CN101902309B - Feedback method and terminal for channel state information - Google Patents
Feedback method and terminal for channel state information Download PDFInfo
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- CN101902309B CN101902309B CN201010258997.2A CN201010258997A CN101902309B CN 101902309 B CN101902309 B CN 101902309B CN 201010258997 A CN201010258997 A CN 201010258997A CN 101902309 B CN101902309 B CN 101902309B
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- 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
- H04L1/0028—Formatting
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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
- H04B7/0626—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
- H04B7/0636—Feedback format
- H04B7/0645—Variable feedback
- H04B7/065—Variable contents, e.g. long-term or short-short
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- 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
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
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Abstract
The invention discloses a feedback method and a feedback terminal for channel state information. The method comprises the following steps that: the terminal compares the rank RI of a channel with a set value M; the terminal determines report types of multiple pieces of feedback channel state information according to the comparison result; and the terminal feeds back the channel state information by using the determined report type. The method and the terminal solve the problem of need of increasing the signaling cost or expanding the capacity of PUCCH existing in related feedback channel state information technology and increase the speed for feeding back the channel state information to a base station.
Description
Technical field
The present invention relates to mobile communication technology field, in particular to a kind of feedback method and terminal of channel condition information.
Background technology
In wireless communication system, transmitting terminal and receiving terminal take the mode of spatial reuse to use many antennas to obtain higher speed.Relative to general method for spacial multiplex, a kind of technology of enhancing be receiving terminal by information feedback to transmitting terminal, transmitting terminal uses according to the channel condition information obtained launches precoding technique, greatly can improve transmission performance.For single user multiple-input and multiple-output (Single User Multi-input Multi-output, SU-MIMO), channel characteristics Vector Message can be directly used to carry out precoding; For multi-user's multiple-input and multiple-output (Multiple User MIMO, MU-MIMO), need channel condition information more accurately.
At third generation partner program (3rd Generation Partnership Project, 3GPP) Long Term Evolution (Long Term Evolution, LTE) in, the feedback of channel condition information mainly utilizes the feedback method of better simply single code book, and the performance of the transmitting precoding technique of MIMO depends on the accuracy of wherein code book feedback.
Here the general principle channel condition information based on code book being quantized feedback is briefly described below:
Suppose that Limited Feedback channel capacity is Bbps/Hz, so can the number of code word be N=2
bindividual.The space of feature vectors of channel matrix is through quantizing to form codebook space
transmitting terminal and receiving terminal are jointly preserved or are produced this code book in real time
(transmitting terminal is identical with receiving terminal).To the channel H of needs feeding back channel state information (Channel State Information, CSI), receiving terminal according to certain criterion from codebook space
middle selection code word of mating most with actual channel H
, and by this code word
sequence number i (code word sequence number) feed back to transmitting terminal.Here, code word sequence is known as the precoding matrix indicators (Precoding Matrix Indicator, PMI) in code book.Transmitting terminal finds corresponding pre-encoding codeword according to this sequence number i
, thus also obtain corresponding channel condition information,
illustrate the characteristic vector information of channel.
In general, codebook space
can be divided into the code book that multiple number of plies (Rank) is corresponding further, under each Rank, the corresponding multiple code word of meeting quantizes the pre-coding matrix that this Rank lower channel characteristic vector is formed.Because the Rank of channel and non-zero characteristics vector number are equal, therefore, when in general Rank is N, code word all can have N to arrange.So, codebook space
can be divided into multiple sub-codebook by the difference of Rank, code book as shown in table 1 is divided into multiple sub-codebook signal table by Rank.
Table 1
Wherein, the code word needing storage when Rank > 1 is all matrix form.
Code book in LTE protocol is exactly the feedback method of this codebook quantification adopted, the code book signal table of descending 4 transmitting antennas of LTE that the descending 4 transmitting antenna code books of LTE are as shown in table 2, in fact in LTE, precoding codebook quantizes code book implication with channel condition information is the same.Hereinafter, for the purpose of unification, it is the matrix of 1 that vector also can regard a dimension as.
Table 2
Wherein,
i is unit battle array,
representing matrix W
kjth column vector.
representing matrix W
kjth
1, j
2..., j
nthe matrix that row are formed,
represent u
nassociate matrix; Wherein, n represents sequence number, and value is 0 ~ 15.
Usually a kind of important information type in described channel condition information is exactly the characteristic vector information of channel, is often called precoding information again.Owing to using code book to feed back this precoding information, be also often called pre-coding matrix instruction (Precoding Matrix Indicator, PMI) information.
In the standard of LTE, the minimum feedback unit of channel condition information is subband (Subband), and a subband is made up of several Resource Block (Resource Block, RB), each RB is made up of multiple Resource Unit (Resource Element, RE); RE is the least unit of running time-frequency resource in LTE.Object corresponding during UE feeding back channel state information can be subband, or multiple subband (Multi-Subband), and broadband (Wideband).
There is a lot of feedback model in LTE, under different transmission modes, have different feedback models, introduce the feedback model under the transmission mode of Closed-Loop Spatial Multiplexing here.
During spatial reuse, the feedback content of uplink channel status information mainly contains three kinds:
PMI information: characteristic feature Vector Message, recommends base station, for downlink precoding technology.
RI information: the order characterizing channel, recommends base station, as the number of plies of descending support.Maximum support RI=4 in LTE;
Channel quality information (Channel Quality Information, CQI), the quality information of channel is characterized, with the modulation coding mode recommended to characterize channel quality, more the modulation coding mode of high-order represents that performance is better, supports 16 kinds of CQI hierarchical selection in LTE altogether.
The feedback system of these important channel condition informations: PMI/RI/CQI comprises following two kinds:
Periodic feedback, is mainly carried on the feedback on Physical Uplink Control Channel (Physical Uplink Control Channel, PUCCH);
Non-periodic feedback, is carried on the feedback on Physical Uplink Shared Channel (Physical Uplink Shared Channel, PUSCH).
