CN106788875A - A kind of channel state information feedback method and device - Google Patents
A kind of channel state information feedback method and device Download PDFInfo
- Publication number
- CN106788875A CN106788875A CN201510796724.6A CN201510796724A CN106788875A CN 106788875 A CN106788875 A CN 106788875A CN 201510796724 A CN201510796724 A CN 201510796724A CN 106788875 A CN106788875 A CN 106788875A
- Authority
- CN
- China
- Prior art keywords
- coding matrix
- plies
- equal
- agreement
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
-
- 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
- H04B7/0486—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking channel rank into account
-
- 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
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
-
- 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
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of channel state information feedback method and device.The present invention includes：Terminal is according to descending channel information and the pre-coding matrix of agreement, determine RI and/or CQI, and the RI and/or CQI determined to base station feedback, it is achieved thereby that the pre-coding matrix that terminal is based on agreement is calculated and feeds back RI and/or CQI, base station is set accurately to be transmitted number of plies self adaptation and link circuit self-adapting.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of channel state information feedback method and device.
Background technology
In TDD (Time Division Duplexing, time division duplex) system, base station can be based on upper
Row channel information utilizes according to channel reciprocity to obtain descending channel information, so as to be based on descending channel information
Calculate the descending transmission number of plies (rank), pre-coding matrix, line link self adaptation of going forward side by side.Now, terminal
Only need to feedback CQI (Channel Quality Indicator, abbreviation channel quality is indicated).
But, because base station cannot obtain descending interference information, and channel up-downgoing reciprocity is not reason
Think, therefore the transmission number of plies that base station is estimated is in some cases inaccurate.In this case, can be with
It is required that terminal is calculated on the basis of CQI and feeds back RI, so that the RI that base station can be based on feedback is passed
Defeated number of plies self adaptation.
CSI (Channel State Information, the channel condition information) feedbacks of terminal are generally basede on
CSI-RS (Channel State Information Reference Signal, channel state information reference signals)
The measurement of signal is obtained.FD-MIMO (Full Dimension Multi-Input-Multi-Output, entirely
Dimension multiple-input, multiple-output) in system, CSI-RS is usually by figuration (beamforming).Receive base station
To after the CSI (including RI and/or CQI) of terminal feedback, can be according to the figuration of CSI-RS vector
And the CSI of terminal feedback carries out descending scheduling and data transfer.
At present, the CQI of terminal feedback is that terminal is assumed to obtain based on the transmission for sending diversity, and sends and divide
Collection hypothesis can only support rank=1 (transmit the number of plies and be equal to 1) transmission, it is impossible to for calculating RI.Thus may be used
See, need a kind of new information feedback scheme badly, such that it is able to not assumed to prop up by diversity is sent
Hold the limitation of rank=1.
The content of the invention
A kind of channel state information feedback method and device are the embodiment of the invention provides, is used to realize according to about
Fixed pre-coding matrix carries out calculating and the feedback of CSI, from without being assumed to carry out CSI by based on transmission diversity
The limitation of rank=1 can only be supported during feedback.
Channel state information feedback method provided in an embodiment of the present invention, including：
Terminal determines RI and/or CQI according to descending channel information and the pre-coding matrix of agreement；
The terminal is to the RI and/or CQI determined described in base station feedback.
Preferably, the pre-coding matrix of the agreement, is according to the down-bound pilot frequency signal for CSI measurements
What the transmission number of plies of port number and/or candidate determined.
Wherein, the terminal determines RI and CQI according to descending channel information and the pre-coding matrix of agreement,
Including：
The terminal according to be currently used in CSI measurement down-bound pilot frequency signal port number, and candidate biography
The defeated number of plies, determines the corresponding pre-coding matrix of the transmission number of plies of each candidate；
The terminal determines to transmit the number of plies based on descending channel information from the transmission number of plies of candidate, obtains RI
And the corresponding CQI of the transmission number of plies.
Preferably, in a pre-coding matrix for the agreement, the mould of each element is identical.
Preferably, in a pre-coding matrix for the agreement, the mould of each element be equal to 1 or
N is the number of all elements in the pre-coding matrix or the columns of the pre-coding matrix.
