N is the number of antenna port groups on the access network device, and the M is the number of antenna ports in each antenna port group , said

a phase difference between two polarized antennas on the access network device,

Equal to any one of {+1, -1, +j, -j},

For the phase difference between the corresponding radio channels of each antenna port in the S antenna port groups, l=1,...,X-1,X is the value in the set {2,4,8,...}, the X a number of quantization bits equal to θ, the 1 being determined according to the first PMI, and the j _{1 is} corresponding according to the second PMI.

Specifically, in the embodiment, the target precoding matrix

The second matrix is

I _M denotes an identity matrix of length M × M. It can be known from the structure of the first matrix that the first matrix represents the phase difference between the radio channels corresponding to the antenna ports of the S antenna port groups, that is, the target precoding matrix W determined in this embodiment is based on the phase. The difference can be corrected by the beam corresponding to the S antenna port groups, avoiding excessive side lobes, increasing the beam shaping gain, and thereby increasing the capacity of the antenna. Optionally, the value of the first PMI determines a value of l, the value of l determines a value of θ, and the value of the second PMI determines a value of j ₁ . Optionally, the first PMI may include multiple values. The second PMI may also include multiple values.

W ₁ is the first matrix

W ₂ is the second matrix

The W ₁ and W ₂ are respectively indicated by independent indication information. For example, W ₁ is indicated by the first PMI, that is, the value of l is determined by the first PMI. Alternatively, the first PMI may be a wideband PMI or a subband PMI. W ₂ is indicated by the second PMI, ie the value of j ₁ can be determined by the second PMI, which is a sub-band PMI. θ in W ₁ can also be scalar quantized (for example, quantizing θ with X values), and carried as a modulation symbol on the PUSCH and fed back to the access network device with the routing terminal.

In this embodiment, the codebook structure is similar to that in Table 2. The codebook structure is preset on the access network device and the terminal device, so that when the terminal device reports the first PMI and the second PMI, the access network The device can perform the target precoding matrix W based on the two indication information, which is similar to the method for determining the target precoding matrix W in the example of the first possible implementation manner in the second scenario. Let me repeat.

In summary, the first matrix split by the target precoding matrix W is used to select the first antenna port group from the plurality of antenna port groups of the access network device, or to characterize the S antennas. The phase difference between the radio channels corresponding to each antenna port group in the port group can avoid excessive side lobes of the beam corresponding to the antenna panel of the access network device, thereby improving beamforming gain and increasing the antenna. Capacity.

As another possible implementation manner of the present application, the channel state information reported by the terminal to the access network device may further include third indication information with a value of 0. Therefore, the access network device may be based on the foregoing first PMI, The second PMI and the third indication information whose value is 0, the third indication information may be a third PMI, where the third PMI is used to indicate the third matrix. The target precoding matrix W is determined from the new codebook provided by the present application. That is to say, in the embodiment, the target precoding matrix W can be split into three matrices, which are respectively a product of the first matrix, the second matrix and the third matrix, and the third matrix is a unit matrix, the unit The number of rows and columns of the matrix are equal to the total number of antenna ports of the access network device.

Therefore, in combination with the first scenario and the second scenario described above, the following possible implementation manners are respectively started from two scenarios, and the specific case where the target precoding matrix W can be split into three levels of matrix is introduced:

1, the first scene

(1) The first implementation:

In this implementation,

The target precoding matrix W in the implementation manner is the same as the W of the two-level matrix in the first scenario, and the parameter interpretation is the same, and details are not described herein again. Wherein the first matrix is

The second matrix is

The third matrix I _MN is an identity matrix of (M × N) × (M × N).

with

The first sub-precoding matrix w corresponding to the two antenna port groups respectively. The W ₁ and W ₂ are respectively indicated by independent indication information. The W ₁ and W ₂ are respectively indicated by independent indication information. For example, W ₁ is indicated by the first PMI, that is, the value of a ₁ , a ₂ is determined by the first PMI. Alternatively, the first PMI may be a wideband PMI or a sub-band PMI. W ₂ is indicated by the second PMI, that is, the values of j ₁ and j ₂ may be determined by the second PMI, and j ₁ may be equal to j ₂ or may not be equal to j ₂ . Optionally, the second PMI may be a sub-band PMI.

For the above example, optionally, the corresponding codebook structure may be shown in Table 3. The codebook structure shown in Table 3 is a new codebook provided by the present application.

table 3

Table 3, target precoding matrix

The corresponding first PMI is i _3,1 , i _3,2 , and the corresponding second PMI is i _2,1 , i _2,2 , i _2,3 , and the corresponding third indication information is i ₁ . That is, in this example, the first PMI includes two values, namely i _3,1 , i _3,2 , and the second PMI includes three values, namely i _2,1 , i _2,2 , i _2,3 And the phase difference between i _{2, 3} and the two polarized antennas on the access network device

correspond. Where i _3,1 is equal to the value of the a ₁ element in the first matrix, i _3,2 is equal to the value of the a ₂ element in the first matrix, and only one of a ₁ , a ₂ is 1, i ₂ , ₁ is equal to j ₁ , i ₂ , ₂ is equal to j ₂ .

(2) The second implementation:

In this implementation,

The second matrix is

The third matrix I _MN is an identity matrix of (M × N) × (M × N).

with

The sub precoding matrices w corresponding to the two antenna port groups respectively. The W ₁ and W ₂ are respectively indicated by independent indication information. The W ₁ and W ₂ are respectively indicated by independent indication information. For example, W ₁ is indicated by the first PMI, that is, the value of a ₁ , a ₂ is determined by the first PMI. Alternatively, the first PMI may be a wideband PMI or a sub-band PMI. W ₂ is indicated by the second PMI, that is, the values of j ₁ and j ₂ may be determined by the second PMI, and j ₁ may be equal to j ₂ or may not be equal to j ₂ . Optionally, the second PMI may be a sub-band PMI.

