CN110535514A - Channel state information feedback method, device and terminal device - Google Patents

Channel state information feedback method, device and terminal device Download PDF

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Publication number
CN110535514A
CN110535514A CN201910245174.7A CN201910245174A CN110535514A CN 110535514 A CN110535514 A CN 110535514A CN 201910245174 A CN201910245174 A CN 201910245174A CN 110535514 A CN110535514 A CN 110535514A
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China
Prior art keywords
parameter
frequency domain
code book
class frequency
value
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CN201910245174.7A
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Inventor
郑国增
吴昊
李永
鲁照华
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ZTE Corp
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ZTE Corp
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Priority to CN201910245174.7A priority Critical patent/CN110535514A/en
Publication of CN110535514A publication Critical patent/CN110535514A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • 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
    • 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
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

The application proposes a kind of channel state information (CSI) feedback method, device, terminal device and storage medium, wherein method includes: that the number of the airspace base vector of code book is compressed according to the second class frequency domain, the selection of the other parameters in addition to the number of the airspace base vector of limitation the second class frequency domain compression code book；CSI report using reference signal measurement comprising the second class frequency domain compression code book.The application can reduce CSI feedback expense under the premise of not influencing CSI feedback precision.

Description

Channel state information feedback method, device and terminal device
Technical field
This application involves the communications fields, and in particular to channel state information feedback method, device and terminal device.
Background technique
It is multiple-input and multiple-output that channel state information (CSI, Channel State Information), which quantifies feedback technique, One important component of (MIMO, Multiple Input Multiple Output) technology.Terminal device can use Second class frequency domain compresses code book and precoding instruction information is fed back to base station.Second class frequency domain compresses code book fed-back channel status letter The precision of breath is higher, but computation complexity is higher and feedback overhead is larger.Still CSI feedback essence is not being influenced in the prior art Under the premise of degree, the method for reduction CSI feedback expense and CSI report delay of feedback.
Summary of the invention
In order to solve at least one above-mentioned technical problem, the embodiment of the present application provides following scheme.
The embodiment of the present application provides a kind of CSI feedback method, comprising:
The number of the airspace base vector of code book is compressed according to the second class frequency domain, limitation the second class frequency domain compression code book removes institute State the selection of the other parameters except the number of airspace base vector；
CSI report using reference signal measurement comprising the second class frequency domain compression code book.
The embodiment of the present application provides the method for determining CPU a kind of, comprising:
The parameter that code book is compressed according to the second class frequency domain determines that the same time occupies the quantity of CPU and occupies a CPU's At least one of in time.
The embodiment of the present application provides a kind of CSI feedback device, comprising:
Parameter limits module, and the number of the airspace base vector for compressing code book according to the second class frequency domain limits the second class Frequency domain compresses the selection of the other parameters in addition to the number of the airspace base vector of code book；
Measurement module, for the CSI report using reference signal measurement comprising the second class frequency domain compression code book.
The embodiment of the present application provides in the device of determining CPU a kind of, including quantity determining module and time determining module At least one of；
The quantity determining module determines that the same time occupies CPU for compressing the parameter of code book according to the second class frequency domain Quantity；
The time determining module, for compressing the parameter of code book according to the second class frequency domain, determine occupy CPU when Between.
The embodiment of the present application provides a kind of terminal device for CSI feedback, comprising: processor and memory；
The memory is for storing instruction；
Any institute of CSI feedback is realized the processor is configured to reading described instruction to execute the embodiment of the present application such as State method.
The embodiment of the present application provides the terminal device of determining CPU a kind of, comprising: processor and memory；
The memory is for storing instruction；
The processor is configured to read described instruction with execute the embodiment of the present application determine CPU it is any as described in Method.
The embodiment of the present application provides a kind of storage medium, which is stored with computer program, the computer CSI feedback is realized when program is executed by processor or determines described in any item methods of CPU.
CSI feedback method provided by the embodiment of the present application, the selection of the parameter of limitation the second class frequency domain compression code book；It CSI report of the measurement comprising the second class frequency domain compression code book afterwards.The feedback accuracy that second class frequency domain compresses code book is higher, and And due to limiting the selection of parameter, the expense of CSI feedback can reduce.To realize the flat of feedback accuracy and feedback overhead Weighing apparatus.The embodiment of the present application also provides the method for determining CPU a kind of, determine that the same time occupies the quantity and occupancy one of CPU At least one of in the time of CPU, since it is determined occupying the quantity of CPU and/or occupying the time of a CPU, can reduce The delay of CSI feedback.
Detailed description of the invention
Fig. 1 is a kind of CSI feedback method implementation process schematic diagram of the embodiment of the present application；
Fig. 2 is the implementation process schematic diagram of step S12 in a kind of CSI feedback method of the embodiment of the present application；
Fig. 3 is the method implementation process schematic diagram of determining CPU of the embodiment of the present application a kind of；
Fig. 4 is a kind of CSI feedback apparatus structure schematic diagram of the embodiment of the present application；
Fig. 5 is the apparatus structure schematic diagram of determining CPU of the embodiment of the present application a kind of；
Fig. 6 is the terminal device structural schematic diagram of the embodiment of the present application.
Specific embodiment
For the purposes, technical schemes and advantages of the application are more clearly understood, below in conjunction with attached drawing to the application Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application Feature can mutual any combination.
In the method for carrying out CSI feedback using the second class frequency domain compression code book, terminal device is measured using reference signal CSI report in may include N layer the second class frequency domain compression code book.Wherein, the value of N is equal to order instruction (RI, Rank Indicator value).Network side can according to dispatching requirement or equipment/device/memory ability, to equipment/device/ The maximum number of plies that memory can be fed back is limited, and N is denoted asmax, wherein N≤Nmax.If network side does not configure Nmax, then NmaxIt is defaulted as the number of plies that equipment/device/memory capabilities maximum can be supported.
