CN106452536B

CN106452536B - The method and apparatus of long-term feedback for multiple input multiple output communications

Info

Publication number: CN106452536B
Application number: CN201510483307.6A
Authority: CN
Inventors: 李迅; 李楠; 张闽; 杨涛
Original assignee: A Er Katelangxun; Nokia Shanghai Bell Co Ltd
Current assignee: A Er Katelangxun; Nokia Shanghai Bell Co Ltd
Priority date: 2015-08-07
Filing date: 2015-08-07
Publication date: 2019-09-06
Anticipated expiration: 2035-08-07
Also published as: CN106452536A; WO2017025807A1

Abstract

Embodiment of the disclosure provides the method and apparatus in cordless communication network for MIMO communication.This method includes receiving the long-term precoding information communicated for MIMO from equipment, the set of long-term precoding information instruction 3D wave beam, element therein are obtained by combining the column for indicating the first matrix of vertical beam group with the same row for the second matrix for indicating horizontal beam group；The short-term precoding information communicated for the MIMO is received from the equipment, which indicates the wave beam selected from the set of 3D wave beam；According to long-term precoding information and short-term precoding information, it is configured to the pre-coding matrix of MIMO communication；And the data encoded according to the pre-coding matrix are sent to the equipment.Embodiment of the disclosure also provides method and corresponding device in MIMO receiving side.

Description

The method and apparatus of long-term feedback for multiple input multiple output communications

Technical field

Embodiment of the disclosure is related to wirelessly communicating, and more specifically multiple-input and multiple-output (MIMO) communicates.

Background technique

Due to the finiteness of time and frequency resource, improving the level of resources utilization is always unremitting pursuit in the communication technology Target.MIMO technology can utilize airspace multiple data flows of simultaneous transmission in same time/frequency source block, to effectively be promoted Throughput of system.

Bidimensional (2D) MIMO transmission has been studied and by some wireless communication systems, such as third generation cooperative partner program The long term evolution (LTE) of (3GPP) is adopted.For 2D-MIMO, traditional aerial array is arranged horizontally to be formed in water Wave beam on average face.In order to utilize the potential gain from three-dimensional (3D) wireless channel, in wireless communication field, such as It in 3GPP meeting, discusses to 3D MIMO, such as discusses the modeling of 3D mimo channel.

For the mimo channel for obtaining 3D, plane (2D) aerial array will be used, to obtain the gain of vertical space.With day The dimension of linear array and the increase of channel dimensions, the feedback quantity about channel state information (CSI) will also increase.However, being used for It measures the resource of channel and the feedback channel capacity for feeding back CSI is limited, it means that need to propose new feedback knot Structure, and need to design the new code book for being directed to 3D MIMO, to promote effective feedback.

In nearest 3GPP technical report, it has been determined that 3D MIMO precoder structure.The 3D MIMO precoding Device is divided into long-term feedback and short-term feedback.Long-term feedback provides one group of wave beam, and short-term feedback is from the wave beam group of long-term feedback Middle selection wave beam or column, and execute the phase adjustment between different antennae polarization.

In embodiment of the disclosure, solution relevant to long-term feedback is provided.

Summary of the invention

The brief overview to each embodiment is shown below, to provide the basic reason to some aspects of various embodiments Solution.The general introduction is not intended to the main points of mark key element or the range of the various embodiments of description.Its sole purpose is with simplification Some concepts are presented in form, as to the aftermentioned preamble being discussed in greater detail.

The first aspect of the disclosure provides a kind of method in cordless communication network for multiple-input and multiple-output MIMO communication, It include: to receive the long-term precoding information communicated for the MIMO from equipment, the long-term precoding information indicates three-dimensional 3D The set of wave beam, wherein the element in the set of the 3D wave beam is the column by that will indicate the first matrix of vertical beam group It combines and obtains with the same row for second matrix for indicating horizontal beam group；It receives from the equipment and is communicated for the MIMO Short-term precoding information, the short-term precoding information indicates the wave beam selected from the set of the 3D wave beam；According to institute Long-term precoding information and the short-term precoding information are stated, the pre-coding matrix of the MIMO communication is configured to；And to The equipment sends the data encoded according to the pre-coding matrix.

In one embodiment, a column of the first matrix of vertical beam group and the second square for indicating horizontal beam group will be indicated The same row combination of battle array may include: to pass through the same row of the column and second matrix of first matrix Kronecker multiplication is carried out by element and is combined.

In another embodiment, long-term precoding information can indicate the long-term code book W having the following structure₁:

Wherein,WithRespectively described first matrix and second matrix, wherein i and j respectively indicates described hang down The index of straight wave beam group and the horizontal beam group；* it indicates to carry out the operation of Kronecker multiplication by column；WithTable respectively ShowWithKth column；It indicates to carry out Kronecker multiplying by element.

In one embodiment, vertical beam group is selected from vertical beam set B_V；And when vertical antenna port number is 2,4 Or when 8, the B_VIt can be the code book that respective antenna number is used for defined in long term evolution LTE version 10 or version 12 Subset.

In another embodiment, vertical beam group is selected from vertical beam set B_V；The method may further include: The equipment or base station obtain the distribution for the equipment for needing to carry out MIMO communication in the cordless communication network and for institute State at least one in the antenna configuration of MIMO communication；And at least one according in the distribution and the antenna configuration Item determines the vertical beam set B_V.In one embodiment, according in the distribution and the antenna configuration extremely One item missing determines the vertical beam set B_VMay include: in the determining distribution the maximum angle of declination of equipment and minimum have a down dip Angle；And the vertical beam set B is determined according to the maximum angle of declination and minimum angle of declination_VBeam area.Another In one embodiment, the vertical beam set B is determined at least one of according in the distribution and the antenna configuration_V It may include: the range of the transmitting apex angle of equipment in the determining distribution；And according to the distribution to the range of transmitting apex angle Interior transmitting apex angle carries out nonlinear quantization, obtains multiple segmentations, so that the difference of the number of devices in each segmentation is minimum；Really The representative angle of declination of fixed each segmentation；And the representative angle of declination using each segmentation, construct the vertical beam set B_V。

In another embodiment, the distribution and use of the equipment for needing to carry out MIMO communication in the cordless communication network are obtained At least one in the antenna configuration of MIMO communication may include: from scheduled device distribution set and antenna configuration collection A variety of distributions and a variety of antenna configurations are selected in conjunction；And wherein according in the distribution and the antenna configuration at least One determination vertical beam set B_VIt may include: to be generated respectively for a variety of distributions and/or a variety of antenna configurations Beam set, and the vertical beam set B is obtained by multiple beam sets that combination generates respectively_V。

In one embodiment, vertical beam group is selected from vertical beam set B_V；And for different antennae port Several vertical antenna configurations, vertical beam set can be different；And the vertical antenna with less antenna port number M ' configures Vertical beam set B_V,M'It can be the vertical beam set B of the vertical antenna configuration with more antenna port number M_V,M's Subset；Also, B_V,M' in beam vectorsIt can be B_V,MIn beam vectorsA part.

In another embodiment, horizontal beam group is selected from horizontal beam set B_H；And when horizontal antenna port number is 2,4 Or when 8, the B_HIt can be the code book that respective antenna number is used for defined in long term evolution LTE version 10 or version 12 Subset.In another embodiment, horizontal beam group is selected from horizontal beam set B_H；And when horizontal antenna port number is 6, B_HIt can indicate are as follows:It is therein index be l element beAnd WhereinL indicates that the total number of wave beam in horizontal domain beam set, T are indicated for horizontal domain The oversample factor of DFT matrix, the transposition of Tr representing matrix.

