WO2019148399A1 - 上报信道状态信息csi的方法和装置 - Google Patents

上报信道状态信息csi的方法和装置 Download PDF

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Publication number
WO2019148399A1
WO2019148399A1 PCT/CN2018/074837 CN2018074837W WO2019148399A1 WO 2019148399 A1 WO2019148399 A1 WO 2019148399A1 CN 2018074837 W CN2018074837 W CN 2018074837W WO 2019148399 A1 WO2019148399 A1 WO 2019148399A1
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WIPO (PCT)
Prior art keywords
communication device
time unit
csi
pmi
reference time
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PCT/CN2018/074837
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English (en)
French (fr)
Inventor
张瑞齐
李雪茹
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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 PCT/CN2018/074837 priority Critical patent/WO2019148399A1/zh
Priority to CN201980007743.2A priority patent/CN111587542B/zh
Priority to PCT/CN2019/073882 priority patent/WO2019149216A1/zh
Priority to EP19747255.8A priority patent/EP3736997B1/en
Priority to EP23175684.2A priority patent/EP4250620A3/en
Publication of WO2019148399A1 publication Critical patent/WO2019148399A1/zh
Priority to US16/943,347 priority patent/US11290164B2/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
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0486—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking channel rank into account
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]

Definitions

  • the present application relates to the field of communications, and in particular, to a method and apparatus for reporting channel state information CSI in the field of communications.
  • MIMO Multiple-input multiple-output
  • TDD time division duplexing
  • TDD time division duplexing
  • TDD time division duplexing
  • the terminal device feedback CSI is sensitive to the delay, especially for the terminal device with higher moving speed. Since the CSI reflects the channel state at the measurement time, if the movement of the terminal device causes the channel change, the CSI received by the network device It does not fully reflect the channel state at the current moment. In this case, if the network device directly applies the CSI fed back by the terminal device, the matching degree between the CSI and the current time channel is decreased, which affects data transmission performance.
  • the present application provides a method and apparatus for reporting CSI, which is beneficial to improving the matching degree between a CSI applied by a network device and a channel at a current time, thereby improving data transmission performance.
  • a method for reporting CSI comprising: a first communication device receiving a reference signal from a second communication device; the first communication device performing channel measurement based on the reference signal, in a time unit identified as m Transmitting, to the second communication device, a first CSI, where the first CSI is used to indicate channel states on the first reference time unit and the second reference time unit; wherein the identifier of the first reference time unit is mn 1 .
  • the identifier of the second reference time unit is mn 1 -n 2 , m, n 1 and n 2 are integers, and n 2 is not equal to zero.
  • the first communication device may feed back the channel state of at least two time units to the second communication device in one CSI feedback, so that the second communication device estimates the CSI to be applied, It is beneficial to improve the matching degree between the CSI applied by the second communication device and the channel at the current time, thereby improving the data transmission performance.
  • mn 1 is not equal to mn 1 -n 2 , that is, the first reference time unit and the second reference time unit are different.
  • the time unit may be a frame, a slot, or a symbol, which is not limited in this embodiment of the present application. Therefore, the identifier of the time unit may be an identifier of a subframe, a time slot or a symbol, and the identifier of the symbol is taken as an example.
  • the identifier of the symbol It can be 0 to 6 (or 1 to 7) or 0 to 13 (or 1 to 14).
  • the identifiers of the time units are cyclical. For example, in each resource unit, the identifiers of the symbols are 0 to 13. For multiple resource units, the identifiers of the symbols are 0 to 13, 0 to 13 in sequence. ,..., 0 ⁇ 13, etc. If the identifier of a certain time unit is a negative value, the time unit is a time unit corresponding to the corresponding value recursively forwarded from the resource unit corresponding to the current time. For example, according to the above definition, the identifier of a certain time unit may be -2.
  • the pre-recursive, time unit identified as -2 represents the time unit identified as 12 in the first resource unit.
  • m is an integer, indicating the identifier of the time unit of the current CSI reporting time
  • mn 1 and mn 1 -n 2 may be a positive integer or a negative integer, which is not limited in this embodiment of the present application.
  • the foregoing reference time unit may be represented by a reference resource, where the reference resource may include a time domain resource and a frequency domain resource, where the time domain resource is the reference time unit, but the embodiment of the present application This is not limited.
  • the foregoing first communication device may be a terminal device, and the second communication device may be a network device, but the embodiment of the present application does not limit this.
  • the reference signal is a channel state indication-reference signal (CSI-RS).
  • the structure of the single codebook may be adopted, or the structure of the dual codebook, that is, the two-level codebook, may be used.
  • the superscript (1) represents the parameter corresponding to the first reference time unit
  • the superscript (2) represents the parameter corresponding to the second reference time unit
  • the other superscripts are similar, and are not enumerated here.
  • the first CSI includes a first precoding matrix indicating PMI, a second PMI, and a third PMI; wherein the first PMI is used to indicate the a matrix W 1 corresponding to the first reference time unit and the second reference time unit, where the second PMI is used to indicate a matrix corresponding to the first reference time unit The third PMI is used to indicate a matrix corresponding to the second reference time unit The precoding matrix corresponding to the first reference time unit is satisfied The precoding matrix corresponding to the second reference time unit is satisfied
  • a pre-coding matrix indicator is used to indicate, from a predefined codebook, a precoding matrix used when data transmission is recommended by the first communication device.
  • the first CSI may include a first PMI, a second PMI, and a third PMI.
  • PMI for indicating a first matrix W 1, W 1 in the first cell time reference and the second reference time units are suitable.
  • the second PMI is used to indicate a matrix corresponding to the first reference time unit
  • the third PMI is used to indicate a matrix corresponding to the second reference time unit
  • W 1 may be calculated and Calculating a precoding matrix W (1) of the first reference time unit, according to W 1 and A precoding matrix W (2) of the second reference time unit is calculated. Since W 1 is the same over the entire communication bandwidth, the first communication device can perform CSI feedback through the above-described dual codebook structure to reduce feedback overhead.
  • the foregoing third PMI may be directly used to indicate a matrix corresponding to the second reference time unit. Can also be used to indicate the matrix And matrix
  • the relative value of the amplitude and/or the relative value of the phase are not limited in this embodiment of the present application. It should be understood, however, that the relative value of the amplitude and/or the relative value of the phase can be used to further save the CSI feedback overhead of the first communication device.
  • matrix And matrix For a matrix of 2l rows and N columns, both l and N are positive integers. According to the form of representation, with It can be divided into a first type codebook and a second type codebook.
  • the nth column representation is The nth column representation is Where n ⁇ 1,2,...,N-1 ⁇ , e k is a column vector of l ⁇ 1, the kth element is 1 and the remaining elements are 0. with Both are complex numbers with a modulus of 1, which can be expressed as among them Representing plural Phase, Representing plural The phase.
  • the present codes for a first type the third PMI for a relative value ⁇ c n indicates the phase of the phase of relative value for indicating the specific ⁇ c n Said In the nth column With the stated Coefficient of the corresponding position The relative value between.
  • the third PMI is used to indicate a relative value of the amplitude ⁇ p x, y, z , a relative value of the amplitude ⁇ p x , y, z are specifically used to indicate the Amplitude coefficient of the yth column in the x ⁇ l+z row With the stated Amplitude coefficient of the corresponding position Relative value between; and/or
  • the matrix with Both are 2l rows and N columns of matrix, l and N are positive integers, x and z represent with Line number, y with The column number, x ⁇ 0,1 ⁇ , z ⁇ 1,2,...,l ⁇ ,y ⁇ 1,2,...,N ⁇ .
  • the relative value may represent a subtraction operation, and may also represent a division operation, that is, the relative value of the amplitude ⁇ p x, y, z may be versus The difference between them can also be versus The relative value ⁇ c x, y, z of the phase is similar, which is not limited by the embodiment of the present application.
  • the specific calculation method requires a protocol agreement or is configured by the second communication device to the first communication device through signaling.
  • the first communication device may feed back the second CSI to the second communication device, in addition to feeding back the first CSI to the second communication device, where the second CSI is used to indicate the time marked as q.
  • the channel status on the unit may be obtained by the first communication device performing channel measurement prediction according to the reference signal, or may be predicted by the first communication device according to the first CSI, which is not used by the embodiment of the present application. limited.
  • the method further includes: the first communications device determining, according to the second PMI and the third PMI, a time unit corresponding to the identifier q matrix
  • the precoding matrix corresponding to the time unit identified as q satisfies matrix a matrix of 2' rows of N' columns, q being a positive integer greater than mn 1 and mn 1 -n 2 , N' being a positive integer;
  • the first communication device according to the Determining a second CQI on the time unit identified as q; the first communication device transmitting a second CSI to the second communication device, the second CSI including the second CQI.
  • the first communications device may determine, according to the second PMI and the third PMI included in the first CSI, a matrix corresponding to the time unit identified as q According to A second CQI on the time unit identified as q is determined, and then the second CQI is transmitted to the second communication device.
  • matrix A matrix of 2' rows of N' columns.
  • Y represents the ratio of the difference between the identifier of the identifier q and the first reference time unit and the difference between the identifier of the first reference time unit and the identifier of the second reference time unit, y' ⁇ ⁇ 1, 2, ... N' ⁇ , N' ⁇ N.
  • Y represents the ratio of the difference between the identifier of the identifier q and the first reference time unit and the difference between the identifier of the first reference time unit and the identifier of the second reference time unit, y' ⁇ ⁇ 1, 2, ... N' ⁇ , N' ⁇ N.
  • Y represents the ratio of the difference between the identifier of the identifier q and the first reference time unit and the difference between the identifier of the first reference time unit and the identifier of the second reference time unit, y' ⁇ ⁇ 1, 2, ... N' ⁇ , N' ⁇ N.
  • Y represents the ratio of the difference between the identifier of the identifier q and the first reference time unit and the difference between the identifier of the first reference time unit and the identifier of the second reference time unit, y' ⁇ ⁇ 1, 2, ... N' ⁇ , N' ⁇ N.
  • the first CSI includes a fourth PMI and a fifth PMI, where the fourth PMI is used to indicate a pre-corresponding to the first reference time unit.
  • An encoding matrix W (1) the fifth PMI is used to indicate a precoding matrix W (2) corresponding to the second reference time unit.
  • the first CSI may comprise a direct indication of W (1) and a fourth for indicating the PMI W (2) a fifth PMI.
  • the first communication device reports the first CSI to the second communication device by using the single codebook structure, and after receiving the first CSI, the second communication device may directly determine the precoding matrix corresponding to the first reference time unit according to the first CSI.
  • the precoding matrix W (2) corresponding to W (1) and the second reference time unit reduces the computational complexity of the second communication device.
  • the fifth PMI indicates a relative value of coefficient ⁇ w r, t, relative values of the coefficients ⁇ w r, t W denotes a specifically for (2) The coefficient of the tth column in the rth row Coefficient with the corresponding position in the W (1) The relative value between them; where matrix W (1) and W (2) are both N t rows and N columns, N t and N are positive integers, and r represents W (1) and W (2) rows The number t represents the column numbers of W (1) and W (2) , r ⁇ ⁇ 1, 2, ..., N t ⁇ , t ⁇ ⁇ 1, 2, ..., N ⁇ .