Be carried on the periodic feedback on PUCCH, be a kind of the most frequently used feedback, periodic feedback must configure.Non-periodic feedback is the feedback of irregular flip-over type, belongs to auxiliary feedback system, is for putting forward high-precision feedback, and its expense is general larger.
4 kinds of feedback kind (Type) are had in PUCCH upper signal channel state information periodic feedback mode in LTE:
Type 1: the subband CQI of the subband that feedback UE selects;
Type 2: the CQI in feedback broadband and PMI information;
Type 3: feedback RI information;
Type 4: the only CQI in feedback broadband.
Support the terminal of Closed-Loop Spatial Multiplexing pattern, relate to first three kind of above-mentioned feedback kind, in LTE, a kind of feedback system of Type 2 and Type 3 is as shown in table 3.
Table 3
The RI information of Report Type (Report Type) 3 is absolute codings, as being 1,2,3 or 4 with 2bit 4 state representation RI under 4Tx.
Comprise the PMI information of 4bit in Report Type 2, certain code word in instruction LTE code book, also comprises CQI information in addition.Be 2 CQI when being 1 CQI, RI > 1 during RI=1.Be 4bit during 1 CQI, during feedback 2 CQI, the 2nd CQI uses differential technique, based on the 1st CQI difference, is 3bit.Be 11bit to the maximum, the maximum supported expense of CSI information when this is also feedback on PUCCH.
Senior Long Term Evolution (Long Term Evolution Advanced, LTE-A) system, as the evolution standard of LTE, supports larger system bandwidth (reaching as high as 100MHz), and the existing standard of backward compatibility LTE.In order to improve covering and the throughput of cell edge, LTE-A is on the basis of existing LTE system, maximum 8 antennas have been arrived in descending support, and RI=8, and feeding back and proposing the technology that some feed back enhancing, mainly strengthen the feedback accuracy of code book, this technology can improve ternational Mobile Telecommunications (International Mobile Telecommunications-Advance, the IMT-Advance) system of evolution the availability of frequency spectrum, alleviate frequency spectrum resource in short supply.This technology can be described as:
1) precoding/feedback arrangement of a subband is made up of two matrixes.
2) each matrix in two matrixes is under the jurisdiction of an independent code book.Code book is known by base station and UE simultaneously in advance.Code book can change to some extent on different time and different subbands.
3) a matrix notation broadband or long time channel attribute.On another matrix notation determination frequency band or the in short-term attribute of channel.
4) the matrix code book used represents with the form of limited denumerable matrix stack, and for UE and base station, each matrix is known.
It can be seen, the feedback aspect of channel condition information proposes a kind of based on dicode structure originally, can be described as further:
For needing feeding back channel state information subband or multiple associating subband, UE is to base station feedback at least two PMI information, be respectively PMI1 and PMI2, the code word W 2 in code word W 1, the PMI2 corresponding another one code book C2 wherein in the corresponding code book C1 of PMI1.Base station end has the information of identical C1 and C2, from code book C1 and C2 of correspondence, find corresponding code word W 1 and W2 after receiving PMI1 and PMI2, and functional rule F (W1, W2) according to a preconcerted arrangement obtains channel condition information, such as: F (W1, W2)=W1*W2 or W2*W1.
Wherein, W1 necessarily represents broad-band channel state information, W1 or W1 combines fixing value W2 can the current spatial channel state information of complete representation; The channel condition information of W2 ordinary representation subband is also the channel condition information also representing broadband, and W2 itself cannot represent current spatial channel state information independently, depends on W1 and exists.
In LTE-A, under supporting the transmission mode of SU-MIMO/MU-MIMO, need in broadband/many sub-band channel state information of feedback, need the channel condition information of transmission to have RI, PMI1 and PMI2, and CQI.Correlation technique transmits these channel condition informations by feedback Type 2 and Type 3, such as, adopt following method:
Report Type3: rise to 3bit by 2bit;
Report Type2: comprise all PMI information and broadband CQI;
The Report Type2 of this method needs to transmit PMI1+PMI2+CQI, more than the maximum cost 11bit that PUCCH supports, therefore, needs PUCCH dilatation.
Or, when feeding back Type2 and Type3, increasing a Report Type Report Type and transmitting above-mentioned channel condition information, but can expense be increased like this.
It can thus be appreciated that the method for feeding back channel state information can not meet the demand of lte-a system in correlation technique, need to increase signaling consumption or dilatation PUCCH.
Summary of the invention
Main purpose of the present invention is the feedback method and the terminal that provide kind of channel condition information, with the problem of the increase signaling consumption or dilatation PUCCH that at least solve above-mentioned feeding back channel state information needs.
According to an aspect of the present invention, provide a kind of feedback method of channel condition information, comprising: terminal compares the order RI of channel and the size of set point M; This terminal determines the Report Type of multiple feeding back channel state information according to the result compared; This terminal uses the Report Type feeding back channel state information determined.
According to a further aspect in the invention, provide a kind of terminal, comprising: comparison module, for the size of the order RI and set point M that compare channel; Report determination module, for determining the Report Type of multiple feeding back channel state information according to the comparative result of comparison module; Feedback module, for the Report Type feeding back channel state information that operation report determination module is determined.
