CN106612133A - Method and device for MIMO (multiple-input-multiple-output) communication - Google Patents

Method and device for MIMO (multiple-input-multiple-output) communication Download PDF

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Publication number
CN106612133A
CN106612133A CN201510691154.4A CN201510691154A CN106612133A CN 106612133 A CN106612133 A CN 106612133A CN 201510691154 A CN201510691154 A CN 201510691154A CN 106612133 A CN106612133 A CN 106612133A
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wave beam
grid
group
wave
dimension
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CN106612133B (en
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李迅
张闽
杨涛
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Nokia Shanghai Bell Co Ltd
Alcatel Optical Networks Israel Ltd
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Alcatel Lucent Shanghai Bell Co Ltd
Alcatel Optical Networks Israel Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting

Abstract

The invention provides a method for MIMO communication. The method comprises that information for long-term precoding is received from equipment, the information for long-term precoding indicates a first wave beam group aimed at the first dimension and a second wave beam group aimed at the second dimension to form a 2D wave beam grid, and wave beams in the wave beam grid or wave beams in subsets of the wave beam grid are mapped into a wave beam set according to a mapping rule; and short-term precoding information comprises a one-dimensional index is received from the equipment, and indicates to select wave beams from the wave beam set; and according to the long-term precoding information and the short-term precoding information, data of MIMO precoding is sent to the equipment. The invention also provides a corresponding device. According to embodiments of the invention, feedback of precoding information is simpler and more efficient.

Description

For the method and apparatus of multiple input multiple output communications
Technical field
Embodiment of the disclosure is related to radio communication, and more specifically multiple-input and multiple-output (MIMO) communicate.
Background technology
With the development of radio communication, the demand of data rate is improved constantly, while frequency Resource becomes deficienter, in order to improve the level of resources utilization, it has been proposed that MIMO skills Art.MIMO technology can utilize spatial domain multiple data of simultaneous transmission on same running time-frequency resource Stream, so as to effectively lift system handling capacity.
Bidimensional (2D) MIMO transmission is studied and by some wireless communication systems, example As Long Term Evolution (LTE) system that third generation cooperative partner program (3GPP) is formulated is adopted Receive.For 2D-MIMO, traditional aerial array is arranged horizontally is put down with being formed in level Wave beam on face.In order to using the potential gain from three-dimensional (3D) wireless channel, in nothing The line communications field, such as in 3GPP meetings, (example that 3D MIMO are discussed Such as referring to 3GPP documents TR 36.873), for example, discuss the propagation of 3D mimo channels Modeling.
It is to obtain more potential gains, plane (2D) communication satellite from 3D wireless channels Row have been used to form 3D wave beams in horizontal and vertical domain.This antenna arrangement causes day Line port number increases the change with antenna structure, and this will affect the statistical property of wireless channel. Therefore, need to design new code book for this 2D active antenna array.Especially, in order to The MIMO transmission of multithread is supported, needs design code to support the transmission rank more than 1 originally.
The content of the invention
The brief overview to each embodiment is shown below is, to provide to various embodiments The basic comprehension of a little aspects.The general introduction is not intended to identify the main points of key element or describes various The scope of embodiment.Its sole purpose is that some concepts are presented in simplified form, used as right The aftermentioned preamble being discussed in greater detail.
The first aspect of the disclosure provide it is a kind of for multiple-input and multiple-output MIMO communication Method, the method includes：The long-term precoding for MIMO communications is received from equipment Information, first wave beam group of the long-term precoding information indicator to the first dimension, and For the second wave beam group of the second dimension, second dimension is different from first dimension； Wherein, the first wave beam group and the second wave beam group constitute the wave beam grid of 2 dimensions, and And the wave beam in the subset of the wave beam in the wave beam grid or the wave beam grid by according to Mapping ruler is mapped to beam set；Receive for MIMO communications from the equipment Short-term precoding information, the short-term precoding information includes one-dimensional index, the index For the wave beam for indicating to be selected from the beam set；And according to the long-term precoding Information and the short-term precoding information, to the equipment number of Jing MIMO precodings is sent According to.
In one embodiment, mapping ruler can include at least in following mapping ruler It is individual：According to the preferential order of the first dimension by the wave beam in wave beam grid or the wave beam net Wave beam in the subset of lattice is mapped to the beam set；It is preferential according to the second dimension Sequentially by the ripple in the subset of the wave beam in the wave beam grid or the wave beam grid Beam is mapped to the beam set；According to random order by the wave beam in the wave beam grid Or the wave beam in the subset of the wave beam grid is mapped to the beam set；And In a predetermined sequence by described in the wave beam in the wave beam grid or the wave beam grid Wave beam in subset is mapped to the beam set.
In another embodiment, the method may further include：Send to the equipment Long-term precoding configuration information, the long-term precoding configuration information is used for from the first wave Shu Zuzhong carries out the first wave beam group that beam selection obtains compressing, and from second wave beam The second wave beam group that beam selection obtains compressing is carried out in group；The first wave of wherein described compression The the second wave beam group compressed described in Shu Zuhe constitutes the subset of the wave beam grid.
In another embodiment, the method may further include：Send to the equipment and reflect Configuration information is penetrated, the mapping configuration indicates mapping ruler.
In one embodiment, short-term precoding information also includes phase adjustment information, is used for Indicate the phase adjustment between different antennae polarization, also, the length of the phase adjustment information Degree is depending on the numbers of beams included by the beam set.
In one embodiment, when the beam set only includes single wave beam, phase place is adjusted The length of whole information is more than the phase place adjustment information when the beam set includes multiple wave beams Length.
In one embodiment, when the beam set only includes single wave beam, described one At least a portion bit of the index of dimension is used for the phase adjustment information.
In another embodiment, at least N number of wave beam in the first wave beam group is each other just Hand over, and at least N number of wave beam in the second wave beam group is mutually orthogonal directions, wherein N is positive integer, and N is to need holding orthogonal determined by transmission rank in wave beam group Minimum numbers of beams.
The second aspect of the disclosure provides a kind of method for MIMO communications, including： The long-term precoding information for MIMO communications is sent to equipment, it is described to prelist for a long time First wave beam group of the code information indicating finger to the first dimension, and for the second of the second dimension Wave beam group, second dimension is different from first dimension；Wherein, first wave beam Group and the second wave beam group constitute the wave beam grid of 2 dimensions, and in the wave beam grid Wave beam in the subset of wave beam or the wave beam grid is mapped to wave beam according to mapping ruler Set；The short-term precoding information for MIMO communications is sent to equipment, it is described short Phase precoding information includes one-dimensional index, and the index is used to indicate from the beam set The wave beam of middle selection；And receive the data of Jing MIMO precodings from the equipment.
In one embodiment, mapping ruler includes at least one of following mapping ruler： According to the preferential order of the first dimension by the wave beam in wave beam grid or the wave beam grid Wave beam in the subset is mapped to the beam set；According to the preferential order of the second dimension Wave beam in the subset of the wave beam in the wave beam grid or the wave beam grid is reflected It is mapped to the beam set；According to random order by the wave beam in the wave beam grid or Wave beam in the subset of the wave beam grid is mapped to the beam set；And according to Predetermined order is by the wave beam in the wave beam grid or the subset of the wave beam grid In wave beam be mapped to the beam set.
