CN108574521A - Method and apparatus for MIMO communications - Google Patents
Method and apparatus for MIMO communications Download PDFInfo
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- CN108574521A CN108574521A CN201710141907.3A CN201710141907A CN108574521A CN 108574521 A CN108574521 A CN 108574521A CN 201710141907 A CN201710141907 A CN 201710141907A CN 108574521 A CN108574521 A CN 108574521A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback systems
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Abstract
Embodiment of the disclosure provides the method and apparatus fed back for carrying out channel state information (CSI) in MIMO communications.Method described here includes the first instruction from the expectation quality of the CSI between network equipment receiving terminal apparatus and the network equipment.CSI includes the second instruction of multiple wave beam base vectors and parameter associated with multiple combinations of wave beam base vector.This method further includes at least the first instruction based on expectation quality to update the second instruction and parameter.This method further includes sending updated second instruction and updated parameter to the network equipment.
Description
Technical field
Embodiment of the disclosure relates generally to the communications field, and in particular it relates to one kind for how defeated in multi input
Go out in (MIMO) communication and carries out the method and apparatus that channel state information (CSI) is fed back.
Background technology
MIMO technology can utilize spatial domain multiple data flows of simultaneous transmission in identical time/frequency source block, to effectively carry
Rise throughput of system.For the mimo system using frequency division duplex (FDD), the CSI at the network equipment passes through terminal device
Feedback obtain.Third generation cooperative partner program (3GPP) will support there is two with regard to the 5th generation (5G) wireless communication system
The CSI feedback of the spatial information feedback of type is reached an agreement, i.e., coarse with normal spatial resolution
(implicit) CSI feedback and accurate (explicit) CSI feedback with more high spatial resolution.It is anti-in coarse CSI
In feedback scheme, the information that terminal device is reported is coarse and is generally received since its feedback overhead is relatively low.However,
It is no longer applicable under certain scenes of the coarse CSI feedback scheme in 5G systems, because being needed under these scenes more accurate
Channel information.
5G systems are expected the data rate for supporting the explosive increase for great amount of terminals user.Therefore, in order to support
Multiple users, it is vital to obtain accurate CSI at the network equipment.Ideally, for accurate CSI feedback and
Speech, terminal device are needed to the direct reporting channel vector of the network equipment or feature vector.But this scheme is not in practice
It is feasible, because it needs sizable feedback overhead.
Invention content
Currently, there is an urgent need to develop a kind of new feedback schemes that can reduce feedback overhead.Generally, the implementation of the disclosure
Example proposes a kind of method and apparatus carrying out CSI feedback in the mimo communication.
In a first aspect, embodiment of the disclosure provides a kind of method implemented at terminal device.This method include from
First instruction of the expectation quality of the CSI between network equipment receiving terminal apparatus and the network equipment.CSI includes multiple wave beam bases
Second instruction of vector and parameter associated with multiple combinations of wave beam base vector.This method further includes at least being based on it is expected
The first of precision indicates to update the second instruction and parameter.This method further includes sending updated second instruction to the network equipment
And updated parameter.
In some embodiments, this method further comprises：Determine the first number of updated parameter；To the network equipment
Send the first number；And the second number of parameter is received from the network equipment.
In some embodiments, this method further comprises being different from the first number in response to the second number, is at least based on
Second number updates the second instruction and parameter.
In some embodiments, at least include to update the second instruction and parameter based on the second number：Iteration executes following
It operates at least once, until the number of iteration reaches the second number：Candidate beam is selected from the set of candidate beam base vector
Base vector；Candidate beam base vector based on selection updates the second instruction；And the candidate beam base vector based on selection with
And the estimation of the channel conditions between terminal device and the network equipment, undated parameter.
In some embodiments, it sends updated second instruction to the network equipment and updated parameter includes：It rings
Should be identical as the first number in the second number, send updated second instruction and updated parameter to the network equipment.
In some embodiments, include from the first instruction of network equipment reception expectation quality：From the network equipment via height
Layer signaling or physical layer signaling indicate to receive the first of expectation quality.
In some embodiments, include from the first instruction of network equipment reception expectation quality：From network equipment periodicity
Ground or the first instruction for aperiodically receiving expectation quality.
In some embodiments, it sends updated second instruction to the network equipment and updated parameter includes：
Updated second instruction is sent in following one：The communication bandwidth of wireless communication system, the single sub-band of communication bandwidth, with
And multiple sub-bands of communication bandwidth；And updated parameter is sent on single sub-band.
In second aspect, embodiment of the disclosure provides a kind of method implemented at the network equipment.This method include to
Terminal device sends the first instruction of the expectation quality of the channel state information (CSI) between terminal device and the network equipment.CSI
The second instruction including multiple wave beam base vectors and parameter associated with multiple combinations of wave beam base vector.This method is also wrapped
It includes from terminal device and receives the second instruction and the parameter being updated that at least the first instruction based on expectation quality is updated.
In some embodiments, this method further comprises：The first number of parameter is received from terminal device；Based on to end
The quantity of the radio resource of end equipment distribution, determines the second number of parameter；And send the second number to terminal device.
In some embodiments, the second number is different from the first number；And wherein the second instruction is received from terminal device
And parameter includes：The second instruction being at least updated based on the second number and the parameter being updated are received from terminal device.
In some embodiments, the second number is identical as the first number.
In some embodiments, this method further comprises：It is distributed based at least one of following to determine to terminal device
Radio resource quantity：The situation of channel between terminal device and the network equipment, the business need of terminal device, and
The quantity of the available radio resource of the network equipment.
In some embodiments, include to the first instruction of terminal device transmission expectation quality：Via high-level signaling or
Physical layer signaling sends the first instruction of expectation quality to terminal device.
In some embodiments, include to the first instruction of terminal device transmission expectation quality：Periodically or non-week
The first instruction of expectation quality is sent to phase property to terminal device.
In some embodiments, it receives the second instruction from terminal device and parameter includes：Is received in following one
Two instructions：The communication bandwidth of wireless communication system, the single sub-band of communication bandwidth and multiple sub-bands of communication bandwidth；
And receive parameter on single sub-band.
In the third aspect, embodiment of the disclosure provides a kind of terminal device.The terminal device includes controller and coupling
It is bonded to the memory of controller.Memory includes instruction.Instruction makes terminal device when being executed by controller：It is connect from the network equipment
The first instruction of the expectation quality of the CSI between terminal device and the network equipment is received, CSI includes the second of multiple wave beam base vectors
Instruction and parameter associated with multiple combinations of wave beam base vector；At least the first instruction based on expectation quality updates the
Two instructions and parameter；And send updated second instruction and updated parameter to the network equipment.
In fourth aspect, embodiment of the disclosure provides a kind of network equipment.The network equipment includes controller and coupling
It is bonded to the memory of controller.Memory includes instruction.Instruction makes the network equipment when being executed by controller：It is sent out to terminal device
First instruction of the expectation quality of the CSI to make arrangements for his funeral between end equipment and the network equipment, CSI includes the second of multiple wave beam base vectors
Instruction and parameter associated with multiple combinations of wave beam base vector；And it is received from terminal device and is at least based on expectation quality
The second instruction for being updated of the first instruction and the parameter that is updated.