In some embodiments, vertical beam group is selected from vertical beam set B_V；The vertical beam set B_VIt can be pre- Definition either by high-level signaling by/Xiang Suoshu equipment notice, or downloaded before the use by the equipment； And/or horizontal beam group is selected from horizontal beam set B_H；The horizontal beam set B_HCan be it is predefined either By high-level signaling by/Xiang Suoshu equipment notice, or can download before the use.

The second aspect of the disclosure provides a kind of method in cordless communication network for MIMO communication, comprising: to equipment The long-term precoding information for MIMO communication is sent, the long-term precoding information indicates the set of three-dimensional 3D wave beam, Wherein the element in the set of the 3D wave beam is the column and expression level by that will indicate the first matrix of vertical beam group The same row of second matrix of wave beam group is combined and is obtained；It sends to the equipment and prelists in short term for what the MIMO was communicated Code information, the short-term precoding information indicate the wave beam selected from the set of the 3D wave beam；It is wherein described to prelist for a long time Code information and the short-term precoding information are used to be used to be configured to by the equipment pre-coding matrix of the MIMO communication； And the data encoded according to the pre-coding matrix are received from the equipment.

In one embodiment, a column and the second of expression horizontal beam group for the first matrix of vertical beam group will be indicated The same row combination of matrix may include: to lead to the same row of the column and second matrix of first matrix It crosses and is carried out Kronecker multiplication by element and combined.

Long-term precoding information can indicate the long-term code book W having the following structure in another embodiment₁:

In one embodiment, the vertical beam group can be selected from vertical beam set B_V；The B_VIt can be with the disclosure It is identical described in first aspect.

In one embodiment, horizontal beam group can be selected from horizontal beam set B_H；And the B_HIt can be with the disclosure It is identical described in first aspect.

The third aspect of the disclosure provides the device in a kind of cordless communication network for more MIMO communication, including first connects Unit is received, is configured as receiving the long-term precoding information communicated for the MIMO, the long-term precoding information from equipment The set for indicating three-dimensional 3D wave beam, wherein the element in the set of the 3D wave beam is by that will indicate the first of vertical beam group One column of matrix are combined with the same row of second matrix of expression horizontal beam group and are obtained；Second receiving unit, is configured To receive the short-term precoding information communicated for the MIMO from the equipment, the short-term precoding information is indicated from described The wave beam selected in the set of 3D wave beam；Pre-coding matrix structural unit, be configured as according to the long-term precoding information and The short-term precoding information is configured to the pre-coding matrix of the MIMO communication；And transmitting unit, it is configured as to institute It states equipment and sends the data encoded according to the pre-coding matrix.

In one embodiment, vertical beam group is selected from vertical beam set B_v, and device may further include: letter Acquiring unit is ceased, is configured as obtaining the distribution for the equipment for needing to carry out MIMO communication in the cordless communication network and for institute State at least one in the antenna configuration of MIMO communication；And vertical beam set determination unit, it is configured as according to described point At least one described determining described vertical beam set B in cloth and the antenna configuration_V。

The fourth aspect of the disclosure provides the device in a kind of cordless communication network for MIMO communication, comprising: the first hair Unit is sent, is configured as sending the long-term precoding information communicated for the MIMO, the long-term precoding information to equipment The set for indicating three-dimensional 3D wave beam, wherein the element in the set of the 3D wave beam is by that will indicate the first of vertical beam group One column of matrix are combined with the same row of second matrix of expression horizontal beam group and are obtained；Second transmission unit, is configured To send the short-term precoding information communicated for the MIMO to the equipment, the short-term precoding information is indicated from described The wave beam selected in the set of 3D wave beam；Wherein the long-term precoding information and the short-term precoding information are by the equipment For being configured to the pre-coding matrix of the MIMO communication；And receiving unit, it is configured as receiving basis from the equipment The data of the pre-coding matrix coding.In one embodiment, the vertical beam group can be selected from vertical beam set B_V； The B_VIt can be identical as described in the first aspect of the disclosure.In one embodiment, horizontal beam group can be selected from level Beam set B_H；And the B_HIt can be identical as described in the first aspect of the disclosure.

In one embodiment, vertical beam group is selected from vertical beam set B_v, and the device may further include: Information acquisition unit is configured as obtaining the distribution for needing the equipment for carrying out MIMO communication in the cordless communication network and be used for At least one of in the antenna configuration of the MIMO communication；And vertical beam set determination unit, it is configured as according to At least one described determining described vertical beam set B in distribution and the antenna configuration_V。

Method or apparatus according to an embodiment of the present disclosure can be improved the validity of long-term precoding information feedback, change The performance of kind 3D MIMO.

Although specific embodiment has been illustrated by way of example in the accompanying drawings, it being understood, however, that, this paper's is specific The description of embodiment is not intended to for embodiment to be limited to disclosed concrete form.

Detailed description of the invention

From following disclosure and claim, purpose, advantage and other features of the disclosure will become brighter It is aobvious.Here merely for exemplary purpose, the non restrictive description of preferred embodiment is provided with reference to attached drawing, in the accompanying drawings:

Fig. 1 shows the wireless communication system of method that is illustrative, being implemented within embodiment of the disclosure Schematic diagram；

Fig. 2 a-2c shows the flow chart of the method for sender's implementation according to an embodiment of the present disclosure, in MIMO；

Fig. 3 a-3b shows the flow chart of the method for recipient's implementation according to an embodiment of the present disclosure, in MIMO；

Fig. 4 shows the structure chart of the device of sender's implementation according to an embodiment of the present disclosure, in MIMO；And

Fig. 5 shows the structure chart of the device of recipient's implementation according to an embodiment of the present disclosure, in MIMO.

Specific embodiment

In the following description, many details are illustrated for purposes of illustration.However, those of ordinary skill in the art will recognize Embodiment of the disclosure can be realized without using these details by knowing.Therefore, the disclosure be not intended to by It is limited to illustrated embodiment but will be endowed and the consistent widest scope of principles and features described herein.

It should be appreciated that term " first ", " second " etc. are used only for distinguishing an element and another element.And Actually the first element can also be referred to as second element, and vice versa.In addition it should also be understood that " comprising ", "comprising" only by with Illustrate stated feature, element, function or the presence of component, however is not precluded that there are one or more others Feature, element, function or component.

For the ease of explaining, herein will be the implementation of the background introduction disclosure with 3GPP LTE/LTE- advanced (LTE-A) Example, and using specific term in LTE/LTE-A, however, as will be understood by the skilled person in the art, the implementation of the disclosure Example is not limited to the application environment of 3GPP LTE/LTE-A, on the contrary, but can be applied to that any there are the nothings of similar problems In line communication system, such as WLAN, or following other communication systems etc. developed.Equally, setting in embodiment of the disclosure It is standby to can be user equipment (UE), it is also possible to any terminal of wireless communication function, including but not limited to, mobile phone, calculating Machine, personal digital assistant, game machine, wearable device and sensor etc..Term UE can be with movement station, subscriber station, shifting Dynamic terminal, user terminal or wireless device are used interchangeably.In addition, equipment is also possible to network node, such as node B (Node B, Or NB), base transceiver station (BTS), base station (BS) or base station sub-system (BSS), relaying, remote radio heads (RRF) etc..