In another embodiment, the method may further include：Receive from the equipment and grow Phase precoding configuration information, the long-term precoding configuration information is used for from first wave beam The first wave beam group that beam selection obtains compressing is carried out in group, and from the second wave beam group In carry out beam selection obtain compress the second wave beam group；First wave beam of wherein described compression Group and the second wave beam group of the compression constitute the subset of the wave beam grid.
In another embodiment, the method may further include：Receive from the equipment and reflect Configuration information is penetrated, the mapping configuration indicates mapping ruler.
In one embodiment, short-term precoding information also includes phase adjustment information, is used for Indicate the phase adjustment between different antennae polarization, also, the length of the phase adjustment information Degree is depending on the numbers of beams included by the beam set.
In one embodiment, when the beam set only includes single wave beam, phase place is adjusted The length of whole information is more than the phase place adjustment information when the beam set includes multiple wave beams Length.
In one embodiment, when the beam set only includes single wave beam, described one At least a portion bit of the index of dimension is used for the phase adjustment information.
In another embodiment, at least N number of wave beam in the first wave beam group in the method is It is orthogonal, and at least N number of wave beam in the second wave beam group is mutually orthogonal directions, Wherein N is positive integer, and N is to need holding just determined by transmission rank in wave beam group The minimum numbers of beams of friendship.
The third aspect of the disclosure provides a kind of device for MIMO communications, including： First receptor, is configured to receive prelisting for a long time for MIMO communications from equipment Code information, first wave beam group of the long-term precoding information indicator to the first dimension, with And for the second wave beam group of the second dimension, second dimension is different from the described first dimension Degree；Wherein, the first wave beam group and the second wave beam group constitute the wave beam grid of 2 dimensions, And the wave beam in the subset of the wave beam in the wave beam grid or the wave beam grid is pressed Beam set is mapped to according to mapping ruler；Second receptor, is configured to from equipment receive use In the short-term precoding information of MIMO communications, the short-term precoding information includes one The index of dimension, the index is used for the wave beam for indicating to be selected from the beam set；First Transmitter, is configured to according to the long-term precoding information and the short-term precoding information, The data of Jing MIMO precodings are sent to the equipment.
In one embodiment, the device may further include：Second transmitter, is matched somebody with somebody It is set to the equipment and sends long-term precoding configuration information, the long-term precoding matches somebody with somebody confidence The the first wave beam group compressed for carrying out beam selection to obtain from the first wave beam group is ceased, And carry out from the second wave beam group beam selection obtain compress the second wave beam group；Its Described in the first wave beam group for compressing and the second wave beam group of the compression constitute the wave beam net The subset of lattice.
In another embodiment, the device may further include：3rd transmitter, is matched somebody with somebody It is set to the equipment and sends mapping configuration, the mapping configuration indicates mapping rule Then.
The fourth aspect of the disclosure provides a kind of device for MIMO communications, including： First transmitter, is configured to send prelisting for a long time for MIMO communications to equipment Code information, first wave beam group of the long-term precoding information indicator to the first dimension, with And for the second wave beam group of the second dimension, second dimension is different from first dimension； Wherein, the first wave beam group and the second wave beam group constitute the wave beam grid of 2 dimensions, and And the wave beam in the subset of the wave beam in the wave beam grid or the wave beam grid by according to Mapping ruler is mapped to beam set；Second transmitter, is configured to be sent to the equipment For the short-term precoding information of MIMO communications, the short-term precoding information includes One-dimensional index, the index is used for the wave beam for indicating to be selected from the beam set；With And first receptor, it is configured to from the equipment receive the data of Jing MIMO precodings.
In one embodiment, the device may further include：Second receptor, is matched somebody with somebody It is set to from the equipment and receives long-term precoding configuration information, the long-term precoding matches somebody with somebody confidence The the first wave beam group compressed for carrying out beam selection to obtain from the first wave beam group is ceased, And carry out from the second wave beam group beam selection obtain compress the second wave beam group；Its Described in the first wave beam group for compressing and the second wave beam group of the compression constitute the wave beam net The subset of lattice.
In another embodiment, the device may further include：3rd receptor, is matched somebody with somebody It is set to from the equipment and receives mapping configuration, the mapping configuration indicates mapping rule Then.
Method or apparatus in accordance with an embodiment of the present disclosure, can simplify short-term precoding information Feedback；And in certain embodiments, for high-transmission order, can have by offer The wave beam group of orthogonal beams and improve the performance of 3D MIMO.
Although being illustrated by way of example specific embodiment in the accompanying drawings, however, should Work as understanding, description herein of specific embodiments is not intended to be limited to embodiment disclosed Concrete form.
Description of the drawings
From disclosure below and claim, the purpose of the disclosure, advantage and other Feature will be apparent from.Here merely for the purpose of example, refer to the attached drawing is excellent to be given The non restrictive description of embodiment is selected, in the accompanying drawings：
Fig. 1 a show method that is exemplary, being implemented within embodiment of the disclosure Wireless communication system schematic diagram；
Fig. 1 b show the schematic diagram of exemplary 2D aerial arrays；
Fig. 2 a-2d illustrate in accordance with an embodiment of the present disclosure, match somebody with somebody for the various of long-term column selection The schematic diagram put；
Fig. 3 show in accordance with an embodiment of the present disclosure, MIMO sender implement The flow chart of method；
Fig. 4 show in accordance with an embodiment of the present disclosure, MIMO recipient implement The flow chart of method；
Fig. 5 show in accordance with an embodiment of the present disclosure, MIMO sender implement The structure chart of device；And
Fig. 6 show in accordance with an embodiment of the present disclosure, MIMO recipient implement The structure chart of device.
Specific embodiment
In the following description, many details are illustrated for purposes of illustration.However, ability Domain in the case where these details are not used skilled artisan will realize that can realize Embodiment of the disclosure.Therefore, the disclosure be not intended to be limited to illustrated embodiment but The most wide scope consistent with principles and features described herein will be endowed.
It should be appreciated that term " first ", " second " etc. be used only for by an element with it is another One element makes a distinction.And actually the first element can also be referred to as second element, instead It is as the same.In addition " including " is should also be understood that, "comprising" is used only for illustrating what is stated The presence of feature, element, function or part, but it is not precluded from presence one or many Individual other features, element, function or part.
For the ease of explaining, herein will be with 3GPP LTE/LTE- senior (LTE-A) as the back of the body Scape introduces embodiment of the disclosure, and using LTE/LTE-A (for example, TS36.211v.c70, TS36.212v.c60, TS36.213vc70) in specific term, however, such as this area Technical staff is it should be understood that embodiment of the disclosure is not limited to 3GPP LTE/LTE-A's Applied environment, conversely, and can be to be applied to any radio communication that there are Similar Problems In system, such as WLAN, device-to-device communicates or following other communications developed System, such as 5G, etc..Equally, the equipment in embodiment of the disclosure can be that user sets Standby (UE), or with any terminal of radio communication function, including but not limited to, handss Machine, computer, personal digital assistant, game machine, wearable device and sensor etc.. Term UE can be with movement station, subscriber station, mobile terminal, user terminal or wireless device Used interchangeably.In addition, the base station in embodiment of the disclosure can be, 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 (RRH) etc..