For the above example, optionally, it may also correspond to the codebook structure shown in Table 3 above, and details are not described herein again.

2, the second scenario

(1) The first implementation:

In this implementation,

The target precoding matrix W in the implementation manner is the same as the W of the two-level matrix in the second scenario, and the parameter interpretation is the same, and details are not described herein again. Wherein the first matrix is

The second matrix is

The third matrix I _MN is an identity matrix of (M × N) × (M × N).

Wherein W ₂ is a second matrix, and W ₁ is a first matrix.

with

For the above example, optionally, the corresponding codebook structure may be shown in Table 4. The codebook structure shown in Table 4 is a new codebook provided by the present application.

Table 4

Table 4, target precoding matrix

The corresponding first PMI is i ₃ , the corresponding second PMI is i _2,1 , i _2,2 , i _2,3 , and the corresponding third indication information is i ₁ . That is, in this example, the first PMI, i ₃ , takes any value of 0, 1, 2, ₃ , and the second PMI includes three values, namely i _2,1 , i _2,2 ,i _Phase difference between _2,3 and i _2,3 and two polarized antennas on the access network device

Correspondingly, the value of i ₁ is always zero. Wherein, the value of i ₃ is equal to 1, and the value of l determines the value of θ, i ₂ , ₁ is equal to j ₁ , and i ₂ , ₂ is equal to j ₂ . In addition, the value of the above i ₃ may be {0, 1, 2, 3}, which mainly depends on the number of quantization bits X of θ, and the maximum value of i ₃ is smaller than X; the value of the above i _{2, 3} may be Is {0,1,2,3}, which depends mainly on

(2) The second implementation:

In this implementation,

The second matrix is

The third matrix I _MN is an identity matrix of (M × N) × (M × N).

Wherein W ₂ is a second matrix, and W ₁ is a first matrix.

with

The value may be determined by the second PMI, j ₁ may be equal to j ₂ or may not be equal to j ₂ , and the second PMI is a sub-band PMI. θ in W ₁ can also be scalar quantized (for example, quantizing θ with X values), and carried as a modulation symbol on the PUSCH, and fed back to the access network device with the routing terminal, the third indication information is always equal to zero.

For the example, the codebook structure shown in Table 4 above may also be selected, and details are not described herein again.

As another possible implementation of the present application, this embodiment provides a structure of another target precoding matrix W. It should be noted that, in the foregoing embodiment, one antenna port group corresponds to one sub-precoding matrix w. In this embodiment, each polarization direction of each antenna port group corresponds to one sub-precoding matrix w, where the sub-precoding matrix is used. w is

Specifically, in this embodiment, the target precoding matrix W is also introduced from the above two scenarios.

1, the first scene

In this scenario,

Said

Representing a matrix of length 2 × 1, the k being equal to any of k ₁ , k ₂ ... k _N , one element in {a ₁ , a ₂ ... a _N } is 1, other elements All are 0, the N is the total number of polarization directions of the antenna port group on the access network device, and the {a ₁ , a ₂ ... a _N } is determined according to the first PMI. Said j ₁ , j ₂ ... j _{N are} determined according to the second PMI.

The target precoding matrix W can be split into two levels of matrix, ie

Wherein the first matrix is

The second matrix is

Of course, it can be split into a three-level matrix, and the split third matrix is a unit matrix. For details, refer to the description of the foregoing embodiment, and details are not described herein again.

In order to more clearly illustrate the present embodiment, the access network device has two antenna port groups, and the polarization direction in each antenna port group is 2, that is, N=4. In this example,

W corresponds to a two-level matrix of the first matrix and the second matrix, and the first matrix is

The second matrix is

(a ₁ , a ₂ , a ₃ , a ₄ ) corresponds to the first PMI, that is, the value of the first PMI determines the respective values of (a ₁ , a ₂ , a ₃ , a ₄ ), (a ₁ , a ₂ , a ₃ , a ₄ ) only one is 1, the rest are 0, (k ₁ , k ₂ , k ₃ , k ₄ ) corresponds to the second PMI, ie the value of the second PMI determines (k ₁ , k ₂ , k ₃ , k ₄ ). Wherein, (k ₁ , k ₂ , k ₃ , k ₄ ) may be the same or different. Additionally, the first PMI can be a wideband PMI or a subband PMI. The second PMI can be a subband PMI.

For the above example, optionally, the corresponding codebook structure may be shown in Table 5. The codebook structure shown in Table 5 is a new codebook provided by the present application.

table 5

Table 5, target precoding matrix

Corresponding first PMI is i _1,1 , i _1,2 , i _1,3 , i _1,4 , and the corresponding second PMI is i _2,1 , i _2,2 , i _2,3 , i _{2, 4} . That is, in this example, the first PMI includes four values, namely i _1,1 , i _1,2 , i _1,3 , i _1,4 , and the second PMI includes four values, respectively i _2,1 , i ₂ , ₂ , i ₂ , ₃ , i ₂ , ₄ . Where i _1,1 is equal to the value of the a ₁ element in the first matrix, i _1,2 is equal to the value of the a ₂ element in the first matrix, i _1,3 is equal to the value of the a ₃ element in the first matrix, i _{1, 4} is equal to the value of the a ₄ element in the first matrix, i _2,1 is equal to k ₁ , i _2,2 is equal to k ₂ , i _2,3 is equal to k ₃ , i _2,2 is equal to k ₄ .

