CN107689822A - Feedback method and device - Google Patents
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- CN107689822A CN107689822A CN201610640184.7A CN201610640184A CN107689822A CN 107689822 A CN107689822 A CN 107689822A CN 201610640184 A CN201610640184 A CN 201610640184A CN 107689822 A CN107689822 A CN 107689822A
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- 230000000737 periodic effect Effects 0.000 description 19
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- 101000577065 Arabidopsis thaliana Mannose-6-phosphate isomerase 2 Proteins 0.000 description 7
- QLBALZYOTXGTDQ-VFFCLECNSA-N PGI2-EA Chemical compound O1\C(=C/CCCC(=O)NCCO)C[C@@H]2[C@@H](/C=C/[C@@H](O)CCCCC)[C@H](O)C[C@@H]21 QLBALZYOTXGTDQ-VFFCLECNSA-N 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 5
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- ZYHQYSIVGCZMNM-UHFFFAOYSA-N 4-(2-hydroxyethylsulfonyloxy)butyl 2-hydroxyethanesulfonate Chemical compound OCCS(=O)(=O)OCCCCOS(=O)(=O)CCO ZYHQYSIVGCZMNM-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
-
- 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]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention discloses feedback method and device, this method includes：The first CSI RS to be feedback and the 2nd CSI RS to be feedback are obtained, wherein, the first CSI RS and the 2nd CSI RS comprise at least PMI respectively；Different feedback positions is configured for the first CSI RS and the 2nd CSI RS；Feed back the first CSI RS and the 2nd CSI RS.Solve the problems, such as that agreement can not be supported to report two PMI in correlation technique by the present invention, realize reporting for two PMI.
Description
Technical field
The present invention relates to the communications field, in particular to feedback method and device.
Background technology
R13 introduces two kinds of CSI-RS (Channel State Information-Reference Signal, letter
Channel state information reference signal), one kind is non-precoded CSI-RS (Class type-As), real by the broad beam of same widths
Now full MPS process；Another kind is for beam forming CSI-RS (BF CSI-RS) using the mode of beam forming by multiple antenna arrays
Member is mapped in a CSI-RS port, forms the wave beam with certain orientation, can only coverage cell inside points region (Class
B types).
Beam forming CSI-RS has two kinds of implementations, and mode one includes for a CSI process is more than a CSI-
RS resources (K>1), ordinary circumstance be hair K broad beam, CSI feedback comprising CRI (CSI-RS Resource Indicator,
CSI-RS indicates)+PMI (Precoding Matrix Indicator, pre-coding matrix instruction)+CQI (Channel
Quality Indicator, channel quality instruction)+RI (Rank Indication, order instruction).UE measures multiple wave beam sides
To therefrom one optimum beam of selection, reports an optimal resource number CRI.But it is also likely to be multiple narrow beams.
Mode two is to include a CSI-RS (K=1) in a CSI process, is generally now one
Individual CSI-RS includes multiple narrow beams, also referred to as UE-specific BF CSI-RS.When high level is configured with parameter
When " alternativeCodebookEnabledCLASSB_K1=TRUE ", CSI feedback includes PMI+CQI+RI.But also have
It is probably a broad beam, CSI feedback includes CQI+RI+PMI and (includes long code phase when the 4 port code books enhancing of 8 ports or use
This index i1With short-term code book index i2；Other situations are an index)
Periodicity CSI feedback on PUCCH can be divided into two types, and first kind feedback is mainly characterized by only broadband
The feedback of CQI information, commonly known as broadband CQI feedback；Being mainly characterized by for second class feedback has broadband CQI information
Feedback, also there is the feedback of sub-band CQI information, and take different subframes, commonly known as subband CQI feedback.
Class A CSI-RS CSI is reported, and according to broadband CQI feedback, is included with form PUCCH 1-1 in three parts
Report, one reports for RI；Two is report after CQI and PMI2 (short-term code book index) combined coding, three be carrying PMI1 (i1,1 He
I1, the long-term code book index of the 2, first dimension and the second long-term code book index of dimension).Broadband CQI feedback includes following four cycle parameter：
NpdRepresent the feedback cycle of broadband CQI information；NOFFSET,CQIRepresent that time of the CQI information feedback moment in a cycle is inclined
Put；The broadband CQI feedback moment is the subframe for meeting following formula.
MRIThe feedback cycle for representing RI information is the M in broadband CQI feedback cycleRITimes；NOFFSET,RIRepresent RI feedback of the information
Moment feeds back the time offset at moment relative to broadband CQI information.The RI feedback moment is the subframe for meeting following formula
The cycle and sub-frame offset that RI is reported are by high-rise configuration parameter IRI, thus obtain MRIAnd NOFFSET,RI。
PMI1 feedback cycles meet following formula, and wherein H ' is high-rise configuration parameter.
