WO2014101350A1 - 报告信道状态信息的方法、用户设备和基站 - Google Patents
报告信道状态信息的方法、用户设备和基站 Download PDFInfo
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- WO2014101350A1 WO2014101350A1 PCT/CN2013/072369 CN2013072369W WO2014101350A1 WO 2014101350 A1 WO2014101350 A1 WO 2014101350A1 CN 2013072369 W CN2013072369 W CN 2013072369W WO 2014101350 A1 WO2014101350 A1 WO 2014101350A1
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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
- 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
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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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
- H04B7/0617—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 for beam forming
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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
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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
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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
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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
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/024—Channel estimation channel estimation algorithms
- H04L25/0242—Channel estimation channel estimation algorithms using matrix methods
- H04L25/0246—Channel estimation channel estimation algorithms using matrix methods with factorisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03343—Arrangements at the transmitter end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03891—Spatial equalizers
- H04L25/03898—Spatial equalizers codebook-based design
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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
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0204—Channel estimation of multiple channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Definitions
- Embodiments of the present invention relate to the field of wireless communications, and more particularly, to a channel state information CSI reporting method, a user equipment, and a base station. Background technique
- MIMO multiple input multiple output
- y is the received signal vector
- H is the channel matrix
- precoding matrix is the precoding matrix
- s is the transmitted symbol vector
- n is the measurement noise.
- Optimal precoding usually requires the transmitter to fully know the Channel State Information (CSI).
- CSI Channel State Information
- a commonly used method is User Equipment (UE) or Mobile Station (MS) or Relay (hereinafter referred to as UE) to quantize instantaneous CSI and report it to Node B (NodeB), including base station (Base). Station, BS), Access Point, Transmission Point (TP), Evolved Node B (eNB) or Relay (Relay), hereinafter referred to as base station.
- NodeB Node B
- NodeB Node B
- Base Base
- Station Base
- BS Base station
- TP Transmission Point
- eNB Evolved Node B
- Relay Relay
- the existing CSI information of the Long Term Evolution (LTE) system includes a Rank Indicator (RI), a Precoding Matrix Indicator (PMI), and a Channel Quality Indicator (CQI).
- RI Rank Indicator
- PMI Precoding Matr
- RI and PMI indicate the number of transmission layers and precoding matrices used, respectively.
- a set of precoding matrices used is generally referred to as a codebook, each of which is a codeword in a codebook.
- the above characteristics make each antenna port of the base station transmit data after the precoding matrix, and the transmission power of each antenna is constant.
- Deploying low-power node nodes in a macro-cell network is an effective way to achieve higher coverage and capacity gain through space reuse.
- This heterogeneous network deployment has been widely discussed in the LTE standardization process.
- the macro base station may cause serious interference to the low power node or the UE served by the micro base station.
- the prior art introduces an approximate blank The Almost Blanking Subframe (ABS) reduces the transmit power of the macro base station antenna to reduce the interference to the UE in the low power node or the coverage area of the micro base station.
- ABS The Almost Blanking Subframe
- the low power node or the micro base station can preferentially schedule the UE at the cell edge to use the ABS subframe. Therefore, the UE is prevented from being seriously interfered by the macro base station.
- the base station and the low-power node or the micro-base station need to be coordinated according to the interference condition, and the base station needs to semi-statically configure the ABS subframe through the high-layer signaling, which not only wastes the time-frequency resources of the base station, At the same time, scheduling flexibility is further limited. Summary of the invention
- the embodiments of the present invention provide a method for reporting channel state information CSI, a user equipment, and a base station, which reduces waste of scheduling resources caused by interference control performed by a base station.
- a method of reporting CSI including:
- the CSI includes a precoding matrix indicating PMI, and the PMI corresponds to the selected precoding matrix.
- F II W ll F , and II II F represents the Frobenius norm of the matrix.
- the V is not equal to the u.
- the reference signal port number is 4,
- the precoding matrix W is at least one of the following matrices:
- the precoding matrix W is at least one of the following matrices: , where e[O, 2r] ;
- the precoding matrix W is at least one of the following matrices:
- the reference signal port number is 4,
- the precoding matrix W is at least one of the following matrices:
- the precoding matrix W is at least one of the following matrices:
- the precoding matrix W is at least one of the following matrices:
- the precoding matrix W is at least one of the following matrices:
- the number of signal ports to be tested is 4,
- the precoding matrix W is at least one of the following matrices:
- the precoding matrix W is at least one of the following matrices:
- the number of the reference signal ports is 4, and the precoding matrix W is at least one of the following matrices:
- the number of the reference signal ports is 4, and the precoding matrix W is at least one of the following matrices:
- the number of signal ports to be tested is 4, and the matrix V and/or the matrix U is a long-term evolution LTE 8 downlink system 4 antenna The precoding matrix in the codebook corresponding to the port.
- the number of the signal ports to be tested is 4, and the matrix V is corresponding to the 8 antenna ports of the LTE 10 downlink system.