It has been presented in Fig. 1 the wireless communication system of method illustrative, that embodiment of the disclosure can be implemented within The schematic diagram of system 100.Wireless communication system 100 may include one or more network node 101, for example, in this example, Network node 101 can be presented as base station, such as the node B (eNodeB or eNB) of evolution.It should be understood that the network section Point 101 can also be presented as other forms, such as node B (Node B or NB), base transceiver station (BTS), base station (BS) or base station sub-system (BSS), repeater etc..Network node 101 can be multiple nothings within its coverage area Line equipment (for example, UE 102-104) provides radio connection.

Network node 101 can equipped with 2D aerial array (for example, M row N is arranged and is had cross-polarized aerial array), It is communicated with providing with the 3D MIMO of UE.In 3GPP RAN1 meeting, it has been determined that following five kinds of antenna configurations have higher Priority: be arranged as two rows, two column dual polarization (being expressed as V2H2P2) 8 transmitting radio unit (TXRU), be arranged as two rows The 12TXRU of three column dual polarizations or three rows, two column dual polarization (being expressed as V2H3P2, V3H2P2), and it is arranged as two rows The 16TXRU of four column dual polarizations or four rows, two column dual polarization (being expressed as V2H4P2, V4H2P2).

MIMO communication can be applied to the downlink direction from base station to UE, also can be applied to from UE to base station Uplink direction.For downlink mimo, UE can be based on such as down-bound pilot frequency signal estimation channel state information (CSI) And base station is fed back to, for obtaining the configured transmission appropriate for downlink MIMO communication in base station side.

Pre-coding matrix index (PMI) is the important channel state feedback information of one of MIMO communication system, is referred to Surely the index for the pre-coding matrix of MIMO.In 3GPP meeting, the code book W of 3D MIMO is had agreed to_3DUsing following base This structure:

W_3D=W₁W₂ (1)

Wherein W₁It is long-term and broadband pre-coding matrix (or referred to as code book) feedback, according to long-term CSI instruction one Group wave beam, and W₂It is short-term and subband precoding matrix feedback, from W₁Certain wave is further chosen in one group of wave beam of definition Beam, that is, choose specific column from the wave beam group of long-term code book, and adjust the phase between different antennae polarization.W₁Code book and W₂ Code book is chosen from corresponding codebook set respectively and feeds back to the transmitting terminal of MIMO.

Currently, in 3GPP standardisation process, for some particular/special requirements of design construction of MIMO code book, these requirements Including for example, constant amplitude characteristic, Nested property；Wherein the constant amplitude of constant amplitude characteristic requirements code book, i.e. precoding be not Increase transmission power；And nested particular requirement is for the subset that the code book of low order order design is for the code book of high-order order design. And the presently disclosed design scheme about 3D MIMO code book is most and does not meet the above-mentioned requirements of 3GPP formulation, and needs Job engagement in terms of biggish implementation complexity and/or more standardization.In addition, code book existing in 3GPP standard It is to be based on wave beam grid (GoB) criterion, and horizontal dimensions are only accounted in the design of these code books, and do not consider vertical dimension Degree, therefore 3D mimo channel is not appropriate for.

In order to which using the potential gain of perpendicular domains in 3D mimo channel, the design of long-term code book should be by perpendicular domains channel Characteristic accounts for.In addition, antenna port number and new antenna configuration for newly introducing, it should also design for horizontal and The new long-term code book and beam set of perpendicular domains, to utilize the Potential performance gain of 3D mimo channel.

In the disclosure, generation and feedback are proposed for the long-term code book of 3D mimo channel and the side of beam set Method and device.

As an example, the 2D aerial array of sender (such as eNB) can have M row and N array antenna port, in recipient (such as UE), receiving signal can be represented as:

Y=H_3DW_3Ds+n (2)

Wherein Y indicates that the signal before the merging received, s indicate to send signal, and n indicates noise and interference, H_3DIt indicates 3D channel, and W_3DIt indicates 3D precoder, can be indicated by above-mentioned formula (1).As described above, W in (1) formula₁It is long-term It is fed back with broadband code book, one group of wave beam, and W is indicated according to long-term CSI₂It is short-term and subband code book feedback, according to short Phase CSI is from W₁Particular beam is further chosen in one group of wave beam of definition, and adjusts the phase between different antennae polarization.W₁'s Structure can be expressed as follows:

WhereinIndicate Kronecker (Kronecker) multiplying, whereinWithIt can be respectively from vertical wave Constriction closes B_VWith horizontal beam set B_HThe wave beam of middle selection.

The concept of traditional Kronecker multiplication used in (3) formula is the multiplication by element.That is, one The Kronecker product of the matrix of the matrix and another 2x2 of 2x2 by be a 4x4 matrix because 4 of first matrix Element will be multiplied respectively with the 4 of second matrix elements.In other words, ifIn have x wave beam,Middle y Wave beam, then by the way that xy 3D wave beam will be obtained after original Kronecker multiplicative combination.The number of obtained 3D wave beam The size of short-term code book will be directly affected, because short-term code book will carry out beam selection from 3D beam set.In order to long-term The 3D wave beam number that combines in code book carries out more precise control, proposed in the disclosure expression of new long-term precoding information with And long-term code book construction method.

Referring now to Fig. 2 a, show in accordance with an embodiment of the present disclosure in cordless communication network (such as network 100) The flow chart of method 200 for MIMO communication.This method 200 can be executed by the sender of MIMO, such as in downlink It is executed in the case where MIMO by the eNB 101 in Fig. 1, or by the UE102-104 in Fig. 1 in the case where Uplink MIMO Any one is executed.Only as an example, in the following description, this method is executed by eNB.

As shown in Figure 2 a, this method 200 includes: at block S201, and eNB is received from equipment (such as UE 102) and is used for MIMO The long-term precoding information of communication, the set of the long-term precoding information instruction three-dimensional 3D wave beam, wherein the collection of the 3D wave beam Element in conjunction is the column and the second matrix of expression horizontal beam group by that will indicate the first matrix of vertical beam group Same row combination and obtain；The short-term precoding information communicated for the MIMO is received from equipment in block S202, the eNB, it should Short-term precoding information indicates the wave beam selected from the set of the 3D wave beam；In block S203, eNB is long-term according to what is received Precoding information and short-term precoding information are configured to the pre-coding matrix of MIMO communication；And in block S204, eNB to Equipment sends the data encoded according to the pre-coding matrix.

The set of the 3D wave beam of received long-term precoding information instruction, element are by that will indicate to hang down at block S201 One column of the first matrix of straight wave beam group are combined with the same row of the second matrix of expression horizontal beam group and are obtained, this wave Limitation is introduced in the combination of beam, that is, only make the one of the first matrix to arrange the same row of (such as i-th column) with the second matrix (being similarly the i-th column) can be combined, so as to reduce the numbers of beams finally obtained, so that short-term feedback is able to use more Small code book therefrom selects wave beam.

In one embodiment, by passing through a column of the first matrix and the same row of the second matrix by element progress gram The mode of Luo Neike multiplication operation is combined.But embodiment of the disclosure is without being limited thereto, but can be using any appropriate Mode carry out column combination, for example, by each element weighting multiplication in a manner of combination.