It should be appreciated that the content described in Summary is not intended to limit the key or again of the embodiment of the present disclosure
Feature is wanted, it is also non-for limiting the scope of the present disclosure.The other feature of the disclosure will be easy to understand by description below.
Description of the drawings
It refers to the following detailed description in conjunction with the accompanying drawings, the above and other feature, advantage and aspect of each embodiment of the disclosure
It will be apparent.In the accompanying drawings, same or analogous reference numeral indicates same or analogous element, wherein：
Fig. 1 shows the example communication network that some embodiments of the disclosure can be implemented within；
Fig. 2 shows the flow charts according to the methods for CSI feedback of some embodiments of the disclosure；
Fig. 3 shows the flow chart of the method for CSI feedback of some embodiments according to the disclosure；
Fig. 4 shows the block diagram for the device of some embodiments according to the disclosure implemented at terminal device；
Fig. 5 shows the block diagram for the device of some embodiments according to the disclosure implemented at the network equipment；
Fig. 6 shows the block diagram of the communication equipment for some embodiments for being adapted to realize the disclosure；And
Fig. 7 and Fig. 8 shows the schematic diagram compared with the simulation performance of conventional method according to disclosed method.
It should be appreciated that the content described in Summary is not intended to limit the key or again of the embodiment of the present disclosure
Feature is wanted, it is also non-for limiting the scope of the present disclosure.The other feature of the disclosure will be easy to understand by description below.
Specific implementation mode
Embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the certain of the disclosure in attached drawing
Embodiment, it should be understood that, the disclosure can be realized by various forms, and should not be construed as being limited to this
In the embodiment that illustrates, it is in order to more thorough and be fully understood by the disclosure to provide these embodiments on the contrary.It should be understood that
It is that being given for example only property of the accompanying drawings and embodiments effect of the disclosure is not intended to limit the protection domain of the disclosure.
Term " network equipment " as used herein refers to other realities with specific function in base station or communication network
Body or node." base station " (BS) can indicate node B (NodeB either NB), evolution node B (eNodeB or eNB), long-range nothing
Line electric unit (RRU), radio-frequency maser (RH), remote radio heads (RRH), repeater or such as femto base station, femto base
The low power nodes etc. stood etc..In the context of the disclosure, for the purpose for discussing convenient, term " network equipment " and " base
Stand " it may be used interchangeably, and may be mainly using eNB as the example of the network equipment.
Term " terminal device " as used herein or " user equipment " (UE) be refer between base station or each other it
Between any terminal device for carrying out wireless communication.As an example, terminal device may include mobile terminal (MT), subscriber stations
(SS), portable subscriber platform (PSS), mobile station (MS) or access terminal (AT) and vehicle-mounted above equipment.In the disclosure
Context in, to discuss convenient purpose, term " terminal device " and " user equipment " may be used interchangeably.
Term " comprising " as used herein and its deformation are that opening includes, i.e., " include but not limited to ".Term "based"
It is " being based at least partially on ".Term " one embodiment " expression " at least one embodiment "；Term " another embodiment " indicates
" at least one other embodiment ".The related definition of other terms provides in will be described below.
Fig. 1 shows the example wireless communication system 100 that embodiment of the disclosure can be implemented within.Wireless communication system
System 100 includes the network equipment 110 and terminal device 120.
Communication between the network equipment 110 and terminal device 120 can be implemented according to any communication protocol appropriate, packet
It includes but is not limited to, the cellular communications such as the first generation (1G), the second generation (2G), the third generation (3G), forth generation (4G) and the 5th generation (5G)
It the wireless LAN communication agreement of agreement, Institute of Electrical and Electronics Engineers (IEEE) 802.11 etc., and/or is currently known
Or any other agreement developed in the future.Moreover, the arbitrary appropriate wireless communication technique of communication use, including but not limited to,
It is CDMA (CDMA), frequency division multiple access (FDMA), time division multiple acess (TDMA), frequency division duplex (FDD), time division duplex (TDD), how defeated
Enter multi output (MIMO), orthogonal frequency division multiple access (OFDM), and/or any other technology for being currently known or developing in the future.It answers
Considerable to be, although embodiment of the disclosure has mainly used long term evolution (LTE), system is described as example,
This is only exemplary, and the technical solution of the disclosure, which can be completely applied to other, suitable to be had or following exploitation is
System.
It should be appreciated that the network equipment shown in FIG. 1 number and terminal device number merely for the sake of explanation mesh
And have no intention to limit.Wireless communication system 100 may include any suitable type sum number purpose network equipment, and each network is set
It is standby that arbitrary an appropriate number of cell can be provided, and wireless communication system 100 can also include arbitrary an appropriate number of terminal
Equipment.
Channel between the network equipment 110 and terminal device 120 be intended in the spatial domain it is sparse, because of multiple spaces
Path is only reached from a limited number of angle (dispersion).Therefore, by the high dimensional feature of higher-dimension channel vector or channel matrix to
It is possible that amount, which is compressed into the low-dimensional vector comprising main-path information,.At present it has been proposed that the method based on linear combination (LC)
It is the effective means for the dimension for reducing channel vector.In the method based on linear combination, the network equipment 110 and terminal device
Channel between 120 can be represented as the line of the wave beam base vector (also referred to as " column vector ") from scheduled codebook matrix
Property combination.It is assumed that the network equipment 110 has NtA antenna and terminal device 120 have individual antenna,Indicate w
Channel vector at a subcarrier, then the linear combination of wave beam base vector can be expressed from the next：
WhereinIndicate that scheduled codebook matrix, c indicate linear combination coefficient vector, ciIndicate the in vector c
I linear combination coefficient,Indicate that i-th of column vector in codebook matrix B, N indicate the linear combination system in vector c
Several numbers, N and NtIt is the natural number more than 1.
In traditional CSI feedback scheme based on linear combination, reported and code in order to avoid being directed to each sub-band
The related information of this matrix B, terminal device are selected for the entire communication bandwidth of wireless communication system 100 from codebook matrix B
The wave beam base vector (that is, fixed subset of wave beam base vector) of fixed number, and then report selected wave to the network equipment 110
The instruction (for example, the index of wave beam base vector in codebook matrix) of beam base vector.In addition, in order to reduce feedback overhead, substitution
Report that all elements of linear combining coefficient vector c, terminal device ascertain the number and selected wave beam for each sub-band
The same number of linear combination coefficient (that is, linear combination coefficient of fixed number) of base vector, and then reported to the network equipment 110
Accuse linear combination coefficient.Terminal device can report information related with codebook matrix B for entire communication bandwidth as a result,
And the linear combination coefficient of fixed number is only reported for each sub-band.The reason is that, channel vector hwBecome in the spatial domain
To then sparse so that the linear combination coefficient vector when the linear combination of base vector of the application from scheduled codebook matrix
C is also sparse.
However, in traditional CSI feedback scheme based on linear combination, if for some terminal devices, needle
The fixed number of the base vector selected whole bandwidth is insufficient, then will be unable to ensure these terminal devices for each
The precision of the CSI of sub-band report.On the other hand, in the traditional scheme, if for other terminal devices, for
Whole bandwidth and the fixed number of base vector that selects is excessive, then will so that redundancy occurs in reported linear combination coefficient,
To waste feedback resources.