Pass through the present invention, adopt the Report Type feeding back channel state information determined, can under the prerequisite being no more than the maximum cost that PUCCH allows, make full use of overhead byte in Report Type by information feedback to base station, solve the problem of increase signaling consumption or the dilatation PUCCH needed in dependent feedback channel state information technology, improve the speed to base station feedback channel condition information.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the feedback method flow chart of a kind of channel condition information according to the embodiment of the present invention;
Fig. 2 is the feedback content schematic diagram of the channel condition information according to the embodiment of the present invention 1;
Fig. 3 is the feedback content schematic diagram of the channel condition information according to the embodiment of the present invention 2;
Fig. 4 is the feedback content schematic diagram of the channel condition information according to the embodiment of the present invention 3;
Fig. 5 is the feedback content schematic diagram of the channel condition information according to the embodiment of the present invention 4;
Fig. 6 is the feedback content schematic diagram of the channel condition information according to the embodiment of the present invention 5;
Fig. 7 is the feedback method flow chart of the channel condition information according to the embodiment of the present invention 6;
Fig. 8 is the structured flowchart of the terminal according to the embodiment of the present invention;
Fig. 9 is the concrete structure block diagram of the terminal according to the embodiment of the present invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
Fig. 1 shows the feedback method flow chart of a kind of channel condition information according to the embodiment of the present invention, and the method comprises the following steps:
Step S102: terminal compares the order RI of channel and the size of set point M;
Step S104: terminal determines the Report Type of multiple feeding back channel state information according to the result of above-mentioned comparison;
When RI is less than or equal to M, the code word W 1 in the two codebook structure of terminal use and the channel condition information in the characterized subband of code word W 2 or broadband; Terminal determines multiple Report Type feeding back channel state information, wherein, in the Report Type of the indication information of feedback RI except the indication information of RI, also comprise the allocated channel state information in subband or broadband, the subband in the present embodiment or the channel condition information in broadband represent with the indication information that code word W 1 associates with code word W 2.The present embodiment can adopt following several mode to represent: the allocated channel state information of the present embodiment can be set ownership indication information, such as: represent the code word indication information of W2 is in which part of code word W 2 place code book.
First kind of way
Terminal determination operation report type one, Report Type two and Report Type three feeding back channel state information; Wherein, Report Type one comprises the indication information of RI and the set ownership indication information of code word W 2 set division; Report Type two comprises the indication information of a code word W 1 and the channel quality indication (CQI) information CQI of n1 channel; Report Type three comprises the CQI of indication information in the set of code word W 2 corresponding to set ownership indication information and n2 channel; N1 and n2 be more than or equal to 1 integer.
The second way
Terminal determination operation report type one, Report Type two and Report Type three feeding back channel state information; Wherein, Report Type one comprises the indication information of RI and the set ownership indication information of code word W 2 set division; Report Type two comprises the CQI of indication information in the set of the indication information of a code word W 1, code word W 2 corresponding at least one set ownership indication information and n1 channel; Report Type three comprises the CQI of indication information in the set of n2 code word W 2 corresponding to set ownership indication information and n3 channel; N1 and n2 be more than or equal to 1 integer, n3 be more than or equal to 0 integer.
The third mode
Terminal determination operation report type one, Report Type two and Report Type three feeding back channel state information; Wherein, Report Type one comprises the indication information of RI, code word W 1 gathers the first set ownership indication information of dividing and code word W 2 gathers the second set ownership indication information divided; Report Type two comprises the CQI of indication information in the set of indication information in the set of code word W 1 corresponding to the first set ownership indication information, code word W 2 that at least one the second set ownership indication information is corresponding and n1 channel; Report Type three comprises the CQI of indication information in the set of code word W 2 corresponding to n2 second set ownership indication information and n3 channel; N1 and n2 be more than or equal to 1 integer, n3 be more than or equal to 0 integer.
4th kind of mode
Terminal determination operation report type one and Report Type two feeding back channel state information; Wherein, Report Type one comprises the indication information of RI and the set ownership indication information of code word W 2 set division; Report Type two comprises the CQI of indication information in the combination of the indication information of a code word W 1, code word W 2 corresponding at least one set ownership indication information and n1 channel; Wherein, n1 be more than or equal to 1 integer.
5th kind of mode
Terminal determination operation report type one and Report Type two feeding back channel state information; Wherein, Report Type one comprises the indication information of RI, code word W 1 gathers the first set ownership indication information of dividing and code word W 2 gathers the second set ownership indication information divided; Report Type two comprises the CQI of indication information in the set of indication information in the set of code word W 1 corresponding to the first set ownership indication information, code word W 2 that at least one the second set ownership indication information is corresponding and n1 channel; Wherein, n1 be more than or equal to 1 integer.
When RI is greater than M, terminal can adopt following manner determination Report Type:
Terminal uses 1 code word W to characterize the channel condition information in subband or broadband, or terminal uses the channel condition information in a fixing matrix and the characterized subband of code word W or broadband; Determine operation report type one and Report Type two feeding back channel state information; Wherein, Report Type one comprises the indication information of described RI, and when needing the indication information of feedback code W, Report Type two comprises the indication information of specified portions or whole code word W.
Indication information in above-mentioned Report Type one can adopt combined coding.
Above-mentioned RI value in 1 to N, wherein, N be the transmitting antenna of base station keep count of and this terminal reception antenna number in minimum value, M is the integer being greater than 1 and being not more than N.
Step S106: terminal uses the Report Type feeding back channel state information determined.
The terminal of the present embodiment can for supporting the equipment of Closed-Loop Spatial Multiplexing pattern.
The Report Type feeding back channel state information of the embodiment of the present invention by determining, can under the prerequisite being no more than the maximum cost that PUCCH allows, make full use of overhead byte in Report Type by information feedback to base station, solve the problem of increase signaling consumption or the dilatation PUCCH needed in dependent feedback channel state information technology, improve the speed to base station feedback channel condition information.
Embodiment 1
As shown in Figure 2, in the pattern supporting Closed-Loop Spatial Multiplexing, subscriber equipment at least uses three kinds of Report Types (Report Type) feeding back channel state information, comprises Report Type A, Report Type B and Report Type C; Wherein:
When the order RI of channel is less than or equal to M, subscriber equipment uses the channel condition information in code word W 1 and the characterized subband of code word W 2 or broadband, and the indication information of feedback code W1 and code word W 2 is to base station; Report Type A comprises the order RI of channel and the joint instructions information of a kind of code word W 2 set division; Report Type B comprises indication information and n1 the channel quality indication (CQI) information CQI of a W1; Report Type C comprises n2 another kind of code word W 2 and gathers the indication information and n3 channel quality indication (CQI) information CQI that divide; Wherein, the indication information of any one the another kind of W2 set in the set indication information of a kind of code word W 2 in Report Type A and Report Type C can uniquely indicate a code word W 2 jointly; N1 and n2 be more than or equal to 1 positive integer, n3 be more than or equal to 0 positive integer.
