CN104144007B - A kind of information feedback method and device based on code book - Google Patents

A kind of information feedback method and device based on code book Download PDF

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Publication number
CN104144007B
CN104144007B CN201310169070.5A CN201310169070A CN104144007B CN 104144007 B CN104144007 B CN 104144007B CN 201310169070 A CN201310169070 A CN 201310169070A CN 104144007 B CN104144007 B CN 104144007B
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terminal
code book
coding matrix
network equipment
subset
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CN104144007A (en
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苏昕
卫瑞平
荆梅芳
拉盖施
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Priority to CN201310169070.5A priority Critical patent/CN104144007B/en
Priority to PCT/CN2014/077025 priority patent/WO2014180319A1/en
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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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • 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

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

The invention discloses a kind of information feedback method and device based on code book.The inventive method includes：Transmission characteristics of terminal or terminal capability, the pre-coding matrix set that uses when selecting feedback from available code book, and to the pre-coding matrix set gone out selected by network equipment instruction；The pre-coding matrix set that the terminal goes out selected by determines the number of data streams that the terminal is supported, according to it is selected go out pre-coding matrix collection be combined into the time frequency unit that needs to carry out feedback of the information and determine the pre-coding matrix recommended, and channel quality information is determined according to the pre-coding matrix of recommendation；The terminal reports the mark corresponding to the pre-coding matrix of recommendation to the network equipment, and the number of data streams and channel quality information determined.Using the present invention selection of pre-coding matrix and the characteristic of terminal during the feedback of the information based on code book, can be made to match.

Description

A kind of information feedback method and device based on code book
Technical field
The present invention relates to wireless communication technology field, more particularly to a kind of information feedback method and device based on code book.
Background technology
LTE (Long Term Evolution, Long Term Evolution) is 3G evolution, using OFDM (Orthogonal Frequency Division Multiplexing, OFDM) and MIMO (Multi-input Multi-output, Multiple-input and multiple-output) technology.MIMO is as one of key technology in LTE, and its algorithm can be divided into emission diversity scheme and space is answered With scheme, wherein, spatial multiplex scheme includes Open-Loop Spatial Multiplexing and the Closed-Loop Spatial Multiplexing based on code book again.Answer in closed loop space Precoding technique in can make the spatial characteristics of transmission signal and channel match, and be better than opening it is possible to obtaining The performance of ring transmission.
During the entire process of data transfer, channel condition information is that network side carries out precoding and various adaptive all the time The important evidence that should be adjusted and dispatch.The feedback of channel condition information is broadly divided into explicit, implicit and based on the anti-of reciprocity Three classes are presented, generally use the implicit feedback mechanism based on code book in LTE at present.
So-called code book is the set that available pre-coding matrix is formed.In feedback procedure based on code book, UE (User Equipment, user equipment or user terminal) quantization in space formed to optimal pre-coding matrix realized by code book, Therefore the design process of code book should take into full account the distribution characteristics of optimal pre-coding matrix.And this feature and MIMO application Scene has substantial connection, for different scene (comprising antenna spacing, polarization configuration, channel dispersion body distribution situation and The combination of the multiple factors such as angular distribution is reached, left accordingly), the design and optimization principle of code book is all not quite similar.In view of Above-mentioned reason, in order to make code book be applied to plurality of application scenes, feasible scheme includes：
Compound code book (single set code book) is designed, is included in code book and is directed to two or more intended application scene institutes The subset of design；
The more set code books of design, i.e., for code book corresponding to different intended application Scenario Designs, wherein, an intended application The corresponding code book of scene.
For example, LTE Rel-8 4 antenna codebooks substantially belong to a kind of compound code book, a part of element in the code book For the design of high associated scenario, another part element is then more suitable for irrelevant or low associated scenario.For this code book knot Structure, CSR (Codebook Subset Restriction, codebook subset limitation) mechanism is also introduced in LTE Rel-8, makes eNB (evolution NodeB, enode b, namely evolution base station) can according to itself antenna configuration situation and other because Element is limited used codebook subset.
UE is when reporting CSI (Channel State Information, channel condition information), it is necessary to be matched somebody with somebody according to CSR Put, fallen into a trap from available pre-coding matrix and count PMI (Precoding Matrix Indication, the pre-coding matrix mark of report in Know), RI (Rank Indication, class letter, for mark data stream quantity) and CQI (Channel Quality Indication, transmission quality mark).CSR mechanism defined in LTE Rel-8 can make pre-coding matrix to a certain extent Set more matches with application scenarios, while can also reduce UE and carry out the required precoding square traveled through that given the correct time on PMI, RI and CQI Battle array quantity, and UE can be carried out the processes that report of CSI carry out more fully control (such as limitation UE report it is relatively low rank).Introduced in LTE Rel-10 after 8 antenna codebooks, also define similar CSR mechanism.
In order to cover more rich application scenarios, a variety of eNB aerial arrays forms are better adapted to, can be directed to more Individual optimization aim separately designs code book.This mode is not used also by LTE specification, but has occurred similar skill in 3GPP Art motion.Such as more set code books can be set, downloaded by code book or other mechanism are specified currently used code book by network side. In addition, in the scheme for the enhancing of 4 antenna feedbacks that 3GPP is being discussed at present, it was also proposed that can be in original Rel-8 code books base On plinth, code book expansion is carried out by introducing new pre-coding matrix, and the mode of code book used is specified by network side.
Inventor has found that prior art at least has following defect during the present invention is realized：
Code book extension and selection mechanism during the codebook subset limitation defined in LTE specification and 3GPP are discussed at present, it is general All over the control strategy employed on the basis of network side.However, because network side is difficult to obtain complete channel condition information, The situation of eNB sides is only accounted for during CSR, therefore is unfavorable for making codebook subset selection with terminal self-characteristic match, than Such as, the detection algorithm (i.e. reception processing algorithm) that can not embody UE limits codebook subset the applicability of mode.Covered when existing more During available code book (a possible direction of descending MIMO feedbacks enhancing), above mentioned problem is especially prominent.
The content of the invention
The embodiment of the present invention provides a kind of information feedback method and device based on code book, in the information based on code book In feedback procedure, the selection of pre-coding matrix and the characteristic of terminal is set to match.
Information feedback method provided in an embodiment of the present invention based on code book, including：
The pre-coding matrix set that terminal uses when selecting feedback from available code book according to transmission characteristic or terminal capability, And to the pre-coding matrix set that goes out selected by network equipment instruction；
The pre-coding matrix set that the terminal goes out selected by determines the number of data streams that the terminal is supported, according to It is selected go out pre-coding matrix collection be combined into the pre-coding matrix that the time frequency unit for needing to carry out feedback of the information determines to recommend, and root Channel quality information is determined according to the pre-coding matrix of recommendation；
The terminal reports the mark corresponding to the pre-coding matrix of recommendation to the network equipment, and the number determined According to stream quantity and channel quality information.
The information feedback method based on code book that another embodiment of the present invention provides, including：
The configured information that network equipment receiving terminal is sent, the configured information are used to indicate to use during the terminal feedback Pre-coding matrix set；Wherein, the pre-coding matrix set is the terminal according to transmission characteristic or terminal capability from can With what is chosen in code book；
The network equipment receives the pre-coding matrix mark and data flow that the terminal that the terminal reports is recommended Quantity and channel quality information；Wherein, the pre-coding matrix recommended is the terminal from precoding that is selected and indicating Chosen in set of matrices, the number of data streams reported is the terminal according to precoding square that is selected and indicating Battle array set determines that the channel quality information reported is that the terminal is determined according to the pre-coding matrix recommended 's；
Number of data streams and channel quality information that the network equipment reports according to the terminal and recommendation prelist Code matrix identification is transmitted processing.