  • the relative value may represent a subtraction operation, and may also represent a division operation, that is, a relative value of the coefficient ⁇ w r, t may be versus The difference between them can also be versus The ratio between the two.
  • the specific calculation method requires a protocol agreement or is configured by the second communication device to the first communication device through signaling.
  • the method further includes: determining, by the first communications device, a matrix corresponding to a time unit identified as q according to the fourth PMI and the fifth PMI matrix N t rows of N 'columns of the matrix, q is a positive integer and mn 1 mn 1 -n 2; the first communication means in accordance with the Determining a second CQI on the time unit identified as q; the first communication device transmitting a second CSI to the second communication device, the second CSI including the second CQI.
  • the method further comprising: the first communication device receiving configuration information from the second communication device, the configuration information being used to indicate the second The CSI is dependent on the first CSI; the first communication device determines, according to the second PMI and the third PMI, a matrix corresponding to a time unit identified as q
  • the method includes: the first communication device determines the according to the configuration information, the second PMI, and the third PMI
  • the second communications device may send configuration information to the first communications device, indicating that the second CSI is dependent on the first CSI, such that the first communications device may follow the second PMI and the third included in the first CSI.
  • PMI calculation Thereby the second CQI is calculated.
  • the foregoing configuration information may be a CSI reporting index.
  • the method before the first communication device receives the reference signal from the second communication device, the method further comprises: the first communication device from the second communication device Receiving first indication information, the first indication information is used to indicate transmission of at least two reference signals; and the first communication device receives the reference signal from the second communication device, including: the first communication device according to the An indication information, the first reference signal and the second reference signal are received from the second communication device, the first reference signal is used to measure a channel state of the first reference time unit, and the second reference signal is used for A channel state of the second reference time unit is measured.
  • one trigger signaling of the second communication device may trigger transmission of at least two reference signals.
  • the second communication device may send first indication information to the first communication device for indicating transmission of the at least two reference signals, and the second communication device sends the first reference signal and the second reference signal to the first communication device.
  • the first communication device measures the channel state on the first reference time unit by using the first reference signal, measures the channel state on the second reference time unit by using the second reference signal, and combines the channel state and the channel on the first reference time unit. And referring to the channel state on the time unit, reporting the first CSI to the second communications device, where the CSI does not include a CSI-RS resource indication (CRI).
  • CRI CSI-RS resource indication
  • the method further includes: the first communication device transmitting second indication information to the second communication device, the second indication information being used to indicate Whether the first CSI is available.
  • the first communications device may further send, to the second communications device, second indication information, to indicate whether the first CSI is available, and when the second communications device receives the second indication information, indicating that the first CSI is unavailable, It may be determined that the first communication device no longer calculates the second CSI according to the first CSI, or the second communication device no longer performs channel prediction according to the first CSI. Further, the first communication device may specifically indicate that the first CSI is unavailable after a certain time in the second indication information, which is not limited by the embodiment of the present application.
  • the first CSI is sent by the first communications device at a reporting time in a first reporting period, where The second CSI is sent by the first communication device at a reporting time in the second reporting period, and the first reporting period is greater than the second reporting period.
  • the CSI reporting is divided into two types of reporting modes: periodic CSI reporting and aperiodic CSI reporting.
  • two types of CSI are reported, where the first type of CSI includes an RI, a first PMI, a second PMI, a third PMI, and a CQI, and the second type of CSI includes a CQI or includes a CQI and an RI, and does not include the first PMI.
  • the second PMI and the third PMI, in the periodic CSI reporting mode the first type of CSI may correspond to a longer reporting period (ie, the first reporting period), and the second type of CSI may correspond to a shorter reporting period ( That is, the second reporting period).
  • the current second type CSI may be reported before the periodic point and the current The second type of CSI reported by the CSI reporting period of the second type of CSI is used as a reference to calculate the second type of CSI that needs to be reported, but the embodiment of the present application does not limit this.
  • the value of the n 1 is protocol-agreeted or the second communication device is configured for the first communication device by signaling; and/or The value of the n 2 is agreed by the protocol or the second communication device is configured by the first communication device by signaling.
  • a second communication device transmitting a reference signal to a first communication device; the second communication device receiving the first communication device in accordance with the reference signal, identifying a first CSI transmitted on a time unit of m, the first CSI being used to indicate a channel state on the first reference time unit and the second reference time unit; wherein the identifier of the first reference time unit is mn 1
  • the identifier of the second reference time unit is mn 1 -n 2 , m, n 1 and n 2 are integers, and n 2 is not equal to zero.
  • the first communication device may feed back the channel state of at least two time units to the second communication device in one CSI feedback, so that the second communication device estimates the CSI to be applied, It is beneficial to improve the matching degree between the CSI applied by the second communication device and the channel at the current time, thereby improving the data transmission performance.
  • the first CSI includes a first precoding matrix indicating PMI, a second PMI, and a third PMI; wherein the first PMI is used to indicate the a matrix W 1 corresponding to the first reference time unit and the second reference time unit, where the second PMI is used to indicate a matrix corresponding to the first reference time unit The third PMI is used to indicate a matrix corresponding to the second reference time unit The precoding matrix corresponding to the first reference time unit is satisfied The precoding matrix corresponding to the second reference time unit is satisfied
  • the third PMI for a relative value ⁇ c n indicates the phase of the phase of relative value for indicating the specific ⁇ c n In the nth column With the stated Coefficient of the corresponding position
  • the relative value between, n ⁇ ⁇ 1, 2, ..., N-1 ⁇ , N is a positive integer.
  • the third PMI is used to indicate a relative value of the amplitude ⁇ p x, y, z , and the relative value of the amplitude ⁇ p x, y, z is specifically used for Indicates the stated Amplitude coefficient of the yth column in the x ⁇ l+z row With the stated Amplitude coefficient of the corresponding position Relative value between; and/or
  • the matrix with Both are 2l rows and N columns of matrix, l and N are positive integers, x and z represent with Line number, y with The column number, x ⁇ 0,1 ⁇ , z ⁇ 1,2,...,l ⁇ ,y ⁇ 1,2,...,N ⁇ .
  • the method further comprising: the second communications device receiving a second CSI from the first communications device, the second CSI comprising a second CQI,
  • the second CQI is a matrix corresponding to a time unit identified as q Determining that the precoding matrix corresponding to the time unit of the identifier q is satisfied matrix
  • N' is a positive integer.
  • Y represents the ratio of the difference between the identifier of the identifier q and the first reference time unit and the difference between the identifier of the first reference time unit and the identifier of the second reference time unit, y' ⁇ ⁇ 1, 2, ... N' ⁇ , N' ⁇ N.
  • Y represents the ratio of the difference between the identifier of the identifier q and the first reference time unit and the difference between the identifier of the first reference time unit and the identifier of the second reference time unit, y' ⁇ ⁇ 1, 2, ... N' ⁇ , N' ⁇ N.
  • Y represents the ratio of the difference between the identifier of the identifier q and the first reference time unit and the difference between the identifier of the first reference time unit and the identifier of the second reference time unit, y' ⁇ ⁇ 1, 2, ... N' ⁇ , N' ⁇ N.
  • Y represents the ratio of the difference between the identifier of the identifier q and the first reference time unit and the difference between the identifier of the first reference time unit and the identifier of the second reference time unit, y' ⁇ ⁇ 1, 2, ... N' ⁇ , N' ⁇ N.
  • the first CSI includes a fourth PMI and a fifth PMI, where the fourth PMI is used to indicate a pre-corresponding to the first reference time unit.
  • An encoding matrix W (1) the fifth PMI is used to indicate a precoding matrix W (2) corresponding to the second reference time unit.
  • the fifth PMI indicates a relative value of coefficient ⁇ w r, t, relative values of the coefficients ⁇ w r, t W denotes a specifically for (2) The coefficient of the tth column in the rth row Coefficient with the corresponding position in the W (1) The relative value between them; where matrix W (1) and W (2) are both N t rows and N columns, N t and N are positive integers, and r represents W (1) and W (2) rows The number t represents the column numbers of W (1) and W (2) , r ⁇ ⁇ 1, 2, ..., N t ⁇ , t ⁇ ⁇ 1, 2, ..., N ⁇ .
  • the method further comprising: the second communication device transmitting configuration information to the first communication device, the configuration information being used to indicate the second The CSI is dependent on the first CSI.
  • the method before the second communication device transmits the reference signal to the first communication device, the method further includes: the second communication device to the first The communication device sends first indication information, where the first indication information is used to indicate transmission of at least two reference signals; and the second communication device sends a reference signal to the first communication device, including: the second communication device The first communication device transmits a first reference signal for measuring a channel state of the first reference time unit, and a second reference signal for measuring the second reference The channel state of the time unit.
  • the method further comprising: the second communication device receiving second indication information from the first communication device, the second indication information being used to indicate Whether the first CSI is available.
  • the first CSI is sent by the first communications device at a reporting time in a first reporting period, where The second CSI is sent by the first communication device at a reporting time in the second reporting period, and the first reporting period is greater than the second reporting period.
  • the value of the n 1 is protocol-agreeted or the second communication device is configured by the first communication device by signaling; and/or The value of the n 2 is agreed by the protocol or the second communication device is configured by the first communication device by signaling.
  • a third aspect there is provided another method of reporting CSI, comprising: a first communication device receiving a reference signal from a second communication device; the first communication device performing channel measurement based on the reference signal at a time identified as K Transmitting, to the second communication device, a third CSI, where the third CSI is used to indicate a channel state on the third reference time unit; wherein the identifier of the third reference time unit is K+n 3 , K As an integer, n 3 is a positive integer.
  • the first communications device may feed back a third CSI to the second communications device on a time unit identified as K, where the third CSI indicates a third reference time unit identified as K+n 3
  • the channel state so that the second communication device directly acquires the latest channel state, is beneficial to improve the matching degree between the CSI applied by the second communication device and the channel at the current time, thereby improving the data transmission performance.
  • the method before the first communication device receives the reference signal from the second communication device, the method further comprises: the first communication device from the second communication device Receiving third indication information, the third indication information is used to indicate transmission of at least two reference signals; and the first communication device receives the reference signal from the second communication device, including: the first communication device according to the The third indication information, the third reference signal and the fourth reference signal are received from the second communication device; the method further includes: the first communication device determining, according to the third reference signal and the fourth reference signal The third CSI.
  • the first communications device receives fourth indication information, where the fourth indication information is used to indicate a time domain location of the at least two reference signals, The time domain position of each of the at least two reference signals is different.
  • the second communications device may send fourth indication information for the first communications device to indicate a time domain location (eg, a CSI-RS resource) of the at least two reference signals.
  • a time domain location eg, a CSI-RS resource
  • the third CSI reported by the first communications apparatus may include the RI, the PMI, and the CQI, but does not include the reference signal resource indication (CSI).
  • CSI reference signal resource indication
  • CRI reference signal resource indication
  • an apparatus for reporting CSI for performing the method of the first aspect or any possible implementation of the first aspect.
  • the apparatus comprises means for performing the method of any of the above-described first aspect or any of the possible implementations of the first aspect.
  • the apparatus comprises means for performing the method of any of the possible implementations of the second aspect or the second aspect described above.