Class ACSI-RS CSI is reported, according to narrowband CQI feedback, using form PUCCH 2-1, according to PTI values
(desirable 0/1) is different, and reporting comprising different content.As shown in Fig. 2 as PTI=0, one is RI and PTI (Precoding
Type indication, precoding type instruction) combined coding reports；Two be broadband CQI and broadband PMI2 (short-term code book ropes
Draw) combined coding after report, three reporting for arrowband PMI2 (short-term code book index).As shown in figure 1, as PTI=1, one
Reported for RI and PTI (Precoding type indication, precoding type instruction) combined coding；Two be broadband CQI and
Reported after broadband PMI2 (short-term code book index) combined coding, three be broadband PMI1 (i1,1 and i1, the 2, first long-term code book of dimension
Index and the second long-term code book index of dimension) report.
Class B K=1CSI-RS cycle CSI is reported, when high level is configured with parameter
When " alternativeCodebookEnabledCLASSB_K1=TRUE ", during if broadband CQI feedback, using form PUCCH
1-1, reported comprising two parts, one reports for RI；Two be to report combining for CQI and PMI.If narrowband CQI feedback, using form
PUCCH 2-1, are reported comprising three parts, and one reports for the RI of type 3, and two to be that PMI is only carried out with broadband CQI anti-after combined coding
Feedback, feedback bits are as shown in the table；Three be that arrowband CQI is reported；
Class B K>1CSI-RS cycle CSI is reported, during if broadband CQI feedback, using form PUCCH 1-1, bag
Reported containing two kinds of submode.Submode 1 includes two parts：One is that RI and CRI combines and reported；Two be CQI and PMI1 is (long-term
Code book index) report combining for PMI2 (short-term code book index).Submode 2 includes two parts：One is CRI, RI and PMI1
Combined coding, two be PMI2.If narrowband CQI feedback, using form PUCCH 2-1, except being carried out in CRI feedback subframes with RI
Outside combined coding reports, other parts are identical with Class A.
When PUSCH carries aperiodic CSI feedback, if be configured with PMI/RI, Modes 1-2,2-2,3-1,3-2 can be used,
1-1.Aperiodicity RI, CQI and PMI information feedback can be divided into three types, and being mainly characterized by for first kind feedback is only wide
Feedback (Mode 1-2,1-1) with CQI information, commonly known as broadband CQI feedback；Second class feedback is mainly characterized by
There is the feedback of broadband CQI information, also there is the feedback that UE selects optimal sub-band CQI information, the son of commonly known as UE selections
Band CQI feedback (Mode2-2)；3rd class feedback is mainly characterized by the feedback for having broadband CQI information, also there is different sub-band
The feedback of CQI information, the subband CQI feedback (Mode 3-1,3-2) of commonly known as high-rise configuration.And RI feedback position exists
At the symbol of left and right second of PUSCH DMRS symbols.CQI, PMI are placed on the position that PUSCH frequencies start, and are distributed in PUSCH
Removed in subframe on all symbols outside DMRS.
Mode two can reduce CSI-RS port numbers, and improve covering, reduce the complexity of measurement.TDD can utilize letter
CSI-RS beam directions are calculated and determined in road reciprocity；If FDD has up-downgoing statistics reciprocity, the above method can also be used；
Otherwise resource utilization is relatively low in mode two, after channel condition changes, if narrow beam direction can not adjust in time, and meeting
UE receptivities are influenceed, and then reduce throughput of system.At present in R14FDMIMO problems, propose that a kind of utilize mixes CSI-RS
The method that CSI is reported is carried out, i.e., sends out different beams using the CSI-RS of two different types or same type, different CSI-RS,
Using a variety of beam combinations, UE can carry out a variety of CSI and report, and more or more fully channel condition information is provided for eNB, with
Improve BF CSI-RS efficiency.
As included at least two CSI-RS in a CSI process, second CSI-RS CSI feedback includes whole
Feedback content, and first CSI-RS CSI feedback only reports content comprising part CSI, aids in adjusting and determining second
CSI-RS.Be divided into following several situations, thereby increases and it is possible to CSI feedback content：
First eMIMO-type CSI-RS is CLASS A CSI-RS.Second is CLASS B and K=
1CSI-RS, CSI is reported to include CQI+PMI+RI
First CSI-RS reports CSI to include long-term code book index PMI1 (i1,1 and i1, the 2, first long-term code book index of dimension
With the second long-term code book index of dimension)+RI；Or report CSI only to include PMI1, it can directly use Class A CSI feedback form
And type
First eMIMO-type CSI-RS is CLASS B and K=1CSI-RS second is CLASS B and K=
1CSI-RS, CSI is reported to include CQI+PMI+RI, now PMI can be to be configured with
The pre-coding matrix instruction of code book used when " alternativeCodebookEnabledCLASSB_K1=TRUE ".
