CN106685582A

CN106685582A - CSI feedback and codebook configuration signaling configuration method and device

Info

Publication number: CN106685582A
Application number: CN201510752939.8A
Authority: CN
Inventors: 肖华华; 陈艺戬; 李儒岳; 蔡剑兴; 李永; 吴昊; 王瑜新; 鲁照华
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-11-06
Filing date: 2015-11-06
Publication date: 2017-05-17
Also published as: WO2017076323A1

Abstract

The invention provides a CSI feedback and codebook configuration signaling configuration method and device. The feedback method comprises the steps that: a terminal obtains a channel state information reference signal CSI-RS; a terminal measures the CSI-RS to obtain channel matrix information; the terminal determines the code word of channel state information feedback type AClass A according to the channel matrix information; and the CSI is fed according to the determined code word.

Description

The feedback of CSI, the collocation method of codebook configuration signaling and device

Technical field

The present invention relates to the communications field, in particular to a kind of feedback of CSI, the collocation method of codebook configuration signaling and device.

Background technology

In wireless communication system, transmitting terminal and receiving terminal typically can send and receive to obtain higher speed using many antennas.One principle of multi-antenna technology is some features using channel forming the multilayer transmission of match channels feature, the radiation direction of signal is very targeted, being capable of effective lift system performance, significant performance boost is just obtained on the basis of bandwidth and power is not increased, it is a very promising technology, extensively applies in current system.The data transmission performance quality of multiaerial system depends primarily on measurement and the feedback of channel information.Therefore the measurement of channel information and feedback are the core contents of multi-antenna technology；How the degree of accuracy of channel measurement and feedback of channel information is ensured, expense, robustness become a major issue.

The measurement of CSI (channel state information) and feedback are that obtaining for design is fairly simple in LTE (Long TermEvolution) system version of early stage, but with required precision more and more higher, and pilot-frequency expense and feedback overhead and quantization complexity are not intended to show a marked increase, therefore the measurement of CSI and feedback technique become to become increasingly complex, to pursue higher quantitative efficiency；Additionally, due to needing to be directed to various different scenes, well adapting to property of antenna configuration, substantial amounts of new design is have also been introduced.Some are described below and quantify the related substance of feedback to CSI：

CSI (RI/PMI/CQI) feedback content

Information feedback includes：Channel quality indication (CQI) information (Channel quality indication, referred to as CQI), precoding matrix indicators (Precoding Matrix Indicator, referred to as PMI) and order designator (Rank Indicator, referred to as RI).CQI is an index for weighing down channel quality quality.CQI is represented with 0～15 integer value in 36-213 agreements, and different CQI grades are represented respectively, and different CQI correspond to respective modulation system and encoder bit rate (MCS).RI is used to describe the number of space independent channel, the order of respective channels response matrix.Under Open-Loop Spatial Multiplexing and Closed-Loop Spatial Multiplexing pattern, need UE to feed back RI information, RI information need not be fed back under other patterns.The sum of ranks number of plies correspondence of channel matrix.PMI feedbacks are optimal precoding informations, based on index feedback, the code word of the feature of present channel are most matched in the code book for indicating agreement.Standard is supported to configure the code book that each UE is used by code book limitation function (Codebook Subset Restriction).

Two kinds of feedback systems of CSI (PUCCH and PUSCH)

The feedback of terminal CSI is primarily present two ways：Base station can be measured to channel information with configurating terminal and be quantified, and the CSI information (including RI/PMI/CQI) for quantifying periodically is fed back by Physical Uplink Control Channel Physical Uplink Control Channel (PUCCH).Base station can also when needed, and acyclic unexpected triggering terminal carries out reporting for CSI information (including RI/PMI/CQI), its main physically row shared channel Physical Uplink Shared CHannel (PUSCH).To overcome periodic feedback real-time not high enough, CSI quantified precisions are limited to the problem of control channel expense

Feedback classification：

The measurement of channel information and the classification of feedback have two kinds：Respectively information feedback type A (Class A) and information feedback type B (Class B)

Class A：Base station sends CSI-RS, generally non-precoded pilot tone, and UE directly carries out channel measurement based on the CSI-RS and CSI quantifies, and obtains RI/PMI/CQI.These contents are fed back on PUCCH or PUSCH, feedback content is more, included the beam direction in broadband

Class B：The CSI-RS that base station sends, generally precoded pilot, UE may need the selection for first carrying out precoded pilot, or the resource set of precoded pilot are selected, or port group selection, then the quantization for carrying out channel information based on the subset of selection again is fed back, including subset selects information, and the corresponding RI/PMI/CQI information of CSI-RS measurements subset of resources for selecting；

Code book feedback is introduced

Channel information based on code book quantifies the general principle of feedback and is briefly described below：Assume that Limited Feedback channel capacity is B bps/Hz, then the number of available code word is N=2^BIt is individual.The space of feature vectors of channel matrix constitutes codebook space through quantifyingTransmitting terminal preserves or produces in real time this code book jointly with receiving terminal(transmitting terminal is identical with receiving end is received).H is realized to every secondary channel, receiving terminal is according to certain criterion from codebook spaceMiddle selection one realizes the code word that H is most matched with channelAnd by the code wordSequence number i (code word sequence number) feed back to transmitting terminal.Here, code word sequence is known as the precoding matrix indicators (Precoding Matrix Indicator, referred to as PMI) in code book.Transmitting terminal finds corresponding pre-encoding codeword according to this sequence number iSo as to also obtain corresponding channel information,Illustrate the characteristic vector information of channel.Here channel channel H is usually to carry out channel measurement acquisition according to channel measurement pilot frequency.

In general codebook spaceThe corresponding code books of multiple Rank can be further divided into, multiple code words can be corresponded under each Rank to quantify the pre-coding matrix that the Rank lower channels characteristic vector is constituted.Because the Rank and non-zero characteristics vector number of channel are equal, therefore, code word can all have N to arrange when in general Rank is N.So, codebook spaceMultiple sub-codebooks can be divided into by the difference of Rank, as shown in table 1.

Table 1, code book presses Rank point for the signal of multiple sub-codebooks

Wherein, in Rank>The code word that storage is needed when 1 is all matrix form, and the wherein code book in LTE protocol is exactly the feedback method of this codebook quantification for adopting, as precoding codebook is meant that with channel information quantization codebook in actually LTE.Hereinafter, for the sake of unification, vector can also regard the matrix that dimension is 1 as.

There may be many set code books selective carrying out different accuracy, the quantization of different scenes；

Long Term Evolution Long Term Evolution (LTE) code book introductions

The code book of LTE is with the evolution of Standard Edition, also in continuous evolution, the form of code book all only one of which PMI of the code book of 4 antennas and 2 antennas in version Release 8 and Release 9, Release 10 8 antenna codebooks and Release 12 4 antenna codebook when, it is exactly the form of this feedback of dicode, i.e. code word can be write as the form of W=W1*W2, and W1 is the code book of long-term feedback, typically there is N1 group, each group includes M1 alternative wave beam, user selects the one kind in N1 group to feed back to base station, base station obtains group index information, this feedback is typically quantified and is fed back with PMI1；W2 represents the code book of a short-term feedback, its effect is one or more in W1 code words in the alternative wave beam of selection M1, and the wave beam that each polarised direction of same data Layer is selected is identical, and the port for different polarised directions selects polarization phases Co-phasing.Each code word in W2 is quantified with PMI2.

In designing in the code book of Release 13, because the dimension for having used more antennas, code book becomes much larger.The topology of antenna is typically also planar array, that is, the antenna for having two dimension directions.So as to each wave beam in code word W 1 has the form of the dimension of form 2Wherein, v_mAnd u_nThe discrete fourier vector of respectively the first dimension and the second dimension, m=1,2 ..., N₁₁, n=1,2 ..., N₁₂。Represent v_mAnd u_nKronecker products, first dimension has N1 port (in the present invention, port includes that antenna/port/ ports/transmission unit/a period of time/array element etc. can be with the device of sending signal), second dimension has N1 port, the port of the first dimension has carried out O1 times of over-sampling, the port of the second dimension has carried out O2 times of over-sampling, so as to the number of the discrete fourier vector for having oversample factor to be first dimension or the second dimension antenna is the multiple of port number, so have N11=N1*O1, N11=N2*O2.The code book of first dimension of W1 is represented with PMI11, and the code book of second dimension is represented with PMI12.For the index of above-mentioned each PMI11 and PMI12, there is M1 W2 code word, each W2 code word is exactly to select 2 to tie up wave beam from W1And the Co-phasing of different polarised directions, corresponding codewords indexes are PMI2.Due to PMI11, the bit numbers sum of the feedback of PMI12 and PMI2 is typically than larger, feedback overhead is big, user selects the complexity of code book high, in order to solve this problem, by the way that M1 code word in W2 is divided into the configuration of K kinds, every kind of configuration includes that a codebook subset in M1 code word is closed to normal structure, such as one of configuration set is as shown in the table, i ' here₂That is a specific index in PMI2.As can be seen that each config is a subset in 32 code words closing.The order of this configuration typically has high-level signaling codebook subset conjunction option and installment signaling (Codebook-Subset-SelectionConfig) to be allocated to user, the signaling includes 4 kinds of possible values, respectively Config1, Config2, Config3, Config4, for all Rank of the user set up, i.e. for all of rank, all of feedback kind, the code book for having various configurations, codebook design is too complicated.