Preferably, in a pre-coding matrix for the agreement, the value of all elements is equal to 1, -1,Or
Preferably, the port number for the down-bound pilot frequency signal of CSI measurements is equal to 2, then the agreement is pre-
Encoder matrix includes：
The transmission number of plies is equal to 1, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 2, and corresponding pre-coding matrix is：
Or, the port number for the down-bound pilot frequency signal of CSI measurements is equal to 4, then the agreement prelists
Code matrix includes：
The transmission number of plies is equal to 1, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 2, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 3, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 4, and corresponding pre-coding matrix is：
Terminal provided in an embodiment of the present invention, including：
Determining module, for the pre-coding matrix according to descending channel information and agreement, determine RI and/or
CQI；
Feedback module, for the RI and/or CQI determined described in base station feedback.
Preferably, the pre-coding matrix of the agreement, is according to the down-bound pilot frequency signal for CSI measurements
What the transmission number of plies of port number and/or candidate determined.
Wherein, the determining module specifically for：
According to be currently used in CSI measurement down-bound pilot frequency signal port number, and candidate the transmission number of plies,
Determine the corresponding pre-coding matrix of the transmission number of plies of each candidate；
The transmission number of plies is determined from the transmission number of plies of candidate based on descending channel information, RI and the biography is obtained
The corresponding CQI of the defeated number of plies.
Preferably, in a pre-coding matrix for the agreement, the mould of each element is identical.
Preferably, in a pre-coding matrix for the agreement, the mould of each element be equal to 1 or
N is the number of all elements in the pre-coding matrix or the columns of the pre-coding matrix.
Preferably, in a pre-coding matrix for the agreement, the value of all elements is equal to 1, -1,Or
Preferably, the port number for the down-bound pilot frequency signal of CSI measurements is equal to 2, then the agreement is pre-
Encoder matrix includes：
The transmission number of plies is equal to 1, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 2, and corresponding pre-coding matrix is：
Or, the port number for the down-bound pilot frequency signal of CSI measurements is equal to 4, then the agreement prelists
Code matrix includes：
The transmission number of plies is equal to 1, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 2, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 3, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 4, and corresponding pre-coding matrix is：
In the above embodiment of the present invention, can make an appointment pre-coding matrix, and so, terminal can be according under
The pre-coding matrix of row channel information and above-mentioned agreement, determines RI and/or CQI and is fed back, so that real
Pre-coding matrix of the terminal based on agreement is showed to calculate and feed back RI and/or CQI, base station is carried out accurately
Transmission number of plies self adaptation and link circuit self-adapting, and with the prior art based on send diversity assume carry out
CSI feedback is compared, and can not be limited by rank=1.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, institute in being described to embodiment below
The accompanying drawing for needing to use is briefly introduced, it should be apparent that, drawings in the following description are only of the invention
Some embodiments, for one of ordinary skill in the art, are not paying the premise of creative labor
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is CSI feedback schematic flow sheet provided in an embodiment of the present invention；
Fig. 2 is one of structural representation of terminal provided in an embodiment of the present invention；
Fig. 3 is the two of the structural representation of terminal provided in an embodiment of the present invention.
Specific embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing to this hair
It is bright to be described in further detail, it is clear that described embodiment is only some embodiments of the invention,
Rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out all other embodiment obtained under the premise of creative work, belong to the scope of protection of the invention.
Be CSI feedback schematic flow sheet provided in an embodiment of the present invention referring to Fig. 1, the flow may include as
Lower step：
Step 101：Terminal according to descending channel information and the pre-coding matrix of agreement, determine RI and/or
CQI。
Wherein, the descending channel information be terminal be based on for CSI measurement down-bound pilot frequency signal (such as
CSI-RS) carry out what channel estimation was obtained.Each port of down-bound pilot frequency signal can correspond to multiple transport layers
Data, the mean power that thereby may be ensured that each port is in a balanced way.
Step 102：Terminal is to the RI and/or CQI determined in base station feedback step 101.Specifically,
RI that terminal will be determined in step 101 and/or CQI are as channel condition information to base station feedback.Enter one
Step ground, after base station receives the RI and/or CQI of terminal feedback, can be according to the figuration vector sum of CSI-RS
The RI and/or CQI for obtaining carry out descending scheduling and data transfer.
Wherein, the pre-coding matrix of the agreement, can be pre-configured in end side.The precoding of the agreement
Matrix can determine according in the following manner：
Mode 1：Port number according to the down-bound pilot frequency signal measured for CSI determines.