Terminal device provided in an embodiment of the present invention, including：
Selecting unit, for according to transmission characteristic or terminal capability, what is used when selecting feedback from available code book to prelist Code set of matrices；
Determining unit, for determining what the terminal was supported according to the pre-coding matrix set that the uses during feedback selected Number of data streams, according to it is selected go out pre-coding matrix collection be combined into need carry out feedback of the information time frequency unit determine recommend Pre-coding matrix, and channel quality information is determined according to the pre-coding matrix of recommendation；
Reporting unit, for the pre-coding matrix set for indicating to go out selected by the selecting unit to the network equipment；And The mark corresponding to pre-coding matrix for reporting the determining unit to recommend to the network equipment, and the determining unit are true The number of data streams and channel quality information made.
The network equipment provided in an embodiment of the present invention, including：
First receiving unit, the configured information sent for receiving terminal, the configured information are used to indicate the terminal The pre-coding matrix set used during feedback；Wherein, the pre-coding matrix set is the terminal according to transmission characteristic or end What end ability chose from available code book；
Second receiving unit, for receiving pre-coding matrix mark and the number that the terminal that the terminal reports is recommended According to stream quantity and channel quality information；Wherein, the pre-coding matrix recommended is the terminal from selected and indicate pre- Chosen in encoder matrix set, the number of data streams reported is the terminal selected by and what is indicated prelists Code set of matrices determines that the channel quality information reported is that the terminal determines according to the pre-coding matrix recommended Out；
Processing unit, for prelisting for the number of data streams and channel quality information that are reported according to the terminal and recommendation Code matrix identification is transmitted processing.
In the above embodiment of the present invention, because terminal determines to carry out the pre-coding matrix collection that uses of feedback of the information first Close, then determine from the pre-coding matrix set pre-coding matrix recommended, and it is determined that during pre-coding matrix set, based on end End transmission characteristic or terminal capability are selected, therefore the selection of pre-coding matrix and the characteristic of terminal is matched.
Brief description of the drawings
Fig. 1 is one of feedback of the information schematic flow sheet provided in an embodiment of the present invention based on code book；
Fig. 2 is the two of the feedback of the information schematic flow sheet provided in an embodiment of the present invention based on code book；
Fig. 3 is the structural representation of terminal device provided in an embodiment of the present invention；
Fig. 4 is the structural representation of the network equipment provided in an embodiment of the present invention.
Embodiment
The embodiment of the present invention is applied to LTE system, or uses and carry out being based on code with the same or analogous mode of LTE system The wireless communication system of this feedback of the information.
The overall procedure of feedback of the information provided in an embodiment of the present invention based on code book may include：
The pre-coding matrix set that terminal uses when selecting feedback from available code book according to transmission characteristic or terminal capability, And to the pre-coding matrix set that goes out selected by network equipment instruction；The pre-coding matrix set that the terminal goes out selected by Determine the number of data streams that the terminal is supported, according to it is selected go out pre-coding matrix collection be combined into and need to carry out feedback of the information Time frequency unit determines the pre-coding matrix recommended, and determines channel quality information according to the pre-coding matrix of recommendation；The terminal The mark corresponding to the pre-coding matrix of recommendation is reported to the network equipment, and the number of data streams and channel matter determined Measure information.
The embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
Referring to Fig. 1, the feedback of the information schematic flow sheet based on code book provided for one embodiment of the present of invention, as schemed institute Show, the flow may include：
Step 102：Terminal receives detection algorithm according to transmission characteristic, such as channel measurement and signal, from available codes The pre-coding matrix set used when selecting feedback in this.
In the step, terminal can be received according to the signal used to measurement of the down channel with interference and the terminal and examined Method of determining and calculating, selected from available code book for data transmission performance precoding mode the most favourable.When channel show compared with It can select to pass for high associated scenario and MU-MIMO (Multi-User MIMO, multiuser MIMO) during high spatial coherence The code book of defeated optimization or pre-coding matrix set, it is on the contrary then can select for low associated scenario and SU-MIMO (Single- User MIMO, Single User MIMO) transmission optimization code book or pre-coding matrix set；Suppress spatial selectivity when terminal has , can also choice accuracy be relatively low but feedback overhead also less code in relative complex disturbed condition during the ability of interference Sheet or pre-coding matrix set, on the contrary feedback accuracy and the higher code book of expense or pre-coding matrix set can be selected.
When carrying out feedback of the information based on compound code book, it is basic as pre-coding matrix Resource selection in the step " can With code book " for the compound code book indicated by the compound code book or the network equipment defined in agreement.When carrying out letter based on more set code books During breath feedback, " can use code book " in the step as pre-coding matrix Resource selection basis is more set code books of agreement defined The codebook set that more set code books indicated by the codebook set or the network equipment formed are formed, further, the step Middle " can use code book " as pre-coding matrix selection basis is indicated by more the set code book or the network equipment of agreement defined The codebook set that is formed of more set code books in, its code book that can be supported or code that terminal is determined according to the ability of the terminal This set.
Step 103：The pre-coding matrix set gone out selected by terminal to network equipment instruction.The network equipment refers to need The equipment for wanting terminal feedback information, in LTE system, the network equipment refers to eNB.
Step 104：Terminal determines the number of data streams of terminal support according to the pre-coding matrix set selected, according to It is selected go out pre-coding matrix collection be combined into the pre-coding matrix that the time frequency unit for needing to carry out feedback of the information determines to recommend, and root Channel quality information is determined according to the pre-coding matrix of recommendation.
Step 105：Terminal reports the mark corresponding to the pre-coding matrix of recommendation to the network equipment, and the number determined According to stream quantity and channel quality information.
In above-mentioned steps 104~105, terminal can be according to the pre-coding matrix of recommendation to by the data after precoding Transmission quality is prejudged, and reports PMI corresponding to the pre-coding matrix that it recommends, the data that can be supported to the network equipment Stream quantity (number of data streams is represented with RI) and the getable channel quality information of institute after the PMI and RI that it reports is used (channel quality can represent with CQI, CQI：Channel Quality Indication, channel quality identification).
Be can be seen that by the flow shown in Fig. 1 for the network equipment (such as eNB), down channel measurement with During information feedback, terminal can more accurately obtain channel and disturbed condition, and only terminal itself Relatively accurately the effect of precoding and link circuit self-adapting could be prejudged according to the detection algorithm that it is used.Such case Under, in the scheme that the embodiment of the present invention proposes, because the selection course of code book and its subset is largely independently determined by terminal Calmly, the code book and its subset used during feedback can preferably be applied to the detection algorithm of current application scenarios and terminal, and And realize the dynamic select of code book and codebook subset.
In flow shown in Fig. 1, terminal can carry out letter based on compound code book or based on the codebook set that more set code books are formed Breath feedback.Separately below feedback of the information is carried out with terminal based on compound code book and based on the codebook set that more set code books are formed Exemplified by, further the flow shown in Fig. 1 is described in detail.
(1) feedback of the information is carried out based on compound code book
In the case that terminal is based on compound code book progress feedback of the information, in a step 102, terminal is selected in compound code book A subset, the pre-coding matrix included in the subset constitute the pre-coding matrix collection that the terminal used during feedback of the information Close.