When the order RI of channel is greater than M, subscriber equipment use 1 code word W to represent the channel condition information in subband or broadband and the indication information of feedback code W to base station or not feedback code information; Or subscriber equipment uses code word W 1 and the characterized subband of W2 of fixing value or the channel condition information in broadband, and the indication information of feedback code W1 is to base station or not feedback code information; Report Type A comprises the indication information of the order RI of information indicative channel, and when needing the indication information of feedback code W, Report Type B packets of information contains indication information or the indication information of part or all of code word W;
Order RI value in 1 ~ N of channel, N=min (transmitting antenna of base station keeps count of, the reception antenna number of subscriber equipment), M is the integer being greater than 1 and being not more than N.
When the order RI of channel is greater than M, Report Type A does not comprise the indication information of code word W, or Report Type A also comprises the indication information of partial codeword W, or Report Type A also comprise the indication information of W1.
At least one channel quality instruction (CQI) information is also comprised in Report Type B;
The indication information that the order RI of the channel in Report Type A and a kind of W2 gathers adopts combined coding.
When the order of channel is less than or equal to M, the joint instructions information in Report Type A can indicate a W2 codeword set in code book C2, and in Report Type B, the indication information of W2 uniquely can indicate the code word of a W2 in W2 codeword set.
Such as, the port number of the current transmitting antenna of terminal is 4, and the Report Type that terminal feedback channel condition information uses is as follows:
Report Type A is the report of a PUCCH, the codeword set of the indication information and 1 bit W2 that include m1 bit RI divides indication information (also can be called set ownership indication information), the codeword set of the W2 of 1 bit divides indication information and all W2 code words can be divided into two codeword set, antenna corresponding to codeword set is ULA (Uniform Linear Array, uniform linear array) situation, antenna corresponding to another codeword set is dual-polarized situation, wherein m1 be more than or equal to 1 positive integer.
Report Type B is also the report of a PUCCH, includes the indication information of a W1 and some CQI.Wherein, the code book of W1 is Release 8 code book, can indicate, and W1 is the information in a broadband with 4 bits.CQI is also broadband CQI, in time only having a streams of code words, only has a CQI, just has two CQI in time having two streams of code words.
Report Type C is the report of a PUCCH equally, and include the indication information that Report TypeA specifies W2 in W2 codeword set, occupy 2 bits, W2 is the information of a subband; Also have subband position indication information in a BP (Back Propagation, backpropagation), occupy 2 bits; In time having two streams of code words, there are two CQI, need 4 bits and 3 bits respectively.
Provide a more concrete example below so that W1 to be described, the concepts such as W2.Suppose that the transmitting antenna port number of current downlink is 4, for the order rank=1,2 of channel, use two codebook structure; For rank=3,4, keep the single codebook structure using Release 8.
For the subband of in rank=1,2, a pre-coding matrix W is the form of the product of two matrix W 1 and W2.Here, W1 ∈ C1 and W2 ∈ C2.
C2={C
2,0..., C
2,7the code book of 3 bits, wherein, C
2, jrepresent a jth code word in C2, j=0,1 ..., 7; W2 is 4 × 4 diagonal square matrix, and be also a unitary matrix, W2 is selected from C2.
k＝0，...，3：C
2，k＝diag{1，e
jθ，e
j2θ，e
j3θ}，
k＝4，5：C
2，k＝diag{1，1，α，α}α＝1，j
k＝6，7：C
2，k＝diag{1，e
jθ，1，e
jθ}，
C1 is the code book of 4 transmitting antenna rank=1 or 2 in Release 8, and W1 is Nt × R matrix, is selected from C1.
For R=3,4, a corresponding precoding W is selected from the code book of 4 transmitting antenna rank=R of Release 8.
Codeword set for Report Type A, the W2 of 1 bit divides indication information can be divided into two codeword set { C by all W2 code words
2,0..., C
2,3and { C
2,4..., C
2,7, a codeword set { C
2,0..., C
2,3corresponding antenna is the situation of ULA (Uniform Linear Array, uniform linear array), another codeword set { C
2,4..., C
2,7corresponding antenna is dual-polarized situation, wherein m1 be more than or equal to 1 positive integer.
Report Type C includes the indication information that Report Type A specifies W2 in W2 codeword set, occupies 2 bits.
The W2 of Report Type A indication information (set ownership indication information) instruction of being correlated with should select the first half code word or later half code word, which the W2 of Report Type C indication information of being correlated with to indicate in the first half code word or later half code word be exactly W2, and comprehensive two parts information completely can determine the value of W2.
Embodiment 2
As shown in Figure 3, in the pattern supporting Closed-Loop Spatial Multiplexing, subscriber equipment at least uses three kinds of Report Types (Report Type) feeding back channel state information, comprises Report Type A, Report Type B and Report Type C; Wherein:
When the order RI of channel is less than or equal to M, subscriber equipment uses the channel condition information in code word W 1 and the characterized subband of code word W 2 or broadband, and the indication information of feedback code W1 and code word W 2 is to base station; Report Type A comprises the indication information of the order RI of channel and the combined coding of a kind of code word W 2 set division; Report Type B comprises the indication information of a W1, the indication information of a W2 and n1 channel quality indication (CQI) information CQI; Report Type C comprises n2 another kind of code word W 2 and gathers the indication information and n3 channel quality indication (CQI) information CQI that divide; Wherein, the indication information of any one the another kind of W2 set in the set indication information of a kind of code word W 2 in Report Type A and Report Type C can uniquely indicate a code word W 2 jointly; N1 and n2 be more than or equal to 1 positive integer, n3 be more than or equal to 0 integer.
When the order RI of channel is greater than M, subscriber equipment use 1 code word W to represent the channel condition information in subband or broadband and the indication information feeding back described code word W to base station or not feedback code information; Or subscriber equipment uses code word W 1 and the characterized subband of W2 of fixing value or the channel condition information in broadband, and the indication information of feedback code W1 is to base station or not feedback code information; Report Type A comprises the indication information of the order RI of information indicative channel, and when needing the indication information of feedback code W, Report Type B packets of information contains indication information or the indication information of part or all of code word W;
Order RI value in 1 ~ N of channel, N=min (transmitting antenna of base station keeps count of, the reception antenna number of subscriber equipment), M is the positive integer being greater than 1 and being not more than N.