First CSI-RS reports CSI to include CQI+RI+PMI1 (long-term code book index)；Or CQI+RI+PMI (put by assignment
The pre-coding matrix instruction of code book used when " alternativeCodebookEnabledCLASSB_K1=TRUE ")；Or
PMI1；Class A CSI feedback form and type can directly be used；Or PMI (refers to and is configured with
The pre-coding matrix instruction of code book used when " alternativeCodebookEnabledCLASSB_K1=TRUE ").
First eMIMO-type CSI-RS is CLASS B and K>1CSI-RS.Second is CLASS B and K=
1CSI-RS, CSI is reported to include CQI+PMI+RI.
First CSI-RS CSI is reported as CRI；Or CSI is reported as the PMI+RI of each resource；Or CSI is reported
For CRI+CQI+PMI+RI.First eMIMO-type CSI-RS is CLASS B and K=1CSI-RS.Second is
CLASS B and K>1CSI-RS, CSI are reported as CRI+CQI+PMI+RI.
First CSI-RS CSI is reported as PMI1 (long-term code book index).
First eMIMO-type CSI-RS is CLASS A CSI-RS, and second is CLASS B and K>1CSI-
RS, CSI are reported as CRI+CQI+PMI+RI.
First CSI-RS CSI is reported as PMI1 (long-term code book index).
Understand can exist in a CSI process and include at least two CSI-RS, second CSI-RS CSI feedback
The feedback content of whole is included, and first CSI-RS CSI feedback only reports content comprising part CSI, can there is first
CSI-RS CSI reports PMI and second CSI-RS CSI also to report PMI situation.Now agreement can not support this match somebody with somebody
Put.
The content of the invention
The invention provides feedback method and device, can not support to report two at least to solve agreement in correlation technique
The problem of PMI.
According to an aspect of the invention, there is provided a kind of feedback method, including：Obtain the first CSI-RS to be feedback and
2nd CSI-RS to be feedback, wherein, the first CSI-RS and the 2nd CSI-RS comprise at least PMI respectively；To be described
First CSI-RS and the 2nd CSI-RS configures different feedback positions；Feed back the first CSI-RS and the 2nd CSI-
RS。
Further, configuring different feedback positions for the first CSI-RS and the 2nd CSI-RS includes：For institute
The feedback cycle for stating the first CSI-RS configurations is M times of the feedback cycle for the 2nd CSI-RS configurations, also, described in configuration
First CSI-RS relative to the bigoted N number of subframes of the 2nd CSI-RS, wherein, the M and N are integer.
Further, in the case of the N=0, the CQI+PMI or PMI of the first CSI-RS feedback moment are
The integral multiple at the CQI and PMI combined codings feedback moment of the 2nd CSI-RS.
Further, the CQI+PMI of the first CSI-RS is combined coding.
Further, the CSI+PM of CQI+PMI or described 2nd of the first CSI-RS combined coding includes：Order=
In the case of 1, the order after coding is followed successively by CQI, PMI；In the case of order=2, the order after coding is followed successively by CQI, sky
Divide CQI, PMI；In the case where order is equal to other values, the order after coding is followed successively by broadband CQI, space division CQI, broadband PMI.
Further, according to the instruction of configured information, it is determined that only feed back the 2nd CSI-RS, or, feedback described the
One CSI-RS and the 2nd CSI-RS.
Further, the configured information is PTI.
Further, feeding back the 2nd CSI-RS and the first CSI-RS includes：It it is second by feedback kind
Fed back after eMIMO-type class B K=1CSI-RS broadband CQI and broadband PMI combined coding, another is fed back
Type is fed back after the broadband CQI and broadband PMI1 combined codings for first eMIMO-type class B K=1CSI-RS.
Further, in addition to：In the case where the first CSI-RI includes two resources, according to the mark of the resource
The PMI corresponding to the resource that is linked in sequence known, and fed back at the time of high level configures.