- the precoding matrix in the codebook is 4, and the matrix V is corresponding to the 8 antenna ports of the LTE 10 downlink system.
- a method of reporting CSI including:
- One or more row vectors, ⁇ is a constant.
- F II W ll F , and II II F represents the Frobenius norm of the matrix.
- the V is not equal to the U.
- the reference signal port number is 4, and the matrix V and/or the matrix U is a long term evolution LTE 8 downlink system 4 The precoding matrix in the codebook corresponding to the antenna port.
- the reference signal port number is 4, and the matrix V is a pre-code in the codebook corresponding to the LTE 10 downlink system 8 antenna port Encoding matrix.
- a method of reporting CSI including:
- CSI process configuration information sent by the base station, where the CSI process configuration information includes at least one CSI process, where each CSI process is associated with one reference signal resource and one or more interference measurement resources;
- F II W ll F , and II II F represents the Frobenius norm of the matrix.
- the first CSI process in the at least one CSI process corresponds to the first codebook
- the second CSI process corresponds to the second codebook.
- the precoding matrix in the first codebook is a precoding matrix W
- the precoding matrix of the second codebook is a precoding matrix P.
- the number of reference signal ports associated with the first CSI process is 4, and the precoding matrix W in the first codebook Is at least one of the following:
- Precoding matrix ⁇ is at least one of the following
- a method for reporting CSI including:
- the CSI process configuration information includes at least one CSI process, wherein each CSI process is associated with one reference signal resource and one or more interference measurement resources;
- a is a constant.
- the first CSI process in the at least one CSI process corresponds to the first codebook
- the second CSI process corresponds to the second codebook.
- the precoding matrix in the first codebook is a precoding matrix W
- the precoding matrix of the second codebook is a precoding matrix P.
- the number of reference signal ports associated with the first CSI process is 4, and the precoding matrix W in the first codebook Is at least one of the following:
- Precoding matrix P is at least
- a user equipment including:
- a receiving unit configured to receive a reference signal sent by the base station
- a storage unit configured to store a code book
- a sending unit configured to send, to the base station, a CSI, where the CSI includes a precoding matrix indicating a PMI, where the PMI corresponds to the selected precoding matrix.
- the V is not equal to the u.
- the reference signal port number is 4, and the matrix V and/or the matrix U is a long term evolution LTE R8 downlink system 4 The precoding matrix in the codebook corresponding to the antenna port.
- the reference signal port number is 4, and the matrix V is a pre-code in the codebook corresponding to the LTE 10 downlink system 8 antenna port Encoding matrix.
- a base station including:
- a sending unit configured to send a reference signal to the user equipment UE
- F II W ll F , and II II F represents the Frobenius norm of the matrix.
- the V is not equal to the u.
- the reference signal port number is 4,
- the reference signal port number is 4, and the matrix V and/or the matrix U is a long-term evolution LTE 8 downlink system 4 The precoding matrix in the codebook corresponding to the antenna port.
- the reference signal port number is 4, and the matrix V is a pre-code in a codebook corresponding to an LTE 10 downlink system 8 antenna port. Encoding matrix.
- a user equipment including:
- a receiving unit configured to receive CSI process configuration information sent by the base station, where the CSI process configuration information includes at least one CSI process, where each CSI process is associated with one reference signal resource and one or more interference measurement resources;
- a storage unit configured to store a code book
- a selecting unit configured to select, according to a reference signal resource and an interference measurement resource associated with each CSI process, a precoding matrix from a codebook stored by the storage unit, where the codebook includes a precoding matrix W,
- the W (xSV, where the matrix V is a matrix of Nxv, N is the number of reference signal ports, v ⁇ N, S is a row selection matrix for selecting one or more row vectors in the matrix V, ⁇ is Constant
- a sending unit configured to send, to the base station, a CSI corresponding to each CSI process, where the CSI includes a precoding matrix indication ⁇ , where the ⁇ corresponds to the selected precoding matrix.
- the first CSI process in the at least one CSI process corresponds to the first code stored by the storage unit
- the second CSI process in the at least one CSI process corresponds to the second codebook stored in the storage unit
- the precoding matrix in the first codebook is a precoding matrix w
- the second codebook is a precoding matrix P.
- the number of reference signal ports associated with the first CSI process is 4, and the first codebook stored in the storage unit is
- the precoding matrix W is at least one of the following:
- the number of reference signal ports associated with the second CSI process is 4, and the precoding matrix P in the second codebook stored by the storage unit is at least one of the following:
- a base station including:
- a sending unit configured to send CSI process configuration information to the user equipment UE, where the CSI process configuration information includes at least one CSI process, where each CSI process is associated with one reference signal resource and one or more interference measurement resources;
- a receiving unit configured to receive a CSI corresponding to each CSI process sent by the UE, where the CSI includes a precoding matrix indicating a PMI, where the PMI corresponds to a precoding matrix, where the precoding matrix is The UE is based on the reference signal and interference associated with each CSI process
- F II W ll F , and II II F represents the Frobenius norm of the matrix.
