WO2018137208A1 - 信道状态信息的传输方法、接入网设备和终端设备 - Google Patents

信道状态信息的传输方法、接入网设备和终端设备 Download PDF

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Publication number
WO2018137208A1
WO2018137208A1 PCT/CN2017/072683 CN2017072683W WO2018137208A1 WO 2018137208 A1 WO2018137208 A1 WO 2018137208A1 CN 2017072683 W CN2017072683 W CN 2017072683W WO 2018137208 A1 WO2018137208 A1 WO 2018137208A1
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Prior art keywords
column
column vector
pmi
vector
access network
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PCT/CN2017/072683
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English (en)
French (fr)
Inventor
张荻
张瑞齐
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to JP2019560430A priority Critical patent/JP2020506646A/ja
Priority to CN201780081358.3A priority patent/CN110140313B/zh
Priority to PCT/CN2017/072683 priority patent/WO2018137208A1/zh
Priority to EP17894386.6A priority patent/EP3567771B1/en
Publication of WO2018137208A1 publication Critical patent/WO2018137208A1/zh
Priority to US16/521,318 priority patent/US11082108B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0478—Special codebook structures directed to feedback optimisation
    • 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
    • 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
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H04L1/0016—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy involving special memory structures, e.g. look-up tables
    • 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
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H04L1/0022—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy in which mode-switching is influenced by the user
    • 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
    • H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
    • 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
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/14—Arrangements for detecting or preventing errors in the information received by using return channel in which the signals are sent back to the transmitter to be checked ; echo systems
    • 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
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex

Definitions

  • the present application relates to mobile communication technologies, and in particular, to a method for transmitting channel state information, an access network device, and a terminal device.
  • the terminal device uses the reference signal sent by the network device to perform channel estimation to obtain channel state information of the downlink channel (Channel State Information). , referred to as CSI), and feed the CSI back to the network device.
  • CSI channel state information of the downlink channel
  • the terminal device will use a Precoding Martrix Index (PMI), a Rank Index (RI), and a Channel Quality Index (Channel Quality Index).
  • PMI Precoding Martrix Index
  • RI Rank Index
  • Channel Quality Index Channel Quality Index
  • the CQI is sent to the network device, and the network device selects a precoding matrix from the code book agreed with the UE according to the index information, and then precodes the downlink data to be sent by using the precoding matrix to improve downlink communication quality. Therefore, the accuracy of the CSI fed back by the terminal device affects the downlink communication quality, and how to improve the CSI accuracy of the terminal device feedback is particularly important.
  • W 2 is the second level feedback matrix
  • B [p 0 b 0 ,...,p L-1 b L-1 ]
  • p L-1 refers to the amplitude information of the linear weighting value of each column vector in W 1
  • b L-1 is
  • Each column vector in W 1 , c i,j refers to the phase information of the linear weighting value of each column vector in W 1 .
  • the base station after obtaining W index information 1 may be calculated to give a non-constant modulus W 1 matrix (the modulus of each element in the non-constant matrix is not exactly the same), based on the W 2 index information to obtain a constant mode W 2 matrix (the modulus of each element in the matrix of the constant modulus is the same), and finally A non-constant matrix W, such that the base station can precode the downlink data to be transmitted based on the non-constant matrix.
  • the channel state information transmission method, the access network device, and the terminal device provided by the embodiment of the present application are used to solve the problem that when the rank of the precoding matrix determined in the prior art is greater than 2, the terminal device feeds back the CSI to the access network device.
  • the feedback overhead is large, which wastes the technical problem of uplink resources.
  • an embodiment of the present application provides a method for transmitting channel state information, including:
  • the access network device receives the channel state information CSI reported by the terminal device, where the CSI includes a first precoding matrix indicating PMI and a second PMI;
  • W 1 corresponds to the first PMI
  • W 2 corresponds to the second PMI
  • the second PMI is used to indicate a partial column vector of W 2 , the W rank being greater than or equal to 2.
  • the device sends a CSI including the first PMI and the second PMI, and the second PMI is used to indicate the partial column vector of the foregoing W 2 , so that the access network device obtains the precoding matrix W according to the first PMI and the second PMI.
  • the terminal device when the precoding matrix W rank is greater than or equal to 2, the terminal device does not need an index of all the elements W 2 is reported to the access network device only needs to be reported to the access network 2 W indicating device
  • the second PMI of the partial column vector can be used, which effectively saves the overhead of the terminal device feeding back CSI to the access network device, and avoids waste of uplink resources.
  • the precoding matrix W determined by the embodiment of the present application is a non-constant matrix, which greatly improves the precoding matrix compared to the precoding matrix determined by the access network device in the versions before Rel13 and Rel13. Precision.
  • the method further includes:
  • Access network device receiving the CQI reported by the terminal apparatus, the terminal apparatus the CQI is determined according to the orthogonal precoding matrix W o.
  • the method for transmitting channel state information provided by the possible design after determining the precoding matrix W, the terminal device may perform orthogonalization operation on the W to obtain an orthogonal precoding matrix W o , and then according to the orthogonal
  • the precoding matrix W o determines the CQI and reports it to the access network device, which improves the accuracy of the CQI.
  • the method further includes:
  • the access network apparatus performs the orthogonal operation W, the precoding matrix W to obtain orthogonal O; wherein any two column vectors W O orthogonal to each other in the orthogonal operation comprises Schmid Any of the operations of special orthogonalization, zero-forcing algorithm, SVD decomposition, and QR decomposition.
  • a method of transmitting channel state information of the possible design provided, access network device by transmitting operation performing orthogonal to W, the precoding matrix W to obtain orthogonal O, thereby performing the downlink data based on the W O is reduced
  • the downlink data interferes with each other during transmission.
  • the embodiment of the present application provides a method for transmitting channel state information, including:
  • the terminal device to access the network device transmits the channel state information CSI
  • the CSI comprises a first precoding matrix indicator PMI and the second PMI, W 1 corresponding to the first PMI, W 2 corresponding to the first two PMI, PMI is used to indicate the second part of the column vectors W 2, W is the rank is greater than or equal to 2.
  • the method further includes:
  • the terminal apparatus performs orthogonal to W operation, the precoding matrix W to obtain orthogonal O; wherein any two of W O column vectors orthogonal to each other, the quadrature Schmidt orthogonalization operation comprising Any one of the zero-forcing algorithm, SVD decomposition, and QR decomposition;
  • the terminal apparatus determines CQI W o, and send the CQI to the access network device.
  • the second PMI comprises: W 2 in the An index of quantized quantized values for each of the column's column vectors except the first element, where the remainder of W 2 Column vector with The column vector of the column has a preset association relationship, the N is the number of columns of W 2 , and the first element is the An element that remains unchanged in the column's column vector.
  • the second PMI specifically includes: a front of W 2 An index of quantized values of each of the elements in the column vector except the first element, wherein the remainder of W 2 Column vector with the previous The column vector has a preset association.
  • the second PMI further portion for indicating the column vector and W 2 in addition to the association relationship remaining portion of column vector of the column vector.
  • the second PMI comprises: W 2 in the The index of the quantized value of each element other than the first element in the column vector of the column, and the remainder in W 2 Column vector with The relationship of the column vector of the column, the N is the number of columns of W 2 , and the first element is the An element that remains unchanged in the column's column vector.
  • the second PMI specifically includes:
  • the remaining W 2 Column vector with the previous The relationship of the column vector including:
  • the first in W 2 a phase correlation relationship between an element of the column column vector and an element of the kth column column vector, the k is A positive integer in .
  • W 2 is a matrix of M rows and N columns, where M is an even number, the first two of the W.
  • c m,k is the element of the mth row and the kth column in W 2 ,
  • m is a positive integer in [1,M]
  • p is The positive integer in , a 1 , a 2 ...., a m is not exactly the same.
  • a m ⁇ ⁇ 1, -1, jj ⁇ In one possible design, a m ⁇ ⁇ 1, -1, jj ⁇ .
  • phase relationship between the element of the column column vector and the element of the kth column column vector may include: any one of the first association relationship, the second association relationship, the third association relationship, and the fourth association relationship;
  • the first relationship comprises: the first two rows elements and the third column W W 2 column vectors of the same rows of the first column of the first two elements of the vector 2, the W 2 column of the third row of the two rows of element vectors a value obtained by rotating the elements of the last two rows of the first column column vector by 180 degrees;
  • the second association relationship includes: elements of the first row and the fourth row of the third column column vector are the same as elements of the first row and the fourth row of the first column column vector, respectively, the third The elements of the second row and the third row of the column column vector are values obtained by rotating the element phases of the second row and the third row of the first column column vector by 180 degrees, respectively;
  • the third association relationship includes: a first row element of the third column column vector is the same as a first row element of the first column column vector, and a second row element of the third column column vector is a a value after the second row element of the first column column vector is rotated by 90 degrees, and the third row element of the third column column vector is a value after the third row element of the first column column vector is rotated by 180 degrees.
  • the fourth row element of the third column column vector is a value obtained by rotating a fourth row element of the first column column vector by 270 degrees;
  • the fourth association relationship includes: a first row element in the third column column vector is the same as a first row element of the first column column vector, and a second row element of the third column column vector is a second row element of the first column column vector is rotated by 270 degrees, and a third row element of the third column column vector is rotated by 180 degrees of the third row element of the first column column vector a value, the fourth row element of the third column column vector is a value obtained by rotating a fourth row element of the first column column vector by 90 degrees.
  • the phase relationship between the element of the column column vector and the element of the kth column column vector may include: any one of a fifth association relationship, a sixth association relationship, a seventh association relationship, and an eighth association relationship;
  • the fifth association comprising: two rows of the same front element row and the third column W W 2 of the first column vector of the row 2 in the first two lines of a vector element, W fourth column of the first two rows of the column vector 2 and W values of the elements in the second column of the first two lines of the same two elements of the vector, the third column of the two elements of the vector to row after row of the first column vector of two rows of elements rotated 180 degrees after phase
  • the last two rows of elements of the fourth column column vector are values obtained by rotating the phase of the last two rows of the second column column vector by 180 degrees;
  • the sixth association relationship includes: elements of the first row and the fourth row of the third column column vector are the same as elements of the first row and the fourth row of the first column column vector, the fourth column The elements of the first row and the fourth row of the column vector are the same as the elements of the first row and the fourth row of the second column column vector, and the elements of the second row and the third row of the third column column vector are Rotating the elements of the second row and the third row of the first column column vector by a value of 180 degrees, respectively, the elements of the second row and the third row of the fourth column column vector are respectively Element phase of the second and third rows of the two column column vector The value after rotating 180 degrees;
  • the seventh association relationship includes: a first row element of the third column column vector is the same as a first row element of the first column column vector, and a second row element of the third column column vector is a a value after the second row element of the first column column vector is rotated by 90 degrees, and the third row element of the third column column vector is a value after the third row element of the first column column vector is rotated by 180 degrees.
  • the fourth row element of the third column column vector is a value obtained by rotating a fourth row element of the first column column vector by 270 degrees, and the first row element of the fourth column column vector and the first row The first row element of the second column column vector is the same, and the second row element of the fourth column column vector is a value obtained by rotating the second row element of the second column column vector by 90 degrees, the fourth column column
  • the third row element of the vector is a value obtained by rotating a third row element of the second column column vector by 180 degrees, and the fourth row element of the fourth column column vector is a number of the second column column vector The value after the four-row element is rotated by 270 degrees;
  • the eighth association relationship includes: a first row element of the third column column vector is the same as a first row element of the first column column vector, and a second row element of the third column column vector is a The second row element of the first column column vector is rotated by 270 degrees, and the third row element of the third column column vector is a value obtained by rotating the third row element of the first column column vector by 180 degrees.
  • the fourth row element of the third column column vector is a value obtained by rotating a fourth row element of the first column column vector by 90 degrees, and the first row element of the fourth column column vector and the first row The first row element of the second column column vector is the same, and the second row element of the fourth column column vector is a value obtained by rotating the second row element of the second column column vector by 270 degrees, the fourth column column
  • the third row element of the vector is a value obtained by rotating a third row element of the second column column vector by 180 degrees, and the fourth row element of the fourth column column vector is a number of the second column column vector The value after the four elements are rotated 90 degrees.
  • the embodiment of the present application provides an access network device, where the access network device has a function of implementing the transmission method of the channel state information.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the access network device includes multiple function modules or units, and is used to implement a method for transmitting channel state information in any one of the foregoing first aspects.
  • the structure of the access network device may include a processor, a receiver, and a transmitter (or a transceiver).
  • the processor is configured to support the apparatus to perform a corresponding function in a method of transmitting channel state information of any of the above aspects.
  • the transceiver is configured to support communication between the device and other network devices or terminal devices, and may be, for example, a corresponding radio frequency module or a baseband module.
  • the apparatus can also include a memory for coupling with the processor that retains program instructions and data necessary for the access network device to perform the method of transmitting the channel state information.
  • the access network device may be a base station.
  • the embodiment of the present application provides a terminal device, where the terminal device has a function of implementing the transmission method of the channel state information.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the terminal device includes multiple function modules or units, and is used to implement a method for transmitting channel state information in any one of the foregoing first aspects.
  • the structure of the terminal device may include a processor, a receiver, and a transmitter (or a transceiver).
  • the processor is configured to support the apparatus to perform a corresponding function in a method of transmitting channel state information of any of the above aspects.
  • the transceiver is configured to support communication between the device and the access network device, and may be, for example, a corresponding radio frequency module or a baseband module.
  • the device may further include a memory, the storage
  • the program is coupled to a processor that stores program instructions and data necessary for the access network device to perform the transmission method of the channel state information described above.
  • an embodiment of the present application provides a computer storage medium for storing computer software instructions used by the access network device, including a program designed to execute the foregoing first aspect.
  • the embodiment of the present application provides a computer storage medium for storing computer software instructions used by the terminal device, which includes a program designed to execute the foregoing second aspect.
  • an embodiment of the present application provides a computer program product, comprising instructions for causing a computer to perform a function performed by an access network device in the above method when the computer program is executed by a computer.
  • an embodiment of the present application provides a computer program product, comprising: instructions that, when executed by a computer, cause the computer to perform the functions performed by the terminal device in the above method.
  • the present application example when the precoding matrix W rank is greater than or equal to 2, the terminal device does not need an index of all the elements W 2 is reported to the access network device only needs to be reported for indicating access network device 2 W
  • the second PMI of the partial column vector can be used, which effectively saves the overhead of the terminal device feeding back CSI to the access network device, and avoids waste of uplink resources.
  • the precoding matrix W determined by the embodiment of the present application is a non-constant matrix, which greatly improves the precoding matrix compared to the precoding matrix determined by the access network device in the versions of Rel13 and Rel3. Precision.
  • FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application.
  • FIG. 2 is a signaling flowchart of a method for transmitting channel state information according to an embodiment of the present application
  • FIG. 3 is a signaling flowchart of a method for transmitting channel state information according to an embodiment of the present application
  • FIG. 4 is a schematic structural diagram of an embodiment of an access network device according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of an embodiment of a terminal device according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of another embodiment of an access network device according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of another embodiment of a terminal device according to an embodiment of the present disclosure.
  • the method for transmitting channel state information may be applied to the architecture of the communication system shown in FIG. 1.
  • the communication system may be applicable to an FDD system of LTE, and may also be applied to a 4.5G or a future 5G communication system.
  • the embodiment of the present application does not limit the type of the communication system.
  • the communication system includes an access network device and at least one terminal device, and the access network device is located in the access network, and provides network services for the terminal devices covered by the access network device.
  • the access network device may be a base station, or may be another device in the access network that can provide access network services for the terminal device.
  • the base station involved in the present application may refer to a device in the access network that communicates with the wireless terminal through one or more sectors on the air interface.
  • the base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station can be in LTE Evolved base station (NodeB or eNB or e-NodeB, evolutional Node B).
  • the terminal device involved in the present application may be a wireless terminal device or a wired terminal device.
  • the wireless terminal can be a handheld device with wireless connectivity, or other processing device connected to a wireless modem, and a mobile terminal that communicates with one or more core networks via a wireless access network.
  • the wireless terminal can be a mobile phone (or "cellular" phone) and a computer with a mobile terminal.
  • the wireless terminal can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device.
  • the access network device During the data transmission or information transmission process of the access network device and the terminal device, the access network device often needs to know the channel state information (CSI) of the downlink information. Therefore, the access network device sends a reference signal to the terminal device, and the terminal The device uses the reference signal to perform channel estimation, obtains CSI of the downlink channel, and feeds the CSI to the access network device, so that the access network device can perform resource scheduling, data transmission, and the like according to the CSI of the downlink channel. For example, the terminal device sends the PMI to the network device, and the network device can select a corresponding precoding matrix from the codebook according to the PMI, and then precode the downlink data to be sent by using the precoding matrix to improve downlink communication quality. Therefore, the accuracy of the CSI fed back by the terminal device affects the downlink communication quality, and how to improve the CSI accuracy of the terminal device feedback is particularly important.
  • CSI channel state information
  • the W 1 index information carries the amplitude information linear weighted values for each column vector W 1 of the index in the indexes or the power information, and W 1 each column vector index, W index information 2 carries a W 2, in addition to the index of the first element of each element (element), the first element may be an element of the first row in each column of W 2.
  • the base station after receiving the acquired W index information 1, can obtain a non-constant modulus of W 1, the index information W 2 to obtain a constant modulus W based on 2, and finally to obtain a non-constant modulus precoding matrix W, Thereby, the base station can perform precoding based on the downlink data to be transmitted.
  • the matrix is 4 rows
  • the index information of the W 2 that the terminal device feeds back to the base station includes an index of 9 elements, or when the terminal device determines the precoding.