As an example, in mode 1, can be according to the port of the down-bound pilot frequency signal measured for CSI
Several every kind of possible situations, determines the pre-coding matrix calculated for RI and CQI under each case respectively.
Such as, the port number for the down-bound pilot frequency signal measured for CSI is equal to 2 situation, determines this kind of feelings
The pre-coding matrix calculated for RI and CQI under condition；For the down-bound pilot frequency signal measured for CSI
The port number situation that is equal to 4, determine the pre-coding matrix calculated for RI and CQI in the case of this kind,
By that analogy.
Correspondingly, terminal is determining RI and CQI according to the pre-coding matrix of descending channel information and agreement
When, can (port number can be by base station according to the port number of down-bound pilot frequency signal for being currently used in CSI measurements
Notify to terminal), it is determined that the pre-coding matrix of agreement correspondingly, and calculated according to the pre-coding matrix
RI and CQI.
Mode 2：The transmission number of plies according to candidate determines.
As an example, in mode 2, can be according to every kind of possibility of the transmission number of plies (rank) of candidate
Situation, determines the pre-coding matrix calculated for RI and CQI under each case respectively.Such as, for
The situation of rank=1, determines the pre-coding matrix calculated for RI and CQI in the case of this kind；For
The situation of rank=2, determines the pre-coding matrix calculated for RI and CQI in the case of this kind, with such
Push away.
Correspondingly, terminal is determining RI and CQI according to the pre-coding matrix of descending channel information and agreement
When, a transmission number of plies can be selected from the candidate transport number of plies (rank) based on descending channel information, really
The pre-coding matrix of fixed agreement correspondingly, and RI and CQI is calculated according to the pre-coding matrix.Wherein,
Terminal can be based on channel capacity optiaml ciriterion or other criterions, and a transmission is selected from the candidate transport number of plies
The number of plies.As a example by using channel capacity optiaml ciriterion, terminal can be according to descending channel information and candidate
The corresponding pre-coding matrixes of rank, determine that all candidate rank distinguish corresponding down channel capacity, according to institute
There is candidate rank to distinguish corresponding down channel capacity, determine maximum channel capacity corresponding rank, the rank
Value be value for the RI for feeding back, pre-coding matrix of the terminal according to corresponding to the rank is calculated
Obtain CQI.
As can be seen that a transmission number of plies is selected from the candidate transport number of plies based on channel capacity optiaml ciriterion,
And then RI and CQI is determined based on the transmission number of plies, RI and CQI and the terminal determined can be caused
Actual channel conditions match, i.e. make RI that terminal is calculated and reported and CQI more accurate, Jin Erji
Standing can carry out accurate Rank self adaptations and link circuit self-adapting.Certainly can also be from using similar criterion
A transport layer is selected in candidate transport layer, so as to reach the effect above, be will not enumerate herein.
Mode 3：The transmission number of plies of port number and candidate according to the down-bound pilot frequency signal measured for CSI
It is determined that.
As an example, in mode 3, can be according to the port of the down-bound pilot frequency signal measured for CSI
Several every kind of possible situations and the every kind of possible situation of the transmission number of plies (rank) of candidate, determine not respectively
With the pre-coding matrix calculated for RI and CQI under combined situation.Such as, for port number=2 and
The situation of rank=1, determines the pre-coding matrix calculated for RI and CQI under this kind of combined situation；Pin
To port number=2 and the situation of rank=2, being calculated for RI and CQI under this kind of combined situation is determined
Pre-coding matrix；For port number=4 and the situation of rank=2, determine under this kind of combined situation for RI
The pre-coding matrix calculated with CQI；For port number=4 and the situation of rank=4, determine that this kind combines feelings
The pre-coding matrix calculated for RI and CQI under condition, by that analogy.
