CN108462519A

CN108462519A - A kind of channel state information feedback method, UE and access network entity

Info

Publication number: CN108462519A
Application number: CN201611146667.8A
Authority: CN
Inventors: 李辉; 高秋彬; 陈润华; 塔玛拉卡·拉盖施; 黄秋萍
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2016-12-13
Filing date: 2016-12-13
Publication date: 2018-08-28

Abstract

A kind of channel state information feedback method of present invention offer, UE and access network entity, the method includes：UE indicates parametric configuration pre-coding matrix set according to wave beam；The UE determines the index of target pre-coding matrix and the target pre-coding matrix from the pre-coding matrix set；The UE sends the index of the target pre-coding matrix to access network entity.In this way, the beam vectors group that the channel state information feedback method of the present invention indicates to use in parameter code book by wave beam, can be adjusted flexibly codebook structure, lifting system performance according to different antenna ports or different aerial array forms.

Description

A kind of channel state information feedback method, UE and access network entity

Technical field

The present invention relates to field of communication technology, more particularly to a kind of channel state information feedback method, UE (User Equipment, user terminal) and access network entity.

Background technology

In the multiaerial system based on linear predictive coding, receiver is according to channel information from the precoding pre-defined Suitable pre-coding matrix is selected in set of matrices, by index of the pre-coding matrix chosen in the pre-coding matrix set Transmitter is fed back to, the pre-coding matrix collection is collectively referred to as code book.Transmitter determines corresponding prelist according to the index received Code matrix is used in combination it to carry out pretreatment appropriate to sending signal, to improve the validity and reliability of information transmission.

In LTE (Long Term Evolution, long term evolution) system of Rel-13 versions, multi-antenna port code book It is all made of two-stage codebook structure, each code word of first order code book is corresponding with each basic wave beam grouping.According to access network entity The codebook parameter config of configuration, each first order code word are right from its comprising 1 or 4 beam vectors, this beam vectors It selects 1 therein in the basic wave beam grouping answered in the fixed pattern that is defined by config or 4 wave beams constitutes. However, the wave beam constituted mode flexibility of fixed style is poor, it cannot be according to different antenna ports or different antenna arrays Row form is adjusted flexibly, and is easy the performance of influence system.

Invention content

The purpose of the present invention is to provide a kind of channel state information feedback method, UE and access network entities, existing to solve There is the wave beam constituted mode flexibility for fixing style in technology poor, it cannot be according to different antenna ports or different antennas The problem of array form is adjusted flexibly, the performance of easy influence system.

In order to achieve the above object, the embodiment of the present invention provides a kind of channel state information feedback method, the method packet It includes：

User terminal UE indicates parametric configuration pre-coding matrix set according to wave beam；

The UE determines target pre-coding matrix and the target pre-coding matrix from the pre-coding matrix set Index；

The UE sends the index of the target pre-coding matrix to access network entity.

Optionally, the method further includes：

The UE receives the wave beam instruction parameter that the access network entity is sent.

Optionally, the method further includes：

The UE determines the wave beam instruction parameter；

The UE sends the index of the target pre-coding matrix to access network entity, including：

The UE sends the index of the wave beam instruction parameter and the target pre-coding matrix to access network entity.

Optionally, the UE determines the wave beam instruction parameter, including：

The UE determines that the wave beam indicates parameter according to the channel status of acquisition.

Optionally, the UE indicates parametric configuration pre-coding matrix set according to wave beam, including：

The UE indicates parametric configuration the first pre-coding matrix set, and the second pre-coding matrix collection of construction according to wave beam It closes；

The UE determines target pre-coding matrix and the target pre-coding matrix from the pre-coding matrix set Index, including：

The UE determines first object pre-coding matrix and first mesh from the first pre-coding matrix set The index of pre-coding matrix is marked, and determines the second target pre-coding matrix and described from the second pre-coding matrix set The index of second target pre-coding matrix；

The UE to access network entity send the first object pre-coding matrix index and second target it is pre- The index of encoder matrix.

Optionally, the wave beam instruction parameter includes multiple bits, and different bits corresponds to different beam vectors, The preset state of each bit indicates that the corresponding beam vectors of the bit are selected；

The UE indicates parametric configuration the first pre-coding matrix set according to wave beam, including：

The UE constructions include first of the corresponding beam vectors of bit of preset state in the wave beam instruction parameter Pre-coding matrix set.

Optionally, the wave beam instruction parameter includes one or more beam vectors group #, wherein different beam vectors Group # corresponds to different beam vectors groups；

The UE constructions include the first precoding of the corresponding beam vectors group of one or more described beam vectors group # Set.

The embodiment of the present invention also provides a kind of channel state information feedback method, the method includes：

Access network entity receives the index for the target pre-coding matrix that user terminal UE is sent；

The access network entity indicates parametric configuration pre-coding matrix set according to wave beam；

The access network entity is determined according to the index of the target pre-coding matrix from the pre-coding matrix set Target pre-coding matrix.

Optionally, the method further includes：

The access network entity determines the wave beam instruction parameter, and sends the wave beam to the UE and indicate parameter.

Optionally, the access network entity determines the wave beam instruction parameter, including：

The access network entity determines that the wave beam indicates parameter according to the channel status of acquisition.

Optionally, the access network entity receives the index for the target pre-coding matrix that the UE is sent, including：

The access network entity receives the index of wave beam instruction parameter and target pre-coding matrix that the UE is sent.

Optionally, the index of the target pre-coding matrix includes the index and the second mesh of first object pre-coding matrix Mark the index of pre-coding matrix；

The access network entity indicates that parameter determines pre-coding matrix set according to wave beam, including：

The access network entity indicates parametric configuration the first pre-coding matrix set, and the second precoding of construction according to wave beam Set of matrices；

The access network entity is determined according to the index of the target pre-coding matrix from the pre-coding matrix set Target pre-coding matrix, including：

The access network entity is according to the index of the first object pre-coding matrix from the first pre-coding matrix collection Determine first object pre-coding matrix in conjunction, and according to the index of the second target pre-coding matrix from second precoding The second target pre-coding matrix is determined in set of matrices.

The access network entity indicates the first pre-coding matrix of parametric configuration according to wave beam, including：

Access network entity construction include the wave beam indicate the corresponding wave beam of bit of preset state in parameter to First pre-coding matrix set of amount.