The a certain layer of second class frequency domain compression code book can indicate are as follows:
Wherein, W1For the matrix that airspace base vector is constituted, W1Dimension is 2N1N2× 2L, form are as follows:
Wherein, 2N1N2Indicate channel state information reference signals (CSI-RS, Channel State Information Reference Signal) port number, N1Indicate the CSI-RS port number of the first dimension in same polarization direction, N2Indicate same The CSI-RS port number of second dimension in polarization direction, coefficient 2 indicate dual polarization.The number of L expression airspace base vector.L(L∈ { 2,3,4,5,6 }) a airspace base vector v0,v1,…,vL-1It is orthogonal, concrete form are as follows:
SymbolIndicate Kronecker product, O1,O2For oversample factor.In general, W1In information be broadband feedback , i.e., for frequency domain unit different in entire CSI feedback bandwidth, W1In information be identical.WfIt is by frequency domain base vector structure At matrix, dimension N3× M:
Wf=[f0 f1 … fM-1]
Wherein N3Indicate the number of frequency domain unit, N3=R × NSB(R ∈ { 1,2 }), NSBIndicate the subband number of CSI feedback.M frequency domain base vector f0,f1,...,fM-1It is orthogonal, concrete form are as follows:
Wherein O3For oversample factor.Dimension be 2L × M, indicate airspace base vector and frequency domain base vector weighting system Number, needs its amplitude and phase carrying out quantization feedback.Since the amplitude of partial weighting coefficient is likely to be quantified as 0, cause The waste of feedback overhead.Therefore it only needs to choosePart coefficient fed back, the weighting coefficient not fed back is defaulted as 0.In total It needs to feed backA weighting coefficient, whereinIndicate that it is needed by the bit diagram of 2LM size The position for the weighting coefficient to be fed back.
In above content, parameter L, parameter 2N1N2, number of plies N, maximum feedback number of plies Nmax, parameter p, parameter beta, parameter R be The parameter of second class frequency domain compression code book.
Wherein, parameter L indicates that the number of airspace base vector, the possibility value of L are 2,3,4,5 or 6.
Parameter 2N1N2Indicate CSI-RS port number.
Parameter p be and M and NSBThe possibility value of relevant parameter, p isWherein, M indicates frequency domain The number of base vector, NSBIndicate the subband number of CSI feedback.
Parameter beta is and KNZAnd the relevant parameter of 2LM, the possibility value of β areWherein, 2LM indicates bit Figure size, KNZIndicate the number of the weighting coefficient for the airspace base vector and frequency domain base vector that needs are fed back.
The parameter R is and N3And NSBRelevant parameter, the possibility value of R are 1 or 2.Wherein, N3Indicate frequency domain unit Number, NSBIndicate the subband number of CSI feedback.
Based on the above content, the embodiment of the present application proposes a kind of CSI feedback method, if Fig. 1 is the embodiment of the present application proposition CSI feedback method implementation process schematic diagram, comprising:
S11: compressing the number of the airspace base vector of code book according to the second class frequency domain, limitation the second class frequency domain compression code book The selection of other parameters in addition to the number of the airspace base vector；
S12: the CSI report using reference signal measurement comprising the second class frequency domain compression code book.
Wherein, the other parameters in step S11 include but is not limited to above-mentioned CSI-RS port number, number of plies N, parameter p, ginseng The number of plies of number, parameter R and the number using the airspace base vector.
When the value of the number (i.e. parameter L) of airspace base vector is 6, the computation complexity and feedback overhead of CSI feedback It is larger.Therefore, the embodiment of the present application can limit the selection of the other parameters of the second class frequency domain compression code book, thus as much as possible Limit the computation complexity and feedback overhead of CSI feedback.
The application can use following scheme.
Scheme one: the selection of single parameter is limited.
When the value of L is 6,2N is limited1N2Selection.For example, meeting 2N1N2≥32。
Alternatively, limiting the selection of number of plies N when the value of L is 6.For example, N≤2.
Alternatively, limiting the selection of parameter p when the value of L is 6.For example, p is equal to
Alternatively, limiting the selection of parameter beta when the value of L is 6.For example, β is configured toOr it is configured toWith
Alternatively, limiting the selection of parameter R when the value of L is 6.For example, R is equal to 1.
Scheme two: the selection of multiple parameters is limited.
When the value of L is 6, the number of plies N and 2N are limited1N2Selection.For example, meeting N≤2, and 2N1N2≥32.Such as table Shown in 1.
Table 1
L N 2N1N2
6 ≤2 ≥32
Alternatively, limiting number of plies N, 2N when the value of L is 61N2And the selection of parameter p.For example, meeting N≤2,2N1N2≥ 32 and p is equal to 1/4.As shown in table 2.
Table 2
Alternatively, limiting number of plies N, 2N when the value of L is 61N2And the selection of parameter beta.For example, meet N≤2,2N1N2≥ 32, and β is equal to 1/4 or β and is configurable to 1/4 or 1/2.As shown in table 3A and table 3B.
Table 3A
Table 3B
Alternatively, limiting number of plies N, 2N when the value of L is 61N2, parameter p and parameter beta selection.For example, meet N≤2, 2N1N2>=32, parameter p and β use the fixed Combination as shown in following table 4A or table 4B or table 4C.
Table 4A
Table 4B
Table 4C
Alternatively, limitation uses the number of plies and 2N when the value of L is 61N2Selection.For example, meeting 2N1N2>=32, and make The number of plies for being 6 with L is no more than 2.One specific example is, when the N=3 or 4 of terminal feedback, can only at most have two layers makes It is 6 with L, other layers of L is necessarily less than 6.