  • the apparatus comprises means for performing the method of any of the possible implementations of the third aspect or the third aspect described above.
  • a seventh aspect there is provided another apparatus for reporting CSI, the apparatus comprising: a transceiver, a memory, and a processor.
  • the transceiver, the memory and the processor are in communication with each other via an internal connection path for storing instructions for executing instructions stored in the memory to control the receiver to receive signals and to control the transmitter to transmit signals And when the processor executes the instructions stored by the memory, causing the processor to perform the method of the first aspect or any of the possible implementations of the first aspect.
  • another apparatus for reporting CSI comprising: a transceiver, a memory, and a processor.
  • the transceiver, the memory and the processor are in communication with each other via an internal connection path for storing instructions for executing instructions stored in the memory to control the receiver to receive signals and to control the transmitter to transmit signals And when the processor executes the instructions stored by the memory, causing the processor to perform the method of any of the possible implementations of the second aspect or the second aspect.
  • another apparatus for reporting CSI comprising: a transceiver, a memory, and a processor.
  • the transceiver, the memory and the processor are in communication with each other via an internal connection path for storing instructions for executing instructions stored in the memory to control the receiver to receive signals and to control the transmitter to transmit signals And when the processor executes the instructions stored by the memory, causing the processor to perform the method of any of the possible implementations of the third aspect or the third aspect.
  • a computer program product comprising: computer program code, when the computer program code is executed by a computer, causing the computer to perform the method of the above aspects.
  • a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of the above aspects.
  • a chip system includes: an input interface, an output interface, at least one processor, and a memory, wherein the input interface, the output interface, the processor, and the memory are connected by an internal connection path,
  • the processor is operative to execute code in the memory, the processor being operative to perform the method of the above aspects when the code is executed.
  • FIG. 1 shows a schematic diagram of a communication system of an embodiment of the present application.
  • FIG. 2 shows a schematic flowchart of a method for reporting CSI according to an embodiment of the present application.
  • FIG. 3 shows a schematic flowchart of another method for reporting CSI according to an embodiment of the present application.
  • FIG. 4 shows a schematic block diagram of an apparatus for reporting CSI according to an embodiment of the present application.
  • FIG. 5 shows a schematic block diagram of another apparatus for reporting CSI according to an embodiment of the present application.
  • FIG. 6 shows a schematic block diagram of another apparatus for reporting CSI according to an embodiment of the present application.
  • FIG. 7 shows a schematic block diagram of another apparatus for reporting CSI according to an embodiment of the present application.
  • FIG. 8 shows a schematic block diagram of another apparatus for reporting CSI according to an embodiment of the present application.
  • FIG. 9 shows a schematic block diagram of another apparatus for reporting CSI according to an embodiment of the present application.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA Wideband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • FDD LTE frequency division duplex
  • TDD LTE time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • SCMA sparse code multiple access
  • SCMA sparse code multiple access
  • OFDM Orthogonal frequency division multiplexing
  • FBMC filter bank multi-carrier
  • GFDM generalized frequency division multiplexing
  • filtered-OFDM, F-OFDM filtered-OFDM, F-OFDM
  • the terminal device may communicate with one or more core networks via a radio access network (RAN), and the terminal device may be referred to as an access terminal and a user equipment (user Equipment, UE), subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user equipment.
  • the access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication.
  • PLMN public land mobile network
  • the network device may be used to communicate with the terminal device, where the network device may be a base transceiver station (BTS) in a GSM system or a CDMA system, or may be a base station in a WCDMA system ( Node B, NB), may also be an evolved base station (evolutional node B, eNB or eNode B) in the LTE system, or the network device may be a relay station, an access point, an in-vehicle device, a wearable device, or a future 5G network.
  • BTS base transceiver station
  • Node B, NB Node B
  • eNB evolved base station
  • the network device may be a relay station, an access point, an in-vehicle device, a wearable device, or a future 5G network.
  • Network side device or network device in a future evolved PLMN network may be used to communicate with the terminal device, where the network device may be a base transceiver station (BTS) in a GSM system
  • the embodiments of the present application can be applied to an LTE system and a subsequent evolved system, such as 5G, or other wireless communication systems using various radio access technologies, such as using code division multiple access, frequency division multiple access, time division multiple access, and orthogonal.
  • a system of access frequency division multiple access, single carrier frequency division multiple access, etc. is particularly suitable for scenarios requiring channel information feedback and/or applying secondary precoding techniques, such as a wireless network using Massive MIMO technology, and a distributed antenna for application.
  • MIMO multiple-input multiple-output
  • Antenna transmission and reception improve communication quality. It can make full use of space resources and achieve multiple transmission and reception through multiple antennas. It can multiply the system channel capacity without increasing spectrum resources and antenna transmission power.
  • MIMO can be divided into single-user MIMO (SU-MIMO) and multi-user MIMO (MU-MIMO).
  • SU-MIMO single-user MIMO
  • MU-MIMO multi-user MIMO
  • Massive MIMO arranges hundreds of antennas at the transmitting end, modulates the respective beams for dozens of target receivers, and transmits dozens of signals simultaneously on the same frequency resource through spatial signal isolation. Therefore, Massive MIMO technology can make full use of the spatial freedom brought by large-scale antenna configuration to improve spectrum efficiency.
  • the communication system 100 includes a network device 102, which may include multiple antenna groups.
  • Each antenna group may include one or more antennas, for example, one antenna group may include antennas 104 and 106, another antenna group may include antennas 108 and 110, and an additional group may include antennas 112 and 114.
  • Two antennas are shown in Figure 1 for each antenna group, although more or fewer antennas may be used for each group.
  • Network device 102 may additionally include a transmitter chain and a receiver chain, as will be understood by those of ordinary skill in the art, which may include various components related to signal transmission and reception, such as processors, modulators, multiplexers, solutions. Tuner, demultiplexer or antenna.
  • Network device 102 can communicate with a plurality of terminal devices, for example, network device 102 can communicate with terminal device 116 and terminal device 122. However, it will be appreciated that network device 102 can communicate with any number of terminal devices similar to terminal device 116 or 122.
  • Terminal devices 116 and 122 may be, for example, cellular telephones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable for communicating over wireless communication system 100. device.
  • terminal device 116 is in communication with antennas 112 and 114, wherein antennas 112 and 114 transmit information to terminal device 116 over forward link 118 and receive information from terminal device 116 over reverse link 120.
  • terminal device 122 is in communication with antennas 104 and 106, wherein antennas 104 and 106 transmit information to terminal device 122 over forward link 124 and receive information from terminal device 122 over reverse link 126.
  • forward link 118 may utilize a different frequency band than reverse link 120
  • forward link 124 may utilize a different frequency band than reverse link 126.
  • the forward link 118 and the reverse link 120 can use a common frequency band, and the forward link 124 and the reverse link 126 can be used in common. frequency band.
  • Each set of antennas and/or regions designed for communication is referred to as a sector of network device 102.
  • the antenna group can be designed to communicate with terminal devices in sectors of the network device 102 coverage area.
  • the transmit antenna of network device 102 may utilize beamforming to improve the signal to noise ratio of forward links 118 and 124.
  • the network device 102 uses beamforming to transmit signals to the randomly dispersed terminal devices 116 and 122 in the relevant coverage area, the network device 102 uses a single antenna to transmit signals to all of its terminal devices. Mobile devices are subject to less interference.
  • network device 102, terminal device 116, or terminal device 122 may be a wireless communication transmitting device and/or a wireless communication receiving device.
  • the wireless communication transmitting device can encode the data for transmission.
  • the wireless communication transmitting device may acquire a certain number of data bits to be transmitted to the wireless communication receiving device through a channel, for example, the wireless communication transmitting device may generate, receive from another communication device, or save in a memory, etc., to be transmitted through a channel.
  • a certain number of data bits to the wireless communication receiving device may be included in a transport block or a plurality of transport blocks of data, and the transport blocks may be segmented to produce a plurality of code blocks.
  • the communication system 100 may be a public land mobile network PLMN network or a device to device (D2D) network or a machine to machine (M2M) network or other network, and FIG. 1 is merely an example for convenience of understanding.
  • PLMN public land mobile network
  • D2D device to device
  • M2M machine to machine
  • FIG. 1 is merely an example for convenience of understanding.
  • a simplified schematic diagram of the network may also include other network devices, which are not shown in FIG.
  • Time unit can be a frame, a slot, or a symbol.
  • the identifier of the time unit may be an identifier of a subframe, a time slot, or a symbol.
  • the symbol identifier may be used as an example.
  • the identifier of the symbol may be 0 to 6 (or 1 to 7), and may be 0 to 13 (or 1 to 14).
  • the identifiers of the time units are cyclical. For example, in each resource unit, the identifiers of the symbols are 0 to 13. For multiple resource units, the identifiers of the symbols are 0 to 13, 0 to 13 in sequence. ,..., 0 ⁇ 13, etc. If the identifier of a certain time unit is a negative value, the time unit is a time unit corresponding to the corresponding value recursively forwarded from the resource unit corresponding to the current time. For example, according to the above definition, the identifier of a certain time unit may be -2. If the resource unit corresponding to the current time is the second resource unit of 0 to 13, 0 to 13, ..., 0 to 13, then The pre-recursive, time unit identified as -2 represents the time unit identified as 12 in the first resource unit.
  • FIG. 2 is a schematic flowchart of a method 200 for reporting CSI according to an embodiment of the present application.
  • the method 200 can be applied to the communication system 100 shown in FIG. 1, but the embodiment of the present application is not limited thereto.
  • the second communication device sends a reference signal to the first communication device.
  • the first communication device receives the reference signal from the second communication device.
  • the first communications device performs channel measurement according to the reference signal.
  • the first communications device sends first channel state information CSI to the second communications device on a time unit identified as m, where the first CSI is used to represent the first reference time unit and the second reference time unit.
  • the second communication device receives the first CSI sent by the first communication device; wherein the identifier of the first reference time unit is mn 1 , the second reference time
  • the identity of the unit is mn 1 -n 2 , m, n 1 and n 2 are integers, and n 2 is not equal to zero.
  • the second communication device may transmit a reference signal to the first communication device, the first communication device receives the reference signal and performs channel measurement, and feeds back the obtained first CSI to the second communication device.
  • the first communications device feeds back the first CSI to the second communications device on the time unit identified as m, and the first CSI is used to indicate the channel state of the first reference time unit identified as mn 1 And the channel state of the second reference time unit identified as mn 1 -n 2 .
  • the second communication device acquires the first CSI, and in the case that the channel changes, the second communication device may predict the channel state at other times according to the information carried in the first CSI, but the embodiment of the present application is This is not limited.
  • the first communication device feedback CSI is relatively sensitive to delay, especially for the first communication device with higher moving speed, since the CSI reflects the channel state at the measurement time, if the movement of the first communication device causes the channel The change, the CSI received by the second communication device does not fully reflect the channel state at the current time. In this case, if the second communication device directly applies the CSI fed back by the first communication device, the matching degree between the CSI and the channel at the current time is decreased, which affects the data transmission performance.