In step 103, terminal is by the subset of the compound code book gone out selected by being indicated to the network equipment, by what is selected Pre-coding matrix set is indicated to the network equipment.Specifically, the embodiments of the invention provide following two preferred implementations：
Mode one：The subset that the pre-coding matrix that being marked using bitmap modes can use in compound code book is formed. For example N number of pre-coding matrix in compound code book being present, then terminal sends the configured information of N number of bit length to the network equipment, its In every bit to should be in compound key sheet a pre-coding matrix.In the configured information, if pre-coding matrix institute The value of corresponding bit is 1, then it represents that the pre-coding matrix is the member in the pre-coding matrix set gone out selected by terminal； If the value of the bit corresponding to precoding is 0, then it represents that the pre-coding matrix is not the precoding square gone out selected by terminal Member in battle array set.
Mode two：Compound code book is subjected to subset division in advance, each subset obtained to division is numbered, wherein, respectively The numbering of subset takesIndividual bit, wherein M represent the quantity for the subset that division obtains,Expression rounds up (i.e. Take and compare log2Smallest positive integral big M).The numbering of each subset of compound code book and the pre-coding matrix wherein included, it is in advance Known to the network equipment and terminal, for example it can define in the protocol, or the network equipment is indicated to terminal by high-level signaling.This Sample, terminal when the pre-coding matrix selected set is indicated into the network equipment, can by it is selected go out compound code book Numbering corresponding to subset is sent to the network equipment, so that what the network equipment went out according to selected by the numbering of the subset knows terminal Pre-coding matrix set.When carrying out subset division to compound code book, the part included in each subset in the compound code book is pre- Encoder matrix, the pre-coding matrix in each subset are incomplete same.Preferably, can be according to the quantity of intended application scene and specific Situation determines to divide the pre-coding matrix included in obtained subset quantity and each subset.
In step 105, following two preferred embodiments can be used to report the pre-coding matrix institute of recommendation right to the network equipment The mark answered：
Mode one：Terminal reports numbering of the pre-coding matrix of recommendation in affiliated compound code book (i.e. to the network equipment PMI).In which, the PMI that terminal reports continues to use coding rule of the current pre-coding matrix in compound code book belonging to it.This In kind mode, the bit number of the PMI occupancy reported is not with the selected pre-coding matrix set for being used to carry out feedback of the information The quantity of pre-coding matrix and change.
Mode two：In the way of step 103, subset division and numbering are carried out to compound code book in advance, and to each subset In pre-coding matrix (such as since 1 sequentially) is numbered.Using in some subset altogether comprising L pre-coding matrix as Example, useEach pre-coding matrix in the subset is numbered individual bit, i.e., the bit length each numbered isWherein, L represents the pre-coding matrix quantity in the subset,Expression rounds up.The coding rule is in advance for eventually Known to end and the network equipment, for example it can define in the protocol, or the network equipment is indicated to terminal by high-level signaling.So, Terminal can make the network equipment by the numbering for reporting the pre-coding matrix of recommendation to be concentrated in affiliated compound key book to the network equipment The pre-coding matrix set gone out according to selected by the content that terminal in step 103 reports determines terminal, and combine in step 105 eventually The numbering of the pre-coding matrix reported is held, the pre-coding matrix that terminal is recommended is determined from the pre-coding matrix set.Adopt In this way, the numbering for the pre-coding matrix that terminal reports is with the size of the compound codebook subset gone out selected by the terminal (quantity of the pre-coding matrix i.e. included in compound key book collection) and change.Feedback PMI expense be possible to The change of the size of the selected pre-coding matrix set for being used to feed back of terminal and reduce.
(2) codebook set formed based on more set code books carries out feedback of the information
In the case that terminal carries out feedback of the information based on the codebook set that more set code books are formed, before step 102, also It may include step 101：The mark corresponding to code book that base station is currently supported to terminal notification by high-level signaling, make terminal can be with Pre-coding matrix is selected from codebook set.If acquiescence supports all code books defined in specification, step can be omitted 101。
In a step 102, terminal can select pre-coding matrix collection using any one following mode from codebook set Close：
Mode one：The code book that terminal uses when selecting a code book to be fed back as it from codebook set, in the code book All pre-coding matrixes constitute the pre-coding matrix set that the terminal used during feedback of the information.
Mode two：Terminal selects multiple (i.e. two or more) code books from codebook set, and from the plurality of code book In each code book in select some pre-coding matrixes, it is selected go out these pre-coding matrixes constitute the terminal and enter row information The pre-coding matrix set used during feedback.For example, after terminal-pair downlink reference signal takes multiple measurements, if preferable pre- Among encoder matrix belongs to some subsets in certain several code book, or certain several code book substantially, then terminal can select these The set used when code book and its subset are as feedback.
In step 103, the difference of the mode of pre-coding matrix set is selected in a step 102 according to terminal, terminal is adopted With the following methods to the pre-coding matrix set gone out selected by network equipment instruction：
In the case of selecting pre-coding matrix set using aforesaid way one in a step 102, in step 103, terminal will The mark for the code book selected is sent to the network equipment, so that the network equipment is pre- according to selected by code book mark knows terminal Encoder matrix set.
In the case of selecting pre-coding matrix set using aforesaid way two in a step 102, in step 103, terminal is led to Cross to the mark of code book and the subset of the code book gone out selected by network equipment instruction, the pre-coding matrix set that will be selected It is indicated to the network equipment.The embodiments of the invention provide following two preferred implementations：
Mode one：The subset that the pre-coding matrix that being marked using bitmap modes can use in code book is formed.Terminal To the mark of each code book gone out selected by network equipment transmission, and bitmap corresponding to wherein each code book, so that the network equipment Know the pre-coding matrix set selected by terminal.
Mode two：Subset division is carried out to each code book in codebook set in advance, each subset obtained to division is compiled Number, wherein, the numbering of each subset takesIndividual bit, M represent the quantity for the subset that division obtains,Expression takes upwards It is whole.The numbering of each subset and the pre-coding matrix wherein included, in advance known to the network equipment and terminal, such as can be in agreement Defined in, or the network equipment is indicated to terminal by high-level signaling.So, terminal is in the pre-coding matrix set that will be selected When being indicated to the network equipment, can by it is selected go out the mark of code book and the subset of the code book corresponding to numbering be sent to The network equipment, so that the precoding that the network equipment goes out according to selected by the mark of the code book and the numbering of codebook subset know terminal Set of matrices.When carrying out subset division to code book, the part pre-coding matrix in the code book, each subset are included in each subset In pre-coding matrix it is incomplete same.
In step 103, the number of bits shared by the mark for the code book that terminal is reported and alternative codebook number Amount is related, such as, if shared N sets code book is alternative, can be usedEach code book is numbered individual bit.
In step 105, following two preferred embodiments can be used to report the pre-coding matrix institute of recommendation right to the network equipment The mark answered：
Mode one：Terminal reports numbering (i.e. PMI) of the pre-coding matrix of recommendation in affiliated code book to the network equipment, So, the pre-coding matrix set that the network equipment can be according to selected by the content that terminal in step 103 reports determines terminal, and According to the numbering of the pre-coding matrix reported in step 105, determine that terminal is recommended pre- from the pre-coding matrix set Encoder matrix.In which, the PMI that terminal reports continues to use coding rule of the current pre-coding matrix in its affiliated code book.