2, the second scenario

In this scenario,

Said

Representing a matrix of length 2×1, the k being equal to any value of k ₁ , k ₂ ... k _S , the S being less than or equal to N, the N being an antenna port on the access network device The total number of polarization directions of the group,

Representing a phase difference between different polarization directions,

Equal to any of {+1, -1, +j, -j}, l = 1, ..., X-1, X is the value in the set {2, 4, 8, ...}, the X is equal to Quantitative bit number of θ, said

According to the first PMI correspondence, the k ₁ , k ₂ ... k _S correspond according to the second PMI.

The target precoding matrix W can be split into two levels of matrix, ie

Wherein the first matrix is

The second matrix is

In order to more clearly illustrate the present embodiment, the access network device has two antenna port groups, and the polarization direction in each antenna port group is 2, that is, N=2. In this example,

The second matrix is

Corresponding to the first PMI, that is, the value of the first PMI determines

The respective values, (k ₁ , k ₂ , k ₃ , k ₄ ) correspond to the second PMI, that is, the value of the second PMI determines (k ₁ , k ₂ , k ₃ , k ₄ ). Wherein, (k ₁ , k ₂ , k ₃ , k ₄ ) may be the same or different.

It is also possible to perform scalar quantization (eg with X value pairs)

The quantization is performed, and is carried as a modulation symbol on the PUSCH and fed back to the access network device along with the routing terminal. Additionally, the first PMI can be a wideband PMI or a subband PMI. The second PMI can be a subband PMI.

For the above example, optionally, the corresponding codebook structure may be shown in Table 6. The codebook structure shown in Table 6 is a new codebook provided by the present application.

Table 6

Table 6, target precoding matrix

The corresponding first PMI is i _1,1 , i _1,2 , i _1,3, and the corresponding second PMI is i _2,1 , i _2,2 , i _2,3 , i _2,4 . That is, in this example, the first PMI includes three values, respectively i _1,1 , i _1,2 , i _1,3, and the second PMI includes four values, namely i _2,1 , i _{2 , 2} , i ₂ , ₃ , i ₂ , ₄ . Wherein, the value of i _1,1, is equal to l ₁ _, the value of i _1,2, is equal to l ₂ _, the value of i _1,3, is equal to l ₃ , i _2,1 is equal to k ₁ , i _2,2 is equal to k ₂ , i ₂ , ₃ is equal to k ₃ , i ₂ , ₂ is equal to k ₄ .

As another possible implementation of the present application, this embodiment provides a structure of another target precoding matrix W. In the present embodiment, the target precoding matrix W is also introduced from the above two scenarios.

1, the first scene

Target precoding matrix in this scenario

In the target precoding matrix W,

with

Is a matrix of dimensions 2 x 1, the elements of the matrix represent multiple beams on the same panel, and the elements of the matrix may contain amplitude information or phase information. One of the above elements {a ₁ , a ₂ ... a _N } is 1, and all other elements are 0 (ie, {a ₁ , a ₂ ... a _N } is a panel selection factor), optionally, { a ₁ , a ₂ ... a _N } can also be an amplitude factor, and the value range is a real number between 0 and 1. Optionally, the {a ₁ , a ₂ ... a _N } is corresponding to the first PMI, and the

with

Corresponding according to the second PMI. Optional, in the second matrix

with

The scalar quantization can also be performed as a modulation symbol carried on the PUSCH and fed back to the access network device.

Optionally, the target precoding matrix can be split into two levels of matrix, ie

W ₁ is the first matrix

W ₂ is the second matrix

N is the number of antenna port groups on the access network device, the M is the number of antenna ports in each antenna port group, and I _M is a unit matrix of M*M.

Optionally, the target precoding matrix can be split into a three-level matrix, that is,

Where W ₁ is the first matrix

W ₂ is the second matrix

W ₃ is the unit matrix I _M of M* _M . N is the number of antenna port groups on the access network device, and the M is the number of antenna ports in each antenna port group. Optionally, the {a ₁ , a ₂ ... a _N } is corresponding to the first PMI, and the

with

According to the second PMI correspondence, I _M corresponds to a third PMI that is always 0.

For example, when the access network device has two antenna port groups, the number of antenna ports in each antenna port group is 4, that is, N=2, M=4, and the access network device has 8 antenna ports. In this example,

The target precoding matrix is split into a two-level matrix.

When the target precoding matrix is split into three levels of matrix, it can be:

2, the second scenario

Target precoding matrix in this scenario

In the target precoding matrix W,

with

Is a matrix of dimensions 2 x 1, the elements of the matrix represent multiple beams on the same panel, and the elements of the matrix may contain amplitude information or phase information. The S is less than or equal to N, where N is the total number of antenna port packets on the access network device, and the M is the number of antenna ports in each antenna port group.

The phase difference between the radio channels corresponding to each antenna port group in the S antenna port groups, l=1, . . . , X-1, X is the value in the set {2, 4, 8, ...}, the X a number of quantization bits equal to θ, the 1 being determined according to the first PMI,

with

Determined according to the second PMI. Optionally, in the second matrix

with

W ₁ is the first matrix

W ₂ is the second matrix

S is the total number of partial antenna port groups selected by the access network device for the access network device, where M is the number of antenna ports in each antenna port group, and I _M is a unit of M*M Array according to the first PMI, the

with

Corresponding according to the second PMI.

W ₁ is the first matrix

W ₂ is the second matrix

W ₃ is a third matrix I _M corresponding to the first PMI,

with

Corresponding to the second PMI, I _M corresponds to a third PMI that is always 0.

For example, when the access network device has three antenna port groups, the number of antenna ports in each antenna port group is 4, that is, S=2, M=4, and the access network device has 8 antenna ports. In this example,

The target precoding matrix is split into a two-level matrix.