When the order RI of channel is greater than M, Report Type A does not comprise the indication information of code word W, or Report Type A also comprises the indication information of partial codeword W, or Report Type A also comprises the indication information of W1.
At least one channel quality instruction (CQI) information is also comprised in Report Type B;
The indication information that the order RI of the channel in Report Type A and a kind of W2 gathers adopts combined coding.
When the order of channel is less than or equal to M, the joint instructions information in Report Type A can indicate a W2 codeword set in code book C2, and in Report Type B, the indication information of W2 uniquely can indicate the code word of a W2 in W2 codeword set.
Such as, the port number of the current transmitting antenna of terminal is 4, and the Report Type that terminal feedback channel condition information uses is as follows:
Report Type A is the report of a PUCCH, the codeword set of the indication information and 1 bit W2 that include m1 bit RI divides indication information, the codeword set of the W2 of 1 bit divides indication information and all W2 code words can be divided into two codeword set, antenna corresponding to codeword set is the situation of ULA, antenna corresponding to another codeword set is dual-polarized situation, wherein m1 be more than or equal to 1 positive integer.
Report Type B is also the report of a PUCCH, includes the indication information of a W1 and some CQI.Wherein, the code book of W1 is Release 8 code book, can indicate, and W1 is the information in a broadband with 4 bits.CQI is also broadband CQI, only has a CQI in time only having a streams of code words, just has two CQI in time having two streams of code words.Be different from embodiment 1, this report also comprises the indication information that another W2 codeword set divides, and the set of the W2 that can indicate at Report Type A uniquely indicates the code word of a W2, and occupy 2 bits, W2 is a wide-band-message.
Report Type C is the report of a PUCCH equally, includes the indication information of another W2 codeword set, occupies 2 bits, and W2 is the information of a subband; Also have subband position indication information in a BP, occupy 2 bits; In time having two streams of code words, there are two CQI, need 4 bits and 3 bits respectively.
Embodiment 3
As shown in Figure 4, in the pattern supporting Closed-Loop Spatial Multiplexing, subscriber equipment at least uses three kinds of Report Types (Report Type) feeding back channel state information, comprises Report Type A, Report Type B and Report Type C; Wherein:
When the order RI of channel is less than or equal to M, subscriber equipment uses the channel condition information in code word W 1 and the characterized subband of code word W 2 or broadband, and the indication information of feedback code W1 and code word W 2 is to base station; Report Type A comprises the order RI of channel, a kind of code word W 2 is gathered and to be divided and a kind of code word W 1 gathers the joint instructions information (that is, this joint instructions information comprises three parts: the set ownership indication information of the indication information of RI, the set ownership indication information of W2 and W1) divided; Report Type B comprises the indication information of another kind of code word W 1 set division, the indication information of a W2 and n1 channel quality indication (CQI) information CQI; Report Type C comprises n2 another kind of code word W 2 and gathers the indication information and n3 channel quality indication (CQI) information CQI that divide; Wherein, the indication information of any one the another kind of W2 set in the set indication information of a kind of code word W 2 in Report Type A and Report Type C can uniquely indicate a code word W 2 jointly; The indication information that the set of a kind of code word W 1 in Report Type A divides an another kind of W1 set division in indication information and Report Type B can uniquely indicate a code word W 1 jointly; N1 and n2 be more than or equal to 1 integer, n3 be more than or equal to 0 integer.
When the order RI of channel is greater than M, subscriber equipment use 1 code word W to represent the channel condition information in subband or broadband and the indication information of feedback code W to base station or not feedback code information; Or subscriber equipment uses code word W 1 and the characterized subband of W2 of fixing value or the channel condition information in broadband, and the indication information of feedback code W is to base station or not feedback code information; Report Type A comprises the indication information of the order RI of information indicative channel, and when needing the indication information of feedback code W, Report Type B comprises indication information or the indication information of specified portions or whole code word W;
Order RI value in 1 ~ N of channel, N=min (transmitting antenna of base station keeps count of, the reception antenna number of subscriber equipment), M is the positive integer being greater than 1 and being not more than N.
When the order RI of channel is greater than M, Report Type A does not comprise the indication information of code word W, or Report Type A also comprises the indication information of partial codeword W, or Report Type A also comprises the indication information of W1.
At least one channel quality instruction (CQI) information is also comprised in Report Type B;
The indication information that the order RI of the channel in Report Type A and a kind of W2 gathers adopts combined coding.
When the order of channel is less than or equal to M, the joint instructions information in Report Type A can indicate a W1 codeword set in code book C1, and in Report Type B, the indication information of W1 uniquely can indicate the code word of a W1 in W1 codeword set.
When the order of channel is less than or equal to M, the joint instructions information in Report Type A can indicate a W2 codeword set in code book C2, and in Report Type B, the indication information of W2 uniquely can indicate the code word of a W2 in W2 codeword set.
Such as, the port number of the current transmitting antenna of terminal is 4, and the Report Type that terminal feedback channel condition information uses is as follows:
Report Type A is the report of a PUCCH, the codeword set of the indication information and 1 bit W2 that include m1 bit RI divides indication information, the codeword set of the W2 of 1 bit divides indication information and all W2 code words can be divided into two codeword set, antenna corresponding to codeword set is the situation of ULA, and antenna corresponding to another codeword set is dual-polarized situation.Be different from embodiment 2, this report also comprise the W1 of a m2 bit codeword set divide indication information, wherein m1, m2 be more than or equal to 1 integer.
Report Type B is also the report of a PUCCH, the indication information of W1 and several CQI in the set including a m3 bit, in set the W1 that W1 indication information can indicate at Report Type A set in the code word of unique instruction W1.Wherein, the code book of W1 is Release 8 code book, can indicate, and W1 is the information in a broadband with 4 bits.CQI is also broadband CQI, only has a CQI in time only having a streams of code words, just has two CQI in time having two streams of code words.Be different from embodiment 1, this report also comprises the indication information that another W2 codeword set divides, and the set of the W2 that can indicate at Report Type A uniquely indicates the code word of a W2, and occupy 2 bits, W2 is a wide-band-message.