The access network entity indicates parametric configuration the first pre-coding matrix set according to wave beam, including：

Access network entity construction includes the of the corresponding beam vectors group of one or more described beam vectors group # One pre-coding matrix set.

The embodiment of the present invention also provides a kind of user terminal UE, and the UE includes：

Constructing module, for indicating parametric configuration pre-coding matrix set according to wave beam；

First determining module, for determining target pre-coding matrix and the target from the pre-coding matrix set The index of pre-coding matrix；

Sending module, the index for sending the target pre-coding matrix to access network entity.

Optionally, the UE further includes：

Receiving module indicates parameter for receiving the wave beam that the access network entity is sent.

Optionally, the UE further includes：

Second determining module, for determining that the wave beam indicates parameter；

The sending module indicates that parameter and the target prelist for sending the wave beam to the access network entity The index of code matrix.

Optionally, second determining module,

For determining that the wave beam indicates parameter according to the channel status of acquisition.

Optionally, the constructing module,

For indicating parametric configuration the first pre-coding matrix set, and the second pre-coding matrix collection of construction according to the wave beam It closes；

First determining module, for determining first object pre-coding matrix from the first pre-coding matrix set And the index of the first object pre-coding matrix, and determine that the second target prelists from the second pre-coding matrix set The index of code matrix and the second target pre-coding matrix；

The sending module, index for sending from the first object pre-coding matrix to the access network entity and The index of the second target pre-coding matrix.

The constructing module includes the corresponding wave beam of bit that the wave beam indicates preset state in parameter for construct First pre-coding matrix set of vector.

The constructing module, for constructing including the corresponding beam vectors group of one or more described beam vectors group # First precoding set.

The embodiment of the present invention also provides a kind of access network entity, and the access network entity includes：

Receiving module, the index for receiving the target pre-coding matrix that user terminal UE is sent；

First determining module, for true from the pre-coding matrix set according to the index of the target pre-coding matrix Set the goal pre-coding matrix.

Optionally, the access network entity further includes：

Second determining module for determining that the wave beam indicates parameter, and sends the wave beam to the UE and indicates parameter.

Optionally, second determining module,

Optionally, the receiving module,

Index for receiving wave beam instruction parameter and target pre-coding matrix that the UE is sent.

The constructing module, for indicating parametric configuration the first pre-coding matrix set, and construction the according to the wave beam Two pre-coding matrix set；

First determining module, for according to the index of the first object pre-coding matrix from first precoding Determine first object and encoder matrix in set of matrices, and according to the index of the second target pre-coding matrix from described second The second target pre-coding matrix is determined in pre-coding matrix set.

The constructing module, for constructing including the corresponding beam vectors group of one or more described beam vectors group # First pre-coding matrix set.

The above-mentioned technical proposal of the present invention at least has the advantages that：

The embodiment of the present invention, UE indicate parametric configuration pre-coding matrix set according to wave beam；The UE is from the precoding The index of target pre-coding matrix and the target pre-coding matrix is determined in set of matrices；The UE is sent out to access network entity Send the index of the target pre-coding matrix.In this way, the channel state information feedback method of the present invention indicates parameter by wave beam The beam vectors group used in code book can flexibly be adjusted according to different antenna ports or different aerial array forms Whole codebook structure, lifting system performance.

Description of the drawings

In order to illustrate the technical solution of the embodiments of the present invention more clearly, needed in being described below to the embodiment of the present invention Attached drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, For those of ordinary skill in the art, without having to pay creative labor, it can also obtain according to these attached drawings Obtain other attached drawings.

Fig. 1 is 12 antenna port two-dimensional representations in the LTE system of Rel-13 versions provided in an embodiment of the present invention；

Fig. 2 is 16 antenna port two-dimensional representations in the LTE system of Rel-13 versions provided in an embodiment of the present invention；

Fig. 3, which is the code book of 12,16 antenna ports in the LTE system of Rel-13 versions provided in an embodiment of the present invention, to be made Two dimensional beam schematic diagram；

Fig. 4 is the selected difference of difference according to config in one provided in an embodiment of the present invention basic wave beam grouping The wave beam schematic diagram of pattern；

Fig. 5 is a kind of flow diagram of channel state information feedback method provided in an embodiment of the present invention；

Fig. 6 is a kind of schematic diagram of two dimensional beam vector set provided in an embodiment of the present invention；

Fig. 7 is the wave beam number schematic diagram in a kind of basic wave beam grouping provided in an embodiment of the present invention；

Fig. 8 is a kind of the first pre-coding matrix set signal constructed by beam vectors group provided in an embodiment of the present invention Figure；

Fig. 9 is a kind of grouping schematic diagram of two-dimensional antenna port provided in an embodiment of the present invention；

Figure 10 is the flow diagram of another channel state information feedback method provided in an embodiment of the present invention；

Figure 11 is the structural schematic diagram of UE provided in an embodiment of the present invention a kind of；

Figure 12 is the structural schematic diagram of another kind UE provided in an embodiment of the present invention；

Figure 13 is the structural schematic diagram of another kind UE provided in an embodiment of the present invention；

Figure 14 is a kind of structural schematic diagram of access network entity provided in an embodiment of the present invention；

Figure 15 is the structural schematic diagram of another access network entity provided in an embodiment of the present invention；

Figure 16 is the structural schematic diagram of another kind UE provided in an embodiment of the present invention；

Figure 17 is the structural schematic diagram of another access network entity provided in an embodiment of the present invention.

Specific implementation mode

To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool Body embodiment is described in detail.

In the LTE system of Rel-10 versions, two-stage codebook is introduced for 8 antenna of access network entity end.In Rel-12 In the LTE system of version, it is two-stage codebook also to enhance for 4 antenna of access network entity end.In the LTE system of Rel-13 versions In, access network entity end uses FD MIMO (Full-Dimensional MIMO, full dimension multiple-input and multiple-output) aerial array, Antenna port increases to 16, and can be one-dimensional or two-dimensional array.As shown in Figures 1 and 2, Fig. 1, Fig. 2 are Rel-13 editions Two-dimensional antenna port schematic diagram in this LTE system, wherein Fig. 1 is the schematic diagram of 12 antenna ports, and Fig. 2 is 16 antenna ends Mouth schematic diagram.