Correspondingly, terminal is determining RI and CQI according to the pre-coding matrix of descending channel information and agreement
When, can (port number can be by base station according to the port number of down-bound pilot frequency signal for being currently used in CSI measurements
Notify), and candidate the transmission number of plies, determine each corresponding pre-coding matrix of the candidate transport number of plies, and
Select from the transmission number of plies of candidate to transmit the number of plies based on descending channel information, so as to obtain RI (RI's
Value is equal to the value of the transmission number of plies) and the corresponding CQI of the transmission number of plies.Wherein, terminal can be with base
In channel capacity optiaml ciriterion or other criterions, a transmission number of plies is selected from the candidate transport number of plies.To adopt
As a example by with channel capacity optiaml ciriterion, and be currently used in CSI measurement down-bound pilot frequency signal port number=2,
Then terminal can according to descending channel information and port number=2 in the case of all candidate rank it is corresponding
Pre-coding matrix, determines that these all candidate rank distinguish corresponding down channel capacity, all according to these
Candidate rank distinguishes corresponding down channel capacity, determines maximum channel capacity corresponding rank, the rank
Value be value for the RI for feeding back, pre-coding matrix of the terminal according to corresponding to the rank is calculated
Obtain CQI.
In some embodiments of the invention, the pre-coding matrix of agreement has constant modulus property, i.e. at one
In the pre-coding matrix of agreement, the mould of each element is identical.When constructing or designing the pre-coding matrix of agreement,
Its design principle can with current LTE (Long Term Evolution, Long Term Evolution) system in prelist
The design principle of code set of matrices (i.e. code book) is consistent, and the pre-coding matrix arranged in the embodiment of the present invention can
To come from the code book in LTE system.
For example, in certain embodiments, in a pre-coding matrix for agreement, the mould of each element
Equal to 1 orN is the number of all elements in the pre-coding matrix or the columns of the pre-coding matrix.
Again for example, in a pre-coding matrix for agreement, the value of all elements is equal to 1, -1,Or
Again for example, the port number for the down-bound pilot frequency signal of CSI measurements is equal to 2, then that arranges is pre-
Encoder matrix can be as shown in table 1：
Table 1
Again for example, the port number for the down-bound pilot frequency signal of CSI measurements is equal to 4, then that arranges is pre-
Encoder matrix can be as shown in table 2：
Table 2
By table 1 or table 2 as can be seen that for corresponding to a possible port number and possible rank
Pre-coding matrix, the matrix column number is equal to the value of the rank, the line number of the matrix and is equal to the port number.
Preferably, in order to ensure power normalization, the pre-coding matrix of agreement can be based on given above pre-
Encoder matrix is multiplied by the corresponding real number factor and obtains.Such as can by above Matrix Multiplication withWherein M is
The element number of each column in matrix, the as port number of down-bound pilot frequency signal.
When the such scheme of the embodiment of the present invention is applied in FD-MIMO systems, it is contemplated that CSI-RS
Usually by figuration, i.e., each CSI-RS port that terminal is received can be by figuration DUAL PROBLEMS OF VECTOR MAPPING
Onto multiple antennas.So, base station only need to using a small amount of CSI-RS ports can just make terminal according to
Such scheme carries out the estimation of RI and CQI, obtains the channel information for needing.
By above description as can be seen that the pre-coding matrix that can make an appointment, so, terminal can be according under
The pre-coding matrix of row channel information and above-mentioned agreement, determines RI and CQI and is fed back, so that real
Pre-coding matrix of the terminal based on agreement is showed to calculate and feed back RI and CQI, base station is carried out accurately
Transmission number of plies self adaptation and link circuit self-adapting, and with the prior art based on send diversity assume carry out
CQI is compared with RI feedbacks, can not be limited by rank=1.
Based on identical technology design, the embodiment of the present invention additionally provides a kind of terminal, and the terminal can be realized
Above-mentioned CSI feedback flow.
It is the structural representation of terminal provided in an embodiment of the present invention referring to Fig. 2.As illustrated, the terminal
Determining module 201, feedback module 202 are may include, wherein：
Determining module 201, for the pre-coding matrix according to descending channel information and agreement, determines RI
And/or CQI；
Feedback module 202, for the RI and/or CQI determined described in base station feedback.
Preferably, the pre-coding matrix of the agreement, is according to the down-bound pilot frequency signal for CSI measurements
What the transmission number of plies of port number and/or candidate determined.
Wherein it is determined that module 201 can be specifically for：According to the down-bound pilot frequency signal for being currently used in CSI measurements
Port number, and candidate the transmission number of plies, determine the corresponding pre-coding matrix of the transmission number of plies of each candidate；
The transmission number of plies is determined from the transmission number of plies of candidate based on descending channel information, RI and the transport layer is obtained
The corresponding CQI of number.