In one embodiment of the present disclosure, received long-term precoding information instruction has the following structure at block S201 Long-term code book W₁:

Wherein,WithIt respectively indicates the first matrix of vertical beam group and indicates the second square of horizontal beam group Battle array, wherein i and j respectively indicates the index of the vertical beam group and the horizontal beam group；* it indicates to carry out Kronecker by column Multiplication operation；WithIt respectively indicatesWithKth column；It indicates to carry out Kronecker multiplying by element.? In the embodiment, compared to existing codebook design shown in (3) formula, replaced using Kronecker multiplication (being indicated with *) by column Have by traditional Kronecker multiplication of element to limit the combination of perpendicular domains wave beam group and horizontal domain wave beam group Help the number for the 3D wave beam that reduction obtains and the expense of short-term feedback.Meanwhile the method for the embodiment using the disclosure, In the case where the 3D wave beam number of acquisition is certain, compared to conventional method, horizontal wave number group and vertical wavenumber can allow for There are more wave beams in group, that is, allow there are more column in the first matrix and the second matrix, it means that horizontal beam and vertical Wave beam can be more finely controlled to obtain combined 3D wave beam.For example it is assumed thatWithThe respectively matrix of 2x4, then Method according to an embodiment of the present disclosure can obtain 4 3D wave beams；And according to conventional method, 4 3D wave beams are obtained, WithIt can only be the matrix of 2x2.

In one embodiment, vertical beam group is selected from vertical beam set B_V.For example, in (3) or (4)It can be with Selected from vertical beam set B_V.Therefore, vertical beam set B_VDesign directly affect long-term code book W₁Size and efficiency.It is right The antenna configuration for being 2,4,8 in antenna port number, has been defined corresponding code book, specifically in 3GPP Standard Edition 10 and 12 Definition may refer to 36.211 6.3.4 of TS section.However existing tradition code book is optimized for several antenna configurations in 3GPP , such as the single polarization (antenna spacing is wavelength/2) closely placed, the cross polarization closely placed is placed at a distance Cross polarization (antenna spacing is 4 times of wavelength).And in 3D MIMO, antenna configuration can be set as the intersection closely placed Polarization.Therefore, traditional code book antenna configuration specific for 3D MIMO for the optimization of several antenna configurations is not optimal 's.Therefore, the disclosure proposes that a subset for being suitable for the configuration of specific vertical antenna is chosen from traditional code book is used for 3D MIMO Vertical beam set.Therefore, in one embodiment, when vertical antenna port number is 2,4 or 8, B_VIt can be LTE editions Subset defined in sheet 10 or version 12 for the code book of respective antenna number.This aspect can be improved the effect of code book On the one hand rate can more reuse existing design.

In one embodiment, vertical beam group is selected from vertical beam set B_V；And Wherein index is that the wave beam of k is expressed asAndM-th of element representation are as follows:

Wherein M indicates the number of vertical antenna port, and T indicates oversample factor, for example, for 8 vertical antenna ports and 4 Times over-sampling, TxM=32.The transposition of Tr representing matrix.In this embodiment, vertical beam set is discrete Fourier transform (DFT) over-sampling of matrix.

DFT matrix is a kind of good approximation for the scene that extends with wide-angle, such as horizontal domain, however, for tool The perpendicular domains for having low-angle to extend may not be optimization.It therefore, can be using new in another embodiment of the present disclosure Codebook design to improve performance, such as further decrease feedback overhead and increase code book point using limited codebook size Degree of distinguishing.

Another example flow diagram of method 200 is provided in figure 2b.As shown in Figure 2 b, this method 200 can be wrapped further It includes and constructs vertical beam set B using following manner_V: in block S205, obtains and need to carry out MIMO in the cordless communication network At least one of in the distribution of the equipment of communication and the antenna configuration communicated for the MIMO；And in block S206, according to institute State at least one described determining described vertical beam set B in distribution and the antenna configuration_V.The building (i.e. block S205 and S206 it) can be executed at the equipment for executing this method 200, such as the equipment is eNB the case where for downlink MIMO；The building It can also be executed by the equipment for sending long-term code book, for example, being eNB for the Uplink MIMO equipment.

In another embodiment, specific distributed model or antenna configuration model can be assumed in block S205, and in block S206 constructs B according to the hypothesis_V。

In another embodiment, it at block S205, is selected from scheduled device distribution set and antenna configuration set more Kind distribution and a variety of antenna configurations；And at block S206, generated respectively for a variety of distributions and/or a variety of antenna configurations Beam set, and the vertical beam set B is obtained by multiple beam sets that combination generates respectively_V.This can be to avoid Multiple code books are defined for different user distribution models and different antenna configurations.

In addition, k indicates that the index of wave beam in vertical beam set, m indicate 2D aerial array (2D AAA) in (5) formula Perpendicular domains line index.The disclosure inventors noted that the angle spread due to perpendicular domains is small, all waves can't be selected Beam constitutes vertical beam set.In addition, beam separation is related to vertical antenna port number (line number of 2D AAA).Therefore, may be used Further to control beam separation and beam area, to reduce code book for a long time, improve code book efficiency, reduce feedback overhead.

From downwards bevel beam angle θ angle, vertical beam weight termIt can be represented as:

(5) formula of control, available:

And

Wherein θ_maxAnd θ_minIndicate minimum and maximum angle of declination, d_VIndicate the antenna spacing between vertical antenna port, and λ Indicate the wavelength of carrier frequency, k_maxIt indicates in beam set B_VIn there is maximum angle of declination θ_maxWave beam index, and k_minTable Show in beam set B_VIn there is minimum angle of declination θ_minWave beam index.

In one embodiment of the present disclosure, vertical wave is determined according at least one in device distribution and antenna configuration Constriction closes B_VIt include: the maximum angle of declination θ that equipment in the distribution is for example determined in block S206_maxWith minimum angle of declination θ_min；With And the vertical beam set B is determined according to the maximum angle of declination and minimum angle of declination_VBeam area.

In one embodiment, θ can be found according to using fixed/scheduled user distribution model_maxAnd θ_min；? In another embodiment, θ can also be obtained based on the actual distribution of UE in base station_maxAnd θ_min。

It in one embodiment, can be by θ_maxAnd θ_minBetween beam area be evenly dividing into each wave beam, to obtain Vertical beam set B_V.In another embodiment, the distribution of non-uniform wave beam also can be used, this depends on point of user Cloth situation.

It is assumed that the wave beam towards UE has transmitting apex angle (ZOD) θ_i(0≤θ_i≤ π), then the precoding vector for corresponding to wave beam can To be expressed as follows:

That is, the design of code book is equivalent to one group of angle of declination Θ={ θ of design_i| 1≤i≤K }, this is needed to UE's ZOD is quantified, and minimizes quantizing distortion.For equally distributed UE, be adapted for use with equal interval quantizing find it is best under Tilt angles theta, and vertical code book is calculated according to aforementioned process.However, UE is usually not equally distributed in perpendicular domains, therefore, to this Region progress equivalent quantization is simultaneously non-optimal.In the disclosure, the reality when designing angle of declination using nonlinear quantization is provided Apply example.