Configuration based on Fig. 1 and aerial array shown in Fig. 2, code book are designed in original 4 antenna and 8 antenna ports Two-dimensional the two poles of the earth code book is extended on the basis of two-stage codebook.It is, of course, understood that two-dimensional the two poles of the earth code book and not only limiting In applied to Fig. 1 and the aerial array of 12 antenna port shown in Fig. 2 and 16 antenna ports, it can be extended to more Antenna port, the embodiment of the present invention are only illustrated by taking 12 antenna ports and 16 antenna ports as an example, but not as Limit.

Be referring to Fig. 3, Fig. 3 Rel-13 versions provided in an embodiment of the present invention LTE system in 12,16 antenna ports Two dimensional beam schematic diagram used in code book, as shown in figure 3, giving 12,16 antennas in the LTE systems of Rel-13 versions in figure Two dimensional beam used in the code book of port, wherein each grid indicates that a two dimensional beam, the first dimension have N₁A wave beam, Second dimension has N₂A wave beam.

Above-mentioned two dimensional beam is grouped, multiple basic wave beam groupings can be obtained.Each basic wave beam grouping is by the 4 wave beams of dimension, the second wave beam of dimension 2 are constituted, basic wave beam as shown in Figure 3 grouping 301 or basic wave beam grouping 302.It should be noted that basic wave beam grouping shown in Fig. 3 is merely illustrative, it is not limited thereto.The basic wave There can be wave beam overlapping in part between beam grouping.

In the LTE system of Rel-13 versions, 12,16 antenna port code books use two-stage codebook structure, first order code book Each code word it is corresponding with each basic wave beam grouping, the codebook parameter config configured according to access network entity, each first Grade code word includes 1 or 4 beam vectors, this beam vectors is defined by config from its corresponding basic wave beam grouping Fixed pattern select 1 therein or 4 beam vectors.It is provided in an embodiment of the present invention one refering to Fig. 4, Fig. 4 According to the wave beam schematic diagram of the selected different patterns of difference of config in a basic wave beam grouping, as shown in figure 4, being given in figure The wave beam of the selected different patterns of difference according to config is gone out, dash area indicates selected wave beam in figure.

Based on above-mentioned two-dimentional two-stage codebook structure, the present invention proposes a kind of channel state information feedback method, is applied to UE And access network entity, the channel state information feedback method of the present invention is carried out specifically below with reference to specific embodiment It is bright.UE of the present invention can be such as mobile phone, computer, household appliance, tablet computer (Tablet Personal Computer), laptop computer (Laptop Computer), personal digital assistant (personal digital Assistant, abbreviation PDA), mobile Internet access device (Mobile Internet Device, MID) or wearable device Terminal devices such as (Wearable Device).Access network entity of the present invention can be the access network equipment such as base station. It should be noted that not limiting the concrete type of the UE and the access network entity in embodiments of the present invention.

It is a kind of channel information feedback method provided in an embodiment of the present invention referring to Fig. 5, Fig. 5, as shown in figure 5, the side Method includes the following steps：

Step 501, UE indicate parametric configuration pre-coding matrix set according to wave beam.

Step 502, the UE determine that target pre-coding matrix and the target are pre- from the pre-coding matrix set The index of encoder matrix.

Step 503, the UE send the index of the target precoding to access network entity.

In the embodiment, the UE indicates that parametric configuration pre-coding matrix set, the wave beam indicate parameter according to wave beam It can be determined by the access network entity, then be sent from the access network entity to the UE, the access network entity Wave beam instruction parameter can be sent to the UE by high-level signaling, it can also be by dynamic control signaling by the wave Beam instruction parameter is sent to the UE.The UE is after receiving the wave beam instruction parameter that the access network entity is sent according to institute State the wave beam instruction parametric configuration pre-coding matrix set received.The wave beam instruction parameter can also be by the UE itself Determining, the UE indicates parametric configuration pre-coding matrix collection after determining the wave beam instruction parameter according to the wave beam It closes.

In the embodiment, the pre-coding matrix set includes the first pre-coding matrix set and the second pre-coding matrix Set.The UE indicates parametric configuration the first pre-coding matrix set, and the second pre-coding matrix collection of construction according to the wave beam It closes.In embodiments of the present invention, the channel state information feedback method pre-defines pre- in the first pre-coding matrix set Encoder matrix is made of K beam vectors group, and wherein K is the positive integer more than or equal to 1.The wave beam indicates that parameter can be L group wave beams indicate that parameter, wherein L are the positive integer more than or equal to 1, and less than or equal to K, and each group of wave beam indicates parameter It is used to indicate a beam vectors group being made of N number of beam vectors, wherein N is the positive integer more than or equal to 1.

The UE indicates the first pre-coding matrix that parametric configuration is made of K beam vectors group according to the L groups wave beam Gather (i.e. first order code book), the UE also constructs the second pre-coding matrix set (i.e. second level code book), and described second prelists Pre-coding matrix in code set of matrices can be that one or more beam vectors are selected from each beam vectors group, then right The matrix obtained into horizontal phasing control between the beam vectors selected.The UE constructs the second pre-coding matrix set category In prior art scope, details are not described herein, it is to be understood that the UE can construct the first pre-coding matrix collection Second pre-coding matrix set described in the front construction of conjunction can also construct institute after constructing the first pre-coding matrix set The second pre-coding matrix set is stated, described second can also be constructed while constructing the first pre-coding matrix set and prelisted Code set of matrices, this is not limited by the present invention.

The UE further determines mesh after determining the pre-coding matrix set from the pre-coding matrix set The index of the target pre-coding matrix, is then sent to by the index for marking pre-coding matrix and the target pre-coding matrix The access network entity.In embodiments of the present invention, when wave beam instruction parameter is determined by the access network entity It waits, the UE only sends the index of the target pre-coding matrix to the access network entity, and does not have to the access net Entity sends the wave beam and indicates parameter.When wave beam instruction parameter is determined by the UE, the UE is also by institute It states wave beam instruction parameter and is sent to the access network entity, the wave beam instruction parameter can be with the target pre-coding matrix Index can carry in same message, can also respectively carry in different message, the UE can be described in transmission Wave beam indicates that the sequence of the index of parameter and the target pre-coding matrix can be any sequence, and the embodiment of the present invention is to this It does not limit.