As shown in Fig. 2, in one embodiment, above-mentioned steps S12 includes:
Step S121: compressing the parameter of code book according to the second class frequency domain, the channel status occupied when determining measurement CSI report Information process unit (CPU, CSI Processing Unit), the channel state information processing unit is for describing terminal/dress Set/memory while the ability of CSI report being handled, a CSI report can occupy one or more channel status letter simultaneously Cease processing unit；
Step S122: the CSI report is measured using the CPU of the occupancy.
Wherein, step S122 can be with are as follows: the parameter that code book is compressed according to the second class frequency domain determines that the same time occupies CPU Quantity and occupy a CPU time at least one of.
Since the computation complexity of CSI feedback and the second class frequency domain compress the relating to parameters of code book, terminal device root It can choose suitable CPU according to the parameter of the second class frequency domain compression code book and occupy quantity and the same CPU holding time, for surveying Measure CSI report.
A kind of method that the embodiment of the present application also proposes determining CPU, if Fig. 3 is this method implementation process schematic diagram, comprising:
Step S31: the parameter of the second class frequency domain compression code book is obtained；
Step S32: compressing the parameter of code book according to the second class frequency domain, determines that the same time occupies the quantity and occupancy of CPU At least one of in the time of one CPU.
Wherein, the parameter of the second class frequency domain compression code book includes: parameter L, parameter 2N1N2, maximum feedback number of plies Nmax, parameter P, parameter and parameter R.
Wherein, parameter L indicates that the number of airspace base vector, the possibility value of L are 2,3,4,5 or 6.
Parameter 2N1N2Indicate CSI-RS port number.
Parameter p be and M and NSBThe possibility value of relevant parameter, p isWherein, M indicates frequency domain base The number of vector, NSBIndicate the subband number of CSI feedback.
Parameter beta is and KNZAnd the relevant parameter of 2LM, the possibility value of β areWherein, 2LM indicates bit Figure size, KNZIndicate the number of the weighting coefficient for the airspace base vector and frequency domain base vector that needs are fed back.
The parameter R is and N3And NSBRelevant parameter, the possibility value of R are 1 or 2.Wherein, N3Indicate frequency domain unit Number, NSBIndicate the subband number of CSI feedback.
In one embodiment, the parameter that code book is compressed according to the second class frequency domain determines that the same time occupies the number of CPU Amount, comprising:
According to parameter L, parameter R and NmaxIn any one or two determinations same time occupy the quantity of CPU；Alternatively,
According to parameter L, parameter R and NmaxDetermine that the same time occupies the quantity of CPU.
In one embodiment, determine that the same time occupies the mode of the quantity of CPU just like table 5A institute according to parameter L Show.
Table 5A
L The same time occupies the quantity of CPU
2 1
4 2
6 3
In one embodiment, determine that the same time occupies such as table 5B institute of mode two of the quantity of CPU according to parameter L Show.
Table 5B
L The same time occupies the quantity of CPU
2 or 4 1
6 2
In table 5A and 5B, determine that the same time occupies the quantity (secondary series) of CPU according to the value (first row) of L.
In one embodiment, determine that the mode of the quantity of same time occupancy CPU is as shown in table 6 according to parameter R.
Table 6
R The same time occupies the quantity of CPU
1 1
2 2
In table 6, determine that the same time occupies the quantity (secondary series) of CPU according to the value (first row) of R.
In one embodiment, according to parameter NmaxDetermine that the mode of the quantity of same time occupancy CPU is as shown in table 7.
Table 7
In table 7, according to NmaxValue (first row) determine that same time occupies the quantity (secondary series) of CPU.
In one embodiment, determine that the same time occupies the mode of the quantity of CPU just like 8 institute of table according to parameter L and R Show.
Table 8
L=2 L=4 L=6
R=1 1 2 3
R=2 2 4 6
In table 8, the first row indicates the value of L, and first row indicates the value of R, and table middle section is indicated according to L and R The determining same time occupies the quantity of CPU.For example, working as L=2, and when R=1, determine that the same time occupies the quantity of CPU It is 1.
In one embodiment, determine that the same time occupies such as 9 institute of table of mode two of the quantity of CPU according to parameter L and R Show.
Table 9
L=2 or 4 L=6
R=1 1 2
R=2 2 4
In table 9, the first row indicates the value of L, and first row indicates the value of R, and table middle section is indicated according to L and R The determining same time occupies the quantity of CPU.For example, working as L=2 or 4, and when R=1, determine that the same time occupies the number of CPU Amount is 1.
In one embodiment, according to parameter L and NmaxDetermine that the same time occupies the mode of the quantity of CPU just like table Shown in 10.
Table 10
L=2 L=4 L=6
Nmax=1 or 2 1 2 3
Nmax=3 or 4 2 4 6
In table 10, the first row indicates the value of L, and first row indicates NmaxValue, table middle section indicate according to L And NmaxThe determining same time occupies the quantity of CPU.For example, working as L=2, and NmaxWhen=1 or 2, determine that the same time occupies The quantity of CPU is 1.
In one embodiment, according to parameter L and NmaxDetermine that the same time occupies the mode two such as table of the quantity of CPU Shown in 11.
Table 11
L=2 or 4 L=6
Nmax=1 or 2 1 2
Nmax=3 or 4 2 4
In table 11, the first row indicates the value of L, and first row indicates NmaxValue, table middle section indicate according to L And NmaxThe determining same time occupies the quantity of CPU.For example, working as L=2 or 4, and NmaxWhen=1 or 2, the same time is determined The quantity for occupying CPU is 1.
In one embodiment, according to parameter R and NmaxDetermine that the same time occupies the mode such as table 12 of the quantity of CPU It is shown.
Table 12
Nmax=1 or 2 Nmax=3 or 4
R=1 1 2
R=2 2 4
In table 12, the first row indicates NmaxValue, first row indicate R value, table middle section indicate basis NmaxThe quantity of CPU is occupied with the same time that R is determined.For example, working as Nmax=1 or 2, and when R=1, determine that the same time accounts for It is 1 with the quantity of CPU.