The vertical beam set B that building has the distribution of non-uniform wave beam is given below_VAn example.In the example In, the vertical beam set B is determined according at least one in device distribution and antenna configuration_V, such as it is real by block S206 It applies.As shown in Figure 2 c, block S206 may further include:

At block S2061, the range of the transmitting apex angle of equipment in the distribution is determined；For example, assuming that ZOD range is [x_up, x_down], the starting point and cut off of the range are respectively x₀=x_upAnd x_K=x_down.Wherein x₀=x_upIndicate the highest towards UE Wave beam, and x_K=x_downIndicate the minimum wave beam towards UE；

At block S2062, nonlinear quantization is carried out to the transmitting apex angle in the range of transmitting apex angle according to the distribution, is obtained To multiple segmentations, so that the difference of the number of devices in each segmentation is minimum；It is assumed that the range is divided into K=2^BA segmentation, X= [x₀,x₁,…,x_K], as an example, waypoint can be calculated as follows, so that the UE phase as far as possible in each segmentation Deng, but embodiment of the disclosure is not limited to this calculation:

Wherein f_X(x) number of the UE with angle of declination x is indicated.

At block S2063, the representative angle of declination of each segmentation is determined；Representative angle of declination Θ in each segmentation for example can benefit It is obtained with following equation, so that the sum of the representative angle of declination and the difference of angle of declination of each UE in the segmentation are minimum:

Wherein,It indicates in segmentation [x_i,x_i+1) in c-th of UE ZOD.It should be noted that embodiment of the disclosure It is not limited to obtain the representative angle of declination of each segmentation with any specific calculation/formula, but can take any suitable When approximate way determine that one group for beam set represents angle of declination；

Further, at block S2064, using the representative angle of declination of each segmentation, the vertical beam set B is constructed_V.By This vertical code book constructed is for UE distribution optimization.

As described above, the vertical code book that order is 1 can be described as using the method based on beam space:Wherein k-th of code bookIt can be represented as:

WhereinIn one embodiment, For the vertical antenna configuration with different antennae port number, vertical beam set B_VCan be different, also, it is directed to the vertical day M The vertical beam set of line port number can be expressed as B_V,M, and can be with for the vertical beam set of M ' vertical antenna port number It is expressed as B_V,M'。

In one embodiment, the vertical beam set B that the vertical antenna with less antenna port number M ' configures_V,M'It is The vertical beam set B of vertical antenna configuration with more antenna port number M_V,MSubset；For example,AndMeanwhile B_V,M'In beam vectorsIt is B_V,MIn Beam vectorsA part, such as

In another embodiment, horizontal beam group is selected from horizontal beam set B_H.It is had existed in 3 gpp for 2,4,8 Code book definition in the case of antenna port, however existing tradition code book optimizes for several antenna configurations in 3GPP, example The single polarization (antenna spacing is wavelength/2) placed such as short distance, the cross polarization closely placed, the intersection placed at a distance Polarization (antenna spacing is 4 times of wavelength)；And in 3D MIMO, antenna configuration can be set as specifically configuring, such as closely The cross polarization of placement.Therefore, it is not optimal for reusing traditional code book antenna configuration specific for 3D MIMO, if will Its direct reuse makees horizontal beam set and will lead to redundancy, and makes whole long-term code book low efficiency.Therefore, in the disclosure It, will be traditional in order to reduce due to introducing perpendicular domains wave beam group and increased whole long-term codebook size in one embodiment Several entries in horizontal code book should remove, to obtain horizontal beam set B_H.That is, in one embodiment, working as water When plane antenna port number is 2,4 or 8, B_HIt can be defined in long term evolution LTE version 10 or version 12 for phase Answer the subset of the code book of antenna number.

In existing 3GPP standard, the antenna configuration of 6 antenna ports is not supported.And in 3D MIMO, by that may deposit The 2D aerial array for being 6 in horizontal antenna port number, therefore, in the disclosure, additionally providing for horizontal antenna port number is 6 Design scheme.

In one embodiment, horizontal beam group is selected from horizontal beam set B_H；And when horizontal antenna port number is 6 When, B_HIt can be expressed asIt is therein index be l element beAnd And whereinL indicates that the total number of wave beam in horizontal domain beam set, T are indicated for horizontal domain The oversample factor of DFT matrix.

It should be noted that although providing building vertical beam set B in some embodiments_VMethod and step, but It is, in other embodiments, vertical beam set B_VIt is also possible to predefined.In one embodiment, vertical beam Set B_VIt can be notified from base station by high-level signaling to UE.In another embodiment, B_VIt can also be by equipment (such as eNB, UE) It downloads before the use.

Similar, horizontal beam set B_HIt is also possible to predefined or passes through high-level signaling by/Xiang Suoshu equipment Notice, or can download before the use.

As skilled in the art will understand, method 200 can also include other unshowned behaviour in Fig. 2 a-2c Make, such as according to vertical beam set B_VConstruct the operation of long-term code book.The construction for example can be carried out conventionally, because This, is not described in detail in the disclosure.

In accordance with an embodiment of the present disclosure, the instruction of long-term precoding information can be effectively provided.In some embodiments, Can distribution based on equipment design beam set, keep whole long-term code book more effective, while reducing feedback overhead, improve 3D The performance of MIMO.

Referring now to Fig. 3 a, shows and used in cordless communication network (such as network 100) in accordance with an embodiment of the present disclosure In the flow chart of the method 300 of MIMO communication.This method 300 is corresponding with method 200, and can be held by the recipient of MIMO Row.For example, can be executed by the UE 102 in Fig. 1 in the case where downlink MIMO, or in the case where Uplink MIMO by ENB 101 in Fig. 1 is executed.Only as an example, in the following description, this method is executed by UE.

As shown in Figure 3a, this method 300 includes: and sends to equipment (such as eNB) for MIMO communication at block S301 Long-term precoding information, the long-term precoding information indicate the set of 3D wave beam, and wherein the element in the set of the 3D wave beam is By combining the column for indicating the first matrix of vertical beam group with the same row for the second matrix for indicating horizontal beam group It obtains；At block S302, the short-term precoding information communicated for the MIMO, the short-term precoding information are sent to the equipment Indicate the wave beam selected from the set of 3D wave beam；Its medium-term and long-term precoding information and short-term precoding information can be by the equipment (such as by eNB, at the block S203 of method 200) is used to be configured to the pre-coding matrix of MIMO communication；And in block S303 receives the data encoded according to the pre-coding matrix from the equipment.The data for example can be by eNB in method 200 Block S204 at send.

The UE for executing the exemplary method 300 can be communicated with the eNB for executing exemplary method 200, the hair including executing data It send and receives, and related with MIMO feedback information sends and receives.Therefore, the long-term precoding sent in block S301 Information can be with reference to Fig. 2 describe method 200 in block S201 at received long-term precoding information, accordingly, with respect to Fig. 2 with Method 200 carry out about long-term precoding information, long-term code book W₁, vertical beam set B_V, horizontal beam set B_HDescription It is equally applicable herein, therefore no longer repeat one by one.For example, long-term precoding information can indicate have in one embodiment (4) the long-term code book W of structure shown in formula₁。

In another embodiment, vertical beam set B can be selected from by the vertical beam group that the first matrix indicates_V.? In one example, B_VIt can be the code book that respective antenna number is used for defined in long term evolution LTE version 10 or version 12 Subset.In another example, B_VIt can be the distribution according to UE and construct.For example, it may be according to such as preceding combination Fig. 2 b Block S205, S206 building, and block S206 may include the operation in the S2061-S2064 with reference to described in Fig. 2 c. In the case where Uplink MIMO, the equipment for implementing this method 300 can be eNB, therefore, in one embodiment, in method 300 It also may include block S205-S206 in Fig. 2 b；And in another embodiment, block S206 may further include in Fig. 2 c Operation in S2061-S2064, as shown in Figure 3b.