  • the first communication device may feed back the channel state of at least two time units to the second communication device in one CSI feedback, so that the second communication device pre-predicts the CSI to be applied. It is estimated that it is beneficial to improve the matching degree between the CSI applied by the second communication device and the channel at the current time, thereby improving the data transmission performance.
  • n 2 is not equal to zero
  • mn 1 is not equal to mn 1 -n 2 , that is, the first reference time unit and the second reference time unit are not the same.
  • m is an integer, indicating the identifier of the time unit of the current CSI reporting time
  • mn 1 and mn 1 -n 2 may be a positive integer or a negative integer. limited.
  • the foregoing reference time unit may be represented by a reference resource, where the reference resource may include a time domain resource and a frequency domain resource, where the time domain resource is the reference time unit, but the embodiment of the present application This is not limited.
  • the foregoing first communication device may be a terminal device, or may be a chip system disposed in the terminal device, and the second communication device may be a network device or a chip system disposed in the network device, but the present application The embodiment does not limit this.
  • the chip system may include an input interface, an output interface, at least one processor, and a memory. The input interface, the output interface, the processor, and the memory communicate with each other through an internal connection path, and the processor is configured to execute code in the memory.
  • the reference signal is a channel state indication-reference signal (CSI-RS).
  • CSI-RS channel state indication-reference signal
  • the signaling transmission between the first communication device and the second communication device may be a direct transmission or an indirect transmission, that is, the transmission is performed by the relay device. Therefore, the embodiment of the present application may also be applied to The application scenario of the relay device or the device-to-device (D2D) application scenario is not limited in this embodiment of the present application.
  • the structure of the single codebook may be adopted, or the structure of the dual codebook, that is, the two-level codebook, may be used.
  • the superscript (1) represents the parameter corresponding to the first reference time unit
  • the superscript (2) represents the parameter corresponding to the second reference time unit
  • the other superscripts are similar, and are not enumerated here.
  • the structure of the dual codebook will be described below.
  • the first CSI includes a first precoding matrix indicating PMI, a second PMI, and a third PMI, where the first PMI is used to indicate the first reference time unit and the a matrix W 1 corresponding to the second reference time unit, where the second PMI is used to indicate a matrix corresponding to the first reference time unit The third PMI is used to indicate a matrix corresponding to the second reference time unit The precoding matrix corresponding to the first reference time unit is satisfied The precoding matrix corresponding to the second reference time unit is satisfied
  • a pre-coding matrix indicator is used to indicate, from a predefined codebook, a precoding matrix used when data transmission is recommended by the first communication device.
  • the first CSI may include a first PMI, a second PMI, and a third PMI.
  • PMI for indicating a first matrix W 1, W 1 in the first cell time reference and the second reference time units are suitable.
  • the second PMI is used to indicate a matrix corresponding to the first reference time unit
  • the third PMI is used to indicate a matrix corresponding to the second reference time unit
  • W 1 may be calculated and Calculating a precoding matrix W (1) of the first reference time unit, according to W 1 and A precoding matrix W (2) of the second reference time unit is calculated. Since W 1 is the same over the entire communication bandwidth, the first communication device can perform CSI feedback through the above-described dual codebook structure to reduce feedback overhead.
  • the CSI fed back to the second communication device by the first communication device may also generally include parameters such as a rank indication (RI) and a channel quality indication (CQI).
  • RI represents the number of data layers recommended by the first communication device and simultaneously transmitted by the second communication device to the first communication device on the same time-frequency resource
  • CQI represents the channel quality of the first communication device, and is used for recommendation
  • the second communication device selects an appropriate modulation scheme and coding rate.
  • the foregoing third PMI may directly indicate a matrix corresponding to the second reference time unit Can also include matrices And matrix
  • the relative value of the amplitude and/or the relative value of the phase are not limited in this embodiment of the present application. It should be understood, however, that the relative value of the amplitude and/or the relative value of the phase can be used to further save the CSI feedback overhead of the first communication device.
  • the matrix And matrix For a matrix of 2l rows and N columns, both l and N are positive integers. According to the form of representation, with It can be divided into a first type codebook and a second type codebook.
  • the nth column representation is The nth column representation is Where n ⁇ ⁇ 1, 2, ..., N-1 ⁇ , e k is a column vector of l ⁇ 1, the kth element is 1, and the remaining elements are 1, with Both are complex numbers with a modulus of 1, which can be expressed as among them Representing plural Phase, Representing plural The phase.
  • the relative value for the third PMI ⁇ c n indicates the phase of the phase of relative value for indicating the specific ⁇ c n In the nth column With the stated Coefficient of the corresponding position The relative value between.
  • the second type of code present the third PMI for indicating the magnitude of the relative value ⁇ p x, y, z, amplitude of the relative value ⁇ p x, y, z represent a particularly Said Amplitude coefficient of the yth column in the x ⁇ l+z row With the stated Amplitude coefficient of the corresponding position Relative value between; and/or
  • the matrix with Both are 2l rows and N columns of matrix, l and N are positive integers, x and z represent with Line number, y with The column number, x ⁇ 0,1 ⁇ , z ⁇ 1,2,...,l ⁇ ,y ⁇ 1,2,...,N ⁇ .
  • the relative value may represent a subtraction operation, and may also represent a division operation, that is, the relative value of the amplitude ⁇ p x, y, z may be versus The difference between them can also be versus The relative value ⁇ c x, y, z of the phase is similar, which is not limited by the embodiment of the present application.
  • the specific calculation method requires a protocol agreement or is configured by the second communication device to the first communication device through signaling.
  • the first communication device may feed back the second CSI to the second communication device, in addition to feeding back the first CSI to the second communication device, where the second CSI is used to indicate the time marked as q.
  • the second CSI may be obtained by the first communication device performing channel measurement according to the reference signal, or may be predicted by the first communication device according to the first CSI, which is not limited by the embodiment of the present application. .
  • the method for predicting the second CSI by the first communication device based on the first CSI will be described in detail below.
  • the method further includes:
  • the precoding matrix corresponding to the time unit identified as q satisfies matrix a matrix of 2' rows of N' columns, q is a positive integer greater than mn 1 and mn 1 -n 2 , and N' is a positive integer;
  • the first communication device according to the Determining a second CQI on the time unit of the identifier q;
  • the first communication device transmits a second CSI to the second communication device, the second CSI including the second CQI.
  • the second communication device receives the second CSI from the first communication device.
  • the first communications device may determine, according to the second PMI and the third PMI included in the first CSI, a matrix corresponding to the time unit identified as q According to A second CQI on the time unit identified as q is determined, and then the second CQI is transmitted to the second communication device.
  • matrix A matrix of 2' rows of N' columns.
  • Y represents the ratio of the difference between the identifier of the identifier q and the first reference time unit and the difference between the identifier of the first reference time unit and the identifier of the second reference time unit, y' ⁇ ⁇ 1, 2, ... N' ⁇ , N' ⁇ N.
  • the first communication device calculates a matrix corresponding to the time unit identified as q May be based on the matrix indicated by the second PMI Amplitude coefficient of the y'th column in the x ⁇ l+z row And the relative value ⁇ p x,y′,z of the amplitude of the y′th column of the x ⁇ l+z row indicated by the third PMI is obtained Amplitude coefficient of the y'th column in the x ⁇ l+z row Similarly, the first communication device can also be based on the matrix indicated by the second PMI.
  • Phase coefficient of the y'th column in the x ⁇ l+z row And the relative value ⁇ c x,y′,z of the phase of the y′th column of the x ⁇ l+z row indicated by the third PMI is obtained Phase coefficient of the y'th column in the x ⁇ l+z row
  • Y represents the ratio of the difference between the identifier of the identifier q and the first reference time unit and the difference between the identifier of the first reference time unit and the identifier of the second reference time unit, y' ⁇ ⁇ 1, 2, ... N' ⁇ , N' ⁇ N.
  • the first communication device may determine, according to the foregoing formula, a matrix corresponding to the time unit identified as q according to the second PMI and the third PMI included in the first CSI. According to A second CQI on the time unit identified as q is determined, and then the second CQI is transmitted to the second communication device.
  • Y represents the ratio of the difference between the identifier of the identifier q and the first reference time unit and the difference between the identifier of the first reference time unit and the identifier of the second reference time unit, y' ⁇ ⁇ 1, 2, ... N' ⁇ , N' ⁇ N.
  • Y represents the ratio of the difference between the identifier of the identifier q and the first reference time unit and the difference between the identifier of the first reference time unit and the identifier of the second reference time unit, y' ⁇ ⁇ 1, 2, ... N' ⁇ , N' ⁇ N.
  • the first CSI includes a fourth PMI and a fifth PMI, where the fourth PMI is used to indicate a precoding matrix W (1) corresponding to the first reference time unit.
  • the fifth PMI is used to indicate a precoding matrix W (2) corresponding to the second reference time unit.
  • the first CSI may comprise a direct indication of W (1) and a fourth for indicating the PMI W (2) a fifth PMI.
  • the first communication device reports the first CSI to the second communication device by using the single codebook structure, and after receiving the first CSI, the second communication device may directly determine the precoding matrix corresponding to the first reference time unit according to the first CSI.
  • the precoding matrix W (2) corresponding to W (1) and the second reference time unit reduces the computational complexity of the second communication device.
  • the fifth PMI indicates a relative value of [Delta] w coefficients r, t, relative values of the coefficients ⁇ w r, t W denotes a specifically for r-th row (2) the first Coefficient of t column Coefficient with the corresponding position in the W (1) The relative value between them; where matrix W (1) and W (2) are both N t rows and N columns, N t and N are positive integers, and r represents W (1) and W (2) rows The number t represents the column numbers of W (1) and W (2) , r ⁇ ⁇ 1, 2, ..., N t ⁇ , t ⁇ ⁇ 1, 2, ..., N ⁇ .
  • the relative value may represent a subtraction operation, and may also represent a division operation, that is, a relative value of the coefficient ⁇ w r, t may be versus The difference between them can also be versus The ratio between the two.
  • the specific calculation method requires a protocol agreement or is configured by the second communication device to the first communication device through signaling.
  • the method further includes:
  • the first communication device according to the Determining a second CQI on the time unit of the identifier q;
  • the first communication device transmits a second CSI to the second communication device, the second CSI including the second CQI.
  • the second communication device receives the second CSI from the first communication device.
  • the method further includes:
  • the second communication device sends configuration information to the first communication device, where the configuration information is used to indicate that the second CSI is dependent on the first CSI;
  • the first communication device receives the configuration information from the second communication device
  • Determining, by the first communication device, a matrix corresponding to a time unit identified as q according to the second PMI and the third PMI include:
  • the second communication device may send configuration information to the first communication device to indicate that the second CSI is dependent on the first CSI.
  • the first communication device can calculate according to the second PMI and the third PMI included in the first CSI.
  • the second CQI is calculated.
  • the first communication device may calculate W (q) according to the fourth PMI and the fifth PMI included in the first CSI, thereby calculating the second CQI.
  • the foregoing configuration information may be a CSI reporting index.