- the first CSI process in the at least one CSI process corresponds to the first codebook
- the second CSI process corresponds to the second codebook.
- the precoding matrix in the first codebook is a precoding matrix W
- the precoding matrix of the second codebook is a precoding matrix P.
- the number of reference signal ports associated with the first CSI process is 4, and the precoding matrix W in the first codebook Is at least one of the following:
- Precoding matrix ⁇ is at least one of the following
- a method for reporting CSI including:
- the CSI includes a precoding matrix indicating PMI, and the PMI corresponds to the selected precoding matrix W.
- the codebook includes a rank 1 codebook
- the selecting the precoding matrix W from the codebook based on the reference signal includes:
- a precoding matrix W is selected from the rank 1 codebook based on the reference signal.
- the all-zero matrix, % is the scaling factor. o o7 •
- 1 1 1 1 1 1 w 3 is a matrix in the second set, the second set includes
- w 4 is a matrix in the third set, the third set includes At least one of them, where " 2 is a scaling factor
- W 6 is a matrix in the fourth set, and the fourth set includes at least one of ⁇ 3 and a 3 ,
- W 6 is a matrix in the fifth set, and the fifth set includes a 3
- p is a non-negative integer
- n and N are positive integers, and b 0 2x nation denotes an all-zero matrix of 2 rows and n columns;
- W: 8 «4 , where , and select the matrix for the column, or the all-zero matrix, " 4 is the scaling factor,
- (Y 1 5 Y 2 ) is a matrix combination in the sixth set, and the sixth set includes at least one of the following matrix combinations:
- the seventh set includes at least one of the following matrix combinations: 1 "0" — 0—“0—“0— — 0— "0" — 0—
- the eighth set comprising at least one of the following matrix combinations
- Negative integer scaled to ⁇ .
- the codebook includes a rank 2 codebook
- the selecting the precoding matrix W from the codebook based on the reference signal includes:
- a precoding matrix W is selected from the rank 2 codebook based on the reference signal.
- w 12 is a matrix in the ninth set, and the ninth set includes at least one of a.
- f is the scaling factor, v m 0 2xl
- 0 0 w 14 is a matrix in the eleventh set, and the eleventh set includes " 7 and
- W 16 a 8 , where ( ⁇ 2 ) is a matrix combination in the twelfth set, the o , Y
- the thirteenth set includes at least one of the following matrix combinations:
- the fourteenth set includes at least one of the following:
- the factor, 0 2 ⁇ 1, represents the all-zero matrix of 2 rows and 1 column.
- ⁇ [0, 2 ⁇ ] , 0 2 ⁇ 4 denotes an all-zero matrix of 2 rows and 4 columns
- Five sets include at least one of them
- the sixteenth set includes at least one of the following matrix combinations'
- W 18 a 9 , where ⁇ , ⁇ 2 ) is a matrix combination in the seventeenth set,
- the seventeenth set includes at least one of the following matrix combinations: and ( 9)
- 0 4 ⁇ 1 represents the all-zero matrix of 4 rows and 1 column.
- the eighteenth set includes at least one of
- the nineteenth set includes at least one of the following matrix combinations:
- w 20 « 1 ( , where (Y 1 5 Y 2 ) is a matrix combination in the twentieth set, and the twentieth set includes at least one of the following matrix combinations
- W 2Q is
- a matrix in the twenty-first set includes At least one of them, and 63 ⁇ 4.
- the scaling factor, 0 2 ⁇ 1 represents the all-zero matrix of 2 rows and 1 column.
- the codebook includes a rank 3 codebook
- the selecting the precoding matrix W from the codebook based on the reference signal includes:
- w 22 is a matrix in the twenty-second set, and the twenty-second set includes
- 0 1 0 w 24 is a matrix in the twenty-third set, and the twenty-third set includes 1:
- ⁇ ⁇ [0, 2 ⁇ ] , 0 2 ⁇ 4 represents an all-zero matrix of 2 rows and 4 columns;
- the twenty-fourth set includes at least one of the following matrix combinations:
- w 26 « 13 wherein (Y 1 Y 2 ) is a matrix combination in the twenty-eighth set, the twenty-eighth set comprising at least one of the following matrix combinations
- 0 4 ⁇ 2 represents the all-zero matrix of 4 rows and 2 columns
- 0 4 ⁇ 1 represents the all-zero matrix of 4 rows and 1 column.
- 0 2xl represents an all-zero matrix of 2 rows and 1 column'
- the codebook includes a rank 4 codebook
- selecting the precoding matrix W from the codebook based on the reference signal includes:
- N is a positive integer
- 0 2xl represents an all-zero matrix of 2 rows and 1 column
- 16 is a scaling factor.