Give in fig 1 a it is exemplary, embodiment of the disclosure can be implemented within The schematic diagram of the wireless communication system 100 of method.Wireless communication system 100 can include one Individual or multiple network nodes 101, for example, in this example, network node 101 can be with body It is now base station, the node B (eNodeB, or eNB) of such as evolution.It should be appreciated that The network node 101 can also be presented as other forms, such as node B (Node B, or Person NB), base transceiver station (BTS), repeater etc..Network node 101 can be place Multiple wireless devices (for example, UE 102-104) within its coverage provide wireless Electrical connection.
Network node 101 can be equipped with 2D aerial arrays, such as N shown in Fig. 1 b1OK N2Row and cross-polarized active antenna array, are communicated with providing with the 3D MIMO of UE. The MIMO communications can apply to downlink (forward link) side from base station to UE To, it is also possible to up-link (reverse link) direction being applied to from UE to base station.For Downlink mimo, it is considered to which transmitting terminal uses 2D active antenna array, and sending signal S is expressed as, then the signal Y that receiving terminal was received before merging can be represented as：
Y=HWs+n (1)
Wherein H represents the Technique of Wireless MIMO Channel with 3D radio propagation models, and n is represented and made an uproar Sound and interference, W represents MIMO precoders, and W can be expressed as below：
W=W1W2 (2)
Wherein, W1It is long-term and the pre-coding matrix (or referred to as code book) in broadband feeds back, its root According to channel condition information (CSI) one group of wave beam of instruction in long-term and broadband, and W2It is short-term With the feedback of subband, it is from W1One or more ripple is further chosen in the wave beam group of definition Beam, i.e. one or more row are chosen from the wave beam group of long-term code book, and is adjusted not on the same day Phase place between linear polarization.
UE can estimate channel condition information based on such as down-bound pilot frequency signal, and will be long Phase code book W1With short-term code book W2MIMO base station is fed back to respectively.W1Structure can be with table Show as follows：
WhereinKronecker (Kronecker) multiplying is represented,WithFirst is represented respectively The wave beam group of dimension (such as vertical dimensions) and the ripple of the second dimension (such as horizontal dimensions) Beam group.I, j represent respectively the index of wave number group.WithCan include, but not limited to from The wave beam elected in discrete Fourier transform (DFT) matrix.WithEach row represent One wave beam, for exampleM1Row andM2Row can be expressed as：
Wherein N1,N2The first dimension of aerial array and the antenna port number of the second dimension are represented respectively, o1And o2The first dimension of aerial array and the oversample factor of the second dimension are represented respectively.
The channel conditions of transmitting terminal and receiving terminal determine the transmission rank that can be supported.For order is 1 Transmission, the X in long-term code book shown in (3) formula1And X2Can be expressed as followsin：
Wherein L1' and L2' the first dimension of aerial array and the wave beam group of the second dimension are represented respectively Size, i.e. the numbers of beams in wave beam group；s1And s2The first dimension of aerial array is represented respectively The interblock space of the wave beam group of degree and the second dimension.In certain embodiments, for main aerial Port number (2.N1.N2) be 12 and 16 situation, L1' and L2' can be set to L1'=4, L2'=2.
Because short-term code book be used in the wave beam group indicated from long-term code book further select ripple Beam, so, larger wave beam group size is intended to more load for short-term code book Feedback.In order to reduce the feedback overhead of short-term code book, can be long-term to long-term beam group application Column selection (referring to the document R1-156217 of 3GPP RAN1#82bis).For example, for a long time Column selection can adopt four kinds of configurations as shown in Figure 2 a-2d, wherein it is assumed that L1'=4 and L2'=2, each block in figure represents a wave beam, and black block represents selected wave beam.It is false Surely L is used1And L2The numbers of beams Jing after long-term column selection in wave beam group is represented, then shown in Fig. 2 a In configuration 1, (L1,L2)=(1,1), (s1,s2)=(1,1), i.e. only select one from wave beam grid Individual wave beam.In the configuration 2 for illustrating in figure 2b, (L1,L2)=(2,2), (s1,s2)=(2,2)；Should Configuration selects adjacent square four wave beam from wave beam grid.What is illustrated in figure 2 c matches somebody with somebody Put in 3, (L1,L2)=(2,2), (s1,s2)=(2,2)；From unlike configuration 2, have selected not Adjacent 2D wave beams.In the configuration 4 for illustrating in figure 2 c, (L1,L2)=(2,2), (s1,s2)=(2,2)；And only have selected horizontal wave beam.
For the transmission that order is 1, short-term code book W2The wave beam of horizontal dimensions is only selected, afterwards According to (2) formula, the short-term code book is further applied on the long-term code book after long-term column selection, Can obtain, for example：
Wherein Q represents main aerial port number；The subscript of W(1)Represent that order is 1；m1And m2Be from The wave beam selected in wave beam group (in other words, the wave beam group after compression) after long-term column selection Index；φnRepresent the phase adjustment factor between different antennae polarization, and φn=ejπn/2, n∈{0,1,2,3}。
For the transmission rank more than 1, more than one wave beam will be selected.In this case, it is Indicate to be constituted in the second wave beam group of the first wave beam group by the first dimension and the second dimension 2 dimension wave beam grids in multiple wave beams for selecting, the feedback of short-term code book will not be able to directly Using existing design, because existing design only allows short-term code book to carry out the wave beam choosing in horizontal domain Select.
In order to realize simple and effective short-term codebook design, while the transmission rank more than is supported, The present disclosure proposes the device of improved method.
Figure 3 illustrates in accordance with an embodiment of the present disclosure in cordless communication network (such as net Network 100) in for MIMO communication method 300 flow chart.The method 300 can To be performed by the sender of MIMO, such as by Fig. 1 a in the case of descending MIMO In eNB 101 perform, or by the UE in Fig. 1 a in the case of Uplink MIMO Any one execution in 102-104.Only as an example, in the following description, the method Performed by eNB.
As shown in figure 3, the method 300 includes：At block S301, eNB is from equipment (example Such as UE 102) the long-term precoding information communicated for MIMO is received, it is described to prelist for a long time First wave beam group of the code information indicating finger to the first dimension, and for the second of the second dimension Wave beam group, second dimension is different from first dimension；Wherein, the first wave beam group and Second wave beam group constitutes the wave beam grid of 2 dimensions, and the wave beam in the wave beam grid or institute The wave beam stated in the subset of wave beam grid is mapped to beam set according to mapping ruler；In block S302, eNB receive the short-term precoding information for MIMO communications, institute from the equipment Short-term precoding information is stated including one-dimensional index, the index is used to indicate from the wave beam The wave beam selected in set；In block S303, the eNB according to the long-term precoding information and The short-term precoding information, to the equipment data of Jing MIMO precodings are sent.
In one embodiment, the long-term precoding information for receiving at block S301 can be indicated Long-term code book W1 as shown in (3) formula, it is by the first dimension (such as vertical dimensions) Wave beam group X1With wave beam group X of the second dimension (such as horizontal dimensions)2Represent, and X1 And X2Every string can be expressed as, such as form shown in (4) formula.But, such as originally Art personnel it will be appreciated that, X1And X2Concrete form be given only as example , embodiment of the disclosure is not limited to this.
In one embodiment, the long-term precoding information can be presented as long-term precoding rope Draw the form of (PMI).