For the code book of above-mentioned Class A, when channel sequence is more than 2, in order to find two orthogonal beam vectors B_m,nAnd B_m',n', there is the combined method of various orthogonal beams pair.The combination configured in prior art is more, too complicated, and is possible to bring the value under some antenna ports to be invalid.

In addition, on the one hand, start the feedback kind for Class B occur in the version of Release 13, such CSI-RS pilot tones have precoding, the code word fed back in its CSI can continue to use traditional code word, that is the code word of Release8～Release12, but traditional code word is primarily directed to linear homogeneous antenna array design, the code book of design is generally discrete fourier vector, unsuitable for the channel after precoding, because the superposition of the channel of the multiple antennas of channel or port after precoding, no longer meet the structure of linear homogeneous aerial array, and traditional code word is all permanent mould, and the precoding vector (matrix) added by the CSI-RS pilot tones of Class B typically has obvious directionality, permanent mould code book can not be well matched with the channel of Class B, so as to the performance that simply precoded pilot system can not be effectively played with existing codebook configuration.

In prior art, codebook configuration is more complicated when Class A, and the channel information optimization codebook configuration information that can not be met demand, need according to user's reality fairly simple when Class B.

The content of the invention

The invention provides a kind of feedback of CSI, the collocation method of codebook configuration signaling and device, at least to solve the inflexible problem of correlation technique signal deployment on the middle and senior level.

According to an aspect of the invention, there is provided a kind of collocation method of codebook configuration signaling, including：Terminal obtains channel state information reference signals CSI-RS；Terminal measures the CSI-RS and obtains channel matrix information；Terminal determines the code word of information feedback type A Class A according to the channel matrix information；And according to the codeword feedback CSI for determining.

According to an aspect of the invention, there is provided a kind of collocation method of codebook configuration signaling, including：Terminal obtains channel state information reference signals CSI-RS after precoding；Terminal measures the CSI-RS after the precoding and obtains channel matrix information；Terminal determines the code word of information feedback type B Class B according to the channel matrix information；And according to the codeword feedback channel condition information CSI for determining.

According to another aspect of the present invention, there is provided a kind of collocation method of codebook configuration signaling, including：Base station to terminal sends channel state information reference signals CSI-RS；The base station receives the channel condition information CSI that the terminal determines according to the CSI-RS, and determines the code word of information feedback type A Class A according to the channel condition information.

According to another aspect of the present invention, there is provided a kind of collocation method of codebook configuration signaling, including：Base station sends channel state information reference signals CSI-RS after precoding to terminal；The base station receives the channel condition information CSI that the terminal determines according to the CSI-RS, and determines the code word of information feedback type B Class B according to the channel condition information.

According to a further aspect in the invention, there is provided a kind of feedback device of channel condition information CSI, including：Acquisition module, for obtaining channel state information reference signals CSI-RS；Measurement module, for measuring the CSI-RS channel matrix information is obtained；Feedback module, for determining the code word of information feedback type AClass A according to the channel matrix information；And according to the codeword feedback CSI for determining.

According to a further aspect in the invention, there is provided a kind of feedback device of channel condition information CSI, including：Acquisition module, for obtaining precoding after channel state information reference signals CSI-RS；Measurement module, for measuring the precoding after CSI-RS obtain channel matrix information；Feedback module, for determining the code word of information feedback type B Class B according to the channel matrix information；And according to the codeword feedback channel condition information CSI for determining.

According to a further aspect in the invention, there is provided a kind of configuration device of codebook configuration signaling, including：Sending module, for sending channel state information reference signals CSI-RS to terminal；Receiver module, for receiving the channel condition information CSI that the terminal determines according to the CSI-RS, and determines the code word of information feedback type A Class A according to the channel condition information.

According to a further aspect in the invention, there is provided a kind of terminal, including：The feedback device of CSI.

According to a further aspect in the invention, there is provided a kind of base station, the configuration device of codebook configuration signaling.

By the present invention, using the technical scheme of the code word that Class A or ClassB are determined according to the channel matrix information in CSI-RS, the inflexible problem of correlation technique signal deployment on the middle and senior level is solved, and then reached the effect for configuring high-level signaling for user flexibility.

Description of the drawings

Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, and the schematic description and description of the present invention is used to explain the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：

Fig. 1 is the flow chart of the feedback method of channel condition information CSI according to embodiments of the present invention；

Fig. 2 is the flow chart of the feedback method of another channel condition information CSI according to embodiments of the present invention；

Fig. 3 is the flow chart of the collocation method of codebook configuration signaling according to embodiments of the present invention；

Fig. 4 is the flow chart of the collocation method of another codebook configuration signaling according to embodiments of the present invention；

Fig. 5 is the structured flowchart of the feedback device of channel condition information CSI according to embodiments of the present invention；

Fig. 6 is the structured flowchart of the feedback device of another channel condition information CSI according to embodiments of the present invention；

Fig. 7 is the structured flowchart of the configuration device of codebook configuration signaling according to embodiments of the present invention；

Fig. 8 is the structured flowchart of the configuration device of another codebook configuration signaling according to embodiments of the present invention.

Specific embodiment

Below with reference to accompanying drawing and in conjunction with the embodiments describing the present invention in detail.It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can be mutually combined.

It should be noted that description and claims of this specification and term " first ", " second " in above-mentioned accompanying drawing etc. are the objects for distinguishing similar, without being used to describe specific order or precedence.

In embodiments of the present invention, communication node includes base station or terminal, wherein, base station includes but is not limited to：The various Wireless Telecom Equipments such as macro base station, micro-base station, WAP.Terminal is included but is not limited to：The various Wireless Telecom Equipments such as the various terminals such as data card, mobile phone, notebook computer, PC, panel computer, personal digital assistant, bluetooth and relaying, remote device, WAP.

The concepts such as channel sequence is included but is not limited to, data transfer layer number, data transmission stream number, data flow number, data Layer number, channel Rank, RI, order.

Fig. 1 is the flow chart of the feedback method of channel condition information CSI according to embodiments of the present invention.As shown in figure 1, a kind of feedback method of channel condition information CSI includes：

Step S102, terminal obtains channel state information reference signals CSI-RS；

Step S104, terminal measures the CSI-RS and obtains channel matrix information；

Step S106, terminal determines the code word of information feedback type A Class A according to the channel matrix information, and according to the codeword feedback CSI for determining.

Alternatively, terminal determines the code word of information feedback type A Class A according to the channel matrix information, including：Terminal determines the rank information of channel according to channel matrix information, and channel sequence is grouped, and obtains order group；Determine the code word according to the order group, wherein, the order group is that N number of value of the order of the channel is divided into M group to obtain, and N and M is positive integer, and N is more than or equal to M.

Alternatively, the code word is determined according to the order group, including：Terminal determines that codebook subset closes the set of option and installment signaling and its corresponding value according to the order group, and the set of option and installment signaling and its code word of corresponding value determination Class A are closed according to described codebook subset.

In N=1 or 2, M=1；When N is more than 2, M=2 or M=3.

In an optional embodiment, the order group is determined by the first dimension port number N1, the second dimension port number N2, the first dimension oversample factor O1 and the second dimension oversample factor O2, the determination mode of the order group includes：Mode 1：N1=4, N2=2, O1=8, O2=4, order group 1 is { 1,2,3 }, and order group 2 is { 4 ..., N }, or order group 1 is { 1,2,3 }, and order group 2 is { 4 }, and order group 3 is { 5,6,7,8 }；Mode 2：N1=2, N2=4, O1=8, O2=4, order group 1 is { 1,2 }, and order group 2 is { 3,4 ..., N }, or, order group 1 is { 1,2 }, and order group 2 is { 3,4 }, and order group 3 is { 5,6,7,8 }.

The codebook subset closes the codebook subset of option and installment signaling and closes option and installment signaling set PA including A value, and A is the positive integer more than 1.

Alternatively, determine that codebook subset closes the set of option and installment signaling according to the order group, including：The a subset for closing option and installment signaling set PA from codebook subset is combined into PAi, subclass PAi includes the value number of Ai configuration signal, Ai is the positive integer less than or equal to A, the a subset of each channel sequence group correspondence code book Resource selection configuration signal set PA closes PAi, and subscript i is the positive integer less than or equal to M.

Alternatively, determine that codebook subset closes the value of option and installment signaling according to the order group, including：When M is 1, the value that the configuration signal is selected in whole components of option and installment signaling set PA is closed from codebook subset；When M is the positive integer more than 1, for i-th order group in M group, the value that the configuration signal is selected in the subclass PAi of option and installment signaling set PA is closed from codebook subset, the subclass PAi includes that Ai is worth, Ai is positive integer, i=1 ..., M.

Alternatively, determine that codebook subset closes the value of option and installment signaling and includes according to the order group：The mapping relations for closing the option and installment signaling set PA and subclass PAi according to codebook subset select the value of the configuration signal from the subclass PAi, wherein, the mapping relations are used to indicate the mapping relations that the codebook subset is closed between the component in the component and the subclass PAi of option and installment signaling set PA.