In summary, the present application provides a plurality of target precoding matrices W, each of which takes into account a difference parameter between antenna port groups, or the target precoding matrix W may be for a first antenna. The precoding matrix of the port group, therefore, even if there are multiple antenna panels in the access network device, and the spacing of the plurality of antenna panel arrays is not uniform, the target precoding matrix W can correct the directivity of the multiple beams, thereby avoiding generation The multiple side lobes increase the beamforming gain, which in turn increases the antenna capacity.

FIG. 3 is a schematic structural diagram of an embodiment of a terminal provided by the present application. In this embodiment, the terminal can be implemented by software, hardware, or a combination of software and hardware. As shown in FIG. 3, the terminal includes: a determining module 301 and a sending module 302.

The determining module 301 is configured to obtain a target precoding matrix based on a reference signal sent by the access network device by using multiple antenna port groups, and determine target indication information corresponding to the target precoding matrix according to the codebook, where the codebook And including a correspondence between a precoding matrix that is a product of a first matrix and a second matrix, where the first matrix is used to select a first antenna port from the plurality of antenna port groups a group or a parameter for characterizing a difference between the plurality of antenna port groups, the second matrix comprising a sub-precoding matrix corresponding to a part or all of the antenna port groups of the plurality of antenna port groups;

The sending module 302 is configured to send the target indication information to an access network device.

On the basis of the foregoing embodiments, FIG. 4 is a schematic structural diagram of another embodiment of the terminal provided by the present application. As shown in FIG. 4, the terminal further includes: a first receiving module 303. The first receiving module 303 is configured to receive first configuration information from the access network device before the determining module 301 obtains the target precoding matrix, where the first configuration information is used to indicate that the terminal uses The codebook.

On the basis of the foregoing embodiments, FIG. 5 is a schematic structural diagram of another embodiment of the terminal provided by the present application. As shown in FIG. 5, the terminal further includes: a second receiving module 304. The second receiving module 304 is configured to receive second configuration information from the access network device before the determining module 301 obtains the target precoding matrix, where the second configuration information is used to configure the codebook. parameter.

Optionally, the indication information includes a first precoding matrix indicating a PMI and a second PMI, where the first PMI is used to indicate the first matrix, and the second PMI is used to indicate the second matrix.

Optionally, the second matrix includes a sub-precoding matrix corresponding to the S antenna port groups of the multiple antenna port groups, where the first matrix is used to represent the wireless channel corresponding to the multiple antenna port groups. Phase difference; the first matrix is

The second matrix is

The target precoding matrix is W, and

Wherein said

Indicates the length is

a matrix, the k being equal to any one of j ₁ , j ₂ ... j _N , the S being less than or equal to N, the N being the number of antenna port groups of the access network device, M is the number of antenna ports in the antenna port group,

a phase difference between two polarization directions of the antenna port group,

Equal to any one of {+1, -1, +j, -j},

a phase difference between the radio channels corresponding to the S antenna port groups, l=1, . . . , X-1, where X is equal to the number of quantization bits of θ, and the l is determined according to the first PMI, the j ₁ , j ₂ ... j _{N are} determined according to the second PMI.

Optionally, the second matrix includes a sub-precoding matrix corresponding to each of the multiple antenna port groups of the access network device, where the first matrix is used to Selecting a first antenna port group in the antenna port group; the first matrix is

The second matrix is

The target precoding matrix is W, and

Wherein said

Indicates the length is

a matrix, the k being equal to any one of j ₁ , j ₂ ... j _N , one element in the first matrix is 1, and the other elements are all 0, and the N is the access network The number of antenna port groups on the device, where M is the number of antenna ports in each antenna port group,

a phase difference between two polarized antennas on the access network device,

The terminal provided by the present application can perform the foregoing embodiment of the method for transmitting the information, and the implementation principle and the technical effect are similar, and details are not described herein again.

It should be noted that the division of each module of the above terminal is only a division of a logical function, and the actual implementation may be integrated into one physical entity in whole or in part, or may be physically separated. And these modules can all be implemented by software in the form of processing component calls; or all of them can be realized in the form of hardware; some modules can be realized by software in the form of processing component calls, and some modules are realized by hardware. For example, the determining module may be a separately set processing element, or may be integrated in a certain chip of the terminal, or may be stored in a memory of the terminal in the form of a program, and is called and executed by a processing element of the terminal. The function of the module. The implementation of other modules is similar. In addition, all or part of these modules can be integrated or implemented independently. The processing elements described herein can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules may be completed by an integrated logic circuit of hardware in the processor element or an instruction in a form of software. In addition, each of the above receiving modules is a module for controlling reception, and the information transmitted by the base station can be received by the receiving device of the terminal, such as an antenna and a radio frequency device. The above sending module is a module for controlling transmission, and can send information to the base station through a transmitting device of the terminal, such as an antenna and a radio frequency device.

The above modules may be one or more integrated circuits configured to implement the above methods, such as one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (digital singnal processor) , DSP), or one or more Field Programmable Gate Arrays (FPGAs). As another example, when one of the above modules is implemented in the form of a processing component scheduler, the processing component can be a general purpose processor, such as a central processing unit (CPU) or other processor that can invoke the program. As another example, these modules can be integrated and implemented in the form of a system-on-a-chip (SOC).

FIG. 6A is a schematic structural diagram of another embodiment of a terminal provided by the present application. As shown in FIG. 6A, the terminal can include a transmitter 160, a memory 161, a processor 162, and at least one communication bus 163. Communication bus 163 is used to implement a communication connection between components. Memory 161 may include high speed RAM memory, and may also include non-volatile memory NVM, such as at least one disk memory, in which various programs may be stored for performing various processing functions and implementing the method steps of the present embodiments. Optionally, the terminal may further include a receiver 164. In this embodiment, the transmitter 160 may be a radio frequency module or a baseband module in the terminal, and the receiver 164 may also be a radio frequency module or a baseband module in the terminal. Wherein both transmitter 160 and receiver 164 are coupled to the processor 162.