Mode two：(the precoding is numbered in each pre-coding matrix in the pre-coding matrix set that terminal-pair is selected Pre-coding matrix in set of matrices comes from one or more of codebook set code book), and report wherein recommended pre- Numbering of the encoder matrix in the pre-coding matrix set.Exemplified by including L pre-coding matrix altogether in pre-coding matrix set, UseEach pre-coding matrix in the pre-coding matrix set is numbered individual bit, i.e., the bit each numbered Bit length isWherein, L represents the pre-coding matrix quantity in the pre-coding matrix,Expression rounds up.The volume Number rule is in advance for known to terminal and the network equipment, for example coding rule can define in the protocol, or the network equipment passes through height Layer signaling is indicated to terminal.So, after terminal reports the numbering of recommended pre-coding matrix to the network equipment, the network equipment Pre-coding matrix set that can be according to selected by the content that terminal reports in step 103 determines terminal, and combine step 105 The numbering for the pre-coding matrix that middle terminal reports, the precoding square that terminal is recommended is determined from the pre-coding matrix set Battle array.In this way, the numbering for the pre-coding matrix that terminal reports with the feedback gone out selected by the terminal when use it is pre- The size (quantity of the pre-coding matrix i.e. included in pre-coding matrix set) of encoder matrix set and change.
Implementation in view of being limited to terminal, terminal may can only support one or several sons in compound code book Collection, or one or several code books in the codebook set of more set code books compositions can only be supported.According to the situation, of the invention is another In the feedback of the information flow based on code book that one embodiment provides, it can be entered according to the code book or codebook subset that terminal can be supported Row information is fed back.
Referring to Fig. 2, the feedback of the information schematic flow sheet based on code book provided for another embodiment of the present invention, as schemed institute Show, the flow may include：
Step 202：Terminal is according to the ability of the terminal, the pre-coding matrix set that selection uses when feeding back.
When it is implemented, by quantifying to the ability of terminal, the ability rating of terminal can be obtained.Terminal herein Ability includes：In precoding set when terminal-pair code book is stored or ability, the feedback of code book is generated according to calculation formula In the ability that scans for etc..The corresponding relation of terminal capability grade and pre-coding matrix set is pre-set, the corresponding relation The code book that possesses the terminal of different abilities and can be supported has been reflected (in the case of feedback of the information is carried out based on more set code books) Or possesses the codebook subset that the terminal of different abilities can be supported (in the case of feedback of the information is carried out based on compound code book).Should Corresponding relation is in advance known to terminal and the network equipment, for example provide in the protocol, or the network equipment is referred to by high-level signaling Show to terminal.In the step, terminal can select pre-coding matrix corresponding with the ability rating of the terminal according to the corresponding relation Set.
For example when terminal is based on compound code book progress feedback of the information, K subset is shared in compound code book, is numbered respectively For subset 1 to subset K, then the corresponding relation of codebook subset of the ability rating of terminal with being supported can be as shown in table 1：
The corresponding relation of table 1, the ability rating of terminal and codebook subset
For another example, when terminal carries out feedback of the information based on the codebook set that more set code books are formed, N is shared in codebook set Individual code book, numbering is code book 1 to code book N respectively, then the corresponding relation of the ability rating of terminal and the code book supported can be such as table 2 It is shown：
The corresponding relation of table 2, the ability rating of terminal and code book
Step 203：The pre-coding matrix set gone out selected by terminal to network equipment instruction.
In the step, terminal can using with by the way of corresponding steps in flow shown in Fig. 1, to the network equipment instruction selected by The pre-coding matrix set selected out.Preferably, can also be by the ability rating information reporting of terminal to the network equipment, so that network Equipment knows the pre-coding matrix gone out selected by the terminal according to terminal capability grade and the corresponding relation of pre-coding matrix set Set.
Step 204：Terminal determines the number of data streams of terminal support according to the pre-coding matrix set selected, according to The pre-coding matrix collection selected be combined into need carry out feedback of the information time frequency unit determine recommend pre-coding matrix, and according to The pre-coding matrix of recommendation determines channel quality information.
Step 205：Terminal reports the mark corresponding to the pre-coding matrix of recommendation to the network equipment, and the number determined According to stream quantity and channel quality information.
The specific implementation of above-mentioned steps 204~205 can be with the implementation of step 104~105 in Fig. 1, herein not It is described in detail again.
The flow of feedback of the information is carried out according to above end side, the handling process of the network equipment may include：
Step 301：The configured information that network equipment receiving terminal is sent, the configured information are used to indicate that the terminal is anti- The pre-coding matrix set used during feedback.Wherein, the pre-coding matrix set is the terminal according to transmission characteristic or terminal What ability chose from available code book.Terminal selects pre-coding matrix set and gone out to selected by network equipment instruction The mode of pre-coding matrix set is as it was previously stated, will not be described in detail herein.
Step 302：The network equipment receives pre-coding matrix mark and the number that the terminal that the terminal reports is recommended According to stream quantity and channel quality information；Wherein, the pre-coding matrix recommended is the terminal from selected and indicate pre- Chosen in encoder matrix set, the number of data streams reported is the terminal selected by and what is indicated prelists Code set of matrices determines that the channel quality information reported is that the terminal determines according to the pre-coding matrix recommended Out.The mode that the pre-coding matrix and progress above- mentioned information that terminal selection is recommended report is as it was previously stated, no longer detailed herein State.
Step 303：Number of data streams and channel quality information that the network equipment reports according to terminal and recommendation prelist Code matrix identification is transmitted processing.Specifically, number of data streams (RI) and channel that the network equipment can feed back according to terminal Quality information (CQI) determines the modulation coding mode and transport block size when next time dispatches, and can be recommended according to terminal pre- Encoder matrix carries out precoding to downlink data transmission, and for selecting the terminal dispatched jointly during MU-MIMO transmission.
By above description as can be seen that because in the embodiment of the present invention, terminal determines to be used to carry out feedback of the information first Pre-coding matrix set, then determine from the pre-coding matrix set pre-coding matrix recommended, and it is determined that precoding square During battle array set, based on channel measurement and terminal used by signal receive detection algorithm or the ability based on terminal, because This makes the selection of pre-coding matrix and the characteristic of terminal match.In addition, in the embodiment of the present invention, when terminal is on the network equipment When reporting the numbering for the pre-coding matrix recommended, line renumbering, and root can be entered to the pre-coding matrix in pre-coding matrix set The pre-coding matrix recommended according to the result reporting terminal renumberd, make bit number shared by the numbering of pre-coding matrix with It is selected go out the size of pre-coding matrix set be adapted, save feedback overhead.
Based on identical technical concept, the embodiment of the present invention additionally provides a kind of terminal device.
Referring to Fig. 3, for the structural representation of terminal device provided in an embodiment of the present invention, the terminal device may include：Choosing Unit 31, determining unit 32, reporting unit 33 are selected, can also further comprise receiving unit 34, wherein：
Selecting unit 31, for according to transmission characteristic or terminal capability, being used when selection is fed back from available code book pre- Encoder matrix set；
Determining unit 32, for selected according to selecting unit 31 feedback when the pre-coding matrix set that uses determine institute State terminal support number of data streams, according to it is selected go out pre-coding matrix collection be combined into need carry out feedback of the information time-frequency list Member determines the pre-coding matrix recommended, and determines channel quality information according to the pre-coding matrix of recommendation；
Reporting unit 33, for the pre-coding matrix set for indicating to go out selected by selecting unit 31 to the network equipment；And The mark corresponding to pre-coding matrix for reporting determining unit 32 to recommend to the network equipment, and determining unit 32 are determined Number of data streams and channel quality information.