Preferably, in a pre-coding matrix for the agreement, the mould of each element is identical.
Preferably, in a pre-coding matrix for the agreement, the mould of each element be equal to 1 or
N is the number of all elements in the pre-coding matrix or the columns of the pre-coding matrix.
Preferably, in a pre-coding matrix for the agreement, the value of all elements is equal to 1, -1,Or
Preferably, the port number for the down-bound pilot frequency signal of CSI measurements is equal to 2, then the agreement is pre-
Encoder matrix includes：
The transmission number of plies is equal to 1, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 2, and corresponding pre-coding matrix is：
Or, the port number for the down-bound pilot frequency signal of CSI measurements is equal to 4, then the agreement prelists
Code matrix includes：
The transmission number of plies is equal to 1, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 2, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 3, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 4, and corresponding pre-coding matrix is：
In the above embodiment of the present invention, can make an appointment pre-coding matrix, and so, terminal can be according under
The pre-coding matrix of row channel information and above-mentioned agreement, determines RI and/or CQI and is fed back, so that real
Pre-coding matrix of the terminal based on agreement is showed to calculate and feed back RI and/or CQI, base station is carried out accurately
Transmission number of plies self adaptation and link circuit self-adapting, and with the prior art based on send diversity assume carry out
CSI feedback is compared, and can not be limited by rank=1.
Based on identical technology design, the embodiment of the present invention additionally provides a kind of terminal, and the terminal can be realized
Above-mentioned CSI feedback flow.
It is the structural representation of terminal provided in an embodiment of the present invention referring to Fig. 3.
The network equipment may include：Processor 301, memory 302, transceiver 303 and EBI.
Processor 301 is responsible for bus architecture and common treatment, and memory 302 can store processor
301 data used when operation is performed.Transceiver 303 is used to be received under the control of processor 301
With transmission data.
Bus architecture can include the bus and bridge of any number of interconnection, specifically be represented by processor 301
The various circuits of the memory that one or more processors and memory 302 are represented are linked together.Total coil holder
Structure can also link various other circuits of such as ancillary equipment, voltage-stablizer and management circuit or the like
Together, these are all it is known in the art, therefore, being no longer described further to it herein.Always
Line interface provides interface.Transceiver 303 can be multiple element, i.e., including transmitter and transceiver, there is provided
For the unit for being communicated with various other devices over a transmission medium.Processor 301 is responsible for bus architecture
With common treatment, memory 302 can store the data that are used when operation is performed of processor 301.
The CSI feedback flow that the embodiment of the present invention is disclosed, in can apply to processor 301, or by
Reason device 301 is realized.In implementation process, each step of CSI feedback flow can be by processor 301
Hardware integrated logic circuit or software form instruction complete.Processor 301 can be general procedure
Device, digital signal processor, application specific integrated circuit, field programmable gate array or other FPGAs
Device, discrete gate or transistor logic, discrete hardware components, it is possible to achieve or perform the present invention
Disclosed each method, step and logic diagram in embodiment.General processor can be microprocessor or
Any conventional processor etc..The step of method with reference to disclosed in the embodiment of the present invention, can be embodied directly in
Hardware processor performs completion, or performs completion with the hardware in processor and software module combination.Software
Module may be located at random access memory, flash memory, read-only storage, programmable read only memory or electrically erasable
In writing the ripe storage medium in this areas such as programmable storage, register.The storage medium is located at memory
302, processor 301 reads the information in memory 302, and CSI feedback flow is completed with reference to its hardware
Step.
Specifically, processor 301, for reading the program in memory 302, perform following process：
According to descending channel information and the pre-coding matrix of agreement, RI and/or CQI is determined；
To the RI and/or CQI that are determined described in base station feedback.
Preferably, the pre-coding matrix of the agreement, is according to the down-bound pilot frequency signal for CSI measurements
What the transmission number of plies of port number and/or candidate determined.
Wherein, processor 301 can be specifically for：According to the down-bound pilot frequency signal for being currently used in CSI measurements
Port number, and candidate the transmission number of plies, determine the corresponding pre-coding matrix of the transmission number of plies of each candidate；
The transmission number of plies is determined from the transmission number of plies of candidate based on descending channel information, RI and the transport layer is obtained
The corresponding CQI of number.