In order to solve the problems, such as at least partly above-mentioned and other potential defects in traditional scheme and, the reality of the disclosure
It applies example and proposes a kind of adaptive CSI feedback scheme to optimize the compromise between CSI precision and feedback overhead.In the disclosure
In embodiment, the network equipment sends the instruction of the expectation quality of CSI to terminal device, and terminal device is based on the instruction come from candidate
Base vector is selected in the set of base vector and determines corresponding linear combination coefficient.Thus, it is ensured that the essence of the CSI of feedback
Degree.In addition, in accordance with an embodiment of the present disclosure, for different terminal devices, the network equipment can indicate that the different of CSI it is expected essence
Degree.Different terminal devices can select and report different number of base vector and linear combination coefficient as a result, avoid selected
The number deficiency for the base vector selected or the situation of redundancy.Hereinafter, it will be described in detail referring to figs. 2 and 3 according to the disclosure
The method for CSI feedback.
Fig. 2 shows the flow charts of the method 200 according to an embodiment of the present disclosure for CSI feedback.Below in conjunction with Fig. 1
To describe action involved in method 200.In order to facilitate discussion, network as shown in Figure 1 will be combined to the description of method 200
Equipment 110 and terminal device 120 carry out.In fig. 2, for example, each action on right side is executed by the network equipment 110, and left side
Each action executed by terminal device 120.It should be appreciated that method 200 can also include unshowned additional move and/or can
To omit shown action, the scope of the present disclosure is not limited in this respect.
As shown in Fig. 2, in frame 201, the network equipment 110 sends terminal device 120 and the network equipment to terminal device 120
The instruction of the expectation quality of CSI between 110.CSI include multiple wave beam base vectors instruction and with multiple wave beam base vectors
The associated parameter of combination.For discussion purposes, hereinafter the instruction of the expectation quality of CSI is also referred to as " the first finger
Show ", and the instruction of multiple wave beam base vectors is also referred to as " the second instruction ".
The combination of multiple wave beam base vectors may include the combination of any appropriate form, for example, linear combination, non-linear group
Close etc..Hereinafter, for convenience discuss, by by taking the linear combination of multiple wave beam base vectors as an example to embodiment of the disclosure into
Row description.In the embodiment of the linear combination for being combined as multiple wave beam base vectors of multiple wave beam base vectors, " with multiple wave beams
The associated parameter of combination of base vector " can also be referred to as " linear combination coefficient ".
In some embodiments, the instruction of the expectation quality of CSI may indicate that multiple wave beam base vectors and linear combination system
Several linear combination and it is following in one between error predetermined threshold：Channel vector estimated by terminal device 120 or
Channel matrix, the feature vector of channel matrix, precoding vector.
In further embodiments, the instruction of the expectation quality of CSI may indicate that multiple wave beam base vectors and linear combination
Angle between the linear combination of coefficient and the channel vector estimated by terminal device 120.
In some embodiments, the instruction of multiple wave beam base vectors may include candidate beam base vector set in be chosen
The index for the wave beam base vector selected.The example of the set of candidate beam base vector may include but be not limited to discrete fourier
(DFT) code book.
In some embodiments, the network equipment 110 can determine the phase of CSI based on the channel conditions of terminal device 120
Hope precision.In addition, different business can be different for the required precision of CSI feedback.For example, enhancing compared to mobile broadband
(eMBB) business, high reliable communication (URLLC) can require more accurate CSI.In this regard, the network equipment 110 can be with base
The expectation quality of CSI is determined in the business demand of terminal device 120.
In some embodiments, the network equipment 110 can send the expectation of CSI via high-level signaling to terminal device 120
The instruction of precision.The example of high-level signaling may include but be not limited to radio resource control (RRC) signaling.Due to via
The information that high-level signaling is sent information when can be long, therefore the instruction for sending via high-level signaling the expectation quality of CSI can be with
Reduce signaling overheads.
In further embodiments, the network equipment 110 can send CSI's via physical layer signaling to terminal device 120
The instruction of expectation quality.For example, the network equipment 110 can be sent out on Physical Downlink Control Channel (PDCCH) to terminal device 120
Give the physical layer signaling.Due to physical layer signaling transmission relative to high-level signaling faster, can realize the quick biography of instruction
It is defeated.
In some embodiments, the network equipment 110 can periodically send the expectation quality of CSI to terminal device 120
Instruction.The network equipment 110 can determine the different periods for different terminal devices, to send the expectation quality of CSI
Instruction.
In further embodiments, the network equipment 110 can aperiodically send the expectation of CSI to terminal device 120
The instruction of precision.As an example, the network equipment 110 can be triggered from scheduled event and send CSI's to terminal device 120
The instruction of expectation quality.For example, the network equipment 110 can be in response to the channel between the network equipment 110 and terminal device 120
Situation sends the instruction of the expectation quality of CSI below predetermined threshold to terminal device 120.
Different sub-bands for communication bandwidth or in different times, between terminal device 120 and the network equipment 110
The situation of channel can be different.Therefore, in some embodiments, the network equipment 110 can be in the single son frequency of communication bandwidth
The instruction for sending the expectation quality of CSI on band or multiple sub-bands to terminal device 120, to realize the dynamical feedback of CSI.This
Outside, in order to reduce feedback overhead, in some embodiments, the network equipment 110 can be on entire communication bandwidth to terminal device
120 send the instruction of the expectation quality of CSI.
It continues to refer to figure 1.In frame 202, terminal device 120 receives the instruction of the expectation quality of CSI from the network equipment 110.
In frame 203, at least expectation quality based on CSI of terminal device 120 indicates to update instruction and the phase of multiple wave beam base vectors
Associated parameter.
In some embodiments, the instruction and associated parameter in combination for updating multiple wave beam base vectors can wrap
It includes and selects the candidate beam base vector of minimal number to obtain a suboptimum of the set from the set of candidate beam base vector
Subset, and associated parameter is determined based on the suboptimum subset.
In some embodiments, terminal device 120 can be using orthogonal matched jamming (OMP) algorithm come from candidate beam base
The candidate beam base vector of selection minimal number is to obtain the suboptimum subset in the set of vector.
Consider a specific example.In this example it is assumed that the collection of candidate beam base vector is combined into code book as described above
MatrixSo it can determine codebook matrix using OMP algorithmsSuboptimum submatrix BΓ, to utilize
Submatrix BΓTo approach channel vector h as much as possiblew, i.e.,：
hw≈BΓc (2)
Wherein BΓIndicate that the suboptimum submatrix of codebook matrix B, Γ indicate submatrix BΓIn wave beam base vector (column vector) rope
The gesture of the set and Γ drawn | Γ | ＜ Nt。
It is to determine codebook matrix using OMP algorithms belowSuboptimum submatrix BΓExample pseudo-code.