Fig. 4 shows according to an embodiment of the present disclosure within a wireless communication network for multiple-input and multiple-output MIMO communication The exemplary block diagram of device 400.In one embodiment, device 400 may be implemented as sender's (example in MIMO communication Such as, eNB 101 or UE102) or its a part.Device 400 can be used to execute the method referring to described in Fig. 2 a-2c 200 and any other processing and method.It should be appreciated that method 200 is not limited to be executed by device 400, method 200 At least some pieces can also be executed by other devices or entity.

As shown in figure 4, device 400 includes the first receiving unit 401, it is configured as receiving from equipment for MIMO communication Long-term precoding information, the long-term precoding information indicate the set of 3D wave beam, and wherein the element in the set of 3D wave beam is By combining the column for indicating the first matrix of vertical beam group with the same row for the second matrix for indicating horizontal beam group It obtains；Second receiving unit 402 is configured as receiving the short-term precoding letter communicated for the MIMO from the equipment Breath, the short-term precoding information indicate the wave beam selected from the set of the 3D wave beam；Pre-coding matrix structural unit 403, it is configured as being configured to the MIMO communication according to the long-term precoding information and the short-term precoding information Pre-coding matrix；And transmitting unit 404, it is configured as sending the number encoded according to the pre-coding matrix to the equipment According to.

Since device 400 can be used to execute referring to method 200 described in Fig. 2 a-2c, accordingly, with respect to Fig. 2 a-2c With method 200 carried out about long-term precoding information, short-term precoding information and long-term code book W₁, vertical beam collection Close B_V, horizontal beam set B_HDescription it is equally applicable herein, and be not repeated.For example, can further be wrapped in device 400 It includes for information acquisition unit 405, is configured as obtaining the equipment for needing to carry out MIMO communication in the cordless communication network At least one of in distribution and the antenna configuration communicated for the MIMO；And vertical beam set determination unit 406, matched It is set at least one determining described vertical beam set B according in the distribution and the antenna configuration_V。

As skilled in the art will understand, device 400 can also include unshowned unit in other Fig. 4, example Such as according to vertical beam set B_VConstruct the unit of long-term code book.

Fig. 5 shows according to an embodiment of the present disclosure within a wireless communication network for multiple-input and multiple-output MIMO communication The exemplary block diagram of device 500.In one embodiment, device 500 may be implemented as recipient's (example in MIMO communication Such as, eNB 101 or UE102) or its a part, and MIMO communication can be carried out with device 400.Device 500 can operate For executing method 300 and any other processing and method referring to described in Fig. 3.It should be appreciated that the not office of method 300 It is limited to be executed by device 500, at least some pieces of method 300 can also be executed by other devices or entity.

As shown in figure 5, device 500 includes the first transmission unit 501, it is configured as being used for equipment (such as eNB) transmission The long-term precoding information of MIMO communication, the set of the long-term precoding information instruction 3D wave beam, wherein 3D wave beam Element in set is the column and the second matrix of expression horizontal beam group by that will indicate the first matrix of vertical beam group Same row combination and obtain；Second transmission unit 502 is configured as sending to the equipment for MIMO communication Short-term precoding information, the short-term precoding information indicate the wave beam selected from the set of the 3D wave beam；It is wherein described Long-term precoding information and the short-term precoding information can be logical for being configured to the MIMO by the equipment (such as eNB) The pre-coding matrix of letter；And receiving unit 503, it is configured as receiving from the equipment and is encoded according to the pre-coding matrix Data.

Since device 500 can be used to execute referring to method 300 described in Fig. 3, and communicated with device 400, therefore, About method 200,300 carried out about long-term precoding information, short-term precoding information and long-term code book, vertical wave Constriction closes B_V, horizontal beam set B_HDescription it is equally applicable herein, and be not repeated.For example, in one embodiment, the dress The a part (such as UL MIMO) for being embodied as base station is set, and the device may further include information acquisition unit 504, it is configured as obtaining the distribution for the equipment for needing to carry out MIMO communication in the cordless communication network and for the MIMO At least one of in the antenna configuration of communication；And vertical beam set determination unit 505, be configured as according to it is described distribution and At least one described determining described vertical beam set B in the antenna configuration_V.In one embodiment, the vertical beam Set determination unit 505 can be configured as perfoming block 206, at least partly function in 2061-2064.

The advantages of method and apparatus that embodiment of the disclosure is proposed includes at least one of below:

The long-term code book of 3D MIMO can be effectively designed for；

Long-term code book is distributed suitable for specific UE；

To reduce the size and feedback overhead of long-term code book；And

Realize the improvement of 3D-MIMO system performance.

It will be readily appreciated by those skilled in the art that the block or step in various above-mentioned various methods can pass through volume The computer of journey executes.In the disclosure, some embodiments, which are also intended to, covers program storage device, for example, numerical data is deposited Storage media, the instruction repertorie that this is machine or computer-readable and encoding machine is executable or computer is executable, wherein The some or all of steps of the described instruction execution above method.Program storage device can be, for example, digital storage, such as Magnetic storage medium, hard disk drive or the optical readable digital data storage medium of Disk and tape.The embodiment is also intended to culvert The computer for the step of lid is programmed to carry out the above method.

The function of the various elements for the device being shown in the accompanying drawings, can by using software, specialized hardware and with it is suitable When software is associated be able to carry out software hardware or firmware or its in conjunction with providing.When provided by a processor, The function can be provided by single application specific processor, by single shared processor or by multiple individual processors.In addition, art Language " processor " can include but is not limited to, digital signal processor (DSP) hardware, network processing unit, specific integrated circuit (ASIC), field programmable gate array (FPGA), for storing read-only memory (ROM), the random access memory of software (RAM) and non-volatile memory device.It can also include other conventional and/or customization hardware.

It will be appreciated by those skilled in the art that the description and the appended drawings are merely illustrative the principle of the disclosure.Therefore, it should manage Solution, those skilled in the art will design various arrangements, although not being explicitly described or showing here, the cloth It sets the principle for embodying the disclosure and is included in spirit and scope of the present disclosure.In addition, all example masters illustrated here Main idea is clearly being only used for teaching purpose, with help reader understand the disclosure principle and inventor's contribution for promoting ability The concept in domain, and example and condition that these are specifically illustrated should be to be construed as being without limitation of.Moreover, illustrating the original of the disclosure here Reason, aspect and embodiment be described and its specific example is also intended to comprising its equivalent.

Claims

1. a kind of method for multiple-input and multiple-output MIMO communication within a wireless communication network, comprising:

The long-term precoding information communicated for the MIMO is received from equipment, the long-term precoding information indicates three-dimensional 3D wave The set of beam, wherein the element in the set of the 3D wave beam be by will indicate the first matrix of vertical beam group one column with Indicate horizontal beam group the second matrix same row combination and obtain；

The short-term precoding information communicated for the MIMO is received from the equipment, the short-term precoding information is indicated from institute State the wave beam selected in the set of 3D wave beam；

According to the long-term precoding information and the short-term precoding information, it is configured to the precoding square of the MIMO communication Battle array；And

The data encoded according to the pre-coding matrix are sent to the equipment.

2. according to the method described in claim 1, will wherein indicate that a column of the first matrix of vertical beam group and expression are horizontal The same row of second matrix of wave beam group combines

A column for first matrix and the same row of second matrix are passed through by element progress Kronecker Multiplication and combine.