In one embodiment, according to parameter L, R and NmaxDetermine same time occupy the mode of the quantity of CPU just like Shown in table 13.
Table 13
In table 13, first row indicates L, R and NmaxValue, secondary series indicates that same time occupies the quantity of CPU.Root The value of secondary series is determined according to the value of first row.For example, working as L=2, R=1 and NmaxWhen=1 or 2, determine that the same time accounts for It is 1 with the quantity of CPU.
In one embodiment, according to parameter L, R and NmaxDetermine that the same time occupies the mode two of the quantity of CPU such as Shown in table 14.
Table 14
{L,R,Nmax} The same time occupies the quantity of CPU
{ (2 or 4), 1, (1 or 2) } 1
{ (2 or 4), 2, (1 or 2) } 2
{ (2 or 4), 1, (3 or 4) } 3
{ (2 or 4), 2, (3 or 4) } 4
{ 6,1, (1 or 2) } 2
{ 6,2, (1 or 2) } 4
{ 6,1, (3 or 4) } 6
{ 6,2, (3 or 4) } 8
In table 14, first row indicates L, R and NmaxValue, secondary series indicates that same time occupies the quantity of CPU.Root The value of secondary series is determined according to the value of first row.For example, working as L=2 or 4, R=1 and NmaxWhen=1 or 2, determine with for the moment Between occupy CPU quantity be 1.
In one embodiment, the parameter of code book is compressed according to the second class frequency domain, determines the time for occupying a CPU, Include:
Determine parameter Z and parameter Z', the parameter Z and parameter Z' for true according to the parameter that the second class frequency domain compresses code book Surely the time of a CPU is occupied；
Wherein, parameter Z (unit is symbol) is indicated from first symbol after the channel of scheduling CSI report to reporting Time interval between first symbol of CSI report；
Parameter Z'(unit is symbol) it indicates from the last symbol of the reference signal for measuring CSI report to reporting Time interval between first symbol of CSI report.
The application proposes to determine following three kinds of modes of parameter Z and parameter Z', comprising:
The first, static configuration (Z, Z'):
The maximum value within the scope of parameter value is configured by the parameters of the second class frequency domain compression code book；According to matching The parameter of the second class frequency domain compression code book postponed determines parameter Z and parameter Z'.Specifically, base station is according to different terminal equipment Ability, the maximum value that can be configured by all parameters designs (Zmax,Z'max), so that terminal device is under any parameter configuration CSI report can be uploaded in the designated time.
Second, it is semi-statically configured (Z, Z'):
Under current base station and terminal unit ability, different values is configured for some parameter or parameter combination, remaining Parameter configuration maximum value determines corresponding (Z, Z').Specifically, there are several types of modes:
By the 2N of the second class frequency domain compression code book1N2The different value being configured within the scope of parameter value, by the second class frequency domain pressure Remaining parameter configuration of contracting code book is the maximum value within the scope of parameter value；According to the second class frequency domain compression code book postponed Parameter determines the different value of (Z, Z')；Alternatively,
By the N of the second class frequency domain compression code bookmaxThe different value being configured within the scope of parameter value, by the second class frequency domain pressure Remaining parameter configuration of contracting code book is the maximum value within the scope of parameter value；According to the second class frequency domain compression code book postponed Parameter determines the different value of (Z, Z')；Alternatively,
The different value within the scope of parameter value is configured by the parameter L of the second class frequency domain compression code book, by the second class frequency domain Remaining parameter configuration of code book is compressed for the maximum value within the scope of parameter value；Code book is compressed according to the second class frequency domain postponed Parameter determine (Z, Z') different value；Alternatively,
The different value within the scope of parameter value is configured by the parameter R of the second class frequency domain compression code book, by the second class frequency domain Remaining parameter configuration of code book is compressed for the maximum value within the scope of parameter value；Code book is compressed according to the second class frequency domain postponed Parameter determine (Z, Z') different value；Alternatively,
By the 2N of the second class frequency domain compression code book1N2And NmaxThe different value being configured within the scope of parameter value, by the second class Frequency domain compresses remaining parameter configuration of code book for the maximum value within the scope of parameter value, compresses according to the second class frequency domain postponed The parameter of code book determines the different value of (Z, Z')；Alternatively,
By the 2N of the second class frequency domain compression code book1N2And parameter L is configured to the different value within the scope of parameter value, by second Class frequency domain compresses remaining parameter configuration of code book for the maximum value within the scope of parameter value, according to described with the second class postponed frequency The parameter that code book is compressed in domain determines the different value of (Z, Z')；Alternatively,
By the N of the second class frequency domain compression code bookmaxAnd parameter R is configured to the different value within the scope of parameter value, by the second class Frequency domain compresses remaining parameter configuration of code book for the maximum value within the scope of parameter value, according to described with the second class frequency domain postponed The parameter for compressing code book determines the different value of (Z, Z')；Alternatively,
The different value within the scope of parameter value is configured by the parameter L and parameter R of the second class frequency domain compression code book, by second Class frequency domain compresses remaining parameter configuration of code book for the maximum value within the scope of parameter value, according to described with the second class postponed frequency The parameter that code book is compressed in domain determines the different value of (Z, Z')；Alternatively,
By the 2N of the second class frequency domain compression code book1N2、NmaxAnd parameter L is configured to the different value within the scope of parameter value, it will Second class frequency domain compresses remaining parameter configuration of code book for the maximum value within the scope of parameter value, according to described with postpone second The parameter that class frequency domain compresses code book determines the different value of (Z, Z')；Alternatively,
By the 2N of the second class frequency domain compression code book1N2、NmaxAnd parameter R is configured to the different value within the scope of parameter value, it will Second class frequency domain compresses remaining parameter configuration of code book for the maximum value within the scope of parameter value, according to described with postpone second The parameter that class frequency domain compresses code book determines the different value of (Z, Z').