The access network entity is after the index for receiving the target pre-coding matrix according to the target precoding The index of matrix determines target pre-coding matrix, is then encoded to signal using the target pre-coding matrix.Specifically, The access network entity indicates parametric configuration pre-coding matrix set according to the wave beam first, is then prelisted according to the target The index of code matrix determines target pre-coding matrix from the pre-coding matrix set.

Optionally, the method further includes：

In the embodiment, the wave beam instruction parameter is determined that the access network entity exists by the access network entity Determine that the rear of wave beam instruction parameter sends the wave beam to the UE and indicate parameter, the access network entity can pass through to The UE sends high-level signaling and realizes that sending the wave beam to the UE indicates parameter, can also be by sending dynamic to the UE Control signaling realizes that sending the wave beam to the UE indicates parameter.That is, the wave beam instruction parameter can carry In the high-level signaling that the access network entity is sent to the UE, it can also carry and be sent to the UE in the access network entity Dynamic control signaling in.

The access network entity can according to send channel state (such as antenna for base station configure, uplink channel estimation knot Fruit etc.) determine the wave beam instruction parameter, the wave beam instruction can also be determined according to other states (such as type of service etc.) Parameter, it is not limited in the embodiment of the present invention.

Optionally, the method further includes：

The UE determines the wave beam instruction parameter；

In the embodiment, the wave beam instruction parameter is determined that the UE can be according to the state for receiving channel by the UE (such as antenna for base station configuration, down channel estimated result etc.) determines the wave beam instruction parameter, can also be according to data service Type etc. determines that the wave beam indicates that parameter, the present invention do not limit herein.

Optionally, the UE determines the wave beam instruction parameter, including：

In the embodiment, the UE determines that the wave beam indicates parameter, specifically, the UE according to the channel status of acquisition The channel status for receiving channel can be first obtained, then determines that the wave beam indicates parameter according to the channel status of acquisition.It is described Channel status may include the channel parameters such as channel estimation results, signal strength, signal-to-noise ratio.

In the embodiment, the target pre-coding matrix includes first object pre-coding matrix and the second precoding square Battle array.The UE after determining the first pre-coding matrix set and the second pre-coding matrix set, the UE from The index of first object pre-coding matrix and the first object pre-coding matrix is determined in the first pre-coding matrix set And the second target pre-coding matrix and the second target pre-coding matrix are determined from the second pre-coding matrix set Index.The index and the second target pre-coding matrix that determine the first object pre-coding matrix index it Afterwards, the UE sends the index of the first object pre-coding matrix to the access network entity and second target prelists The index of code matrix.

The access network entity receives the index of the first object pre-coding matrix and second target prelists According to the index of the first object pre-coding matrix and the second target pre-coding matrix after the index of code matrix Index determines first object pre-coding matrix and the second pre-coding matrix.Specifically, the access network entity is first according to institute Wave beam instruction parametric configuration the first pre-coding matrix set, and the second pre-coding matrix set of construction are stated, then according to The index of first object pre-coding matrix determines first object pre-coding matrix from the first pre-coding matrix set, and The second target precoding is determined from the second pre-coding matrix set according to the index of the second target pre-coding matrix Matrix.Further, the access network entity is also by the first object pre-coding matrix and the second target precoding Matrix carries out preset matrix operation, finally obtains target pre-coding matrix, the access network entity prelists according to the target Code matrix carries out precoding to signal.The preset matrix operation can be the point multiplication operation of matrix, can also be matrix Multiplication cross operation (i.e. Kronecker products), can also be the combination of above-mentioned operation, does not limit herein.

In the embodiment, the wave beam instruction parameter includes multiple and different bits, and different bits corresponds to different The preset state of beam vectors, each bit indicates that the corresponding beam vectors of the bit are selected.For example, each bit State " 0 " and state " 1 " are may each comprise, the method can pre-define state " 1 " and indicate the corresponding wave beam of bit Vector is selected, and state " 0 " indicates that the corresponding beam vectors of bit are not selected.It is understood that the method State " 0 " can be pre-defined and indicate that the corresponding beam vectors of bit are selected, state " 1 " indicates the corresponding wave beam of bit Vector is without selected, and the following explanation of the embodiment of the present invention is corresponding selected with state " 1 ", and state " 0 " is corresponding without selected In for illustrate, but this is not limited.

The UE indicates that the state of each bit in parameter constructs the first pre-coding matrix collection according to the wave beam It closes, specifically, the UE determines the bit that preset state is in the wave beam instruction parameter, then determines described in pre- If the Vector Groups that the corresponding beam vectors of the bit of state are constituted construct the first pre-coding matrix set.

For example, it is assumed that 3D MIMO (three-dimensional large-scale antenna array) have two-dimensional antenna port, define N₁A first Beam vectors are tieed up, this beam vectors uses O₁DFT (Discrete Fourier Transform, the direct computation of DFT of times over-sampling Leaf transformation) vector generation, such as following formula (1)；Define N₂A second dimension beam vectors, this beam vectors use O₂Times over-sampling DFT vectors generate, as shown in following formula (2)：

Wherein, N_hIndicate the antenna port number of the first dimension, N_vIndicate the antenna port number of the second dimension.Two dimensional beam to Amount can be accumulated by the Kronecker of the first dimension beam vectors and the second dimension beam vectors and be generated, and be shown below：

For dual-polarized antenna array, antenna port of this beam vectors in a polarization direction, in this way at one N is constituted in polarization direction altogether₁·N₂=N_hO₁·N_vO₂A two dimensional beam vector.Fig. 6 gives this two dimensional beam vector set Schematic diagram, wherein each grid in Fig. 6 indicates a two dimensional beam vector.

Assuming that using beam vectors packet mode as shown in Figure 3, and according to the sequence of the second dimension after first the first dimension Carry out wave beam number, as shown in fig. 7, every group of wave beam instruction parameter can by bitmap (bitmap) Sequence composition, sequence Length is the wave beam number in the grouping of basic wave beam.Bit (bit) is that the position of " 0 " indicates the corresponding wave beam of the bit not Selected, bit is that the position of " 1 " indicates that the corresponding wave beam of the bit is selected.Such as basic wave beam shown in fig. 7 point Group, if wave beam instruction parameter be " 11110000 ", this 8 bit sequence indicate selected the number in Fig. 4 for 1,2,3 and 44 A wave beam constitutes a beam vectors group.