Input:ε (or K)；
Initialize:C [0]=0；R [0]=h；Γ '=0；
Repeat:
In kth time iteration:
Γ '=Γ ' ∪ { I }；
R [k]=h-BΓ′c[k]；
K=k+1
Until||r[k]||2≤ ε (or k=K)；
Return:C=c [k]；Γ=Γ '
It can see from above example pseudo-code, OMP algorithms can be iteratively performed, until the condition of convergence (that is, | | r [k]
||2≤ ε) it is satisfied.In each iteration, terminal device 120 selects one to make from codebook matrix BMaximum row
Vector, and record in set Γ the index I, wherein I ∈ [1, N of the column vectort], k is nonnegative integer.Subsequently, based on institute
The column vector of selection determines so that channel vector h and bI cBetween error minimum linear combination coefficient (that is, determine so thatMinimum x), and record the linear combination coefficient, wherein b using c [k]IIndicate submatrix BΓIn row to
Amount.Above-mentioned iterative process can continue, until the column vector in channel vector h and current collection Γ ' linear combination it
Between error in predetermined threshold ε hereinafter, i.e.：
||hw-BΓ′c||2≤ε (3)
Wherein BΓ' indicate the submatrix of codebook matrix B being made of the column vector in current collection Γ '.
It should be appreciated that the above pseudo-code is only an example.The realization of one or more of the other type can be used for utilizing
OMP algorithms determine the suboptimum submatrix B of codebook matrix BΓ。
It continues to refer to figure 1.In frame 204, terminal device 120 sends updated multiple wave beam basal orientations to the network equipment 110
The instruction of amount and updated parameter.For example, in above example pseudo-code, terminal device 120 can be sent out to the network equipment 110
Send the set Γ and linear combination coefficient c of the index of wave beam base vector.
In some embodiments, terminal device 120 can entire communication bandwidth, communication bandwidth single sub-band or
The instruction of multiple wave beam base vectors is sent on multiple sub-bands of person's communication bandwidth to the network equipment 110, and in communication bandwidth
On single sub-band parameter associated with multiple combinations of wave beam base vector is sent to the network equipment 110.
The instruction of multiple wave beam base vectors is sent on entire communication bandwidth in terminal device 120, and in communication bandwidth
It is sent in the embodiment of associated parameter on single sub-band, terminal device 120 for example can be based on following formula come needle
Parameter associated with multiple combinations of wave beam base vector is determined to each sub-band：
Wherein cwIndicate parameter for w-th sub-band, associated with multiple combinations of wave beam base vector (such as line
Property combination coefficient), BΓIndicate that the suboptimum submatrix of the codebook matrix B determined for entire communication bandwidth, Γ indicate the sub- square of suboptimum
Battle array BΓIn column vector index set.
In frame 205, the instruction that the network equipment 110 receives at least expectation quality based on CSI from terminal device 120 is updated
Multiple wave beam base vectors instruction and parameter.
In accordance with an embodiment of the present disclosure, for different terminal devices, the network equipment 110 can indicate the not same period of CSI
Hope precision.Different terminal devices can select and report different number of base vector and the combination phase with base vector as a result,
Associated parameter avoids the number deficiency of selected base vector or the situation of redundancy, to realize CSI precision and feedback
More preferably compromise between expense.
In order to reduce the search space of above-mentioned algorithm, and feedback overhead is more importantly reduced, in certain embodiments,
Only the submatrix of enough redundancies of codebook matrix B can be scanned for.In other words, the superfluous enough of codebook matrix B can be utilized
Input of the remaining submatrix as above-mentioned algorithm.For example, the submatrix of enough redundancies may include being directed toward terminal device 120
Wave beam base vector, the wave beam base vector without deviating from terminal device 120 including direction.The search space of above-mentioned algorithm is only as a result,
The half of whole column vectors including codebook matrix B.
In some embodiments, updated multiple wave beam base vectors are sent to the network equipment 110 in terminal device 120
Before instruction and updated parameter, terminal device 120 can determine the number of updated parameter and to the network equipment
110 send the number so that the network equipment 110 could be aware that should be distributed to terminal device 120 how many radio resource with
In CSI feedback.Fig. 3 shows the flow chart of the method 300 for CSI feedback according to such embodiment.Method 300 can be with
It is considered as a kind of specific implementation of method as described above 200.Method 200 can also be put in any other suitable
Practice.Action involved in method 300 is described below in conjunction with Fig. 1.In order to facilitate discussion, the description of method 300 will be tied
It closes the network equipment 110 as shown in Figure 1 and terminal device 120 carries out.In fig. 2, for example, each action on right side is set by network
Standby 110 execute, and each action in left side is executed by terminal device 120.It should be appreciated that method 300 can also include being not shown
Additional move and/or can be omitted shown action, the scope of the present disclosure is not limited in this respect.
As shown in figure 3, in frame 301, the network equipment 110 sends terminal device 120 and the network equipment to terminal device 120
The instruction of the expectation quality of CSI between 110.CSI include multiple wave beam base vectors instruction and with multiple wave beam base vectors
The associated parameter of combination.Correspondingly, in frame 302, terminal device 120 receives the expectation quality of CSI from the network equipment 110
Instruction.
In frame 303, at least expectation quality based on CSI of terminal device 120 indicates to update multiple wave beam base vectors
Instruction and parameter.
In some embodiments, the action at frame 301,302 and 303 can be with the frame 201,202 and 203 in method 200
The action at place is identical, thus omits its detailed description.
In frame 304, terminal device 120 determines the number for the parameter that the instruction of at least expectation quality based on CSI is updated
(being hereinafter also referred to as " the first number ").In frame 305, terminal device 120 to the network equipment 110 send parameter this first
Number.
Correspondingly, in frame 306, the network equipment 110 receives first number of parameter from terminal device 120.It is based on as a result,
First number, the network equipment 110, which could be aware that, how many radio resource is distributed to terminal device 120, for terminal device
The instruction for multiple wave beam base vectors that the instruction of the 120 feedback at least expectation qualities based on CSI is updated and parameter.
In some embodiments, the network equipment 110 can be distributed to determine to terminal device based at least one of following
The quantity of radio resource：The situation of channel between terminal device 120 and the network equipment 110；The business of terminal device 120 is wanted
It asks；And the quantity of 110 available radio resource of the network equipment.
In some embodiments, the quantity of the practical radio resource distributed to terminal device 120 of the network equipment 110 can be with
With terminal device 120 feed back updated multiple wave beam base vectors instruction and parameter needed for the quantity of radio resource it is identical
Or it is different.In other words, the number for the parameter that terminal device 120 can be fed back to the network equipment 110 is real dependent on the network equipment 110
The quantity for the radio resource that border is distributed to terminal device 120.Therefore, in frame 307, the network equipment 110 can be based on to terminal
The quantity for the radio resource that equipment 120 is distributed, determines the desired number (being hereinafter also referred to as " the second number ") of parameter.
In frame 308, the network equipment 110 sends the second number of parameter to terminal device 120.Correspondingly, in frame 309, eventually
End equipment 120 receives the second number of parameter from the network equipment 110.
In frame 310, terminal device 120 determines whether the second number of parameter is identical as the first number.If terminal device
120 determine that the second number of parameter is identical as the first number, then mean that the network equipment 110 is practical and distributed to terminal device 120
Quantity and the terminal device 120 of radio resource feed back the quantity of required radio resource identical, thus method 300
Proceed to frame 311.
In frame 311, the instruction that terminal device 120 sends at least expectation quality based on CSI to the network equipment 110 is updated
Multiple wave beam base vectors instruction and parameter.Correspondingly, in frame 312, the network equipment 110 receives this more from terminal device 120
The instruction of multiple wave beam base vectors after new and parameter.