It is described with code book be a set of compound code book in the case of, selecting unit 31 is according to channel measurement and signal Receive the subset that the pre-coding matrix collection that detection algorithm is selected from available code book is combined into the compound code book, reporting unit 33 By the subset of the compound code book gone out selected by being indicated to the network equipment, the pre-coding matrix set selected is indicated to described The network equipment；Or in the case of the codebook set formed with code book for more set code books, selecting unit 31 is according to letter Road measurement result and signal receive the pre-coding matrix collection that detection algorithm is selected from available code book and are combined into from the code book collection The code book selected in conjunction, reporting unit 33 will be selected by the mark of the code book gone out selected by being sent to the network equipment The pre-coding matrix set gone out is indicated to the network equipment；Or in the code book formed with code book for more set code books In the case of set, selecting unit 31 prelists according to what channel measurement and signal reception detection algorithm were selected from code book Code set of matrices is the subset of each code book at least 2 sets of code books in the codebook set, and reporting unit 33 is by the network equipment Selected code book and its subset are indicated, the pre-coding matrix set selected is indicated to the network equipment.
Wherein, reporting unit 33 is specifically used for：Configured information, the bit that the configured information takes are sent to the network equipment Digit is the quantity of the pre-coding matrix in the compound code book, and every bit is corresponding pre- in the compound code book for identifying Whether encoder matrix is member in the pre-coding matrix set gone out selected by the terminal；Or in advance to the compound key This progress subset division, each subset obtained to division are numbered, wherein, the numbering of each subset takesIndividual ratio Spy, M represent the quantity for the subset that division obtains,Expression rounds up, reporting unit 33 by it is selected go out compound key book The corresponding numbering of collection is sent to the network equipment.
Specifically, reporting unit 33 is specifically used for：For the often set code book at least 2 sets of code books described in selecting, to The network equipment sends the mark and configured information of code book, and the number of bits that the configured information takes is to be prelisted in code book The quantity of code matrix, wherein every bit is used to identify whether corresponding pre-coding matrix in code book is to go out selected by the terminal Pre-coding matrix set in member；Or subset division is carried out to the often set code book in the codebook set in advance, to drawing Each subset got is numbered, wherein, the numbering of each subset takesIndividual bit, M represent to carry out subset division Code book divide the quantity of obtained subset,Expression rounds up, and reporting unit 33 is for described in selecting at least 2 The often set code book in code book is covered, it is right to the subset institute that the network equipment sends the mark of code book and is selected from the code book The numbering answered.
In the case where being a set of compound code book as the available code book on pre-coding matrix Resource selection basis, the terminal With the corresponding relation that terminal capability grade and compound codebook subset are provided with the network equipment, the corresponding relation shows respectively The pre-coding matrix set that the terminal of ability rating is supported.Accordingly, selecting unit 31 according to terminal capability from available code book In the pre-coding matrix collection selected be combined into compound codebook subset corresponding with the ability rating of the terminal, reporting unit 33 is logical The ability rating information that the terminal is sent to the network equipment is crossed, the pre-coding matrix set selected is indicated to the network Equipment.Or the feelings of the codebook set formed in the available code book as pre-coding matrix Resource selection basis for more set code books Under condition, terminal capability grade pass corresponding with the code book in the codebook set is provided with the terminal and the network equipment System, the corresponding relation show the code book that the terminal of each ability rating is supported, selecting unit 31 is according to terminal capability from code book In the pre-coding matrix collection selected be combined into pre-coding matrix in code book corresponding with the ability rating of the terminal, upper declaration form Member 33 is by the way that to the ability rating information of the network equipment transmission terminal, institute is indicated to by the pre-coding matrix set selected State the network equipment.
Specifically, reporting unit 33 reports numbering of the pre-coding matrix of recommendation in affiliated code book to the network equipment；Or Each pre-coding matrix in the pre-coding matrix set selected is numbered for person, reporting unit 33, each pre-coding matrix Numbering takesIndividual bit, wherein, L represents the pre-coding matrix quantity in the pre-coding matrix set that terminal is selected,Expression rounds up；By sending the pre-coding matrix recommended in selected pre-coding matrix set to the network equipment Numbering, the mark corresponding to the pre-coding matrix of recommendation is reported to the network equipment.
Further, receiving unit 34 is current for receiving the network equipment that the network equipment is sent by high-level signaling Each self-corresponding mark of more set code books supported；Accordingly, more set code books that selecting unit 31 receives according to receiving unit 34 Each self-corresponding mark, the pre-coding matrix set used when selecting feedback from corresponding more set code books.
Referring to Fig. 4, for the structural representation of the network equipment provided in an embodiment of the present invention.The network equipment can be base station Equipment.As illustrated, the network equipment may include：First receiving unit 41, the second receiving unit 42, processing unit 43, enter one Step, transmitting element 44 is may also include, wherein：
First receiving unit 41, the configured information sent for receiving terminal, the configured information are used to indicate the end The pre-coding matrix set used during the feedback of end；Wherein, the pre-coding matrix set be the terminal according to transmission characteristic or What terminal capability chose from available code book；
Second receiving unit 42, for receive pre-coding matrix mark that the terminal that the terminal reports recommends and Number of data streams and channel quality information；Wherein, the pre-coding matrix recommended is the terminal from selected and indicate Chosen in pre-coding matrix set, the number of data streams reported is the terminal selected by and indicated pre- Encoder matrix set determines that the channel quality information reported is that the terminal is true according to the pre-coding matrix recommended Fix；
Processing unit 43, for the pre- of the number of data streams and channel quality information that are reported according to the terminal and recommendation Encoder matrix mark is transmitted processing.
It is described be a set of compound code book with code book in the case of, the instruction of configured information that the first receiving unit 41 receives Go out the subset that the terminal is selected from compound code book；Or the codebook set formed with code book for more set code books In the case of, the configured information that the first receiving unit 41 receives indicates one that the terminal is selected from codebook set Code book；Or in the case of the codebook set formed with code book for more set code books, what the first receiving unit 41 received Configured information indicates at least 2 sets of code books and its subset that the terminal is selected from codebook set.
Wherein, it is described be a set of compound code book with code book in the case of, the number of bits that the configured information takes is The quantity of pre-coding matrix in the compound code book, every bit are used to identify corresponding precoding square in the compound code book Whether battle array is member in the pre-coding matrix set gone out selected by the terminal；Or the compound code book is carried out in advance Subset division, each subset obtained to division are numbered, wherein, the numbering of each subset takesIndividual bit, M are represented The quantity of obtained subset is divided,Expression rounds up, and the configured information is the compound code book gone out selected by the terminal Numbering corresponding to subset.
In the case of the codebook set formed with code book for more set code books, the configured information includes the terminal It is selected go out at least 2 sets of code books in the mark for often covering code book and the subset configured information for often covering code book, the subset refers to The number of bits for showing information occupancy is the quantity of pre-coding matrix in code book, wherein every bit is corresponding in code book for identifying Whether pre-coding matrix is member in the pre-coding matrix set gone out selected by the terminal；Or in advance to the code book Often set code book in set carries out subset division, and each subset obtained to division is numbered, wherein, the numbering of each subset takesIndividual bit, M represent that the code book for carrying out subset division divides the quantity of obtained subset,Expression rounds up, The configured information is the mark for often covering code book and the son for often covering code book at least 2 sets of code books gone out selected by the terminal The numbering of collection.