Report Type C is the report of a PUCCH equally, includes the indication information of another W2 codeword set, occupies 2 bits, and W2 is the information of a subband; Also have subband position indication information in a BP, occupy 2 bits; In time having two streams of code words, there are two CQI, need 4 bits and 3 bits respectively.
Embodiment 4
As shown in Figure 5, the Report Type of the subscriber equipment feeding back channel state information use of the present embodiment, except there is no Report Type C, identical with embodiment 2, no longer describe in detail here.
Embodiment 5
As shown in Figure 6, the Report Type of the subscriber equipment feeding back channel state information use of the present embodiment, except there is no Report Type C, identical with embodiment 3, no longer describe in detail here.
Embodiment 6
As shown in Figure 7, for terminal uses the feedback method flow chart of the channel condition information of the Report Type in above-described embodiment, the method comprises the following steps:
Step S702: terminal measures descending pilot frequency, obtains downlink channel condition information;
Step S704: terminal calculates RI, WI, W2 and CQI according to channel condition information, or calculate RI, W and CQI;
Step S706: terminal feeds back WI, W2 and CQI on PUCCH;
Terminal, when feeding back WI, W2 and CQI, uses the Report Type provided in above-described embodiment, no longer describes in detail here.
Step S708: base station receives WI, W2 and CQI on PUCCH, obtains new channel condition information.
During terminal feedback WI, W2 and CQI of the embodiment of the present invention, the Report Type determined is adopted to carry out, can under the prerequisite being no more than the maximum cost that PUCCH allows, make full use of overhead byte in Report Type by information feedback to base station, solve the problem of increase signaling consumption or the dilatation PUCCH needed in dependent feedback channel state information technology, improve the speed to base station feedback channel condition information.
Fig. 8 shows the structured flowchart of a kind of terminal according to the embodiment of the present invention, and this terminal comprises:
Comparison module 82, for the size of the order RI and set point M that compare channel;
Report determination module 84, is connected with comparison module 82, for determining the Report Type of multiple feeding back channel state information according to the comparative result of comparison module 82;
Feedback module 86, is connected, for the Report Type feeding back channel state information that operation report determination module 84 is determined with report determination module 84.
The concrete structure block diagram of terminal as shown in Figure 9, this report determination module 84 comprises:
First characterization unit 842, for when RI is less than or equal to M, uses the channel condition information in code word W 1 in two codebook structure and the characterized subband of code word W 2 or broadband;
First determining unit 844, be connected with the first characterization unit 842, for determining multiple Report Type, wherein, in the Report Type of the indication information of feedback RI except the indication information of RI, also comprise the allocated channel state information in above-mentioned subband or broadband, the channel condition information in subband or broadband represents with the indication information that code word W 1 associates with code word W 2.The allocated channel state information of the present embodiment can be set ownership indication information, such as: represent the code word indication information of W2 is in which part of code word W 2 place code book;
Second characterization unit 846, for when RI is greater than M, uses single codebook structure, and 1 code word W characterizes the channel condition information in subband or broadband;
Second determining unit 848, is connected with the second characterization unit 846, for determining operation report type one and Report Type two feeding back channel state information; Wherein, Report Type one comprises the indication information of RI, and when needing the indication information of feedback code W, Report Type two comprises the indication information of specified portions or whole code word W.
Or the report determination module 84 in this terminal comprises above-mentioned first characterization unit 842 and the first determining unit 844, and the 3rd following characterization unit and the 3rd determining unit; Wherein:
3rd characterization unit, for when described RI is greater than described M, uses two codebook structure, the characterized subband of W2 of a W1 and fixing value or the channel condition information in broadband;
3rd determining unit, for determining that operation report type one and Report Type two feed back described channel condition information; Wherein, Report Type one comprises the indication information of described RI, and when needing the indication information of feedback code W1, Report Type two comprises the indication information of specified portions or whole code word W 1.
First determining unit 844 can have multiple implementation, such as:
First kind of way, the first determining unit 844 comprises:
First determines subelement, for determining operation report type one, Report Type two and Report Type three feeding back channel state information; Wherein, Report Type one comprises the indication information of RI and the set ownership indication information of code word W 2 set division; Report Type two comprises the indication information of a code word W 1 and the channel quality indication (CQI) information CQI of n1 channel; Report Type three comprises the CQI of indication information in the set of code word W 2 corresponding to set ownership indication information and n2 channel; N1 and n2 be more than or equal to 1 integer.
The second way, the first determining unit 844 comprises:
Second determines subelement, for determining operation report type one, Report Type two and Report Type three feeding back channel state information; Wherein, Report Type one comprises the indication information of RI and the set ownership indication information of code word W 2 set division; Report Type two comprises the CQI of indication information in the set of the indication information of a code word W 1, code word W 2 corresponding at least one set ownership indication information and n1 channel; Report Type three comprises the CQI of indication information in the set of n2 code word W 2 corresponding to set ownership indication information and n3 channel; N1 and n2 be more than or equal to 1 integer, n3 be more than or equal to 0 integer.
The third mode, the first determining unit 844 comprises:
3rd determines subelement, for determining operation report type one, Report Type two and Report Type three feeding back channel state information; Wherein, Report Type one comprises the indication information of RI, code word W 1 gathers the first set ownership indication information of dividing and code word W 2 gathers the second set ownership indication information divided; Report Type two comprises the CQI of indication information in the set of indication information in the set of code word W 1 corresponding to the first set ownership indication information, code word W 2 that at least one the second set ownership indication information is corresponding and n1 channel; Report Type three comprises the CQI of indication information in the set of code word W 2 corresponding to n2 second set ownership indication information and n3 channel; N1 and n2 be more than or equal to 1 integer, n3 be more than or equal to 0 integer.