On the other hand, it if terminal device 120 determines that the second number of parameter is different from the first number in frame 310, anticipates
The quantity that taste the practical radio resource distributed to terminal device 120 of the network equipment 110 carries out feedback institute with terminal device 120
The quantity of the radio resource needed is different, and thus method 300 proceeds to frame 313.
In frame 313, terminal device 120 at least updates instruction and the ginseng of multiple wave beam base vectors based on second number
Number.In some embodiments, terminal device 120 can update multiple wave beam basal orientations using the above-mentioned example pseudo-code of OMP algorithms
The instruction of amount and parameter.For example, terminal device 120 can be iteratively performed above-mentioned OMP algorithms, until the number of iteration reach with
Second number K (that is, k=K) of the associated parameter of combination (such as linear combination coefficient) of wave beam base vector.In each iteration
In, terminal device 120 selects a candidate beam base vector from the set B of candidate beam base vector；Wave beam based on selection
Base vector updates the instruction (for example, index of selected column vector) of wave beam base vector；And the wave beam base based on selection
The estimation of vector and the channel conditions between terminal device 120 and the network equipment 110, undated parameter.
It should be appreciated that the second number of parameter associated with the combination of wave beam base vector can be more than or less than the first number
Mesh.It is more than in the embodiment of the first number in the second number of parameter, terminal device 120 can be by the expectation quality based on CSI
The updated wave beam base vector of instruction above-mentioned example pseudo-code as OMP algorithms of instruction and parameter primary condition, with k=
K further updates instruction and the parameter of wave beam base vector as the condition of convergence.It is less than the first number in the second number of parameter
In embodiment, terminal device 120 can be by " c [0]=0；Initial strips of the Γ '=0 " as the above-mentioned example pseudo-code of OMP algorithms
Part updates instruction and the parameter of wave beam base vector using k=K as the condition of convergence.
In frame 314, terminal device 120 sends the multiple wave beam basal orientations being updated based on the second number to the network equipment 110
The instruction of amount and parameter.Correspondingly, in frame 315, the network equipment 110 receives updated multiple wave beams from terminal device 120
The instruction of base vector and parameter.
It should be appreciated that being equally applicable to method 300 above with reference to each feature described in Fig. 2, thus will not be described in great detail.
Communication means according to an embodiment of the present disclosure is described in detail above in association with Fig. 2 and Fig. 3.Below in conjunction with Fig. 4
Device according to an embodiment of the present disclosure is described with Fig. 5.
Fig. 4 shows the block diagram of the device 400 according to some embodiments of the disclosure.It is appreciated that device 400 can be real
Apply 120 side of terminal device shown in Fig. 1.It is received as shown in figure 4, device 400 (such as terminal device 120) includes precision instruction
Unit 410, the first updating unit 420 and feedback unit 430.
Precision instruction receiving unit 410 is configured as from the CSI between network equipment receiving terminal apparatus and the network equipment
Expectation quality first instruction.The second instruction and the group with multiple wave beam base vectors that CSI includes multiple wave beam base vectors
Close associated parameter.First updating unit 420 is configured as at least updating the second instruction and parameter based on the first instruction.Instead
Feedback unit 430 is configured as sending updated second instruction and updated parameter to the network equipment.
In some embodiments, device 400 further comprises：First determination unit is configured to determine that updated ginseng
The first several numbers；First transmission unit is configured as sending the first number to the network equipment；First receiving unit, is configured
To receive the second number of parameter from the network equipment.
In some embodiments, device 400 further comprises the second updating unit, is configured to respond to the second number not
It is same as the first number, the second instruction and parameter are at least updated based on the second number.
In some embodiments, the second updating unit further comprises iteration subelement, and it is following to be configured as iteration execution
It operates at least once, until the number of iteration reaches the second number：Candidate beam is selected from the set of candidate beam base vector
Base vector；Candidate beam base vector based on selection updates the second instruction；And the candidate beam base vector based on selection with
And the estimation of the channel conditions between terminal device and the network equipment, undated parameter.
In some embodiments, feedback unit 430 further comprises feeding back subelement, is configured to respond to the second number
It is identical as the first number, send updated second instruction and updated parameter to the network equipment.
In some embodiments, precision instruction receiving unit 410 further comprise command reception subelement, be configured as from
The network equipment receives the first instruction via high-level signaling or physical layer signaling.
In some embodiments, precision instruction receiving unit 410 be further configured to from the network equipment periodically or
Person aperiodically receives the first instruction.
In some embodiments, feedback subelement is further configured to send updated second finger in following one
Show：The communication bandwidth of wireless communication system；The single sub-band of communication bandwidth；And multiple sub-bands of communication bandwidth；And
Updated parameter is sent on single sub-band.
Fig. 5 shows the block diagram of the device 500 according to some embodiments of the disclosure.It is appreciated that device 500 can be real
Apply 110 side of the network equipment shown in Fig. 1.It is sent as shown in figure 5, device 500 (such as network equipment 110) includes precision instruction
Unit 510 and feedback reception unit 520.
Precision instruction transmission unit 510 is configured as sending the CSI between terminal device and the network equipment to terminal device
Expectation quality first instruction.The second instruction and the group with multiple wave beam base vectors that CSI includes multiple wave beam base vectors
Close associated parameter.Feedback reception unit 520 is configured as receiving from terminal device and is at least updated based on the first instruction
Second instruction and the parameter being updated.
In some embodiments, feedback reception unit 520 further comprises：First receiving subelement was configured as from end
End equipment receives the first number of parameter；First determination subelement is configured as based on the radio money distributed to terminal device
The quantity in source determines the second number of parameter；First transmission sub-unit is configured as sending the second number to terminal device；
In some embodiments, feedback reception unit 520 further comprises：Second receiving subelement, is configured to respond to
In the second number be different from the first number, from terminal device receive at least based on the second number be updated second instruction and by
Newer parameter.
In some embodiments, the second number is identical as the first number.
In some embodiments, device 500 further comprises resource allocation unit, is configured as based at least one of following
To determine the quantity of the radio resource distributed to terminal device：The situation of channel between terminal device and the network equipment；Eventually
The business need of end equipment；And the quantity of the available radio resource of the network equipment.
In some embodiments, precision instruction transmission unit 510 further comprise instruction sending unit, be configured as via
High-level signaling or physical layer signaling send the first instruction to terminal device.
In some embodiments, precision instruction transmission unit 510 is further configured to periodically or aperiodicity
Ground sends the first instruction to terminal device.
In some embodiments, the second receiving subelement is further configured to receive the second instruction in following one：
The communication bandwidth of wireless communication system；The single sub-band of communication bandwidth；And multiple sub-bands of communication bandwidth；And in list
Parameter is received on a sub-band.
It should be appreciated that each unit described in device 400 and 500 respectively with the method 200 that is described referring to figs. 2 to Fig. 3
It is corresponding with each action in 300.Therefore, it is equally applicable to device above in association with Fig. 1 to Fig. 3 operations described and feature
400 and 500 and unit wherein included, and have same effect, detail repeats no more.