Specifically, in this embodiment, the processor 162 is configured to obtain a target precoding matrix based on a reference signal sent by the access network device by using multiple antenna port groups, and determine, according to the codebook, the target precoding matrix. a target indication information, where the codebook includes a correspondence between a precoding matrix and a first matrix, where the precoding matrix is a product of a first matrix and a second matrix, where the first matrix is used to Selecting a first antenna port group in the port group or for characterizing a difference parameter between the plurality of antenna port groups, the second matrix including a sub-pre-corresponding to a part or all of the antenna port groups of the plurality of antenna port groups Coding matrix

The transmitter 160 is configured to send the target indication information to an access network device.

Optionally, the receiver 164 is configured to receive first configuration information from the access network device, where the first configuration information is used to indicate the terminal, before the processor 162 obtains a target precoding matrix. The codebook employed.

Optionally, the receiver 164 is further configured to: before the processor 162 acquires the target precoding matrix, receive second configuration information from the access network device, where the second configuration information is used to configure the The codebook's parameters.

The second matrix is

The target precoding matrix is W, and

Wherein said

Indicates the length is

Equal to any one of {+1, -1, +j, -j},

The second matrix is

The target precoding matrix is W, and

Wherein said

Indicates the length is

a phase difference between two polarized antennas on the access network device,

FIG. 6B is a schematic structural diagram of another embodiment of a terminal provided by the present application. Referring to FIG. 6B, the terminal includes: a processor 110, a memory 120, and a transceiver 130. The transceiver device 130 can be connected to an antenna. In the downlink direction, the transceiver 130 receives the information transmitted by the network device through the antenna, and transmits the information to the processor 110 for processing. In the uplink direction, the processor 110 processes the data of the terminal and sends the data to the network device through the transceiver 130.

The memory 120 is used to store a program for implementing the above method embodiments, or the modules of the embodiment shown in FIG. 3 to FIG. 5, and the processor 110 calls the program to perform the operations of the foregoing method embodiments to implement the operations of the foregoing method. Each module shown.

Alternatively, part or all of the above units may be implemented by being embedded in a chip of the terminal in the form of an integrated circuit. And they can be implemented separately or integrated. That is, the above units may be configured to implement one or more integrated circuits of the above method, for example, one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (digital singnal processor) , DSP), or one or more Field Programmable Gate Arrays (FPGAs).

FIG. 7 is a schematic structural diagram of an embodiment of an access network device provided by the present application. In this embodiment, the access network device can be implemented by using software, hardware, or a combination of software and hardware. Optionally, the access network device sends information through multiple antenna port groups. As shown in FIG. 7, the access network device includes: a receiving module 701 and a determining module 702.

The receiving module 701 is configured to receive channel state information reported by the terminal, where the channel state information includes target indication information.

a determining module 702, configured to determine, according to the codebook, a target precoding matrix corresponding to the target indication information, where the codebook includes a correspondence between the indication information and a precoding matrix, where the precoding matrix is a first matrix and a second matrix a first matrix for selecting a first antenna port group from the plurality of antenna port groups or for characterizing a difference parameter between the plurality of antenna port groups, the second matrix comprising the A sub-precoding matrix corresponding to some or all of the antenna port groups of the plurality of antenna port groups.

On the basis of the foregoing embodiments, FIG. 8 is a schematic structural diagram of another embodiment of an access network device provided by the present application. As shown in FIG. 8, the access network device further includes: a first sending module 703. The first sending module 703 is configured to send first configuration information to the terminal, where the first configuration information is used to configure the terminal to use the codebook.

On the basis of the foregoing embodiments, FIG. 9 is a schematic structural diagram of another embodiment of an access network device provided by the present application. As shown in FIG. 9, the access network device further includes: a second sending module 704. The second sending module 704 is configured to send second configuration information to the terminal before the receiving module 701 receives channel state information reported by the terminal, where the second configuration information is used to configure parameters of the codebook. .

The second matrix is

The target precoding matrix is W, and

Wherein said

Indicates the length is

a matrix, the k is equal to any one of j ₁ , j ₂ ... j _N , the S is less than or equal to N, and the N is the number of antenna port groups on the access network device, the M For the number of antenna ports in each antenna port group,

a phase difference between two polarized antennas on the access network device,

Equal to any one of {+1, -1, +j, -j},

For each antenna port of the S antenna port groups, group the phase difference between the corresponding wireless channels, l=1, . . . , X-1, where X is equal to the number of quantization bits of θ, and the 1 is according to the first PMI It is determined that the j ₁ , j ₂ ... j _{N are} determined according to the second PMI.

Optionally, the second matrix includes a sub-precoding matrix corresponding to each of the plurality of antenna port groups of the access network device, where the matrix is used to Selecting a first antenna port group in the antenna port group; the first matrix is

The second matrix is

Target precoding matrix

Wherein said

Indicates the length is

a phase difference between two polarized antennas on the access network device,

Equal to any one of {+1, -1, +j, -j}, said {a ₁ , a ₂ ... a _N } according to said first PMI, said j ₁ , j ₂ .. .j _{N is} determined according to the second PMI.

An access network device provided by the present application may perform an embodiment of the foregoing method for transmitting information, and the implementation principle and technical effects thereof are similar, and details are not described herein again.