4th kind of mode, the first determining unit 844 comprises:
4th determines subelement, for determining operation report type one and Report Type two feeding back channel state information; Wherein, Report Type one comprises the indication information of RI and the set ownership indication information of code word W 2 set division; Report Type two comprises the CQI of indication information in the combination of the indication information of a code word W 1, code word W 2 corresponding at least one set ownership indication information and n1 channel; Wherein, n1 be more than or equal to 1 integer.
5th kind of mode, the first determining unit 844 comprises:
5th determines subelement, for determining operation report type one and Report Type two feeding back channel state information; Wherein, Report Type one comprises the indication information of RI, code word W 1 gathers the first set ownership indication information of dividing and code word W 2 gathers the second set ownership indication information divided; Report Type two comprises the CQI of indication information in the set of indication information in the set of code word W 1 corresponding to the first set ownership indication information, code word W 2 that at least one the second set ownership indication information is corresponding and n1 channel; Wherein, n1 be more than or equal to 1 integer.
Indication information in above-mentioned Report Type one can adopt combined coding.
Above-mentioned RI value in 1 to N, wherein, N be the transmitting antenna of base station keep count of and this terminal reception antenna number in minimum value, M is the integer being greater than 1 and being not more than N.
The terminal of the present embodiment can for supporting the equipment of Closed-Loop Spatial Multiplexing pattern.
The Report Type feeding back channel state information of the embodiment of the present invention by determining, can under the prerequisite being no more than the maximum cost that PUCCH allows, make full use of overhead byte in Report Type by information feedback to base station, solve the problem of increase signaling consumption or the dilatation PUCCH needed in dependent feedback channel state information technology, improve the speed to base station feedback channel condition information.
The expense that the indication information that above embodiment makes full use of RI takies is smaller, the Report Type of the indication information of feedback RI will the feature of available free expense, indication information in the Report Type of the maximum cost that may allow more than PUCCH divides, and the set ownership indication information after dividing is sent to base station together with the indication information of RI, in follow-up Report Type, feed back the indication information in set corresponding to this set ownership indication information according to the instruction of base station.This mode can not increase expense, also without the need to dilatation PUCCH, can reach the object of feeding back channel state information.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a feedback method for channel condition information, is characterized in that, comprising:
Terminal compares the order RI of channel and the size of set point M;
Described terminal determines the Report Type of the described channel condition information of multiple feedback according to the result of described comparison;
Described terminal uses the Report Type determined to feed back described channel condition information;
Wherein, according to the result of described comparison, described terminal determines that the Report Type of the described channel condition information of multiple feedback comprises: when described RI is less than or equal to described M, the code word W 1 in the two codebook structure of described terminal use and the channel condition information in the characterized subband of code word W 2 or broadband; Described terminal determines that multiple Report Type feeds back described channel condition information, wherein, feed back the allocated channel state information also comprising described subband or described broadband in the Report Type of the indication information of described RI, the channel condition information in described subband or described broadband represents with the indication information that described code word W 1 associates with code word W 2;
Or, according to the result of described comparison, described terminal determines that the Report Type of the described channel condition information of multiple feedback comprises: when described RI is greater than described M, described terminal uses two codebook structure, the characterized subband of W2 of a W1 and fixing value or the channel condition information in broadband; Described terminal determination operation report type one and Report Type two feed back described channel condition information; Wherein, described Report Type one comprises the indication information of described RI, and when needing the indication information of feedback code W1, described Report Type two comprises the indication information of specified portions or whole code word W 1;
Wherein, when described RI is less than or equal to described M, described terminal determines that multiple Report Type feeds back described channel condition information and comprises one of following:
Described terminal determination operation report type one, Report Type two and Report Type three feed back described channel condition information; Wherein, described Report Type one comprises the indication information of described RI and the set ownership indication information of described code word W 2 set division; Described Report Type two comprises the indication information of a described code word W 1 and the channel quality indication (CQI) information CQI of n1 channel; Described Report Type three comprises the CQI of indication information in the set of described code word W 2 corresponding to described set ownership indication information and n2 channel; N1 and n2 be more than or equal to 1 integer;
Described terminal determination operation report type one, Report Type two and Report Type three feed back described channel condition information; Wherein, described Report Type one comprises the indication information of described RI and the set ownership indication information of described code word W 2 set division; Described Report Type two comprises the CQI of indication information in the set of the indication information of a described code word W 1, described code word W 2 corresponding to set ownership indication information described at least one and n1 channel; Described Report Type three comprises the CQI of indication information in the set of described code word W 2 corresponding to n2 described set ownership indication information and n3 channel; N1 and n2 be more than or equal to 1 integer, n3 be more than or equal to 0 integer;
Described terminal determination operation report type one, Report Type two and Report Type three feed back described channel condition information; Wherein, described Report Type one comprises the indication information of described RI, described code word W 1 gathers the first set ownership indication information of dividing and described code word W 2 gathers the second set ownership indication information divided; Described Report Type two comprises the CQI of indication information in the set of indication information in the set of described code word W 1 corresponding to described first set ownership indication information, the described code word W 2 that the second set ownership indication information is corresponding described at least one and n1 channel; Described Report Type three comprises the CQI of indication information in the set of described code word W 2 corresponding to the described second set ownership indication information of n2 and n3 channel; N1 and n2 be more than or equal to 1 integer, n3 be more than or equal to 0 integer;
Described terminal determination operation report type one and Report Type two feed back described channel condition information; Wherein, described Report Type one comprises the indication information of described RI and the set ownership indication information of described code word W 2 set division; Described Report Type two comprises the CQI of indication information in the combination of the indication information of a described code word W 1, described code word W 2 corresponding to set ownership indication information described at least one and n1 channel; Wherein, n1 be more than or equal to 1 integer;
Described terminal determination operation report type one and Report Type two feed back described channel condition information; Wherein, described Report Type one comprises the indication information of described RI, described code word W 1 gathers the first set ownership indication information of dividing and described code word W 2 gathers the second set ownership indication information divided; Described Report Type two comprises the CQI of indication information in the set of indication information in the set of described code word W 1 corresponding to described first set ownership indication information, the described code word W 2 that the second set ownership indication information is corresponding described at least one and n1 channel; Wherein, n1 be more than or equal to 1 integer.