Further, feeding back the 2nd CSI-RS and the first CSI-RS includes at least one of：Anti- without CRI
Feedback, in the subframe of only RI feedbacks, by the long-term code book index of the first CSI-RS be placed in the 2nd CSI-RS order instruction with
After long-term code book index joint instructions；Or, the rank indication information of the first CSI-RS is placed in second CSI-RS
Order instruction and long-term code book index joint instructions before；In the subframe that CRI and RI feeds back, by the length of the first CSI-RS
Phase code book index is placed in after the CRI of the 2nd CSI-RS, order instruction and long-term code book index joint instructions；Or, by described in
First CSI-RS rank indication information be placed in the CRI of the 2nd CSI-RS, order instruction and long-term code book index joint instructions it
Before；Fed back without CRI, in the subframe of only RI feedbacks, the long-term code book index of the first CSI-RS is placed in described second
After CSI-RS order instruction；Or, the rank indication information of the first CSI-RS is placed in the order instruction of the 2nd CSI-RS
Before；In the subframe that CRI and RI feeds back, the long-term code book index of the first CSI-RS is placed in the 2nd CSI-RS's
After CRI, order instruction joint instructions, or, the rank indication information of the first CSI-RS is placed in the 2nd CSI-RS's
Before CRI, order instruction joint instructions.
According to another aspect of the present invention, a kind of feedback device is additionally provided, including：Acquisition module, treated for obtaining
The first CSI-RS and the 2nd CSI-RS to be feedback of feedback, wherein, the first CSI-RS and the 2nd CSI-RS difference
Including at least PMI；Configuration module, for configuring different feedback positions for the first CSI-RS and the 2nd CSI-RS；
Feedback module, for feeding back the first CSI-RS and the 2nd CSI-RS.
At least solve the problems, such as that agreement can not be supported to report two PMI in correlation technique, support two by the present invention
The problem of PMI is reported.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram one that CSI is reported using form PUCCH 2-1 according to prior art of the present invention；
Fig. 2 is the schematic diagram two that CSI is reported using form PUCCH 2-1 according to prior art of the present invention；
Fig. 3 is the flow chart of the collocation method of demodulated reference signal according to embodiments of the present invention；
Fig. 4 is the structured flowchart of the configuration device of demodulated reference signal according to embodiments of the present invention；
Fig. 5 is feedback CSI-RS according to embodiments of the present invention schematic diagram one；
Fig. 6 is feedback CSI-RS according to embodiments of the present invention schematic diagram two；
Fig. 7 is feedback CSI-RS according to embodiments of the present invention schematic diagram three；
Fig. 8 is feedback CSI-RS according to embodiments of the present invention schematic diagram four.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
A kind of feedback method is provided in the present embodiment, and Fig. 3 is the flow of feedback method according to embodiments of the present invention
Figure, as shown in figure 3, the flow comprises the following steps：
Step S302, obtain the first CSI-RS to be feedback and the 2nd CSI-RS to be feedback, wherein, the first CSI-RS and
2nd CSI-RS comprises at least PMI respectively；
Step S304, it is that the first CSI-RS and the 2nd CSI-RS configures different feedback positions；
Step S306, feed back the first CSI-RS and the 2nd CSI-RS.
Solve the problems, such as that agreement can not be supported to report two PMI in correlation technique, support two PMI by above-mentioned steps
The problem of reporting.
It is that the first CSI-RS and the 2nd CSI-RS configures different feedback position bags in an optional embodiment
Include：Feedback cycle for the first CSI-RS configurations is M times of the feedback cycle for the 2nd CSI-RS configurations, also, configures first
CSI-RS relative to the bigoted N number of subframes of the 2nd CSI-RS, wherein, M and N are integer.
In an optional embodiment, in the case of N=0, the first CSI-RS CQI+PMI or PMI feedback
Moment is that the 2nd CSI-RS CQI and PMI combined codings feed back the integral multiple at moment.
In an optional embodiment, the first CSI-RS CQI+PMI is combined coding.
In an optional embodiment, the first CSI-RS CQI+PMI or the 2nd CSI+PM combined coding include：
In the case of order=1, the order after coding is followed successively by CQI, PMI；In the case of order=2, the order after coding is followed successively by
CQI, space division CQI, PMI；In the case where order is equal to other values, the order after coding is followed successively by broadband CQI, space division CQI, broadband
PMI。
In an optional embodiment, according to the instruction of configured information, it is determined that the 2nd CSI-RS is only fed back, or,
Feed back the first CSI-RS and the 2nd CSI-RS.
In an optional embodiment, configured information PTI.
In an optional embodiment, feedback the 2nd CSI-RS and the first CSI-RS includes：It is the by feedback kind
Fed back after two eMIMO-type class B K=1CSI-RS broadband CQI and broadband PMI combined coding, by another
It is anti-after broadband CQI and broadband PMI1 combined codings that feedback kind is first eMIMO-type class B K=1CSI-RS
Feedback.