It should be noted that the division of each module of the access network device is only a division of logical functions, and may be integrated into one physical entity or physically separated in whole or in part. And these modules can all be implemented by software in the form of processing component calls; or all of them can be realized in the form of hardware; some modules can be realized by software in the form of processing component calls, and some modules are realized by hardware. For example, the determining module may be a separately set processing element, or may be integrated in one of the above-mentioned devices, or may be stored in the memory of the above device in the form of a program, by one of the access network devices. The processing component invokes and performs the function of determining the module. The implementation of other modules is similar. In addition, all or part of these modules can be integrated or implemented independently. The processing elements described herein can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules may be completed by an integrated logic circuit of hardware in the processor element or an instruction in a form of software. In addition, the above sending module is a module for controlling transmission, and can send information to the terminal through a transmitting device of the access network device, such as an antenna and a radio frequency device. The receiving module is a module for controlling receiving, and can receive information sent by the terminal through a receiving device of the access network device, such as an antenna and a radio frequency device.

FIG. 10A is a schematic structural diagram of another embodiment of an access network device according to the present application. Optionally, the access network device sends information through multiple antenna port groups. As shown in FIG. 10A, the station access network device can include a receiver 30, a memory 31, a processor 32, and at least one communication bus 33. The communication bus 33 is used to implement a communication connection between components. Memory 31 may include high speed RAM memory and may also include non-volatile memory NVM, such as at least one disk memory, in which various programs may be stored for performing various processing functions and implementing the method steps of the present embodiments. Optionally, the access network device may further include a transmitter 34.

Specifically, in the embodiment, the receiver 30 is configured to receive channel state information reported by the terminal, where the channel state information includes target indication information;

The processor 32 is configured to determine, according to the codebook, a target precoding matrix corresponding to the target indication information, where the codebook includes a correspondence between the indication information and a precoding matrix, where the precoding matrix is a first matrix and a a product of two matrices for selecting a first antenna port group from the plurality of antenna port groups or for characterizing a difference parameter between the plurality of antenna port groups, the second matrix comprising a sub-precoding matrix corresponding to a part or all of the antenna port groups of the plurality of antenna port groups.

Optionally, the sender 34 is configured to send first configuration information to the terminal, where the first configuration information is used to configure the terminal to use the codebook.

Optionally, the sender 34 is further configured to send second configuration information to the terminal, where the second configuration information is used to configure parameters of the codebook.

The second matrix is

The target precoding matrix is W, and

Wherein said

Indicates the length is

a phase difference between two polarized antennas on the access network device,

Equal to any one of {+1, -1, +j, -j},

The second matrix is

Target precoding matrix

Wherein said

Indicates the length is

a phase difference between two polarized antennas on the access network device,

FIG. 10B is a schematic structural diagram of another embodiment of an access network device provided by the present application. Referring to FIG. 10B, the access network device includes an antenna 110, a radio frequency device 120, and a baseband device 130. The antenna 110 is connected to the radio frequency device 120. In the uplink direction, the radio frequency device 120 receives the information transmitted by the terminal through the antenna 110, and transmits the information sent by the terminal to the baseband device 130 for processing. In the downlink direction, the baseband device 130 processes the information of the terminal and sends it to the radio frequency device 120. The radio frequency device 120 processes the information of the terminal and sends it to the terminal through the antenna 111.

The above access network device may be located in the baseband device 130. In one implementation, the above various units are implemented in the form of a processing component scheduler, for example, the baseband device 130 includes a processing component 131 and a storage component 132, and the processing component 131 calls the storage component 132 to store The program to perform the method in the above method embodiment. In addition, the baseband device 130 may further include an interface 133 for interacting with the radio frequency device 120, such as a common public radio interface (CPRI).

In another implementation, the above units may be one or more processing elements configured to implement the above methods, the processing elements being disposed on the baseband device 130, where the processing elements may be integrated circuits, such as: one or more ASICs, or one or more DSPs, or one or more FPGAs, etc. These integrated circuits can be integrated to form a chip.

For example, the above various units may be integrated together in the form of a system-on-a-chip (SOC), for example, the baseband device 130 includes a SOC chip for implementing the above method. The processing element 131 and the storage element 132 may be integrated into the chip, and the functions of the above method or the above units may be implemented by the processing element 131 in the form of a stored program that calls the storage element 132; or, at least one integrated circuit may be integrated into the chip. The functions of the above methods or the above units may be implemented; or, in combination with the above implementation manners, the functions of some units are implemented in the form of processing component calling programs, and the functions of some units are implemented in the form of integrated circuits.

In any case, the above access network device comprises at least one processing element, a storage element and a communication interface, wherein at least one processing element is used to perform the method provided by the above method embodiments. The processing element may perform some or all of the steps in the above method embodiments in a manner of executing the program stored in the storage element in the first manner; or in the second manner: through the integrated logic circuit of the hardware in the processor element Some or all of the steps in the foregoing method embodiments are performed in combination with the instructions. Of course, the methods provided in the foregoing method embodiments may also be implemented in combination with the first mode and the second mode.

The processing elements herein are the same as described above, and may be a general purpose processor, such as a Central Processing Unit (CPU), or may be one or more integrated circuits configured to implement the above method, for example: one or more specific An Application Specific Integrated Circuit (ASIC), or one or more digital singnal processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs).

The storage element can be a memory or a collective name for a plurality of storage elements.