  • the method before the first communication device receives the reference signal from the second communication device, the method further includes:
  • the second communication device sends first indication information to the first communication device, where the first indication information is used to indicate transmission of at least two reference signals; and correspondingly, the first communication device is from the first The second communication device receives the first indication information;
  • the transmitting, by the second communications device, the reference signal to the first communications device includes:
  • the second communication device sends a first reference signal and a second reference signal to the first communication device, where the first reference signal is used to measure a channel state of the first reference time unit, and the second reference signal Means for measuring a channel state of the second reference time unit;
  • the receiving, by the first communications device, the reference signal from the second communications device includes:
  • the first communication device receives the first reference signal and the second reference signal from the second communication device according to the first indication information.
  • one trigger signaling of the second communication device may trigger transmission of at least two reference signals.
  • the second communication device may send first indication information to the first communication device for indicating transmission of the at least two reference signals, and the second communication device sends the first reference signal and the second reference signal to the first communication device.
  • the first communication device measures the channel state on the first reference time unit by using the first reference signal, measures the channel state on the second reference time unit by using the second reference signal, and combines the channel state and the channel on the first reference time unit.
  • the channel state on the second reference time unit reports the first CSI to the second communication device.
  • the method further includes: the first communications device sends second indication information to the second communications device, where the second indicating information is used to indicate whether the first CSI is available;
  • the second communication device receives the second indication information from the first communication device.
  • the first communications device may further send, to the second communications device, second indication information, to indicate whether the first CSI is available, and when the second communications device receives the second indication information, indicating that the first CSI is unavailable, It may be determined that the first communication device no longer calculates the second CSI according to the first CSI, or the second communication device no longer performs channel prediction according to the first CSI. Further, the first communication device may specifically indicate that the first CSI is unavailable after a certain time in the second indication information, which is not limited by the embodiment of the present application.
  • the first CSI is sent by the first communications device at a reporting time in a first reporting period
  • the second CSI is the first communications
  • sending, by the device at the reporting time in the second reporting period, the first reporting period is greater than the second reporting period.
  • the CSI reporting is divided into two types of reporting modes: periodic CSI reporting and aperiodic CSI reporting.
  • two types of CSI are reported, and the first type of CSI may include an RI, a first PMI, a second PMI, a third PMI, and a CQI, and the second type of CSI includes only a CQI, and in a periodic CSI reporting mode,
  • the first type of CSI may correspond to a longer reporting period (ie, the first reporting period), and the second type of CSI may correspond to a shorter reporting period (ie, the second reporting period).
  • the current second type CSI may be reported before the periodic point and the current The second type of CSI reported by the CSI reporting period of the second type of CSI is used as a reference to calculate the second type of CSI that needs to be reported, but the embodiment of the present application does not limit this.
  • n 1 is protocol-stipulated or the second communication device is configured by the first communication device by signaling; and/or the value of the n 2 is The protocol or the second communication device is configured for the first communication device by signaling.
  • FIG. 3 is a schematic flowchart of a method 300 for reporting CSI according to an embodiment of the present application.
  • the method 300 can be applied to the communication system 100 shown in FIG. 1, but the embodiment of the present application is not limited thereto.
  • the second communication device sends a reference signal to the first communication device.
  • the first communication device receives the reference signal from the second communication device.
  • the first communications device performs channel measurement according to the reference signal.
  • the first communications device sends third channel state information CSI to the second communications device on a time unit identified as K, where the third CSI is used to indicate a channel state on the third reference time unit;
  • the identifier of the third reference time unit is K+n 3 , K is an integer, and n 3 is a positive integer.
  • the second communication device may transmit a reference signal to the first communication device, the first communication device receives the reference signal and performs channel measurement, and feeds back the obtained first CSI to the second communication device.
  • the first communications device feeds back a third CSI to the second communications device on the time unit identified as K, and the third CSI is used to represent the third reference time unit identified as K+n 3 Channel status.
  • the second communication device acquires the third CSI, and performs subsequent data transmission according to the third CSI.
  • the third CSI reporting may be periodic CSI reporting or aperiodic CSI reporting.
  • the first communication device feedback CSI is relatively sensitive to delay, especially for the first communication device with higher moving speed, since the CSI reflects the channel state at the measurement time, if the movement of the first communication device causes the channel The change, the CSI received by the second communication device does not fully reflect the channel state at the current time. In this case, if the second communication device directly applies the CSI fed back by the first communication device, the matching degree between the CSI and the channel at the current time is decreased, which affects the data transmission performance.
  • the first communication device may be identified on the K time unit to a second communication device a third feedback CSI, the CSI third identified as K + n indicates the third 3 Referring to the channel state of the time unit, so that the second communication device directly acquires the latest channel state, which is beneficial to improve the matching degree between the CSI applied by the second communication device and the current time channel, thereby improving data transmission performance.
  • the foregoing reference time unit may be represented by a reference resource, where the reference resource may generally include a time domain resource and a frequency domain resource, where the time domain resource is the reference time unit, but the application is implemented. This example does not limit this.
  • the foregoing first communication device may be a terminal device, and the second communication device may be a network device, but the embodiment of the present application does not limit this.
  • the reference signal is a channel state indication-reference signal (CSI-RS).
  • the signaling transmission between the first communication device and the second communication device may be a direct transmission or an indirect transmission, that is, the transmission is performed by the relay device. Therefore, the embodiment of the present application may also be applied to The application scenario of the relay device or the device-to-device (D2D) application scenario is not limited in this embodiment of the present application.
  • the method before the first communication device receives the reference signal from the second communication device, the method further includes:
  • the first communication device receives third indication information from the second communication device, where the third indication information is used to indicate transmission of at least two reference signals;
  • the receiving, by the first communications device, the reference signal from the second communications device includes:
  • the first communication device receives a third reference signal and a fourth reference signal from the second communication device according to the third indication information
  • the method further includes the first communication device determining the third CSI based on the third reference signal and the fourth reference signal.
  • one trigger signaling of the second communication device may trigger transmission of at least two reference signals.
  • the second communication device may send third indication information to the first communication device for indicating transmission of the at least two reference signals, and the second communication device sends the third reference signal and the fourth reference signal to the first communication device.
  • the first communication device obtains a third CSI for indicating a channel state of the third reference time unit of the K+n 3 according to the third reference signal and the fourth reference signal, and reports the third to the second communication device.
  • CSI CSI. It should be understood that the foregoing third indication information, the third reference signal, and the fourth reference signal may be sent separately, or may be sent at the same time, which is not limited by the embodiment of the present application.
  • the first communications device receives fourth indication information from the second communications device, where the fourth indication information is used to indicate a time domain location of the at least two reference signals, the at least two The time domain position of each of the reference signals is different.
  • the second communications device may send fourth indication information for the first communications device to indicate a time domain location (eg, a CSI-RS resource) of the at least two reference signals.
  • a time domain location eg, a CSI-RS resource
  • the third CSI reported by the first communications apparatus may include the RI, the PMI, and the CQI, but does not include the reference signal resource indication (CSI).
  • CSI reference signal resource indication
  • CRI reference signal resource indication
  • the method for reporting CSI according to the embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 3.
  • the apparatus for reporting CSI according to the embodiment of the present application will be described in detail below with reference to FIG. 4 to FIG.
  • FIG. 4 shows an apparatus 400 for reporting CSI provided by an embodiment of the present application.
  • the apparatus 400 includes:
  • the receiving unit 410 is configured to receive a reference signal from the second communications device.
  • the sending unit 420 is configured to perform channel measurement according to the reference signal, and send first channel state information CSI to the second communication device on a time unit identified as m, where the first CSI is used to indicate the first reference time. Channel state on the unit and the second reference time unit;
  • the identifier of the first reference time unit is mn 1
  • the identifier of the second reference time unit is mn 1 -n 2
  • m, n 1 and n 2 are integers, and n 2 is not equal to zero.
  • the device for reporting CSI in the embodiment of the present application may feed back the channel state of at least two time units to the second communication device in one CSI feedback, so that the second communication device estimates the CSI to be applied, which is beneficial to improve the second.
  • the degree of matching between the CSI applied by the communication device and the channel at the current time improves the data transmission performance.
  • the first CSI includes a first precoding matrix indicating PMI, a second PMI, and a third PMI, where the first PMI is used to indicate the first reference time unit and the second reference time a matrix corresponding to the matrix W 1 , the second PMI is used to indicate a matrix corresponding to the first reference time unit The third PMI is used to indicate a matrix corresponding to the second reference time unit The precoding matrix corresponding to the first reference time unit is satisfied The precoding matrix corresponding to the second reference time unit is satisfied
  • the third PMI for indicating the magnitude of the relative value ⁇ p x, y, z, amplitude of the relative value ⁇ p x, y, z for indicating the specific Amplitude coefficient of the yth column in the x ⁇ l+z row With the stated Amplitude coefficient of the corresponding position Relative value between; and/or
  • the matrix with Both are 2l rows and N columns of matrix, l and N are positive integers, x and z represent with Line number, y with The column number, x ⁇ 0,1 ⁇ , z ⁇ 1,2,...,l ⁇ ,y ⁇ 1,2,...,N ⁇ .
  • the device further includes: a first processing unit, configured to determine, according to the second PMI and the third PMI, a matrix corresponding to a time unit identified by q
  • the precoding matrix corresponding to the time unit identified as q satisfies matrix a matrix of 2' rows of N' columns, q is a positive integer greater than mn 1 and mn 1 -n 2 , and N' is a positive integer; Determining a second CQI on the time unit of the identifier q; the sending unit 420 is further configured to: send a second CSI to the second communication device, where the second CSI includes the second CQI.
  • Y represents the ratio of the difference between the identifier of the identifier q and the first reference time unit and the difference between the identifier of the first reference time unit and the identifier of the second reference time unit, y' ⁇ ⁇ 1, 2, ... N' ⁇ .
  • Y represents the ratio of the difference between the identifier of the identifier q and the first reference time unit and the difference between the identifier of the first reference time unit and the identifier of the second reference time unit, y' ⁇ ⁇ 1, 2, ... N' ⁇ .
  • the first CSI includes a fourth PMI and a fifth PMI, where the fourth PMI is used to indicate a precoding matrix W (1) corresponding to the first reference time unit, the fifth PMI And a precoding matrix W (2) for indicating the second reference time unit.
  • the relative value for the fifth PMI indicated coefficients [Delta] w r, t, [Delta] w relative values of the coefficients r, t represents the specific coefficient for the t-th column of W r-th row (2) Coefficient with the corresponding position in the W (1) The relative value between them; where matrix W (1) and W (2) are both N t rows and N columns, N t and N are positive integers, and r represents W (1) and W (2) rows The number t represents the column numbers of W (1) and W (2) , r ⁇ ⁇ 1, 2, ..., N t ⁇ , t ⁇ ⁇ 1, 2, ..., N ⁇ .
  • the device further includes: a second processing unit, configured to determine, according to the fourth PMI and the fifth PMI, a matrix corresponding to a time unit identified as q matrix N t rows of N 'columns of the matrix, q is a positive integer and mn 1 mn 1 -n 2; and according to the Determining a second CQI on the time unit of the identifier q; the sending unit 420 is further configured to: send a second CSI to the second communication device, where the second CSI includes the second CQI.
  • a second processing unit configured to determine, according to the fourth PMI and the fifth PMI, a matrix corresponding to a time unit identified as q matrix N t rows of N 'columns of the matrix, q is a positive integer and mn 1 mn 1 -n 2; and according to the Determining a second CQI on the time unit of the identifier q; the sending unit 420 is further configured to: send a second CSI
  • the receiving unit 410 is further configured to: receive configuration information from the second communications device, where the configuration information is used to indicate that the second CSI is dependent on the first CSI;
  • the first communication device determines, according to the configuration information, the second PMI, and the third PMI,
  • the receiving unit 410 is specifically configured to: receive, by the second communications device, first indication information, where the first indication information is used to indicate transmission of at least two reference signals; according to the first indication information Receiving, from the second communication device, a first reference signal for measuring a channel state of the first reference time unit, and a second reference signal for measuring the The channel state of the second reference time unit.
  • the sending unit 420 is further configured to: send, to the second communications device, second indication information, where the second indication information is used to indicate whether the first CSI is available.
  • the first CSI is sent by the first communications device at a reporting time in a first reporting period
  • the second CSI is that the first communications device is in a second And sending, by the reporting time in the reporting period, the first reporting period is greater than the second reporting period.
  • the value of the n 1 is agreed by the protocol or the second communication device is configured by the first communication device by using signaling; and/or the value of the n 2 is a protocol agreed or The second communication device is configured for the first communication device by signaling.
  • the apparatus 400 herein is embodied in the form of a functional unit.
  • the term "unit” as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (eg, a shared processor, a proprietary processor, or a group) for executing one or more software or firmware programs. Processors, etc.) and memory, merge logic, and/or other suitable components that support the described functionality.
  • ASIC application specific integrated circuit
  • the device 400 may be specifically the first communication device in the foregoing embodiment 200, and the device 400 may be used to execute each of the foregoing method embodiments 200 corresponding to the first communication device. Processes and/or steps, to avoid repetition, will not be repeated here.
  • FIG. 5 shows another apparatus 500 for reporting CSI provided by an embodiment of the present application.
  • the apparatus 500 includes:
  • the sending unit 510 is configured to send a reference signal to the first communications device.
  • the receiving unit 520 is configured to receive, by the first communications device, first channel state information CSI that is sent on a time unit that is identified as m according to the reference signal, where the first CSI is used to represent the first reference time unit and Channel state on the second reference time unit;
  • the identifier of the first reference time unit is mn 1
  • the identifier of the second reference time unit is mn 1 -n 2
  • m, n 1 and n 2 are integers, and n 2 is not equal to zero.
  • the apparatus for reporting CSI in the embodiment of the present application may obtain the channel state of at least two time units in one CSI feedback, so that the device estimates the CSI to be applied, which is beneficial to improving the CSI and the current time applied by the device.
  • the matching degree of the channel thereby improving the data transmission performance.
  • the first CSI includes a first precoding matrix indicating PMI, a second PMI, and a third PMI, where the first PMI is used to indicate the first reference time unit and the second reference time a matrix corresponding to the matrix W 1 , the second PMI is used to indicate a matrix corresponding to the first reference time unit The third PMI is used to indicate a matrix corresponding to the second reference time unit The precoding matrix corresponding to the first reference time unit is satisfied The precoding matrix corresponding to the second reference time unit is satisfied
  • the third PMI for indicating the magnitude of the relative value ⁇ p x, y, z, amplitude of the relative value ⁇ p x, y, z for indicating the specific Amplitude coefficient of the yth column in the x ⁇ l+z row With the stated Amplitude coefficient of the corresponding position Relative value between; and/or
  • the matrix with Both are 2l rows and N columns of matrix, l and N are positive integers, x and z represent with Line number, y with The column number, x ⁇ 0,1 ⁇ , z ⁇ 1,2,...,l ⁇ ,y ⁇ 1,2,...,N ⁇ .
  • the receiving unit 520 is further configured to: receive a second CSI from the first communications device, where the second CSI includes a second CQI, where the second CQI is corresponding according to a time unit identified as q matrix Determining that the precoding matrix corresponding to the time unit of the identifier q is satisfied matrix A matrix of 2' rows of N' columns, q is a positive integer greater than mn 1 and mn 1 - n 2 , and N' is a positive integer.
  • Y represents the ratio of the difference between the identifier of the identifier q and the first reference time unit and the difference between the identifier of the first reference time unit and the identifier of the second reference time unit, y' ⁇ ⁇ 1, 2, ... N' ⁇ .
  • Y represents the ratio of the difference between the identifier of the identifier q and the first reference time unit and the difference between the identifier of the first reference time unit and the identifier of the second reference time unit, y' ⁇ ⁇ 1, 2, ... N' ⁇ .
  • the first CSI includes a fourth PMI and a fifth PMI, where the fourth PMI is used to indicate a precoding matrix W (1) corresponding to the first reference time unit, the fifth PMI And a precoding matrix W (2) for indicating the second reference time unit.
  • the relative value for the fifth PMI indicated coefficients [Delta] w r, t, [Delta] w relative values of the coefficients r, t represents the specific coefficient for the t-th column of W r-th row (2) Coefficient with the corresponding position in the W (1) The relative value between them; where matrix W (1) and W (2) are both N t rows and N columns, N t and N are positive integers, and r represents W (1) and W (2) rows The number t represents the column numbers of W (1) and W (2) , r ⁇ ⁇ 1, 2, ..., N t ⁇ , t ⁇ ⁇ 1, 2, ..., N ⁇ .
  • the sending unit 510 is further configured to: send configuration information to the first communications device, where the configuration information is used to indicate that the second CSI is dependent on the first CSI.
  • the sending unit 510 is specifically configured to: send, to the first communications device, first indication information, where the first indication information is used to indicate transmission of at least two reference signals; to the first communications device Transmitting a first reference signal for measuring a channel state of the first reference time unit, and a second reference signal for measuring a channel state of the second reference time unit .
  • the receiving unit 520 is further configured to: receive, by the first communications device, second indication information, where the second indication information is used to indicate whether the first CSI is available.
  • the first CSI is sent by the first communications device at a reporting time in a first reporting period
  • the second CSI is that the first communications device is in a second And sending, by the reporting time in the reporting period, the first reporting period is greater than the second reporting period.
  • the value of the n 1 is agreed by the protocol or the second communication device is configured by the first communication device by using signaling; and/or the value of the n 2 is a protocol agreed or The second communication device is configured for the first communication device by signaling.
  • the apparatus 500 herein is embodied in the form of a functional unit.
  • the term "unit” as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (eg, a shared processor, a proprietary processor, or a group) for executing one or more software or firmware programs. Processors, etc.) and memory, merge logic, and/or other suitable components that support the described functionality.
  • ASIC application specific integrated circuit
  • the device 500 may be specifically the second communication device in the foregoing embodiment 200, and the device 500 may be used to execute each of the foregoing method embodiments 200 corresponding to the second communication device. Processes and/or steps, to avoid repetition, will not be repeated here.
  • FIG. 6 shows another apparatus 600 for reporting CSI provided by an embodiment of the present application.
  • the apparatus 600 includes:
  • the receiving unit 610 is configured to receive a reference signal from the second communications device.
  • the sending unit 620 is configured to perform channel measurement according to the reference signal, and send third channel state information CSI to the second communication device on a time unit identified as K, where the third CSI is used to indicate the third reference time.
  • the identifier of the third reference time unit is K+n 3 , and both K and n 3 are positive integers.
  • the apparatus for reporting CSI in the embodiment of the present application may feed back a third CSI to a second communication apparatus on a time unit identified as K, where the third CSI indicates a channel state of a third reference time unit identified as K+n 3 , Therefore, the second communication device directly acquires the latest channel state, which is beneficial to improve the matching degree between the CSI applied by the second communication device and the current time channel, thereby improving data transmission performance.
  • the receiving unit 610 is specifically configured to: receive third indication information, where the third indication information is used to indicate transmission of at least two reference signals, according to the third indication information, Receiving a first reference signal and a second reference signal from the second communication device; the device further comprising: a processing unit, configured to determine the third according to the first reference signal and the second reference signal CSI.
  • the receiving unit 610 is further configured to: receive fourth indication information, where the fourth indication information is used to indicate a time domain location of the at least two reference signals, each of the at least two reference signals The time domain position of the reference signal is different.
  • the apparatus 600 herein is embodied in the form of a functional unit.
  • the term "unit” as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (eg, a shared processor, a proprietary processor, or a group) for executing one or more software or firmware programs. Processors, etc.) and memory, merge logic, and/or other suitable components that support the described functionality.
  • ASIC application specific integrated circuit
  • the device 600 may be specifically the first communication device in the foregoing embodiment 300, and the device 600 may be configured to execute each of the foregoing method embodiments 300 corresponding to the first communication device. Processes and/or steps, to avoid repetition, will not be repeated here.
  • FIG. 7 shows another apparatus 700 for reporting CSI provided by an embodiment of the present application.
  • the apparatus 700 includes a processor 710, a transceiver 720, and a memory 730.
  • the processor 710, the transceiver 720, and the memory 730 communicate with each other through an internal connection path.
  • the memory 730 is configured to store instructions, and the processor 710 is configured to execute instructions stored in the memory 730 to control the transceiver 720 to send signals and / or receive signals.
  • the processor 710 is configured to receive a reference signal from the second communication device by using the transceiver 720; perform channel measurement according to the reference signal, and send the first channel to the second communication device on a time unit identified as m State information CSI, the first CSI is used to indicate channel states on the first reference time unit and the second reference time unit; wherein the identifier of the first reference time unit is mn 1 , the second reference time unit The identifier is mn 1 -n 2 , m, n 1 and n 2 are integers, and n 2 is not equal to zero.
  • the apparatus 700 may be specifically the first communication apparatus in the foregoing embodiment 200, and may be used to perform various steps and/or processes corresponding to the first communication apparatus in the foregoing method embodiment 200.
  • the memory 730 can include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor 710 can be configured to execute instructions stored in a memory, and when the processor 710 executes an instruction stored in the memory, the processor 710 is configured to perform the various steps of the method embodiment corresponding to the first communication device And / or process.
  • FIG. 8 shows another apparatus 800 for reporting CSI provided by an embodiment of the present application.
  • the apparatus 800 includes a processor 810, a transceiver 820, and a memory 830.
  • the processor 810, the transceiver 820, and the memory 830 communicate with each other through an internal connection path.
  • the memory 830 is configured to store instructions, and the processor 810 is configured to execute instructions stored in the memory 830 to control the transceiver 820 to send signals and / or receive signals.
  • the processor 810 is configured to send, by the transceiver 820, a reference signal to the first communications apparatus, and receive, by the first communications apparatus, first channel state information that is sent on a time unit identified as m according to the reference signal.
  • CSI the first CSI is used to indicate channel states on the first reference time unit and the second reference time unit; wherein the identifier of the first reference time unit is mn 1 , and the identifier of the second reference time unit Is mn 1 -n 2 , and m, n 1 and n 2 are integers.
  • the device 800 may be specifically the second communication device in the foregoing embodiment 200, and may be used to perform various steps and/or processes corresponding to the second communication device in the foregoing method embodiment 200.
  • the memory 830 can include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor 810 can be configured to execute instructions stored in a memory, and when the processor 810 executes instructions stored in the memory, the processor 610 is configured to perform the various steps of the method embodiment corresponding to the second communication device And / or process.