Alternatively, determine that codebook subset closes the value of option and installment signaling and includes according to the order group：

In M=2, for one of order group 1, the value that the configuration signal is selected in the subclass PA1 of option and installment signaling set PA is closed from the codebook subset；For one of order group 2, the value that the configuration signal is selected in the subclass PA2 of option and installment signaling set PA is closed from the codebook subset；

In M=3, for one of order group 1, the value that the configuration signal is selected in the subclass PA1 of option and installment signaling set PA is closed from the codebook subset；For one of order group 2, the value that the configuration signal is selected in the subclass PA2 of option and installment signaling set PA is closed from the codebook subset；For one of order group 3, the value that the configuration signal is selected in the subclass PA3 of option and installment signaling set PA is closed from the codebook subset；

Wherein, the subclass PA1 has A1 value, and subclass PA2 has A2 value, and the subclass PA3 has A3 value, and A3≤A2<A1, and A1=A.

Alternatively, in M=2, determine that codebook subset closes the value of option and installment signaling and includes according to the order group：For order group 1, the value that the mapping relations between the component in component and the PA1 in option and installment signaling set PA select the configuration signal is closed according to the codebook subset；For order group 2, the value that the mapping relations between the component in component and the PA2 in option and installment signaling set PA select the configuration signal is closed according to the codebook subset；

In M=3, determine that codebook subset closes the value of option and installment signaling and also includes according to the order group, for order group 3, the value that the mapping relations between the component in component and the PA3 in option and installment signaling set PA select the configuration signal is closed according to the codebook subset.

11. methods according to claim 7, it is characterized in that, from the codebook subset value of the configuration signal selected in the subclass PAi of option and installment signaling set PA is closed by the first dimension port number N1, the second dimension port number N2, the first dimension oversample factor O1, second dimension oversample factor O2 determines, wherein, i=1 ..., M, the value determination mode of the configuration signal includes：

Mode 1：It is that PA1 is { 1,2,3,4 } when N1=4, N2=2, O1=8, O2=4, PA2 is { 2,3,4 }, or is { 1,2,3,4 } for PA1, PA2 is { 2,3,4 }, and PA3 is { 3,4 }；

Mode 2：It is that PA1 is { 1,2,3,4 } when N1=2, N2=4, O1=8, O2=4, PA2 is { 1,3,4 }, or is { 1,2,3,4 } for PA1, PA2 is { 1,3,4 }, and PA3 is { 2,4 }.

Alternatively, the value of the configuration signal selected in the subclass PAi that option and installment signaling set PA is closed from the codebook subset is determined that i=1 ..., M, the value for stating configuration signal determines in the following manner by feedback kind PUCCH and/or PUSCH：

Mode 1：It is that PA1 is { 1,2,3,4 } during PUCCH, PA2 is { 2,3,4 }, or PA1 is { 1,2,3,4 }, and PA2 is { 2,3,4 }, and PA3 is { 3,4 }；Mode 2：It is that PA1 is { 1,2,3,4 } during PUSCH, PA2 is { 1,3,4 }, or PA1 is { 1,2,3,4 }, and PA2 is { 1,3,4 }, and PA3 is { Isosorbide-5-Nitrae }.

Alternatively, the code word of the Class A has following feature：The code word of channel quality information feedback type A includes an orthogonal beams to wave beam 1 and wave beam 2；The orthogonal beams are to being the orthogonal wave beam chosen from one group of beam set；By the first dimension port number N1, the second dimension port number N2 determines the value and the value number of beam index relative value of the relative value of the beam index of the wave beam 1 and wave beam 2 of the orthogonal beams pair in beam set.

Alternatively, the beam index relative value includes beam index relative value δ of the first dimension₁, represent the absolute value of the beam index difference of the first dimension of wave beam 1 and wave beam 2, and beam index relative value δ of the second dimension₂, represent the absolute value of the beam index difference of the first dimension of wave beam 1 and wave beam 2.Wherein, δ₁=k₁O₁, δ₂=k₂O₂, O1 be the first dimension oversample factor, O2 be the second dimension oversample factor, k₁It is less than N₁Positive integer, k₂It is less than N₂Positive integer.

Alternatively, according to the first dimension port number N1, the second dimension port number N2 determinations refer to beam index relative value δ for determining the first dimension with the value number of the beam index relative value of the orthogonal beams pair to the terminal₁Number and the first dimension beam index relative value δ₂Number, or δ₁And δ₂Number.

Alternatively, according to the first dimension port number N1, the second dimension port number N2 determines that the value of the relative value of the beam index of the orthogonal beams pair refers to beam index relative value δ for determining the first dimension to the terminal₁With beam index relative value δ of the first dimension₂。

Fig. 2 is the flow chart of the feedback method of another channel condition information CSI according to embodiments of the present invention.As shown in Fig. 2 the feedback method, including：

Step S202, terminal obtains channel state information reference signals CSI-RS after precoding；

Step S204, terminal measures the CSI-RS after the precoding and obtains channel matrix information；Terminal determines the code word of information feedback type B Class B according to the channel matrix information；

Step S206, according to the codeword feedback channel condition information CSI for determining.

Alternatively, terminal determines the rank information of channel according to channel matrix information, and channel sequence is grouped, wherein, the order group is that N number of value of the order of the channel is divided into M group to obtain, and N and M is positive integer, and N is more than or equal to M；

Terminal determines the set of pre-coding matrix index configuration signal and its corresponding value according to the channel sequence group, and the set according to described pre-coding matrix index configuration signal and its corresponding value determine the code word of Class B.

Alternatively, in N=1 or 2, M=1 is M=2 or M=3 when N is more than 2.

Alternatively, the pre-coding matrix index configuration signal is high-rise configuration signal, and the pre-coding matrix index configuration signal set PB of the pre-coding matrix index configuration signal includes value 1 and 2, wherein 1 is used to indicate LTE tradition code books that 2 to be used to indicate other code books.

Alternatively, in M=2, according to according to the channel sequence group the corresponding value of pre-coding matrix index configuration signal is determined, including：An order group 1 in 2 order groups selects 1 or 2 in pre-coding matrix index configuration signal set PB；Another order group 2 selects 2.

Alternatively, the order that order group 1 includes is { 1,2 }, and order group 2 includes the order more than 2；Or the order that includes of order group 1 is { 1,2,3,4 }, order group 2 includes the order more than 4.

Alternatively, the code word of information feedback type B Class B has following feature：Terminal divides the ports into two groups, port set 1 and port set 2；The port set 1 is divided into P1 port subgroup, and port set 2 is divided into P1 port subgroup, and P1 is positive integer；State the port set of the port formation of the port of a port subgroup of port set 1 described in the codeword selection of Class B and a port subgroup of port set 2.

Alternatively, the port of P1 subgroup of port set 1 is different, and the port of P1 subgroup of port set 2 is different.

Alternatively, the port has 2L, and port set 1 includes the L port in equipolarization direction, and port set 2 includes the L port in equipolarization direction, and the polarised direction of port set 1 is different with the polarised direction of port set 2；

I-th port index of the port set 1 is i, i=1 ..., L, then i-th port index of port set 2 is i+L, wherein, i=1 ..., L.

Alternatively, the port of a port subgroup of the port and port set 2 of a port subgroup of the Class B codeword selections port set 1 forms port set and is equivalent to：Select two column selection vector x₀And x₁Column selection matrix is formed, wherein, x₀ForIn one, x₁ForIn one, it is and unequal, wherein, each column vectorI-th+L port of i-th port or port set 2 for selection port group 1, wherein,Represent except i-th element be 1 in addition to other elements be all zero and dimension for the column selection of L vectorial, i=1 ..., L.

Alternatively, the column selection matrix includes 4 kinds of forms in RI=3：

The column selection matrix includes 2 kinds of forms in RI=4：

Alternatively, during the L=2, column selection vector is divided into 1 group S1, wherein

During the L=4, column selection vector is divided into the column selection vector that the column selection vector sum S2 that 2 groups S1 and S2, S1 include includes different, wherein, at least including one of following four kinds of modes：

Mode 1：S1 isAnd S2 is

Mode 2：S1 isAnd S2 is

Mode 3：S1 isAnd S2 is

Alternatively, terminal determines that the code word of information feedback type B Class B includes according to the channel matrix information：The terminal is according to column selection matrix information and the 2nd grade of codewords indexes information i2 of S1 or S2 feedback of the information for selecting；Wherein,

When L=2, RI=3, i2 is a value in 0～3；

When L=4, RI=3, i2 is a value in 0～5；

When L=2, RI=4, i2 is a value in 0～1；

When L=4, RI=4, i2 is a value in 0～3；

Fig. 3 is the flow chart of the collocation method of codebook configuration signaling according to embodiments of the present invention.As shown in figure 3, the method includes：

Step S302, base station to terminal sends channel state information reference signals CSI-RS；

Step S304, base station receives the channel condition information CSI that the terminal determines according to the CSI-RS, and determines the code word of information feedback type A Class A according to the channel condition information.

Alternatively, the CSI includes rank information；Determine that the code word of information feedback type A Class A includes according to the channel condition information：, the base station determines that codebook subset closes the set of option and installment signaling and corresponding value according to the rank information of channel.