- ⁇ ⁇ [0, 2 ⁇ ] , 0 2 ⁇ 4 represents 2 rows and 4 columns of all zero matrix
- 0 2x2 represents an all-zero matrix of 2 rows and 2 columns
- the precoding matrix W W k W t , where k is an odd number and t is an even number
- the method further includes:
- the precoding matrix W is subjected to row permutation or column permutation according to the number of the antenna.
- a method for providing a CSI includes:
- the codebook includes a rank 1 codebook
- the selection of the precoding matrix W from the codebook according to the PMI includes:
- Root o o 1 "The precoding matrix W is selected from the rank 1 codebook according to the PMI.
- the reference signal port number is 4, the precoding matrix W WiWs, where
- W 2 is a matrix in the first set, and the first set includes
- At least one, where m 0,1, ⁇ , Nl , N is a positive integer, 0 2xl means 2
- the all-zero matrix of row 1 is the scaling factor.
- 1 1 1 1 1 1 w 3 is a matrix in the second set, the second set includes
- W 6 is a matrix in the fourth set, and the fourth set includes at least one of “ 3 and a 3 ,
- p is a non-negative integer
- n and N are positive integers
- b 0 2x lake represents an all-zero matrix of 2 rows and n columns;
- W 8 « 4 , where , and ⁇ 2 are column selection matrices, or all zero matrices, " 4 is a scaling factor,
- the sixth set includes at least one of the following matrix combinations:
- (Y 1 Y 2 ) is a matrix combination in the seventh set, and the seventh set includes the following combinations:
- One of the eight sets of combinations comprising at least one of the following combinations of matrices.
- Negative integer scaled to ⁇ .
- the codebook includes a rank 2 codebook
- selecting the precoding matrix W from the codebook according to the PMI includes: The PMI selects the precoding matrix W from the rank 2 codebook
- w 12 is a matrix in the ninth set, and the ninth set includes at least one of 6 ,
- W 13 is a matrix in the tenth set, and the tenth set includes J ⁇ ,
- w 14 is a matrix in the tenth-one set, the eleventh
- ⁇ ⁇ [0, 2 ⁇ ] , 0 2 ⁇ 2 represents an all-zero matrix of 2 rows and 2 columns;
- the twelfth set includes at least one of the following matrix combinations
- W 16 ⁇ 8 , where d, Y 2 ) is a matrix combination in the thirteenth set, and the thirteenth set includes at least one of the following matrix combinations:
- W 16 a 8 , where ( ⁇ 1 5 ⁇ 2 ) is a matrix combination in the fourteenth set, and the fourteenth set includes at least a proportional reduction
- the factor, 0 2 ⁇ 1, represents the all-zero matrix of 2 rows and 1 column.
- ⁇ ⁇ [0, 2 ⁇ ] , 0 2x4 represents an all-zero matrix of 2 rows and 4 columns;
- ⁇ is a matrix in the fifteenth set
- the tenth Five sets include at least one of them
- the sixteenth set includes at least one of the following matrix combinations:
- W 18 a 9 , where (Y 15 Y 2 ) is a matrix combination in the seventeenth set,
- the seventeenth set includes at least one of the following matrix combinations:
- 0 4 ⁇ 1 represents the all-zero matrix of 4 rows and 1 column.
- the nineteenth set includes at least one of the following matrix combinations and
- W 2 o « where (Y 1 Y 2 ) is a matrix combination in the twentieth set, The twentieth collection package or w 2 .
- ⁇ 2 is a matrix in the twenty-first set, and the twenty-first set includes At least one of them, and.
- ⁇ is a scaling factor, 0 2xl represents the all-zero matrix of 2 rows and 1 column.
- the codebook includes a rank 3 codebook
- selecting the precoding matrix W from the codebook according to the PMI includes: The PMI selects the precoding matrix W from the rank 3 codebook.
- w 22 is a matrix in the twenty-second set, and the twenty-second set includes
- 0 1 0 w 24 is a matrix in the twenty-third set, and the twenty-third set includes 1:
- the twenty-eighth set includes at least one of the following matrix combinations
- 0 4 ⁇ 2 represents the all-zero matrix of 4 rows and 2 columns
- 0 4 ⁇ 1 represents the all-zero matrix of 4 rows and 1 column.
- the twenty-ninth set includes at least one of the following matrix combinations:
- 0 2 ⁇ 1 represents the all-zero matrix of 2 rows and 1 column.
- the twenty-sixth set includes at least one of the following matrix combinations
- 0 2 ⁇ 1 represents the all-zero matrix of 2 rows and 1 column.
- the codebook includes a rank 4 codebook
- the selecting the precoding matrix W from the codebook according to the UI includes: The ⁇ selects the precoding matrix W from the rank 4 codebook.
- N is a positive integer
- 0 2xl represents an all-zero matrix of 2 rows and 1 column
- 16 is a scaling factor.