For dual-polarized antenna array, the first pre-coding matrix can be expressed as a block diagonal matrix, each piece of expression One polarization direction of aerial array, is expressed as following formula：

Wherein, X₀For the beam vectors group that N number of beam vectors in a polarization direction are constituted, X₁For another polarization side The beam vectors group that upward N number of beam vectors are constituted, first pre-coding matrix are made of K=2 beam vectors group.

According to the code book in the LTE system of Rel-13 versions, it can be assumed that two polarization directions using identical wave beam to Amount group, i.e. X₀=X₁, such access network entity or UE configuration L=1 group wave beams indicate parameter, this group of wave beam instruction parameter instruction N=4 wave beam is selected to constitute a beam vectors group from basic wave beam.

Assuming that first group of wave beam instruction parameter is " 11000011 ", the UE indicates parameter according to the wave beam, construction the One pre-coding matrix set, as shown in figure 8, the beam vectors group 801 and 802 in figure constitutes the first pre-coding matrix collection Two pre-coding matrixes in conjunction, it is to be understood that in embodiments of the present invention, the first pre-coding matrix set is also wrapped Other beam vectors groups are included, such as including the beam vectors group 801 is moved one or more Wave beam formings to different directions Beam vectors group.That is the corresponding index of wave beam Vector Groups 801 is (i in Fig. 8_1,1,i_1,2)=(0,0).By this beam vectors group The beam vectors group (802 in Fig. 8, it is assumed that s1=2) that s1 wave beam is constituted is moved to right, corresponding index is (i_1,1,i_1,2)= (1,0), moving to right s1 wave beam successively can obtain until index (i_1,1,i_1,2)=(N₁/ s1,0) corresponding beam vectors group.Class As, it is (i that the beam vectors group 801 in Fig. 8, which is moved up s2 wave beam to constitute the corresponding index of beam vectors group,_1,1,i_1,2)= (0,1), moving up s2 wave beam successively can obtain until (i_1,1,i_1,2)=(0, N₂/ s2) corresponding beam vectors group.

Based on the constituted mode of the first above pre-coding matrix set, manipulative indexing (i₁,1,i_1,2) the first precoding Matrix X in set of matrices₀It can be expressed as：

Wherein i_1,1=0,1 ..., N_hO₁/ 2-1, i_1,2=0,1 ..., N_vO₂/2-1。

The second pre-coding matrix set can directly use the W of 12,16 antenna ports in Rel-13 at this time₂Code book also may be used With to this W₂It is extended, indicates as follows by taking rank=2 as an example：

Wherein, α_iFor the phase adjustment factor, can selectWherein T is just more than or equal to 1 Integer；For a length be N column selection vector, be a unit vector, n-th_iA element is 1, remaining element is 0.

The determining corresponding index values of W1 and the corresponding index values of W2 are fed back to access network entity by the UE.It is described Access network entity generates total pre-coding matrix and is expressed as：

W=W₁·W₂

In another example, it is assumed that 3D mimo antenna arrays have two-dimensional antenna port, and carry out antenna to this two-dimensional antenna port Grouping.As shown in figure 9, in each polarization direction, two groups are divided into the antenna port of the second dimension.Define N₁A first dimension Beam vectors, this beam vectors use O₁The DFT vectors of times over-sampling generate, as shown in formula (3)；Define N₂A second dimension wave Shu Xiangliang, this beam vectors use O₂The DFT vectors of times over-sampling generate, as shown in formula (4).

Wherein, N_hIndicate the antenna port number of the first dimension, N_vIndicate antenna port number of second dimension after grouping. Two dimensional beam vector can be accumulated by the Kronecker of the first dimension beam vectors and the second dimension beam vectors and be generated, such as following formula institute Show：

Parameter is indicated using with middle mutually isostructural wave beam in the example above.

For dual-polarized antenna array, the first pre-coding matrix can be expressed as a block diagonal matrix, each piece of expression One antenna grouping, is expressed as

Wherein, X₀The beam vectors group being made of N number of beam vectors for one, X₁For another in same polarization direction The beam vectors group of antenna grouping being made of N number of beam vectors.Similar, X₂And X₃Two in another corresponding polarization direction The beam vectors group of a antenna grouping, first pre-coding matrix are made of K=4 beam vectors group.

Assuming that 4 antenna groupings use identical beam vectors group, i.e. X₀=X₁=X₂=X₃.The access net described in this way Entity or UE configuration L=1 group wave beams indicate that parameter, this group of wave beam instruction parameter instruction are selected from the grouping of basic wave beam N=4 wave beam constitutes a beam vectors group.Assuming that first group of wave beam instruction parameter is " 11000011 ".

Terminal receives the wave beam instruction parameter of the access network entity configuration, constitutes W1.Manipulative indexing (i_1,1,i_1,2) W₁ In matrix X₀It can be expressed as：

Wherein i_1,1=0,1 ..., N_hO₁/ 2-1, i_1,2=0,1 ..., N_vO₂/2-1。

The second pre-coding matrix set needs the W to 12,16 antenna ports in Rel-13 at this time₂Code book is extended, with It is indicated for rank=2 as follows：

The UE is by determining W₁Corresponding index value and W₂Corresponding index value feeds back to the access network entity, institute It states access network entity and generates total pre-coding matrix and be expressed as：

W=W₁·W₂

In the embodiment, the method can in advance be numbered the feasible beam vectors group of M kinds, wherein different The corresponding different beam vectors group of number, the wave beam instruction parameter can be by a log₂The numerical value p of M-bit is indicated, each A numerical value indicates that the number of a beam vectors group, the UE indicate that parameter determines one or more wave beams according to the wave beam first Vector Groups, then construction includes the first pre-coding matrix of one or more beam vectors groups.

For example, it is assumed that using the basic wave beam grouping in Fig. 3.N number of wave beam is selected to constitute from the grouping of basic wave beam Vector Groups, there are the feasible beam vectors groups of M kinds to be expressed as m=0,1 ..., M- to this M kind beam vectors group number consecutively 1.Such as m=0, be Fig. 4 in the corresponding beam vectors groups of config2, m=1 correspond to the corresponding wave beams of config3 in Fig. 4 to Amount group, m=2 correspond to the corresponding beam vectors groups of config4 in Fig. 4, and so on.