It is described with code book be a set of compound code book in the case of, be provided with terminal on the terminal and the network equipment The corresponding relation of ability rating and compound codebook subset, the corresponding relation show that what the terminal of each ability rating supported prelists Code set of matrices；The configured information that first receiving unit 41 receives is the ability rating of the terminal.Or it is described can In the case of with codebook set of the code book for more set code books compositions, terminal capability is provided with the terminal and the network equipment Grade and the corresponding relation of the code book in the codebook set, the corresponding relation show what the terminal of each ability rating was supported Code book；The configured information that first receiving unit 41 receives is the ability rating of the terminal.
The pre-coding matrix that the terminal that second receiving unit 42 receives is recommended is identified as the pre-coding matrix in affiliated code Numbering in this.Or second the pre-coding matrix recommended of the terminal that receives of receiving unit 42 be identified as the precoding of recommendation Matrix is in the numbering selected by the terminal and in the pre-coding matrix set that indicates；Wherein, the terminal-pair is selected Each pre-coding matrix in pre-coding matrix set is numbered, and the numbering of each pre-coding matrix takesIndividual bit, its In, L represents the pre-coding matrix quantity in the pre-coding matrix set that terminal is selected,Expression rounds up.
Further, transmitting element can by high-level signaling to the terminal send the network equipment currently support it is more Each self-corresponding mark of code book is covered, for indicating the terminal according to each self-corresponding mark of more set code books received, from right The pre-coding matrix set used when selecting feedback in the more set code books answered.
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in individual square frame or multiple square frames.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to comprising including these changes and modification.

Claims (22)

1. a kind of information feedback method based on code book, it is characterised in that methods described includes：
The pre-coding matrix set that terminal uses when selecting feedback from available code book according to transmission characteristic or terminal capability, and to The pre-coding matrix set gone out selected by network equipment instruction；
The pre-coding matrix set that the terminal goes out selected by determines the number of data streams that the terminal is supported, according to selected The pre-coding matrix collection selected out is combined into the pre-coding matrix that the time frequency unit for needing to carry out feedback of the information determines to recommend, and according to pushing away The pre-coding matrix recommended determines channel quality information；
The terminal reports the mark corresponding to the pre-coding matrix of recommendation to the network equipment, and the data flow determined Quantity and channel quality information；
Wherein, the pre-coding matrix set used when the terminal selects feedback according to transmission characteristic from available code book, and to The pre-coding matrix set gone out selected by network equipment instruction, including：
Described with code book is a set of compound code book, the precoding that the terminal is selected according to transmission characteristic from available code book Set of matrices is the subset of the compound code book, and the terminal passes through the son of the compound code book gone out selected by being indicated to the network equipment Collection, the network equipment is indicated to by the pre-coding matrix set selected；Or
The codebook set formed with code book for more set code books, the terminal select according to transmission characteristic from available code book The pre-coding matrix collection gone out is combined into the code book selected from the codebook set, and the terminal to the network equipment by sending out The mark of the code book gone out selected by sending, the network equipment is indicated to by the pre-coding matrix set selected；Or
The codebook set formed with code book for more set code books, the terminal select according to transmission characteristic from available code book The pre-coding matrix collection gone out is combined into the subset of each code book at least 2 sets of code books in the codebook set, and the terminal is by net The selected code book of network equipment instruction and its subset, the network equipment is indicated to by the pre-coding matrix set selected；
The pre-coding matrix set that the terminal uses when selecting feedback from available code book according to terminal capability, and set to network The pre-coding matrix set gone out selected by standby instruction, including：
Described with code book is a set of compound code book, be provided with the terminal and the network equipment terminal capability grade with it is multiple The corresponding relation of codebook subset is closed, the corresponding relation shows the pre-coding matrix set that the terminal of each ability rating is supported； The pre-coding matrix collection that the terminal is selected according to terminal capability from available code book is combined into the ability rating with the terminal Corresponding compound codebook subset；The terminal is by the ability rating information of the network equipment transmission terminal, will select Pre-coding matrix set be indicated to the network equipment；Or
It is described to use code book to be provided with terminal energy on the terminal and the network equipment for the codebook sets for covering code books and forming more Power grade and the corresponding relation of the code book in the codebook set, the corresponding relation show that the terminal of each ability rating is supported Code book；The pre-coding matrix collection that the terminal is selected according to terminal capability from available code book is combined into the energy with the terminal Code book corresponding to power grade；The terminal is by sending the ability rating information of the terminal to the network equipment, by what is selected Pre-coding matrix set is indicated to the network equipment.
2. the method as described in claim 1, it is characterised in that the terminal selects instead according to transmission characteristic from available code book The pre-coding matrix set used during feedback, is specifically included：Terminal receives detection algorithm according to channel measurement and signal, from can With the pre-coding matrix set used when selecting feedback in code book；
The pre-coding matrix set that the terminal uses when selecting feedback from available code book according to terminal capability, is specifically included： The terminal is according to the ability of terminal processes code book, the pre-coding matrix set used when selecting feedback from available code book.
3. the method as described in claim 1, it is characterised in that described to the compound code book gone out selected by network equipment instruction Subset, specifically include：
Configured information is sent to the network equipment, the number of bits that the configured information takes is the precoding in the compound code book The quantity of matrix, every bit are used to identify whether corresponding pre-coding matrix in the compound code book is selected by the terminal Member in the pre-coding matrix set gone out；
Or subset division is carried out to the compound code book in advance, each subset obtained to division is numbered, wherein, each son The numbering of collection takesIndividual bit, M represent the quantity for the subset that division obtains,Expression rounds up；The terminal By it is selected go out compound codebook subset corresponding to numbering be sent to the network equipment.
4. the method as described in claim 1, it is characterised in that described that selected code book and its son are indicated to the network equipment Collection, is specifically included：
For the often set code book at least 2 sets of code books described in selecting, to the network equipment send code book mark and Configured information, the number of bits that the configured information takes is the quantity of pre-coding matrix in code book, wherein every bit is used for Whether corresponding pre-coding matrix is member in the pre-coding matrix set gone out selected by the terminal in mark code book；
Or subset division is carried out to the often set code book in the codebook set in advance, each subset obtained to division is compiled Number, wherein, the numbering of each subset takesIndividual bit, the code book that M represents to carry out subset division divide obtained son The quantity of collection,Expression rounds up；For the often set code book at least 2 sets of code books described in selecting, the terminal is to institute State the network equipment send code book mark and the subset selected from the code book corresponding to numbering.
5. the method as described in Claims 1-4 any one, it is characterised in that the terminal reports recommendation to the network equipment Pre-coding matrix corresponding to mark, specifically include：
The terminal reports numbering of the pre-coding matrix of recommendation in affiliated code book to the network equipment；
Or each pre-coding matrix in the pre-coding matrix set selected of the terminal-pair is numbered, each precoding square The numbering of battle array takesIndividual bit, wherein, L represents the pre-coding matrix in the pre-coding matrix set that terminal is selected Quantity,Expression rounds up；The terminal sends the pre-coding matrix recommended in selected precoding square to the network equipment Numbering in battle array set.