- the reference signal port number is 4 '
- ⁇ ⁇ [0, 2 ⁇ ] , 0 2 ⁇ 4 represents 2 rows and 4 columns of all zero matrix
- W 36 , where (YY 2 ) is a matrix combination in the twenty-seventh set,
- the twenty-seventh set includes at least one of the following matrix combinations:
- the precoding matrix W W k W t , where k is an odd number and t is an even number
- W k is used to indicate wideband channel state information
- W t is used to represent narrowband channel state information
- w k is used to represent long-term channel state information
- w t is used to represent short-term channel state information.
- the precoding matrix W is subjected to row permutation or column permutation according to the number of the antenna.
- a user equipment including:
- a receiving unit configured to receive a reference signal sent by the base station
- a selecting unit configured to select a precoding matrix W from a codebook stored in the storage unit based on the reference signal
- a sending unit configured to send, to the base station, a CSI, where the CSI includes a precoding matrix indicating a PMI, where the PMI corresponds to the selected precoding matrix W.
- the codebook includes a rank 1 codebook, where the selecting unit is specifically configured to use the rank based on the reference signal
- the precoding matrix w is selected in 1 codebook.
- A is a scaling factor
- 1 1 1 1 1 1 w 3 is a matrix in the second set, the second set includes
- w 4 is a matrix in the third set, the third set includes At least one of them, where ", is a scaling factor
- n and N are o
- W 6 is a matrix in the fourth set, and the fourth set includes At least one of a 3 ,
- W 6 is a matrix in the fifth set, and the fifth set includes 1 0 0 0
- At least one of a 3 , , , and o3 ⁇ 4, is a scaling factor
- X n and ⁇ are positive integers, and b 0 2x nation denotes an all-zero matrix of 2 rows and n columns;
- W 8 « 4 where , and select the matrix for the column, or the all-zero matrix, " 4 is the scaling factor,
- the sixth set includes at least one of the following matrix combinations:
- the seventh set includes at least one of the following matrix combinations:
- the codebook includes a rank 2 codebook
- the selecting unit is specifically configured to use the rank based on the reference signal
- the precoding matrix W is selected in the 2 codebook.
- w 12 is a matrix in the ninth set, and the ninth set includes " 6 "
- W 14 is a matrix in the eleventh set, and the eleventh set includes " 7 "
- the twelfth set includes at least one of the following matrix combinations
- W 16 « 8 , wherein ( ⁇ 15 ⁇ 2 ) is a matrix combination in the fourteenth set, and the fourteenth set includes at least a proportional reduction
- the factor, 0 2 ⁇ 1, represents the all-zero matrix of 2 rows and 1 column.
- 0 X 1 ⁇ 2 e —0 ⁇ _ ⁇ [0,2 ⁇ ] , 0 2x4 represents an all-zero matrix of 2 rows and 4 columns;
- the seventeenth set includes at least one of the following matrix combinations: , and ⁇ 3 ⁇ 4
- 0 4 ⁇ 1 represents the all-zero matrix of 4 rows and 1 column.
- the eight sets include at least one of and
- W 2 o a 1( , where (Y ⁇ D is a matrix combination in the nineteenth set,
- the nineteenth set includes at least one of the following matrix combinations:
- ⁇ 2 is a matrix in the twenty-first set, and the twenty-first set includes At least one of them, and.
- ⁇ is a scaling factor, 0 2xl represents the all-zero matrix of 2 rows and 1 column.
- the codebook includes a rank 3 codebook, and the selecting unit is specifically configured to use the rank based on the reference signal The precoding matrix W is selected in the 3 codebook.
- w 22 is a matrix in the twenty-second set, and the twenty-second set includes I and
- W 24 is a matrix in the twenty-third set, and the twenty-third set includes 1:
- W 25 W 26 where
- Q 2x4 represents an all-zero matrix of 2 rows and 4 columns;
- W 26 « 1 , where ⁇ 2 ) is a matrix combination in the twenty-fourth set, and the twenty-fourth set includes at least one of the following matrix combinations:
- W 2 6 wherein ( ⁇ ⁇ 2 ) is a matrix combination in the twenty-eighth set, the twenty-eighth set includes at least one of the following matrix combinations
- 0 4 ⁇ 2 represents the all-zero matrix of 4 rows and 2 columns
- 0 4 ⁇ 1 represents the all-zero matrix of 4 rows and 1 column.
- ( ⁇ 2 ) is a matrix combination in the twenty-ninth set, and the twenty-ninth set includes at least one of the following matrix combinations:
- 0 2 ⁇ 1 represents the all-zero matrix of 2 rows and 1 column
- the twenty-sixth set includes at least one of the following matrix combinations: 1 0
- the thirtieth set includes at least one of the following matrix combinations:
- 0 ⁇ represents the all-zero matrix of 2 rows and 1 column
- the codebook includes a rank 4 codebook, where the selecting unit is specifically configured to use the rank based on the reference signal The precoding matrix W is selected in the 4 codebook.