Every group of wave beam instruction parameter can be by a log₂The numerical value p of M-bit indicates, each numerical value indicate a wave beam to The number of amount group.For dual-polarized antenna array, the first pre-coding matrix can be expressed as a block diagonal matrix, each piece of table Show a polarization direction of aerial array.It is expressed as：

Wherein, X₀For the beam vectors group that N number of beam vectors in a polarization direction are constituted, X₁For another polarization side The beam vectors group that upward N number of beam vectors are constituted.Such first pre-coding matrix is made of K=2 beam vectors group.

The access network entity or the UE determine that L=K=2 group wave beams indicate that parameter, this group of wave beam instruction parameter refer to Show that N=4 wave beam of selection constitutes a beam vectors group from the grouping of basic wave beam.Assuming that first group of wave beam instruction parameter is p1 =0, second group of wave beam instruction parameter is p2=2.

The UE indicates parameter according to this wave beam, generates the first pre-coding matrix, i.e., indicates parameter according to first group of wave beam P1=0 constitutes X₀It is as follows：

Parameter p2=2 is indicated according to first group of wave beam, constitutes X₁It is as follows：

Wherein i_1,1=0,1 ..., N_hO₁/ 2-1, i_1,2=0,1 ..., N_vO₂/2-1。

The UE is by determining W₁Corresponding index value and W₂Corresponding index value and L=2 group wave beams indicate parameter P1 and p2 feeds back to the access network entity.The access network entity generates W using the process similar with the UE₁, W₂And it obtains Total pre-coding matrix is expressed as：

W=W₁·W₂

It is the flow chart of another channel state information feedback method provided in an embodiment of the present invention referring to Figure 10, Figure 10, As shown in Figure 10, it the described method comprises the following steps：

Step 1001, access network entity receive the index for the target pre-coding matrix that UE is sent.

Step 1002, the access network entity indicate parametric configuration pre-coding matrix set according to wave beam.

Step 1003, the access network entity are according to the index of the target pre-coding matrix from the pre-coding matrix collection Target pre-coding matrix is determined in conjunction.

Optionally, the method further includes：

It should be noted that can be access network entity corresponding with embodiment shown in Fig. 5 side reality in the present embodiment Example is applied, the correlation step that above-mentioned access network entity executes may refer to related description in embodiment illustrated in fig. 5, no longer superfluous herein It states.The access network entity can be base station, not limit herein.

Referring to Figure 11, Figure 11 is a kind of structural schematic diagram of UE provided in an embodiment of the present invention, as shown in figure 11, the UE Including：

Constructing module 1101, for indicating parametric configuration pre-coding matrix set according to wave beam；

First determining module 1102, for determining target pre-coding matrix and described from the pre-coding matrix set The index of target pre-coding matrix；

Sending module 1103, the index for sending the target pre-coding matrix to access network entity.

Optionally, referring to Figure 12, Figure 12 is the structural schematic diagram of another kind UE provided in an embodiment of the present invention, such as Figure 12 institutes Show, the UE further includes：

Receiving module 1104 indicates parameter for receiving the wave beam that the access network entity is sent.

Optionally, referring to Figure 13, Figure 13 is the structural schematic diagram of another kind UE provided in an embodiment of the present invention, such as Figure 13 institutes Show, the UE further includes：

Second determining module 1105, for determining that the wave beam indicates parameter；

The sending module 1103, for sending the wave beam instruction parameter and the target to the access network entity The index of pre-coding matrix.

Optionally, second determining module 1105,

Optionally, the constructing module 1101,

First determining module 1102, for determining first object precoding from the first pre-coding matrix set The index of matrix and the first object pre-coding matrix, and the second target is determined from the second pre-coding matrix set The index of pre-coding matrix and the second target pre-coding matrix；

The sending module 1103, the index for sending the first object pre-coding matrix to the access network entity And the index of the second target pre-coding matrix.

The constructing module 1101 includes that the wave beam indicates that the bit of preset state in parameter is corresponding for constructing First pre-coding matrix set of beam vectors.

The constructing module 1101 includes one or more described corresponding beam vectors of beam vectors group # for constructing First precoding set of group.

It should be noted that above-mentioned UE can be the UE in Fig. 5-embodiments shown in Fig. 10, Fig. 5-figure in the present embodiment The arbitrary embodiment of UE can be realized by the above-mentioned UE in the present embodiment in 10 illustrated embodiments, and reach identical Advantageous effect, details are not described herein again.

Referring to Figure 14, Figure 14 is a kind of structural schematic diagram of access network entity provided in an embodiment of the present invention, such as Figure 14 institutes Show, the access network entity includes：

Receiving module 1401, the index for receiving the target pre-coding matrix that user terminal UE is sent；

Constructing module 1402, for indicating parametric configuration pre-coding matrix set according to wave beam；

First determining module 1403, for according to the index of the target pre-coding matrix from the pre-coding matrix set Middle determining target pre-coding matrix.

Optionally, optionally, referring to the structure that Figure 15, Figure 15 are another access network entity provided in an embodiment of the present invention Schematic diagram, as shown in figure 15, the access network entity further includes：

Second determining module 1404 for determining that the wave beam indicates parameter, and sends the wave beam instruction to the UE Parameter.

Optionally, second determining module 1404,

Optionally, the receiving module 1401,

The constructing module 1402, for indicating parametric configuration the first pre-coding matrix set and structure according to the wave beam Make the second pre-coding matrix set；

First determining module 1403, for pre- from described first according to the index of the first object pre-coding matrix Determine first object and encoder matrix in encoder matrix set, and according to the index of the second target pre-coding matrix from described The second target pre-coding matrix is determined in second pre-coding matrix set.

The constructing module 1402 includes that the wave beam indicates that the bit of preset state in parameter is corresponding for constructing First pre-coding matrix set of beam vectors.

The constructing module 1402 includes one or more described corresponding beam vectors of beam vectors group # for constructing First pre-coding matrix set of group.

It should be noted that above-mentioned access network entity can be connecing in Fig. 5-embodiments shown in Fig. 10 in the present embodiment Enter network entity, the arbitrary embodiment of access network entity can be by above-mentioned in the present embodiment in Fig. 5-embodiment illustrated in fig. 10 Access network entity is realized, and reaches identical advantageous effect, and details are not described herein again.

Referring to Figure 16, Figure 16 is a kind of structural schematic diagram of UE provided in an embodiment of the present invention, as shown in figure 16, the UE Including：Processor 1600, transceiver 1610, memory 1620, user interface 1630 and bus interface, wherein：

Processor 1600 executes following process for reading the program in memory 1620：

Parametric configuration pre-coding matrix set is indicated according to wave beam；

The index of target pre-coding matrix and the target pre-coding matrix is determined from the pre-coding matrix set；

The index of the target pre-coding matrix is sent to access network entity.