Alternatively, base station is according to the first dimension port number N1, second dimension port number N2 determines the value and the value number of beam index relative value of the relative value of the beam index of the wave beam 1 and wave beam 2 of the orthogonal beams pair in beam set, and the value of the relative value of the beam index according to described wave beam 1 and wave beam 2 in beam set and the value number of beam index relative value determine the code word of Class A, and configure codeword information.

Fig. 4 is the flow chart of the collocation method of another codebook configuration signaling according to embodiments of the present invention.As shown in figure 4, the method includes：

Step S402, base station sends channel state information reference signals CSI-RS after precoding to terminal；

Step S404, base station receives the channel condition information CSI that the terminal determines according to the CSI-RS；

Step S406, according to the channel condition information code word of information feedback type B Class B is determined.

Alternatively, the CSI includes：The rank information of channel, wherein, the base station determines channel sequence group information according to the rank information of channel, the set of pre-coding matrix index configuration signal and its corresponding value are determined according to channel sequence group information, and the set according to described pre-coding matrix index configuration signal and its corresponding value determine the code word of Class B, wherein, the order group is that N number of value of the order of the channel is divided into M group to obtain, N and M is positive integer, and N is more than or equal to M.

Alternatively, it is determined that codebook configuration signaling value when, the second level codebook information i2 of base station receiving terminal feedback and obtains the codeword information of Class B according to i2 information.

Fig. 5 is the structured flowchart of the feedback device of channel condition information CSI according to embodiments of the present invention.The device is used for the method for realizing embodiment illustrated in fig. 1, as shown in figure 5, the device includes：

Acquisition module 50, for obtaining channel state information reference signals CSI-RS；

Measurement module 52, for measuring the CSI-RS channel matrix information is obtained；

Feedback module 54, for determining the code word of information feedback type A Class A according to the channel matrix information；And according to the codeword feedback CSI for determining.

Alternatively, feedback module 54, for determining the rank information of channel according to channel matrix information, and are grouped to channel sequence, obtain order group；Determine the code word according to the order group, wherein, the order group is that N number of value of the order of the channel is divided into M group to obtain, and N and M is positive integer, and N is more than or equal to M.

Alternatively, feedback module 54, for determining that codebook subset closes the set of option and installment signaling and its corresponding value according to the order group, and close the set of option and installment signaling and its code word of corresponding value determination Class A according to described codebook subset.

In N=1 or 2, M=1；When N is more than 2, M=2 or M=3.

Alternatively, by the first dimension port number N1, the second dimension port number N2, the first dimension oversample factor O1 and the second dimension oversample factor O2 determine the order group, and the determination mode of the order group includes：Mode 1：N1=4, N2=2, O1=8, O2=4, order group 1 is { 1,2,3 }, and order group 2 is { 4 ..., N }, or order group 1 is { 1,2,3 }, and order group 2 is { 4 }, and order group 3 is { 5,6,7,8 }；Mode 2：N1=2, N2=4, O1=8, O2=4, order group 1 be { 1,2 }, order group 2 be { 3,4 ..., N } or, order group 1 be { 1,2 }, order group 2 be { 3,4 }, order group 3 be { 5,6,7,8 }.

Alternatively, the codebook subset closes the codebook subset conjunction option and installment signaling set PA of option and installment signaling including A value, and A is the positive integer more than 1.

Alternatively, feedback module, a subset for closing option and installment signaling set PA from codebook subset is combined into PAi, subclass PAi includes the value number of Ai configuration signal, Ai is the positive integer less than or equal to A, the a subset of each channel sequence group correspondence code book Resource selection configuration signal set PA closes PAi, and subscript i is the positive integer less than or equal to M.

Alternatively, feedback module, for when M is 1, the value that the configuration signal is selected in whole components of option and installment signaling set PA being closed from codebook subset；When M is the positive integer more than 1, for i-th order group in M group, the value that the configuration signal is selected in the subclass PAi of option and installment signaling set PA is closed from codebook subset, the subclass PAi includes that Ai is worth, Ai is positive integer, i=1 ..., M.

Fig. 6 is the structured flowchart of the feedback device of another channel condition information CSI according to embodiments of the present invention.The device is used to realize the scheme in embodiment illustrated in fig. 2, as shown in fig. 6, the device includes：

Acquisition module 60, for obtaining precoding after channel state information reference signals CSI-RS；

Measurement module 62, for measuring the precoding after CSI-RS obtain channel matrix information；

Feedback module 64, for determining the code word of information feedback type B Class B according to the channel matrix information；And according to the codeword feedback channel condition information CSI for determining.

Alternatively, feedback module 64, for determining the rank information of channel according to channel matrix information, and are grouped to channel sequence, wherein, the order group is that N number of value of the order of the channel is divided into M group to obtain, and N and M is positive integer, and N is more than or equal to M；And the set of pre-coding matrix index configuration signal and its corresponding value are determined according to the channel sequence group, and the set according to described pre-coding matrix index configuration signal and its corresponding value determine the code word of Class B.

Alternatively, in N=1 or 2, M=1 is M=2 or M=3 when N is more than 2.

Fig. 7 is the structured flowchart of the configuration device of codebook configuration signaling according to embodiments of the present invention.The device is used to realize the scheme in embodiment illustrated in fig. 3, as shown in fig. 7, the device includes：

Sending module 70, for sending channel state information reference signals CSI-RS to terminal；

Receiver module 72, for receiving the channel condition information CSI that the terminal determines according to the CSI-RS, and determines the code word of information feedback type A Class A according to the channel condition information.

Fig. 8 is the structured flowchart of the configuration device of another codebook configuration signaling according to embodiments of the present invention.As shown in figure 8, the device includes：

Sending module 80, for sending channel state information reference signals CSI-RS after precoding to terminal；

Receiver module 82, for receiving the channel condition information CSI that the terminal determines according to the CSI-RS；

Determining module 84, for determining the code word of information feedback type B Class B according to the channel condition information.

Describe in detail below in conjunction with preferred embodiment.

Embodiment 1:The embodiment of Class A

System describe：In this communication system, including base station and terminal, they arrange have a set of code book CB jointly, and the topology of the antenna of base station is typically also planar array, that is, have the antenna in two dimension directions.Each can be write as the form of W=W1*W2 in CB, and each wave beam in code word W 1 has the form that form 2 is tieed upWherein, v_mAnd u_nThe discrete fourier vector of respectively first dimension and second dimension, m=1,2 ..., N₁₁, n=1,2 ..., N₁₂。Represent v_mAnd u_nKronecker products, the code book of first dimension of W1 is represented with PMI11, and the code book of second dimension is represented with PMI12.For the index of above-mentioned each PMI11 and PMI12, there is M1 W2 code word, each W2 code word is exactly to select 2 to tie up wave beam from W1And the Co-phasing of different polarised directions, corresponding codewords indexes are PMI2.Due to PMI11, the bit numbers sum of the feedback of PMI12 and PMI2 is typically than larger, feedback overhead is big, user selects the complexity of code book high, in order to solve this problem, M1 code word in W2 is divided into 4 kinds of configurations, every kind of configuration includes that a codebook subset in M1 code word is closed, shown in the following form of such as one of configuration set

I ' here₂That is a specific index in PMI2.As can be seen that each config is a subset in 32 code words closing.The order of this configuration typically has high-level signaling codebook subset conjunction option and installment signaling (Codebook-Subset-SelectionConfig) to be allocated to user, the signaling includes 4 kinds of possible values, PA1={ 1,2,3,4 }, for all Rank of the user set up.But some Rank may can only take part configuration therein, and rank is switched according to channel self-adapting, in order to reduce the frequent configuration of high-level signaling Codebook-Subset-SelectionConfig.Need base station and terminal that the configuration information of its corresponding Codebook-Subset-SelectionConfig is determined according to rank information.1～the N of value of channel sequence, wherein N can be with values as 4,5,6,7,8；Its method is as follows

Implementation method：

(1) communication node obtains channel sequence RI, and RI is grouped, and it is { 1,2 } to be divided into two groups of Set1, and Set2 is { 3,4 ..., N }.

Wherein, when communication node is base station, channel sequence RI is obtained by up channel reciprocity or RI is obtained by the uplink feedback of terminal.When communication node is terminal, channel sequence RI is obtained by descending channel information.

The mode that wherein described channel sequence RI is grouped can be normalized by definition, the packet mode that base station and user give tacit consent to, it is also possible to by the first dimension port number N1, the second dimension port number N2, first dimension oversample factor O1, the second dimension oversample factor O2 determines.Such as in N1=4, N2=2, O1=8, Set1 is { 1 when O2=4,2,3 }, Set2 is { 4, ..., N }, N1=2, Set1 is { 1,2 } when N2=4, O1=8, O2=4, Set2 is { 3,4 ..., N }, merely just illustrate certainly, do not have no effect on other packet modes and exist.

(2) according to rank grouping informations, it is determined that high-rise configuration signal codebook subset closes the value of option and installment signaling (Codebook-Subset-SelectionConfig).This value is that base station is allocated to terminal.Value is in PA1={ 1,2,3,4 }, such as be X1.