  • the method and apparatus for transmitting channel state information provided by the embodiments of the present application are directed to solving the above technical problems of the prior art.
  • FIG. 2 is a schematic diagram of a signaling flow of a method for transmitting channel state information according to an embodiment of the present disclosure.
  • This embodiment relates to a specific process in which a terminal device sends a second PMI for indicating a partial column vector of W 2 to an access network device to save the terminal device from feeding back an overhead to the access network device.
  • the method includes the following steps:
  • the rank of the pre-coding matrix W is greater than or equal to 2. That is to say, the rank of the precoding matrix W can be the number of columns of W.
  • the rank of W 2 is also greater than or equal to 2, and is equal to the rank of the precoding matrix W.
  • the precoding matrix W is a non-constant matrix.
  • the terminal device in determining the precoding matrix W may be learned portion constituting the column vector W is W 2 between the remaining W 2 is a column vector having a predetermined relationship, optional
  • the preset association relationship may be pre-agreed by the terminal device and the access network device, or may be configured by the network device administrator to the terminal device and the network device. The preset association relationship is not limited in this embodiment.
  • the terminal device to the access network device transmits CSI, the CSI comprises a first PMI and the second PMI, W 1 corresponding to the first PMI, W 2 corresponding to the second PMI, PMI for the second A partial column vector indicating W 2 .
  • the terminal device may send the CSI to the access network device according to the W.
  • the terminal device may be based on a receiver algorithm such as a Minimum Mean-Squared Error Equalizer (MMSE), and according to a throughput, or a Signal to Interference plus Noise Ratio (Signal to Interference plus Noise Ratio, SINR), or other criteria to maximize the transmission channel state information determines the CSI; amplitude of the first PMI information includes an index value for each weighted linear sum of a column index W 1 and W 1 each of the column vectors, or the first PMI may include an index value of the power information for each weighted linear sum of a column vector index W 1 and W 1 each of the column vectors, or the first PMI index W 1 each comprising a column vector.
  • MMSE Minimum Mean-Squared Error Equalizer
  • SINR Signal to Interference plus Noise Ratio
  • the foregoing second PMI may include an index of quantized values of each of the partial column vectors except the first element, to indicate the partial column vector of the W 2 to the access network device.
  • the second PMI may also be a simple identifier information, such as an identifier character, and the partial column vector of the W 2 is notified by the identifier information. How does the second PMI indicate the partial column vector of the W 2 in the embodiment of the present application ? Not limited.
  • the terminal device when the terminal device determines that the precoding matrix W rank is greater than or equal to 2, the terminal device sends only the second PMI for indicating the partial column vector of W 2 to the access network device, without the index of the quantized values after W access network device feedback all elements 2 are quantized, which effectively saves the overhead of CSI feedback terminal device to the access network device, to avoid the waste of uplink resource.
  • S103 The access network device receives the CSI reported by the terminal device.
  • the terminal device comprising a first PMI and the second PMI reported by the CSI access network device, the above-described configuration precoding matrix W W corresponding to the first PMI.
  • the above-described configuration of the precoding matrix W W 2 corresponding to the second PMI "corresponding" herein means that W 1 can be determined according to the first PMI; and W 2 can be determined according to the second PMI.
  • PMI may be selected from according to the first access network device and the terminal device present in the agreed code W 1
  • the access network device may select a format from the codebook agreed with the terminal device that satisfies the partial column vector indicated by the second PMI or satisfies A matrix of the element sizes of the partial column vectors is taken as W 2 ; optionally, when the association between the partial column vector of W 2 and the remaining column vectors of W 2 is agreed between the access network device and the terminal device,
  • the terminal device may send the CSI including the first PMI and the second PMI to the access network device according to the W, and the second The PMI is used to indicate the partial column vector of the foregoing W 2 , and the access network device may determine W 2 from the code book agreed with the terminal device according to the second PMI, and determine from the code book agreed with the terminal device according to the first PMI.
  • W 1 is obtained, and a precoding matrix W is obtained.
  • the terminal device when the precoding matrix W rank is greater than or equal to 2, the terminal device does not need an index of all the elements W 2 is reported to the access network device only needs to be reported to the access network 2 W indicating device
  • the second PMI of the partial column vector can be used, which effectively saves the overhead of the terminal device feeding back CSI to the access network device, and avoids waste of uplink resources.
  • the access network device sends a CSI including a first PMI and a second PMI, and the second PMI is used to indicate a partial column vector of the foregoing W 2 , so that the access network device obtains a precoding matrix according to the first PMI and the second PMI. W.
  • the terminal device when the precoding matrix W rank is greater than or equal to 2, the terminal device does not need an index of all the elements W 2 is reported to the access network device only needs to be reported to the access network 2 W indicating device
  • the second PMI of the partial column vector can be used, which effectively saves the overhead of the terminal device feeding back CSI to the access network device, and avoids waste of uplink resources.
  • the precoding matrix W determined by the embodiment of the present application is a non-constant matrix, which greatly improves the precoding matrix compared with the constant modulus precoding matrix determined by the access network device in the versions before Rel13 and Rel13. The precision of the coding matrix.
  • the implementation manner relates to that the terminal device and the access network device pre-arrange the association relationship between the partial column vector and the remaining column vector in W 2 .
  • the second PMI may include: W 2 of An index of quantized quantized values for each of the column's column vectors except the first element, where the remainder of W 2 Column vector with Column column vector having a predetermined relationship, where N is the number of columns of W 2, W 2 is greater than or equal to the rank 2, i.e., N is a positive integer greater than or equal to 2, the said first element is An element that remains unchanged in the column's column vector.
  • the first element is the above W 2
  • the first row element of each column in the column's column vector, optionally, the first row element can be 1.
  • W 2 is a matrix of N columns, and the number of rows of W 2 is not limited in the present embodiment.
  • the first PMI may include an index W 1 and power information of each of the linear weighted values W 1 column vector of each of the index of a column; the second Two PMIs can be included in W 2 An index of the quantized value of each of the elements of the column in the column vector other than the first element described above, and the remaining of the W 2 determined by the terminal device Column vector and the foregoing
  • the column vector of the column has a preset association. It should be noted that, in this embodiment, the terminal device and the access network device pre-appoint the remaining in W 2 Column vector with this The association between the column vectors of the column.
  • the access network device when the terminal device reports the first PMI and the second PMI to the access network device, the access network device only needs to determine the foregoing according to the content included in the second PMI. a column vector of the column, and then selecting a matrix satisfying the association relationship from the codebook as W 2 according to the above-mentioned association relationship known by the access network device itself. Alternatively, the access network device may also be according to the foregoing. The column vector and association of the column directly construct W 2 .
  • the column vector of the column can be arbitrary The column vector of the column, for example, can be the front The column vector of the column, or the middle The column vector of the column is not limited in this embodiment.
  • the foregoing second PMI may specifically include: a front of W 2 An index of the quantized value of each of the elements other than the first element in the column vector, wherein the remainder of the W 2 Column vector with the previous The column vector has a preset association.
  • the access network device and the terminal device pre-agreed the remaining in W 2 Column vector and front The relationship between the column vectors.
  • Such access network device after receiving the second PMI reported by the terminal device, in accordance with W can before the second PMI indicates 2
  • the index of the quantized quantized value of each of the elements other than the first element in the column vector determines the front of W 2 List the vector and then combine the remaining W 2 in the access network device itself Column vector with the previous The association between the column vectors determines W 2 .
  • the access network device is based on the remaining in W 2 Column vector with the previous The association between the column and column vectors determines the remainder in W 2 Column vector, then combined with the determined front The column vector obtains W 2 , or it may be the access network device according to the determined Column column vector, and the above-mentioned associated relationship, the number of columns selected from the codebook is N, before The column vector and the front indicated by the second PMI The column vector is the same and the rest Column vector with the previous The association of the column vector satisfies the matrix of the association relationship predicted by the access network device as W 2 .
  • the precoding matrix W is a non-constant matrix, which greatly improves the accuracy of the precoding matrix compared to the precoding matrix determined by the access network devices in the versions of Rel13 and Rel13.
  • the terminal device and the access network device pre-agreed the remaining in W 2 Column vector and the second PMI
  • the terminal device reports the information to the access network device including the W 2 a second PMI of an index of quantized quantized values of each element other than the first element in the column vector of the column
  • the access network device may determine W 2 by the association relationship between the second PMI and itself.
  • the precoding matrix W is further determined.
  • the second PMI reported by the terminal device to the access network device does not need to include an index of the quantized value of each element in the W 2 , and only needs to be Contains W 2
  • the index of the quantized value of each element except the first element in the column vector of the column may be indexed, which saves the feedback overhead of the terminal device reporting the CSI to the access network device; in addition, due to the terminal device and the access network The device pre-agreed the foregoing association relationship. Therefore, the terminal device does not need to carry the association relationship in the second PMI, which further saves the feedback overhead of the terminal device and avoids waste of uplink resources.
  • the implementation manner relates to that the terminal device and the access network device do not pre-arrange the association relationship between the partial column vector and the remaining column vector in W 2 .
  • the second PMI in addition to indicating a partial column vector in the W 2 to the access network device, is further used to indicate to the access network device that the partial column vector and the W 2 are divided by the partial column. The association of the remaining column vectors of the vector.
  • the second PMI may include quantized values of each of the partial column vectors except for the first element.
  • the index is used to indicate the partial column vector of the W 2 to the access network device.
  • the second PMI may also be a simple identifier information, such as a logo character, etc., and the part of the W 2 is notified by the identifier information.
  • Column vector optionally, the second PMI may also indicate W 2 to the access network device by using the location information of the element in the known partial column vector at the location of W 2 in combination with the amplitude information and phase information of the known element.
  • the amplitude and phase of the elements in the remaining column vectors, or the second PMI may also pass the corresponding identifier, for example, by 00, the amplitude and phase of an unknown element and a known element in the partial column vector are equal.
  • 01 indicates that an unknown element has the same amplitude as a known element in the partial column vector, and the phase difference is 90 degrees or the like.
  • the column vector indicating how the second PMI DETAILED W 2 and the portion of the column vector W 2 indicates how the remaining columns in association vectors do not defined.
  • the second PMI may specifically include: W 2 in the The index of the quantized value of each element other than the first element in the column vector of the column, and the remainder in W 2 Column vector with The relationship of the column vectors of the columns, where N is the number of columns of W 2 .
  • the terminal apparatus determines the precoding matrix W
  • the first access network device transmits Two PMI
  • the second PMI includes the W 2 The index of the quantized value of each element other than the first element in the column vector of the column, and the remainder in W 2 Column vector with The relationship of the column's column vector.
  • the access network device may be configured according to W 2 in the second PMI.
  • An index of quantized quantized values of each element other than the first element in the column vector of the column determining the W 2
  • the column vector of the column then according to the remaining in W 2 contained in the second PMI Column vector with this The relationship of the column vector of the column, constructing the remainder in W 2 a column vector, which in turn determines W 2 ; alternatively, it may also be that the access network device determines the W 2
  • the access network device determines the W 2
  • select the number of columns from the codebook as N and include the Column column vector, while remaining Column vector with this The relationship between the column vectors of the columns satisfies the matrix of the indication of the second PMI.
  • the specific manner of how the access network device determines the W 2 according to the second PMI is not limited in this embodiment.
  • the access network device side may not only include the association relationship between the column vector and the column vector in different W 2 , and the connection network device selects which association relationship determines W 2 , It is related to the association relationship indicated in the second PMI reported by the terminal device side.
  • the column vector of the column can be arbitrary
  • the column vector of the column for example, can be the front The column vector of the column, or the middle
  • the column vector of the column is not limited in this embodiment.
  • the foregoing second PMI may specifically include: a front of W 2 The index of the quantized value of each of the elements other than the first element in the column vector, and the remainder in W 2 Column vector with the previous The association of the column vectors.
  • the access network device may be based on the W 2 indicated by the second PMI.
  • the index of the quantized value of each of the elements other than the first element in the column vector is determined before W 2 List the vector and then combine the remaining in W 2 as indicated by the second PMI Column vector with the previous The association of the column vectors determines W 2 .
  • the access network device is based on the remaining in W 2 Column vector with the previous The relationship between the column and column vectors determines the remainder in W 2 Column vector, then combined with the determined front The column vector obtains W 2 , or it may also be the access network device according to the determined The column vector and the association relationship indicated by the second PMI, and the number of columns selected from the codebook is N, before The column vector and the front indicated by the second PMI The column vector is the same and the rest Column vector with the previous The relationship of the column vector satisfies the matrix of the association relationship indicated by the second PMI as W 2 .
  • the precoding matrix W is a non-constant matrix, which greatly improves the accuracy of the precoding matrix compared to the precoding matrix determined by the access network devices in the versions of Rel13 and Rel13.
  • the terminal device and the access network device is not a pre-agreed relationship between the column vector W 2 and the remaining portion when a column vector, reported by the terminal device to a second access network device PMI Included in W 2
  • Column vector with The relationship of the column vectors of the columns enables the access network device to determine W 2 through the second PMI, thereby determining the precoding matrix W.
  • the second PMI reported by the terminal device to the access network device does not need to include an index of the quantized value of each element in the W 2 , which saves the saving.
  • the terminal device reports the feedback overhead of the CSI to the access network device.
  • the precoding matrix determined by the access network device is a non-constant matrix, which improves the feedback accuracy of the CSI.
  • the remaining in W 2 Column vector and front The column-column vector has a certain relationship between the columns. Therefore, as a third possible implementation manner of the embodiment of the present application, the embodiment relates to the remaining in the W 2 Column vector and front The specific content of the association between the column vectors.
  • the remainder in W 2 Column vector with the previous The relationship of the column vector including: the first in W 2 a phase relationship between an element of the column vector and an element of the kth column column vector, the k is A positive integer in .
  • the first in W 2 The elements of the column column vector have a phase relationship with the elements of the kth column column vector, for example, when the number of columns of W 2 is 3, the front of W 2 Column before the column vector of two column vectors W 2, W 2 is the remaining
  • the column vector is the third column column vector of W 2 , and the value of k is 1, and the elements of the third column column vector in W 2 have a phase relationship with the elements of the first column column vector.
  • the phase correlation relationship between the elements of the column column vector and the elements of the kth column column vector may be, for example, rotating the phase of an element of the kth column column vector by an angle to obtain the first of W 2 An element of a column vector.
  • W 2 when a matrix W 2 M rows and N columns, where M is an even number, W 2 in the above first
  • the phase relationship between the elements of the column column vector and the elements of the kth column column vector may specifically be: Where c m,k is the element of the mth row and the kth column in W 2 , For the mth line in W 2
  • m is a positive integer in [1,M]
  • p is The positive integer in , a 1 , a 2 ...., a m is not exactly the same.
  • the foregoing c m,k has phase information, Also has phase information, the c m,k and There is a certain phase difference between the two, and the phase difference can be expressed by a coefficient, which is the above a m , for example, when c m,k and When the phase difference is 90 degrees, the a m is equal to j, when c m,k and When the phase difference between them is 180 degrees, the a m is equal to -1.
  • a m value of the embodiment does not restrict the present embodiment, only we need to meet or Yes, where a p is the first in W 2
  • Column The elements of the row and the number in the kth column The coefficient corresponding to the phase difference between the elements of the row.
  • the above a m ⁇ ⁇ 1, -1, jj ⁇ that is, the above c m, k and The phase difference between them can be 90 degrees, 180 degrees, 270 degrees, and 0 degrees.
  • the a m is equal to j
  • the a m is equal to -1
  • the phase difference is 270 degrees
  • the a m is equal to -j
  • the phase difference between the two is 0, the a m is equal to 1.
  • the access network device can determine W 2 according to the second PMI and the pre-agreed association.
  • the terminal device When the terminal device and the access network device do not pre-arrange the above with And the terminal device reports the second PMI to the access network device after the terminal device determines the precoding matrix W by using the reference signal sent by the access network device, where the second PMI includes the foregoing with The relationship also includes the front of W 2
  • the index of the quantized value of each of the elements other than the first element in the column vector is quantized, so the access network device can also determine W 2 in conjunction with the second PMI.
  • the phase correlation relationship between the elements of the column column vector and the elements of the kth column column vector may be any one of the following A, B, C, and D association relationships.
  • the W 2 may be specifically:
  • W element in the first row and the third column of the fourth row of the column vector 2 and W are elements of the first row and the fourth row of the first column vector of the column 2 the same, W 2 column of the third row vector
  • the elements of the second row and the third row are values obtained by rotating the element phases of the second row and the third row of the first column column vector of W 2 by 180 degrees, respectively.
  • the W 2 may be specifically:
  • the third row element of the third column column vector of W 2 is a value obtained by rotating the third row element of the first column column vector of W 2 by 180 degrees.
  • W third column of the fourth row elements of the vector is the value 2 and W of the first column of the fourth row of the elements of the vector 2 rotated 270 degrees.
  • the W 2 may be specifically:
  • the W 2 may be specifically:
  • the W 2 may specifically be:
  • W W element and the first and fourth rows of the third column of the column vector is the same as the first two elements of the first row and column of the fourth row of the column vector 2
  • the fourth column is the column vector W 2 W elements identical elements of the first row and the fourth row of the second column of the first row 2 and a column vector of the fourth row, second row and third row elements of a column vector W 2 respectively in the third column the phase of the first column of the second row elements of a column vector W 2 and the third row a value of 180 degrees of rotation, the elements of the second row and the third row of the column vector in the fourth column of W 2 W 2 respectively
  • the second row and the third row of the second column of the column are rotated by a phase after 180 degrees.
  • the W 2 may be specifically:
  • the second line element W in the third column is the column vector 2 W 2 of the first The value of the second row element of a column of column vectors rotated by 90 degrees, and the third row element of the third column column vector of W 2 is a value obtained by rotating the third row element of the first column column vector of W 2 by 180 degrees.