- N is a positive integer
- 0 2xl represents an all-zero matrix of 2 rows and 1 column
- " 16 is a scaling factor.
- t 2 rows, 4 columns, all zero matrix
- the twenty-seventh set includes at least the following matrix combinations.
- the precoding matrix W W k W t , where k is an odd number and t is an even number.
- the method further includes:
- a permutation unit configured to perform row permutation or column permutation on the precoding matrix W according to the number of the antenna.
- a base station including:
- a sending unit configured to send a reference signal to the user equipment UE
- a receiving unit configured to receive a CSI sent by the UE
- the precoding matrix W corresponds to the PMI; in combination with the twelfth aspect, in an implementation manner of the twelfth aspect, the codebook stored by the storage unit includes a rank 1 codebook, and the selecting The unit is specifically configured to use the rank 1 codebook according to the PMI The precoding matrix w is selected.
- w 4 is a matrix in the third set, the third set includes At least one of ⁇ 2 , wherein “ 2 is a scaling factor in combination with the twelfth aspect and the above implementation manner thereof.
- the number of reference signal ports sent by the sending unit is 4
- the precoding matrix W W 5 W 6 , wherein
- W 6 is a matrix in the fourth set, and the fourth set includes At least one of a 3 ,
- W 6 is a matrix in the fifth set, and the fifth set includes a 3
- ( ⁇ 1 ; ⁇ 2 ) is a matrix combination in the sixth set, and the sixth set includes at least one of the following matrix combinations:
- the seventh set includes at least one of the following matrix combinations:
- X 0 7x7 represents an all-zero matrix of 2 rows and 2 columns;
- W 10 « 5 , where and ⁇ 2 are column selection matrices, or all zero matrices, and ⁇ , ⁇ 2 ) is the first
- Negative integer, 5 is a scaling factor.
- the codebook stored by the storage unit includes a rank 2 codebook
- the selecting unit is specifically configured to use the The precoding matrix W is selected in the rank 2 codebook.
- w 12 is a matrix in the ninth set, and the ninth set includes " 6 "
- W 13 is a matrix in the tenth set, and the tenth set includes ⁇
- W 14 is a matrix in the eleventh set, and the eleventh set includes ⁇ 7 and
- W 16 ⁇ 8 , where ( ⁇ 15 ⁇ 2 ) is a matrix combination in the thirteenth set, ⁇ 2 ⁇ 1 ⁇ 2 ⁇ 1
- the thirteenth set includes at least one of the following matrix combinations:
- 0 2xl represents the all-zero matrix of 2 rows and 1 column.
- [0, 2 ⁇ ] , 0 2x4 represents an all-zero matrix of 2 rows and 4 columns;
- the five sets include at least one of the Wo,
- the sixteenth set includes at least one of the following matrix combinations
- W 18 a 9 , where ⁇ , ⁇ 2 ) is a matrix combination in the seventeenth set,
- the seventeenth set includes at least one of the following matrix combinations: and « 9
- 0 4 ⁇ 1 represents the all-zero matrix of 4 rows and 1 column.
- 0 Eight sets include at least one of, and
- the nineteenth set includes at least one of the following matrix combinations:
- W 2 o « 1 ( , where ( ⁇ ⁇ ⁇ is a matrix combination in the twentieth set, the twentieth set includes at least one of the following matrix combinations:
- W 2Q is ⁇ ⁇ [0, 2 ⁇ ]
- ⁇ is a matrix in the twenty-first set, the twenty-first set includes at least one of the mouths, and the sum is a scaling factor, and 0 2 ⁇ 1 represents an all-zero matrix of 2 rows and 1 column.
- the codebook stored by the storage unit includes a rank 3 codebook
- the selecting unit is specifically configured to use the The precoding matrix W is selected in the rank 3 codebook.
- w 22 is a matrix of the twenty-second set, the twenty-second set includes
- 0 1 0 w 24 is a matrix in the twenty-third set, and the twenty-third set includes 1:
- ⁇ ⁇ [0, 2 ⁇ ] 0 2x4 represents an all-zero matrix of 2 rows and 4 columns;
- the twenty-eighth set includes at least one of the following matrix combinations:
- 0 4 ⁇ 2 represents the all-zero matrix of 4 rows and 2 columns
- 0 4 ⁇ 1 represents the all-zero matrix of 4 rows and 1 column.
- the twenty-fifth set includes at least one of the following matrix combinations and
- W 30 « , where ⁇ 2 ) is a matrix combination in the twenty-sixth set,
- the twenty-sixth set includes at least one of the following matrix combinations: :
- 0 2xl represents an all-zero matrix of 2 rows and 1 column'
- the codebook stored by the storage unit includes a rank 4 codebook
- the selecting unit is specifically configured to use the PMI according to the PMI
- the precoding matrix W is selected in the rank 4 codebook.
- N is a positive integer
- 0 2xl represents an all-zero matrix of 2 rows and 1 column
- 16 is a scaling factor.