When rank is 1 or 2, it is in set1, then terminal determines that the value of Codebook-Subset-SelectionConfig is value X2=X1 of base station configuration；

When rank is more than 2, it is in Set2, then terminal is closed in a subset of configuration PA1 and take value X2 in PA2.Value number A2 of wherein PA2 is less than 4.

The value in value and PA2 in wherein PA1 can be determined by standardization, it is also possible to be determined by feedback kind PUCCH or PUSCH, such as be that PA1 is { 1 during PUCCH, 2,3,4 }, PA2 is { 2,3,4 }, it is that PA1 is { 1,2,3 during PUSCH, 4 }, PA2 is { 1,3,4 }, merely just illustrate certainly, do not have no effect on other packet modes and exist.

The value in value and PA2 in wherein PA1 can be by the first dimension port number N1, the second dimension port number N2, the first dimension oversample factor O1, the determination of the second dimension oversample factor O2, such as N1=4, it is that PA1 is { 1,2,3 when N2=2, O1=8, O2=4,4 }, PA2 is { 2,3,4 }, it is that PA1 is { 1 when N1=2, N2=4, O1=8, O2=4,2,3,4 }, PA2 is { 1,3,4 }, merely just illustrate certainly, do not have no effect on other packet modes and exist.

Further, when rank is more than 2, a mapping f1 is needed；Element X2 element X1 in PA1 being mapped in PA2.Mapping process is as follows：

(2.1) PA1={ a, b, c, d }, PAB2={ a, b, c }, wherein, it is 1 that a, b, c, d are value, in 2,3,4, and is not mutually equal.Value X1=a in PA1 is mapped to so f1 the X2=a in PA2, value X1=b in PA1 is mapped to f1 the X2=b in PA2, value X1=c in PA1 is mapped to f1 the X2=c in PA2, value X1=d in PA1 is mapped to f1 X2=a or b in PA2, or in c, that value is specifically mapped to, base station and terminal agreement is needed.Will 4 element compound mapping to 3 element set.

One more specifically value such as, (a=1, b=2, c=3, d=4) or (a=1, b=2, c=4, d=3) or (a=2, b=3, c=4, d=1).

(2.2) PA1={ a, b, c, d }, PA2={ a, b }, wherein, it is 1 that a, b, c, d are value, in 2,3,4, and is not mutually equal.Value X1=a in PA1 is mapped to so f1 the X2=a in PA2, value X1=b in PA1 is mapped to f1 the X2=b in PA2, value X1=d in PA1 is mapped to X2=a or b in PA2 for X2=a or b, f1 that f1 is mapped to value X1=c in PA1 in PA2.

One more specifically value such as, (a=1, b=2, c=3, d=4) or (a=3, b=4, c=1, d=2) or (a=2, b=3, c=4, d=1).

Embodiment 2

System describe part is described again here such as embodiment 1.

Implementation method：

(1) communication node obtains channel sequence RI, and RI is grouped, and it is { 1,2,3,4 } to be divided into two groups of Set1, and Set2 is { 5,5 ..., N }.

When rank be 1 either 2 either 3 or 4 when, it is in set1, then terminal determine Codebook-Subset-SelectionConfig value be base station configuration value X2=X1；

When rank is more than 4, it is in Set2, then terminal is closed in a subset of configuration PA1 and take value X2 in PA2.Value number A2 of wherein PA2 is less than 4.

Further, when rank is more than 4, a mapping f1 is needed；Element X2 element X1 in PA1 being mapped in PA2.Mapping process is as follows：

Embodiment 3

System describe part is described again here such as embodiment 1.

Implementation method：

(1) communication node obtains channel sequence RI, and RI is grouped, and it is { 1,2 } to be divided into two groups of Set1, and Set2 is { 3,4 }, and Set3 is { 5,6 ..., N }.

The mode that wherein described channel sequence RI is grouped can be normalized by definition, the packet mode that base station and user give tacit consent to, it is also possible to by the first dimension port number N1, the second dimension port number N2, first dimension oversample factor O1, the second dimension oversample factor O2 determines.Such as in N1=4, N2=2, O1=8, Set1 is { 1,2,3 } when O2=4, and Set2 is { 4 }, and Set3 is { 5,6,7,8 }；Set1 is { 1,2 } when N1=2, N2=4, O1=8, O2=4, and Set2 is { 3,4 }, and Set3 is { 5,6,7,8 }, is merely just illustrated certainly, does not have no effect on other packet modes and exists.

When rank is 3 or 4, it is in Set2, then terminal is closed in a subset of configuration PA1 and take value X2 in PA2.Value number A2 of wherein PA2 is less than 4.

Further, when rank is 3 or 4, a mapping f2 is needed；Element X2 element X1 in PA1 being mapped in PA2.Mapping process is as follows：

When rank is more than 4, it is in Set3, then terminal is closed in a subset of configuration PA1 and take value X3 in PA3.Value number A3 of wherein PA3 is less than 4.

Further, when rank is more than 4, a mapping f3 is needed；Element X2 element X1 in PA1 being mapped in PA3.Mapping process is as follows：

(2.1) PA1={ a, b, c, d }, PA3={ a }, wherein, it is 1 that a, b, c, d are value, in 2,3,4, and is not mutually equal.So f3 is mapped to the either b or c of value X1=a in PA1, or d in X2=a.

One more specifically value such as, (a=1, b=2, c=3, d=4) or (a=4, b=1, c=2, d=3) or (a=2, b=3, c=4, d=1).

(2.2) PA1={ a, b, c, d }, PA3={ a, b }, wherein, it is 1 that a, b, c, d are value, in 2,3,4, and is not mutually equal.Value X1=a in PA1 is mapped to so f3 the X2=a in PA2, value X1=b in PA1 is mapped to f3 the X2=b in PA2, value X1=d in PA1 is mapped to X2=a or b in PA2 for X2=a or b, f3 that f3 is mapped to value X1=c in PA1 in PA2.

The value in value and PA2, PA3 in wherein PA1 can be determined by standardization, it is also possible to be determined by feedback kind PUCCH or PUSCH, such as be that PA1 is { 1 during PUCCH, 2,3,4 }, PA2 is { 2,3,4 }, PA3 is { 3,4 }, it is that PA1 is { 1,2,3,4 } during PUSCH, PA2 is { 1,3,4 }, and PA3 is { 1,4 }, merely just illustrate certainly, do not have no effect on other packet modes and exist.

The value in value and PA2 in wherein PA1 can be by the first dimension port number N1, the second dimension port number N2, the first dimension oversample factor O1, the determination of second dimension oversample factor O2, such as N1=4, N2=2, it is that PA1 is { 1,2 when O1=8, O2=4,3,4 }, PA2 is { 2,3,4 }, PA3 is { 3,4 }；It is that PA1 is { 1,2,3,4 } when N1=2, N2=4, O1=8, O2=4, PA2 is { 1,3,4 }, and PA3 is { 2,4 }, is merely just illustrated certainly, does not have no effect on other packet modes and exists.

Embodiment 4:The embodiment of Class A

I ' here₂That is a specific index in PMI2.As can be seen that each config is a subset in 32 code words closing.The order of this configuration typically has high-level signaling codebook subset conjunction option and installment signaling (Codebook-Subset-SelectionConfig) to be allocated to user, the signaling includes 4 kinds of possible values, PA1={ 1,2,3,4 }, for all Rank of the user set up.But some Rank may can only take part configuration therein, and rank is switched according to channel self-adapting, in order to reduce the frequent configuration of high-level signaling Codebook-Subset-SelectionConfig.Need base station and terminal that the configuration information of its corresponding Codebook-Subset-SelectionConfig is determined according to rank information.1～the N of value of channel sequence, wherein N can be with values as 4,5,6,7,8.

In codebook design in the related, under every kind of configuration of 2～Config4 of config, in order to find code book of the channel sequence more than 2, need to find one group of orthogonal beams pair, and the step-length (δ of wave beam pair₁,δ₂) there are various values：

This design, does not consider the first dimension port N₁, the second dimension port N₂The step-length (δ that may cause of size₁,δ₂) value it is different, and the number of value configuration is different.It is not that very flexibly the species of traversal is also more.So as to need to make improvements, improved method is according to port configuration information：First dimension port N₁, the second dimension port N₂Determine step-length (δ₁,δ₂) valued content, with value number, and bound.Port configuration (the δ having₁,δ₂) there was only a kind of value, what is had has 2 kinds, and what is had has more than 2 kinds of values, the demand that so could be more flexibly adapted under various port cases.Such as, according to the first dimension port N₁, the second dimension port N₂Span, by different (δ₁,δ₂) value arranges into following form

According to N₁And N₂Value difference, the value of step information can change：

Such as, in N₂=1, N₁When=2, there are a value, i.e. (δ₁,δ₂)=(O₁,0)

In N₂=1, in N₁>When 2, there are two values, i.e. (δ₁,δ₂)={ (O₁,0),(2O₁,0)}

In N₂=2, N₁When=2, (δ₁,δ₂)={ (O₁,0),(0,O₂)}

In N₂=2, N₁When=4, (δ₁,δ₂)={ (O₁,0),(0,O₂),(O₁,O₂),(2O₁,0)}

……

Here there are other combinations, do not enumerate.And this is the preferred version of this patent, including but not limited to the value in the present embodiment.