Preferably, in a pre-coding matrix for the agreement, the mould of each element is identical.Based on the original
Then, the example of a pre-coding matrix for the agreement can be found in the description of previous embodiment, no longer weigh herein
It is multiple.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method or computer journey
Sequence product.Therefore, the present invention can use complete hardware embodiment, complete software embodiment or combine software
With the form of the embodiment of hardware aspect.And, the present invention can be used and wherein include meter at one or more
Calculation machine usable program code computer-usable storage medium (including but not limited to magnetic disk storage,
CD-ROM, optical memory etc.) on implement computer program product form.
The present invention is produced with reference to method according to embodiments of the present invention, equipment (system) and computer program
The flow chart and/or block diagram of product is described.It should be understood that can by computer program instructions realize flow chart and
/ or block diagram in each flow and/or the flow in square frame and flow chart and/or block diagram and/
Or the combination of square frame.These computer program instructions to all-purpose computer, special-purpose computer, insertion can be provided
The processor of formula processor or other programmable data processing devices is producing a machine so that by calculating
The instruction of the computing device of machine or other programmable data processing devices is produced for realizing in flow chart one
The device of the function of being specified in individual flow or multiple one square frame of flow and/or block diagram or multiple square frames.
These computer program instructions may be alternatively stored in can guide computer or the treatment of other programmable datas to set
In the standby computer-readable memory for working in a specific way so that storage is in the computer-readable memory
Instruction produce comprising command device manufacture, the command device realize in one flow of flow chart or multiple
The function of being specified in one square frame of flow and/or block diagram or multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices, made
Obtain and series of operation steps is performed on computer or other programmable devices to produce computer implemented place
Reason, so as to the instruction performed on computer or other programmable devices is provided for realizing in flow chart one
The step of function of being specified in flow or multiple one square frame of flow and/or block diagram or multiple square frames.
, but those skilled in the art once know base although preferred embodiments of the present invention have been described
This creative concept, then can make other change and modification to these embodiments.So, appended right will
Ask and be intended to be construed to comprising preferred embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification without deviating from this hair to the present invention
Bright spirit and scope.So, if it is of the invention these modification and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprising these changes and modification.
Claims (14)
1. a kind of channel state information feedback method, it is characterised in that including：
Terminal determines order instruction RI and/or channel according to descending channel information and the pre-coding matrix of agreement
Quality indicator (CQI)；
The terminal is to the RI and/or CQI determined described in base station feedback.
2. the method for claim 1, it is characterised in that the pre-coding matrix of the agreement, be
According to the port number and/or the transport layer of candidate of the down-bound pilot frequency signal measured for channel condition information CSI
What number determined.
3. method as claimed in claim 2, it is characterised in that the terminal is according to descending channel information
And the pre-coding matrix of agreement, determine RI and CQI, including：
The terminal according to be currently used in CSI measurement down-bound pilot frequency signal port number, and candidate biography
The defeated number of plies, determines the corresponding pre-coding matrix of the transmission number of plies of each candidate；
The terminal determines to transmit the number of plies based on descending channel information from the transmission number of plies of candidate, obtains RI
And the corresponding CQI of the transmission number of plies.
4. method as claimed any one in claims 1 to 3, it is characterised in that one it is described about
In fixed pre-coding matrix, the mould of each element is identical.
5. method as claimed any one in claims 1 to 3, it is characterised in that one it is described about
In fixed pre-coding matrix, the mould of each element be equal to 1 orN is all units in the pre-coding matrix
The number of element or the columns of the pre-coding matrix.
6. method as claimed any one in claims 1 to 3, it is characterised in that one it is described about
In fixed pre-coding matrix, the value of all elements is equal to 1, -1,Or
7. method as claimed any one in claims 1 to 3, it is characterised in that for CSI measurements
Down-bound pilot frequency signal port number be equal to 2, then the pre-coding matrix of the agreement include：
The transmission number of plies is equal to 1, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 2, and corresponding pre-coding matrix is：
Or, the port number for the down-bound pilot frequency signal of CSI measurements is equal to 4, then the agreement prelists
Code matrix includes：
The transmission number of plies is equal to 1, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 2, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 3, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 4, and corresponding pre-coding matrix is：
8. a kind of terminal, it is characterised in that including：
Determining module, for the pre-coding matrix according to descending channel information and agreement, determines order instruction
RI and/or channel quality indicator (CQI)；
Feedback module, for the RI and/or CQI determined described in base station feedback.