  • the W 2 may be specifically:
  • the second line element W in the third column is the column vector 2 W 2 of the first
  • the second row element of a column of column vectors is rotated by 270 degrees
  • the third row element of the third column column vector of W 2 is a value obtained by rotating the third row element of the first column column vector of W 2 by 180 degrees.
  • the W 2 may be specifically:
  • the W 2 can be:
  • the terminal device may report to the access network device that the W 2 is included. Before An index of the quantized values of each of the elements in the column vector except the first element, such that the access network device is based on the predicted remaining in W 2 Column vector with the previous Row or column vector relationship association second PMI indicated, it is determined that W 2, W.
  • FIG. 3 is a schematic diagram of a signaling flow of a method for transmitting channel state information according to an embodiment of the present disclosure.
  • This embodiment relates to a specific process in which a terminal device reports a CQI to an access network device and an access network device performs an orthogonalization operation on the obtained precoding matrix W.
  • the method may further include:
  • the terminal device performs an orthogonalization operation on W to obtain an orthogonal precoding matrix W o ; wherein any two column vectors in W o are orthogonal to each other.
  • the terminal apparatus determines CQI W o, and transmits the CQI to the access network device.
  • the above S201 and S202 may not have a strict timing relationship with the foregoing S102.
  • the foregoing S201 and S202 may be performed simultaneously with the foregoing S102, or may be performed before the foregoing S102, which is not in this embodiment. Make a limit.
  • the terminal device may perform an orthogonalization operation on the W to obtain an orthogonal precoding matrix W o .
  • the orthogonality herein may be “completely Orthogonal” can also be "approximate orthogonal”. Then, the terminal device can determine the CQI according to the orthogonal precoding matrix W o and report it to the access network device to improve the accuracy of the CQI.
  • the method for determining the CQI by using the precoding matrix W o can refer to the prior art to use the precoding.
  • the way in which the matrix W determines the CQI is not described here.
  • the foregoing orthogonalization operation may include: one of a Schmidt orthogonalization, a zero-forcing algorithm, an SVD decomposition, and a QR decomposition.
  • the rank of the precoding matrix W when the rank of the precoding matrix W is equal to 2, it may also perform the above orthogonalization operation on the W, and calculate the CQI according to the obtained orthogonal precoding matrix for reporting.
  • the CQI may be reported to the access network device separately during the reporting, and may also be reported to the access network device in the CSI.
  • S203 The access network device receives the CQI reported by the terminal device.
  • the access network device After receiving the CQI reported by the terminal device, the access network device can learn the current downlink channel quality according to the CQI, and then perform downlink data according to the CQI and the precoding matrix obtained according to the first PMI and the second PMI. hair.
  • the access network device may perform orthogonalization operations on the W, for example, according to the Schmidt orthogonalization, zero-forcing algorithm, Any one of the SVD decomposition and the QR decomposition performs orthogonality on the W to obtain an orthogonal precoding matrix W o , so that the access network device can perform downlink data transmission according to the orthogonal precoding matrix W o .
  • the access network device can be treated in accordance with the downlink data transmitted directly to the orthogonal precoding matrix W o precoded so as to send the encoded data terminal
  • the terminal device 1 and the terminal device 2 respectively report the first PMI and the second PIM to the access network device, and the access network device according to the received a PMI and a second PMI respectively determine two precoding matrices, wherein the precoding matrix Wa corresponds to the terminal device 1, the precoding matrix Wb corresponds to the terminal device 2, and the access network device can respectively respectively pair the precoding matrix Wa and
  • the precoding matrix Wb performs an orthogonalization operation to obtain an orthogonal precoding matrix Wao corresponding to Wa and an orthogonal precoding matrix Wbo corresponding to Wb, and then the access network device can determine another according to the Wao and Wbo.
  • any two column vectors in the Wco are orthogonal to each other, and then respectively send data to the terminal device 1 and the terminal device 2 according to different column vectors in the Wco Precoding, thereby reducing the mutual interference during the transmission of the downlink data.
  • the terminal device performs an orthogonalization operation on the determined precoding matrix to obtain an orthogonal precoding matrix W o , and then determines a CQI according to the W o and reports the CQI to
  • the access network device improves the accuracy of the CQI, so that the access network device can transmit data more efficiently; in addition, the orthogonalization of the precoding matrix obtained according to the first PMI and the second PMI is performed by the access network device.
  • the operation obtains the orthogonal precoding matrix W o , and then sends data to the terminal device according to the W o and different user scenarios, which reduces mutual interference of downlink data during the transmission process, and improves the efficiency of data transmission.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.
  • FIG. 4 is a schematic structural diagram of an embodiment of an access network device according to an embodiment of the present disclosure. As shown in FIG. 4, the access network device includes a receiving module 11 and a processing module 12.
  • the receiving module 11 is configured to receive channel state information CSI reported by the terminal device, where the CSI includes a first precoding matrix indicating PMI and a second PMI;
  • W 1 corresponds to the first PMI
  • W 2 corresponds to the second PMI
  • the second PMI is used to indicate a partial column vector of W 2 , the W rank being greater than or equal to 2.
  • the receiving module 11 can be implemented by a corresponding receiver or receiver, for example, by using a radio frequency module or a baseband module in the access network device.
  • the processing module 12 can be implemented by a component having a control function, such as a corresponding processor, a micro control unit, or a digital processor.
  • the second PMI comprises: W 2 in the The index of the quantized value of each of the elements of the column's column vector other than the first element, where the remainder of W 2 Column vector with The column vector of the column has a preset association relationship, the N is the number of columns of W 2 , and the first element is the An element that remains unchanged in the column's column vector.
  • the second PMI specifically includes: a front of W 2 An index of the quantized value of each of the elements other than the first element in the column vector, where the remainder in W 2 Column vector with the previous The column vector has a preset association.
  • the second PMI is further configured to indicate an association relationship between the partial column vector and the remaining column vectors of the partial column vector in W 2 .
  • the second PMI includes: in W 2 The index of the quantized value of each element other than the first element in the column vector of the column, and the remainder in W 2 Column vector with The relationship of the column vector of the column, the N is the number of columns of W 2 , and the first element is the An element that remains unchanged in the column's column vector.
  • the second PMI specifically includes:
  • the first in W 2 a phase correlation relationship between an element of the column column vector and an element of the kth column column vector, the k is A positive integer in .
  • c m,k is the element of the mth row and the kth column in W 2 ,
  • m is a positive integer in [1,M]
  • p is The positive integer in , a 1 , a 2 ...., a m is not exactly the same.
  • the processing module 12 for performing a further operation on the orthogonalization W, to obtain a precoding matrix W o orthogonal; wherein W o any two column vectors are orthogonal to each other,
  • the orthogonalization operation includes any one of Schmidt orthogonalization, zero forcing algorithm, SVD decomposition, and QR decomposition.
  • the first PMI index or index information includes a linear power weighted value of each column vector W 1 of the amplitude information, and W 1 a column vector for each index.
  • the access network device provided by the embodiment of the present application may perform the foregoing method embodiments, and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 5 is a schematic structural diagram of an embodiment of a terminal device according to an embodiment of the present disclosure. As shown in FIG. 5, the terminal device includes a receiving module 21, a processing module 22, and a transmitting module 23.
  • the sending module 23 is configured to access network device transmits the channel state information to the CSI, the CSI comprises a first precoding matrix indicator PMI and the second PMI, W 1 corresponding to the first PMI, W 2 corresponding to And in the second PMI, the second PMI is used to indicate a partial column vector of W 2 , and the rank of the W is greater than or equal to 2.
  • the receiving module 21 can be implemented by a corresponding receiver or receiver, for example, by a radio frequency module or a baseband module in the terminal device.
  • the sending module 23 can be implemented by a corresponding transmitter or transmitter, for example by a radio frequency module or a baseband module in the terminal device.
  • the processing module 22 can be implemented by a component having a control function, such as a corresponding processor, a micro control unit, or a digital processor.
  • the second PMI comprises: W 2 in the An index of quantized quantized values for each of the column's column vectors except the first element, where the remainder of W 2 Column vector with The column vector of the column has a preset association relationship, the N is the number of columns of W 2 , and the first element is the An element that remains unchanged in the column's column vector.
  • the second PMI specifically includes: a front of W 2 An index of the quantized value of each of the elements other than the first element in the column vector, where the remainder in W 2 Column vector with the previous The column vector has a preset association.
  • the second PMI is further configured to indicate an association relationship between the partial column vector and the remaining column vectors of the partial column vector in W 2 .
  • the second PMI includes: in W 2 The index of the quantized value of each element other than the first element in the column vector of the column, and the remainder in W 2 Column vector with The relationship of the column vector of the column, the N is the number of columns of W 2 , and the first element is the An element that remains unchanged in the column's column vector.
  • the second PMI specifically includes:
  • the first in W 2 a phase correlation relationship between an element of the column column vector and an element of the kth column column vector, the k is A positive integer in .
  • c m,k is the element of the mth row and the kth column in W 2 ,
  • m is a positive integer in [1,M]
  • p is The positive integer in , a 1 , a 2 ...., a m is not exactly the same.
  • the processing module 22 is further configured to perform an orthogonalization operation on the W, obtain an orthogonal precoding matrix W o , and determine a CQI according to W o ; wherein any two column vectors in the W o are mutually Orthogonalizing, the orthogonalization operation includes any one of Schmidt orthogonalization, zero-forcing algorithm, SVD decomposition, and QR decomposition;
  • the sending module 23 is further configured to send the CQI to the access network device.
  • the first PMI index or index information includes a linear power weighted value of each column vector W 1 of the amplitude information, and W 1 a column vector for each index.
  • the terminal device provided by the embodiment of the present application may perform the foregoing method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.
  • FIG. 6 is a schematic structural diagram of another embodiment of an access network device according to an embodiment of the present disclosure.
  • the network device can include a receiver 31, a processor 32, and a memory 33.
  • Memory 33 may include high speed RAM memory, and may also include non-volatile memory NVM, such as at least one disk memory, in which various programs may be stored for performing various processing functions and implementing the method steps of the present embodiments.
  • the receiver 31 in this embodiment may be a radio frequency module or a baseband module on the access network device.
  • the receiver 31 is configured to receive channel state information CSI reported by the terminal device, where the CSI includes a first precoding matrix indicating PMI and a second PMI;
  • W 1 corresponds to the first PMI
  • W 2 corresponds to the second PMI
  • the second PMI is used to indicate a partial column vector of W 2 , the W rank being greater than or equal to 2.
  • the second PMI comprises: W 2 in the An index of quantized quantized values for each of the column's column vectors except the first element, where the remainder of W 2 Column vector with The column vector of the column has a preset association relationship, the N is the number of columns of W 2 , and the first element is the An element that remains unchanged in the column's column vector.
  • the second PMI specifically includes: a front of W 2 An index of the quantized value of each of the elements other than the first element in the column vector, where the remainder in W 2 Column vector with the previous The column vector has a preset association.
  • the second PMI is further configured to indicate an association relationship between the partial column vector and the remaining column vectors of the partial column vector in W 2 .
  • the second PMI includes: in W 2 The index of the quantized value of each element other than the first element in the column vector of the column, and the remainder in W 2 Column vector with The relationship of the column vector of the column, the N is the number of columns of W 2 , and the first element is the An element that remains unchanged in the column's column vector.
  • the second PMI specifically includes:
  • the first in W 2 a phase correlation relationship between an element of the column column vector and an element of the kth column column vector, the k is A positive integer in .
  • c m,k is the element of the mth row and the kth column in W 2 ,
  • m is a positive integer in [1,M]
  • p is The positive integer in , a 1 , a 2 ...., a m is not exactly the same.
  • the processor 32 for performing a further operation on the orthogonalization W, to obtain a precoding matrix W o orthogonal; wherein W o any two column vectors are orthogonal to each other,
  • the orthogonalization operation includes any one of Schmidt orthogonalization, zero forcing algorithm, SVD decomposition, and QR decomposition.
  • the first PMI index or index information includes a linear power weighted value of each column vector W 1 of the amplitude information, and W 1 a column vector for each index.
  • the access network device provided by the embodiment of the present application may perform the foregoing method embodiments, and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 7 is a schematic structural diagram of another embodiment of a terminal device according to an embodiment of the present disclosure.
  • the terminal device may include a receiver 40, a transmitter 41, a processor 42, and a memory 43.
  • Memory 43 may include high speed RAM memory, and may also include non-volatile memory NVM, such as at least one disk memory, in which various programs may be stored for performing various processing functions and implementing the method steps of the present embodiments.
  • the receiver 40 and the receiver 41 in this embodiment may be a radio frequency module or a baseband module on the terminal device.
  • the transmitter 41 transmits, to the access network apparatus for transmitting channel state information CSI, the CSI comprises a first precoding matrix indicator PMI and the second PMI, W 1 corresponding to the first PMI, W 2 corresponding to And in the second PMI, the second PMI is used to indicate a partial column vector of W 2 , and the rank of the W is greater than or equal to 2.
  • the second PMI comprises: W 2 in the An index of quantized quantized values for each of the column's column vectors except the first element, where the remainder of W 2 Column vector with The column vector of the column has a preset association relationship, the N is the number of columns of W 2 , and the first element is the An element that remains unchanged in the column's column vector.
  • the second PMI specifically includes: a front of W 2 An index of the quantized value of each of the elements other than the first element in the column vector, where the remainder in W 2 Column vector with the previous The column vector has a preset association.
  • the second PMI is further configured to indicate an association relationship between the partial column vector and the remaining column vectors of the partial column vector in W 2 .
  • the second PMI includes: in W 2 The index of the quantized value of each element other than the first element in the column vector of the column, and the remainder in W 2 Column vector with The relationship of the column vector of the column, the N is the number of columns of W 2 , and the first element is the An element that remains unchanged in the column's column vector.
  • the second PMI specifically includes:
  • the first in W 2 a phase correlation relationship between an element of the column column vector and an element of the kth column column vector, the k is A positive integer in .
  • c m,k is the element of the mth row and the kth column in W 2 ,
  • m is a positive integer in [1,M]
  • p is The positive integer in , a 1 , a 2 ...., a m is not exactly the same.
  • the processor 42 is further configured to perform an orthogonalization operation on the W, obtain an orthogonal precoding matrix W o , and determine a CQI according to W o ; wherein any two column vectors in W o are mutually Orthogonalizing, the orthogonalization operation includes any one of Schmidt orthogonalization, zero-forcing algorithm, SVD decomposition, and QR decomposition;
  • the transmitter 41 is further configured to send the CQI to the access network device.
  • the first PMI index or index information includes a linear power weighted value of each column vector W 1 of the amplitude information, and W 1 a column vector for each index.
  • the terminal device provided by the embodiment of the present application may perform the foregoing method embodiments, and the implementation principles and technical effects thereof are similar, and details are not described herein again.
  • the steps of the method or algorithm described in connection with the disclosure of the present application may be implemented in a hardware manner, or may be implemented by a processor executing a software instruction, or may be implemented by a computer program product.
  • the software instructions may be comprised of corresponding software modules that may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable hard disk, CD-ROM, or any other form of storage well known in the art.
  • An exemplary storage medium is coupled to the processor to enable the processor to The storage medium reads information and can write information to the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in the user equipment.
  • the processor and the storage medium may also reside as discrete components in the user equipment.
  • the functions described herein can be implemented in hardware, software, firmware, or any combination thereof.
  • the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a general purpose or special purpose computer.
  • the disclosed systems, devices, and methods may be implemented in other manners without departing from the scope of the present application.
  • the embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined. Or it can be integrated into another system, or some features can be ignored or not executed.
  • the units described as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. .
  • Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without any creative effort.
  • the described systems, devices, and methods, and the schematic diagrams of various embodiments may be combined or integrated with other systems, modules, techniques or methods without departing from the scope of the present application.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in electronic, mechanical or other form.

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Abstract

本申请提供一种信道状态信息的传输方法、接入网设备和终端设备。该方法包括：接入网设备接收终端设备上报的CSI，该CSI包括第一PMI和第二PMI；接入网设备根据第一PMI和第二PMI确定秩大于或者等于2的预编码矩阵W，W满足W＝W1×W2，第二PMI用于指示W2的部分列向量。本实施例的方法有效节省了终端设备反馈CSI的开销。

Description

信道状态信息的传输方法、接入网设备和终端设备 技术领域
本申请涉及移动通信技术，尤其涉及一种信道状态信息的传输方法、接入网设备和终端设备。
背景技术
在长期演进(Long Term Evolution，简称LTE)的频分双工(Frequency Division Duplexing，简称FDD)系统中，终端设备利用网络设备发送的参考信号进行信道估计得到下行信道的信道状态信息(Channel State Information，简称CSI)，并将该CSI反馈给网络设备，例如，终端设备将预编码矩阵索引(Precoding Martrix Index，简称PMI)、秩索引(Rank Index，简称RI)和信道质量索引(Channel Quality Index，简称CQI)发送给网络设备，网络设备根据这些索引信息从与UE约定的码本中选择预编码矩阵，进而利用该预编码矩阵对待发送的下行数据进行预编码，以提高下行通信质量。因此，终端设备反馈的CSI的准确性影响着下行通信质量，如何提高终端设备反馈的CSI精度显得尤为重要。
目前，现有技术在提高终端设备反馈CSI精度时，采用如下方法：终端设备采用两级反馈的机制(W＝W1×W2)向基站反馈CSI，具体的：上述W1是第一级反馈矩阵，W2是第二级反馈矩阵，
Figure PCTCN2017072683-appb-000001
当终端设备确定的预编码矩阵的秩为1时(rank＝1)，
Figure PCTCN2017072683-appb-000002
当终端设备确定的预编码矩阵的秩为2时(rank＝2)，
Figure PCTCN2017072683-appb-000003
其中，B＝[p0b0,…,pL-1bL-1]，pL-1指的是W1中的每一个列向量的线性加权值的幅度信息、bL-1为W1中每一个列向量，ci,j指的是W1中的每一个列向量的线性加权值的相位信息。当终端设备确定了W1矩阵和W2矩阵后，终端设备向基站上报W1的索引信息和W2的索引信息，基站在获取到W1的索引信息后，可以计算得到一个非恒模的W1矩阵(非恒模的矩阵中每一个元素的模不完全相同)，基于W2的索引信息得到一个恒模的W2矩阵(恒模的矩阵中每一个元素的模相同)，最后得到一个非恒模的矩阵W，从而使得基站可以基于该非恒模的矩阵W对待发送的下行数据进行预编码。
但是，上述反馈方式中，当确定的预编码矩阵的秩大于2时，若终端设备继续沿用上述反馈方式，其反馈开销较大，从而造成上行资源的极大浪费。
发明内容
本申请实施例提供的信道状态信息的传输方法、接入网设备和终端设备，用以解决现有技术中当确定的预编码矩阵的秩大于2时，终端设备向接入网设备反馈CSI，其反馈开销较大，从而浪费上行资源的技术问题。
第一方面，本申请实施例提供一种信道状态信息的传输方法，包括：
接入网设备接收终端设备上报的信道状态信息CSI，所述CSI包括第一预编码矩阵指示PMI和第二PMI；
所述接入网设备根据所述第一PMI和第二PMI，确定预编码矩阵W，W满足W＝W1×W2；
W1对应于所述第一PMI，W2对应于所述第二PMI，所述第二PMI用于指示W2的部分列向量，所述W秩大于或者等于2。
上述提供的信道状态信息的传输方法，终端设备在根据接入网设备下发的参考信号确定了秩大于或者等于2的预编码矩阵W(W＝W1×W2)后，向接入网设备发送包含第一PMI和第二PMI的CSI，且该第二PMI用于指示上述W2的部分列向量，使得接入网设备根据该第一PMI和第二PMI得到预编码矩阵W。即本实施例中，当预编码矩阵W的秩大于或者等于2时，终端设备无需向接入网设备上报W2的所有元素的索引，仅需要向接入网设备上报用于指示W2的部分列向量的第二PMI即可，其有效节省了终端设备向接入网设备反馈CSI的开销，避免了上行资源的浪费。另一方面，本申请实施例所确定的预编码矩阵W为非恒模矩阵，相较于Rel13和Rel13之前的版本中接入网设备所确定的预编码矩阵，其大大提高了预编码矩阵的精度。
在一种可能的设计中，所述方法还包括：
接入网设备接收终端设备上报的CQI，所述CQI为所述终端设备根据正交的预编码矩阵Wo确定的。
该可能的设计所提供的信道状态信息的传输方法，终端设备在确定了预编码矩阵W后，可以对该W执行正交化操作，得到正交的预编码矩阵Wo，然后根据该正交的预编码矩阵Wo确定出CQI，上报给接入网设备，提高了CQI的精度。
在一种可能的设计中，所述方法还包括：
所述接入网设备对所述W执行正交化操作，得到正交的预编码矩阵Wo；其中，Wo中的任意两个列向量彼此正交，所述正交化操作包括施密特正交化、迫零算法、SVD分解、QR分解中的任一个操作。
该可能的设计所提供的信道状态信息的传输方法，接入网设备通过对W执行正交化操作，得到正交的预编码矩阵Wo，从而根据该Wo进行下行数据的发送，降低了发送过程中下行数据的互相干扰。
第二方面，本申请实施例提供一种信道状态信息的传输方法，包括：
终端设备根据接入网设备下发的参考信号确定预编码矩阵W，W满足W＝W1×W2；
所述终端设备向所述接入网设备发送信道状态信息CSI，所述CSI包括第一预编码矩阵指示PMI和第二PMI，W1对应于所述第一PMI，W2对应于所述第二PMI，所述第二PMI用于指示W2的部分列向量，所述W的秩大于或者等于2。
在一种可能的设计中，所述方法还包括：
所述终端设备对W执行正交化操作，得到正交的预编码矩阵Wo；其中，Wo中的任意两个列向量彼此正交，所述正交化操作包括施密特正交化、迫零算法、SVD分解、QR分解中的任一个操作；
所述终端设备根据Wo确定CQI，并将所述CQI发送给所述接入网设备。
上述第二方面以及第二方面的各可能的设计所提供的信道状态信息的传输方法，其有益效果可以参见上述第一方面以及第一方面的各可能的设计的技术效果，在此不再赘述。
结合上述第一方面和第二方面，在一种可能的设计中，所述第二PMI包括：W2中的
Figure PCTCN2017072683-appb-000004
列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
Figure PCTCN2017072683-appb-000005
个列向量与所述
Figure PCTCN2017072683-appb-000006
列的列向量具有预设的关联关系，所述N为W2的列数，所述第一元素为所述
Figure PCTCN2017072683-appb-000007
列的列向量中保持不变的元素。
在一种可能的设计中，所述第二PMI具体包括：W2的前
Figure PCTCN2017072683-appb-000008
列列向量中除所述第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
Figure PCTCN2017072683-appb-000009
个列向量与所述前
Figure PCTCN2017072683-appb-000010
列列向量具有预设的关联关系。
在一种可能的设计中，所述第二PMI还用于指示所述部分列向量与W2中除所述部分列向量的剩余列向量的关联关系。
在一种可能的设计中，所述第二PMI包括：W2中的
Figure PCTCN2017072683-appb-000011
列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，以及，W2中的剩余
Figure PCTCN2017072683-appb-000012
个列向量与所述
Figure PCTCN2017072683-appb-000013
列的列向量的关系，所述N为W2的列数，所述第一元素为所述
Figure PCTCN2017072683-appb-000014
列的列向量中保持不变的元素。
在一种可能的设计中，所述第二PMI具体包括：
W2的前
Figure PCTCN2017072683-appb-000015
列列向量中除所述第一元素外的其他每个元素被量化后的量化值的索引，以及W2中的剩余
Figure PCTCN2017072683-appb-000016
个列向量与所述前
Figure PCTCN2017072683-appb-000017
列列向量的关联关系。
在一种可能的设计中，所述W2中的剩余
Figure PCTCN2017072683-appb-000018
个列向量与所述前
Figure PCTCN2017072683-appb-000019
列列向量的关联关系，具体包括：
W2中的第
Figure PCTCN2017072683-appb-000020
列列向量的元素与第k列列向量的元素之间的相位关联关系，所述k为
Figure PCTCN2017072683-appb-000021
中的正整数。
在一种可能的设计中，W2为M行N列的矩阵,其中M是偶数，则所述W2中的第
Figure PCTCN2017072683-appb-000022
列列向量的元素与第k列列向量的元素之间的相位关联关系，具体包括：
Figure PCTCN2017072683-appb-000023
其中，cm,k为W2中第m行第k列的元素，
Figure PCTCN2017072683-appb-000024
为W2中第m行第
Figure PCTCN2017072683-appb-000025
列的元素，
Figure PCTCN2017072683-appb-000026
m为[1,M]中的正整数，p为
Figure PCTCN2017072683-appb-000027
中的正整数，a1,a2....,am不完全相同。
在一种可能的设计中，am∈{1,-1,j-j}。
在一种可能的设计中，当N＝3时，所述W2中的第
Figure PCTCN2017072683-appb-000028
列列向量的元素与第k列列向量的元素之间的相位关联关系，可以包括：第一关联关系、第二关联关系、第三关联关系和第四关联关系中的任一个；其中，
所述第一关联关系包括：W2的第三列列向量的前两行元素与W2的第一列列向量的前两行元素相同，W2的第三列列向量的后两行元素为将所述第一列列向量的后两行元素相位旋转180度后的值；
所述第二关联关系包括：所述第三列列向量的第一行和第四行的元素分别与所述第一列列向量的第一行和第四行的元素相同，所述第三列列向量的第二行和第三行的元素为分别将所述第一列列向量的第二行和第三行的元素相位旋转180度后的值；
所述第三关联关系包括：所述第三列列向量的第一行元素与所述第一列列向量的第一行元素相同，所述第三列列向量的第二行元素为将所述第一列列向量的第二行元素旋转90度后的值，所述第三列列向量的第三行元素为将所述第一列列向量的第三行元素旋转180度后的值，所述第三列列向量的第四行元素为将所述第一列列向量的第四行元素旋转270度后的值；
所述第四关联关系包括：所述第三列列向量中的第一行元素与所述第一列列向量的第一行元素相同，所述第三列列向量的第二行元素为将所述第一列列向量的第二行元素旋转270度后的值，所述第三列列向量的第三行元素为将所述第一列列向量的第三行元素旋转180度后的值，所述第三列列向量的第四行元素为将所述第一列列向量的第四行元素旋转90度后的值。
在一种可能的设计中，当N＝4时，所述W2中的第
Figure PCTCN2017072683-appb-000029
列列向量的元素与第k列列向量的元素之间的相位关联关系，可以包括：第五关联关系、第六关联关系、第七关联关系和第八关联关系中的任一个；其中，
所述第五关联关系包括：W2的第三列列向量的前两行元素与W2的第一列列向量中的前两行元素相同，W2的第四列列向量的前两行元素与W2的第二列列向量的前两行元素相同，所述第三列列向量的后两行元素为将所述第一列列向量的后两行元素相位旋转180度后的值，所述第四列列向量的后两行元素为将所述第二列列向量的后两行元素相位旋转180度后的值；
所述第六关联关系包括：所述第三列列向量的第一行和第四行的元素与所述第一列列向量的第一行和第四行的元素相同，所述第四列列向量的第一行和第四行的元素与所述第二列列向量的第一行和第四行的元素相同，所述第三列列向量的第二行和第三行的元素为分别将所述第一列列向量的第二行和第三行的元素相位旋转180度后的值，所述第四列列向量的第二行和第三行的元素为分别将所述第二列列向量的第二行和第三行的元素相位 旋转180度后的值；
所述第七关联关系包括：所述第三列列向量的第一行元素与所述第一列列向量的第一行元素相同，所述第三列列向量的第二行元素为将所述第一列列向量的第二行元素旋转90度后的值，所述第三列列向量的第三行元素为将所述第一列列向量的第三行元素旋转180度后的值，所述第三列列向量的第四行元素为将所述第一列列向量的第四行元素旋转270度后的值，所述第四列列向量的第一行元素与所述第二列列向量的第一行元素相同，所述第四列列向量的第二行元素为将所述第二列列向量的第二行元素旋转90度后的值，所述第四列列向量的第三行元素为将所述第二列列向量的第三行元素旋转180度后的值，所述第四列列向量的第四行元素为将所述第二列列向量的第四行元素旋转270度后的值；
所述第八关联关系包括：所述第三列列向量的第一行元素与所述第一列列向量的第一行元素相同，所述第三列列向量的第二行元素为将所述第一列列向量的第二行元素旋转270度后的值，所述第三列列向量的第三行元素为将所述第一列列向量的第三行元素旋转180度后的值，所述第三列列向量的第四行元素为将所述第一列列向量的第四行元素旋转90度后的值，所述第四列列向量的第一行元素与所述第二列列向量的第一行元素相同，所述第四列列向量的第二行元素为将所述第二列列向量的第二行元素旋转270度后的值，所述第四列列向量的第三行元素为将所述第二列列向量的第三行元素旋转180度后的值，所述第四列列向量的第四行元素为将所述第二列列向量的第四行元素旋转90度后的值。
第三方面，为了实现上述第一方面的信道状态信息的传输方法，本申请实施例提供了一种接入网设备，该接入网设备具有实现上述信道状态信息的传输方法的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在第三方面的一种可能的实现方式中，该接入网设备包括多个功能模块或单元，用于实现上述第一方面中的任一种信道状态信息的传输方法。
在第三方面的另一种可能的实现方式中，该接入网设备的结构中可以包括处理器、接收器和发送器(或者收发器)。所述处理器被配置为支持该装置执行上述第一方面中任一种信道状态信息的传输方法中相应的功能。所述收发器用于支持该装置与其他网络设备或者终端设备之间的通信，例如可以为相应的射频模块或者基带模块。该装置中还可以包括存储器，所述存储器用于与处理器耦合，其保存该接入网设备执行上述信道状态信息的传输方法必要的程序指令和数据。可选的，该接入网设备可以为基站。
第四方面，为了实现上述第二方面的信道状态信息的传输方法，本申请实施例提供了一种终端设备，该终端设备具有实现上述信道状态信息的传输方法的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
在第四方面的一种可能的实现方式中，该终端设备包括多个功能模块或单元，用于实现上述第一方面中的任一种信道状态信息的传输方法。
在第四方面的另一种可能的实现方式中，该终端设备的结构中可以包括处理器、接收器和发送器(或者收发器)。所述处理器被配置为支持该装置执行上述第一方面中任一种信道状态信息的传输方法中相应的功能。所述收发器用于支持该装置与接入网设备之间的通信，例如可以为相应的射频模块或者基带模块。该装置中还可以包括存储器，所述存储 器用于与处理器耦合，其保存该接入网设备执行上述信道状态信息的传输方法必要的程序指令和数据。
第五方面，本申请实施例提供了一种计算机存储介质，用于储存为上述接入网设备所用的计算机软件指令，其包含用于执行上述第一方面所设计的程序。
第六方面，本申请实施例提供了一种计算机存储介质，用于储存为上述终端设备所用的计算机软件指令，其包含用于执行上述第二方面所设计的程序。
第七方面，本申请实施例提供一种计算机程序产品，其包含指令，当所述计算机程序被计算机所执行时，该指令使得计算机执行上述方法中接入网设备所执行的功能。
第八方面，本申请实施例提供一种计算机程序产品，其包含指令，当所述计算机程序被计算机所执行时，该指令使得计算机执行上述方法中终端设备所执行的功能。
相较于现有技术，本申请实施例所提供的方法和设备，终端设备在根据接入网设备下发的参考信号确定了秩大于或者等于2的预编码矩阵W(W＝W1×W2)后，向接入网设备发送包含第一PMI和第二PMI的CSI，且该第二PMI用于指示上述W2的部分列向量，使得接入网设备根据该第一PMI和第二PMI得到预编码矩阵W。即本申请实施例中，当预编码矩阵W的秩大于或者等于2时，终端设备无需向接入网设备上报W2的所有元素的索引，仅需要向接入网设备上报用于指示W2的部分列向量的第二PMI即可，其有效节省了终端设备向接入网设备反馈CSI的开销，避免了上行资源的浪费。另一方面，本申请实施例所确定的预编码矩阵W为非恒模矩阵，相较于Rel13以及Rel3之前的版本中接入网设备所确定的预编码矩阵，其大大提高了预编码矩阵的精度。
附图说明
图1为本申请实施例提供的通信系统架构示意图；
图2为本申请实施例提供的信道状态信息的传输方法的信令流程图；
图3为本申请实施例提供的信道状态信息的传输方法的信令流程图；
图4为本申请实施例提供的接入网设备一实施例的结构示意图；
图5为本申请实施例提供的终端设备一实施例的结构示意图；
图6为本申请实施例提供的接入网设备另一实施例的结构示意图；
图7为本申请实施例提供的终端设备另一实施例的结构示意图。
具体实施方式
本申请实施例涉及的信道状态信息的传输方法，可以适用于图1所示的通信系统架构示意图，该通信系统可以适用于LTE的FDD系统，还可以适用于4.5G或者未来的5G通信系统，本申请实施例对该通信系统的类型并不做限定。如图1所示，该通信系统包括接入网设备和至少一个终端设备，该接入网设备位于接入网中，为其所覆盖的终端设备提供网络服务。可选的，该接入网设备可以为基站，还可以位于接入网中能够为终端设备提供接入网服务的其他设备。可选的，本申请中涉及的基站可以是指接入网中在空中接口上通过一个或多个扇区与无线终端通信的设备。基站可用于将收到的空中帧与IP分组进行相互转换，作为无线终端与接入网的其余部分之间的路由器，其中接入网的其余部分可包括网际协议(IP)网络。基站还可协调对空中接口的属性管理。例如，基站可以是LTE中的 演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)。
另外，本申请中涉及的终端设备，可以是无线终端设备也可以是有线终端设备。无线终端可以是具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备，经无线接入网与一个或多个核心网进行通信的移动终端。例如，无线终端可以是移动电话(或称为“蜂窝”电话)和具有移动终端的计算机。又如，无线终端也可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置。
在上述接入网设备和终端设备进行数据传输或者信息传输过程中，接入网设备往往需要获知下行信息的信道状态信息(CSI)，因此，接入网设备会向终端设备发送参考信号，终端设备利用该参考信号进行信道估计，得到下行信道的CSI，并将该CSI反馈给接入网设备，从而使得接入网设备可以根据该下行信道的CSI进行资源的调度和数据传输等。例如，终端设备将PMI发送给网络设备，网络设备根据该PMI可以从码本中选择对应的预编码矩阵，进而利用该预编码矩阵对待发送的下行数据进行预编码，以提高下行通信质量。因此，终端设备反馈的CSI的准确性影响着下行通信质量，如何提高终端设备反馈的CSI精度显得尤为重要。
目前，现有技术在提高终端设备反馈CSI精度时，采用如下方法：终端设备采用两级反馈的机制(W＝W1×W2)向基站反馈CSI，当终端设备在接收到接入网设备下发的参考信号后，终端设备基于该参考信号确定第一级反馈矩阵W1和第二级反馈矩阵W2，然后终端设备结合该第一级反馈矩阵W1和第二级反馈矩阵W2向接入网设备发送W1的索引信息和W2的索引信息。该W1索引信息中携带了W1中的每一个列向量的线性加权值的幅度信息的索引或者功率信息的索引、以及W1中每一个列向量的索引，W2的索引信息中携带了W2中除第一元素外的每一个元素(element)的索引，该第一元素可以为W2中每一列的第一行的元素。基站在接收到获取到W1的索引信息后，可以获取到一个非恒模的W1，基于W2的索引信息得到一个恒模的W2，最后得到一个非恒模的预编码矩阵W，从而使得基站可以基于该W对待发送的下行数据进行预编码。
但是，上述CSI的反馈方法，当终端设备确定Rank>2时，若终端设备依然沿用上述反馈方式，其反馈开销依然较大，例如，当终端设备确定预编码矩阵的rank＝3，且预编码矩阵为4行时，则当W2的第一行元素均为第一元素时，终端设备向基站反馈的W2的索引信息中就包含了9个元素的索引，或者，当终端设备确定预编码矩阵的rank＝4，且预编码矩阵为4行时，则当W2的第一行元素均为第一元素时，终端设备向基站反馈的W2的索引信息中就包含了12个元素的索引，由此可知，终端设备的反馈开销随着预编码矩阵的rank的增加而不断增大，从而造成上行资源的极大浪费。
本申请实施例所提供的信道状态信息的传输方法和装置，旨在解决现有技术的如上技术问题。
下面以具体地实施例对本申请的技术方案进行详细说明。下面这几个具体的实施例可以相互结合，对于相同或相似的概念或过程可能在某些实施例中不再赘述。
图2为本申请实施例提供的信道状态信息的传输方法的信令流程示意图。本实施例涉及的是终端设备通过向接入网设备发送用于指示W2的部分列向量的第二PMI，以节省终端设备向接入网设备反馈开销的具体过程。如图2所示，该方法包括如下步骤：
S101、终端设备根据接入网设备下发的参考信号确定预编码矩阵W，W满足 W＝W1×W2，W的秩大于或者等于2。
具体的，当接入网设备需要获取向终端设备发送下行数据时，接入网设备预先向终端设备发送参考信号，终端设备可以根据该参考信号确定预编码矩阵W，W满足W＝W1×W2，其中，W1为第一级反馈矩阵，W2为第二级反馈矩阵，本申请实施例中，该预编码矩阵W的秩大于或者等于2。也就是说，预编码矩阵W的秩可以为W的列数。相应的，本申请实施例中，W2的秩也大于或者等于2，并且与该预编码矩阵W的秩相等。需要说明的是，本实施例中，该预编码矩阵W为非恒模矩阵。
另外，终端设备根据参考信号确定预编码矩阵W的具体过程可以参见现有技术的描述，在此不再赘述。可选的，本实施例中，终端设备在确定预编码矩阵W时，可以获知构成该W的W2的部分列向量与W2的剩余列向量之间具有预设的关联关系，可选的，该预设的关联关系可以是终端设备和接入网设备预先约定的，或者是网络设备管理员配置给终端设备和网络设备的，本实施例对该预设的关联关系并不做限定。
S102：终端设备向接入网设备发送CSI，该CSI包括第一PMI和第二PMI，W1对应于所述第一PMI，W2对应于所述第二PMI，所述第二PMI用于指示W2的部分列向量。
具体的，当终端设备确定预编码矩阵W后，终端设备可以根据该W向接入网设备发送CSI。可选的，终端设备可以根据最小均方误差(Minimum Mean-Squared Error Equalizer，简称MMSE)等接收机算法，并按照吞吐量最大化，或者信号与干扰加噪声比(Signal to Interference plus Noise Ratio，SINR)最大化或者其它准则确定发送信道状态信息CSI；该第一PMI包括W1中的每一个列向量的线性加权值的幅度信息的索引和W1中每一个列向量的索引，或者，该第一PMI可以包括W1中的每一个列向量的线性加权值的功率信息的索引和W1中每一个列向量的索引，或者，第一PMI包括W1中每一个列向量的索引。可选的，上述第二PMI可以包括该部分列向量中除第一元素外的其他每一个元素被量化后的量化值的索引，以向接入网设备指示该W2的部分列向量，可选的，该第二PMI也可以为一个单纯的标识信息，例如一个标识字符等，通过该标识信息告知W2的部分列向量，本申请实施例对第二PMI如何指示W2的部分列向量并不做限定。
需要说明的是，本实施例中，终端设备在确定预编码矩阵W秩大于或者等于2时，终端设备仅向接入网设备发送用于指示W2的部分列向量的第二PMI，无需向接入网设备反馈W2的所有元素被量化后的量化值的索引，其有效节省了终端设备向接入网设备反馈CSI的开销，避免了上行资源的浪费。
S103：接入网设备接收终端设备上报的CSI。
S104：接入网设备根据所述第一PMI和第二PMI，确定预编码矩阵W，W满足W＝W1×W2。
具体的，终端设备向接入网设备上报的CSI包括第一PMI和第二PMI，上述构成预编码矩阵W的W1对应于该第一PMI，上述构成预编码矩阵W的W2对应于该第二PMI，这里的“对应”指的是根据该第一PMI，可以确定W1；根据第二PMI，可以确定W2。例如，当接入网设备接收到第一PMI时，可以根据该第一PMI从接入网设备与终端设备约定的码本中选择出W1，当接入网设备接收到第二PMI时，由于第二PMI指示了W2的部分列向量，因此，可选的，接入网设备可以从与终端设备约定的码本中选择一个满足该第二PMI所指示的部分列向量的格式或者满足部分列向量的元素大小的一个 矩阵作为W2；可选的，当接入网设备和终端设备之间约定了W2的部分列向量与W2的剩余列向量之间的关联关系时，接入网设备可以在接收到该第二PMI后，根据该第二PMI获知该W2的部分列向量，然后根据该部分列向量和之前所约定的关联关系构造出一个W2矩阵。基于此，接入网设备就可以根据上述W1和W2以及W＝W1×W2，确定预编码矩阵W。
由上述描述可知，终端设备在确定了预编码矩阵W(W＝W1×W2)之后，可以根据该W向接入网设备发送包含第一PMI和第二PMI的CSI，且该第二PMI用于指示上述W2的部分列向量，接入网设备根据第二PMI可以从与终端设备约定的码本中确定出W2，并根据第一PMI从与终端设备约定的码本中确定出W1，进而得到预编码矩阵W。即本实施例中，当预编码矩阵W的秩大于或者等于2时，终端设备无需向接入网设备上报W2的所有元素的索引，仅需要向接入网设备上报用于指示W2的部分列向量的第二PMI即可，其有效节省了终端设备向接入网设备反馈CSI的开销，避免了上行资源的浪费。
本申请实施例提供的信道状态信息的传输方法，终端设备在根据接入网设备下发的参考信号确定了秩大于或者等于2的预编码矩阵W(W＝W1×W2)后，向接入网设备发送包含第一PMI和第二PMI的CSI，且该第二PMI用于指示上述W2的部分列向量，使得接入网设备根据该第一PMI和第二PMI得到预编码矩阵W。即本实施例中，当预编码矩阵W的秩大于或者等于2时，终端设备无需向接入网设备上报W2的所有元素的索引，仅需要向接入网设备上报用于指示W2的部分列向量的第二PMI即可，其有效节省了终端设备向接入网设备反馈CSI的开销，避免了上行资源的浪费。另一方面，本申请实施例所确定的预编码矩阵W为非恒模矩阵，相较于Rel13以及Rel13之前的版本中接入网设备所确定的恒模的预编码矩阵，其大大提高了预编码矩阵的精度。
可选的，作为本申请实施例的第一种可能的实施方式，本实施方式涉及的是终端设备与接入网设备预先约定W2中的部分列向量与剩余列向量之间的关联关系，终端设备在该约定的关联关系下，向接入网设备发送的第二PMI的具体内容。在上述实施例的基础上，上述第二PMI可以包括：W2中的
Figure PCTCN2017072683-appb-000030
列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
Figure PCTCN2017072683-appb-000031
个列向量与所述
Figure PCTCN2017072683-appb-000032
列的列向量具有预设的关联关系，所述N为W2的列数，W2的秩大于或者等于2，即N为大于或者等于2的正整数，所述第一元素为所述
Figure PCTCN2017072683-appb-000033
列的列向量中保持不变的元素。可选的，该第一元素为W2的上述
Figure PCTCN2017072683-appb-000034
列的列向量中每一列的第一行元素，可选的，该第一行元素可以为1。
具体的，本实施方式中，设W2为N列的矩阵，本实施方式对W2的行数并不做限定。终端设备在确定预编码矩阵W后，结合该W向接入网设备发送第一PMI和第二PMI，其中，该第一PMI包括W1中的每一个列向量的线性加权值的幅度信息的索引和W1 中每一个列向量的索引，或者，该第一PMI可以包括W1中的每一个列向量的线性加权值的功率信息的索引和W1中每一个列向量的索引；该第二PMI可以包括W2中的
Figure PCTCN2017072683-appb-000035
列的列向量中除上述第一元素外的其他每个元素被量化后的量化值的索引，并且，终端设备所确定的W2中，剩余的
Figure PCTCN2017072683-appb-000036
个列向量与前述
Figure PCTCN2017072683-appb-000037
列的列向量具有预设的关联关系。需要说明的是，本实施方式中，终端设备和接入网设备预先约定了W2中的剩余
Figure PCTCN2017072683-appb-000038
个列向量与该
Figure PCTCN2017072683-appb-000039
列的列向量之间的关联关系。因此，当终端设备将该第一PMI和第二PMI上报给接入网设备时，接入网设备仅需要根据第二PMI中所包含的内容确定上述
Figure PCTCN2017072683-appb-000040
列的列向量，然后结合接入网设备本身所知道的上述关联关系从码本中选择满足该关联关系的矩阵作为W2，可选的，还可以是接入网设备根据上述
Figure PCTCN2017072683-appb-000041
列的列向量和关联关系直接构造出W2。
可选的，上述第二PMI所指示的
Figure PCTCN2017072683-appb-000042
列的列向量可以是任意的
Figure PCTCN2017072683-appb-000043
列的列向量，例如可以是前
Figure PCTCN2017072683-appb-000044
列的列向量，或者是中间
Figure PCTCN2017072683-appb-000045
列的列向量，本实施方式对此并不做限定。可选的，上述第二PMI具体可以包括：W2的前
Figure PCTCN2017072683-appb-000046
列列向量中除第一元素外的其他每个元素被量化后的量化值的索引，其中，该W2中的剩余
Figure PCTCN2017072683-appb-000047
个列向量与该前
Figure PCTCN2017072683-appb-000048
列列向量具有预设的关联关系。在该种可选的方式下，接入网设备和终端设备预先约定了W2中的剩余
Figure PCTCN2017072683-appb-000049
个列向量与前
Figure PCTCN2017072683-appb-000050
列列向量之间的关联关系。这样接入网设备在接收到终端设备上报的第二PMI后，可以根据该第二PMI指示的W2的前
Figure PCTCN2017072683-appb-000051
列列向量中除第一元素外的其他每个元素被量化后的量化值的索引确定出W2的前
Figure PCTCN2017072683-appb-000052
列列向量，然后结合接入网设备本身所获知的W2中的剩余
Figure PCTCN2017072683-appb-000053
个列向量与该前
Figure PCTCN2017072683-appb-000054
列列向量之间的关联关系，确定W2。可选的，可以是接入网设备根据W2中的剩余
Figure PCTCN2017072683-appb-000055
个列向量与该前
Figure PCTCN2017072683-appb-000056
列列向量之间的关联关系确定出W2中的剩余
Figure PCTCN2017072683-appb-000057
个列向量，然后结合确定的前
Figure PCTCN2017072683-appb-000058
列列向量得到W2，或者，还可以是接入网设备根据 所确定的前
Figure PCTCN2017072683-appb-000059
列列向量、以及所预知的上述关联关系，从码本中选择列数为N、前
Figure PCTCN2017072683-appb-000060
列列向量与第二PMI所指示的前
Figure PCTCN2017072683-appb-000061
列列向量相同、且剩余
Figure PCTCN2017072683-appb-000062
个列向量与该前
Figure PCTCN2017072683-appb-000063
列列向量的关联关系满足接入网设备所预知的关联关系的矩阵，作为W2。
另一方面，接入网设备根据上述第一PMI从与终端设备约定的码本中选择与该第一PMI对应的矩阵作为W1，因此，接入网设备根据上述W1和W2所得到的预编码矩阵W为非恒模矩阵，相较于Rel13以及Rel13之前的版本中接入网设备所确定的预编码矩阵，其大大提高了预编码矩阵的精度。
上述第一种可能的实施方式，当终端设备与接入网设备预先约定了W2中的剩余
Figure PCTCN2017072683-appb-000064
个列向量与第二PMI所指示的
Figure PCTCN2017072683-appb-000065
列的列向量之间的关联关系时，终端设备向接入网设备上报包括W2中的
Figure PCTCN2017072683-appb-000066
列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引的第二PMI，接入网设备可以通过该第二PMI和本身所获知的上述关联关系确定W2，进而确定预编码矩阵W。该实施方式中，当W2的列数大于或者等于2时，终端设备向接入网设备上报的第二PMI中无需包含该W2中每一个元素被量化后的量化值的索引，仅需要包含W2中的
Figure PCTCN2017072683-appb-000067
列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引即可，节省了终端设备向接入网设备上报CSI的反馈开销；另外，由于终端设备和接入网设备预先约定了上述关联关系，因此，终端设备无需在第二PMI中携带该关联关系，进一步节省了终端设备的反馈开销，避免了上行资源的浪费。
可选的，作为本申请实施例的第二种可能的实施方式，本实施方式涉及的是终端设备与接入网设备没有预先约定W2中的部分列向量与剩余列向量之间的关联关系时，终端设备向接入网设备发送的第二PMI的具体内容。在上述实施例一的基础上，上述第二PMI除了向接入网设备指示W2中的部分列向量，还用于向接入网设备指示该部分列向量与W2中除所述部分列向量的剩余列向量的关联关系。
在该第二种可能的实施方式中，如上述实施例和实施方式中所描述的，该第二PMI可以包括该部分列向量中除第一元素外的其他每一个元素被量化后的量化值的索引，以向接入网设备指示该W2的部分列向量，可选的，该第二PMI也可以为一个单纯的标识信息，例如一个标识字符等，通过该标识信息告知W2的部分列向量；可选的，该第二PMI还可以通过上述已知的部分列向量中元素位于W2的位置并结合该已知元素的幅度信息和相位信息，向接入网设备指示W2的剩余列向量中的元素的幅度和相位，或者，第二PMI还可以通过相应的标识符，例如：通过00表示某一个未知元素与部分列向量中的一个已知元素的幅度和相位均相等，又例如，通过01表示某一个未知元素与部分列向量中的一个已知元素的幅度相等，相位差90度等。本实施方式对第二PMI如何指示的W2的部分列向量以及如何指示的该部分列向量与W2中剩余列向量的关联关系的具体方式并不做限定。
进一步地，结合上述第二种可能的实施方式中，可选的，上述第二PMI具体可以包括：W2中的
Figure PCTCN2017072683-appb-000068
列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，以及，W2中的剩余
Figure PCTCN2017072683-appb-000069
个列向量与所述
Figure PCTCN2017072683-appb-000070
列的列向量的关系，所述N为W2的列数。
具体的，本实施方式中，终端设备和接入网设备之间并未预先约定W2中的列向量之间的关联关系，终端设备确定了预编码矩阵W后，向接入网设备发送第二PMI，该第二PMI包括W2中的
Figure PCTCN2017072683-appb-000071
列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，以及，W2中的剩余
Figure PCTCN2017072683-appb-000072
个列向量与所述
Figure PCTCN2017072683-appb-000073
列的列向量的关系。这样接入网设备在接收到终端设备上报的第二PMI后，可以根据该第二PMI中的W2中的
Figure PCTCN2017072683-appb-000074
列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，确定出该W2中的
Figure PCTCN2017072683-appb-000075
列的列向量，然后根据第二PMI中所包含的W2中的剩余
Figure PCTCN2017072683-appb-000076
个列向量与该
Figure PCTCN2017072683-appb-000077
列的列向量的关系，构造出W2中的剩余
Figure PCTCN2017072683-appb-000078
个列向量，进而确定出W2；可选的，还可以是接入网设备在确定出该W2中的
Figure PCTCN2017072683-appb-000079
列的列向量后，从码本中选择列数为N、且包含该
Figure PCTCN2017072683-appb-000080
列的列向量、同时剩余
Figure PCTCN2017072683-appb-000081
个列向量与该
Figure PCTCN2017072683-appb-000082
列的列向量之间的关联关系满足第二PMI的指示的矩阵，作为W2，本实施例对接入网设备如何根据第二PMI确定的W2的具体方式并不做限定。可选的，本实施方式中，接入网设备侧不仅仅可以包括不同的W2中的列向量与列向量之间的关联关系，至于接入网设备选择哪一个关联关系确定W2，其与终端设备侧上报的第二PMI中所指示的关联关系有关。
可选的，上述第二PMI所指示的
Figure PCTCN2017072683-appb-000083
列的列向量可以是任意的
Figure PCTCN2017072683-appb-000084
列的列向量，例如可以是前
Figure PCTCN2017072683-appb-000085
列的列向量，或者是中间
Figure PCTCN2017072683-appb-000086
列的列向量，本实施方式对此并不做限定。可选的，上述第二PMI具体可以包括：W2的前
Figure PCTCN2017072683-appb-000087
列列向量中除第一元素外的其他每个元素被量化后的量化值的索引，以及W2中的剩余
Figure PCTCN2017072683-appb-000088
个列向量与所述前
Figure PCTCN2017072683-appb-000089
列列向量的关联关系。在该种可选的方式下，接入网设备在接收到终端设备上报的第二PMI后，可以根据该第二PMI指示的W2的前
Figure PCTCN2017072683-appb-000090
列列向量中除第一元素外的 其他每个元素被量化后的量化值的索引确定出W2的前
Figure PCTCN2017072683-appb-000091
列列向量，然后结合第二PMI所指示的W2中的剩余
Figure PCTCN2017072683-appb-000092
个列向量与所述前
Figure PCTCN2017072683-appb-000093
列列向量的关联关系，确定W2。可选的，可以是接入网设备根据W2中的剩余
Figure PCTCN2017072683-appb-000094
个列向量与该前
Figure PCTCN2017072683-appb-000095
列列向量之间的关联关系线确定出W2中的剩余
Figure PCTCN2017072683-appb-000096
个列向量，然后结合确定的前
Figure PCTCN2017072683-appb-000097
列列向量得到W2，或者，还可以是接入网设备根据所确定的前
Figure PCTCN2017072683-appb-000098
列列向量、以及第二PMI所指示的关联关系，从码本中选择列数为N、前
Figure PCTCN2017072683-appb-000099
列列向量与第二PMI所指示的前
Figure PCTCN2017072683-appb-000100
列列向量相同、且剩余
Figure PCTCN2017072683-appb-000101
个列向量与该前
Figure PCTCN2017072683-appb-000102
列列向量的关联关系满足第二PMI所指示的关联关系的矩阵，作为W2。
另一方面，接入网设备根据上述第一PMI从与终端设备约定的码本中选择与该第一PMI对应的矩阵作为W1，因此，接入网设备根据上述W1和W2所得到的预编码矩阵W为非恒模矩阵，相较于Rel13以及Rel13之前的版本中接入网设备所确定的预编码矩阵，其大大提高了预编码矩阵的精度。
上述第二种可能的实施方式，当终端设备与接入网设备未预先约定W2中部分列向量与剩余列向量之间的关联关系时，终端设备在向接入网设备上报的第二PMI中包含W2中的
Figure PCTCN2017072683-appb-000103
列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，以及，W2中的剩余
Figure PCTCN2017072683-appb-000104
个列向量与所述
Figure PCTCN2017072683-appb-000105
列的列向量的关系，使得接入网设备可以通过该第二PMI确定W2，进而确定预编码矩阵W。该实施方式中，当W2的列数大于或者等于2时，终端设备向接入网设备上报的第二PMI中无需包含该W2中每一个元素被量化后的量化值的索引，节省了终端设备向接入网设备上报CSI的反馈开销；另外，接入网设备所确定的预编码矩阵为非恒模矩阵，其提高了CSI的反馈精度。
进一步地，结合上述第一种可能的实施方式和第二种可能的实施方式的描述可知，W2中的剩余
Figure PCTCN2017072683-appb-000106
个列向量与前
Figure PCTCN2017072683-appb-000107
列列向量之间均具有一定的关联关系，因此，作为本申请实施例的第三种可能的实施方式，本实施方式涉及的是该W2中的剩余
Figure PCTCN2017072683-appb-000108
个列向量与前列列向量之间的关联关系的具体内容。在上述实施例的基础上，W2中的剩余
Figure PCTCN2017072683-appb-000110
个列向量与所述前
Figure PCTCN2017072683-appb-000111
列列向量的关联关系，具体包括：W2中的第
Figure PCTCN2017072683-appb-000112
列列 向量的元素与第k列列向量的元素之间的相位关联关系，所述k为
Figure PCTCN2017072683-appb-000113
中的正整数。
具体的，在该可能的实施方式中，W2中的第
Figure PCTCN2017072683-appb-000114
列列向量的元素与第k列列向量的元素之间具有相位的关联关系，例如，当W2的列数为3时，W2的前
Figure PCTCN2017072683-appb-000115
列列向量为W2的前两列列向量，W2的剩余
Figure PCTCN2017072683-appb-000116
个列向量即为W2的第三列列向量，k的取值为1，该W2中第三列列向量的元素与第一列列向量的元素之间具有相位的关联关系。再例如，当W2的列数为4时，W2的前
Figure PCTCN2017072683-appb-000117
列列向量为W2的前两列列向量，W2的剩余
Figure PCTCN2017072683-appb-000118
个列向量即为W2的第三列列向量和第四列列向量，k的取值为1和2，即该W2中第三列列向量的元素与第一列列向量的元素之间具有相位的关联关系，该W2中第四列列向量的元素与第二列列向量的元素之间具有相位的关联关系。
可选的，上述W2中的第
Figure PCTCN2017072683-appb-000119
列列向量的元素与第k列列向量的元素之间的相位关联关系，例如可以是将第k列列向量的某个元素的相位旋转某一角度后得到W2中的第
Figure PCTCN2017072683-appb-000120
列列向量的某一个元素。可选的，当W2为M行N列的矩阵，其中M是偶数时，上述W2中的第
Figure PCTCN2017072683-appb-000121
列列向量的元素与第k列列向量的元素之间的相位关联关系，具体可以是：
Figure PCTCN2017072683-appb-000122
其中，cm,k为W2中第m行第k列的元素，
Figure PCTCN2017072683-appb-000123
为W2中第m行第
Figure PCTCN2017072683-appb-000124
列的元素，
Figure PCTCN2017072683-appb-000125
m为[1,M]中的正整数，p为
Figure PCTCN2017072683-appb-000126
中的正整数，a1,a2....,am不完全相同。
具体的，在该种可选的实现方式下，上述cm,k具有相位信息，
Figure PCTCN2017072683-appb-000127
也具有相位信息，该cm,k和
Figure PCTCN2017072683-appb-000128
之间具有一定的相位差，该相位差可以通过系数的方式体现，该系数即为上述am，例如，当cm,k和
Figure PCTCN2017072683-appb-000129
之间的相位差为90度时，该am等于j，当cm,k和
Figure PCTCN2017072683-appb-000130
之间的相位差为180度时，该am等于-1。当然，当cm,k和
Figure PCTCN2017072683-appb-000131
之间的相位差为其他的角度时，该am等于其他的值，本实施例对am的值并不做限定，只需要满足
Figure PCTCN2017072683-appb-000132
或者
Figure PCTCN2017072683-appb-000133
即可，其中，ap为W2中第
Figure PCTCN2017072683-appb-000134
列第p行的元素与第k列中第p行的元素之间的相位差值对应的系数，
Figure PCTCN2017072683-appb-000135
为W2中第
Figure PCTCN2017072683-appb-000136
列第
Figure PCTCN2017072683-appb-000137
行的元素与所述第k列中第
Figure PCTCN2017072683-appb-000138
行的元素之间的相位差值对应的系数。也就是说，对于第
Figure PCTCN2017072683-appb-000139
列来说，其对应的a1,a2....,am不完全相同，即第
Figure PCTCN2017072683-appb-000140
列中的每个元素与第k列中对应的每个元素之间的相位差值对应的系数不完全相同。
可选的，上述am∈{1,-1,j-j}，即上述cm,k和
Figure PCTCN2017072683-appb-000141
之间的相位差可以为90度、180度、270度和0度。当cm,k和
Figure PCTCN2017072683-appb-000142
之间的相位差为90度时，该am等于j，当cm,k和
Figure PCTCN2017072683-appb-000143
之间的相位差为180度时，该am等于-1，当cm,k和
Figure PCTCN2017072683-appb-000144
之间的相位差为270度时，该am等于-j，当cm,k和
Figure PCTCN2017072683-appb-000145
之间的相位差为0时，该am等于1。
因此，当终端设备与接入网设备预先约定上述
Figure PCTCN2017072683-appb-000146
和
Figure PCTCN2017072683-appb-000147
的关联关系后，终端设备向接入网设备上报第二PMI，该第二PMI包含W2中的前
Figure PCTCN2017072683-appb-000148
列列向量中除第一元素外的其他每个元素被量化后的量化值的索引，接入网设备就可以根据该第二PMI和预先约定的关联关系，确定出W2。当终端设备与接入网设备未预先约定上述
Figure PCTCN2017072683-appb-000149
和
Figure PCTCN2017072683-appb-000150
的关联关系时，终端设备在结合接入网设备下发的参考信号确定了预编码矩阵W后，终端设备向接入网设备上报第二PMI，该第二PMI包括上述
Figure PCTCN2017072683-appb-000151
和
Figure PCTCN2017072683-appb-000152
的关联关系，也包括了W2的前
Figure PCTCN2017072683-appb-000153
列列向量中除第一元素外的其他每个元素被量化后的量化值的索引，因此，接入网设备也可以结合该第二PMI确定出W2。
为了更清楚的说明本申请实施例中W2中的第
Figure PCTCN2017072683-appb-000154
列列向量的元素与第k列列向量的元素之间的相位关联关系，结合上述
Figure PCTCN2017072683-appb-000155
这里以W2为4行3列的矩阵(M＝4，N＝3)和4行4列的矩阵(M＝4，N＝3)为例，进行具体介绍：
(1)当W2为4行3列的矩阵(M＝4，N＝3)时，W2中的第
Figure PCTCN2017072683-appb-000156
列列向量的元素与第k列列向量的元素之间的相位关联关系，具体可以为下述的A、B、C、D中的任一种关联关系。
A：W2的第三列列向量的前两行元素与W2的第一列列向量的前两行元素相同，W2的第三列列向量的后两行元素为W2的第一列列向量的后两行元素相位旋转180度后的值。 可选的，该W2具体可以为：
Figure PCTCN2017072683-appb-000157
B：W2的第三列列向量的第一行和第四行的元素分别与W2的第一列列向量的第一行和第四行的元素相同，W2的第三列列向量的第二行和第三行的元素为分别将W2的第一列列向量的第二行和第三行的元素相位旋转180度后的值。可选的，该W2具体可以为：
Figure PCTCN2017072683-appb-000158
C：W2的第三列列向量的第一行元素与W2的第一列列向量的第一行元素相同，W2的第三列列向量的第二行元素为将W2的第一列列向量的第二行元素旋转90度后的值，W2的第三列列向量的第三行元素为将W2的第一列列向量的第三行元素旋转180度后的值，W2的第三列列向量的第四行元素为将W2的第一列列向量的第四行元素旋转270度后的值。可选的，该W2具体可以为：
Figure PCTCN2017072683-appb-000159
D：W2的第三列列向量中的第一行元素与W2的第一列列向量的第一行元素相同，W2的第三列列向量的第二行元素为将W2的第一列列向量的第二行元素旋转270度后的值，W2的第三列列向量的第三行元素为将W2的第一列列向量的第三行元素旋转180度后的值，W2的第三列列向量的第四行元素为将W2的第一列列向量的第四行元素旋转90度后的值。可选的，该W2具体可以为：
Figure PCTCN2017072683-appb-000160
(2)当W2为4行4列的矩阵(M＝4，N＝4)时，W2中的第
Figure PCTCN2017072683-appb-000161
列列向量的元素与第k列列向量的元素之间的相位关联关系，具体可以为下述的E、F、G、H中的任一种关联关系。
E：W2的第三列列向量的前两行元素与W2的第一列列向量中的前两行元素相同，W2的第四列列向量的前两行元素与W2的第二列列向量的前两行元素相同，W2的第三列列向量的后两行元素为将W2的第一列列向量的后两行元素相位旋转180度后的值，W2的第四列列向量的后两行元素为将W2的第二列列向量的后两行元素相位旋转180度后的值。可 选的，该W2具体可以为：
Figure PCTCN2017072683-appb-000162
F：W2的第三列列向量的第一行和第四行的元素与W2的第一列列向量的第一行和第四行的元素相同，W2的第四列列向量的第一行和第四行的元素与W2的第二列列向量的第一行和第四行的元素相同，W2的第三列列向量的第二行和第三行的元素为分别将W2的第一列列向量的第二行和第三行的元素相位旋转180度后的值，W2的第四列列向量的第二行和第三行的元素为分别将W2的第二列列向量的第二行和第三行的元素相位旋转180度后的值。可选的，该W2具体可以为：
Figure PCTCN2017072683-appb-000163
G：W2的第三列列向量的第一行元素与W2的第一列列向量的第一行元素相同，W2的第三列列向量的第二行元素为将W2的第一列列向量的第二行元素旋转90度后的值，W2的第三列列向量的第三行元素为将W2的第一列列向量的第三行元素旋转180度后的值，W2的第三列列向量的第四行元素为将W2的第一列列向量的第四行元素旋转270度后的值，W2的第四列列向量的第一行元素与W2的第二列列向量的第一行元素相同，W2的第四列列向量的第二行元素为将W2的第二列列向量的第二行元素旋转90度后的值，W2的第四列列向量的第三行元素为将W2的第二列列向量的第三行元素旋转180度后的值，W2的第四列列向量的第四行元素为将W2的第二列列向量的第四行元素旋转270度后的值。可选的，该W2具体可以为：
Figure PCTCN2017072683-appb-000164
H：W2的第三列列向量的第一行元素与W2的第一列列向量的第一行元素相同，W2的第三列列向量的第二行元素为将W2的第一列列向量的第二行元素旋转270度后的值，W2的第三列列向量的第三行元素为将W2的第一列列向量的第三行元素旋转180度后的值，W2的第三列列向量的第四行元素为将W2的第一列列向量的第四行元素旋转90度后的值，W2的第四列列向量的第一行元素与W2的第二列列向量的第一行元素相同，W2的第四列列向量的第二行元素为将W2的第二列列向量的第二行元素旋转270度后的值，W2的第四列列向量的第三行元素为将W2的第二列列向量的第三行元素旋转180度后的值，W2的第四列列向量的第四行元素为将W2的第二列列向量的第四行元素旋转90度后的值。可选的，该W2具体可以为：
Figure PCTCN2017072683-appb-000165
可选的，当W2为6行3列的矩阵时，按照上述
Figure PCTCN2017072683-appb-000166
和
Figure PCTCN2017072683-appb-000167
的关联关系，该W2可以为：
Figure PCTCN2017072683-appb-000168
综上所述，上述第三种可能的实施方式中，当W2的列数大于或者等于2时，即W的秩大于或者等于2时，终端设备可以向接入网设备上报包含有W2的前
Figure PCTCN2017072683-appb-000169
列列向量中除第一元素外的其他每个元素被量化后的量化值的索引，使得接入网设备根据预知的W2中的剩余
Figure PCTCN2017072683-appb-000170
个列向量与该前
Figure PCTCN2017072683-appb-000171
列列向量的关联关系或者第二PMI所指示的关联关系，确定出W2，进而根据终端设备上报的第一PMI确定出W1，从而得到接入网设备侧的预编码矩阵W，其无需终端设备上报W2中每个元素被量化后的量化值的索引，大大节省了终端设备的CSI反馈开销，使得上行资源得到更有效的利用。
图3为本申请实施例提供的信道状态信息的传输方法的信令流程示意图。本实施例涉及的是终端设备向接入网设备上报CQI以及接入网设备对所得到的预编码矩阵W执行正交化操作的具体过程。在上述实施例的基础上，进一步地，在上述S101之后，该方法还可以包括：
S201、终端设备对W执行正交化操作，得到正交的预编码矩阵Wo；其中，Wo中的任意两个列向量彼此正交。
S202：终端设备根据Wo确定CQI，并将所述CQI发送给所述接入网设备。
具体的，上述S201和S202可以与上述S102并没有严格的时序关系的限定，例如，上述S201和S202可以与上述S102可以是同时进行，还可以位于上述S102之前进行，本实施例对此并不做限定。本实施例中，终端设备在确定了预编码矩阵W后，可以对该W执行正交化操作，得到正交的预编码矩阵Wo，可选的，这里所说的正交可以是“完全正交”，还可以是“近似正交”。然后终端设备可以根据该正交的预编码矩阵Wo确定出CQI，上报给接入网设备，提高了CQI的精度，利用预编码矩阵Wo确定CQI的方式可以参见现有技术中利用预编码矩阵W确定CQI的方式，在此不再赘述。可选的，上述正交化操作可以包括：施密特正交化、迫零算法、SVD分解、QR分解中的任一个操作。
需要说明的是，当预编码矩阵W的秩等于2时，其也可以对该W执行上述正交化操作，并根据得到的正交的预编码矩阵计算CQI进行上报。可选的，上述CQI在上报时可以单独上报给接入网设备，还可以携带在CSI中上报给接入网设备。
S203：接入网设备接收终端设备上报的CQI。
当接入网设备接收到终端设备上报的CQI后，可以根据该CQI获知当前的下行信道的质量，然后依据该CQI以及上述依据第一PMI和第二PMI得到的预编码矩阵进行下行数据的下发。
可选的，上述接入网设备在根据第一PMI和第二PMI得到预编码矩阵W后，也可以对该W执行正交化操作，例如依据上述施密特正交化、迫零算法、SVD分解、QR分解中的任一个操作对该W执行正交，得到正交的预编码矩阵Wo，这样接入网设备可以根据该正交的预编码矩阵Wo进行下行数据的发送。
在发送下行数据时，可选的，对于单用户场景，接入网设备可以直接根据上述正交的预编码矩阵Wo对待发送的下行数据进行预编码，从而将编码后的数据下发给终端设备；对于多用户场景，以两个终端设备为例，假设终端设备1和终端设备2各自分别向接入网设备上报了第一PMI和第二PIM，接入网设备根据所接收到的第一PMI和第二PMI，分别确定出两个预编码矩阵，其中，预编码矩阵Wa与终端设备1对应，预编码矩阵Wb与终端设备2对应，接入网设备可以分别对预编码矩阵Wa和预编码矩阵Wb执行正交化操作，得到与Wa对应的正交的预编码矩阵Wao、以及与Wb对应的正交的预编码矩阵Wbo，然后接入网设备可以根据该Wao和Wbo，确定另一正交的预编码矩阵Wco，该Wco中的任意两个列向量彼此正交，然后根据该Wco中的不同的列向量分别对发送给终端设备1和终端设备2的数据进行预编码，从而降低发送过程中下行数据的互相干扰。
本申请实施例提供的信道状态信息的传输方法，终端设备通过对所确定的预编码矩阵执行正交化操作，得到正交的预编码矩阵Wo，然后根据该Wo确定出CQI并上报给接入网设备，提高了CQI的精度，使得接入网设备能够更有效的进行数据的传输；另外，通过接入网设备对根据第一PMI和第二PMI得到的预编码矩阵执行正交化操作得到正交的预编码矩阵Wo，进而根据该Wo以及不同的用户场景向终端设备下发数据，降低了发送过程中下行数据的互相干扰，提高了数据传输的效率。
本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于一计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括：ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
图4为本申请实施例提供的接入网设备一实施例的结构示意图。如图4所示，该接入网设备包括接收模块11和处理模块12。
具体的，接收模块11，用于接收终端设备上报的信道状态信息CSI，所述CSI包括第一预编码矩阵指示PMI和第二PMI；
处理模块12，用于根据所述第一PMI和第二PMI，确定预编码矩阵W，W满足W＝W1×W2；
W1对应于所述第一PMI，W2对应于所述第二PMI，所述第二PMI用于指示W2的部分列向量，所述W秩大于或者等于2。
可选的，该接收模块11可以通过相应的接收机或者接收器实现，例如通过接入网设备中的射频模块或者基带模块实现。该处理模块12可以通过相应的处理器、微控制单元、数字处理器等具有控制功能的元器件实现。
可选的，所述第二PMI包括：W2中的
Figure PCTCN2017072683-appb-000172
列的列向量中除第一元素外的其他每个 元素被量化后的量化值的索引，其中，W2中的剩余
Figure PCTCN2017072683-appb-000173
个列向量与所述
Figure PCTCN2017072683-appb-000174
列的列向量具有预设的关联关系，所述N为W2的列数，所述第一元素为所述
Figure PCTCN2017072683-appb-000175
列的列向量中保持不变的元素。
进一步地，所述第二PMI具体包括：W2的前
Figure PCTCN2017072683-appb-000176
列列向量中除第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
Figure PCTCN2017072683-appb-000177
个列向量与所述前
Figure PCTCN2017072683-appb-000178
列列向量具有预设的关联关系。
可选的，所述第二PMI还用于指示所述部分列向量与W2中除所述部分列向量的剩余列向量的关联关系。
进一步地，所述第二PMI包括：W2中的
Figure PCTCN2017072683-appb-000179
列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，以及，W2中的剩余
Figure PCTCN2017072683-appb-000180
个列向量与所述
Figure PCTCN2017072683-appb-000181
列的列向量的关系，所述N为W2的列数，所述第一元素为所述
Figure PCTCN2017072683-appb-000182
列的列向量中保持不变的元素。
更进一步地，所述第二PMI具体包括：
W2的前
Figure PCTCN2017072683-appb-000183
列列向量中除第一元素外的其他每个元素被量化后的量化值的索引，以及W2中的剩余
Figure PCTCN2017072683-appb-000184
个列向量与所述前
Figure PCTCN2017072683-appb-000185
列列向量的关联关系。
更进一步地，所述W2中的剩余
Figure PCTCN2017072683-appb-000186
个列向量与所述前
Figure PCTCN2017072683-appb-000187
列列向量的关联关系，具体包括：
W2中的第
Figure PCTCN2017072683-appb-000188
列列向量的元素与第k列列向量的元素之间的相位关联关系，所述k为
Figure PCTCN2017072683-appb-000189
中的正整数。
可选的，W2为M行N列的矩阵,其中M是偶数，则所述W2中的第
Figure PCTCN2017072683-appb-000190
列列向量的元素与第k列列向量的元素之间的相位关联关系，具体包括：
Figure PCTCN2017072683-appb-000191
其中，cm,k为W2中第m行第k列的元素，
Figure PCTCN2017072683-appb-000192
为W2中第m行第
Figure PCTCN2017072683-appb-000193
列的元素，
Figure PCTCN2017072683-appb-000194
m为[1,M]中的正整数，p为
Figure PCTCN2017072683-appb-000195
中的正整数，a1,a2....,am不完全相同。
可选的，am∈{1,-1,j-j}。
可选的，所述处理模块12，还用于对所述W执行正交化操作，得到正交的预编码矩阵Wo；其中，Wo中的任意两个列向量彼此正交，所述正交化操作包括施密特正交化、迫零算法、SVD分解、QR分解中的任一个操作。
可选的，所述第一PMI包括W1中的每一个列向量的线性加权值的幅度信息的索引或者功率信息的索引、和W1中每一个列向量的索引。
本申请实施例提供的接入网设备，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再赘述。
图5为本申请实施例提供的终端设备一实施例的结构示意图。如图5所示，该终端设备包括接收模块21、处理模块22和发送模块23。
具体的，所述处理模块22，用于根据所述接收模块21接收的接入网设备下发的参考信号确定预编码矩阵W，W满足W＝W1×W2；
所述发送模块23，用于向所述接入网设备发送信道状态信息CSI，所述CSI包括第一预编码矩阵指示PMI和第二PMI，W1对应于所述第一PMI，W2对应于所述第二PMI，所述第二PMI用于指示W2的部分列向量，所述W的秩大于或者等于2。
可选的，该接收模块21可以通过相应的接收机或者接收器实现，例如通过终端设备中的射频模块或者基带模块实现。该发送模块23可以通过相应的发送机或者发送器实现，例如通过终端设备中的射频模块或者基带模块实现。该处理模块22可以通过相应的处理器、微控制单元、数字处理器等具有控制功能的元器件实现。
可选的，所述第二PMI包括：W2中的
Figure PCTCN2017072683-appb-000196
列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
Figure PCTCN2017072683-appb-000197
个列向量与所述
Figure PCTCN2017072683-appb-000198
列的列向量具有预设的关联关系，所述N为W2的列数，所述第一元素为所述
Figure PCTCN2017072683-appb-000199
列的列向量中保持不变的元素。
进一步地，所述第二PMI具体包括：W2的前
Figure PCTCN2017072683-appb-000200
列列向量中除第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
Figure PCTCN2017072683-appb-000201
个列向量与所述前
Figure PCTCN2017072683-appb-000202
列列向量具有预设的关联关系。
可选的，所述第二PMI还用于指示所述部分列向量与W2中除所述部分列向量的剩余列向量的关联关系。
进一步地，所述第二PMI包括：W2中的
Figure PCTCN2017072683-appb-000203
列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，以及，W2中的剩余
Figure PCTCN2017072683-appb-000204
个列向量与所述
Figure PCTCN2017072683-appb-000205
列的列向量的关系，所述N为W2的列数，所述第一元素为所述
Figure PCTCN2017072683-appb-000206
列的列向量中保持不变 的元素。
更进一步地，所述第二PMI具体包括：
W2的前
Figure PCTCN2017072683-appb-000207
列列向量中除第一元素外的其他每个元素被量化后的量化值的索引，以及W2中的剩余
Figure PCTCN2017072683-appb-000208
个列向量与所述前
Figure PCTCN2017072683-appb-000209
列列向量的关联关系。
更进一步地，所述W2中的剩余
Figure PCTCN2017072683-appb-000210
个列向量与所述前
Figure PCTCN2017072683-appb-000211
列列向量的关联关系，具体包括：
W2中的第
Figure PCTCN2017072683-appb-000212
列列向量的元素与第k列列向量的元素之间的相位关联关系，所述k为
Figure PCTCN2017072683-appb-000213
中的正整数。
可选的，W2为M行N列的矩阵,其中M是偶数，则所述W2中的第
Figure PCTCN2017072683-appb-000214
列列向量的元素与第k列列向量的元素之间的相位关联关系，具体包括：
Figure PCTCN2017072683-appb-000215
其中，cm,k为W2中第m行第k列的元素，
Figure PCTCN2017072683-appb-000216
为W2中第m行第
Figure PCTCN2017072683-appb-000217
列的元素，
Figure PCTCN2017072683-appb-000218
m为[1,M]中的正整数，p为
Figure PCTCN2017072683-appb-000219
中的正整数，a1,a2....,am不完全相同。
可选的，am∈{1,-1,j-j}。
可选的，所述处理模块22，还用于对W执行正交化操作，得到正交的预编码矩阵Wo，并根据Wo确定CQI；其中，Wo中的任意两个列向量彼此正交，所述正交化操作包括施密特正交化、迫零算法、SVD分解、QR分解中的任一个操作；
所述发送模块23，还用于将所述CQI发送给所述接入网设备。
可选的，所述第一PMI包括W1中的每一个列向量的线性加权值的幅度信息的索引或者功率信息的索引、和W1中每一个列向量的索引。
本申请实施例提供的终端设备，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再赘述。
图6为本申请实施例提供的接入网设备另一实施例的结构示意图。如图6所示，该网络设备可以包括接收器31、处理器32、存储器33。存储器33可能包含高速RAM存储器，也可能还包括非易失性存储NVM，例如至少一个磁盘存储器，存储器33中可以存储各种程序，用于完成各种处理功能以及实现本实施例的方法步骤。可选的，本实施例中的接收器31可以为接入网设备上的射频模块或者基带模块。
本实施例中，接收器31，用于接收终端设备上报的信道状态信息CSI，所述CSI包括第一预编码矩阵指示PMI和第二PMI；
处理器32，用于根据所述第一PMI和第二PMI，确定预编码矩阵W，W满足 W＝W1×W2；
W1对应于所述第一PMI，W2对应于所述第二PMI，所述第二PMI用于指示W2的部分列向量，所述W秩大于或者等于2。
可选的，所述第二PMI包括：W2中的
Figure PCTCN2017072683-appb-000220
列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
Figure PCTCN2017072683-appb-000221
个列向量与所述
Figure PCTCN2017072683-appb-000222
列的列向量具有预设的关联关系，所述N为W2的列数，所述第一元素为所述
Figure PCTCN2017072683-appb-000223
列的列向量中保持不变的元素。
进一步地，所述第二PMI具体包括：W2的前
Figure PCTCN2017072683-appb-000224
列列向量中除第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
Figure PCTCN2017072683-appb-000225
个列向量与所述前
Figure PCTCN2017072683-appb-000226
列列向量具有预设的关联关系。
可选的，所述第二PMI还用于指示所述部分列向量与W2中除所述部分列向量的剩余列向量的关联关系。
进一步地，所述第二PMI包括：W2中的
Figure PCTCN2017072683-appb-000227
列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，以及，W2中的剩余
Figure PCTCN2017072683-appb-000228
个列向量与所述
Figure PCTCN2017072683-appb-000229
列的列向量的关系，所述N为W2的列数，所述第一元素为所述
Figure PCTCN2017072683-appb-000230
列的列向量中保持不变的元素。
更进一步地，所述第二PMI具体包括：
W2的前
Figure PCTCN2017072683-appb-000231
列列向量中除第一元素外的其他每个元素被量化后的量化值的索引，以及W2中的剩余
Figure PCTCN2017072683-appb-000232
个列向量与所述前
Figure PCTCN2017072683-appb-000233
列列向量的关联关系。
更进一步地，所述W2中的剩余
Figure PCTCN2017072683-appb-000234
个列向量与所述前
Figure PCTCN2017072683-appb-000235
列列向量的关联关系，具体包括：
W2中的第
Figure PCTCN2017072683-appb-000236
列列向量的元素与第k列列向量的元素之间的相位关联关系，所述k为
Figure PCTCN2017072683-appb-000237
中的正整数。
可选的，W2为M行N列的矩阵,其中M是偶数，则所述W2中的第
Figure PCTCN2017072683-appb-000238
列列向量的元素与第k列列向量的元素之间的相位关联关系，具体包括：
Figure PCTCN2017072683-appb-000239
其中，cm,k为W2中第m行第k列的元素，
Figure PCTCN2017072683-appb-000240
为W2中第m行第
Figure PCTCN2017072683-appb-000241
列的元素，
Figure PCTCN2017072683-appb-000242
m为[1,M]中的正整数，p为
Figure PCTCN2017072683-appb-000243
中的正整数，a1,a2....,am不完全相同。
可选的，am∈{1,-1,j-j}。
可选的，所述处理器32，还用于对所述W执行正交化操作，得到正交的预编码矩阵Wo；其中，Wo中的任意两个列向量彼此正交，所述正交化操作包括施密特正交化、迫零算法、SVD分解、QR分解中的任一个操作。
可选的，所述第一PMI包括W1中的每一个列向量的线性加权值的幅度信息的索引或者功率信息的索引、和W1中每一个列向量的索引。
本申请实施例提供的接入网设备，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再赘述。
图7为本申请实施例提供的终端设备另一实施例的结构示意图。如图7所示，该终端设备可以包括接收器40、发送器41、处理器42、存储器43。存储器43可能包含高速RAM存储器，也可能还包括非易失性存储NVM，例如至少一个磁盘存储器，存储器43中可以存储各种程序，用于完成各种处理功能以及实现本实施例的方法步骤。可选的，本实施例中的接收器40和接收器41可以为终端设备上的射频模块或者基带模块。
本实施例中，所述处理器42，用于根据所述接收器40接收的接入网设备下发的参考信号确定预编码矩阵W，W满足W＝W1×W2；
所述发送器41，用于向所述接入网设备发送信道状态信息CSI，所述CSI包括第一预编码矩阵指示PMI和第二PMI，W1对应于所述第一PMI，W2对应于所述第二PMI，所述第二PMI用于指示W2的部分列向量，所述W的秩大于或者等于2。
可选的，所述第二PMI包括：W2中的
Figure PCTCN2017072683-appb-000244
列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
Figure PCTCN2017072683-appb-000245
个列向量与所述
Figure PCTCN2017072683-appb-000246
列的列向量具有预设的关联关系，所述N为W2的列数，所述第一元素为所述
Figure PCTCN2017072683-appb-000247
列的列向量中保持不变的元素。
进一步地，所述第二PMI具体包括：W2的前
Figure PCTCN2017072683-appb-000248
列列向量中除第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
Figure PCTCN2017072683-appb-000249
个列向量与所述前
Figure PCTCN2017072683-appb-000250
列列向量具有预设的关联关系。
可选的，所述第二PMI还用于指示所述部分列向量与W2中除所述部分列向量的剩余列向量的关联关系。
进一步地，所述第二PMI包括：W2中的
Figure PCTCN2017072683-appb-000251
列的列向量中除第一元素外的其他每 个元素被量化后的量化值的索引，以及，W2中的剩余
Figure PCTCN2017072683-appb-000252
个列向量与所述
Figure PCTCN2017072683-appb-000253
列的列向量的关系，所述N为W2的列数，所述第一元素为所述
Figure PCTCN2017072683-appb-000254
列的列向量中保持不变的元素。
更进一步地，所述第二PMI具体包括：
W2的前
Figure PCTCN2017072683-appb-000255
列列向量中除第一元素外的其他每个元素被量化后的量化值的索引，以及W2中的剩余
Figure PCTCN2017072683-appb-000256
个列向量与所述前
Figure PCTCN2017072683-appb-000257
列列向量的关联关系。
更进一步地，所述W2中的剩余
Figure PCTCN2017072683-appb-000258
个列向量与所述前
Figure PCTCN2017072683-appb-000259
列列向量的关联关系，具体包括：
W2中的第
Figure PCTCN2017072683-appb-000260
列列向量的元素与第k列列向量的元素之间的相位关联关系，所述k为
Figure PCTCN2017072683-appb-000261
中的正整数。
可选的，W2为M行N列的矩阵,其中M是偶数，则所述W2中的第
Figure PCTCN2017072683-appb-000262
列列向量的元素与第k列列向量的元素之间的相位关联关系，具体包括：
Figure PCTCN2017072683-appb-000263
其中，cm,k为W2中第m行第k列的元素，
Figure PCTCN2017072683-appb-000264
为W2中第m行第
Figure PCTCN2017072683-appb-000265
列的元素，
Figure PCTCN2017072683-appb-000266
m为[1,M]中的正整数，p为
Figure PCTCN2017072683-appb-000267
中的正整数，a1,a2....,am不完全相同。
可选的，am∈{1,-1,j-j}。
可选的，所述处理器42，还用于对W执行正交化操作，得到正交的预编码矩阵Wo，并根据Wo确定CQI；其中，Wo中的任意两个列向量彼此正交，所述正交化操作包括施密特正交化、迫零算法、SVD分解、QR分解中的任一个操作；
所述发送器41，还用于将所述CQI发送给所述接入网设备。
可选的，所述第一PMI包括W1中的每一个列向量的线性加权值的幅度信息的索引或者功率信息的索引、和W1中每一个列向量的索引。
本申请实施例提供的终端设备，可以执行上述方法实施例，其实现原理和技术效果类似，在此不再赘述。
结合本申请公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现，也可以通过计算机程序产品实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存 储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于用户设备中。当然，处理器和存储介质也可以作为分立组件存在于用户设备中。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、设备和方法，在没有超过本申请的范围内，可以通过其他的方式实现。例如，以上所描述的实施例仅仅是示意性的，例如，所述模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性劳动的情况下，即可以理解并实施。
另外，所描述系统、设备和方法以及不同实施例的示意图，在不超出本申请的范围内，可以与其它系统，模块，技术或方法结合或集成。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电子、机械或其它的形式。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (32)

  1. 一种信道状态信息的传输方法，其特征在于，包括：
    接入网设备接收终端设备上报的信道状态信息CSI，所述CSI包括第一预编码矩阵指示PMI和第二PMI；
    所述接入网设备根据所述第一PMI和第二PMI，确定预编码矩阵W，W满足W＝W1×W2；
    W1对应于所述第一PMI，W2对应于所述第二PMI，所述第二PMI用于指示W2的部分列向量，所述W秩大于或者等于2。
  2. 根据权利要求1所述的方法，其特征在于，所述第二PMI包括：W2中的
    Figure PCTCN2017072683-appb-100001
    列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
    Figure PCTCN2017072683-appb-100002
    个列向量与所述
    Figure PCTCN2017072683-appb-100003
    列的列向量具有预设的关联关系，所述N为W2的列数，所述第一元素为所述
    Figure PCTCN2017072683-appb-100004
    列的列向量中保持不变的元素。
  3. 根据权利要求2所述的方法，其特征在于，所述第二PMI具体包括：W2的前
    Figure PCTCN2017072683-appb-100005
    列列向量中除所述第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
    Figure PCTCN2017072683-appb-100006
    个列向量与所述前
    Figure PCTCN2017072683-appb-100007
    列列向量具有预设的关联关系。
  4. 根据权利要求1所述的方法，其特征在于，所述第二PMI还用于指示所述部分列向量与W2中除所述部分列向量的剩余列向量的关联关系。
  5. 根据权利要求4所述的方法，其特征在于，所述第二PMI包括：W2中的
    Figure PCTCN2017072683-appb-100008
    列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，以及，W2中的剩余
    Figure PCTCN2017072683-appb-100009
    个列向量与所述
    Figure PCTCN2017072683-appb-100010
    列的列向量的关系，所述N为W2的列数，所述第一元素为所述
    Figure PCTCN2017072683-appb-100011
    列的列向量中保持不变的元素。
  6. 根据权利要求5所述的方法，其特征在于，所述第二PMI具体包括：
    W2的前
    Figure PCTCN2017072683-appb-100012
    列列向量中除所述第一元素外的其他每个元素被量化后的量化值的索引，以及W2中的剩余
    Figure PCTCN2017072683-appb-100013
    个列向量与所述前
    Figure PCTCN2017072683-appb-100014
    列列向量的关联关系。
  7. 根据权利要求3或6所述的方法，其特征在于，所述W2中的剩余
    Figure PCTCN2017072683-appb-100015
    个列向量与所述前
    Figure PCTCN2017072683-appb-100016
    列列向量的关联关系，具体包括：
    W2中的第
    Figure PCTCN2017072683-appb-100017
    列列向量的元素与第k列列向量的元素之间的相位关联关系，所述k为
    Figure PCTCN2017072683-appb-100018
    中的正整数。
  8. 根据权利要求7所述的方法，其特征在于，W2为M行N列的矩阵,其中M是偶数，则所述W2中的第
    Figure PCTCN2017072683-appb-100019
    列列向量的元素与第k列列向量的元素之间的相位关联关系，具体包括：
    Figure PCTCN2017072683-appb-100020
    其中，cm,k为W2中第m行第k列的元素，
    Figure PCTCN2017072683-appb-100021
    为W2中第m行第
    Figure PCTCN2017072683-appb-100022
    列的元素，
    Figure PCTCN2017072683-appb-100023
    m为[1,M]中的正整数，p为
    Figure PCTCN2017072683-appb-100024
    中的正整数，a1,a2....,am不完全相同。
  9. 一种信道状态信息的传输方法，其特征在于，包括：
    终端设备根据接入网设备下发的参考信号确定预编码矩阵W，W满足W＝W1×W2；
    所述终端设备向所述接入网设备发送信道状态信息CSI，所述CSI包括第一预编码矩阵指示PMI和第二PMI，W1对应于所述第一PMI，W2对应于所述第二PMI，所述第二PMI用于指示W2的部分列向量，所述W的秩大于或者等于2。
  10. 根据权利要求9所述的方法，其特征在于，所述第二PMI包括：W2中的
    Figure PCTCN2017072683-appb-100025
    列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
    Figure PCTCN2017072683-appb-100026
    个列向量与所述
    Figure PCTCN2017072683-appb-100027
    列的列向量具有预设的关联关系，所述N为W2的列数，所述第一元素为所述
    Figure PCTCN2017072683-appb-100028
    列的列向量中保持不变的元素。
  11. 根据权利要求10所述的方法，其特征在于，所述第二PMI具体包括：W2的前
    Figure PCTCN2017072683-appb-100029
    列列向量中除所述第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
    Figure PCTCN2017072683-appb-100030
    个列向量与所述前
    Figure PCTCN2017072683-appb-100031
    列列向量具有预设的关联关系。
  12. 根据权利要求9所述的方法，其特征在于，所述第二PMI还用于指示所述部分列向量与W2中除所述部分列向量的剩余列向量的关联关系。
  13. 根据权利要求12所述的方法，其特征在于，所述第二PMI包括：W2中的
    Figure PCTCN2017072683-appb-100032
    列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，以及，W2中的剩余
    Figure PCTCN2017072683-appb-100033
    个列向量与所述
    Figure PCTCN2017072683-appb-100034
    列的列向量的关系，所述N为W2的列数，所述第一元素为所述
    Figure PCTCN2017072683-appb-100035
    列的列向量中保持不变的元素。
  14. 根据权利要求13所述的方法，其特征在于，所述第二PMI具体包括：
    W2的前
    Figure PCTCN2017072683-appb-100036
    列列向量中除所述第一元素外的其他每个元素被量化后的量化值的索引，以及W2中的剩余
    Figure PCTCN2017072683-appb-100037
    个列向量与所述前
    Figure PCTCN2017072683-appb-100038
    列列向量的关联关系。
  15. 根据权利要求11或14所述的方法，其特征在于，所述W2中的剩余
    Figure PCTCN2017072683-appb-100039
    个列向量与所述前
    Figure PCTCN2017072683-appb-100040
    列列向量的关联关系，具体包括：
    W2中的第
    Figure PCTCN2017072683-appb-100041
    列列向量的元素与第k列列向量的元素之间的相位关联关系，所述k为
    Figure PCTCN2017072683-appb-100042
    中的正整数。
  16. 根据权利要求15所述的方法，其特征在于，W2为M行N列的矩阵,其中M是偶数，则所述W2中的第
    Figure PCTCN2017072683-appb-100043
    列列向量的元素与第k列列向量的元素之间的相位关联关系，具体包括：
    Figure PCTCN2017072683-appb-100044
    其中，cm,k为W2中第m行第k列的元素，
    Figure PCTCN2017072683-appb-100045
    为W2中第m行第
    Figure PCTCN2017072683-appb-100046
    列的元素，
    Figure PCTCN2017072683-appb-100047
    m为[1,M]中的正整数，p为
    Figure PCTCN2017072683-appb-100048
    中的正整数，a1,a2....,am不完全相同。
  17. 一种接入网设备，其特征在于，包括：
    接收模块，用于接收终端设备上报的信道状态信息CSI，所述CSI包括第一预编码矩阵指示PMI和第二PMI；
    处理模块，用于根据所述第一PMI和第二PMI，确定预编码矩阵W，W满足W＝W1×W2；
    W1对应于所述第一PMI，W2对应于所述第二PMI，所述第二PMI用于指示W2的部分列向量，所述W秩大于或者等于2。
  18. 根据权利要求17所述的接入网设备，其特征在于，所述第二PMI包括：W2中的
    Figure PCTCN2017072683-appb-100049
    列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
    Figure PCTCN2017072683-appb-100050
    个列向量与所述
    Figure PCTCN2017072683-appb-100051
    列的列向量具有预设的关联关系，所述N为W2的列数，所述第一元素为所述
    Figure PCTCN2017072683-appb-100052
    列的列向量中保持不变的元素。
  19. 根据权利要求18所述的接入网设备，其特征在于，所述第二PMI具体包括：W2的前
    Figure PCTCN2017072683-appb-100053
    列列向量中除所述第一元素外的其他每个元素被量化后的量化值的索引，其中， W2中的剩余
    Figure PCTCN2017072683-appb-100054
    个列向量与所述前
    Figure PCTCN2017072683-appb-100055
    列列向量具有预设的关联关系。
  20. 根据权利要求17所述的接入网设备，其特征在于，所述第二PMI还用于指示所述部分列向量与W2中除所述部分列向量的剩余列向量的关联关系。
  21. 根据权利要求20所述的接入网设备，其特征在于，所述第二PMI包括：W2中的
    Figure PCTCN2017072683-appb-100056
    列的列向量中除所述第一元素外的其他每个元素被量化后的量化值的索引，以及，W2中的剩余
    Figure PCTCN2017072683-appb-100057
    个列向量与所述
    Figure PCTCN2017072683-appb-100058
    列的列向量的关系，所述N为W2的列数，所述第一元素为所述
    Figure PCTCN2017072683-appb-100059
    列的列向量中保持不变的元素。
  22. 根据权利要求21所述的接入网设备，其特征在于，所述第二PMI具体包括：
    W2的前
    Figure PCTCN2017072683-appb-100060
    列列向量中除所述第一元素外的其他每个元素被量化后的量化值的索引，以及W2中的剩余
    Figure PCTCN2017072683-appb-100061
    个列向量与所述前
    Figure PCTCN2017072683-appb-100062
    列列向量的关联关系。
  23. 根据权利要求19或者22所述的接入网设备，其特征在于，所述W2中的剩余
    Figure PCTCN2017072683-appb-100063
    个列向量与所述前
    Figure PCTCN2017072683-appb-100064
    列列向量的关联关系，具体包括：
    W2中的第
    Figure PCTCN2017072683-appb-100065
    列列向量的元素与第k列列向量的元素之间的相位关联关系，所述k为
    Figure PCTCN2017072683-appb-100066
    中的正整数。
  24. 根据权利要求23所述的接入网设备，其特征在于，W2为M行N列的矩阵,其中M是偶数，则所述W2中的第
    Figure PCTCN2017072683-appb-100067
    列列向量的元素与第k列列向量的元素之间的相位关联关系，具体包括：
    Figure PCTCN2017072683-appb-100068
    其中，cm,k为W2中第m行第k列的元素，
    Figure PCTCN2017072683-appb-100069
    为W2中第m行第
    Figure PCTCN2017072683-appb-100070
    列的元素，
    Figure PCTCN2017072683-appb-100071
    m为[1,M]中的正整数，p为
    Figure PCTCN2017072683-appb-100072
    中的正整数，a1,a2....,am不完全相同。
  25. 一种终端设备，其特征在于，包括：接收模块、处理模块和发送模块；
    所述处理模块，用于根据所述接收模块接收的接入网设备下发的参考信号确定预编码矩阵W，W满足W＝W1×W2；
    所述发送模块，用于向所述接入网设备发送信道状态信息CSI，所述CSI包括第一预编码矩阵指示PMI和第二PMI，W1对应于所述第一PMI，W2对应于所述第二PMI，所述第二PMI用于指示W2的部分列向量，所述W的秩大于或者等于2。
  26. 根据权利要求25所述的终端设备，其特征在于，所述第二PMI包括：W2中的
    Figure PCTCN2017072683-appb-100073
    列的列向量中除第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
    Figure PCTCN2017072683-appb-100074
    个列向量与所述
    Figure PCTCN2017072683-appb-100075
    列的列向量具有预设的关联关系，所述N为W2的列数，所述第一元素为所述
    Figure PCTCN2017072683-appb-100076
    列的列向量中保持不变的元素。
  27. 根据权利要求26所述的终端设备，其特征在于，所述第二PMI具体包括：W2的前
    Figure PCTCN2017072683-appb-100077
    列列向量中除所述第一元素外的其他每个元素被量化后的量化值的索引，其中，W2中的剩余
    Figure PCTCN2017072683-appb-100078
    个列向量与所述前
    Figure PCTCN2017072683-appb-100079
    列列向量具有预设的关联关系。
  28. 根据权利要求25所述的终端设备，其特征在于，所述第二PMI还用于指示所述部分列向量与W2中除所述部分列向量的剩余列向量的关联关系。
  29. 根据权利要求28所述的终端设备，其特征在于，所述第二PMI包括：W2中的
    Figure PCTCN2017072683-appb-100080
    列的列向量除第一元素外的其他每个元素被量化后的量化值的索引，以及，W2中的剩余
    Figure PCTCN2017072683-appb-100081
    个列向量与所述
    Figure PCTCN2017072683-appb-100082
    列的列向量的关系，所述N为W2的列数，所述第一元素为所述
    Figure PCTCN2017072683-appb-100083
    列的列向量中保持不变的元素。
  30. 根据权利要求29所述的终端设备，其特征在于，所述第二PMI具体包括：
    W2的前
    Figure PCTCN2017072683-appb-100084
    列列向量中除所述第一元素外的其他每个元素被量化后的量化值的索引，以及W2中的剩余
    Figure PCTCN2017072683-appb-100085
    个列向量与所述前
    Figure PCTCN2017072683-appb-100086
    列列向量的关联关系。
  31. 根据权利要求27或30所述的终端设备，其特征在于，所述W2中的剩余
    Figure PCTCN2017072683-appb-100087
    个列向量与所述前
    Figure PCTCN2017072683-appb-100088
    列列向量的关联关系，具体包括：
    W2中的第
    Figure PCTCN2017072683-appb-100089
    列列向量的元素与第k列列向量的元素之间的相位关联关系，所述k为
    Figure PCTCN2017072683-appb-100090
    中的正整数。
  32. 根据权利要求31所述的终端设备，其特征在于，W2为M行N列的矩阵,其中M是偶数，则所述W2中的第
    Figure PCTCN2017072683-appb-100091
    列列向量的元素与第k列列向量的元素之间的相位关联关系，具体包括：
    Figure PCTCN2017072683-appb-100092
    其中，cm,k为W2中第m行第k列的元素，
    Figure PCTCN2017072683-appb-100093
    为W2中第m行第
    Figure PCTCN2017072683-appb-100094
    列的元素，
    Figure PCTCN2017072683-appb-100095
    m为[1,M]中的正整数，p为
    Figure PCTCN2017072683-appb-100096
    中的正整数，a1,a2....,am不完全相同。
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Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
CN109150266A (zh) * 2017-06-16 2019-01-04 华为技术有限公司 信道状态信息的传输方法、接入网设备和终端设备
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101834708A (zh) * 2010-04-30 2010-09-15 中兴通讯股份有限公司 一种信道信息的获取方法及装置
CN101969363A (zh) * 2010-09-30 2011-02-09 中兴通讯股份有限公司 信道状态信息反馈方法及终端
US20120219042A1 (en) * 2010-04-30 2012-08-30 Texas Instruments Incorporated Transmission Modes and Signaling for Uplink MIMO Support or Single TB Dual-Layer Transmission in LTE Uplink
CN105519030A (zh) * 2014-04-30 2016-04-20 华为技术有限公司 通信系统中进行快速链路自适应的装置与计算机程序产品

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101715939B1 (ko) * 2009-06-18 2017-03-14 엘지전자 주식회사 채널 상태 정보 피드백 방법 및 장치
KR101231487B1 (ko) * 2010-06-03 2013-02-07 (주)휴맥스 차분 선부호화 방법 및 그 방법을 지원하는 기지국
EP3651375A1 (en) * 2012-06-14 2020-05-13 Huawei Technologies Co., Ltd. Method for determining precoding matrix indicator, user equipment, and base station evolved node b
EP3855638B1 (en) * 2012-12-27 2022-09-28 Huawei Technologies Co., Ltd. Method for feeding back channel state information, user equipment, and base station
WO2014169421A1 (zh) * 2013-04-15 2014-10-23 华为技术有限公司 一种报告信道状态信息的方法、用户设备和基站
KR102160008B1 (ko) * 2013-06-17 2020-09-25 삼성전자 주식회사 채널 상태 정보 송수신 방법 및 장치
US20150288499A1 (en) * 2014-04-07 2015-10-08 Samsung Electronics Co., Ltd. Periodic and aperiodic channel state information reporting for advanced wireless communication systems
CN106209195B (zh) * 2015-03-06 2020-02-11 电信科学技术研究院 信道状态信息获取方法、信道状态信息反馈方法及装置
CN106302269B (zh) 2015-06-04 2020-06-23 电信科学技术研究院 一种信道状态信息的反馈及其控制方法及装置
CN106330272A (zh) 2015-06-30 2017-01-11 北京三星通信技术研究有限公司 预编码矩阵指示的发送、接收方法及设备
EP3364551A4 (en) * 2015-11-07 2018-10-17 Huawei Technologies Co., Ltd. Method and device for measuring and feeding back channel state information (csi)
US10396866B2 (en) 2016-11-11 2019-08-27 Samsung Electronics Co., Ltd. Advanced CSI reporting in advanced wireless communication systems
CN109150266A (zh) * 2017-06-16 2019-01-04 华为技术有限公司 信道状态信息的传输方法、接入网设备和终端设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101834708A (zh) * 2010-04-30 2010-09-15 中兴通讯股份有限公司 一种信道信息的获取方法及装置
US20120219042A1 (en) * 2010-04-30 2012-08-30 Texas Instruments Incorporated Transmission Modes and Signaling for Uplink MIMO Support or Single TB Dual-Layer Transmission in LTE Uplink
CN101969363A (zh) * 2010-09-30 2011-02-09 中兴通讯股份有限公司 信道状态信息反馈方法及终端
CN105519030A (zh) * 2014-04-30 2016-04-20 华为技术有限公司 通信系统中进行快速链路自适应的装置与计算机程序产品

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