The third, dynamic configuration (Z, Z'):
According to the parameter configuration of current CSI report, the time required to obtaining calculating CSI feedback in real time.One concrete implementation Mode is fed back according to terminal under the computation complexity of terminal feedback CSI under current configuration parameters and maximum parameter configuration parameter The computation complexity of CSI converts.
In one embodiment, the practical value that the parameter of code book is compressed according to the second class frequency domain determines measurement CSI report The actual complex degree of announcement；And according to the maximum value in the value range of the parameter of the second class frequency domain compression code book, measurement CSI is determined The maximum complexity of report；Parameter Z and parameter Z' are determined according to the actual complex degree and the maximum complexity.
In one embodiment, using following formula calculating parameter Z and parameter Z'.
Wherein, ZmaxAnd Z'maxRespectively parameter value range is configured by the parameters of the second class frequency domain compression code book The value of the parameter Z and parameter Z' that are determined when interior maximum value.The computation complexity of CSI report and the ability of different terminal equipment have It closes.
In the embodiment above, terminal device determines that the same time occupies using the parameter of the second class frequency domain compression code book The quantity of CPU or the time for occupying a CPU.Since the second class frequency domain compresses meter of the selection to CSI feedback of the parameter of code book It calculates complexity to have an impact, therefore can be matched with computation complexity according to the CPU that design parameter determines.
The embodiment of the present application also proposes a kind of CSI feedback device, if Fig. 4 is the apparatus structure schematic diagram, comprising:
Parameter limits module 410, the number of the airspace base vector for compressing code book according to the second class frequency domain, limitation second Class frequency domain compresses the selection of the other parameters in addition to the number of the airspace base vector of code book；
Measurement module 420, for the CSI report using reference signal measurement comprising the second class frequency domain compression code book.
In one embodiment, the other parameters include: CSI-RS port number, number of plies N, parameter p, parameter beta, parameter R and using in the number of plies at least one of.
Wherein, parameter p is and M and NSBRelevant parameter；Wherein, M indicates the number of frequency domain base vector, NSBIndicate that CSI is anti- The subband number of feedback.
Parameter beta is and KNZAnd the relevant parameter of 2LM；Wherein, 2LM indicates bit diagram size, KNZIndicate the sky for needing to feed back The number of the weighting coefficient of domain base vector and frequency domain base vector.
The parameter R is and N3And NSBRelevant parameter；Wherein, N3Indicate the number of frequency domain unit, NSBIndicate CSI feedback Subband number.
In one embodiment, the parameter limitation module 410 is used for:
The choosing of CSI-RS port number, number of plies N, parameter p, parameter beta or parameter R are limited according to the number of the airspace base vector It selects；Or；
The selection of number of plies N and CSI-RS port number is limited according to the number of the airspace base vector；Alternatively,
Number of plies N, CSI-RS port number and the selection of parameter p are limited according to the number of the airspace base vector；Alternatively,
The selection of number of plies N, CSI-RS port number and parameter beta is limited according to the number of the airspace base vector；Alternatively,
The selection of number of plies N, CSI-RS port number, parameter p and parameter beta is limited according to the number of the airspace base vector；Or Person,
CSI-RS port number is limited according to the number of the airspace base vector and using the selection of the number of plies.
In one embodiment, the number of the airspace base vector is 6.
In one embodiment, the measurement module 420 includes:
It determines submodule 421, for compressing the parameter of code book according to the second class frequency domain, determines and measure the CSI report The channel state information processing unit CPU occupied when announcement；
Submodule 422 is measured, for measuring the CSI report using the CPU of the occupancy.
In one embodiment, the determining submodule 421 is used for:
The parameter that code book is compressed according to the second class frequency domain determines that the same time occupies the quantity and occupancy one of CPU At least one of in the time of CPU.
The embodiment of the present application also proposes the device of determining CPU a kind of, if Fig. 5 is the apparatus structure schematic diagram, including quantity At least one of in determining module 510 and time determining module 520；
The quantity determining module 510 determines that the same time occupies for compressing the parameter of code book according to the second class frequency domain The quantity of CPU；
The time determining module 520 determines for compressing the parameter of code book according to the second class frequency domain and occupies a CPU Time.
In one embodiment, the parameter includes: the number of airspace base vector, CSI-RS port number, maximum feedback Number of plies Nmax, parameter p, in parameter beta and parameter R at least one of.
Wherein, parameter p is and M and NSBRelevant parameter；Wherein, M indicates the number of frequency domain base vector, NSBIndicate that CSI is anti- The subband number of feedback.
Parameter beta is and KNZAnd the relevant parameter of 2LM；Wherein, 2LM indicates bit diagram size, KNZIndicate the sky for needing to feed back The number of the weighting coefficient of domain base vector and frequency domain base vector.
Parameter R is and N3And NSBRelevant parameter；Wherein, N3Indicate the number of frequency domain unit, NSBIndicate the son of CSI feedback Band number.
In one embodiment, the quantity determining module 510 is used for:
According to the number of airspace base vector, parameter R and NmaxIn any one or two determinations same time occupy CPU Quantity；Alternatively,
According to the number of airspace base vector, parameter R and NmaxDetermine that the same time occupies the quantity of CPU.
In one embodiment, the time determining module 520 is used for:
Determine that parameter Z and parameter Z', the parameter Z and parameter Z' are used according to the parameter that the second class frequency domain compresses code book In the time for determining one CPU of occupancy；The parameter Z is indicated from first symbol after the channel for dispatching the CSI report Time interval between first symbol for reporting the CSI report；The parameter Z' is indicated from for measuring the CSI report The last symbol of the reference signal of announcement is to the time interval between first symbol for reporting the CSI report.