Claims

A method for transmitting information, comprising:

The terminal obtains a target precoding matrix based on a reference signal sent by the access network device through multiple antenna port groups;

Determining, by the terminal, the target indication information corresponding to the target precoding matrix according to the codebook, where the codebook includes a correspondence between a precoding matrix and the indication information, where the precoding matrix is a product of the first matrix and the second matrix, The first matrix is configured to select a first antenna port group from the plurality of antenna port groups or to characterize a difference parameter between the multiple antenna port groups, where the second matrix includes the multiple a sub-precoding matrix corresponding to some or all of the antenna port groups of the antenna port group;

The terminal sends the target indication information to an access network device.
The method according to claim 1, wherein before the terminal obtains the target precoding matrix, the method further includes:

The terminal receives the first configuration information from the access network device, where the first configuration information is used to indicate the codebook used by the terminal.
The method according to claim 1 or 2, wherein before the terminal obtains the target precoding matrix, the method further includes:

The terminal receives second configuration information from the access network device, where the second configuration information is used to configure parameters of the codebook.
The method of claim 3, wherein the second configuration information comprises a number of antenna port groups and/or a number of antenna ports in the antenna port group.
The method according to any one of claims 1 to 4, wherein the target indication information comprises a first precoding matrix indicating PMI and a second PMI, the first PMI being used to indicate the first matrix, The second PMI is used to indicate the second matrix.
The method according to claim 5, wherein the second matrix comprises a sub-precoding matrix corresponding to S antenna port groups of the plurality of antenna port groups, and the first matrix is used to represent the multiple a phase difference between the wireless channels corresponding to the antenna port groups; the first matrix is
The second matrix is
The target precoding matrix is W, and

Wherein said
Indicates the length is
a matrix, the k being equal to any one of j 1 , j 2 ... j N , the S being less than or equal to N, the N being the number of antenna port groups of the access network device, M is the number of antenna ports in the antenna port group,
a phase difference between two polarization directions of the antenna port group,
Equal to any one of {+1, -1, +j, -j},
a phase difference between the radio channels corresponding to the S antenna port groups, l=1, . . . , X-1, where X is equal to the number of quantization bits of θ, and the l is determined according to the first PMI, the j 1 , j 2 ... j N are determined according to the second PMI.
The method according to claim 5, wherein the second matrix comprises a sub-precoding matrix corresponding to each of the plurality of antenna port groups of the access network device, the a matrix for selecting a first antenna port group from the plurality of antenna port groups; the first matrix is
The second matrix is
The target precoding matrix is W, and
Wherein said
Indicates the length is
a matrix, the k being equal to any one of j 1 , j 2 ... j N , one element in the first matrix is 1, and the other elements are all 0, and the N is the access network The number of antenna port groups on the device, where M is the number of antenna ports in each antenna port group,
a phase difference between two polarized antennas on the access network device,
Equal to any one of {+1, -1, +j, -j}, the {a 1 , a 2 ... a N } being determined according to the first PMI, the j 1 , j 2 . ..j N is determined according to the second PMI.
A method for transmitting information, which is used for an access network device, wherein the access network device sends information through multiple antenna port groups, and the method includes:

The access network device receives channel state information reported by the terminal, where the channel state information includes target indication information;

The access network device determines, according to the codebook, a target precoding matrix corresponding to the target indication information, where the codebook includes a correspondence between the indication information and a precoding matrix, where the precoding matrix is a first matrix and a second matrix. a first matrix for selecting a first antenna port group from the plurality of antenna port groups or for characterizing a difference parameter between the plurality of antenna port groups, the second matrix comprising the A sub-precoding matrix corresponding to some or all of the antenna port groups of the plurality of antenna port groups.
The method of claim 8 wherein said method comprises:

The access network device sends the first configuration information to the terminal, where the first configuration information is used to configure the terminal to use the codebook.
The method according to claim 8 or 9, wherein before the access network device receives the channel state information reported by the terminal, the method further includes:

The access network device sends second configuration information to the terminal, where the second configuration information is used to configure parameters of the codebook.
The method of claim 10, wherein the second configuration information comprises a number of antenna port groups and/or a number of antenna ports in the antenna port group.
The method according to any one of claims 8 to 11, wherein the target indication information comprises a first precoding matrix indicating PMI and a second PMI, wherein the first PMI is used to indicate the first matrix, the first Two PMIs are used to indicate the second matrix.
The method according to claim 12, wherein the second matrix comprises a sub-precoding matrix corresponding to S antenna port groups of the plurality of antenna port groups, and the first matrix is used to represent the multiple a phase difference between the wireless channels corresponding to the antenna port groups; the first matrix is
The second matrix is
The precoding matrix is W, and
Wherein said
Indicates the length is
a matrix, the k is equal to any one of j 1 , j 2 ... j N , the S is less than or equal to N, and the N is the number of antenna port groups on the access network device, the M For the number of antenna ports in each antenna port group,
a phase difference between two polarized antennas on the access network device,
Equal to any one of {+1, -1, +j, -j},
For each antenna port of the S antenna port groups, group the phase difference between the corresponding wireless channels, l=1, . . . , X-1, where X is equal to the number of quantization bits of θ, and the 1 is according to the first PMI It is determined that the j 1 , j 2 ... j N are determined according to the second PMI.
The method according to claim 12, wherein the second matrix comprises a sub-precoding matrix corresponding to each of the plurality of antenna port groups of the access network device, a matrix for selecting a first antenna port group from the plurality of antenna port groups; the first matrix is
The second matrix is
Target precoding matrix
Wherein
Indicates the length is
a matrix, the k being equal to any one of j 1 , j 2 ... j N , one element in the first matrix is 1, and the other elements are all 0, and the N is the access network The number of antenna port groups on the device, where M is the number of antenna ports in each antenna port group,
a phase difference between two polarized antennas on the access network device,
Equal to any one of {+1, -1, +j, -j}, the {a 1 , a 2 ... a N } being determined according to the first PMI, the j 1 , j 2 . ..j N is determined according to the second PMI.
A terminal, comprising: a processor and a transmitter;

The processor is configured to obtain a target precoding matrix based on a reference signal sent by the access network device by using multiple antenna port groups, and determine target indication information corresponding to the target precoding matrix according to the codebook, where the codebook includes Corresponding relationship between the precoding matrix and the indication information, wherein the precoding matrix is a product of the first matrix and the second matrix, wherein the first matrix is used to select the first antenna port group from the plurality of antenna port groups Or for characterizing a difference parameter between the plurality of antenna port groups, the second matrix comprising a sub-precoding matrix corresponding to a part or all of the antenna port groups of the plurality of antenna port groups;