Note that unit included in device 400 and 500 can profit realize in various manners, including software, hardware,
Firmware or its arbitrary combination.In one embodiment, one or more units can be realized using software and/or firmware, example
As stored machine-executable instruction on a storage medium.Other than machine-executable instruction or alternatively, device 400
It can be realized at least partly by one or more hardware logic components with some or all of unit in 500.As showing
Example and it is unrestricted, the hardware logic component for the exemplary type that can be used includes field programmable gate array (FPGA), special collection
At circuit (ASIC), application specific standard product (ASSP), system on chip (SOC), Complex Programmable Logic Devices (CPLD), etc..
These units shown in Fig. 4 and Fig. 5 can partially or entirely be embodied as hardware module, software module, consolidate
Part module or its arbitrary combination.Particularly, in certain embodiments, above-described flow, method or process can be by nets
Hardware in network equipment or terminal device is realized.For example, the network equipment or terminal device can utilize its transmitter, connect
It receives device, transceiver and/or processor or controller carrys out implementation method 200 and 300.
Fig. 6 shows the block diagram for the equipment 600 for being suitable for realizing embodiment of the disclosure.Equipment 600 can be used for realizing
The network equipment or terminal device.
As shown, equipment 600 includes controller 610.The operation of 610 control device 600 of controller and function.For example,
In certain embodiments, controller 610 can be executed by means of the instruction 630 stored in coupled memory 620
Various operations.Memory 620 can be any suitable type suitable for local technical environment, and can utilize any conjunction
Suitable data storage technology realizes that the memory device, magnetic memory device and system, light including but not limited to based on semiconductor deposit
Memory device and system.Although illustrate only a memory cell in Fig. 6, there can be multiple physics in equipment 600
Different memory cells.
Controller 610 can be any suitable type suitable for local technical environment, and may include but unlimited
In all-purpose computer, special purpose computer, microcontroller, digital signal controller (DSP) and based on controller multinuclear control
One or more of device framework is multiple.Equipment 600 can also include multiple controllers 610.Controller 610 and transceiver 640
Coupling, transceiver 640 can realize sending and receiving for information by means of one or more antennas 650 and/or other component.
Note that in disclosed context, transceiver 640 can be completed at the same time the device for sending and receiving data function；
Can be that only there is the device for sending or receiving data function.
When equipment 600 serves as the network equipment, controller 610 and transceiver 640 can be with compounding practices, to realize ginseng above
Examine the method 200 and 300 of Fig. 2 and Fig. 3 descriptions.When equipment 600 serves as terminal device, controller 610 and transceiver 640 can be with
Compounding practice, to realize the method 200 and 300 described above with reference to Fig. 2 and 3.For example, in some embodiments, above description
The action of related to data/information transmitting-receiving can be executed by transceiver 640, and other actions can be held by controller 610
Row.It is suitable for equipment 600 above with reference to all features described in Fig. 1-5, details are not described herein.
Fig. 7 shows the schematic diagram compared with the simulation performance of conventional method according to disclosed method.In simulations, false
The network equipment 110 is determined with 64 antennas and at the same time being communicated with 8 terminal devices (that is, terminal device 1 to 8).Each
Terminal device only has there are one antenna.These terminal devices, which are expected, accurately reports estimated channel to the network equipment 110
Vector, so that the network equipment 110 can determine precoding and be all terminal device services.
The network equipment 110 sends the instruction of the expectation quality ε of CSI to 8 terminal devices respectively.Expectation quality ε can be by
It is set as α | | h | |2, wherein α is smaller positive parameter.Expectation quality ε information and is only needed when it changes when being long
It is sent to terminal device.The network equipment 110 can be based on terminal device channel conditions and terminal device business demand in
At least one determine expectation quality ε.8 terminal devices only need channel status to estimate and obtain corresponding channel vector.
Then, each terminal device can execute the search of the submatrix of code book matrix B using the above-mentioned example pseudo-code of OMP algorithms,
To update instruction and the linear combination coefficient of multiple wave beam base vectors.
In simulations, DFT matrixes are used as codebook matrix B.It will be according to the performance of disclosed method and traditional scheme
Performance compare.The traditional scheme selects the submatrix of code book matrix B first, and is adopted for entire communication bandwidth
With the submatrix.Selection has the wave beam base vector of relatively high power from codebook matrix B during the unenhanced process of wave beam, to carry out
Feedback.In simulations, 8 column vectors have been selected from 64 × 8 codebook matrix B, to constitute the submatrix of codebook matrix BThen, linear combination coefficient is calculated according to following expression
Linear combination coefficientNumber be 8 and a sub-band for communication bandwidth needed to be reported.From code
The index of the column vector selected in this matrix B needs to be reported for entire communication bandwidth.Therefore, at each sub-band,
Each network equipment only needs report linear combination coefficientIt is assumed that each quantified linear combination coefficient include a bit simultaneously
And the average number of the linear combination coefficient on each sub-band is Ns, then occupied by the information reported on each sub-band
Bit total T=Nsa。
According in disclosed method, the selection of wave beam base vector can be directed to entire communication bandwidth, communication bandwidth
The single sub-band of multiple sub-bands or communication bandwidth carries out.In simulations, the selection of wave beam base vector is for each two son frequency
Band carries out primary.For each two sub-band, the son of code book matrix B is executed using the above-mentioned example pseudo-code of OMP algorithms
The search of matrix.Utilize obtained submatrix BΓ, the line for each sub-band can be calculated based on the above expression formula (4)
Property combination coefficient cw。
It is appreciated that by the submatrix B obtained on different sub-bandsΓCan be different, therefore in different sub-bands
Upper cwIn the number of linear combination coefficient can also be different.
It, will be according to the traditional C/S I of the scheme of the disclosure and the linear combination coefficient using fixed number when performance compares
Feedback scheme compares.Fig. 7 show 8 terminal devices and spectrum efficiency.The value of parameter alpha is 0.05 to 0.35
Variation in range.It can be seen that in complete CSI feedback scheme and using the traditional C/S I of the linear combination coefficient of fixed number anti-
There are apparent performance gaps between feedback scheme, and the performance that wider range is capable of providing according to the scheme of the disclosure selects.Work as α
When smaller, according to the performance of the scheme of the disclosure very close to complete CSI feedback scheme.Moreover, the linear combination system fed back
Several numbers is also larger.Table 1 shows the average number of linear combination coefficient on all the sub-bands.
Table 1
| α | 0.05 | 0.1 | 0.15 | 0.2 | 0.25 | 0.3 | 0.35 |
| Terminal device 1 | 52.1 | 28.2 | 14.2 | 7.9 | 4.8 | 3.5 | 3.0 |
| Terminal device 2 | 38.4 | 21.0 | 13.3 | 10.1 | 8.3 | 7.0 | 5.9 |
| Terminal device 3 | 44.9 | 19.6 | 10.3 | 7.8 | 6.4 | 5.2 | 4.1 |
| Terminal device 4 | 58.5 | 43.3 | 27.5 | 17.4 | 11.8 | 9.3 | 7.5 |
| Terminal device 5 | 47.3 | 25.1 | 15.0 | 11.3 | 9.6 | 8.5 | 7.7 |
| Terminal device 6 | 16.0 | 5.9 | 4.2 | 3.2 | 2.8 | 2.2 | 2.0 |
| Terminal device 7 | 51.3 | 29.5 | 17.4 | 12.3 | 9.9 | 8.0 | 6.7 |
| Terminal device 8 | 26.2 | 12.9 | 10.1 | 8.5 | 7.3 | 6.4 | 5.6 |
| Average number | 33.7 | 17.4 | 11.0 | 8.4 | 7.6 | 6.2 | 5.3 |
As can be seen from Table 1, with the increase of α, the number reduction of reduced performance and linear combination coefficient.Therefore, net
Network equipment can adaptively indicate the expectation of CSI according at least one in channel conditions and business need to terminal device
Precision.In addition, in order to obtain performance identical with the traditional C/S I feedback schemes of linear combination coefficient of fixed number are used, root
It only needs to include the linear combination coefficient with average number 7.1 according to the scheme of the disclosure, this makes narrowed number 10.5%.