In one embodiment, the time determining module 520 is used for:
The maximum value within the scope of parameter value is configured by the parameters of the second class frequency domain compression code book；
The parameter Z and parameter Z' is determined according to the parameter with the second class frequency domain compression code book postponed.
In one embodiment, the time determining module 520 is used for:
By CSI-RS port number, the N of the second class frequency domain compression code bookmax, airspace base vector number or parameter R match The different value being set within the scope of parameter value, remaining parameter configuration by the second class frequency domain compression code book is within the scope of parameter value Maximum value；The difference of the parameter Z and parameter Z' are determined according to the parameter with the second class frequency domain postponed compression code book Value；Alternatively,
By the CSI-RS port number and N of the second class frequency domain compression code bookmaxThe difference being configured within the scope of parameter value Value, remaining parameter configuration by the second class frequency domain compression code book is the maximum value within the scope of parameter value, according to described with postponing The parameter of the second class frequency domain compression code book determine the different value of the parameter Z and parameter Z'；Alternatively,
Parameter is configured by the number of the CSI-RS port number of the second class frequency domain compression code book and airspace base vector to take The different value being worth in range, remaining parameter configuration by the second class frequency domain compression code book are the maximum value within the scope of parameter value, The different value of the parameter Z and parameter Z' are determined according to the parameter with the second class frequency domain postponed compression code book；Alternatively,
It configures the CSI-RS port number of the second class frequency domain compression code book and parameter R within the scope of parameter value not With value, remaining parameter configuration by the second class frequency domain compression code book is the maximum value within the scope of parameter value, according to the configuration The parameter of the second class frequency domain compression code book afterwards determines the different value of the parameter Z and parameter Z'；Alternatively,
It configures the number of the airspace base vector of the second class frequency domain compression code book and parameter R within the scope of parameter value Different value, by the second class frequency domain compression code book remaining parameter configuration be parameter value within the scope of maximum value, according to described Parameter with the second class frequency domain compression code book postponed determines the different value of the parameter Z and parameter Z'；Alternatively,
By CSI-RS port number, the N of the second class frequency domain compression code bookmaxAnd the number of airspace base vector is configured to join Different value in number value range, remaining parameter configuration by the second class frequency domain compression code book are the maximum within the scope of parameter value Value determines the different value of the parameter Z and parameter Z' according to the parameter with the second class frequency domain postponed compression code book；Or Person,
By CSI-RS port number, the N of the second class frequency domain compression code bookmaxAnd parameter R is configured within the scope of parameter value Different value, by the second class frequency domain compression code book remaining parameter configuration be parameter value within the scope of maximum value, according to described Parameter with the second class frequency domain compression code book postponed determines the different value of the parameter Z and parameter Z'.
In one embodiment, the time determining module 520 is used for:
The practical value of the parameter of code book is compressed according to the second class frequency domain, determines the reality for measuring the CSI report Complexity；And according to the maximum value in the value range of the parameter of the second class frequency domain compression code book, determines and measure the CSI The maximum complexity of report；
The parameter Z and parameter Z' is determined according to the actual complex degree and the maximum complexity.
The function of each module in the embodiment of the present application device may refer to the corresponding description in the above method, herein no longer It repeats.
Fig. 6 is the embodiment of the present application for CSI feedback or the terminal device structural schematic diagram of determining CPU, such as Fig. 6 institute Show, terminal device provided by the embodiments of the present application includes: memory 603 and processor 604.The terminal device can also include Interface 601 and bus 602.The interface 601, memory 603 are connected with processor 604 by bus 602.The memory 603 for storing instruction.The processor 604 is configured as reading described instruction to execute above-mentioned CSI feedback or determine CPU's The technical solution of embodiment of the method, it is similar that the realization principle and technical effect are similar, and details are not described herein again.
The application provides a kind of storage medium, and the storage medium is stored with computer program, the computer program quilt Processor realizes the method in above-described embodiment when executing.
The above, the only exemplary embodiment of the application, are not intended to limit the protection scope of the application.
It should be understood by those skilled in the art that, term terminal device covers the wireless user equipment of any suitable type, Such as mobile phone, portable data processing device, portable web browser or vehicle-mounted mobile platform.
In general, the various embodiments of the application can be in hardware or special circuit, software, logic or any combination thereof Middle realization.For example, some aspects can be implemented within hardware, and can be implemented in can be by controller, micro- for other aspects In the firmware or software that processor or other computing devices execute, although the application is without being limited thereto.
Embodiments herein can execute computer program instructions by the data processor of mobile device and realize, example Such as in processor entity, perhaps pass through hardware or the combination by software and hardware.Computer program instructions can be remittance Compile instruction, instruction set architecture (ISA) instruction, machine instruction, machine-dependent instructions, microcode, firmware instructions, state setting number According to or with one or more programming languages any combination source code or object code write.
The block diagram of any logic flow in illustrations can be with representation program step, or can indicate to be connected with each other Logic circuit, module and function, or can be with the combination of representation program step and logic circuit, module and function.Computer Program can store on a memory.Memory can have any type for being suitable for local technical environment and can be used Any suitable data storage technology is realized.Memory in the embodiment of the present application can be volatile memory or non-volatile Memory, or may include both volatile and non-volatile memories.Wherein, nonvolatile memory can be read-only memory (Read-Only Memory, ROM), programmable read only memory (Programmable ROM, PROM), erasable programmable are only Read memory (Erasable PROM, EPROM), electrically erasable programmable read-only memory (Electrically EPROM, ) or flash memory etc. EEPROM.Volatile memory can be random access memory (Random Access Memory, RAM), As External Cache.RAM may include diversified forms, such as static random access memory (Static RAM, SRAM), Dynamic random access memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), double data speed synchronous dynamic RAM (Double Data Rate SDRAM, DDR SDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), synchronized links dynamic random access memory Device (Synchlink DRAM, SLDRAM) and direct rambus random access memory (Direct Rambus RAM, DR RAM).The memory of system and method described herein includes but is not limited to the storage of these and any other suitable type Device.