In an optional embodiment, in addition to：In the case where the first CSI-RI includes two resources, according to money
The PMI corresponding to resource that is linked in sequence of the mark in source, and fed back at the time of high level configures.
In an optional embodiment, feedback the 2nd CSI-RS and the first CSI-RS includes at least one of：
Fed back without CRI, in the subframe of only RI feedbacks, the first CSI-RS long-term code book index is placed in the 2nd CSI-RS order instruction
After long-term code book index joint instructions；Or, the first CSI-RS rank indication information is placed in second CSI-RS order and referred to
Show with before long-term code book index joint instructions；In the subframe that CRI and RI feeds back, by the first CSI-RS long-term code book index
It is placed in after the 2nd CSI-RS CRI, order instruction and long-term code book index joint instructions；Or, the order instruction by the first CSI-RS
Information is placed in before the 2nd CSI-RS CRI, order instruction and long-term code book index joint instructions；Fed back without CRI, only RI is anti-
In the subframe of feedback, the first CSI-RS long-term code book index is placed in after the 2nd CSI-RS order instruction；Or, by the first CSI-
RS rank indication information is placed in before the 2nd CSI-RS order instruction；In the subframe that CRI and RI feeds back, by the first CSI-RS's
Long-term code book index is placed in after the 2nd CSI-RS CRI, order instruction joint instructions, or, the first CSI-RS order instruction is believed
Breath is placed in before the 2nd CSI-RS CRI, order instruction joint instructions.
A kind of feedback device is additionally provided in the present embodiment, and Fig. 4 is the knot of feedback device according to embodiments of the present invention
Structure block diagram, as shown in figure 4, the structure includes：
Acquisition module 42, for obtaining the first CSI-RS to be feedback and the 2nd CSI-RS to be feedback, wherein, first
CSI-RS and the 2nd CSI-RS comprise at least PMI respectively；
Configuration module 44, for configuring different feedback positions for the first CSI-RS and the 2nd CSI-RS；
Feedback module 46, for feeding back the first CSI-RS and the 2nd CSI-RS.
Illustrated with reference to an optional embodiment.
The present embodiment proposes to contain two eMIMO-type CSI- in an a kind of CSI process (CSI processes)
RS, and periodic feedback uses and reports form and content when two CSI-RS are intended to report PMI.
Scheme one：Periodic feedback under situation 2b, 2d
Occur two PMI in a CSI process to report, such as situation 2b, two CSI-RS are configured with 2d
" alternativeCodebookEnabledCLASSB_K1=TRUE ", now first CSI-RS CSI report comprising CQI+
PMI, or only PMI.
Mode 1：Periodic feedback, during the CQI feedback of broadband, carried again by PUCCH 1-1.
Additionally configured by high-level signaling first CSI-RS channel condition information feedback cycle and sub-frame offset M and
N.Obtained feedback cycle M refers to M times relative to second CSI-RS broadbands CQI feedback cycle, and N is relative to second
The N subframes of CSI-RS broadbands CQI feedback biasing.Special N=0, it is meant that first CSI-RS CQI+PMI or PMI feedback
Moment is the integral multiple at second CSI-RS CQI feedback moment (now CQI and PMI is combined coding), and sub-frame offset phase
Together, i.e., per M, the CQI feedback of second CSI-RS just includes first CSI-RS CSI feedback.
During N=0,
As shown in figure 5, when first CSI-RS is when needing to feed back CQI and PMI, CQI and PMI are also using combined coding
Mode, and the method for combined coding is same as the prior art.
When first CSI-RS is when needing PMI, the bit that PMI feedback fields include has：
Fig. 6 gives signal during N=0 and first CSI-RS feedback PMI.
Mode 2：Periodic feedback, during narrowband CQI feedback, carried again by PUCCH2-1.Introduce PTI (precodings
Type indicates), include different reporting types according to PTI values are different.
As PTI=1, only the CSI comprising second eMIMO-type class B K=1CSI-RS is reported, and is obeyed existing
There are the form and content of narrowband CQI feedback.
As shown in fig. 7, as PTI=0：Simultaneously comprising first and second eMIMO-type class B K=
1CSI-RS CSI is reported.Broadband CQI that one feedback kind is second eMIMO-type class B K=1CSI-RS and
(prior art) is reported after broadband PMI combined coding, another feedback kind is first eMIMO-type class B K
Reported after=1CSI-RS broadband CQI and broadband PMI1 (i1) combined coding.The form phase of the method for combined coding and mode 1
Together.