- 0 2x2 represents an all-zero matrix of 2 rows and 2 columns
- the precoding matrix W W k W t , wherein k is an odd number and t is an even number,
- W k is used to indicate wideband channel state information
- W t is used to represent narrowband channel state information
- W k is used to represent long-term channel state information
- W t is used to represent short-term channel state information.
- a permutation unit configured to perform row permutation or column permutation on the precoding matrix W according to the number of the antenna.
- an appropriate precoding matrix can be selected according to the interference condition, thereby selecting an antenna for data transmission and its power, thereby reducing scheduling caused by interference control by the base station. Waste of resources.
- FIG. 1 is a diagram of a method of reporting CSI in accordance with an embodiment of the present invention.
- FIG. 2 is a diagram of a method of reporting CSI according to another embodiment of the present invention.
- FIG. 3 is a diagram of a method of reporting CSI according to another embodiment of the present invention.
- FIG. 4 is a diagram of a method of reporting CSI according to another embodiment of the present invention.
- FIG. 5 is a block diagram of a user equipment in accordance with one embodiment of the present invention.
- FIG. 6 is a block diagram of a base station in accordance with one embodiment of the present invention.
- FIG. 7 is a block diagram of a user equipment in accordance with another embodiment of the present invention.
- FIG. 8 is a block diagram of a base station in accordance with another embodiment of the present invention.
- FIG. 9 is a block diagram of a user equipment in accordance with another embodiment of the present invention.
- FIG. 10 is a block diagram of a base station in accordance with another embodiment of the present invention.
- FIG 11 is a block diagram of a user equipment in accordance with another embodiment of the present invention.
- Figure 12 is a block diagram of a base station in accordance with another embodiment of the present invention.
- Figure 13 is a diagram of a method of reporting CSI in accordance with one embodiment of the present invention.
- Figure 14 is a diagram of a method of reporting CSI in accordance with one embodiment of the present invention.
- Figure 15 is a block diagram of a user equipment in accordance with one embodiment of the present invention.
- Figure 16 is a block diagram of a base station in accordance with one embodiment of the present invention.
- Figure 17 is a block diagram of a user equipment in accordance with another embodiment of the present invention.
- FIG. 18 is a block diagram of a base station in accordance with another embodiment of the present invention. detailed description
- GSM Global System of Mobile communication
- CDMA code division multiple access
- WCDMA Wideband Code Division Multiple Access
- GPRS General Packet Radio Service
- LTE Long Term Evolution
- LTE-A Advanced long term evolution
- UMTS Universal Mobile Telecommunication System
- the user equipment includes but is not limited to a mobile station (MS, Mobile Station), a mobile terminal (Mobile Terminal), a mobile telephone (Mobile Telephone), a mobile phone (handset).
- the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular"
- RAN Radio Access Network
- the user equipment can be a mobile phone (or "cellular"
- the telephone, the computer with wireless communication function, etc., the user equipment can also be a portable, pocket, handheld, computer built-in or vehicle-mounted mobile device.
- the method is performed by the UE, and may be, for example, a User Equipment (UE) or a Mobile Station (MS) or a Relay (hereinafter referred to as a UE).
- UE User Equipment
- MS Mobile Station
- Relay hereinafter referred to as a UE.
- the selected precoding matrix may be the precoding matrix W.
- the CSI includes a precoding matrix indicating a PMI, and the PMI corresponds to the selected precoding matrix.
- an appropriate precoding matrix can be selected according to the interference condition, thereby selecting an antenna port for data transmission and its power, thereby reducing interference control by the base station.
- the type of the reference signal in 101 is not limited in the embodiment of the present invention.
- it may be a channel state information reference signal, a demodulation reference signal, or a cell-specific reference signal.
- the UE may obtain a resource configuration of the reference signal by receiving a base station notification (for example, RRC signaling or downlink control information DCI) or based on a cell identifier ID, and obtain a reference signal in a corresponding resource or subframe.
- a base station notification for example, RRC signaling or downlink control information DCI
- the above antenna port corresponds to a reference signal port, which may correspond to one physical day.
- the line or antenna element may also correspond to a virtual antenna, wherein the virtual antenna is a weighted combination of physical antennas or antenna elements.
- the method further includes: determining, according to the reference signal, a rank indication I, where the RI corresponds to a number of useful transport layers, and may include
- the UE acquires a channel estimation value based on the reference signal
- the determined rank indicates the RI.
- the method further includes: determining, according to the reference signal, a rank indication RI, where the RI corresponds to a number of useful transmission layers, and may include a port number of the UE based on the reference signal, and a codebook subset. Limiting the unique value of the corresponding allowed RI to obtain the RI; wherein the codebook subset restriction may be notified by the base station to the UE by using high layer signaling such as RRC signaling.
- a precoding matrix is selected from the codebook based on a UE and predefined criteria such as channel capacity or throughput maximization criteria or chord minimization criteria.