In one embodiment, the reception of S301 can pass through physical uplink control channel Carry out, but embodiment of the disclosure not limited to this.For example, in other examples, The reception of S301 can also be carried out by physical uplink link shared channels.
In specifications of the current 3GPP with regard to LTE (such as Rel-10), short-term code book Only it is used for carrying out the column selection of horizontal dimensions, therefore, it is not appropriate for for from above-mentioned long code phase Wave beam is selected in this for 3D MIMO communications, especially for the transmission rank more than 1.
In order to obtain effective short-term code book feedback, for example, make it possible to reuse existing LTE (especially transmission rank is more than 1 to support 3D MIMO for short-term codebook design in Rel-10 3D MIMO), in embodiment of the disclosure, it is proposed that wave beam mapping concept.Will Tie up the wave beam in wave beam grid and be mapped in 2 be made up of the first wave beam group and the second wave beam group In one beam set so that short-term code book feedback can only using 1 dimension index from Middle selection wave beam, as selecting wave beam from horizontal domain in LTE Rel-10.
In another embodiment, it is also possible to first long-term column selection is carried out to long-term code book and obtained To compressed the first wave beam group and the second compressed wave beam group, then by by compressed Wave beam mapping in the wave beam grid that first wave beam group and the second compressed wave beam group are constituted To beam set, and wave beam is therefrom selected using short-term code book.For example, compressed first Wave beam group and the second compressed wave beam group can be according in the example arrangements in Fig. 2 a-2d Arbitrary configuration is obtained.
Therefore, in accordance with an embodiment of the present disclosure, the short-term precoding information for receiving in S302 Indicate the wave beam selected from the beam set being mapped to.
In one embodiment, according to the long-term precoding information and short-term precoding letter for receiving Breath, it may be determined that following final precoder：
Wherein, in one embodiment,Can be the W indicated by long-term precoding information1；And In another embodiment,Can be the W Jing after long-term column selection1, i.e. W1Subset, For example,Can be expressed as：
W2It is designed to select wave beam in long-term precoder, and to different antenna polarizations Using phase adjustment.In accordance with an embodiment of the present disclosure, due to by long-term precoder The first dimension the first wave beam group (or its subset in the case of with long-term column selection) With the second wave beam group (or its subset in the case of with long-term column selection) of the second dimension Wave beam in the 2 dimension wave beam grids for being constituted is mapped to a beam set, so W2Can be with By the index of 1 dimension the selected wave beam of each order for example, can be reused come indicator Existing W in LTE Rel-102Design, i.e.,
Wherein k and k ' indicate respectively for the selected wave beam of first the second order of sum of ranks (or be referred to as Row) one-dimensional index, 0≤k, k'≤L1L2-1；ekRepresent that k-th element is 1 remaining element For 0 vector, this is to amount instructionKth arrange selected by short-term feedback；N indicates phase The index of position Dynamic gene.
According to one embodiment of the disclosure, for 2 are tieed up the wave beam in wave beam grids or Wave beam in the subset of the wave beam grid is mapped to the mapping ruler of the beam set Including：According to the preferential order of the first dimension by the wave beam in wave beam grid or the wave beam Wave beam in the subset of grid is mapped to the beam set.For example, the mapping ruler Can be represented as：
According to the mapping ruler by (configuration 2), the wave beam that the long-term column selections of Jing are obtained in Fig. 2 b Selected wave beam (black block in figure) in grid be mapped to beam set b0, B1, b2, b3 } in can obtain：
B0=(0,0), b1=(1,0), b2=(0,1), b3=(1,1) (12)
Wherein (i, j) represents the first dimension wave beam for be mappeding to of each element in beam set and the The index of two-dimensionses wave beam.
In another embodiment, the mapping ruler can also include preferential according to the second dimension Sequentially by the ripple in the subset of the wave beam in the wave beam grid or the wave beam grid Beam is mapped to the beam set.The mapping ruler for example can be represented as：
According to the mapping ruler by the wave beam that the black block in Fig. 2 b is represented be mapped to beam set b0, B1, b2, b3 } in can obtain：B0=(0,0), b1=(0,1), b2=(1,0), b3=(1,1).
In another embodiment, the mapping ruler can also be included according to predetermined/random suitable Sequence maps in the wave beam in the subset of the wave beam in wave beam grid or the wave beam grid To the beam set.In one embodiment predetermined/random order can anaplasia at any time Change.
In the same manner, above-mentioned mapping ruler can also be applied to the configuration 3 in Fig. 2 c.Such case Under, the preferential mapping ruler of the first dimension can be expressed as, for example:
Wherein q=L1'/L1.The wave beam for representing the black block in Fig. 2 c according to the mapping ruler maps Can obtain in beam set { b0, b1, b2, b3 }：B0=(0,0), b1=(2,0), b2=(1,1), B3=(3,1).
If the preferential mapping ruler of the second dimension is quoted to configuration 3, such as：
B0=(0,0), b1=(1,1), b2=(2,0), b3=(3,1) can then be obtained.
For the configuration 4 shown in Fig. 2 d, for example can be using mapping ruler once：
Thus b0=(0,0), b1=(1,0), b2=(2,0), b3=(3,0) are obtained.
In another embodiment, it is also possible to carrying out column selection using configuration 3 or configuration 4 The subset of the wave beam grid after selecting is mapped according to predetermined or random order.
As skilled in the art will understand, embodiment of the disclosure is not limited to any spy Fixed mapping ruler and order.
In one embodiment, the method may further include：In block S311, to equipment Send long-term precoding configuration information, the long-term precoding configuration information is used for from described the The first wave beam group that beam selection obtains compressing is carried out in one wave beam group, and from described second The second wave beam group that beam selection obtains compressing is carried out in wave beam group；The of wherein described compression One wave beam group and the second wave beam group of the compression constitute the subset of the wave beam grid.
In another embodiment, be used to be mapped to the institute of the wave beam grid of beam set Stating subset can also not rely on the long-term precoding configuration information sent in block S311, but Obtain by other means.E.g. rule is selected to use what is chosen in wave beam grid by predetermined.
In yet another embodiment, the method can also include：In block S312, set to described Preparation send mapping configuration, and the mapping configuration is indicated for by the wave beam grid In wave beam or the wave beam grid the subset in wave beam be mapped to the beam collection The mapping ruler of conjunction.For example, the mapping configuration can indicate using the first dimension it is preferential, A kind of mapping ruler of second dimension preferentially and in predefined procedure/random order mapping, and/ Or, the mapping configuration also can indicate that suitable for determining the mapping of predetermined/Random Maps The parameter of sequence.
In another embodiment, the mapping ruler can be predetermined, without setting Transmitted by signaling between standby.
In certain embodiments, phase is also included in the short-term precoding information that block S302 is received Position adjustment information, for indicating the phase adjustment between different antennae polarization, such as combines (10) Described in formula.