Wherein, transceiver 1610, for sending and receiving data under the control of processor 1600.

In figure 16, bus architecture may include the bus and bridge of any number of interconnection, specifically by 1600 generation of processor The various circuits for the memory that the one or more processors and memory 1620 of table represent link together.Bus architecture may be used also To link together various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like, these are all It is known in the art, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 1610 can To be multiple element, that is, includes transmitter and receiver, the list for being communicated over a transmission medium with various other devices is provided Member.For different user equipmenies, user interface 1630, which can also be, external the interface for needing equipment is inscribed, and connection is set Standby including but not limited to keypad, display, loud speaker, microphone, control stick etc..

Processor 1600 is responsible for bus architecture and common processing, and memory 1620 can store processor 1600 and exist Execute used data when operation.

Optionally, the processor 1600 is additionally operable to：

Receive the wave beam instruction parameter that the access network entity is sent.

Optionally, the processor 1600 is additionally operable to：

Determine the wave beam instruction parameter；

The processor 1600 sends the index of the target pre-coding matrix to access network entity, including：

The index of the wave beam instruction parameter and the target pre-coding matrix is sent to access network entity.

Optionally, the processor 1600 determines the wave beam instruction parameter, including：

Determine that the wave beam indicates parameter according to the channel status of acquisition.

Optionally, the processor 1600 indicates parametric configuration pre-coding matrix set according to wave beam, including：

Parametric configuration the first pre-coding matrix set, and the second pre-coding matrix set of construction are indicated according to wave beam；

The processor 1600 determines that target pre-coding matrix and the target are pre- from the pre-coding matrix set The index of encoder matrix, including：

Determine that first object pre-coding matrix and the first object prelist from the first pre-coding matrix set The index of code matrix, and the second target pre-coding matrix and second mesh are determined from the second pre-coding matrix set Mark the index of pre-coding matrix；

The index of the first object pre-coding matrix and the second target precoding square are sent to access network entity The index of battle array.

The processor 1600 indicates parametric configuration the first pre-coding matrix set according to wave beam, including：

Construction includes the first precoding of the corresponding beam vectors of bit of preset state in the wave beam instruction parameter Set of matrices.

Construction includes the first precoding set of the corresponding beam vectors group of one or more described beam vectors group #.

Referring to Figure 17, show that a kind of structural solid figure of access network entity, the access network entity include in figure：Processor 1700, transceiver 1710, memory 1720, user interface 1730 and bus interface, wherein：

Processor 1700 executes following process for reading the program in memory 1720：

Receive the index for the target pre-coding matrix that UE is sent；

Target pre-coding matrix is determined from the pre-coding matrix set according to the index of the target pre-coding matrix.

Wherein, in fig. 17, bus architecture may include the bus and bridge of any number of interconnection, specifically by processor The various circuits for the memory that 1700 one or more processors represented and memory 1720 represent link together.Total coil holder Structure can also link together various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like, this A little is all it is known in the art, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 1710 can be multiple element, that is, include transmitter and transceiver, provide for logical with various other devices over a transmission medium The unit of letter.Processor 1700 is responsible for bus architecture and common processing, and memory 1720 can store processor 1700 The used data when executing operation.

Processor 1700 is responsible for bus architecture and common processing, and memory 1720 can store processor 1700 and exist Execute used data when operation.

Optionally, the processor 1700 is additionally operable to：

It determines the wave beam instruction parameter, and sends the wave beam to the UE and indicate parameter.

Optionally, the processor 1700 determines the wave beam instruction parameter, including：

Optionally, the processor 1700 receives the index for the target pre-coding matrix that the UE is sent, including：

Receive the index of wave beam instruction parameter and target pre-coding matrix that the UE is sent.

The processor 1700 indicates that parameter determines pre-coding matrix set according to wave beam, including：

The processor 1700 is determined according to the index of the target pre-coding matrix from the pre-coding matrix set Target pre-coding matrix, including：

The first mesh is determined from the first pre-coding matrix set according to the index of the first object pre-coding matrix Pre-coding matrix is marked, and is determined from the second pre-coding matrix set according to the index of the second target pre-coding matrix Second target pre-coding matrix.

The processor 1700 indicates the first pre-coding matrix of parametric configuration according to wave beam, including：

The processor 1700 indicates parametric configuration the first pre-coding matrix set according to wave beam, including：

Construction includes the first pre-coding matrix collection of the corresponding beam vectors group of one or more described beam vectors group # It closes.

It should be noted that above-mentioned access network entity can be with the access in Fig. 5-embodiments shown in Fig. 10 in the present embodiment Network entity, the arbitrary embodiment of access network entity can be connect by above-mentioned in the present embodiment in Fig. 5-embodiment illustrated in fig. 10 Enter network entity to be realized, and reach identical advantageous effect, details are not described herein again.

In several embodiments provided herein, it should be understood that disclosed method and apparatus, it can be by other Mode realize.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only For a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component can combine Or it is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed phase Coupling, direct-coupling or communication connection between mutually can be by some interfaces, the INDIRECT COUPLING or communication of device or unit Connection can be electrical, machinery or other forms.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also It is that the independent physics of each unit includes, it can also be during two or more units be integrated in one unit.Above-mentioned integrated list The form that hardware had both may be used in member is realized, can also be realized in the form of hardware adds SFU software functional unit.

The above-mentioned integrated unit being realized in the form of SFU software functional unit can be stored in one and computer-readable deposit In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are used so that a computer Equipment (can be personal computer, server or the network equipment etc.) executes receiving/transmission method described in each embodiment of the present invention Part steps.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, abbreviation ROM), random access memory (Random Access Memory, abbreviation RAM), magnetic disc or CD etc. are various to store The medium of program code.

The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications It should be regarded as protection scope of the present invention.