Embodiment 5:The embodiment of Class B

System describe：In this communication system, including base station and terminal, their common agreements have a set of code book CB, start the feedback kind for Class B occur in the version of Release 13, such CSI-RS pilot tones have precoding, the code word fed back in its CSI can continue to use traditional code word, that is the code word of 8～Release12 of Release, capable code word can also be reconfigured, why code word is reconfigured, it is because, traditional code word is generally discrete fourier vector, unsuitable for the channel after precoding.Configure (PMI-Config) to indicate by high-level signaling pre-coding matrix index, its value is generally 1 and 2, wherein 1 represents traditional LTE code books, 2 represent other code books.It is also that all Rank to the user are all suitable for.

But some Rank may can only take part configuration therein, and rank is switched according to channel self-adapting, in order to reduce the frequent configuration of high-level signaling PMI-Config.Need base station and terminal that the configuration information of its corresponding PMI-Config is determined according to rank information.1～the N of value of channel sequence, wherein N can be with values as 4,5,6,7,8.Its method is as follows

Implementation method：

The mode that wherein described channel sequence RI is grouped can be normalized by definition, the packet mode that base station and user give tacit consent to, it is also possible to by the first dimension port number N1, the second dimension port number N2, first dimension oversample factor O1, the second dimension oversample factor O2 determines.Such as in N1=4, N2=2, O1=8, Set1 is { 1,2,3 } when O2=4, and Set2 is { 4 }, and Set3 is { 5,6,7,8 }；Set1 is { 1,2 } when N1=2, N2=4, O1=8, O2=4, and Set2 is { 3,4 }, and Set3 is { 6,7,8 }, is merely just illustrated certainly, does not have no effect on other packet modes and exists.(2) according to rank grouping informations, it is determined that the value of high-rise configuration signal pre-coding matrix index configuration (PMI-Config).This value is that base station is allocated to terminal.Value is in PA1={ 1,2 }, such as be X1.

When rank is 1 or 2, it is in set1, then terminal determines that the value of PMI-Config is value X2=X1 of base station configuration；

When rank is more than 2, it is in Set2, then terminal is closed in a subset of configuration PA1 and take value X2, such as X2=1 in PA2；

Embodiment 6:The embodiment of Class B

System describe：In this communication system, including base station and terminal, their common agreements have a set of code book CB, start the feedback kind for Class B occur in the version of Release 13, such CSI-RS pilot tones have precoding, the code word fed back in its CSI can continue to use traditional code word, that is the code word of 8～Release12 of Release, capable code word can also be reconfigured, why code word is reconfigured, it is because, traditional code word is generally discrete fourier vector, unsuitable for the channel after precoding.May need to reconfigure codebook information under some rank.

Implementation method：

The mode that wherein described channel sequence RI is grouped can be normalized by definition, the packet mode that base station and user give tacit consent to, it is also possible to by the first dimension port number N1, the second dimension port number N2, first dimension oversample factor O1, the second dimension oversample factor O2 determines.Such as in N1=4, N2=2, O1=8, Set1 is { 1,2,3 } when O2=4, and Set2 is { 4 }, and Set3 is { 5,6,7,8 }；Set1 is { 1,2 } when N1=2, N2=4, O1=8, O2=4, and Set2 is { 3,4 }, and Set3 is { 6,7,8 }, is merely just illustrated certainly, does not have no effect on other packet modes and exists.

(2) according to rank grouping informations, codebook configuration information is determined to specify codebook information.

When it is 4 that rank is 3 and rank, is determined according to following scheme and specify codebook information,

Specified codebook information is exactly that the Beamformed CSI-RS of the precoding to base station carry out port selection.Such as, a total of 2L=8 port.It is divided into two port sets, the port of the corresponding positive 45 ° of polarised directions in every group of L=4 port, wherein port set 1, the port of the corresponding minus 45 ° of polarised directions of port set 2.I-th port index of port set 1 be i, i=1,2,3,4；I-th port index of port set 2 be i, i=5,6,7,8；

Merely just illustrate, however not excluded that other ports select and polarised direction type.Such as total port number can also be 4, and 12 etc., polarised direction can also be horizontal vertical polarization.

With a column vectorCome i-th port of selection port port set 1 or the i-th+L port of port set 2, wherein,Represent except i-th element be 1 in addition to other elements be all zero dimension it is vectorial for the column selection of L, for selection port, i=1 ..., L, L=4 here.

It is exactly to select two column selection vector x that port selects₀And x₁Column selection matrix is formed, wherein, x₀ForIn one, x₁ForIn one, it is and unequal.

The column selection matrix includes 4 kinds of forms in RI=3：

OrOr

Or

The column selection matrix includes 4 kinds of forms in RI=4：

Or

Column selection vector is divided into the column selection vector that the column selection vector sum S2 that 2 groups S1 and S2, S1 include includes different, the including but not limited to following combination of its combination

S1 isAnd S2 is

It means that this when, when precoding is done in base station to CSI-RS, it with the multi-beam beam Bean3 and Bean4 of orthogonality, port 3 and port 4 is, with orthogonality, so to use that the wave beam Bean1 and Bean2 used in port 1 and port 2 isThe port for choosing, is orthogonal rank3's or between 4 different layers.

Or

S1 isAnd S2 is

It means that this when, when precoding is done in base station to CSI-RS, it with the multi-beam beam Bean2 and Bean4 of orthogonality, port 2 and port 4 is, with orthogonality, so to use that the wave beam Bean1 and Bean3 used in port 1 and port 3 isThe port for choosing, is orthogonal rank3's or between 4 different layers.

Or

S1 isAnd S2 is

It means that this when, when precoding is done in base station to CSI-RS, it with the multi-beam beam Bean2 and Bean3 of orthogonality, port 2 and port 3 is, with orthogonality, so to use that the wave beam Bean1 and Bean4 used in port 1 and port 4 isThe port for choosing, is orthogonal rank3's or between 4 different layers.

The value of the x0 in the different S1 and S2 and x1 is brought into rank3 and rank4 column selection matrixes the port selection matrix for just constituting rank3, and the port selection matrix of rank4.

(3) codebook information is specified in base station according to channel information choosing, and he is fed back to base station.

Through the above description of the embodiments, those skilled in the art can be understood that can be added the mode of required general hardware platform to realize according to the method for above-described embodiment by software, can certainly be by hardware, but in many cases the former is more preferably embodiment.Based on such understanding, the part that technical scheme substantially contributes in other words to prior art can be embodied in the form of software product, the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disc, CD), use so that a station terminal equipment (can be mobile phone including some instructions, computer, server, or the network equipment etc.) perform method described in each embodiment of the invention.

It should be noted that above-mentioned modules can be by software or hardware to realize, for the latter, can be accomplished by, but not limited to this：Above-mentioned module is respectively positioned in same processor；Or, above-mentioned module is located at respectively in multiple processors.

Embodiments of the invention additionally provide a kind of storage medium.Alternatively, in the present embodiment, above-mentioned storage medium can be configured so that storage for performing the program code of the method and step in above example.

Obviously, those skilled in the art should be understood that, above-mentioned each module of the invention or each step can be realized with general computing device, they can be concentrated on single computing device, or be distributed on the network that multiple computing devices are constituted, alternatively, they can be realized with the executable program code of computing device, so as to, can be stored in being performed by computing device in storage device, and in some cases, can be with the step shown or described by performing different from order herein, or they are fabricated to respectively each integrated circuit modules, or be fabricated to single integrated circuit module to realize by the multiple modules or step in them.So, the present invention is not restricted to any specific hardware and software combination.

The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for a person skilled in the art, the present invention there can be various modifications and variations.All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., should be included within the scope of the present invention.

Claims

1. a kind of feedback method of channel condition information CSI, it is characterised in that include：

Terminal obtains channel state information reference signals CSI-RS；

Terminal measures the CSI-RS and obtains channel matrix information；

Terminal determines the code word of information feedback type A Class A according to the channel matrix information；And according to true Fixed codeword feedback CSI.

2. method according to claim 1, it is characterised in that terminal determines channel condition information according to the channel matrix information The code word of feedback kind A Class A, including：

Terminal determines the rank information of channel according to channel matrix information, and channel sequence is grouped, and obtains order group；

Determine the code word according to the order group, wherein, the order group is that N number of value of the order of the channel is divided into M Individual group obtains, and N and M is positive integer, and N is more than or equal to M.

3. method according to claim 2, it is characterised in that determine the code word according to the order group, including：

Terminal determines that codebook subset closes the set of option and installment signaling and its corresponding value according to the order group, and according to described Codebook subset close option and installment signaling set and its it is corresponding value determine Class A code word.

4. method according to claim 3, it is characterised in that in N=1 or 2, M=1；When N is more than 2, M=2 Or M=3.