The disclosure it was recognized by the inventor that therefrom select wave beam beam set size not May be different in the case of with configuration.For example, when long-term row different in application such as Fig. 2 a-2d During option and installment, the numbers of beams in the 2 dimension wave beam grids chosen is different, causes to reflect The size of the beam set being mapped to is also different.Therefore, disclosure proposition, for different ripples Beam set sizes, it is possible to use the index of different length indicating the wave beam of selection, to save Signaling consumption.For example, when long-term column selection being carried out for the configuration 1 shown in Fig. 2 a, only One wave beam is selected.In this case, will no longer be required to bit is used for the instruction of wave beam, And only need to indicate the phase adjustment between different antennae polarization.Therefore, in one embodiment In, short-term code book can have following form：
Therefore, in one embodiment, when the index not needed or needs are shorter indicates wave beam choosing When selecting, the bit for indicating phase adjustment information can be increased, that is to say, that phase place is adjusted The length of whole information can depend on the numbers of beams included by beam set.This can not increase Ensure better performance in the case of the feedback load of totalling.
In one embodiment, when the beam set only includes single wave beam, phase place is adjusted The length of whole information can be more than the phase adjustment letter when the beam set includes multiple wave beams The length of breath.In another embodiment, (the example when the beam set only includes single wave beam Such as, when the configuration 1 of application drawing 2a), for indicate beam selection one-dimensional index extremely Few a part of bit can be used for the phase adjustment information.The example embodiment makes it possible to Wave beam indication bit is enough reused to indicate phase adjustment, so that utilizing for feedback load is imitated Rate is higher.For example, in the design of existing design short-term code book feedback, it is possible to use 1 ratio Spy to indicate phase adjustment, i.e. (10) formula in n can be with value as 0 or 1；And according to One embodiment, it is possible to use indicate the bit of k originally further to indicate n, so that N can be extended to, for example, 2 bits, i.e. n ∈ { 0,1,2,3 }, i.e. phase adjustment can be with From 4 it is alternative in selected.
When configuration 2-4 of the application as shown in Fig. 2 b-2d carries out long-term column selection, can not weigh With the bit for indicating k, for example, W2Still there is the form shown in (10) formula.Therefore, For indicating that the implication of the bit of k can change with different configurations, it is ensured that feedback load Flexible utilization.
In one embodiment, it is assumed that short-term code book can be by W in reuse LTE Rel-102 Existing design constructed.The disclosure inventors realized that, by W2In phase place adjust Integral divisor can only ensure that two wave beams are orthogonal, that is to say, that for the transmission more than 2 Order, when needing to select more than two wave beam, selected some wave beams should be inherently Mutually orthogonal, to ensure good MIMO performances.For example, for transmission rank be 3 or The situation of person 4, at least 2 wave beams need to be orthogonal in selected wave beam；And for Order is 5 or 6 situation, and at least 3 wave beams should be mutually just in selected wave beam Hand over；When order is 7 or 8, at least 4 wave beams should in selected wave beam This is mutually orthogonal.Due to Jing W2The wave beam selected depends on long-term codebook design, because This, in some embodiments in the disclosure, it is also proposed that the criterion of long-term codebook design.
In one embodiment, indicated by the long-term precoding information for being received in block S301 The first wave beam group at least N number of wave beam be mutually orthogonal directions, and in the second wave beam group At least N number of wave beam be mutually orthogonal directions, wherein N is positive integer, and N is wave beam Need determined by transmission rank to keep orthogonal minimum numbers of beams in group.For example, N can be with It is set toWherein R represents transmission rank.
In one embodiment, can be directed to every kind of long-term (such as shown in Fig. 2 a-2d) Column selection configuration ensures to have minimum number in wave beam group to design specific long-term code book Purpose orthogonal beams (orthogonal columns).For example, for the codebook design that transmission rank is 3 or 4, Can be byLimit as follows:
In this case, across any W for different orders of the second dimension2Design column selection can Ensure orthogonality (such as configuration 2,3,4).Alternatively or additionally, can be by Design is as follows：
In this case, across any W for different orders of the first dimension2Design column selection utilizes 2 Individual beam separation ensure that orthogonality (such as configuration 3,4).This design for example may be used For the situation that transmission rank is 3 or 4.
In another embodiment, can arrange so that Xi,jIn all wave beams be it is orthogonal 's.For example, the first wave beam group indicated by the long-term precoding information for receiving in block S301 Can be designed with the second wave beam group as follows：
For N1=4, N2=2, o1=8, o2=4, L1'=4, L2'=2, L1=2, L2=2 situation, can obtain Arrive：
Which kind of in this case, no matter configured using long-term column selection, W2It is selected go out wave beam all Can ensure that it is orthogonal.
As skilled in the art will understand, it is given above the wave beam of long-term code book just Design is handed over only to be exemplary, the disclosure is not limited to any specific wave beam orthogonal design.
In addition, it is to be noted that in certain embodiments, the long-term code book of the disclosure Wave beam orthogonal design can be carried out independently of the simplified feedback method of short-term code book.This meaning , even if using different from the mapping of above-described wave beam and short-term precoding information feedback side Method, the wave beam orthogonal design of long-term code book can also be used.
With reference now to Fig. 4, it is illustrated in accordance with an embodiment of the present disclosure in cordless communication network (example Such as network 100) in for MIMO communications method 400 flow chart.The method 400 It is corresponding with method 300, and can be performed by the recipient of MIMO.For example, under Can be performed by the UE 102 in Fig. 1 a in the case of row MIMO, or up Performed by the eNB 101 in Fig. 1 a in the case of MIMO.And the method can also be used In the network of non-cellular, such as device-to-device communication wherein the sender of MIMO and connects Debit may each be user equipment.Only as an example, in the following description, the method by UE is performed.
As shown in figure 4, the method 400 includes：At block S401, to equipment (such as base Stand and 101) send the long-term precoding information communicated for the MIMO, it is described long-term pre- First wave beam group of the coding information indicator to the first dimension, and for the of the second dimension Two wave beam groups, second dimension is different from first dimension；Wherein, the first wave beam group With the second wave beam group constitute 2 dimension wave beam grids, and the wave beam in the wave beam grid or Wave beam in the subset of the wave beam grid is mapped to beam set according to mapping ruler； Block S402, to the equipment short-term precoding information for MIMO communications is sent, described Short-term precoding information includes one-dimensional index, and the index is used to indicate from the beam collection The wave beam selected in conjunction；And at block S403, receive Jing MIMO from the equipment and prelist The data of code.
Because method 400 is the method at MIMO receiving terminals corresponding with method 300, Therefore, the long-term precoding information and short-term for being sent at block S401 and block S402 prelists The long-term precoding information received at block S301 and block S302 in code information and method 300 And short-term precoding information can be identical, therefore, will not be described here.For example, The short-term precoding information sent at block S402 can be indicated from the beam set Jing after mapping The wave beam of middle selection.The mapping makes it possible to reuse existing short-term code book in LTE Rel-10 Design, simplifies the feedback of short-term precoding information.With regard to mapping ruler, above Associated methods 300 are described, and here is not repeating.
In one embodiment, method 400 may further include：At block S411, from The equipment receives long-term precoding configuration information, and the long-term precoding configuration information is used for The first wave beam group that beam selection obtains compressing, Yi Jicong are carried out from the first wave beam group The second wave beam group that beam selection obtains compressing is carried out in the second wave beam group；It is wherein described First wave beam group of compression and the second wave beam group of the compression constitute the institute of the wave beam grid State subset.
In another embodiment, method 400 may further include：At block S412, from The equipment receives mapping configuration, and the mapping configuration is indicated for by the ripple Wave beam in beam grid or the wave beam in the subset of the wave beam grid are mapped to described The mapping ruler of beam set.In another embodiment, mapping ruler can be it is predetermined, Without being indicated by signaling in equipment room.