3. according to the method described in claim 1, wherein the long-term precoding information indicates the long code phase having the following structure This W₁:

Wherein,WithRespectively described first matrix and second matrix, wherein i and j respectively indicates the vertical wave The index of horizontal beam group described in Shu Zuhe；* it indicates to carry out the operation of Kronecker multiplication by column；WithIt respectively indicates WithKth column；It indicates to carry out Kronecker multiplying by element.

4. according to claim 1 to method described in any claim in 3, wherein the vertical beam group is selected from vertical beam Set B_V；And when vertical antenna port number is 2,4 or 8, the B_VIt is in long term evolution LTE version 10 or version 12 The subset of the defined code book for respective antenna number.

5. according to claim 1 to method described in any claim in 3, wherein the vertical beam group is selected from vertical beam Set B_V；The method further includes:

In the equipment or base station,

Obtain the distribution for the equipment for needing to carry out MIMO communication in the cordless communication network and the day for MIMO communication At least one of in line configuration；And

The vertical beam set B is determined at least one of according in the distribution and the antenna configuration_V。

6. according to the method described in claim 5, wherein at least one of according in the distribution and the antenna configuration Determine the vertical beam set B_VInclude:

Determine the maximum angle of declination of equipment and minimum angle of declination in the distribution；And

The vertical beam set B is determined according to the maximum angle of declination and minimum angle of declination_VBeam area.

7. according to the method described in claim 5, wherein at least one of according in the distribution and the antenna configuration Determine the vertical beam set B_VInclude:

Determine the range of the transmitting apex angle of equipment in the distribution；And

Nonlinear quantization is carried out to the transmitting apex angle in the range of transmitting apex angle according to the distribution, obtains multiple segmentations, so that The difference of number of devices in each segmentation is minimum；

Determine the representative angle of declination of each segmentation；And

Using the representative angle of declination of each segmentation, the vertical beam set B is constructed_V。

8. needing to carry out setting for MIMO communication in the cordless communication network according to the method described in claim 5, wherein obtaining Standby distribution and in the antenna configuration of MIMO communication at least one of include:

A variety of distributions and a variety of antenna configurations are selected from scheduled device distribution set and antenna configuration set；And

The vertical beam set B is wherein determined at least one of according in the distribution and the antenna configuration_VInclude:

Beam set is generated respectively for a variety of distributions and/or a variety of antenna configurations, and generated respectively by combination Multiple beam sets obtain the vertical beam set B_V。

9. according to claim 1 to method described in any claim in 3, wherein the vertical beam group is selected from vertical beam Set B_V；And the vertical antenna with different antennae port number is configured, vertical beam set is different；And

The vertical beam set B of vertical antenna configuration with less antenna port number M '_V,M'It is that there is more antenna port number M Vertical antenna configuration vertical beam set B_V,MSubset；Also, B_V,M'In beam vectorsIt is B_V,MIn wave beam VectorA part.

10. according to claim 1 to method described in any claim in 3, wherein the horizontal beam group is selected from horizontal wave Constriction closes B_H；And when horizontal antenna port number is 2,4 or 8, the B_HIt is long term evolution LTE version 10 or version 12 Defined in the code book for respective antenna number subset.

11. according to claim 1 to method described in any claim in 3, wherein the horizontal beam group is selected from horizontal wave Constriction closes B_H；And when horizontal antenna port number is 6, the B_HAre as follows: index therein is l Element beAnd whereinL indicates horizontal domain beam set The total number of middle wave beam, T indicate the oversample factor of the DFT matrix for horizontal domain, Tr representing matrix transposition.

12. according to claim 1 to method described in any claim in 3, in which:

The vertical beam group is selected from vertical beam set B_V；The vertical beam set B_VIt is predefined or passes through height Layer signaling is by/Xiang Suoshu equipment notice, or is downloaded before the use by the equipment；And/or

The horizontal beam group is selected from horizontal beam set B_H；The horizontal beam set B_HIt is predefined or passes through height Layer signaling is by/Xiang Suoshu equipment notice, or can download before the use.

13. a kind of method for multiple-input and multiple-output MIMO communication within a wireless communication network, comprising:

The long-term precoding information communicated for the MIMO is sent to equipment, the long-term precoding information indicates three-dimensional 3D wave The set of beam, wherein the element in the set of the 3D wave beam be by will indicate the first matrix of vertical beam group one column with Indicate horizontal beam group the second matrix same row combination and obtain；

The short-term precoding information communicated for the MIMO is sent to the equipment, the short-term precoding information is indicated from institute State the wave beam selected in the set of 3D wave beam；Wherein the long-term precoding information and the short-term precoding information are used for by institute State the pre-coding matrix that equipment is configured to the MIMO communication；And

The data encoded according to the pre-coding matrix are received from the equipment.

14. according to the method for claim 13, wherein by a column of the first matrix for indicating vertical beam group and expression water The same row combination of second matrix of flat wave beam group includes: by the institute of the column and second matrix of first matrix Same row is stated to combine and carrying out Kronecker multiplication by element.

15. according to the method for claim 13, wherein long-term precoding information instruction have the following structure it is long-term Code book W₁:

Wherein,WithRespectively described first matrix and second matrix, wherein i and j respectively indicates the vertical wave The index of horizontal beam group described in Shu Zuhe；* it indicates to carry out the operation of Kronecker multiplication by column；WithIt respectively indicatesWithKth column；It indicates to carry out Kronecker multiplying by element.

16. method described in any claim in 3 to 15 according to claim 1, wherein the vertical beam group be selected from it is vertical Beam set B_V；And when vertical antenna port number is 2,4 or 8, the B_VIt is long term evolution LTE version 10 or version Subset defined in 12 for the code book of respective antenna number.

17. method described in any claim in 3 to 15 according to claim 1, wherein the vertical beam group be selected from it is vertical Beam set B_V；The method further includes, in the equipment or base station,

18. according to the method for claim 17, wherein at least one according in the distribution and the antenna configuration Item determines the vertical beam set B_VInclude:

The beam area of the vertical beam set BV is determined according to the maximum angle of declination and minimum angle of declination.

19. according to the method for claim 17, wherein at least one according in the distribution and the antenna configuration Item determines the vertical beam set B_VInclude:

Determine the representative angle of declination of each segmentation；And

20. according to the method for claim 17, needing to carry out MIMO communication in the cordless communication network wherein obtaining The distribution of equipment and in the antenna configuration of MIMO communication at least one of include from scheduled device distribution set and A variety of distributions and a variety of antenna configurations are selected in antenna configuration set；And

The vertical beam set B is wherein determined at least one of according in the distribution and the antenna configuration_VIncluding needle Beam set, and the multiple waves generated respectively by combination are generated respectively to a variety of distributions and/or a variety of antenna configurations Constriction closes to obtain the vertical beam set B_V。

21. method described in any claim in 3 to 15 according to claim 1, wherein the vertical beam group be selected from it is vertical Beam set B_V；And

For the vertical antenna configuration with different antennae port number, vertical beam set is different；And

The vertical beam set BV of vertical antenna configuration with less antenna port number M '_,M' is that have more antenna port number M Vertical antenna configuration vertical beam set B_V,MSubset；Also, B_V,M'In beam vectorsIt is B_V,MIn wave beam VectorA part.