The processor of the embodiment of the present application can be any type for being suitable for local technical environment, such as, but not limited to logical With computer, special purpose computer, microprocessor, digital signal processor (Digital Signal Processor, DSP), specially With integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable logic device (Field-Programmable Gate Array, FGPA) either other programmable logic device, discrete gate or transistor Logical device, discrete hardware components or the processor based on multi-core processor framework.General processor can be microprocessor Or it is also possible to any conventional processor etc..Above-mentioned processor may be implemented or execute the public affairs in the embodiment of the present application The step of each method opened.Software module can be located at random access memory, flash memory, read-only memory, programmable read only memory Or in the storage medium of this fields such as electrically erasable programmable memory, register maturation.The storage medium is located at memory, The step of processor reads the information in memory, completes the above method in conjunction with its hardware.
By exemplary and unrestricted example, retouching in detail to the example embodiment of the application has had been provided above It states.But consider in conjunction with drawings and claims, a variety of modifications and adjustment to above embodiments carry out those skilled in the art Say it is it will be apparent that but without departing from the scope of the present invention.Therefore, appropriate range of the invention will be determined according to claim.

Claims (17)

1. a kind of CSI back method characterized by comprising
The number of the airspace base vector of code book is compressed according to the second class frequency domain, limitation the second class frequency domain compression code book removes the sky The selection of other parameters except the number of domain base vector；
CSI report using reference signal measurement comprising the second class frequency domain compression code book.
2. the method according to claim 1, wherein the other parameters include: channel state information with reference to letter Number CSI-RS port number, number of plies N, parameter p, parameter beta, parameter R and using in the number of plies of the number of the airspace base vector extremely One item missing；
The parameter p is parameter relevant to the subband number of the number of frequency domain base vector and the CSI feedback；
The parameter beta is and KNZAnd the relevant parameter of bit diagram size；The KNZFor the airspace base vector and frequency domain for needing to feed back The number of the weighting coefficient of base vector；
The parameter R is parameter relevant to the subband number of the number of frequency domain unit and CSI feedback.
3. method according to claim 1 or 2, which is characterized in that compress the airspace basic vector of code book according to the second class frequency domain The number of amount limits the selection of the other parameters, comprising:
The selection of CSI-RS port number, number of plies N, parameter p, parameter beta or parameter R are limited according to the number of the airspace base vector； Or；
The selection of number of plies N and CSI-RS port number is limited according to the number of the airspace base vector；Alternatively,
Number of plies N, CSI-RS port number and the selection of parameter p are limited according to the number of the airspace base vector；Alternatively,
The selection of number of plies N, CSI-RS port number and parameter beta is limited according to the number of the airspace base vector；Alternatively,
The selection of number of plies N, CSI-RS port number, parameter p and parameter beta is limited according to the number of the airspace base vector；Alternatively,
The selection of CSI-RS port number is limited according to the number of the airspace base vector and using the number of the airspace base vector The number of plies.
4. method according to claim 1 or 2, which is characterized in that the number of the airspace base vector is 6.
5. method according to claim 1 or 2, which is characterized in that described to include described second using reference signal measurement The CSI report of class frequency domain compression code book, comprising:
The parameter of code book is compressed according to the second class frequency domain, determines the channel state information occupied when measuring the CSI report Processing unit CPU；
The CSI report is measured using the CPU of the occupancy.
6. according to the method described in claim 5, it is characterized in that, the ginseng for compressing code book according to the second class frequency domain Number determines the CPU occupied when measuring the CSI report, comprising:
The parameter that code book is compressed according to the second class frequency domain determines that the same time occupies the quantity of CPU and occupies a CPU's At least one of in time.
7. a kind of method of determining channel state information processing unit CPU characterized by comprising
The parameter that code book is compressed according to the second class frequency domain determines that the same time occupies the quantity of CPU and occupies the time of a CPU At least one of in.
8. the method according to the description of claim 7 is characterized in that the parameter includes: the number of airspace base vector, channel shape State information reference signal CSI-RS port number, maximum feedback number of plies Nmax, parameter p, in parameter beta and parameter R at least one of；
The parameter p is parameter relevant to the subband number of the number of frequency domain base vector and the CSI feedback；
The parameter beta is and KNZAnd the relevant parameter of bit diagram size；The KNZFor the airspace base vector and frequency domain for needing to feed back The number of the weighting coefficient of base vector；
The parameter R is parameter relevant to the subband number of the number of frequency domain unit and CSI feedback.
9. method according to claim 7 or 8, which is characterized in that the parameter of code book is compressed according to the second class frequency domain, Determine that the same time occupies the quantity of CPU, comprising:
According to the number of airspace base vector, parameter R and NmaxIn any one or two determinations same time occupy the number of CPU Amount；Alternatively,
According to the number of the airspace base vector, parameter R and NmaxDetermine that the same time occupies the quantity of CPU.
10. according to right want 7 or 8 described in method, which is characterized in that according to the second class frequency domain compress code book parameter, Determine the time for occupying a CPU, comprising:
Determine parameter Z and parameter Z', the parameter Z and parameter Z' for true according to the parameter that the second class frequency domain compresses code book Surely the time of a CPU is occupied；The parameter Z is indicated from first symbol after the channel for dispatching the CSI report to upper Report the time interval between first symbol of the CSI report；The parameter Z' is indicated from for measuring the CSI report The last symbol of reference signal is to the time interval between first symbol for reporting the CSI report.