In certain embodiments, phase is also included in the short-term precoding information that block S402 sends Position adjustment information, for indicating the phase adjustment between different antennae polarization.In view of therefrom Select the size of the beam set of wave beam possible different in the case of different configuration of, the disclosure Propose, for different beam set sizes, it is possible to use the index of different length is indicating The wave beam of selection, to save signaling consumption.Substituting or additional, in one embodiment In, when shorter index or need not be needed to indicate beam selection, can increase is used for Indicate the bit of phase adjustment information, that is to say, that the length of phase adjustment information can take Certainly in the numbers of beams included by beam set.This can be in the feelings for not increasing total feedback load Ensure better performance under condition.
In one embodiment, when the beam set only includes single wave beam, phase place is adjusted The length of whole information can be more than the phase adjustment letter when the beam set includes multiple wave beams The length of breath.In another embodiment, (the example when the beam set only includes single wave beam Such as, when the configuration 1 of application drawing 2a), in block S402 send for indicate from wave beam In the one-dimensional index of the wave beam selected in set, at least a portion bit could be used to indicate that Phase adjustment between different antennae polarization.The embodiment causes there is no need to carry out wave beam During instruction, indication bit or one part are used to indicate phase adjustment, improve feedback negative The utilization ratio of load.
In another embodiment, indicated by the long-term precoding information for sending in block S401 First wave beam group and the second wave beam group can be further configured so that Jing short-term codebook selectings The wave beam for going out is orthogonal.For example, at least N number of wave beam in the first wave beam group can be configured so that It is mutually orthogonal directions, and at least N number of wave beam in the second wave beam group can be configured so that and be Orthogonal, wherein N is positive integer, and N is determined by transmission rank in wave beam group Need keep orthogonal minimum numbers of beams.In one example, each wave beam group can be made In have minimal amount orthogonal beams number；In another embodiment, each wave beam can be made All wave beams in group are orthogonal.As skilled in the art will understand, the disclosure is not limited In any specific wave beam orthogonal design.
Fig. 5 illustrate in accordance with an embodiment of the present disclosure within a wireless communication network be used for multi input The exemplary block diagram of the device 500 of multi output MIMO communications.In one embodiment, Device 500 may be implemented as MIMO communication in sender (for example, eNB 101 or Person UE 102) or its a part.Device 500 can be used to perform and be retouched with reference to Fig. 3 The method 300 stated, and any other process and method.It should be appreciated that method 300 It is not limited to be performed by device 500, at least some block of method 300 can also be by other Device or entity performing.
As shown in figure 5, device 500 includes the first receptor 501, it is configured to from another set The standby long-term precoding information received for MIMO communications, the long-term precoding letter First wave beam group of the breath indicator to the first dimension, and for the second wave beam of the second dimension Group, second dimension is different from first dimension；Wherein, the first wave beam group and second Wave beam group constitutes the wave beam grid of 2 dimensions, and the wave beam or the ripple in the wave beam grid Wave beam in the subset of beam grid is mapped to beam set according to mapping ruler；Second receives Device 502, is configured to from the equipment receive the short-term precoding letter for MIMO communications Breath, the short-term precoding information includes one-dimensional index, and the index is used to indicate from institute State the wave beam selected in beam set；And first transmitter 503, it is configured to according to described Long-term precoding information and the short-term precoding information, to the equipment Jing MIMO are sent The data of precoding.
With regard to long-term precoding information, short-term precoding information, wave beam grid or wave beam net The subset of lattice is retouched above to the mapping ruler of beam set already in connection with Fig. 3-4 State, here is not repeated.
In one embodiment, device 500 can also include the second transmitter 511, for The equipment sends long-term precoding configuration information, and the long-term precoding configuration information is used for The first wave beam group that beam selection obtains compressing, Yi Jicong are carried out from the first wave beam group The second wave beam group that beam selection obtains compressing is carried out in the second wave beam group；It is wherein described First wave beam group of compression and the second wave beam group of the compression constitute the institute of the wave beam grid State subset.
In another embodiment, device 500 can also include the 3rd transmitter 512, for The equipment sends mapping configuration, and the mapping configuration is indicated for by the ripple Wave beam in beam grid or the wave beam in the subset of the wave beam grid are mapped to described The mapping ruler of beam set.
As described in above in association with method 300 and 400, in certain embodiments, second connects The short-term precoding information that receipts device is received can also include phase adjustment information, for indicating Phase adjustment between different antennae polarization, also, the length of the phase adjustment information takes Certainly in the numbers of beams included by the beam set.In one embodiment, in the wave beam When set only includes single wave beam, the length of phase adjustment information is more than in the beam set Including the length of phase place adjustment information during multiple wave beams.
In another embodiment, when the beam set only includes single wave beam, second connects Receive at least a portion bit of one-dimensional index in the short-term precoding information that received of device by with In phase adjustment information.
Additionally, or alternatively, in one embodiment, the first receptor 501 is connect Receive long-term precoding information indicated by the first wave beam group can be configured so that, it is therein extremely Few N number of wave beam is mutually orthogonal directions, and the second wave beam group can be configured so that, therein At least N number of wave beam is mutually orthogonal directions, and wherein N is positive integer, and N is wave beam group In need to keep orthogonal minimum numbers of beams determined by transmission rank.
Additionally, in certain embodiments, the first wave beam group and the second wave beam group it is above-mentioned orthogonal Design can be carried out independently of any specific short-term precoding information feedback method.
As skilled in the art will understand, device 500 can also be included in Fig. 5 not Other units for illustrating.
Fig. 6 illustrate in accordance with an embodiment of the present disclosure within a wireless communication network be used for multi input The exemplary block diagram of the device 600 of multi output MIMO communications.In one embodiment, Device 600 may be implemented as MIMO communication in recipient (for example, eNB 101 or Person UE 102) or its a part, and MIMO communications can be carried out with device 500. Device 600 can be used to perform the method 400 with reference to described by Fig. 4, and any other Process and method.It should be appreciated that method 400 is not limited to be performed by device 600, At least some block of method 400 can also be performed by other devices or entity.
As shown in fig. 6, device 600 includes the first transmitter 601, it is configured to equipment Send the long-term precoding information for MIMO communications, the long-term precoding information First wave beam group of the indicator to the first dimension, and for the second wave beam group of the second dimension, Second dimension is different from first dimension；Wherein, the first wave beam group and the second wave beam Group constitutes the wave beam grid of 2 dimensions, and the wave beam in the wave beam grid or the wave beam net Wave beam in the subset of lattice is mapped to beam set according to mapping ruler；Second transmitter 602, it is configured to be sent to the equipment short-term precoding information communicated for MIMO, The short-term precoding information includes one-dimensional index, and the index is used to indicate from the ripple The wave beam that constriction is selected in closing；And first receptor 603, it is configured to from the equipment connect Receive the data of Jing MIMO precodings.
Because device 600 can be used to execution with reference to the method 400 described by Fig. 4, and with Device 500 communicates, accordingly, with respect to method 300,400 carried out with regard to long-term precoding Information, short-term precoding information, wave beam grid or its subset to the mapping of beam set is advised Description here then is equally applicable, and is not repeated.