5. method according to claim 3, it is characterised in that by the first dimension port number N₁, the second dimension port number N₂, the first dimension oversample factor O₁With the second dimension oversample factor O₂Determine the order group, the determination side of the order group Formula includes：

Mode 1：N1=4, N2=2, O1=8, O2=4, order group 1 is { 1,2,3 }, and order group 2 is { 4 ..., N },

Or order group 1 is { 1,2,3 }, order group 2 is { 4 }, and order group 3 is { 5,6,7,8 }；

Mode 2：N1=2, N2=4, O1=8, O2=4, order group 1 is { 1,2 }, and order group 2 is { 3,4 ..., N }

Or, order group 1 is { 1,2 }, and order group 2 is { 3,4 }, and order group 3 is { 5,6,7,8 }.

6. method according to claim 3, it is characterised in that the codebook subset closes the codebook subset of option and installment signaling and closes Option and installment signaling set PA includes A value, and A is the positive integer more than 1.

7. method according to claim 6, it is characterised in that determine that codebook subset closes option and installment signaling according to the order group Set, including：

The a subset for closing option and installment signaling set PA from codebook subset is combined into PA_i, subclass PA_iIncluding A_iIt is individual to match somebody with somebody The value number of confidence order, A_iIt is the positive integer less than or equal to A, each channel sequence group correspondence code book Resource selection is matched somebody with somebody The a subset of confidence order set PA closes PA_i, and subscript i is the positive integer less than or equal to M.

8. method according to claim 3, it is characterised in that determine that codebook subset closes option and installment signaling according to the order group Value, including：

When M is 1, closes in whole components of option and installment signaling set PA from codebook subset and select the configuration The value of signaling；

When M is the positive integer more than 1, for i-th order group in M group, from codebook subset option and installment signaling is closed The subclass PA of set PA_iIn select the value of the configuration signal, the subclass PA_iIncluding A_iIndividual value, A_iFor just whole Number, i=1 ..., M.

9. method according to claim 3, it is characterised in that determine that codebook subset closes option and installment signaling according to the order group Value include：

The option and installment signaling set PA and subclass PA is closed according to codebook subset_iMapping relations from the subclass PA_iThe middle value for selecting the configuration signal, wherein, the mapping relations are used to indicate that the codebook subset closes option and installment letter The component and the subclass PA of order set PA_iIn component between mapping relations.

10. method according to claim 9, it is characterised in that determine that codebook subset closes option and installment signaling according to the order group Value include：

In M=2,

For one of order group 1, from the codebook subset subclass PA of option and installment signaling set PA is closed₁Middle selection The value of the configuration signal；

For one of order group 2, from the codebook subset subclass PA of option and installment signaling set PA is closed₂Middle selection The value of the configuration signal；

In M=3,

For one of order group 3, from the codebook subset subclass PA of option and installment signaling set PA is closed₃Middle selection The value of the configuration signal；

Wherein, the subclass PA₁There are A1 value, subclass PA₂There are A2 value, the subclass PA₃Have A3 value, and A3≤A2<A1, and A1=A.

11. methods according to claim 10, it is characterised in that

In M=2, determine that codebook subset closes the value of option and installment signaling and includes according to the order group：

For order group 1, close in component in option and installment signaling set PA and the PA1 according to the codebook subset Component between mapping relations select the value of the configuration signal；

For order group 2, close in component in option and installment signaling set PA and the PA2 according to the codebook subset Component between mapping relations select the value of the configuration signal；

In M=3, determine that codebook subset closes the value of option and installment signaling and also includes according to the order group,

For order group 3, the component and the PA in option and installment signaling set PA is closed according to the codebook subset₃In Component between mapping relations select the value of the configuration signal.

12. methods according to claim 7, it is characterised in that close the son of option and installment signaling set PA from the codebook subset Set PA_iThe value of the configuration signal of middle selection is by the first dimension port number N₁, the second dimension port number N₂, the Dimension oversample factor O₁, the second dimension oversample factor O₂It is determined that, wherein, i=1 ..., M, the configuration signal Value determination mode includes：

Mode 1：When N1=4, N2=2, O1=8, O2=4 for PA1 be { 1,2,3,4 }, PA2 be { 2,3,4 }, Huo Zhewei PA1 is { 1,2,3,4 }, and PA2 is { 2,3,4 }, and PA3 is { 3,4 }；

Mode 2：When N1=2, N2=4, O1=8, O2=4 for PA1 be { 1,2,3,4 }, PA2 be { 1,3,4 }, Huo Zhewei PA1 is { 1,2,3,4 }, and PA2 is { 1,3,4 }, and PA3 is { 2,4 }.

13. methods according to claim 7, from the codebook subset subclass PA of option and installment signaling set PA is closed_iMiddle choosing The value of the configuration signal selected is determined that i=1 ..., M are described to state with confidence by feedback kind PUCCH and/or PUSCH The value of order determines in the following manner：

Mode 1：During PUCCH for PA1 be { 1,2,3,4 }, PA2 be { 2,3,4 }, or PA1 be { 1,2,3,4 }, PA2 For { 2,3,4 }, PA3 is { 3,4 }；

Mode 2：During PUSCH for PA1 be { 1,2,3,4 }, PA2 be { 1,3,4 }, or PA1 be { 1,2,3,4 }, PA2 For { 1,3,4 }, PA3 is { Isosorbide-5-Nitrae }.

14. methods according to claim 1, it is characterised in that the code word of the Class A has following feature：

The code word of channel quality information feedback type A includes an orthogonal beams to wave beam 1 and wave beam 2；

The orthogonal beams are to being the orthogonal wave beam chosen from one group of beam set；

By the first dimension port number N1, the second dimension port number N2 determines the wave beam 1 and wave beam of the orthogonal beams pair The value of the relative value of 2 beam index in beam set and the value number of beam index relative value.

15. methods according to claim 14, it is characterised in that the beam index relative value includes the wave beam rope of the first dimension Draw relative value δ₁, represent the absolute value of the beam index difference of the first dimension of wave beam 1 and wave beam 2, and the second dimension Beam index relative value δ₂, represent the absolute value of the beam index difference of the first dimension of wave beam 1 and wave beam 2.Wherein, δ₁=k₁O₁, δ₂=k₂O₂, O1 be the first dimension oversample factor, O2 be the second dimension oversample factor, k₁For little In N₁Positive integer, k₂It is less than N₂Positive integer.

16. methods according to claim 14, it is characterised in that the terminal according to the first dimension port number N1, Two-dimensionses port number N2 determinations refer to determination first with the value number of the beam index relative value of the orthogonal beams pair Beam index relative value δ of dimension₁Number and the first dimension beam index relative value δ₂Number, or δ₁And δ₂'s Number.

17. methods according to claim 14, it is characterised in that the terminal according to the first dimension port number N1, Two-dimensionses port number N2 determines that the value of the relative value of the beam index of the orthogonal beams pair refers to the first dimension of determination Beam index relative value δ₁With beam index relative value δ of the first dimension₂。

18. a kind of feedback methods of channel condition information CSI, it is characterised in that include：

Terminal obtains channel state information reference signals CSI-RS after precoding；

Terminal measures the CSI-RS after the precoding and obtains channel matrix information；

Terminal determines the code word of information feedback type B Class B according to the channel matrix information；And according to true The fixed codeword feedback channel condition information CSI.

19. methods according to claim 18, it is characterised in that

Terminal determines the rank information of channel according to channel matrix information, and channel sequence is grouped, wherein, the order group It is that N number of value of the order of the channel is divided into M group to obtain, N and M is positive integer, and N is more than or equal to M；

Terminal determines the set of pre-coding matrix index configuration signal and its corresponding value according to the channel sequence group, and according to The set of described pre-coding matrix index configuration signal and its corresponding value determine the code word of Class B.

20. methods according to claim 19, it is characterised in that in N=1 or 2, M=1, N be more than 2 when be M=2 or M=3.

21. methods according to claim 19, it is characterised in that the pre-coding matrix index configuration signal is high-rise with confidence Order, the pre-coding matrix index configuration signal set PB of the pre-coding matrix index configuration signal includes value 1 and 2, its In 1 be used for indicate LTE tradition code book, 2 be used for indicate other code books.

22. methods according to claim 19, it is characterised in that in M=2, according to according to the channel sequence group precoding is determined The corresponding value of matrix index configuration signal, including：

An order group 1 in 2 order groups selects 1 or 2 in pre-coding matrix index configuration signal set PB；It is another Individual order group 2 selects 2.

23. methods according to claim 22, it is characterised in that the order that order group 1 includes is { 1,2 }, order group 2 is included more than 2 Order；Or the order that includes of order group 1 is { 1,2,3,4 }, order group 2 includes the order more than 4.

24. methods according to claim 18, it is characterised in that the code word of information feedback type B Class B has Following feature：

Terminal divides the ports into two groups, port set 1 and port set 2

The port set 1 is divided into P1 port subgroup, and port set 2 is divided into P1 port subgroup, and P1 is positive integer；

The a port of the port of a port subgroup of port set 1 and port set 2 described in the codeword selection of the Class B The port set that the port of subgroup is formed；

Wherein, the port of P1 subgroup of port set 1 is different, the mutual not phase in port of P1 subgroup of port set 2 Together.