22. method described in any claim in 3 to 15 according to claim 1, wherein the horizontal beam group is selected from level Beam set B_H；And when horizontal antenna port number is 2,4 or 8, the B_HIt is long term evolution LTE version 10 or version Subset defined in 12 for the code book of respective antenna number.

23. method described in any claim in 3 to 15 according to claim 1, wherein the horizontal beam group is selected from level Beam set B_H；And when horizontal antenna port number is 6, the BH are as follows: index therein is The element of l isAnd whereinL indicates horizontal domain beam set The total number of middle wave beam, T indicate the oversample factor of the DFT matrix for horizontal domain, Tr representing matrix transposition.

24. method described in any claim in 3 to 15 according to claim 1, in which:

The vertical beam group is selected from vertical beam set B_V；The vertical beam set B_VIt is predefined or passes through height Layer signaling is by/Xiang Suoshu equipment notice, or can download before the use；And/or

25. a kind of device for multiple-input and multiple-output MIMO communication within a wireless communication network, comprising:

First receiving unit is configured as receiving the long-term precoding information communicated for the MIMO from equipment, described long-term Precoding information indicates the set of three-dimensional 3D wave beam, wherein the element in the set of the 3D wave beam is by that will indicate vertical wave One column of the first matrix of beam group are combined with the same row of the second matrix of expression horizontal beam group and are obtained；

Second receiving unit is configured as receiving the short-term precoding information communicated for the MIMO from the equipment, described Short-term precoding information indicates the wave beam selected from the set of the 3D wave beam；

Pre-coding matrix structural unit is configured as according to the long-term precoding information and the short-term precoding information, structure Make the pre-coding matrix for MIMO communication；And

Transmitting unit is configured as sending the data encoded according to the pre-coding matrix to the equipment.

26. device according to claim 25, wherein by a column of the first matrix for indicating vertical beam group and expression water The same row combination of second matrix of flat wave beam group includes: by the institute of the column and second matrix of first matrix Same row is stated to combine and carrying out Kronecker multiplication by element.

27. device according to claim 25, wherein the long-term precoding information instruction have the following structure it is long-term Code book W₁:

28. the device according to any claim in claim 25 to 27, wherein the vertical beam group is selected from vertically Beam set B_V；And when vertical antenna port number is 2,4 or 8, the B_VIt is long term evolution LTE version 10 or version Subset defined in 12 for the code book of respective antenna number.

29. the device according to any claim in claim 25 to 27, wherein the vertical beam group is selected from vertically Beam set B_V；Described device further comprises:

Information acquisition unit, be configured as obtaining the equipment for needing to carry out MIMO communication in the cordless communication network distribution and For at least one in the antenna configuration of MIMO communication；And

Vertical beam set determination unit, be configured as according to it is described distribution and the antenna configuration in described at least one of really The fixed vertical beam set B_V。

30. device according to claim 29, wherein the vertical beam set determination unit is configured as:

31. device according to claim 29, wherein the vertical beam set determination unit is configured as:

Determine the representative angle of declination of each segmentation；And

32. device according to claim 29, wherein the information acquisition unit is configured as from scheduled device distribution A variety of distributions and a variety of antenna configurations are selected in set and antenna configuration set；And

The vertical beam set determination unit is configured as generating respectively for a variety of distributions and/or a variety of antenna configurations Beam set, and the vertical beam set B is obtained by multiple beam sets that combination generates respectively_V。

33. the device according to any claim in claim 25 to 27, wherein the vertical beam group is selected from vertically Beam set B_V；And

The vertical beam set B of vertical antenna configuration with less antenna port number M '_V,M'It is that there is more antenna port number M Vertical antenna configuration vertical beam set B_{V, M}Subset；Also, B_V,M'In beam vectorsIt is B_V,MIn wave beam VectorA part.

34. the device according to any claim in claim 25 to 27, wherein the horizontal beam group is selected from level Beam set B_H；And when horizontal antenna port number is 2,4 or 8, the B_HIt is long term evolution LTE version 10 or version Subset defined in 12 for the code book of respective antenna number.

35. the device according to any claim in claim 25 to 27, wherein the horizontal beam group is selected from level Beam set B_H；And when horizontal antenna port number is 6, the B_HAre as follows: index therein is The element of l isAnd whereinL indicates horizontal domain beam collection The total number of wave beam in conjunction, T indicate the oversample factor of the DFT matrix for horizontal domain, Tr representing matrix transposition.

36. the device according to any claim in claim 25 to 27, in which:

37. a kind of device for multiple-input and multiple-output MIMO communication within a wireless communication network, comprising:

First transmission unit is configured as sending the long-term precoding information communicated for the MIMO to equipment, described long-term Precoding information indicates the set of three-dimensional 3D wave beam, wherein the element in the set of the 3D wave beam is by that will indicate vertical wave One column of the first matrix of beam group are combined with the same row of the second matrix of expression horizontal beam group and are obtained；

Second transmission unit is configured as sending the short-term precoding information communicated for the MIMO to the equipment, described Short-term precoding information indicates the wave beam selected from the set of the 3D wave beam；The wherein long-term precoding information and described Short-term precoding information is used to be configured to the pre-coding matrix of the MIMO communication by the equipment；And

Receiving unit is configured as receiving the data encoded according to the pre-coding matrix from the equipment.

38. the device according to claim 37, wherein by a column of the first matrix for indicating vertical beam group and expression water The same row combination of second matrix of flat wave beam group includes: by the institute of the column and second matrix of first matrix Same row is stated to combine and carrying out Kronecker multiplication by element.

39. the device according to claim 37, wherein long-term precoding information instruction have the following structure it is long-term Code book W₁:

40. the device according to any claim in claim 37 to 39, wherein the vertical beam group is selected from vertically Beam set B_V；And when vertical antenna port number is 2,4 or 8, the B_VIt is long term evolution LTE version 10 or version Subset defined in 12 for the code book of respective antenna number.

41. the device according to any claim in claim 37 to 39, wherein the vertical beam group is selected from vertically Beam set B_V；Described device further comprises:

42. device according to claim 41, wherein the vertical beam set determination unit is configured as:

43. device according to claim 41, wherein the vertical beam set determination unit is configured as:

Determine the representative angle of declination of each segmentation；And

44. device according to claim 41, wherein the information acquisition unit is configured as from scheduled device distribution A variety of distributions and a variety of antenna configurations are selected in set and antenna configuration set；And

Wherein the vertical beam set determination unit is configured as a variety of distributions and/or a variety of antenna configurations difference Beam set is generated, and obtains the vertical beam set B by multiple beam sets that combination generates respectively_V。

45. the device according to any claim in claim 37 to 39, wherein the vertical beam group is selected from vertically Beam set B_V；And

46. the device according to any claim in claim 37 to 39, wherein the horizontal beam group is selected from level Beam set B_H；And when horizontal antenna port number is 2,4 or 8, the B_HIt is long term evolution LTE version 10 or version Subset defined in 12 for the code book of respective antenna number.

47. the device according to any claim in claim 37 to 39, wherein the horizontal beam group is selected from level Beam set B_H；And when horizontal antenna port number is 6, the B_HAre as follows: index therein is The element of l isAnd whereinL indicates horizontal domain beam collection The total number of wave beam in conjunction, T indicate the oversample factor of the DFT matrix for horizontal domain, Tr representing matrix transposition.

48. the device according to any claim in claim 37 to 39, in which: