WO2012062199A1 - 信道状态信息的传输方法和设备 - Google Patents
信道状态信息的传输方法和设备 Download PDFInfo
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- WO2012062199A1 WO2012062199A1 PCT/CN2011/081927 CN2011081927W WO2012062199A1 WO 2012062199 A1 WO2012062199 A1 WO 2012062199A1 CN 2011081927 W CN2011081927 W CN 2011081927W WO 2012062199 A1 WO2012062199 A1 WO 2012062199A1
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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
- H04B7/0621—Feedback content
- H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback systems
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- 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
- H04B7/0619—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
- H04B7/0636—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
- 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
- H04L1/0031—Multiple signaling transmission
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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
- H04L25/0391—Spatial equalizers codebook-based design construction details of matrices
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a method and device for transmitting channel state information. Background technique
- MIMO Multiple-Input Multiple-Output
- a codebook-based implicit CSI (Channel State Information) feedback method is adopted.
- the user equipment the user equipment, that is, the terminal equipment
- the Precoding Matrix Indicator (PMI) the UE also needs to report the Channel Quality Indicator (CQI) of each codeword.
- CQI Channel Quality Indicator
- the UE assumes that the base station uses its recommended RI/PML.
- the value of ? ⁇ 11!1 £ ⁇ 0,1,2,3 ⁇ corresponds to Table 1 below (precoding matrix indication information and LTE in LTE system)
- PMHlne ⁇ 0,l,---,15 ⁇ corresponds to Table 2 below (precoding matrix indication information and LTE in LTE system)
- the correspondence between the codebook indexes in the antenna port codebook) is equal to the codebook index 11 in the RI value.
- a codebook-based implicit CSI feedback method is still used.
- a precoding matrix (W) is composed of two matrices (W1 and W2), and W1 and W2 respectively pass two PMIs (first PMI value corresponding to W1). , and the second PMI value, corresponding to the W2) indication.
- the codebook in the LTE R8/9 version is still used under the 2 antenna port and the 4 antenna port, and W1 is defined as a unit matrix, and the first PMI value contains 0 bit information, so no feedback is needed.
- the correspondence between the precoding matrix indication information in the LTE-A system and the codebook index in the 8-antenna port codebook is as shown in Tables 3 to 10.
- Table 3 is the Codebook for 1 -layer CSI reporting using antenna ports 15 to 22 (8-antenna port (port 15 ⁇ 22) data level report number used for reporting information status), that is, in the LTE-A system 8 antenna port Rank l codebook.
- Table 4 is the codebook for 2-layer CSI reporting using antenna ports 15 to 22 (8-antenna port (port 15 ⁇ 22) data level report number 2 is used for reporting the status information), that is, in the LTE-A system. 8 antenna port Rank 2 codebook.
- Table 5 is the Codebook for 3 -layer CSI reporting using antenna ports 15 to 22 (8-antenna port (port 15 ⁇ 22) data level report data file number is 3), that is, in the LTE-A system 8 antenna port Rank 3 codebook.
- Table 6 is the Codebook for 4-layer CSI reporting using antenna ports 15 to 22 (8-antenna port (port 15 ⁇ 22) data level report data packet number is 4), that is, in the LTE-A system 8 antenna port Rank 4 codebook.
- Table 7 is the Codebook for 1 -layer CSI reporting using antenna ports 15 to 22 (8-antenna port (port 15 ⁇ 22) data level report with 5 data layer information reported), that is, in the LTE-A system 8 antenna port Rank 5 codebook.
- Table 7 Table 8 is the Codebook for 1 -layer CSI reporting using antenna ports 15 to 22 (8-antenna port (port 15 ⁇ 22) data level report number 6 is used for reporting information status), that is, in the LTE-A system.
- the 8 antenna port is a Rank 6 codebook.
- Table 8 Table 9 is a codebook for 1 -layer CSI reporting using antenna ports 15 to 22 (8 antenna ports (ports 15 to 22) data layer number of 7 used to report information status information), that is, in the LTE-A system
- the 8 antenna port is a Rank 7 codebook.
- Table 10 is Codebook for 1 -layer CSI reporting using antenna ports 15 to 22 (8-antenna port (port 15 ⁇ 22) data state report used for reporting the status information of 8), that is, the 8 antenna port Rank 8 codebook in the LTE-A system.
- the ⁇ value ⁇ , ..., ⁇ corresponds to the second value of the codebook index in Table 3 ⁇ 1 , 2 , ..., 15 ) corresponds to the codebook index in Table 3;
- the ⁇ value ⁇ , ..., ⁇ corresponds to the second value of the codebook index in Table 4 ⁇ 1 , 2 , ..., 15 ) corresponds to the codebook index in Table 4;
- the first ⁇ ⁇ ⁇ 0 , 1 , 2 , 3 ) corresponds to the codebook index 1 in Table 5 second?
- the ⁇ 11 value ⁇ () , 1 , 2 , ''', 15 ⁇ corresponds to the codebook index 1 2 in Table 5;
- the first PMHi e ⁇ 0, i, 2 , 3 ⁇ corresponds to the codebook index 1 in Table 6 second?
- the ⁇ 11 value ⁇ () , 1 , 2 , ''', 15 ⁇ corresponds to the codebook index 1 2 in Table 6.
- the first PMHI ⁇ e ⁇ 0, 1, 2, 3 ⁇ corresponds to the codebook index ⁇ in Table 3
- the second PMI value e ⁇ 0 ⁇ corresponds to the code in Table 7. This index.
- the first PMHI ⁇ e ⁇ 0, 1, 2, 3 ⁇ corresponds to the codebook index in Table 4
- the second PMI value 1 ⁇ 2 e ⁇ 0 ⁇ corresponds to the code in Table 8.
- This index ⁇ For the 8 antenna port and the corresponding RI value is 7, the first PMHI ⁇ 0 , 1 , 2 , 3 ) corresponds to the codebook index ⁇ in Table 5, and the second PMI value 1 ⁇ 2 e ⁇ 0 ⁇ corresponds to the code in Table 9. This index ⁇ .
- the first PMI value i te ⁇ 0 ⁇ corresponds to the codebook index in Table 6
- the second PMI value! 2 e ⁇ 0 ⁇ corresponds to the codebook index in Table 10.
- the PUCCH 1-1 feedback mode under the 8-antenna port is supported.
- submode 1 There are currently two PUCCH 1-1 feedback modes, called submode 1 and submode 2.
- submode 2 the RI is reported in a single subframe, and the first PMI, the broadband second PMI, and the broadband CQI are reported in the same subframe, and the uplink control information reported by the first PMI, the broadband second PMI, and the broadband CQI (Uplink) Control
- the Information, UCI) field may be as shown in Table 11 or Table 12.
- TBD indicates that the current standard has not been determined.
- the total number of bits in a domain cannot exceed 11 bits.
- the first PMI value and the second PMI value in Table 3 need a total of 8 bits, and the 4-bit wideband CQI has a total of 12 bits and more than 11 bits.
- the first PMI value and the second PMI value in Table 4 need a total of 8 bits, and the 4-bit wideband CQI and the 3-bit spatial difference CQI have a total of 15 bits and more than 11 bits.
- the first PMI value and the second PMI value in Table 6 need a total of 5 bits, and the 4-bit wideband CQI and the 3-bit spatial difference CQI have a total of 12 bits and more than 11 bits.
- the PUCCH 2-1 feedback mode under the 8-antenna port is also supported, and the RI, the broadband first PMI, the broadband second PMI, and the CQI feedback are implemented based on 10 Precoder Type Indication (PTI) or RI, wideband second PMI and wideband CQI, subband second PMI and subband CQI feedback, wherein the uplink control information fields reported by the wideband PMI and the wideband CQI are as shown in Table 13.
- PTI Precoder Type Indication
- the second PMI value in Table 4 requires a total of 4 bits, plus a 4-bit sub-band CQI, a 3-bit spatial difference CQI, and a maximum 2-bit sub-band position indication, which are 13 bits in total, exceeding 11 bits.
- the second PMI value in Table 5 requires a total of 4 bits, plus 4 bits sub-band CQI, 3 20 bit space difference CQI and up to 2 bit sub-band position indication, a total of 13 bits, more than 11 bits.
- the second PMI value in Table 6 requires a total of 3 bits, plus a 4-bit sub-band CQI, a 3-bit spatial difference CQI, and a maximum 2-bit sub-band position indication, for a total of 12 bits, exceeding 11 bits.
- the codebook needs to be compressed, and after the codebook is compressed, the relationship between the first PMI value and the broadband second PMI value and the codebook index and ⁇ needs to be redefined.
- the relationship between the first PMI value and the broadband second PMI value and the codebook index and ⁇ needs to be redefined.
- the embodiment of the invention provides a method and a device for transmitting channel state information, which solves the problem that the corresponding relationship between the precoding matrix indication information and the codebook index after codebook compression is not defined in the prior art.
- an embodiment of the present invention provides a method for transmitting channel state information, including:
- an embodiment of the present invention further provides a terminal device, including: a receiving module, configured to receive control signaling sent by the base station, where the control signaling notifies a feedback mode used by the terminal device to perform channel state information feedback and channel state information feedback;
- a setting module configured to set a correspondence between the precoding matrix indication information and the codebook index in the original codebook
- a determining module configured to determine an RI value and a precoding matrix in the compressed precoding matrix set, and according to the RI value and the correspondence between the precoding matrix indication information set by the setting module and the codebook index in the original codebook Relationship, determining a value of the corresponding precoding matrix indication information;
- an embodiment of the present invention further provides a method for transmitting channel state information, including:
- the base station sends control signaling to the terminal device, and notifies the terminal device of the feedback mode used for channel state information feedback and channel state information feedback;
- the base station determines the precoding matrix according to the received RI value and the value of the precoding matrix indication information according to the correspondence between the preset precoding matrix indication information and the codebook index in the original codebook.
- a base station including:
- a setting module configured to set a correspondence between the precoding matrix indication information and the codebook index in the original codebook
- a sending module configured to send a control signaling to the terminal device, to notify the terminal device that a channel state information feedback and a feedback mode adopted by the channel state information feedback are needed; and a receiving module, configured to: according to the feedback mode notified by the sending module Receiving the terminal The RI value reported by the device and the value of the precoding matrix indication information;
- a determining module configured to: according to the RI value received by the receiving module and the value of the precoding matrix indication information, according to the correspondence between the precoding matrix indication information set by the setting module and the codebook index in the original codebook , determine the precoding matrix.
- the embodiment of the invention has the following advantages:
- the code needs to be performed for reporting the same subframe and the PUCCH capacity limitation due to the 8-antenna port PMI feedback.
- the correspondence between the precoding matrix precoding matrix indication information or the precoding matrix indication information pair and the codebook index or the codebook index pair is provided, and the channel state information feedback between the base station and the terminal device is implemented. With receiving.
- FIG. 1 is a schematic flowchart of a method for transmitting channel state information on a terminal device side according to an embodiment of the present invention
- FIG. 2 is a schematic flowchart of a method for transmitting channel state information on a base station side according to an embodiment of the present invention
- FIG. 3 is a schematic structural diagram of a terminal device according to an embodiment of the present invention
- FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention. detailed description
- the embodiment of the present invention provides a transmission scheme of channel state information.
- the application of the mode submode 2 in the PUCCH 1-1 can be adopted.
- the scenario or PUCCH mode 2-1 feedback and reception of channel state information between the base station and the terminal device is implemented.
- FIG. 1 it is a schematic flowchart of a method for transmitting channel state information according to an embodiment of the present invention, which specifically includes the following steps:
- Step S101 The terminal device receives control signaling sent by the base station.
- the control signaling notifies the terminal device that the channel state information feedback and the feedback mode adopted by the channel state information feedback are needed.
- the terminal device before the step S101, the terminal device further receives the broadcast information sent by the base station, and learns that the current base station is an 8-antenna port configuration.
- Step S102 The terminal device determines the RI value and the precoding matrix in the compressed precoding matrix set, and determines the corresponding precoding according to the correspondence between the preset precoding matrix indication information and the codebook index in the original codebook.
- the matrix indicates the value of the information.
- the foregoing original codebook is specifically an 8-antenna port codebook in the LTE-A system.
- a similar situation exists, such a name. The change does not affect the scope of protection of the present invention.
- the schematic description of the original codebook will be described herein, and the description will not be repeated.
- Case 1 When the precoding matrix indication information that is determined by the terminal device specifically includes the first precoding matrix indication information and the second precoding matrix indication information, the terminal device according to the RI value and the preset first precoding matrix indication information And determining, by the second precoding matrix indication information and the correspondence between the two codebook indices ⁇ and 12 in the original codebook, the values of the first precoding matrix indication information and the second precoding matrix indication information.
- the correspondence in this case includes the following types according to different RI values:
- the foregoing correspondence includes: the value of the first precoding matrix indication information £ ⁇ () , 1 , ''', 7 ⁇ corresponds to the original Rank 1
- the codebook index should be in the original Rank 1 codebook; or, the value of the first precoding matrix indication information £ ⁇ () , 1 , ''', 7 ⁇ corresponds to the codebook index in the original Rank 1 codebook.
- the value of the second precoding matrix indication information ⁇ e ⁇ 1 ''"' 15 ⁇ corresponds to the codebook index 12 in the original Rank 1 codebook; or, the value of the first precoding matrix indication information e ⁇ i , '", 15 ⁇ corresponding to the codebook index in the original Rank 1 codebook, the value of the second precoding matrix indication information 12 e ⁇ ' 1 '"'' 7 ⁇ corresponds to the codebook index 12 in the original Rank 1 codebook; or
- the value of the first precoding matrix indication information e ⁇ i , '", 15 ⁇ corresponds to the codebook index in the original Rank 1 codebook and when the value of the second precoding matrix indicates information ⁇ 1 ⁇ 3 ⁇ Corresponding to the codebook index in the original Rank 1 codebook, when the value of the second precoding matrix indication information is £ ⁇ 4, 5, 6, 7 ⁇ , corresponding to the codebook index i 2 +8 in the original Rank 1 codebook Or, the value of the first precoding matrix indication information e ⁇ i , '", 15 ⁇ corresponds to the codebook index in the original Rank 1 codebook, and the value of the second precoding matrix indication information is 12 e ⁇ ' 1 '"'' 7 ⁇ corresponds to the codebook index 12+4 in the original Rank1 codebook; or, the value of the first precoding matrix indication information e ⁇ i , '", 15 ⁇ corresponds to the codebook in the original Rank 1 codebook Index, the value of the second precoding matrix indication information 12 e ⁇ '
- the value of the first precoding matrix indication information 1 1 £ ⁇ () , 1 , ''', 7 ⁇ corresponds to the codebook index Lii / 2 in the original Rank 1 codebook
- the value of the second precoding matrix indicates information ⁇ e ⁇ Q , 1 ⁇ corresponds to the codebook index 2+4 in the original Rank 1 codebook
- the value of the first precoding matrix indication information e ⁇ i , ''', 7 ⁇ corresponds to the codebook index ⁇ in the original Rank 1 codebook, and the value of the second precoding matrix indication information corresponds to the original Rank 1 codebook.
- the value of the first precoding matrix indication information ⁇ e ⁇ i , ''', 7 ⁇ corresponds to the codebook index /2" in the original Rank 1 codebook
- the value of the second precoding matrix indication information ⁇ 2 ⁇ G' 1 ⁇ corresponds to the codebook index + 8 in the original Rank 1 codebook
- the value of the first precoding matrix indication information ⁇ e ⁇ i , ''', 7 ⁇ corresponds to the codebook index in the original Rank 1 codebook
- the value of the second precoding matrix indication information ⁇ ⁇ G' 1 ⁇ corresponds to the original Rank 1 codebook in the codebook index + 8 ;
- the value of the first precoding matrix indication information ⁇ e ⁇ i , ''', 7 ⁇ corresponds to the codebook index Lii / 2 J in the original Rank 1 codebook
- the value of the second precoding matrix indication information 12 e ⁇ Q , 1 ⁇ corresponds to the codebook index 12 in the original Rank 1 codebook
- the value of the first precoding matrix indication information ⁇ , ⁇ ..., ⁇ corresponds to the codebook index in the original Rank 1 codebook.
- the value of the second precoding matrix indication information e ⁇ Q , 1 ⁇ corresponds to the original In the Rank 1 codebook, the codebook is 1 zi2 + iz ; or, the value of the first precoding matrix indication information 11 e ⁇ i , ''', 7 ⁇ corresponds to the codebook index Lii / 2 in the original Rank 1 codebook.
- the value of the second precoding matrix indication information i2 e ⁇ Q , 1 ⁇ corresponds to the codebook index 2i2 in the original Rank 1 codebook
- the value of the second precoding matrix indicates information ⁇ € ⁇ 3 , 4 ⁇ corresponds to the codebook index + 5 in the original Rank 1 codebook
- the value of the first precoding matrix indication information 11 e ⁇ i , ''', 7 ⁇ corresponds to the original Rank 1 codebook
- the second precoding matrix indicates the value i 2 of the information When e ⁇ 3, 4 )
- it corresponds to the codebook index 2i 2 + 5 in the original Rank i codebook
- the value of the first precoding matrix indication information e ⁇ i , "', 15 ⁇ corresponds to the original Rank 1
- the value of the first precoding matrix indication information: £ ⁇ () , 1 , ''', 7 ⁇ corresponds to the codebook index 2 ⁇ in the original Rank 1 codebook
- the value of the second precoding matrix indication information ⁇ G' 1 ⁇ corresponds to the codebook index 8i 2 in the original Rankl codebook
- the value of the first precoding matrix indication information ⁇ , ⁇ ..., ⁇ corresponds to the original! ⁇ ! ⁇
- the codebook index in the codebook / 2 corresponds to the original
- the value of the first precoding matrix indication information ⁇ , ⁇ ..., ⁇ corresponds to the original! ⁇ ! ⁇ ? Codebook index 2 in the codebook
- the value of the second precoding matrix indication information ⁇ e ⁇ ' 1 ⁇ corresponds to the codebook index 12 in the original Rank 2 codebook; or
- the value of the first precoding matrix indication information ⁇ , ⁇ ..., ⁇ corresponds to the original! ⁇ ! ⁇ ? Codebook The codebook index in / 2 ”, the value of the second precoding matrix indication information i2 corresponds to the original
- the codebook index in the Rank2 codebook is 4 + i 2 ; or,
- the value of the first precoding matrix indication information G ⁇ , 1 , . . . , ⁇ corresponds to the codebook index 2 in the original Rank 2 codebook.
- the value 0 ' 1 ⁇ of the second precoding matrix indication information corresponds to the original Rank 2 codebook.
- the value of the first precoding matrix indication information G ⁇ , 1 , . . . , ⁇ corresponds to the codebook index / 2 ′′ in the original Rank 2 codebook, and the value i2 of the second precoding matrix indication information corresponds to the original
- the value of the first precoding matrix indication information G ⁇ , 1 , . . . , ⁇ corresponds to the codebook index 2 ⁇ in the original Rank 2 codebook, and the value 0 ' 1 ⁇ of the second precoding matrix indication information corresponds to the original Rank 2 Codebook index 4i 2 ; or,
- Codebook index ⁇ () ; or,
- the codebook index ⁇ 4 ; or,
- the value of the first precoding matrix indication information ⁇ ..., ⁇ should be in the codebook index in the original Rank 2 codebook, and the value of the second precoding matrix indication information ⁇ ⁇ G' 1 ' 2 ' 3 ⁇ corresponds In the original Rank 2 codebook, the codebook index 2i 2 ; or, the value of the first precoding matrix indication information G ⁇ 0 ' 1 '"'' 7 ⁇ corresponds to the original Rank 2 codebook In the codebook index / 2 ′′, the value of the second precoding matrix indication information ⁇ 0 , 1 ) corresponds to the codebook index 5i 2 in the original Rank 2 codebook; or
- the value of the first precoding matrix indication information G ⁇ , 1 , . . . , ⁇ corresponds to the codebook index 2 in the original Rank 2 codebook.
- the value 0 ' 1 ⁇ of the second precoding matrix indication information corresponds to the original Rank 2 codebook.
- the value of the first precoding matrix indication information G ⁇ i , 2 , 3 ⁇ corresponds to the codebook index in the original Rank 3 codebook
- the value of the second precoding matrix indication information ⁇ e ⁇ i , 2 , 3 ⁇ corresponds to The original Rank 3 codebook in the codebook index 4i 2 ; or,
- the value of the first precoding matrix indication information G ⁇ i , 2 , 3 ⁇ corresponds to the codebook index in the original Rank 3 codebook, and the value of the second precoding matrix indication information ⁇ G' 1 ' 2 ' 3 ⁇ corresponds In the original Rank3 codebook, the codebook index is 4i 2 + 1 ; or,
- the value of the first precoding matrix indication information G ⁇ i , 2 , 3 ⁇ corresponds to the codebook index in the original Rank 3 codebook, and the value of the second precoding matrix indication information ⁇ G' 1 ' 2 ' 3 ⁇ corresponds In the original Rank 3 codebook, the codebook index 4i 2 + 2 ; or,
- the value of the first precoding matrix indication information G ⁇ i , 2 , 3 ⁇ corresponds to the codebook index in the original Rank 3 codebook, and the value of the second precoding matrix indication information ⁇ G' 1 ' 2 ' 3 ⁇ corresponds In the original Rank 3 codebook, the codebook index is 4 + 3 ; or,
- the value of the first precoding matrix indication information G ⁇ 0 ' 1 ⁇ corresponds to the codebook index / 2 ′′ in the original Rank 3 codebook
- the value of the second precoding matrix indication information ⁇ ⁇ 0 , 1 , . . . corresponds to original Rank 3 codebook in the codebook index 4 ' ⁇ / 2 ” + mQd 2 ); or,
- the value G ⁇ 0 ' 1 ⁇ of the first precoding matrix indication information corresponds to the value of the codebook index second precoding matrix indication information in the original Rank 3 codebook ⁇ ⁇ 0 , 1 , . . . , corresponding to the original Rank 3 code
- the value of the first precoding matrix indication information G ⁇ 0 ' 1 ⁇ corresponds to the codebook index Li ′′ in the original Rank 3 codebook, and the value of the second precoding matrix indication information i2 ⁇ 0 , 1 , . . . corresponds to the original
- the value G ⁇ 0 ' 1 ⁇ of the first precoding matrix indication information corresponds to the value of the codebook index second precoding matrix indication information in the original Rank 3 codebook ⁇ ⁇ 0 , 1 , . . . , corresponding to the original Rank 3 code
- the value G ⁇ 0 ' 1 ⁇ of the first precoding matrix indication information corresponds to the codebook index / 2 ′′ in the original Rank 3 codebook, and the value of the second precoding matrix indication information ⁇ ⁇ 0 , 1 , . . . , corresponds to The original Rank 3 codebook in the codebook index 4 ⁇ LV 2 ” + 3 ⁇ mod2); or,
- the value G ⁇ 0 ' 1 ⁇ of the first precoding matrix indication information corresponds to the value of the codebook index second precoding matrix indication information in the original Rank 3 codebook ⁇ ⁇ ⁇ ..., ⁇ corresponds to the original Rank 3 codebook Codebook index 4 ⁇ ⁇ /2" + 3. mod2); or,
- the value of the first precoding matrix indication information G ⁇ 0 ' 1 ⁇ corresponds to the codebook index in the original Rank 3 codebook"; the value of the second precoding matrix indication information i2 ⁇ 0 , 1 , ..., corresponds to the original
- the value G ⁇ 0 ' 1 ⁇ of the first precoding matrix indication information corresponds to the value of the codebook index second precoding matrix indication information in the original Rank 3 codebook ⁇ ⁇ 0 , 1 , ..., corresponding to the original Rank 3 codebook in the codebook index 1 2 + i ; or,
- the value of the first precoding matrix indication information G ⁇ 0 ' 1 ⁇ corresponds to the codebook index Li ′′ in the original Rank 3 codebook
- the value of the second precoding matrix indication information i2 ⁇ ⁇ , 1 , . . . , ⁇ corresponds to original
- the value G ⁇ 0 ' 1 ⁇ of the first precoding matrix indication information corresponds to the codebook index 2 in the original Rank 3 codebook.
- the value of the second precoding matrix indication information ⁇ ⁇ ⁇ 1 ⁇ 7 ⁇ corresponds to the original Rank 3 code
- the value of the first precoding matrix indication information ⁇ , 1 , 2 , 31 corresponds to the value of the second precoding matrix indication information of the codebook index in the original Rank 3 codebook ⁇ ⁇ ⁇ G' 1 ' 2 ' 3 ⁇ In the original Rank 3 codebook, the codebook index or
- the value of the first precoding matrix indication information ⁇ ⁇ G' 1 ' 2 ' 3 ⁇ corresponds to the codebook index in the original Rank 3 codebook, and the value of the second precoding matrix indication information ⁇ ⁇ G' 1 ' 2 ' 3 ⁇ corresponds to the codebook index + 4 in the original Rank 3 codebook; or,
- the value of the first precoding matrix indication information ii e ⁇ i , 2 , 3 ⁇ corresponds to the codebook index ⁇ in the original Rank 3 codebook, and the value of the second precoding matrix indication information ⁇ G' 1 ' 2 ' 3 ⁇ Corresponds to the original Rank 3 codebook in the codebook index ⁇ + 8 ; or,
- the value of the first precoding matrix indication information ⁇ , 1 , 2 , 31 corresponds to the codebook index ⁇ in the original Rank 3 codebook, and the value of the second precoding matrix indication information i 2 ⁇ G' 1 ' 2 ' 3 ⁇ corresponds to the original 11 ⁇ 21 ⁇ 3 codebook in the codebook index 2 + 12 ; or,
- the value of the first precoding matrix indication information ii ⁇ 0 , 1 , 2 , 31 corresponds to the codebook index in the original Rank 3 codebook, and the value of the second precoding matrix indication information ⁇ ⁇ G' 1 ' 2 ' 3 ⁇ Corresponds to the codebook index 8 ⁇ / 2 ” + mod 2 ) in the original Rank 3 codebook; or,
- the value of the first precoding matrix indication information G ⁇ i , 2 , 3 ⁇ corresponds to the codebook index in the original Rank 3 codebook, and the value of the second precoding matrix indication information ⁇ G' 1 ' 2 ' 3 ⁇ corresponds
- the codebook index is 8 ⁇ / 2 " + mod + 2 ; where L x " represents the largest integer not greater than X, and imod2 represents the remainder obtained by dividing i by 2.
- the value of the first precoding matrix indication information ii ⁇ G' 1 ' 2 ' 3 ⁇ corresponds to the codebook index in the original Rank 4 codebook, and the value of the second precoding matrix indication information ⁇ ⁇ G' 1 ' 2 ' 3 ⁇ corresponds to the codebook index 2l 2 in the original Rank 4 codebook; or,
- the value of the first precoding matrix indication information ii ⁇ G' 1 ' 2 ' 3 ⁇ corresponds to the codebook index in the original Rank 4 codebook, and the value of the second precoding matrix indication information ⁇ ⁇ G' 1 ' 2 ' 3 ⁇ corresponds to the codebook index ⁇ + ⁇ ) in the original Rank4 codebook; or, the value of the first precoding matrix indication information ii ⁇ G' 1 ' 2 ' 3 ⁇ corresponds to the original Rank 4 codebook a codebook index, the value of the second precoding matrix indication information ⁇ e ⁇ i , 2 , 3 ⁇ corresponds to the codebook index 2 + i 2 in the original Rank 4 codebook; or
- the value of the first precoding matrix indication information e ⁇ Q , 1 ⁇ corresponds to the codebook index in the original Rank 4 codebook
- the value of the second precoding matrix indication information ⁇ 0 , 1 , . . . corresponds to the original Rank 4
- the value of the first precoding matrix indication information e ⁇ Q , 1 ⁇ corresponds to the value of the codebook index second precoding matrix indication information in the original Rank 4 codebook ⁇ ⁇ 0 , 1 , . . . , corresponding to the original Rank 4 codebook Medium codebook index ⁇ ; Where Lx" represents the largest integer not greater than x, and imod2 represents the remainder obtained by dividing by 2.
- the value of a first precoding matrix indication information is ⁇ ⁇ ⁇ , ... ⁇ , ⁇ corresponds to the original codebook Rank 2 codebook index 2 second precoding matrix indication information corresponding to the original value E ⁇ Rank 2 codebook in the codebook index 12 ;
- the value of the first precoding matrix indication information e ⁇ Q , 1 ⁇ corresponds to the codebook index 2 in the original Rank 3 codebook
- the value of the second precoding matrix indication information i2 G ⁇ , 1 ,... , ⁇ corresponds to the codebook index 4[i 2 /4j+i 2 in the original Rank 3 codebook
- the value of the first precoding matrix indication information e ⁇ Q , 1 ⁇ corresponds to the original Rank 4 code
- the codebook index of the second precoding matrix indicates that the value of the information ⁇ ⁇ ⁇ G' 1 ⁇ 7 ⁇ corresponds to the codebook index in the original Rank 4 codebook.
- the value of the first precoding matrix indication information and the correspondence between the value of the second precoding matrix indication information and the codebook index sum may be used in the case of non-codebook compression.
- the relationship between the value of the first precoding matrix indication information and the codebook index ⁇ in the case of non-codebook compression is performed.
- the relationship between the value of the second precoding matrix indication information and the codebook index i2 may be expressed as:
- the value of the first precoding matrix indication information ⁇ , 1 , . . . , 151 corresponds to the codebook index in the original Rank 2 codebook
- the value of the second precoding matrix indication information is ⁇ 2 2 3 ⁇ corresponds to the codebook index 2i 2 in the original Ran k 2 codebook
- the value of the second precoding matrix indication information ⁇ G ⁇ ⁇ , 2 , 3 ⁇ corresponds to the codebook index 8 ⁇ /2 " + mod 3 ⁇ 4 + 2 in the original Rank 3 codebook
- the codebook index in the Rank 4 codebook corresponds to the codebook index in the original Rank 4 codebook;
- the value of the first precoding matrix indication information and the second precoding matrix indication information in the case of non-codebook compression may be used.
- the relationship between the value of the second PMI and the codebook index is as shown in Table 15.
- Case 2 When the precoding matrix indication information that is required to be determined by the terminal device is specifically a precoding matrix indication information, the terminal device indicates according to the RI value and the preset precoding matrix.
- the value of the precoding matrix indication information is determined.
- the RI value determined by the terminal device is 1, the corresponding relationship in this case includes:
- imod2 represents the remainder of i divided by 2
- imod4 represents the remainder of i divided by 4.
- Case 3 When the precoding matrix indication information that is required to be determined by the terminal device specifically includes the first precoding matrix indication information and the second precoding matrix indication information, the terminal device according to the RI value and the preset first precoding matrix indication information Determining, by the second precoding matrix indication information, a correspondence between the precoding matrix indication information pair and the codebook index pair formed by the two codebook indexes in the original codebook, determining the first precoding matrix indication information and the first The two precoding matrix indicates the value of the information.
- Case 4 When the precoding matrix indication information that is required to be determined by the terminal device is specifically a precoding matrix indication information, the terminal device indexes the information according to the RI value and the preset precoding matrix and the two codebook indexes in the original codebook. The correspondence between the correspondence relationship with 12 determines the value of the precoding matrix indication information.
- Step S103 The terminal device sends the determined RI value and the value of the precoding matrix indication information to the base station according to the feedback mode.
- the foregoing process is a flow of implementation of a method for transmitting channel state information on a terminal device side according to an embodiment of the present invention.
- an embodiment of the present invention further provides a channel.
- the implementation process of the method for receiving state information on the base station side is as shown in FIG. 2, which specifically includes the following steps:
- Step S201 The base station sends control signaling to the terminal device to notify the terminal device that the channel state information feedback and the feedback mode adopted by the channel state information feedback are needed.
- Step S202 The base station receives the RI and the precoding matrix indication information reported by the terminal device according to the feedback mode.
- Step S203 The base station determines the precoding matrix according to the received RI value and the value of the precoding matrix indication information according to the correspondence between the preset precoding matrix indication information and the codebook index in the original codebook.
- Case 1 When the precoding matrix indication information reported by the terminal device received by the base station specifically includes the first precoding matrix indication information and the second precoding matrix indication information, the base station indicates according to the RI value and the preset first precoding matrix. The correspondence between the information and the second precoding matrix indication information and the two codebook indices in the original codebook determines the precoding matrix.
- the base station determines the precoding matrix according to the values of the first precoding matrix indication information and the second precoding matrix indication information, and the corresponding relationship according to the corresponding relationship in the foregoing step S102 (1) in one is consistent.
- the base station determines the precoding matrix according to the values of the first precoding matrix indication information and the second precoding matrix indication information, and the corresponding relationship according to the foregoing steps
- the base station determines the precoding matrix according to the values of the first precoding matrix indication information and the second precoding matrix indication information, and the corresponding relationship according to the foregoing steps
- the base station When the RI value is 4, the base station according to the first precoding matrix indication information and the second precoding The value of the matrix indication information determines the precoding matrix, the corresponding relationship according to the above steps
- the base station determines the precoding matrix according to the value of the precoding matrix indication information, and the corresponding relationship is consistent with the case described in the foregoing relationship in step S102.
- Case 3 When the precoding matrix indication information reported by the terminal device received by the base station specifically includes the precoding matrix indication information pair composed of the first precoding matrix indication information and the second precoding matrix indication information, the base station according to the RI value and Pre-coding matrix indication information composed of preset first precoding matrix indication information and second precoding matrix indication information
- Case 4 When the precoding matrix indication information reported by the terminal device received by the base station is specifically a precoding matrix, the base station indexes the information according to the RI value and the preset precoding matrix and the two codebook indexes in the original codebook. The correspondence between the correspondences of the sums determines the precoding matrix.
- the codebook needs to be performed for reporting the same subframe and the PUCCH capacity limitation due to the 8-antenna port PMI feedback.
- the definition of the correspondence between the precoding matrix indication information or the precoding matrix indication information pair and the codebook index or the codebook index pair is provided, and the feedback of the channel state information between the base station and the terminal device is implemented. receive.