The transmitter is configured to send the target indication information to an access network device.
The terminal according to claim 15, wherein the terminal further comprises: a receiver;

The receiver is configured to receive first configuration information from the access network device before the processor obtains a target precoding matrix, where the first configuration information is used to indicate the codebook used by the terminal .
The terminal according to claim 16, wherein the receiver is further configured to receive second configuration information, the second, from the access network device before the processor acquires a target precoding matrix. The configuration information is used to configure parameters of the codebook.
The terminal according to claim 17, wherein the second configuration information comprises the number of antenna port groups and/or the number of antenna ports in the antenna port group.
The terminal according to any one of claims 15 to 18, wherein the indication information comprises a first precoding matrix indicating PMI and a second PMI, wherein the first PMI is used to indicate the first matrix, The second PMI is used to indicate the second matrix.
The terminal according to claim 19, wherein the second matrix comprises a sub-precoding matrix corresponding to S antenna port groups of the plurality of antenna port groups, and the first matrix is used to represent the multiple a phase difference between the wireless channels corresponding to the antenna port groups; the first matrix is
The second matrix is
The precoding matrix is W, and

Wherein said
Indicates the length is
a matrix, the k being equal to any one of j 1 , j 2 ... j N , the S being less than or equal to N, the N being the number of antenna port groups of the access network device, M is the number of antenna ports in the antenna port group,
a phase difference between two polarization directions of the antenna port group,
Equal to any one of {+1, -1, +j, -j},
a phase difference between the radio channels corresponding to the S antenna port groups, l=1, . . . , X-1, where X is equal to the number of quantization bits of θ, and the l is determined according to the first PMI, the j 1 , j 2 ... j N are determined according to the second PMI.
The terminal according to claim 19, wherein the second matrix comprises a sub-precoding matrix corresponding to each of the plurality of antenna port groups of the access network device, the a matrix for selecting a first antenna port group from the plurality of antenna port groups; the first matrix is
The second matrix is
The precoding matrix is W, and
Wherein said
Indicates the length is
a matrix, the k being equal to any one of j 1 , j 2 ... j N , one element in the first matrix is 1, and the other elements are all 0, and the N is the access network The number of antenna port groups on the device, where M is the number of antenna ports in each antenna port group,
a phase difference between two polarized antennas on the access network device,
Equal to any one of {+1, -1, +j, -j}, the {a 1 , a 2 ... a N } being determined according to the first PMI, the j 1 , j 2 . ..j N is determined according to the second PMI.
An access network device, wherein the access network device sends information through multiple antenna port groups, where the access network device includes: a receiver and a processor;

The receiver is configured to receive channel state information reported by the terminal, where the channel state information includes target indication information;

The processor is configured to determine, according to the codebook, a target precoding matrix corresponding to the target indication information, where the codebook includes a correspondence between the indication information and a precoding matrix, where the precoding matrix is a first matrix and a second a product of a matrix for selecting a first antenna port group from the plurality of antenna port groups or for characterizing a difference parameter between the plurality of antenna port groups, the second matrix comprising A sub-precoding matrix corresponding to some or all of the antenna port groups of the plurality of antenna port groups.
The access network device according to claim 22, wherein the access network device further comprises a transmitter;

The transmitter is configured to send first configuration information to the terminal, where the first configuration information is used to configure the terminal to use the codebook.
The access network device according to claim 23, wherein the transmitter is further configured to send second configuration information to the terminal, where the second configuration information is used to configure parameters of the codebook.
The access network device according to claim 24, wherein the second configuration information comprises a number of antenna port groups and/or a number of antenna ports in the antenna port group.
The access network device according to any one of claims 22-25, wherein the indication information comprises a first precoding matrix indicating PMI and a second PMI, wherein the first PMI is used to indicate the first a matrix, the second PMI being used to indicate the second matrix.
The access network device according to claim 26, wherein the second matrix comprises a sub-precoding matrix corresponding to S antenna port groups of the plurality of antenna port groups, and the first matrix is used for characterization a phase difference between the wireless channels corresponding to the plurality of antenna port groups; the first matrix is
The second matrix is
The target precoding matrix is W, and
Wherein said
Indicates the length is
a matrix, the k is equal to any one of j 1 , j 2 ... j N , the S is less than or equal to N, and the N is the number of antenna port groups on the access network device, the M For the number of antenna ports in each antenna port group,
a phase difference between two polarized antennas on the access network device,
Equal to any one of {+1, -1, +j, -j},
For each antenna port of the S antenna port groups, group the phase difference between the corresponding wireless channels, l=1, . . . , X-1, where X is equal to the number of quantization bits of θ, and the 1 is according to the first PMI It is determined that the j 1 , j 2 ... j N are determined according to the second PMI.
The access network device according to claim 26, wherein the second matrix comprises a sub-precoding matrix corresponding to each of the plurality of antenna port groups of the access network device, The matrix is configured to select a first antenna port group from the plurality of antenna port groups; the first matrix is
The second matrix is
The target precoding matrix is W, and
Wherein said
Indicates the length is
a matrix, the k being equal to any one of j 1 , j 2 ... j N , one element in the first matrix is 1, and the other elements are all 0, and the N is the access network The number of antenna port groups on the device, where M is the number of antenna ports in each antenna port group,
a phase difference between two polarized antennas on the access network device,
Equal to any one of {+1, -1, +j, -j}, the {a 1 , a 2 ... a N } being determined according to the first PMI, the j 1 , j 2 . ..j N is determined according to the second PMI.