In one embodiment, device 600 can further include the second receptor 611, It is configured to receive long-term precoding configuration information from the equipment, the long-term precoding is matched somebody with somebody Confidence ceases the first wave beam compressed for carrying out beam selection to obtain from the first wave beam group Group, and the second wave beam group that beam selection obtains compressing is carried out from the second wave beam group； First wave beam group of wherein described compression and the second wave beam group of the compression constitute the wave beam The subset of grid.
Substituting or additionally, in one embodiment, device 600 can also further Including the 3rd receptor 612, it is configured to receive mapping configuration from the equipment, it is described Mapping configuration is indicated for by the wave beam in the wave beam grid or the wave beam grid The subset in wave beam be mapped to the mapping ruler of the beam set.
As skilled in the art will understand, device 500,600 can also include respectively Fig. 5, other units not shown in 6.
The advantage of the method and apparatus that embodiment of the disclosure is proposed includes following at least one ：
- feedback of short-term precoding information for 3D MIMO can be simplified；
The utilization ratio of-raising feedback information；
The orthogonality of the selected wave beam of-guarantee；
- realize the improvement of 3D-MIMO systematic functions.
It will be readily appreciated by those skilled in the art that block in various above-mentioned various methods or Person's step can be performed by the computer for programming.In the disclosure, some embodiments are also Program storage device is intended to, for example, digital data storage medium, this is machine or meter Calculation machine is readable and encoding machine can perform or the executable instruction repertorie of computer, wherein, The instruction performs some or all of steps of said method.Program storage device can be, For example, digital memory, the magnetic storage medium of such as Disk and tape, hard disk drive or Optical readable digital data storage medium.The embodiment be also intended to cover be programmed to carry out it is described The computer of the step of said method.Some embodiments are also intended to cover a kind of device, the dress Put including at least one processor；And at least one include computer program code storage Device, wherein at least one memorizer and the computer program code are configured to：With At least one processor together, promotes described device to perform method 300 or 400.
The function of the various elements of the device being shown in the drawings, can by using software, Specialized hardware and the hardware or firmware that are able to carry out software that are associated with appropriate software, Or it combines to provide.When provided by a processor, the function can be by single special Manage device, provide by single shared processor or by multiple single processors.Additionally, art Language " processor " can including but not limited to, digital signal processor (DSP) hardware, net Network processor, special IC (ASIC), field programmable gate array (FPGA), use In the storage read only memory (ROM) of software, random access memory (RAM) and non- Volatile storage.Other conventional and/or customization hardware can also be included.
It will be appreciated by those skilled in the art that specification and drawings are merely illustrative the original of the disclosure Reason.It will thus be appreciated that those skilled in the art is possible to design various arrangements, Although clearly not describing here or illustrating, the arrangement embodies the principle of the disclosure simultaneously And be included in spirit and scope of the present disclosure.Additionally, all example masters for illustrating here Main idea is clearly being only used for teaching purpose, to help reader to understand principle and the invention of the disclosure The concept for promoting this area of people's contribution, and it is concrete to be to be construed as being without limitation of these The example and condition of explaination.And, principle, aspect and the embodiment of the disclosure are illustrated here Be described and its specific example is also intended to comprising its equivalent.

Claims (32)

1. it is a kind of for multiple-input and multiple-output MIMO communication method, including：
The long-term precoding information for MIMO communications is received from equipment, it is described long-term First wave beam group of the precoding information indicator to the first dimension, and for the second dimension Second wave beam group, second dimension is different from first dimension；Wherein, described first Wave beam group and the second wave beam group constitute the wave beam grid of 2 dimensions, and the wave beam grid In wave beam or the wave beam grid subset in wave beam be mapped to according to mapping ruler Beam set；
The short-term precoding information for MIMO communications is received from the equipment, it is described Short-term precoding information includes one-dimensional index, and the index is used to indicate from the beam collection The wave beam selected in conjunction；
According to the long-term precoding information and the short-term precoding information, to the equipment Send the data of Jing MIMO precodings.
2. method according to claim 1, wherein the mapping ruler include it is following in At least one：
According to the preferential order of the first dimension by the wave beam in wave beam grid or the wave beam net Wave beam in the subset of lattice is mapped to the beam set；
According to the preferential order of the second dimension by the wave beam or the ripple in the wave beam grid Wave beam in the subset of beam grid is mapped to the beam set；
According to random order by the wave beam in the wave beam grid or the wave beam grid Wave beam in the subset is mapped to the beam set；And
In a predetermined sequence by the wave beam in the wave beam grid or the wave beam grid Wave beam in the subset is mapped to the beam set.
3. method according to claim 1, further includes：
Long-term precoding configuration information is sent to the equipment, the long-term precoding matches somebody with somebody confidence The the first wave beam group compressed for carrying out beam selection to obtain from the first wave beam group is ceased, And carry out from the second wave beam group beam selection obtain compress the second wave beam group；Its Described in the first wave beam group for compressing and the second wave beam group of the compression constitute the wave beam net The subset of lattice.
4. method according to claim 1, further includes：
To equipment transmission mapping configuration, reflect described in the mapping configuration instruction Penetrate rule.
5. the method according to any claim in claim 1 to 4, wherein：
The short-term precoding information also includes phase adjustment information, for indicating different antennae Phase adjustment between polarization, also,
The length of the phase adjustment information depends on the wave beam included by the beam set Number.
6. method according to claim 5, wherein only including in the beam set single During individual wave beam, the length of phase adjustment information is more than and includes multiple wave beams in the beam set The length of Shi Xiangwei adjustment information.
7. method according to claim 5, wherein：
When the beam set only includes single wave beam, at least the one of the one-dimensional index Partial bit is used for the phase adjustment information.
8. the method according to any claim in claim 1 to 4, wherein：
At least N number of wave beam in the first wave beam group is mutually orthogonal directions, and
At least N number of wave beam in the second wave beam group is mutually orthogonal directions,
Wherein N is positive integer, and N is to need determined by transmission rank to protect in wave beam group Hold orthogonal minimum numbers of beams.
9. it is a kind of for multiple-input and multiple-output MIMO communication method, including：
The long-term precoding information for MIMO communications is sent to equipment, it is described long-term First wave beam group of the precoding information indicator to the first dimension, and for the second dimension Second wave beam group, second dimension is different from first dimension；Wherein, described first Wave beam group and the second wave beam group constitute the wave beam grid of 2 dimensions, and the wave beam grid In wave beam or the wave beam grid subset in wave beam be mapped to according to mapping ruler Beam set；
The short-term precoding information for MIMO communications is sent to the equipment, it is described Short-term precoding information includes one-dimensional index, and the index is used to indicate from the beam collection The wave beam selected in conjunction；
The data of Jing MIMO precodings are received from the equipment.
10. method according to claim 9, wherein the mapping ruler include it is following At least one of：
According to the preferential order of the first dimension by the wave beam in wave beam grid or the wave beam net Wave beam in the subset of lattice is mapped to the beam set；
According to the preferential order of the second dimension by the wave beam or the ripple in the wave beam grid Wave beam in the subset of beam grid is mapped to the beam set；
According to random order by the wave beam in the wave beam grid or the wave beam grid Wave beam in the subset is mapped to the beam set；And
In a predetermined sequence by the wave beam in the wave beam grid or the wave beam grid Wave beam in the subset is mapped to the beam set.