- the embodiment of the present invention further provides a terminal device, and a schematic structural diagram thereof is shown in FIG. 3, which specifically includes:
- the receiving module 31 is configured to receive control signaling sent by the base station, and the control signaling notifies the terminal device of the feedback mode used for channel state information feedback and channel state information feedback;
- a setting module 32 configured to set a correspondence between the precoding matrix indication information and the codebook index in the original codebook
- a determining module 33 configured to determine an RI value and a precoding matrix in the compressed precoding matrix set, and according to the RI value and the correspondence between the precoding matrix indication information set by the setting module 32 and the codebook index in the original codebook Relationship, determining a value of the corresponding precoding matrix indication information;
- the sending module 34 is configured to send, to the base station, the RI value determined by the determining module 33 and the value of the precoding matrix indication information according to the feedback mode notified by the control signaling received by the receiving module 31.
- the determining module 33 is specifically configured to:
- the first pre-programming set by the setting module 32 Determining, by the code matrix indication information and the correspondence between the second precoding matrix indication information and the two codebook indices ⁇ and 12 in the original codebook, determining values of the first precoding matrix indication information and the second precoding matrix indication information; or ,
- the required precoding matrix indication information specifically includes the first precoding matrix indication information and the second precoding matrix indication information
- an embodiment of the present invention further provides a base station, and a schematic structural diagram thereof is shown in FIG. 4, including:
- a setting module 41 configured to set precoding matrix indication information and a codebook in the original codebook Corresponding relationship
- the sending module 42 is configured to send control signaling to the terminal device, to notify the terminal device that the feedback mode used for channel state information feedback and channel state information feedback is required;
- the receiving module 43 is configured to receive, according to the feedback mode notified by the sending module 42, the value of the RI value and the precoding matrix indication information reported by the terminal device;
- the determining module 44 is configured to: according to the RI value received by the receiving module 43 and the value of the precoding matrix indication information, according to the correspondence between the precoding matrix indication information set by the setting module 41 and the codebook index in the original codebook, Determine the precoding matrix.
- the determining module 44 is specifically configured to:
- the precoding matrix indication information reported by the terminal device received by the receiving module 43 specifically includes the first precoding matrix indication information and the second precoding matrix indication information, according to the RI value and the first precoding matrix set by the setting module 41. Determining a precoding matrix by indicating a correspondence between the indication information and the second precoding matrix indication information and the two codebook indexes in the original codebook; or
- the precoding matrix indication information reported by the terminal device received by the receiving module 43 is specifically a precoding matrix indication information, according to the RI value and the preset set by the setting module 41.
- the precoding matrix indication information reported by the terminal device received by the receiving module 43 specifically includes the precoding matrix indication information pair composed of the first precoding matrix indication information and the second precoding matrix indication information, according to the RI value and the setting module a precoding matrix indication consisting of the first precoding matrix indication information and the second precoding matrix indication information set by 41
- the precoding matrix indication information reported by the terminal device received by the receiving module 43 is specific When it is a precoding matrix, the precoding matrix is determined according to the RI value and the correspondence between the precoding matrix indication information set by the setting module 41 and the correspondence relationship between the two codebook indexes ⁇ and 12 in the original codebook.
- the embodiment of the invention has the following advantages:
- codebook compression is required for reporting the same subframe and PUCCH capacity limitation due to the 8-antenna port PMI feedback. a case, providing a definition of a correspondence between a codebook compressed precoding matrix indication information or a precoding matrix indication information pair and a codebook index or a codebook index pair, and implementing feedback and reception of channel state information between the base station and the terminal device .
- the technical solution of the embodiment of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.).
- a non-volatile storage medium which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.
- a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various implementations of the embodiments of the present invention.
- modules in the apparatus in the implementation scenario may be distributed in the apparatus for implementing the scenario according to the implementation scenario description, or may be correspondingly changed in one or more devices different from the implementation scenario.
- the modules of the above implementation scenarios may be combined into one module, or may be further split into multiple sub-modules.
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US14/002,108 US9048909B2 (en) | 2010-11-08 | 2011-11-08 | Method for transmitting channel state information and device thereof |
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CN112350761B (zh) * | 2015-01-14 | 2023-06-02 | 瑞典爱立信有限公司 | 码本子集限制信令 |
US11923932B2 (en) | 2015-01-14 | 2024-03-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Codebook subset restriction signaling |
US11757499B2 (en) | 2017-08-11 | 2023-09-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Enhanced beam-based codebook subset restriction signaling |
Also Published As
Publication number | Publication date |
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US9048909B2 (en) | 2015-06-02 |
CN102082639B (zh) | 2014-01-29 |
KR20130109167A (ko) | 2013-10-07 |
EP2651066A4 (en) | 2017-07-19 |
KR101716419B1 (ko) | 2017-03-14 |
US20140050276A1 (en) | 2014-02-20 |
CN102082639A (zh) | 2011-06-01 |
JP2014502085A (ja) | 2014-01-23 |
EP2651066A1 (en) | 2013-10-16 |
EP2651066B1 (en) | 2019-05-15 |
JP5945765B2 (ja) | 2016-07-05 |
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