2. method according to claim 1, is characterized in that, the indication information in described Report Type one adopts combined coding.
3. method according to claim 1, is characterized in that, described RI value in 1 to N, and wherein, N is that the transmitting antenna of base station keeps count of and the minimum value in the reception antenna number of described terminal, and described M is the integer being greater than 1 and being not more than N.
4. a mobile terminal, is characterized in that, comprising:
Comparison module, for the size of the order RI and set point M that compare channel;
Report determination module, for determining the Report Type of multiple feeding back channel state information according to the comparative result of described comparison module;
Feedback module, feeds back described channel condition information for the Report Type using described report determination module to determine;
Wherein, described report determination module comprises:
First characterization unit, for when described RI is less than or equal to described M, uses the channel condition information in code word W 1 in two codebook structure and the characterized subband of code word W 2 or broadband;
First determining unit, for determining that multiple Report Type feeds back described channel condition information, wherein, feed back the allocated channel state information also comprising described subband or described broadband in the Report Type of the indication information of described RI, the channel condition information in described subband or described broadband represents with the indication information that described code word W 1 associates with code word W 2;
Or described report determination module comprises:
3rd characterization unit, for when described RI is greater than described M, uses two codebook structure, the characterized subband of W2 of a W1 and fixing value or the channel condition information in broadband;
3rd determining unit, for determining that operation report type one and Report Type two feed back described channel condition information; Wherein, described Report Type one comprises the indication information of described RI, and when needing the indication information of feedback code W1, described Report Type two comprises the indication information of specified portions or whole code word W 1;
Wherein, described first determining unit comprises one of following:
First determines subelement, for determining that operation report type one, Report Type two and Report Type three feed back described channel condition information; Wherein, described Report Type one comprises the indication information of described RI and the set ownership indication information of described code word W 2 set division; Described Report Type two comprises the indication information of a described code word W 1 and the channel quality indication (CQI) information CQI of n1 channel; Described Report Type three comprises the CQI of indication information in the set of described code word W 2 corresponding to described set ownership indication information and n2 channel; N1 and n2 be more than or equal to 1 integer;
Second determines subelement, for determining that operation report type one, Report Type two and Report Type three feed back described channel condition information; Wherein, described Report Type one comprises the indication information of described RI and the set ownership indication information of described code word W 2 set division; Described Report Type two comprises the CQI of indication information in the set of the indication information of a described code word W 1, described code word W 2 corresponding to set ownership indication information described at least one and n1 channel; Described Report Type three comprises the CQI of indication information in the set of described code word W 2 corresponding to n2 described set ownership indication information and n3 channel; N1 and n2 be more than or equal to 1 integer, n3 be more than or equal to 0 integer;
3rd determines subelement, for determining that operation report type one, Report Type two and Report Type three feed back described channel condition information; Wherein, described Report Type one comprises the indication information of described RI, described code word W 1 gathers the first set ownership indication information of dividing and described code word W 2 gathers the second set ownership indication information divided; Described Report Type two comprises the CQI of indication information in the set of indication information in the set of described code word W 1 corresponding to described first set ownership indication information, the described code word W 2 that the second set ownership indication information is corresponding described at least one and n1 channel; Described Report Type three comprises the CQI of indication information in the set of described code word W 2 corresponding to the described second set ownership indication information of n2 and n3 channel; N1 and n2 be more than or equal to 1 integer, n3 be more than or equal to 0 integer;
4th determines subelement, for determining that operation report type one and Report Type two feed back described channel condition information; Wherein, described Report Type one comprises the indication information of described RI and the set ownership indication information of described code word W 2 set division; Described Report Type two comprises the CQI of indication information in the combination of the indication information of a described code word W 1, described code word W 2 corresponding to set ownership indication information described at least one and n1 channel; Wherein, n1 be more than or equal to 1 integer;
5th determines subelement, for determining that operation report type one and Report Type two feed back described channel condition information; Wherein, described Report Type one comprises the indication information of described RI, described code word W 1 gathers the first set ownership indication information of dividing and described code word W 2 gathers the second set ownership indication information divided; Described Report Type two comprises the CQI of indication information in the set of indication information in the set of described code word W 1 corresponding to described first set ownership indication information, the described code word W 2 that the second set ownership indication information is corresponding described at least one and n1 channel; Wherein, n1 be more than or equal to 1 integer.
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| CN201010258997.2A CN101902309B (en) | 2010-08-16 | 2010-08-16 | Feedback method and terminal for channel state information |
| PCT/CN2011/076330 WO2012028023A1 (en) | 2010-08-16 | 2011-06-24 | Method and terminal for channel state information feedback |
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| CN201010258997.2A CN101902309B (en) | 2010-08-16 | 2010-08-16 | Feedback method and terminal for channel state information |
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| CN101902309B (en) * | 2010-08-16 | 2015-06-03 | 中兴通讯股份有限公司 | Feedback method and terminal for channel state information |
| CN102651677B (en) * | 2011-02-24 | 2016-05-25 | 华为技术有限公司 | Code book indication feedback method and the device of MIMO |
| CN103220069A (en) * | 2012-01-20 | 2013-07-24 | 华为技术有限公司 | Method and device for feeding back channel state information |
| CN110649951B (en) * | 2015-11-06 | 2023-12-01 | 大唐移动通信设备有限公司 | Channel state information feedback and data transmission method and device |
| CN107888324A (en) * | 2016-09-29 | 2018-04-06 | 株式会社Ntt都科摩 | By mobile station, the feedback and method of reseptance of base station execution, mobile station and base station |
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| CN101902309B (en) * | 2010-08-16 | 2015-06-03 | 中兴通讯股份有限公司 | Feedback method and terminal for channel state information |
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| Publication number | Publication date |
|---|---|
| WO2012028023A1 (en) | 2012-03-08 |
| CN101902309A (en) | 2010-12-01 |
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