25. methods according to claim 24, it is characterised in that

The port has 2L, and port set 1 includes the L port in equipolarization direction, and port set 2 includes equipolarization The L port in direction, and the polarised direction of port set 1 is different with the polarised direction of port set 2；

26. methods according to claim 25, it is characterised in that a port of the Class B codeword selections port set 1 The port of the port of group and a port subgroup of port set 2 forms port set and is equivalent to：Select two column selection vectors x₀And x₁Column selection matrix is formed, wherein, x₀ForOne in i=1 ..., L, x₁ForI=1 ..., in L One, and it is unequal, wherein, each column vectorI-th port or port set 2 for selection port group 1 The i-th+L ports, wherein,Represent except i-th element is that other elements are all zero and dimension is the row of L in addition to 1 Select vectorial, i=1 ..., L.

27. methods according to claim 26, it is characterised in that

The column selection matrix includes 4 kinds of forms in RI=3：

W_{0}^{(3)} = (\begin{matrix} x_{0} & x_{0} & x_{1} \\ x_{0} & - x_{0} & - x_{1} \end{matrix}), W_{1}^{(3)} = (\begin{matrix} x_{0} & x_{1} & x_{0} \\ x_{0} & x_{1} & - x_{0} \end{matrix}),

W_{2}^{(3)} = (\begin{matrix} x_{1} & x_{0} & x_{1} \\ x_{1} & - x_{0} & - x_{1} \end{matrix}), W_{3}^{(3)} = (\begin{matrix} x_{0} & x_{1} & x_{1} \\ x_{0} & x_{1} & - x_{1} \end{matrix});

The column selection matrix includes 2 kinds of forms in RI=4：

W_{0}^{(4)} = (\begin{matrix} x_{0} & x_{1} & x_{0} & x_{1} \\ x_{0} & x_{1} & - x_{0} & - x_{1} \end{matrix}), W_{1}^{(4)} = (\begin{matrix} x_{0} & x_{1} & x_{0} & x_{1} \\ {jx}_{0} & {jx}_{1} & - {jx}_{0} & - {jx}_{1} \end{matrix}) .

28. methods according to claim 26, it is characterised in that

During the L=2, column selection vector is divided into 1 group S1, wherein

During the L=4, column selection vector is divided into what the column selection vector sum S2 that 2 groups S1 and S2, S1 include was included Column selection vector is different, wherein, at least including one of following four kinds of modes：

Mode 1：S1 is

{x_{0} = e_{1}^{(4)}, x_{1} = e_{2}^{(4)}}

And S2 is

{x_{0} = e_{3}^{(4)}, x_{1} = e_{4}^{(4)}},

Mode 2：S1 is

{x_{0} = e_{1}^{(4)}, x_{1} = e_{3}^{(4)}}

And S2 is

{x_{0} = e_{2}^{(4)}, x_{1} = e_{4}^{(4)}},

Mode 3：S1 is

{x_{0} = e_{1}^{(4)}, x_{1} = e_{4}^{(4)}}

And S2 is

{x_{0} = e_{2}^{(4)}, x_{1} = e_{3}^{(4)}} .

29. methods according to claim 28, it is characterised in that terminal determines that channel status is believed according to the channel matrix information The code word of breath feedback kind B Class B includes：

The terminal is according to column selection matrix information and the 2nd grade of codewords indexes information i2 of S1 or S2 feedback of the information for selecting；

Wherein,

When L=2, RI=3, i2 is a value in 0～3；

When L=4, RI=3, i2 is a value in 0～5；

When L=2, RI=4, i2 is a value in 0～1；

When L=4, RI=4, i2 is a value in 0～3.

30. a kind of collocation methods of codebook configuration signaling, it is characterised in that include

Base station to terminal sends channel state information reference signals CSI-RS；

The base station receives the channel condition information CSI that the terminal determines according to the CSI-RS, and according to the channel Status information determines the code word of information feedback type A Class A.

31. methods according to claim 30, it is characterised in that the CSI includes rank information；Believe according to the channel status Breath determines that the code word of information feedback type A Class A includes：, the base station determines according to the rank information of channel Codebook subset closes the set of option and installment signaling and corresponding value.

32. methods according to claim 31, it is characterised in that base station is according to the first dimension port number N1, the second dimension end Mouth number N 2 determines taking for the relative value of the beam index of the wave beam 1 and wave beam 2 of the orthogonal beams pair in beam set The value number of value and beam index relative value, and the wave beam according to described wave beam 1 and wave beam 2 in beam set The value of the relative value of index and the value number of beam index relative value determine the code word of Class A, and configure code word letter Breath.

33. a kind of collocation methods of codebook configuration signaling, it is characterised in that include：

Base station sends channel state information reference signals CSI-RS after precoding to terminal；

The base station receives the channel condition information CSI that the terminal determines according to the CSI-RS, and according to the channel Status information determines the code word of information feedback type B Class B.

34. methods according to claim 33, it is characterised in that the CSI includes：The rank information of channel, wherein, it is described Base station determines channel sequence group information according to the rank information of channel, determines that pre-coding matrix index is configured according to channel sequence group information The set of signaling and its corresponding value, and the set according to described pre-coding matrix index configuration signal and its corresponding value Determine the code word of Class B, wherein, the order group is that N number of value of the order of the channel is divided into M group to obtain, N It is positive integer with M, and N is more than or equal to M.

35. methods according to claim 34, it is characterised in that it is determined that codebook configuration signaling value when, base station receiving terminal The second level codebook information i2 of feedback, and the codeword information of Class B is obtained according to i2 information.

36. a kind of feedback devices of channel condition information CSI, it is characterised in that include：

Acquisition module, for obtaining channel state information reference signals CSI-RS；

Measurement module, for measuring the CSI-RS channel matrix information is obtained；

Feedback module, for determining the code word of information feedback type A Class A according to the channel matrix information； And according to the codeword feedback CSI for determining.

37. devices according to claim 36, it is characterised in that the feedback module, for being determined according to channel matrix information The rank information of channel, and channel sequence is grouped, obtain order group；Determine the code word according to the order group, wherein, The order group is that N number of value of the order of the channel is divided into M group to obtain, and N and M is positive integer, and N is more than Or equal to M.

38. devices according to claim 37, it is characterised in that the feedback module, for determining code book according to the order group The set of subclass option and installment signaling and its corresponding value, and the collection of option and installment signaling is closed according to described codebook subset Close and its corresponding code word for being worth determination Class A.

39. devices according to claim 38, it is characterised in that in N=1 or 2, M=1；When N is more than 2, M=2 or M=3.

40. devices according to claim 38, it is characterised in that by the first dimension port number N₁, the second dimension port number N₂, the first dimension oversample factor O₁With the second dimension oversample factor O₂Determine the order group, the determination side of the order group Formula includes：

41. devices according to claim 38, it is characterised in that the codebook subset closes the codebook subset of option and installment signaling and closes Option and installment signaling set PA includes A value, and A is the positive integer more than 1.

42. devices according to claim 41, it is characterised in that the feedback module, for closing option and installment from codebook subset The a subset of signaling set PA is combined into PA_i, subclass PA_iIncluding A_iThe value number of individual configuration signal, A_iFor little In or positive integer equal to A, a subset of each channel sequence group correspondence code book Resource selection configuration signal set PA closes PA_i, and subscript i is the positive integer less than or equal to M.

43. devices according to claim 38, it is characterised in that the feedback module, for when M is 1, from code book The value of the configuration signal is selected in whole components of Resource selection configuration signal set PA；M is just whole more than 1 During number, for i-th order group in M group, from codebook subset the subclass PA of option and installment signaling set PA is closed_iIn Select the value of the configuration signal, the subclass PA_iIncluding A_iIndividual value, A_iFor positive integer, i=1 ..., M.

44. a kind of feedback devices of channel condition information CSI, it is characterised in that include：

Acquisition module, for obtaining precoding after channel state information reference signals CSI-RS；

Measurement module, for measuring the precoding after CSI-RS obtain channel matrix information；

Feedback module, for determining the code word of information feedback type B Class B according to the channel matrix information； And according to the codeword feedback channel condition information CSI for determining.

45. devices according to claim 44, it is characterised in that the feedback module, for being determined according to channel matrix information The rank information of channel, and channel sequence is grouped, wherein, the order group is by N number of value of the order of the channel point Obtain for M group, N and M is positive integer, and N is more than or equal to M；And determined according to the channel sequence group The set of pre-coding matrix index configuration signal and its corresponding value, and according to described pre-coding matrix index configuration signal Set and its it is corresponding value determine Class B code word.

46. devices according to claim 45, it is characterised in that in N=1 or 2, M=1, N be more than 2 when be M=2 or M=3.

47. a kind of configuration devices of codebook configuration signaling, it is characterised in that include：

Sending module, for sending channel state information reference signals CSI-RS to terminal；

Receiver module, for receiving the channel condition information CSI that the terminal determines according to the CSI-RS, and according to institute State the code word that channel condition information determines information feedback type A Class A.

48. a kind of configuration devices of codebook configuration signaling, it is characterised in that include：

Sending module, for sending channel state information reference signals CSI-RS after precoding to terminal；

Receiver module, for receiving the channel condition information CSI that the terminal determines according to the CSI-RS；

Determining module, for determining the code word of information feedback type B Class B according to the channel condition information.

49. a kind of terminals, it is characterised in that include：Device any one of claim 36-43, or claim 44-46 Any one of device.

50. a kind of base stations, it is characterised in that include：Device described in claim 47 or 48.