  • FIG. 9 shows another apparatus 900 for reporting CSI provided by an embodiment of the present application.
  • the apparatus 900 includes a processor 910, a transceiver 920, and a memory 930.
  • the processor 910, the transceiver 920, and the memory 930 communicate with each other through an internal connection path.
  • the memory 930 is configured to store instructions, and the processor 910 is configured to execute instructions stored in the memory 930 to control the transceiver 920 to send signals and / or receive signals.
  • the processor 910 is configured to receive a reference signal from the second communication device by using the transceiver 920; perform channel measurement according to the reference signal, and send a third channel to the second communication device on a time unit identified as K State information CSI, the third CSI is used to indicate a channel state on a third reference time unit; wherein the identifier of the third reference time unit is K+n 3 , K is an integer, n 3 is a positive integer, and n 2 is not equal to zero.
  • the apparatus 900 may be specifically the first communication apparatus in the above-described embodiment 300, and may be used to perform various steps and/or processes corresponding to the first communication apparatus in the above method embodiment 300.
  • the memory 930 can include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include a non-volatile random access memory.
  • the memory can also store information of the device type.
  • the processor 910 can be configured to execute instructions stored in a memory, and when the processor 910 executes instructions stored in the memory, the processor 910 is configured to perform the various steps of the method embodiment corresponding to the first communication device And / or process.
  • the processor of the foregoing apparatus may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits. (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • each step of the above method may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software units in the processor.
  • the software unit can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in a memory, and the processor executes instructions in the memory, in combination with hardware to perform the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • 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, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units 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 units may be selected according to actual needs to achieve the objectives of the embodiments of the present application.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present application may be in essence or part of the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .

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Abstract

本申请提供了一种上报信道状态信息CSI的方法和装置，该方法包括：第一通信装置从第二通信装置接收参考信号；所述第一通信装置根据所述参考信号进行信道测量，在标识为m的时间单元上向所述第二通信装置发送第一CSI，所述第一CSI用于表示第一参考时间单元和第二参考时间单元上的信道状态；其中，所述第一参考时间单元的标识为m-n 1，所述第二参考时间单元的标识为m-n 1-n 2，m、n 1和n 2为整数，且n 2不等于零。本申请实施例的上报CSI的方法和装置，有利于提高网络设备所应用的CSI与当前时刻的信道的匹配度，进而提高数据传输性能。

Description

上报信道状态信息CSI的方法和装置 技术领域
本申请涉及通信领域，特别涉及通信领域中的上报信道状态信息CSI的方法和装置。
背景技术
通信***广泛采用了多输入多输出(multiple-input multiple-output，MIMO)技术，MIMO技术是指在网络设备和终端设备分别使用多根发射天线和接收天线，通过采用多层并行传输的传输模式提供较高的数据传输速率，改善通信质量。信道状态信息(channel state information，CSI)用于表示通信链路的信道属性，网络设备获取的CSI的准确性在很大程度上决定了MIMO***的性能。一般情况下，在频分双工(frequency division duplexing，FDD)***或信道互易性不能很好满足的时分双工(time division duplexing，TDD)***中，终端设备需要测量CSI，并将其上报给网络设备。
终端设备反馈CSI对于时延比较敏感，特别是对于移动速度较高的终端设备而言，由于CSI反映的是测量时刻的信道状态，若终端设备的移动造成信道的变化，网络设备接收到的CSI并不能完全反映出当前时刻的信道状态了。在这种情况下，若该网络设备直接应用该终端设备反馈的CSI，会导致该CSI与当前时刻的信道的匹配度下降，影响数据传输性能。
发明内容
本申请提供一种上报CSI的方法和装置，有利于提高网络设备所应用的CSI与当前时刻的信道的匹配度，进而提高数据传输性能。
第一方面，提供了一种上报CSI的方法，包括：第一通信装置从第二通信装置接收参考信号；所述第一通信装置根据所述参考信号进行信道测量，在标识为m的时间单元上向所述第二通信装置发送第一CSI，所述第一CSI用于表示第一参考时间单元和第二参考时间单元上的信道状态；其中，所述第一参考时间单元的标识为m-n 1，所述第二参考时间单元的标识为m-n 1-n 2，m、n 1和n 2为整数，且n 2不等于零。
本申请实施例的上报CSI的方法，第一通信装置可以在一次CSI反馈中向第二通信装置反馈至少两个时间单元的信道状态，以便第二通信装置对所要应用的CSI进行预估，有利于提高第二通信装置所应用的CSI与当前时刻的信道的匹配度，进而提高数据传输性能。
在本申请实施例中，m-n 1不等于m-n 1-n 2，即所述第一参考时间单元和所述第二参考时间单元不相同。应理解，时间单元可以为子帧(frame)，也可以为时隙(slot)，还可以为符号(symbol)，本申请实施例对此不作限定。因此，时间单元的标识具体可以为子帧、时隙或符号的标识，以符号的标识为例，在一个资源单元(包括一个或多个资源块(resource block，RB))中，符号的标识可以为0～6(或1～7)，也可以为0～13(或1～14)。
一般情况下，时间单元的标识都是循环往复的，例如，在每个资源单元中，符号的标识均为0～13，对于多个资源单元，符号的标识依次为0～13、0～13、…、0～13等等。若某个时间单元的标识为负值，那么该时间单元为从当前时刻对应的资源单元中向前递推相应的值所对应的时间单元。例如，根据上面的定义，可能存在某个时间单元的标识为-2，若当前时刻对应的资源单元为0～13、0～13、…、0～13中的第二个资源单元，那么向前递推，标识为-2的时间单元表示的就是第一个资源单元中标识为12的时间单元。在本申请实施例中，m为整数，表示当前CSI上报时刻的时间单元的标识，m-n 1和m-n 1-n 2可以是正整数，也可以是负整数，本申请实施例对此不作限定。
此外，在一种可能的实现方式中，上述参考时间单元可以通过参考资源来表示，参考资源一般可以包括时域资源和频域资源，时域资源即为上述参考时间单元，但本申请实施例对此不作限定。
还应理解，上述第一通信装置可以为终端设备，第二通信装置可以为网络设备，但本申请实施例对此不作限定。在一种具体的实现方式中，上述参考信号为信道状态信息参考信号(channel state indication-reference signal，CSI-RS)。
第一通信装置在反馈上述第一CSI时，可以采用单码本的结构，也可以采用双码本的结构，即两级码本，本申请实施例对此不作限定。应理解，本文采用上标(1)表示第一参考时间单元对应的参数，上标(2)表示第二参考时间单元对应的参数，其他上标类似，此处不再一一列举。
结合第一方面，在第一方面的某些实现方式中，所述第一CSI包括第一预编码矩阵指示PMI、第二PMI和第三PMI；其中，所述第一PMI用于指示所述第一参考时间单元和所述第二参考时间单元对应的矩阵W 1，所述第二PMI用于指示所述第一参考时间单元对应的矩阵
Figure PCTCN2018074837-appb-000001
所述第三PMI用于指示所述第二参考时间单元对应的矩阵
Figure PCTCN2018074837-appb-000002
所述第一参考时间单元对应的预编码矩阵满足
Figure PCTCN2018074837-appb-000003
所述第二参考时间单元对应的预编码矩阵满足
Figure PCTCN2018074837-appb-000004
具体地，预编码矩阵指示(pre-coding matrix indicator，PMI)用于从预定义的码本中指示第一通信装置推荐的进行数据传输时采用的预编码矩阵。上述第一CSI可以包括第一PMI、第二PMI和第三PMI。第一PMI用于指示矩阵W 1，该W 1在第一参考时间单元和第二参考时间单元上都是适用的。第二PMI用于指示第一参考时间单元对应的矩阵
Figure PCTCN2018074837-appb-000005
第三PMI用于指示第二参考时间单元对应的矩阵
Figure PCTCN2018074837-appb-000006
在接收到双码本结构的第一CSI的情况下，第二通信装置可以根据W 1和
Figure PCTCN2018074837-appb-000007
计算出第一参考时间单元的预编码矩阵W (1)，根据W 1和
Figure PCTCN2018074837-appb-000008
计算出第二参考时间单元的预编码矩阵W (2)。由于W 1在整个通信带宽上是相同的，第一通信装置可以通过上述双码本结构进行CSI反馈可以降低反馈开销。
上述第三PMI可以直接用于指示第二参考时间单元对应的矩阵
Figure PCTCN2018074837-appb-000009
也可以用于指示矩阵
Figure PCTCN2018074837-appb-000010
和矩阵
Figure PCTCN2018074837-appb-000011
中幅度的相对值和/或相位的相对值，本申请实施例对此不作限定。但应理解，采用幅度的相对值和/或相位的相对值能够进一步节省第一通信装置的CSI反馈开销。
具体地，矩阵W 1为对角块阵，即
Figure PCTCN2018074837-appb-000012
其中矩阵A包含l个列向量，l≥1，A＝[b 0 b 1 ... b l-1]，其中b s为长度为N t/2的列向量，N t为正整数，s∈{0,1,...,l-1}。 矩阵
Figure PCTCN2018074837-appb-000013
和矩阵
Figure PCTCN2018074837-appb-000014
为2l行N列的矩阵，l和N均为正整数。根据表示形态，
Figure PCTCN2018074837-appb-000015
和
Figure PCTCN2018074837-appb-000016
可以分为第一类型码本和第二类型码本。
对于第一类型码本，
Figure PCTCN2018074837-appb-000017
的第n列表示形式为
Figure PCTCN2018074837-appb-000018
Figure PCTCN2018074837-appb-000019
的第n列表示形式为
Figure PCTCN2018074837-appb-000020
其中，n∈{1,2,...,N-1}，e k为l×1的列向量，其第k个元素为1，其余的元素为0，
Figure PCTCN2018074837-appb-000021
和
Figure PCTCN2018074837-appb-000022
均为模为1的复数，可以表示为
Figure PCTCN2018074837-appb-000023
其中
Figure PCTCN2018074837-appb-000024
表示复数
Figure PCTCN2018074837-appb-000025
的相位，
Figure PCTCN2018074837-appb-000026
表示复数
Figure PCTCN2018074837-appb-000027
的相位。
对于第二类型码本，