- selecting a precoding matrix from the codebook in 102 may include: selecting a precoding matrix from the codebook subset based on the reference signal; wherein the codebook subset may be predefined; or The subset of codebooks that are reported by the UE to the base station and determined by the base station based on the UE reporting and notified to the UE; or determined by the UE and reported, such as the recently reported codebook subset.
- the precoding matrix of the structure W in step 102 is the product of two matrices S and V, that is,
- S is a row selection matrix for selecting one or more row vectors of the matrix V, whose elements are 1 or 0;
- V is a matrix of ⁇ , and N is the number of reference signal ports. Further, the matrix V can satisfy
- the precoding matrix having the structure W may be 1 0 0 0
- the precoding matrix of structure W can also be
- the matrix s in the formula (li) is used to select the first and third, second and fourth rows of the matrix v, respectively.
- the value can be from 0 to 2. Specifically, the value can be
- the precoding matrix having the structure W may also be 1 0 1 0 1 0 1 0 1 0
- the pre-coding matrix of structure W may be
- the matrix S in the formula (15) is used to select the first and second, second and third, third and fourth philosophies of the matrix V, respectively, and the value of S in the smoke.
- the value may be 0 to 2.
- the value may be ' ⁇ '- ' _ ⁇ ' _ ⁇ ⁇ ' _ ⁇ , etc.
- the precoding matrix with the structure W may also be
- the matrix S in the formula (19) is used to select the first and second, second and third, third and fourth rows, the first and fourth rows of the matrix V, respectively.
- 6» can be 0 to 2 specifically,
- the value can be 2 _3 _6 _8 _16 _32 and so on.
- the pre-coding matrix of structure W may also be
- the precoding matrix of structure W may be
- the precoding matrix having the structure W may also be
- the precoding matrix of the structure W shown in the equations (4) - (27) can be obtained by modifying the value of the precoding matrix with the structure W, which is not further enumerated here.
- the precoding matrix of structure W can also be
- W «-SV (31)
- ⁇ is a constant
- S is a row selection matrix
- matrix V is a precoding matrix in a codebook corresponding to the LTE R8 downlink system 4 antenna port and the V layer CSI 4 report.
- the precoding matrix of structure W may also be
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BR112015015892-7A BR112015015892B1 (pt) | 2012-12-31 | 2013-03-08 | Método de relatório ou recepção de informação de estado de canal, equipamento de usuário, e estação base |
MX2015008497A MX351964B (es) | 2012-12-31 | 2013-03-08 | Método de reporte de información de estado del canal, equipo de usuario y estación base. |
EP13869659.6A EP2930873B1 (en) | 2012-12-31 | 2013-03-08 | Method for reporting channel state information, user equipment and base station |
CA2896798A CA2896798C (en) | 2012-12-31 | 2013-03-08 | Channel state information reporting method, user equipment, and base station |
BR122018013140-3A BR122018013140B1 (pt) | 2012-12-31 | 2013-03-08 | Método e aparelho de relatório de informação de estado de canal, e método e aparelho de recepção de informação de estado de canal |
AU2013370813A AU2013370813A1 (en) | 2012-12-31 | 2013-03-08 | Method for reporting channel state information, user equipment and base station |
CN201380002314.9A CN104094547B (zh) | 2012-12-31 | 2013-03-08 | 报告信道状态信息的方法、用户设备和基站 |
US14/788,191 US20150304010A1 (en) | 2012-12-31 | 2015-06-30 | Channel state information reporting method, user equipment, and base station |
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AU2017203571A AU2017203571B2 (en) | 2012-12-31 | 2017-05-29 | Method for reporting channel state information, user equipment and base station |
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RU2015131849A (ru) | 2017-02-03 |
CA2896798C (en) | 2018-08-28 |
MX351964B (es) | 2017-11-06 |
CN104094547A (zh) | 2014-10-08 |
MX2015008497A (es) | 2016-03-08 |
EP2930873B1 (en) | 2024-04-24 |
AU2013370813A1 (en) | 2015-07-30 |
AU2017203571B2 (en) | 2018-10-18 |
RU2618384C2 (ru) | 2017-05-03 |
CN108063633A (zh) | 2018-05-22 |
BR112015015892B1 (pt) | 2019-06-25 |
CN104025470A (zh) | 2014-09-03 |
ZA201504976B (en) | 2016-07-27 |
EP2930873A1 (en) | 2015-10-14 |
CA2896798A1 (en) | 2014-07-03 |
US20150304010A1 (en) | 2015-10-22 |
CN104025470B (zh) | 2018-09-07 |
CN104094547B (zh) | 2017-12-05 |
AU2017203571A1 (en) | 2017-06-15 |
CN108092699A (zh) | 2018-05-29 |
BR112015015892A2 (pt) | 2017-07-11 |
WO2014101242A1 (zh) | 2014-07-03 |
BR122018013140B1 (pt) | 2020-05-26 |
CN108063633B (zh) | 2021-05-04 |
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