6. the method as described in Claims 1-4 any one, it is characterised in that this method also includes：The terminal receives net Each self-corresponding mark of more set code books that the network equipment that network equipment is sent by high-level signaling is currently supported；
The pre-coding matrix set for selecting to use when feeding back from code book, is specifically included：The terminal is according to receiving More set each self-corresponding marks of code book, the pre-coding matrix set used when selecting feedback from corresponding more set code books.
7. a kind of information feedback method based on code book, it is characterised in that methods described includes：
The configured information that network equipment receiving terminal is sent, used when the configured information is for indicating the terminal feedback pre- Encoder matrix set；Wherein, the pre-coding matrix set is the terminal according to transmission characteristic or terminal capability from available codes Chosen in this；
The network equipment receives pre-coding matrix mark and the number of data streams that the terminal that the terminal reports is recommended And channel quality information；Wherein, the pre-coding matrix recommended is the terminal from pre-coding matrix that is selected and indicating Chosen in set, the number of data streams reported is the terminal according to pre-coding matrix collection that is selected and indicating Close what is determined, the channel quality information reported is that the terminal is determined according to the pre-coding matrix recommended；
The number of data streams and channel quality information and the precoding square of recommendation that the network equipment reports according to the terminal Battle array mark is transmitted processing；
Wherein, the pre-coding matrix set is that the terminal chooses according to transmission characteristic from available code book, including：
Described with code book is a set of compound code book, and the configured information that the network equipment receives indicates the terminal from multiple Close the subset selected in code book；Or the codebook set formed with code book for more set code books, the network equipment connect The configured information received indicates the code book that the terminal is selected from codebook set；Or described can be with code book The codebook set that more set code books are formed, the configured information that the network equipment receives indicate the terminal from codebook set At least 2 sets of code books and its subset selected；
The pre-coding matrix set is that the terminal chooses according to terminal capability from available code book, including：
Described with code book is a set of compound code book, be provided with the terminal and the network equipment terminal capability grade with it is multiple The corresponding relation of codebook subset is closed, the corresponding relation shows the pre-coding matrix set that the terminal of each ability rating is supported； The configured information is the ability rating of the terminal；Or the codebook set formed with code book for more set code books, institute State and terminal capability grade and the corresponding relation of the code book in the codebook set are provided with terminal and the network equipment, it is described Corresponding relation shows the code book that the terminal of each ability rating is supported；The configured information is the ability rating of the terminal.
8. method as claimed in claim 7, it is characterised in that it is described with code book be a set of compound code book in the case of, institute The number of bits for stating configured information occupancy is the quantity of the pre-coding matrix in the compound code book, and every bit is used to identify institute State whether corresponding pre-coding matrix in compound code book is member in the pre-coding matrix set gone out selected by the terminal；
Or subset division is carried out to the compound code book in advance, each subset obtained to division is numbered, wherein, each son The numbering of collection takesIndividual bit, M represent the quantity for the subset that division obtains,Expression rounds up；The instruction Information is the numbering corresponding to the compound codebook subset gone out selected by the terminal.
9. method as claimed in claim 7, it is characterised in that the codebook set formed with code book for more set code books In the case of, the configured information includes the mark for often covering code book at least 2 sets code books for going out selected by the terminal and often The subset configured information of code book is covered, the number of bits that the subset configured information takes is the quantity of pre-coding matrix in code book, Wherein every bit is used to identify whether corresponding pre-coding matrix in code book is the pre-coding matrix gone out selected by the terminal Member in set；
Or subset division is carried out to the often set code book in the codebook set in advance, each subset obtained to division is compiled Number, wherein, the numbering of each subset takesIndividual bit, the code book that M represents to carry out subset division divide obtained son The quantity of collection,Expression rounds up；The configured information is the often set at least 2 sets of code books gone out selected by the terminal The mark of code book and the often numbering of the subset of set code book.
10. the method as described in claim 7 to 9 any one, it is characterised in that the pre-coding matrix of recommendation is identified as recommendation Numbering of the pre-coding matrix in affiliated code book；
Or the pre-coding matrix of recommendation is identified as the pre-coding matrix of recommendation selected by the terminal and what is indicated prelists Numbering in code set of matrices；Wherein, each pre-coding matrix in the pre-coding matrix set that the terminal-pair is selected is carried out Numbering, the numbering of each pre-coding matrix takeIndividual bit, wherein, L represents the pre-coding matrix set that terminal is selected In pre-coding matrix quantity,Expression rounds up.
11. the method as described in claim 7 to 9 any one, it is characterised in that this method also includes：The network equipment Each self-corresponding mark of more set code books currently supported to the terminal transmission network equipment by high-level signaling, for referring to Show that the terminal according to each self-corresponding mark of more set code books received, selects to use during feedback from corresponding more set code books Pre-coding matrix set.
A kind of 12. terminal device, it is characterised in that including：
Selecting unit, for according to transmission characteristic or terminal capability, the precoding square used when feeding back to be selected from available code book Battle array set；
Determining unit, for determining data that the terminal supports according to the pre-coding matrix set that the uses during feedback selected Flow quantity, according to it is selected go out pre-coding matrix collection be combined into need carry out feedback of the information time frequency unit determine recommend prelist Code matrix, and channel quality information is determined according to the pre-coding matrix of recommendation；
Reporting unit, for the pre-coding matrix set for indicating to go out selected by the selecting unit to the network equipment；And to institute The mark corresponding to the pre-coding matrix that the network equipment reports the determining unit to recommend is stated, and the determining unit is determined Number of data streams and channel quality information；
Wherein, the selecting unit is used for according to transmission characteristic, the pre-coding matrix used when selecting feedback from available code book Set, including：
Described with code book is a set of compound code book, and the selecting unit is selected pre- according to transmission characteristic from available code book Encoder matrix collection is combined into the subset of the compound code book, and the reporting unit is compound by going out selected by being indicated to the network equipment The subset of code book, the pre-coding matrix set selected is indicated to the network equipment；Or
The codebook set formed with code book for more set code books, the selecting unit is according to transmission characteristic from available code book The pre-coding matrix collection selected is combined into the code book selected from the codebook set, and the reporting unit is by net The mark of the code book gone out selected by the transmission of network equipment, the network equipment is indicated to by the pre-coding matrix set selected；Or Person,
The codebook set formed with code book for more set code books, the selecting unit is according to transmission characteristic from available code book The pre-coding matrix collection selected is combined into the subset of each code book at least 2 sets of code books in the codebook set, the reporting unit By indicating selected code book and its subset to the network equipment, the pre-coding matrix set selected is indicated to the network Equipment；
Wherein, the selecting unit is used to, according to transmission characteristic or terminal capability, use when selecting feedback from available code book Pre-coding matrix set, including：
Described with code book is a set of compound code book, be provided with the terminal and the network equipment terminal capability grade with it is multiple The corresponding relation of codebook subset is closed, the corresponding relation shows the pre-coding matrix set that the terminal of each ability rating is supported； The pre-coding matrix collection that the selecting unit is selected according to terminal capability from available code book is combined into the ability with the terminal Compound codebook subset corresponding to grade；The reporting unit by sending the ability rating information of the terminal to the network equipment, The pre-coding matrix set selected is indicated to the network equipment；Or
It is described to use code book to be provided with terminal energy on the terminal and the network equipment for the codebook sets for covering code books and forming more Power grade and the corresponding relation of the code book in the codebook set, the corresponding relation show that the terminal of each ability rating is supported Code book；The pre-coding matrix collection that the selecting unit is selected according to terminal capability from code book is combined into the energy with the terminal Code book corresponding to power grade；The reporting unit is by the ability rating information of the network equipment transmission terminal, will select The pre-coding matrix set gone out is indicated to the network equipment.