Claims

1. a kind of channel state information feedback method, which is characterized in that the method includes：

The UE determines the rope of target pre-coding matrix and the target pre-coding matrix from the pre-coding matrix set Draw；

2. the method as described in claim 1, which is characterized in that the method further includes：

3. the method as described in claim 1, which is characterized in that the method further includes：

The UE determines the wave beam instruction parameter；

4. method as claimed in claim 3, which is characterized in that the UE determines the wave beam instruction parameter, including：

5. the method as described in claim 1, which is characterized in that the UE indicates parametric configuration pre-coding matrix collection according to wave beam It closes, including：

The UE indicates parametric configuration the first pre-coding matrix set, and the second pre-coding matrix set of construction according to wave beam；

The UE determines the rope of target pre-coding matrix and the target pre-coding matrix from the pre-coding matrix set Draw, including：

The UE determines that first object pre-coding matrix and the first object are pre- from the first pre-coding matrix set The index of encoder matrix, and the second target pre-coding matrix and described second is determined from the second pre-coding matrix set The index of target pre-coding matrix；

The UE sends the index of the first object pre-coding matrix and the second target precoding to access network entity The index of matrix.

6. method as claimed in claim 5, which is characterized in that the wave beam instruction parameter includes multiple bits, different Bit corresponds to different beam vectors, and the preset state of each bit indicates that the corresponding beam vectors of the bit are selected In；

The UE constructions include that the wave beam indicates that first of the corresponding beam vectors of bit of preset state in parameter prelist Code set of matrices.

7. method as claimed in claim 5, which is characterized in that the wave beam instruction parameter includes one or more beam vectors groups Number, wherein different beam vectors group # corresponds to different beam vectors groups；

The UE constructions include the first precoding set of the corresponding beam vectors group of one or more described beam vectors group #.

8. a kind of channel state information feedback method, which is characterized in that the method includes：

The access network entity determines target according to the index of the target pre-coding matrix from the pre-coding matrix set Pre-coding matrix.

9. method as claimed in claim 8, which is characterized in that the method further includes：

10. method as claimed in claim 9, which is characterized in that the access network entity determines the wave beam instruction parameter, packet It includes：

11. method as claimed in claim 8, which is characterized in that it is pre- that the access network entity receives the target that the UE is sent The index of encoder matrix, including：

12. method as claimed in claim 8, which is characterized in that the index of the target pre-coding matrix includes first object The index of the index of pre-coding matrix and the second target pre-coding matrix；

The access network entity indicates parametric configuration the first pre-coding matrix set, and the second pre-coding matrix of construction according to wave beam Set；

The access network entity determines target according to the index of the target pre-coding matrix from the pre-coding matrix set Pre-coding matrix, including：

The access network entity is according to the index of the first object pre-coding matrix from the first pre-coding matrix set Determine first object pre-coding matrix, and according to the index of the second target pre-coding matrix from second pre-coding matrix The second target pre-coding matrix is determined in set.

13. method as claimed in claim 12, which is characterized in that the wave beam instruction parameter includes multiple bits, different Bit correspond to different beam vectors, the preset state of each bit indicates that the corresponding beam vectors of the bit are selected In；

The access network entity construction includes the corresponding beam vectors of bit of preset state in the wave beam instruction parameter First pre-coding matrix set.

14. method as claimed in claim 12, which is characterized in that the wave beam instruction parameter includes one or more beam vectors Group #, wherein different beam vectors group # corresponds to different beam vectors groups；

The access network entity construction first including the corresponding beam vectors group of one or more described beam vectors group # is pre- Encoder matrix set.

15. a kind of user terminal UE, which is characterized in that the UE includes：

First determining module, for determining that target pre-coding matrix and the target prelist from the pre-coding matrix set The index of code matrix；

16. UE as claimed in claim 15, which is characterized in that the UE further includes：

17. UE as claimed in claim 15, which is characterized in that the UE further includes：

The sending module, for sending the wave beam instruction parameter and the target precoding square to the access network entity The index of battle array.

18. UE as claimed in claim 17, which is characterized in that second determining module,

19. UE as claimed in claim 15, which is characterized in that the constructing module,

For indicating parametric configuration the first pre-coding matrix set, and the second pre-coding matrix set of construction according to the wave beam；

First determining module, for from the first pre-coding matrix set determine first object pre-coding matrix and The index of the first object pre-coding matrix, and the second target precoding square is determined from the second pre-coding matrix set The index of battle array and the second target pre-coding matrix；

The sending module, index for sending from the first object pre-coding matrix to the access network entity and described The index of second target pre-coding matrix.

20. UE as claimed in claim 19, which is characterized in that the wave beam instruction parameter includes multiple bits, different Bit corresponds to different beam vectors, and the preset state of each bit indicates that the corresponding beam vectors of the bit are selected In；

The constructing module includes corresponding beam vectors of bit that the wave beam indicates preset state in parameter for construct The first pre-coding matrix set.

21. UE as claimed in claim 19, which is characterized in that the wave beam instruction parameter includes one or more beam vectors groups Number, wherein different beam vectors group # corresponds to different beam vectors groups；

The constructing module includes the first of the corresponding beam vectors group of one or more described beam vectors group # for constructing Precoding set.

22. a kind of access network entity, which is characterized in that the access network entity includes：

First determining module, for determining mesh from the pre-coding matrix set according to the index of the target pre-coding matrix Mark pre-coding matrix.

23. access network entity as claimed in claim 22, which is characterized in that the access network entity further includes：

24. access network entity as claimed in claim 23, which is characterized in that second determining module,

25. access network entity as claimed in claim 22, which is characterized in that the receiving module,

26. access network entity as claimed in claim 22, which is characterized in that the index of the target pre-coding matrix includes the The index of the index of one target pre-coding matrix and the second target pre-coding matrix；

The constructing module, for pre- according to wave beam instruction parametric configuration the first pre-coding matrix set, and construction second Encoder matrix set；

First determining module, for according to the index of the first object pre-coding matrix from first pre-coding matrix First object and encoder matrix are determined in set, and are prelisted from described second according to the index of the second target pre-coding matrix The second target pre-coding matrix is determined in code set of matrices.

27. access network entity as claimed in claim 26, which is characterized in that the wave beam instruction parameter includes multiple bits Position, different bits correspond to different beam vectors, and the preset state of each bit indicates the corresponding wave beam of the bit Vector is selected；

28. access network entity as claimed in claim 26, which is characterized in that the wave beam instruction parameter includes one or more waves Shu Xiangliang group #, wherein different beam vectors group # corresponds to different beam vectors groups；

The constructing module includes the first of the corresponding beam vectors group of one or more described beam vectors group # for constructing Pre-coding matrix set.