Scheme two：Periodic feedback under situation 2a
Occur two PMI in a CSI process to report, as being configured without in situation 2a
" alternativeCodebookEnabledCLASSB_K1=TRUE ", code book used are not all that 4 antennas increase according to antenna number
Strong code book, or 8 antenna codebooks, CSI feedback can be PMI1 (the long-term code book index in dicode sheet), can also include CQI and
PMI1。
When first CSI feedback only includes PMI1 (the long-term code book index in dicode sheet), second CSI feedback includes
During PMI+CQI+RI, Class A CSI feedback form and type can be directly used.
When first CSI feedback includes PMI (the long-term code book index in dicode sheet) and CQI, agreement can not be realized.
Mode 1：It is identical with mode 1 in scheme one, it is necessary to which additionally first CSI of configuration is anti-during the broadband CQI feedback in cycle
The cycle of feedback and biasing.
Feed back herein the moment, CQI and PMI1 (long-term code book index) carry out combined coding, and the mode of combined coding is：When
During Rank1=1,4bit CQI is then 4bit PMI (attention order) before this headed by feedback information；Work as Rank
When=2, feedback information is first 4bit CQI, is then 3bit space division CQI, finally for 4bit's
PMI, other Rank feedback information and its order such as following table：
Mode 2：During the narrowband CQI feedback in cycle, carried again by PUCCH2-1.Introduce PTI (precoding types
Instruction), include different reporting types according to PTI values are different.
As PTI=1, only the CSI comprising second eMIMO-type class B K=1CSI-RS is reported, and is obeyed existing
There are the form and content of narrowband CQI feedback.
As PTI=0：On CSI simultaneously comprising first and second eMIMO-type class B K=1CSI-RS
Report.Broadband CQI and broadband PMI that one feedback kind is second eMIMO-type class B K=1CSI-RS joint
(prior art) is reported after coding, another feedback kind is first eMIMO-type class B K=1CSI-RS width
Reported after band CQI and broadband PMI1 (i1) combined coding.The method of combined coding is identical with the form of mode 1.Fig. 8 is shown
PTI=1 schematic diagram.
Scheme three：Periodic feedback under situation 3b
It is linked in sequence its corresponding PMI by CSI-RS ID.
Example 1：As K=2, first CSI-RS includes two resources, referred to as ID1 and ID2, and the two resources are required for
Feed back PMI.The PMI for the two resources that are linked in sequence by ID, and reported at the feedback moment of high level configuration, during above-mentioned feedback
Carve to be the feedback moment of the new configuration in scheme one.
Scheme four：Periodic feedback in situation 4
Occur two PMI in a CSI process to report, as first CSI-RS is configured without in situation 4
" alternativeCodebookEnabledCLASSB_K1=TRUE ", code book used are not all that 4 antennas increase according to antenna number
Strong code book, or 8 antenna codebooks, CSI feedback can be PMI1 (the long-term code book index in dicode sheet).Second CSI-RS be
CLASS B and K>1CSI-RS, CSI are reported as CRI+CQI+PMI+RI.
Mode 1：Given the correct time on periodic broadband CQI, during according to PUCCH mode 1-1submode 1, first CSI-RS
PMI1 and second CSI-RS RI+PMI1 (+CRI) carry out combined coding, the method for combined coding is：
Fed back without CRI, in the subframe of only RI feedbacks, the mode of combined coding is：By the long-term of first CSI-RS
Code book index is placed in second CSI-RS order instruction and (following table) after long-term code book index joint instructions.Or by first
CSI-RS rank indication information is placed in before second CSI-RS order instruction and long-term code book index joint instructions.
In the subframe that CRI and RI feeds back, the mode of combined coding is：First CSI-RS long-term code book index is put
In second CSI-RS CRI, order instruction and (following table) after long-term code book index joint instructions.Or by first CSI-RS's
Rank indication information is placed in second CSI-RS CRI, order instruction with before long-term code book index joint instructions.Now, 4 antenna end
Different according to K values when maximum 4 layers of mouth transmits, first CSI-RS PMI1 available bits are different, when K is less than or equal to 4,
PMI1 can feed back completely；And K is when being more than 4, PMI1 needs to feed back after carrying out sub-sampling, and the sub- principle used is only takes odd number to index
Or only take even number index.Similarly 8 antenna ports are maximum 4 layers, maximum 8 layers situation.