In addition, from table 1 it can further be seen that being set for certain terminal devices, such as terminal device 4, terminal device 5 and terminal
Standby 7, approach the linear combination coefficient that channel vector needs greater number.For these terminal devices, use number for 8
Linear combination coefficient will cause larger performance to decline.On the other hand, the channel of certain terminal devices (such as terminal device 6) becomes
To sparse in height, therefore fewer number of linear combination coefficient is only needed to approach channel vector.Thus, in the case
It can lead to the waste of resource according to the traditional C/S I feedback schemes of the linear combination coefficient of fixed number.Therefore, for each end
The resource distribution of end equipment is necessary, and be will be according to the adaptive feedback scheme of the disclosure and reduced feedback overhead and true
Protect the effective scheme of feedback accuracy.It should be noted that (number of wherein linear combination coefficient is small for the searching algorithm based on OMP
In 8) can reach with using the similar performance of the traditional C/S I feedback schemes of linear combination coefficient of fixed number.In other words, base
More preferably wave beam base vector subset can be selected to reach more preferably performance in the searching algorithm of OMP.
Fig. 8 shows the linear combination when the traditional C/S I feedback schemes report of the linear combination coefficient using fixed number
The Cumulative Distribution Function figure of the spectrum efficiency of terminal device when the average number of coefficient is identical with according to the scheme of the disclosure.From figure
8 can see, and can reach higher frequency efficiency using according to the scheme of the disclosure.Specifically, according to the scheme of the disclosure
Average spectral efficiency (ase) it is higher by 2.6% than traditional C/S I feedback schemes.In addition, can further be seen that the side according to the disclosure from Fig. 8
The spectrum efficiency distribution of case is intended to have smaller variance.This shows compared to traditional C/S I feedback schemes, according to this public affairs
The scheme opened can be more liberally all terminal device services.
In general, the various example embodiments of the disclosure can hardware or special circuit, software, logic or its
What implements in combining.Some aspects can be implemented within hardware, and other aspects can by controller, microprocessor or
Implement in the firmware or software that other computing devices execute.When the various aspects of embodiment of the disclosure are illustrated or described as frame
When figure, flow chart or other certain graphical representations of use, it will be understood that box described herein, device, system, techniques or methods can
Using in terms of as unrestricted example in hardware, software, firmware, special circuit or logic, common hardware or controller or other
It calculates and implements in equipment or its certain combination.
As an example, embodiment of the disclosure can be described in the context of machine-executable instruction, machine can be held
Row instruction such as includes in the program module executed in device on the true or virtual processor of target.In general,
Program module includes routine, program, library, object, class, component, data structure etc., executes specific task or realizes specific
Abstract data structure.In embodiments, the function of program module can merge between described program module or
Segmentation.Machine-executable instruction for program module can execute in local or distributed apparatus.In distributed apparatus
In, program module can be located locally in remote medium storage the two.
The computer program code of method used to implement the present disclosure can be write with one or more programming languages.These
Computer program code can be supplied to the processing of all-purpose computer, special purpose computer or other programmable data processing units
Device so that program code by computer or other programmable data processing units execution when, cause flow chart and/
Or function/operation specified in block diagram is carried out.Program code can completely on computers, part on computers, conduct
Independent software package, part are on computers and part is held on a remote computer or server on the remote computer or completely
Row.
In the context of the disclosure, machine readable media can be include or storage be used for or about instruction execution system
Any tangible medium of the program of system, device or equipment.Machine readable media can be that machine-readable signal medium or machine can
Read storage medium.Machine readable media can include but is not limited to electronics, magnetic, it is optical, electromagnetism, infrared or partly lead
Body system, device or equipment equipment or its any appropriate combination.The more detailed example of machine readable storage medium includes carrying one
Or the electrical connection of multiple conducting wires, portable computer diskette, hard disk, random access memories (RAM), read-only memory
(ROM), Erasable Programmable Read Only Memory EPROM (EPROM or flash memory), light storage device, magnetic storage apparatus or its is any appropriate
Combination.
In addition, although operation is depicted with particular order, this simultaneously should not be construed and require this generic operation to show
Particular order is completed with sequential order, or executes the operation of all diagrams to obtain expected result.In some cases, more
Task or parallel processing can be beneficial.Similarly, although discussed above contain certain specific implementation details, this is not
It should be interpreted that any invention of limitation or the scope of the claims, and should be interpreted that the specific embodiment to specific invention can be directed to
Description.Certain features in this specification described in the context of separated embodiment can also combined implementation single real
It applies in example.Conversely, various features described in the context of single embodiment can also discretely multiple embodiments or
Implement in any appropriate sub-portfolio.
Although with specific to the language description of structural features and or methods of action theme, but it is to be understood that institute
The theme limited in attached claim is not limited to above-described special characteristic or action.On the contrary, above-described specific spy
Action of seeking peace is disclosed as the exemplary forms for realizing claim.
Claims (32)
1. a kind of method implemented at terminal device in a wireless communication system, including：
The expectation quality of the channel state information (CSI) between the terminal device and the network equipment is received from the network equipment
First instruction, the CSI include multiple wave beam base vectors second instruction and the combination with the multiple wave beam base vector
Associated parameter；
At least the first instruction based on the expectation quality indicates and the parameter to update described second；And
Updated second instruction and the updated parameter are sent to the network equipment.
2. according to the method described in claim 1, further comprising：
Determine the first number of the updated parameter；
First number is sent to the network equipment；And
The second number of the parameter is received from the network equipment.
3. according to the method described in claim 2, further comprising：
It is different from first number in response to second number, described second is at least updated based on second number and is referred to
Show and the parameter.
4. according to the method described in claim 3, wherein at least updating second instruction and institute based on second number
Stating parameter includes：
Iteration executes following operation at least once, until the number of the iteration reaches second number：
Candidate beam base vector is selected from the set of candidate beam base vector；
The candidate beam base vector based on selection indicates to update described second；And
The candidate beam base vector based on selection and the channel shape between the terminal device and the network equipment
The estimation of condition updates the parameter.
5. according to the method described in claim 2, wherein to the network equipment send it is updated it is described second instruction and
The updated parameter includes：
It is identical as first number in response to second number, it sends updated described second to the network equipment and refers to
Show and the updated parameter.
6. according to the method described in claim 1, wherein receiving the first instruction packet of the expectation quality from the network equipment
It includes：
The first instruction of the expectation quality is received via high-level signaling or physical layer signaling from the network equipment.