11. methods according to claim 9, further include：
Long-term precoding configuration information is received from the equipment, the long-term precoding matches somebody with somebody confidence The the first wave beam group compressed for carrying out beam selection to obtain from the first wave beam group is ceased, And carry out from the second wave beam group beam selection obtain compress the second wave beam group；Its Described in the first wave beam group for compressing and the second wave beam group of the compression constitute the wave beam net The subset of lattice.
12. methods according to claim 9, further include：
From equipment reception mapping configuration, reflect described in the mapping configuration instruction Penetrate rule.
13. methods according to any claim in claim 9 to 12, wherein：
The short-term precoding information also includes phase adjustment information, for indicating different antennae Phase adjustment between polarization, also,
The length of the phase adjustment information depends on the wave beam included by the beam set Number.
14. methods according to claim 13, wherein only including in the beam set During single wave beam, the length of phase adjustment information is more than and includes multiple ripples in the beam set The length of phase place adjustment information during beam.
15. methods according to claim 13, wherein：
When the beam set only includes single wave beam, at least the one of the one-dimensional index Partial bit is used for the phase adjustment information.
16. methods according to any claim in claim 9 to 12, wherein：
At least N number of wave beam in the first wave beam group is mutually orthogonal directions, and
At least N number of wave beam in the second wave beam group is mutually orthogonal directions,
Wherein N is positive integer, and N is to need determined by transmission rank to protect in wave beam group Hold orthogonal minimum numbers of beams.
A kind of 17. devices for multiple-input and multiple-output MIMO communications, including：
First receptor, is configured to from equipment receive for the long-term of MIMO communications Precoding information, first wave beam group of the long-term precoding information indicator to the first dimension, And for the second wave beam group of the second dimension, second dimension is different from the described first dimension Degree；Wherein, the first wave beam group and the second wave beam group constitute the wave beam grid of 2 dimensions, And the wave beam in the subset of the wave beam in the wave beam grid or the wave beam grid is pressed Beam set is mapped to according to mapping ruler；
Second receptor, is configured to from the equipment receive for MIMO communications Short-term precoding information, the short-term precoding information includes one-dimensional index, the index For the wave beam for indicating to be selected from the beam set；
First transmitter, is configured to pre- according to the long-term precoding information and the short-term Coding information, to the equipment data of Jing MIMO precodings are sent.
18. devices according to claim 17, wherein the mapping ruler is including following At least one of：
According to the preferential order of the first dimension by the wave beam in wave beam grid or the wave beam net Wave beam in the subset of lattice is mapped to the beam set；
According to the preferential order of the second dimension by the wave beam or the ripple in the wave beam grid Wave beam in the subset of beam grid is mapped to the beam set；
According to random order by the wave beam in the wave beam grid or the wave beam grid Wave beam in the subset is mapped to the beam set；And
In a predetermined sequence by the wave beam in the wave beam grid or the wave beam grid Wave beam in the subset is mapped to the beam set.
19. devices according to claim 17, further include：
Second transmitter, is configured to send long-term precoding configuration information to the equipment, The long-term precoding configuration information is obtained for carrying out beam selection from the first wave beam group To the first wave beam group of compression, and carry out beam selection from the second wave beam group and obtain Second wave beam group of compression；First wave beam group of wherein described compression and the second of the compression Wave beam group constitutes the subset of the wave beam grid.
20. devices according to claim 17, further include：
3rd transmitter, is configured to send mapping configuration to the equipment, described to reflect Penetrate configuration information and indicate the mapping ruler.
21. devices according to any claim in claim 17 to 20, wherein：
The short-term precoding information also includes phase adjustment information, for indicating different antennae Phase adjustment between polarization, also,
The length of the phase adjustment information depends on the numbers of beams included by the beam set Mesh.
22. devices according to claim 21, wherein only including in the beam set During single wave beam, the length of phase adjustment information is more than and includes multiple ripples in the beam set The length of phase place adjustment information during beam.
23. devices according to claim 21, wherein：
When the beam set only includes single wave beam, at least the one of the one-dimensional index Partial bit is used for the phase adjustment information.
24. devices according to any claim in claim 17 to 20, wherein：
At least N number of wave beam in the first wave beam group is mutually orthogonal directions, and
At least N number of wave beam in the second wave beam group is mutually orthogonal directions,
Wherein N is positive integer, and N is to need determined by transmission rank to protect in wave beam group Hold orthogonal minimum numbers of beams.
A kind of 25. devices for multiple-input and multiple-output MIMO communications, including：
First transmitter, is configured to be sent for the long-term of MIMO communications to equipment Precoding information, first wave beam group of the long-term precoding information indicator to the first dimension, And for the second wave beam group of the second dimension, second dimension is different from the described first dimension Degree；Wherein, the first wave beam group and the second wave beam group constitute the wave beam grid of 2 dimensions, And the wave beam in the subset of the wave beam in the wave beam grid or the wave beam grid is pressed Beam set is mapped to according to mapping ruler；
Second transmitter, is configured to be sent for MIMO communications to the equipment Short-term precoding information, the short-term precoding information includes one-dimensional index, the index For the wave beam for indicating to be selected from the beam set；
First receptor, is configured to from the equipment receive the data of Jing MIMO precodings.
26. devices according to claim 25, wherein the mapping ruler is including following At least one of：
According to the preferential order of the first dimension by the wave beam in wave beam grid or the wave beam net Wave beam in the subset of lattice is mapped to the beam set；
According to the preferential order of the second dimension by the wave beam or the ripple in the wave beam grid Wave beam in the subset of beam grid is mapped to the beam set；
According to random order by the wave beam in the wave beam grid or the wave beam grid Wave beam in the subset is mapped to the beam set；And
In a predetermined sequence by the wave beam in the wave beam grid or the wave beam grid Wave beam in the subset is mapped to the beam set.
27. devices according to claim 25, further include：
Second receptor, is configured to receive long-term precoding configuration information from the equipment, The long-term precoding configuration information is obtained for carrying out beam selection from the first wave beam group To the first wave beam group of compression, and carry out beam selection from the second wave beam group and obtain Second wave beam group of compression；First wave beam group of wherein described compression and the second of the compression Wave beam group constitutes the subset of the wave beam grid.
28. devices according to claim 25, further include：
3rd receptor, is configured to receive mapping configuration from the equipment, described to reflect Penetrate configuration information and indicate the mapping ruler.
29. devices according to any claim in claim 25 to 28, wherein：
The short-term precoding information also includes phase adjustment information, for indicating different antennae Phase adjustment between polarization, also,
The length of the phase adjustment information depends on the numbers of beams included by the beam set Mesh.
30. devices according to claim 29, wherein only including in the beam set During single wave beam, the length of phase adjustment information is more than and includes multiple ripples in the beam set The length of phase place adjustment information during beam.
31. devices according to claim 29, wherein：
When the beam set only includes single wave beam, at least the one of the one-dimensional index Partial bit is used for the phase adjustment information.
32. devices according to any claim in claim 25 to 28, wherein：
At least N number of wave beam in the first wave beam group is mutually orthogonal directions, and
At least N number of wave beam in the second wave beam group is mutually orthogonal directions,
Wherein N is positive integer, and N is to need determined by transmission rank to protect in wave beam group Hold orthogonal minimum numbers of beams.
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