Mode 1a：Given the correct time on periodic broadband CQI, during according to PUCCH mode 1-1submode 2, first CSI-RS
PMI1 and second CSI-RS RI (+CRI) carry out combined coding, the method for combined coding is：
Fed back without CRI, in the subframe of only RI feedbacks, the mode of combined coding is：By the long-term of first CSI-RS
Code book index is placed in after second CSI-RS order instruction (following table).Or first CSI-RS rank indication information is placed in
Before two CSI-RS order instruction.
In the subframe that CRI and RI feeds back, the mode of combined coding is：First CSI-RS long-term code book index is put
After second CSI-RS CRI, order instruction joint instructions (following table).Or first CSI-RS rank indication information is placed in
Second CSI-RS CRI, before order instruction joint instructions.
Mode 2：Periodic feedback, during narrowband CQI feedback, carried again by PUCCH2-1.Introduce PTI (precodings
Type indicates), include different reporting types according to PTI values are different.
As PTI=1, only second eMIMO-type class B K is included>1CSI-RS CSI is reported, and is obeyed existing
The form and content of narrowband CQI feedback.
As PTI=0：The CSI comprising first and second eMIMO-type CSI-RS is reported simultaneously.One reports
For second eMIMO-type class B K>1CSI-RS broadband CQI and broadband PMI2 (short-term code book index) joint are compiled
(prior art) is reported after code, another feedback kind is first eMIMO-type class B CSI-RS broadband PMI1
Reported with after first eMIMO-type class B CSI-RS broadband PMI1 (i1) combined coding.The method of combined coding
As described below：After first CSI-RS long-term code book index is placed in into second CSI-RS long-term code book index (under
Table).Or first CSI-RS rank indication information is placed in before second CSI-RS long-term code book index.
The CSI-RS that two eMIMO-type are included in a kind of CSI process, and two CSI- are provided in the present embodiment
Periodic feedback, which uses, when RS is intended to report PMI reports form, specifically gives the scheme in the case of two kinds：
Scheme one：Periodic feedback under situation 2b, 2d.
When mode 1 is periodic broadband CQI feedback, first CSI-RS channel status letter is additionally configured by high-level signaling
The feedback cycle and sub-frame offset M and N of breath.
When mode 2 is cycle narrowband CQI feedback, PTI (precoding type instruction) is introduced, two are only included in PTI=0
CSI-RS PMI is reported, and reporting types now and form
Scheme two：Periodic feedback under situation 2a
When first CSI feedback includes PMI (the long-term code book index in dicode sheet) and CQI, mode 1：The width in cycle
It is identical with mode 1 in scheme one, it is necessary to the additionally cycle of first CSI feedback of configuration and biasing during band CQI feedback.
Mode 2：During the narrowband CQI feedback in cycle, PTI (precoding type instruction) is introduced, it is different comprising not according to PTI values
Same reporting types.
Scheme three：Periodic feedback under situation 3b, it is linked in sequence its corresponding PMI by CSI-RS ID.
Scheme four：Periodic feedback in situation 4
Mode 1：Given the correct time on periodic broadband CQI, during according to PUCCH mode 1-1submode 1, first CSI-RS
PMI1 and second CSI-RS RI+PMI1 (+CRI) carry out combined coding, the method for combined coding
Mode 1a：Given the correct time on periodic broadband CQI, during according to PUCCH mode 1-1submode 2, first CSI-RS
PMI1 and second CSI-RS RI (+CRI) carry out combined coding, the method for combined coding
Mode 2：Periodic feedback, during narrowband CQI feedback, carried again by PUCCH2-1.Introduce PTI (precodings
Type indicates), include different reporting types according to PTI values are different.
CSI-RS comprising two eMIMO-type in a kind of CSI process is realized by the present embodiment, second
CSI-RS will report whole CSI information, and first CSI-RS will report part CSI and report form during comprising PMI.Can
Realize in the four cases how two different type CSI-RS PMI, provides more channels status information for eNB, aids in tune
Whole narrow-band beam direction and wave beam number etc., the utilization ratio of Beam resources is improved, improve throughput of system.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to they are stored
Performed in the storage device by computing device, either they are fabricated to respectively each integrated circuit modules or by they
In multiple modules or step be fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific
Hardware and software combines.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (11)
- A kind of 1. feedback method, it is characterised in that including：The first CSI-RS to be feedback and the 2nd CSI-RS to be feedback is obtained, wherein, the first CSI-RS and described second CSI-RS comprises at least PMI respectively；Different feedback positions is configured for the first CSI-RS and the 2nd CSI-RS；Feed back the first CSI-RS and the 2nd CSI-RS.