9. terminal as claimed in claim 8, it is characterised in that the pre-coding matrix of the agreement, be
According to the port number and/or the transport layer of candidate of the down-bound pilot frequency signal measured for channel condition information CSI
What number determined.
10. terminal as claimed in claim 9, it is characterised in that the determining module specifically for：
According to be currently used in CSI measurement down-bound pilot frequency signal port number, and candidate the transmission number of plies,
Determine the corresponding pre-coding matrix of the transmission number of plies of each candidate；
The transmission number of plies is determined from the transmission number of plies of candidate based on descending channel information, RI and the biography is obtained
The corresponding CQI of the defeated number of plies.
11. terminal as any one of claim 8 to 10, it is characterised in that described in one
In the pre-coding matrix of agreement, the mould of each element is identical.
12. terminal as any one of claim 8 to 10, it is characterised in that described in one
In the pre-coding matrix of agreement, the mould of each element be equal to 1 orN is all in the pre-coding matrix
The columns of the number of element or the pre-coding matrix.
13. terminal as any one of claim 8 to 10, it is characterised in that described in one
In the pre-coding matrix of agreement, the value of all elements is equal to 1, -1,Or
14. terminal as any one of claim 8 to 10, it is characterised in that surveyed for CSI
The port number of the down-bound pilot frequency signal of amount is equal to 2, then the pre-coding matrix of the agreement includes：
The transmission number of plies is equal to 1, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 2, and corresponding pre-coding matrix is：
Or, the port number for the down-bound pilot frequency signal of CSI measurements is equal to 4, then the agreement prelists
Code matrix includes：
The transmission number of plies is equal to 1, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 2, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 3, and corresponding pre-coding matrix is：
The transmission number of plies is equal to 4, and corresponding pre-coding matrix is：
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510796724.6A CN106788875A (en) | 2015-11-18 | 2015-11-18 | A kind of channel state information feedback method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510796724.6A CN106788875A (en) | 2015-11-18 | 2015-11-18 | A kind of channel state information feedback method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106788875A true CN106788875A (en) | 2017-05-31 |
Family
ID=58916060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510796724.6A Pending CN106788875A (en) | 2015-11-18 | 2015-11-18 | A kind of channel state information feedback method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106788875A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019047185A1 (en) * | 2017-09-08 | 2019-03-14 | Oppo广东移动通信有限公司 | Wireless communication method, terminal device and transmitting node |
| CN111756422A (en) * | 2019-03-29 | 2020-10-09 | 华为技术有限公司 | Method for indicating channel state information and communication device |
| WO2024051821A1 (en) * | 2022-09-09 | 2024-03-14 | 华为技术有限公司 | Channel state information processing method and apparatus |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964700A (en) * | 2009-07-23 | 2011-02-02 | 华为技术有限公司 | Signal transmission processing method, signal transmission control method, signal transmission system, user equipment (UE) and base station |
| CN102255705A (en) * | 2011-07-08 | 2011-11-23 | 电信科学技术研究院 | Uplink precoding information indication method and device |
| CN102255643A (en) * | 2011-06-30 | 2011-11-23 | 电信科学技术研究院 | Uplink pre-coding matrix indicating and signal transmission method, system and equipment |
| CN102394678A (en) * | 2011-06-30 | 2012-03-28 | 电信科学技术研究院 | Open loop transmission pre-encoding processing and detecting method and device and open loop transmission system |
| CN102468947A (en) * | 2010-11-05 | 2012-05-23 | 大唐移动通信设备有限公司 | Feedback method and equipment for signal channel quality information |
| CN102792605A (en) * | 2010-03-08 | 2012-11-21 | Lg电子株式会社 | Method and user equipment for transmitting precoding matrix information, and method and base station for configuring precoding matrix |
| CN103873118A (en) * | 2014-03-26 | 2014-06-18 | 电信科学技术研究院 | Codebook selection method and device |
| CN104579586A (en) * | 2013-10-22 | 2015-04-29 | 电信科学技术研究院 | Method and device for feeding back channel state information and method and device for receiving channel state information |
-
2015
- 2015-11-18 CN CN201510796724.6A patent/CN106788875A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964700A (en) * | 2009-07-23 | 2011-02-02 | 华为技术有限公司 | Signal transmission processing method, signal transmission control method, signal transmission system, user equipment (UE) and base station |