11. according to the method described in claim 10, it is characterized in that, the ginseng for compressing code book according to the second class frequency domain Number determines parameter Z and parameter Z', comprising:
The maximum value within the scope of parameter value is configured by the parameters of the second class frequency domain compression code book；
The parameter Z and parameter Z' is determined according to the parameter with the second class frequency domain compression code book postponed.
12. according to the method described in claim 10, it is characterized in that, the basis matches the second class frequency domain compression code book postponed Parameter determine the parameter Z and parameter Z', comprising:
By CSI-RS port number, the N of the second class frequency domain compression code bookmax, airspace base vector number or parameter R be configured to Different value within the scope of parameter value, by the second class frequency domain compression code book remaining parameter configuration be parameter value within the scope of most Big value；The different value of the parameter Z and parameter Z' are determined according to the parameter with the second class frequency domain postponed compression code book；Or Person,
By the CSI-RS port number and N of the second class frequency domain compression code bookmaxThe different value being configured within the scope of parameter value, Remaining parameter configuration by the second class frequency domain compression code book is the maximum value within the scope of parameter value, according to described with postpone the The parameter of two class frequency domains compression code book determines the different value of the parameter Z and parameter Z'；Alternatively,
Parameter value model is configured by the number of the CSI-RS port number of the second class frequency domain compression code book and airspace base vector Interior different value is enclosed, remaining parameter configuration by the second class frequency domain compression code book is the maximum value within the scope of parameter value, according to The parameter with the second class frequency domain postponed compression code book determines the different value of the parameter Z and parameter Z'；Alternatively,
The difference within the scope of parameter value is configured by the CSI-RS port number of the second class frequency domain compression code book and parameter R Value, remaining parameter configuration by the second class frequency domain compression code book is the maximum value within the scope of parameter value, according to described with postponing The parameter of the second class frequency domain compression code book determine the different value of the parameter Z and parameter Z'；Alternatively,
It configures the number of the airspace base vector of the second class frequency domain compression code book and parameter R within the scope of parameter value not With value, remaining parameter configuration by the second class frequency domain compression code book is the maximum value within the scope of parameter value, according to the configuration The parameter of the second class frequency domain compression code book afterwards determines the different value of the parameter Z and parameter Z'；Alternatively,
By CSI-RS port number, the N of the second class frequency domain compression code bookmaxAnd the number of airspace base vector is configured to parameter and takes The different value being worth in range, remaining parameter configuration by the second class frequency domain compression code book are the maximum value within the scope of parameter value, The different value of the parameter Z and parameter Z' are determined according to the parameter with the second class frequency domain postponed compression code book；Alternatively,
By CSI-RS port number, the N of the second class frequency domain compression code bookmaxAnd parameter R is configured within the scope of parameter value not With value, remaining parameter configuration by the second class frequency domain compression code book is the maximum value within the scope of parameter value, according to the configuration The parameter of the second class frequency domain compression code book afterwards determines the different value of the parameter Z and parameter Z'.
13. according to the method described in claim 10, it is characterized in that, the basis matches the second class frequency domain compression code book postponed Parameter determine the parameter Z and parameter Z', comprising:
The practical value of the parameter of code book is compressed according to the second class frequency domain, determines the actual complex for measuring the CSI report Degree；And according to the maximum value in the value range of the parameter of the second class frequency domain compression code book, determines and measure the CSI report Maximum complexity；
The parameter Z and parameter Z' is determined according to the actual complex degree and the maximum complexity.
14. a kind of CSI back device characterized by comprising
Parameter limits module, and the number of the airspace base vector for compressing code book according to the second class frequency domain limits the second class frequency domain Compress the selection of the other parameters in addition to the number of the airspace base vector of code book；
Measurement module, for the CSI report using reference signal measurement comprising the second class frequency domain compression code book.
15. a kind of device of determining channel state information processing unit CPU, which is characterized in that timely including quantity determining module Between in determining module at least one of；
The quantity determining module determines that the same time occupies the number of CPU for compressing the parameter of code book according to the second class frequency domain Amount；
The time determining module determines the time for occupying a CPU for compressing the parameter of code book according to the second class frequency domain.
16. a kind of terminal device for CSI back, which is characterized in that the terminal device includes: processing Device and memory；
The memory is for storing instruction；
The processor is configured to reading described instruction to execute the method as described in any in claim 1 to 6.
17. a kind of for determining the terminal device of channel state information processing unit CPU, which is characterized in that the terminal device It include: processor and memory；
The memory is for storing instruction；
The processor is configured to reading described instruction to execute the method as described in any in claim 7 to 13.
CN201910245174.7A 2019-03-28 2019-03-28 Channel state information feedback method, device and terminal device Pending CN110535514A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021128885A1 (en) * 2019-12-27 2021-07-01 北京紫光展锐通信技术有限公司 Channel state information processing method, and device
CN113517967A (en) * 2020-04-11 2021-10-19 维沃移动通信有限公司 Method for determining Channel State Information (CSI) report and communication equipment
WO2023236535A1 (en) * 2022-06-10 2023-12-14 中兴通讯股份有限公司 Beamforming method and apparatus for channel state information-reference signal (csi-rs), and storage medium

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021128885A1 (en) * 2019-12-27 2021-07-01 北京紫光展锐通信技术有限公司 Channel state information processing method, and device
CN113517967A (en) * 2020-04-11 2021-10-19 维沃移动通信有限公司 Method for determining Channel State Information (CSI) report and communication equipment
CN113517967B (en) * 2020-04-11 2022-09-09 维沃移动通信有限公司 Method for determining Channel State Information (CSI) report and communication equipment
WO2023236535A1 (en) * 2022-06-10 2023-12-14 中兴通讯股份有限公司 Beamforming method and apparatus for channel state information-reference signal (csi-rs), and storage medium

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