- 2. according to the method for claim 1, it is characterised in that configured for the first CSI-RS and the 2nd CSI-RS Different feedback positions include：Feedback cycle for the first CSI-RS configurations is M times of the feedback cycle for the 2nd CSI-RS configurations, also, The first CSI-RS is configured relative to the bigoted N number of subframes of the 2nd CSI-RS, wherein, the M and N are integer.
- 3. according to the method for claim 2, it is characterised in thatIn the case of the N=0, the CQI+PMI or PMI of the first CSI-RS feedback moment are the 2nd CSI-RS CQI and PMI combined codings feedback the moment integral multiple.
- 4. according to the method for claim 3, it is characterised in that the CQI+PMI of the first CSI-RS is combined coding.
- 5. the method according to claim 3 or 4, it is characterised in that the CQI+PMI or described second of the first CSI-RS CSI+PMI combined coding includes：In the case of order=1, the order after coding is followed successively by CQI, PMI；In the case of order=2, order after coding according to Secondary is CQI, space division CQI, PMI；Order be equal to other values in the case of, the order after coding be followed successively by broadband CQI, space division CQI, Broadband PMI.
- 6. according to the method for claim 1, it is characterised in thatAccording to the instruction of configured information, it is determined that only feed back the 2nd CSI-RS, or, feed back the first CSI-RS and described 2nd CSI-RS.
- 7. according to the method described in claim 6, it is characterised in that the configured information is PTI.
- 8. according to the method described in claim 6 or 7, it is characterised in thatFeeding back the 2nd CSI-RS and the first CSI-RS includes：It is second eMIMO-type class by feedback kind Fed back after B K=1CSI-RS broadband CQI and broadband PMI combined coding, be first eMIMO- by another feedback kind Fed back after type class B K=1CSI-RS broadband CQI and broadband PMI1 combined codings.
- 9. according to the method for claim 1, it is characterised in that also include：In the case where the first CSI-RI includes two resources, according to the resource that is linked in sequence of the mark of the resource Corresponding PMI, and fed back at the time of high level configures.
- 10. according to the method for claim 1, it is characterised in that feedback the 2nd CSI-RS and the first CSI-RS Including at least one of：Fed back without CRI, in the subframe of only RI feedbacks, the long-term code book index of the first CSI-RS is placed in the 2nd CSI- After RS order instruction and long-term code book index joint instructions；Or, the rank indication information of the first CSI-RS is placed in described Before second CSI-RS order instruction and long-term code book index joint instructions；In the subframe that CRI and RI feeds back, the long-term code book index of the first CSI-RS is placed in the 2nd CSI-RS's After CRI, order instruction and long-term code book index joint instructions；Or, the rank indication information of the first CSI-RS is placed in described 2nd CSI-RS CRI, order instruction with before long-term code book index joint instructions；Fed back without CRI, in the subframe of only RI feedbacks, the long-term code book index of the first CSI-RS is placed in described second After CSI-RS order instruction；Or, the rank indication information of the first CSI-RS is placed in the order instruction of the 2nd CSI-RS Before；In the subframe that CRI and RI feeds back, the long-term code book index of the first CSI-RS is placed in the 2nd CSI-RS's After CRI, order instruction joint instructions, or, the rank indication information of the first CSI-RS is placed in the 2nd CSI-RS's Before CRI, order instruction joint instructions.
- A kind of 11. feedback device, it is characterised in that including：Acquisition module, for obtaining the first CSI-RS to be feedback and the 2nd CSI-RS to be feedback, wherein, the first CSI- RS and the 2nd CSI-RS comprise at least PMI respectively；Configuration module, for configuring different feedback positions for the first CSI-RS and the 2nd CSI-RS；Feedback module, for feeding back the first CSI-RS and the 2nd CSI-RS.
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| CN102377526A (en) * | 2010-08-09 | 2012-03-14 | 上海贝尔股份有限公司 | Method and device for transmitting feedback information in MIMO (multiple input multiple output) communication system |
| US20120230290A1 (en) * | 2010-01-18 | 2012-09-13 | In Kwon Seo | Method and an apparatus for providing channel quality information in a wireless communication system |
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| US20120230290A1 (en) * | 2010-01-18 | 2012-09-13 | In Kwon Seo | Method and an apparatus for providing channel quality information in a wireless communication system |
| CN102377526A (en) * | 2010-08-09 | 2012-03-14 | 上海贝尔股份有限公司 | Method and device for transmitting feedback information in MIMO (multiple input multiple output) communication system |
| CN103095433A (en) * | 2011-11-04 | 2013-05-08 | 北京三星通信技术研究有限公司 | Method for sending hybridautomatic repeat-request acknowledgement (HARQ-ACK) feedback information |
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