| CN102792605A (en) * | 2010-03-08 | 2012-11-21 | Lg电子株式会社 | Method and user equipment for transmitting precoding matrix information, and method and base station for configuring precoding matrix |
| CN102468947A (en) * | 2010-11-05 | 2012-05-23 | 大唐移动通信设备有限公司 | Feedback method and equipment for signal channel quality information |
| CN102255643A (en) * | 2011-06-30 | 2011-11-23 | 电信科学技术研究院 | Uplink pre-coding matrix indicating and signal transmission method, system and equipment |
| CN102394678A (en) * | 2011-06-30 | 2012-03-28 | 电信科学技术研究院 | Open loop transmission pre-encoding processing and detecting method and device and open loop transmission system |
| CN102255705A (en) * | 2011-07-08 | 2011-11-23 | 电信科学技术研究院 | Uplink precoding information indication method and device |
| CN104579586A (en) * | 2013-10-22 | 2015-04-29 | 电信科学技术研究院 | Method and device for feeding back channel state information and method and device for receiving channel state information |
| CN103873118A (en) * | 2014-03-26 | 2014-06-18 | 电信科学技术研究院 | Codebook selection method and device |
Non-Patent Citations (1)
| Title |
|---|
| ETRI: "Discussion on CSI-RS enhancements for non-precoded CSI-RS", 《3GPP TSG RAN WG1 MEETING #82 R1-154396》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019047185A1 (en) * | 2017-09-08 | 2019-03-14 | Oppo广东移动通信有限公司 | Wireless communication method, terminal device and transmitting node |
| US11252592B2 (en) | 2017-09-08 | 2022-02-15 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Wireless communication method, terminal device and transmitting node |
| CN111756422A (en) * | 2019-03-29 | 2020-10-09 | 华为技术有限公司 | Method for indicating channel state information and communication device |
| WO2024051821A1 (en) * | 2022-09-09 | 2024-03-14 | 华为技术有限公司 | Channel state information processing method and apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10181890B2 (en) | Channel state information acquisition method, channel state information feedback method and devices thereof | |
| WO2019161546A1 (en) | Reciprocity based csi reporting configuration | |
| CN105991171B (en) | A kind of three dimensional channel status information determines method and device | |
| JP6732931B2 (en) | Data transmission method and device | |
| WO2015109463A1 (en) | Method and apparatus for channel measurement and feedback | |
| CN107925463A (en) | Method and apparatus for the reference signal for operating beam forming in a communications system | |
| TWI622276B (en) | Channel state information acquisition method, channel state information feedback method and device | |
| CN105871515B (en) | A kind of channel state information feedback method, downlink reference signal method and device | |
| CN111342913B (en) | Channel measurement method and communication device | |
| CN103905345B (en) | channel correcting device, method and system | |
| EP3252967B1 (en) | Processing method and device for sending and receiving pilot signal | |
| JP6723369B2 (en) | Feedback information transmission method and apparatus | |
| CN106712895A (en) | Method for feeding CSI and method and device for transmitting downlink data | |
| CN106788875A (en) | A kind of channel state information feedback method and device | |
| CN107733494B (en) | Precoding method, and channel state information determining method and device | |
| WO2016124078A1 (en) | Channel measurement method and device | |
| CN105871435B (en) | Channel state information feedback method, device and user equipment | |
| CN108270472A (en) | Method, base station and the terminal of code book is configured | |
| CN111585627A (en) | Method and device in wireless communication | |
| CN106961401A (en) | A kind of channel estimation methods and device | |
| CN115037343B (en) | Information mapping method, information acquisition method and related equipment | |
| CN114762265A (en) | Mapping windowed FD bases to combined indications for PMI reporting and usage | |
| CN111130582B (en) | Method for calculating emission weight in coherent joint emission JT and corresponding device | |
| WO2022083412A1 (en) | Csi-rs enhanced transmission method and apparatus | |
| US20110135024A1 (en) | Precoding matrix design method for multiple base station using mimo technique |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Applicant after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Applicant before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
|
| CB02 | Change of applicant information | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210601 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Applicant after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Applicant before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
|
| TA01 | Transfer of patent application right | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |
|
| RJ01 | Rejection of invention patent application after publication |