13. terminal device as claimed in claim 12, it is characterised in that the selecting unit is specifically used for, and is surveyed according to channel Measure result and signal receives detection algorithm, the pre-coding matrix set used when selecting feedback from available code book；Or according to The ability of terminal processes code book, the pre-coding matrix set used when selecting feedback from available code book.
14. terminal device as claimed in claim 12, it is characterised in that the reporting unit is specifically used for, to the network equipment Configured information is sent, the number of bits that the configured information takes is the quantity of the pre-coding matrix in the compound code book, often Position bit is used to identify whether corresponding pre-coding matrix in the compound code book is the precoding square gone out selected by the terminal Member in battle array set；
Or subset division is carried out to the compound code book in advance, each subset obtained to division is numbered, wherein, each son The numbering of collection takesIndividual bit, M represent the quantity for the subset that division obtains,Expression rounds up；It is described to report Unit is specifically used for, by it is selected go out compound codebook subset corresponding to numbering be sent to the network equipment.
15. terminal device as claimed in claim 12, it is characterised in that the reporting unit is specifically used for, for selecting At least 2 sets of code books in often set code book, to the network equipment send code book mark and configured information, the finger The number of bits for showing information occupancy is the quantity of pre-coding matrix in code book, wherein every bit is corresponding in code book for identifying Whether pre-coding matrix is member in the pre-coding matrix set gone out selected by the terminal；
Or subset division is carried out to the often set code book in the codebook set in advance, each subset obtained to division is compiled Number, wherein, the numbering of each subset takesIndividual bit, the code book that M represents to carry out subset division divide obtained son The quantity of collection,Expression rounds up；The reporting unit is specifically used for, at least 2 sets of code books described in selecting Code book is often covered, to the numbering corresponding to the subset that the network equipment sends the mark of code book and is selected from the code book.
16. the terminal device as described in claim 12 to 15 any one, it is characterised in that the reporting unit is specifically used In reporting numbering of the pre-coding matrix of recommendation in affiliated code book to the network equipment；
Or the reporting unit is specifically used for, each pre-coding matrix in the pre-coding matrix set selected is compiled Number, the numbering of each pre-coding matrix takesIndividual bit, wherein, L is represented in the pre-coding matrix set that terminal is selected Pre-coding matrix quantity,Expression rounds up；The pre-coding matrix recommended is sent to the network equipment to prelist in selected Numbering in code set of matrices.
17. the terminal device as described in claim 12 to 15 any one, it is characterised in that also including receiving unit；
The receiving unit, the more sets currently supported for receiving the network equipment that the network equipment is sent by high-level signaling Each self-corresponding mark of code book；
The selecting unit is specifically used for, each self-corresponding mark of more set code books received according to the receiving unit, from right The pre-coding matrix set used when selecting feedback in the more set code books answered.
A kind of 18. network equipment, it is characterised in that including：
First receiving unit, the configured information sent for receiving terminal, the configured information are used to indicate the terminal feedback When the pre-coding matrix set that uses；Wherein, the pre-coding matrix set is the terminal according to transmission characteristic or terminal energy What power chose from available code book；
Second receiving unit, the pre-coding matrix mark and data flow recommended for receiving the terminal that the terminal reports Quantity and channel quality information；Wherein, the pre-coding matrix recommended is the terminal from precoding that is selected and indicating Chosen in set of matrices, the number of data streams reported is the terminal according to precoding square that is selected and indicating Battle array set determines that the channel quality information reported is that the terminal is determined according to the pre-coding matrix recommended 's；
Processing unit, for the number of data streams and channel quality information and the precoding square of recommendation reported according to the terminal Battle array mark is transmitted processing；
Wherein, the pre-coding matrix set is that the terminal chooses according to transmission characteristic from available code book, including：
Described with code book is a set of compound code book, and the configured information that first receiving unit receives indicates the terminal The subset selected from compound code book；Or the codebook set formed with code book for more set code books, described first connects Receive the configured information that unit receives and indicate the code book that the terminal is selected from codebook set；Or it is described can The codebook set formed with code book for more set code books, the configured information that first receiving unit receives indicate the terminal At least 2 sets of code books and its subset selected from codebook set；
Wherein, the pre-coding matrix set is that the terminal chooses according to terminal capability from available code book, including：
Described with code book is a set of compound code book, be provided with the terminal and the network equipment terminal capability grade with it is multiple The corresponding relation of codebook subset is closed, the corresponding relation shows the pre-coding matrix set that the terminal of each ability rating is supported； The configured information is the ability rating of the terminal；Or the codebook set formed with code book for more set code books, institute State and terminal capability grade and the corresponding relation of the code book in the codebook set are provided with terminal and the network equipment, it is described Corresponding relation shows the code book that the terminal of each ability rating is supported；The configured information is the ability rating of the terminal.
19. the network equipment as claimed in claim 18, it is characterised in that the situation that code book is a set of compound code book Under, the number of bits that the configured information takes is the quantity of the pre-coding matrix in the compound code book, and every bit is used for Identify whether corresponding pre-coding matrix in the compound code book is in the pre-coding matrix set gone out selected by the terminal Member；
Or subset division is carried out to the compound code book in advance, each subset obtained to division is numbered, wherein, each son The numbering of collection takesIndividual bit, M represent the quantity for the subset that division obtains,Expression rounds up；The instruction Information is the numbering corresponding to the compound codebook subset gone out selected by the terminal.
20. the network equipment as claimed in claim 18, it is characterised in that the code book formed with code book for more set code books In the case of set, the mark for often covering code book at least 2 sets of code books that the configured information includes going out selected by the terminal And the subset configured information of code book is often covered, the number of bits that the subset configured information takes is pre-coding matrix in code book Quantity, wherein every bit is used to identify whether corresponding pre-coding matrix in code book is the precoding gone out selected by the terminal Member in set of matrices；
Or subset division is carried out to the often set code book in the codebook set in advance, each subset obtained to division is compiled Number, wherein, the numbering of each subset takesIndividual bit, the code book that M represents to carry out subset division divide obtained son The quantity of collection,Expression rounds up；The configured information is the often set at least 2 sets of code books gone out selected by the terminal The mark of code book and the often numbering of the subset of set code book.
21. the network equipment as described in claim 18 to 20 any one, it is characterised in that the pre-coding matrix mark of recommendation For numbering of the pre-coding matrix in affiliated code book of recommendation；
Or the pre-coding matrix of recommendation is identified as the pre-coding matrix of recommendation selected by the terminal and what is indicated prelists Numbering in code set of matrices；Wherein, each pre-coding matrix in the pre-coding matrix set that the terminal-pair is selected is carried out Numbering, the numbering of each pre-coding matrix takeIndividual bit, wherein, L represents the pre-coding matrix set that terminal is selected In pre-coding matrix quantity,Expression rounds up.
22. the network equipment as described in claim 18 to 20 any one, it is characterised in that also include：
Transmitting element, for sending more set code books that the network equipment currently supports each to the terminal by high-level signaling Corresponding mark, for indicating the terminal according to each self-corresponding mark of more set code books received, from corresponding more set codes The pre-coding matrix set used when selecting feedback in this.
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