7. according to the method described in claim 1, wherein receiving the first instruction packet of the expectation quality from the network equipment
It includes：
The first instruction of the expectation quality periodically or is aperiodically received from the network equipment.
8. according to the method described in claim 1, wherein to the network equipment send it is updated it is described second instruction and
The updated parameter includes：
Updated second instruction is sent in following one：
The communication bandwidth of the wireless communication system,
The single sub-band of the communication bandwidth, and
Multiple sub-bands of the communication bandwidth；And
The updated parameter is sent on the single sub-band.
9. a kind of method implemented at network equipment in a wireless communication system, including：
The expectation quality of the channel state information (CSI) between the terminal device and the network equipment is sent to terminal device
First instruction, the CSI include multiple wave beam base vectors second instruction and the combination with the multiple wave beam base vector
Associated parameter；And
From the terminal device receive at least based on the expectation quality first instruction be updated it is described second instruction and
The parameter being updated.
10. according to the method described in claim 9, further comprising：
The first number of the parameter is received from the terminal device；
Based on the quantity of the radio resource distributed to the terminal device, the second number of the parameter is determined；And
Second number is sent to the terminal device.
11. according to the method described in claim 10, wherein described second number is different from first number；And
Wherein second instruction is received from the terminal device and the parameter includes：
Second instruction being at least updated based on second number and the institute being updated are received from the terminal device
State parameter.
12. according to the method described in claim 10, wherein described second number is identical as first number.
13. according to the method described in claim 10, further comprising：
The quantity of the radio resource distributed to the terminal device is determined based at least one of following：
The situation of channel between the terminal device and the network equipment,
The business need of the terminal device, and
The quantity of the available radio resource of the network equipment.
14. according to the method described in claim 9, wherein sending the first instruction packet of the expectation quality to the terminal device
It includes：
The first instruction of the expectation quality is sent to the terminal device via high-level signaling or physical layer signaling.
15. according to the method described in claim 9, wherein sending the first instruction packet of the expectation quality to the terminal device
It includes：
The first instruction of the expectation quality periodically or is aperiodically sent to the terminal device.
16. according to the method described in claim 9, wherein receiving second instruction and the parameter from the terminal device
Including：
Second instruction is received in following one：
The communication bandwidth of the wireless communication system,
The single sub-band of the communication bandwidth, and
Multiple sub-bands of the communication bandwidth；And
The parameter is received on the single sub-band.
17. a kind of terminal device, including：
Controller；And
It is coupled to the memory of the controller, the memory includes instruction, and described instruction by the controller when being executed
Make the terminal device：
The expectation quality of the channel state information (CSI) between the terminal device and the network equipment is received from the network equipment
First instruction, the CSI include multiple wave beam base vectors second instruction and the combination with the multiple wave beam base vector
Associated parameter；
At least the first instruction based on the expectation quality indicates and the parameter to update described second；And
Updated second instruction and the updated parameter are sent to the network equipment.
18. terminal device according to claim 17, wherein described instruction further make when being executed by the controller
The terminal device：
Determine the first number of the updated parameter；
First number is sent to the network equipment；And
The second number of the parameter is received from the network equipment.
19. terminal device according to claim 18, wherein described instruction further make when being executed by the controller
The terminal device：
It is different from first number in response to second number, described second is at least updated based on second number and is referred to
Show and the parameter.
20. terminal device according to claim 19 is wherein at least updated described second based on second number and referred to
Show and includes with the parameter：
Iteration executes following operation at least once, until the number of the iteration reaches second number：
Candidate beam base vector is selected from the set of candidate beam base vector；
The candidate beam base vector based on selection indicates to update described second；And
The candidate beam base vector based on selection and the channel shape between the terminal device and the network equipment
The estimation of condition updates the parameter.
21. terminal device according to claim 18 refers to wherein sending updated described second to the network equipment
Show and the updated parameter includes：
It is identical as first number in response to second number, it sends updated described second to the network equipment and refers to
Show and the updated parameter.
22. terminal device according to claim 17, wherein receiving the first of the expectation quality from the network equipment
Instruction includes：
The first instruction of the expectation quality is received via high-level signaling or physical layer signaling from the network equipment.
23. terminal device according to claim 17, wherein receiving the first of the expectation quality from the network equipment
Instruction includes：
The first instruction of the expectation quality periodically or is aperiodically received from the network equipment.
24. terminal device according to claim 17 refers to wherein sending updated described second to the network equipment
Show and the updated parameter includes：
Updated second instruction is sent in following one：
The communication bandwidth of the wireless communication system,
The single sub-band of the communication bandwidth, and
Multiple sub-bands of the communication bandwidth；And
The updated parameter is sent on the single sub-band.
25. a kind of network equipment, including：
Controller；And
It is coupled to the memory of the controller, the memory includes instruction, and described instruction by the controller when being executed
Make the network equipment：
The expectation quality of the channel state information (CSI) between the terminal device and the network equipment is sent to terminal device
First instruction, the CSI include multiple wave beam base vectors second instruction and the combination with the multiple wave beam base vector
Associated parameter；And
From the terminal device receive at least based on the expectation quality first instruction be updated it is described second instruction and
The parameter being updated.
26. the network equipment according to claim 25, wherein described instruction further make when being executed by the controller
The network equipment：
The first number of the parameter is received from the terminal device；
Based on the quantity of the radio resource distributed to the terminal device, the second number of the parameter is determined；And
Second number is sent to the terminal device.
27. the network equipment according to claim 26, wherein second number is different from first number；And
Wherein second instruction is received from the terminal device and the parameter includes：
Second instruction being at least updated based on second number and the institute being updated are received from the terminal device
State parameter.
28. the network equipment according to claim 26, wherein second number is identical as first number.
29. the network equipment according to claim 26, wherein described instruction further make when being executed by the controller
The network equipment：
The quantity of the radio resource distributed to the terminal device is determined based at least one of following：
The situation of channel between the terminal device and the network equipment,
The business need of the terminal device, and
The quantity of the available radio resource of the network equipment.
30. the network equipment according to claim 25, wherein sending the first of the expectation quality to the terminal device
Instruction includes：
The first instruction of the expectation quality is sent to the terminal device via high-level signaling or physical layer signaling.
31. the network equipment according to claim 25, wherein sending the first of the expectation quality to the terminal device
Instruction includes：
The first instruction of the expectation quality periodically or is aperiodically sent to the terminal device.
32. the network equipment according to claim 25, wherein receiving second instruction and institute from the terminal device
Stating parameter includes：
Second instruction is received in following one：
The communication bandwidth of the wireless communication system,
The single sub-band of the communication bandwidth, and
Multiple sub-bands of the communication bandwidth；And
The parameter is received on the single sub-band.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113078931A (en) * | 2021-03-26 | 2021-07-06 | 安徽大学 | Millimeter wave large-scale MIMO hybrid precoding method and system based on QGA-OMP algorithm |
| WO2023061221A1 (en) * | 2021-10-15 | 2023-04-20 | 中兴通讯股份有限公司 | Method and apparatus for acquiring channel state information, terminal, electronic device, and computer-readable storage medium |
| WO2023082154A1 (en) * | 2021-11-11 | 2023-05-19 | Oppo广东移动通信有限公司 | Method and apparatus for updating csi feedback solution, device and storage medium |
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