Figure PCTCN2018074837-appb-000028
的表示形式为
Figure PCTCN2018074837-appb-000029
其中，h x,y,z和
Figure PCTCN2018074837-appb-000030
为实数，
Figure PCTCN2018074837-appb-000031
为模为1的复数，且
Figure PCTCN2018074837-appb-000032
其中
Figure PCTCN2018074837-appb-000033
表示为复数
Figure PCTCN2018074837-appb-000034
的相位，x和z表示
Figure PCTCN2018074837-appb-000035
和
Figure PCTCN2018074837-appb-000036
的行号，y表示
Figure PCTCN2018074837-appb-000037
和
Figure PCTCN2018074837-appb-000038
的列号，x∈{0,1}，y∈{1,2,...,N}，z∈{1,2,...,l}。
Figure PCTCN2018074837-appb-000039
的表示形式为
Figure PCTCN2018074837-appb-000040
其中，h x,y,z和
Figure PCTCN2018074837-appb-000041
为实数，
Figure PCTCN2018074837-appb-000042
为模为1的复数，且
Figure PCTCN2018074837-appb-000043
其中
Figure PCTCN2018074837-appb-000044
表示为复数
Figure PCTCN2018074837-appb-000045
的相位，x和z表示
Figure PCTCN2018074837-appb-000046
和
Figure PCTCN2018074837-appb-000047
的行号，y表示
Figure PCTCN2018074837-appb-000048
和
Figure PCTCN2018074837-appb-000049
的列号，x∈{0,1}，y∈{1,2,...,N}，z∈{1,2,...,l}。
结合第一方面，在第一方面的某些实现方式中，对于第一类型码本，所述第三PMI用于指示相位的相对值Δc n，所述相位的相对值Δc n具体用于表示所述
Figure PCTCN2018074837-appb-000050
中第n列中
Figure PCTCN2018074837-appb-000051
与所述
Figure PCTCN2018074837-appb-000052
中对应位置的系数
Figure PCTCN2018074837-appb-000053
之间的相对值。
结合第一方面，在第一方面的某些实现方式中，
Figure PCTCN2018074837-appb-000054
或
Figure PCTCN2018074837-appb-000055
结合第一方面，在第一方面的某些实现方式中，对于第二类型码本，所述第三PMI用 于指示幅度的相对值Δp x,y,z，所述幅度的相对值Δp x,y,z具体用于表示所述
Figure PCTCN2018074837-appb-000056
中第x×l+z行第y列的幅度系数
Figure PCTCN2018074837-appb-000057
与所述
Figure PCTCN2018074837-appb-000058
中对应位置的幅度系数
Figure PCTCN2018074837-appb-000059
之间的相对值；和/或
所述第三PMI用于指示相位的相对值Δc x,y,z，所述相位的相对值Δc x,y,z具体用于表示所述
Figure PCTCN2018074837-appb-000060
中第x×l+z行第y列的相位系数
Figure PCTCN2018074837-appb-000061
与所述
Figure PCTCN2018074837-appb-000062
中对应位置的相位系数
Figure PCTCN2018074837-appb-000063
之间的相对值；
其中，矩阵
Figure PCTCN2018074837-appb-000064
和
Figure PCTCN2018074837-appb-000065
均为2l行N列的矩阵，l和N均为正整数，x和z表示
Figure PCTCN2018074837-appb-000066
和
Figure PCTCN2018074837-appb-000067
的行号，y表示
Figure PCTCN2018074837-appb-000068
和
Figure PCTCN2018074837-appb-000069
的列号，x∈{0,1}，z∈{1,2,...,l}，y∈{1,2,...,N}。
应理解，相对值可以表示减法运算，也可以表示除法运算，即幅度的相对值Δp x,y,z可以为
Figure PCTCN2018074837-appb-000070
与
Figure PCTCN2018074837-appb-000071
之间的差值，也可以为
Figure PCTCN2018074837-appb-000072
与
Figure PCTCN2018074837-appb-000073
之间的比值，相位的相对值Δc x,y,z类似，本申请实施例对此不作限定。但应理解，具体的计算方式需要协议约定，或者由第二通信装置通过信令配置给第一通信装置。
结合第一方面，在第一方面的某些实现方式中，
Figure PCTCN2018074837-appb-000074
或
Figure PCTCN2018074837-appb-000075
结合第一方面，在第一方面的某些实现方式中，若
Figure PCTCN2018074837-appb-000076
则
Figure PCTCN2018074837-appb-000077
或
Figure PCTCN2018074837-appb-000078
其中，j 2＝-1。
应理解，在本申请实施例中，第一通信装置除了向第二通信装置反馈上述第一CSI，还可以向第二通信装置反馈第二CSI，该第二CSI用于表示标识为q的时间单元上的信道状态。在具体实现时，该第二CSI可以是第一通信装置根据参考信号进行信道测量预测得到的，也可以是该第一通信装置根据第一CSI，进行预测得到的，本申请实施例对此不作限定。
结合第一方面，在第一方面的某些实现方式中，所述方法还包括：所述第一通信装置根据所述第二PMI和所述第三PMI，确定标识为q的时间单元对应的矩阵
Figure PCTCN2018074837-appb-000079
所述标识为q的时间单元对应的预编码矩阵满足
Figure PCTCN2018074837-appb-000080
矩阵
Figure PCTCN2018074837-appb-000081
为2l行N′列的矩阵，q为大于m-n 1和m-n 1-n 2的正整数，N′为正整数；所述第一通信装置根据所述
Figure PCTCN2018074837-appb-000082
确定所述标识为q的时间单元上的第二CQI；所述第一通信装置向所述第二通信装置发送第二CSI，所述第二CSI包括所述第二CQI。
具体地，第一通信装置可以根据第一CSI中包括的第二PMI和第三PMI，确定标识为q的时间单元对应的矩阵
Figure PCTCN2018074837-appb-000083
再根据
Figure PCTCN2018074837-appb-000084
确定标识为q的时间单元上的第二CQI，然后向第二通信装置发送该第二CQI。矩阵
Figure PCTCN2018074837-appb-000085
为2l行N′列的矩阵。
结合第一方面，在第一方面的某些实现方式中，所述
Figure PCTCN2018074837-appb-000086
是根据所述第二PMI、所述第三PMI以及下列公式，计算出的所述
Figure PCTCN2018074837-appb-000087
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000088
和/或所述
Figure PCTCN2018074837-appb-000089
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000090
确定的，
Figure PCTCN2018074837-appb-000091
Figure PCTCN2018074837-appb-000092
其中，Y表示标识q和第一参考时间单元的标识之差与第一参考时间单元的标识和第二参考时间单元的标识之差的比值，y′∈{1,2,...N′}，N′≤N。
结合第一方面，在第一方面的某些实现方式中，
Figure PCTCN2018074837-appb-000093
或
Figure PCTCN2018074837-appb-000094
结合第一方面，在第一方面的某些实现方式中，
Figure PCTCN2018074837-appb-000095
或
Figure PCTCN2018074837-appb-000096
结合第一方面，在第一方面的某些实现方式中，所述
Figure PCTCN2018074837-appb-000097
是根据所述第二PMI、所述第三PMI以及下列公式，计算出的所述
Figure PCTCN2018074837-appb-000098
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000099
和/或所述
Figure PCTCN2018074837-appb-000100
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000101
确定的，
Figure PCTCN2018074837-appb-000102
Figure PCTCN2018074837-appb-000103
其中，Y表示标识q和第一参考时间单元的标识之差与第一参考时间单元的标识和第二参考时间单元的标识之差的比值，y′∈{1,2,...N′}，N′≤N。
结合第一方面，在第一方面的某些实现方式中，所述
Figure PCTCN2018074837-appb-000104
是根据所述第二PMI、所述第三PMI以及下列公式，计算出的所述
Figure PCTCN2018074837-appb-000105
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000106
和/或所述
Figure PCTCN2018074837-appb-000107
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000108
确定的，
Figure PCTCN2018074837-appb-000109
Figure PCTCN2018074837-appb-000110
其中，Y表示标识q和第一参考时间单元的标识之差与第一参考时间单元的标识和第二参考时间单元的标识之差的比值，y′∈{1,2,...N′}，N′≤N。
结合第一方面，在第一方面的某些实现方式中，所述
Figure PCTCN2018074837-appb-000111
是根据所述第二PMI、所述第三PMI以及下列公式，计算出的所述
Figure PCTCN2018074837-appb-000112
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000113
和/或所述
Figure PCTCN2018074837-appb-000114
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000115
确定的，
Figure PCTCN2018074837-appb-000116
Figure PCTCN2018074837-appb-000117
其中，Y表示标识q和第一参考时间单元的标识之差与第一参考时间单元的标识和第二参考时间单元的标识之差的比值，y′∈{1,2,...N′}，N′≤N。
结合第一方面，在第一方面的某些实现方式中，所述第一CSI包括第四PMI和第五PMI，其中，所述第四PMI用于指示所述第一参考时间单元对应的预编码矩阵W (1)，所述第五PMI用于指示所述第二参考时间单元对应的预编码矩阵W (2)。
具体地，在单码本结构下，上述第一CSI可以直接包括用于指示W (1)的第四PMI和用于指示W (2)的第五PMI。第一通信装置采用单码本结构向第二通信装置上报第一CSI，第二通信装置在收到该第一CSI之后，可以直接根据该第一CSI确定第一参考时间单元对应的预编码矩阵W (1)和第二参考时间单元对应的预编码矩阵W (2)，降低了第二通信装置的计算复杂度。
结合第一方面，在第一方面的某些实现方式中，所述第五PMI用于指示系数的相对值Δw r,t，所述系数的相对值Δw r,t具体用于表示所述W (2)中第r行第t列的系数
Figure PCTCN2018074837-appb-000118
与所述W (1)中对应位置的系数
Figure PCTCN2018074837-appb-000119
之间的相对值；其中，矩阵W (1)和W (2)均为N t行N列的矩阵，N t和N均为正整数，r表示W (1)和W (2)的行号，t表示W (1)和W (2)的列号，r∈{1,2,...,N t}，t∈{1,2,...,N}。
应理解，相对值可以表示减法运算，也可以表示除法运算，即系数的相对值Δw r,t可以 为
Figure PCTCN2018074837-appb-000120
与
Figure PCTCN2018074837-appb-000121
之间的差值，也可以为
Figure PCTCN2018074837-appb-000122
与
Figure PCTCN2018074837-appb-000123
之间的比值。但应理解，具体的计算方式需要协议约定，或者由第二通信装置通过信令配置给第一通信装置。
结合第一方面，在第一方面的某些实现方式中，所述方法还包括：第一通信装置根据所述第四PMI和所述第五PMI，确定标识为q的时间单元对应的矩阵
Figure PCTCN2018074837-appb-000124
矩阵
Figure PCTCN2018074837-appb-000125
为N t行N′列的矩阵，q为大于m-n 1和m-n 1-n 2的正整数；所述第一通信装置根据所述
Figure PCTCN2018074837-appb-000126
确定所述标识为q的时间单元上的第二CQI；所述第一通信装置向所述第二通信装置发送第二CSI，所述第二CSI包括所述第二CQI。
结合第一方面，在第一方面的某些实现方式中，所述方法还包括：所述第一通信装置从所述第二通信装置接收配置信息，所述配置信息用于指示所述第二CSI依赖于所述第一CSI；所述第一通信装置根据所述第二PMI和所述第三PMI，确定标识为q的时间单元对应的矩阵
Figure PCTCN2018074837-appb-000127
包括：所述第一通信装置根据所述配置信息、所述第二PMI和所述第三PMI，确定所述
Figure PCTCN2018074837-appb-000128
具体地，第二通信装置可以向第一通信装置发送配置信息，用于指示第二CSI依赖于第一CSI，这样，第一通信装置就可以按照第一CSI中包括的第二PMI和第三PMI，计算
Figure PCTCN2018074837-appb-000129
从而计算出第二CQI。在一种可能的实现方式中，上述配置信息可以为CSI上报索引。
结合第一方面，在第一方面的某些实现方式中，在第一通信装置从第二通信装置接收参考信号之前，所述方法还包括：所述第一通信装置从所述第二通信装置接收第一指示信息，所述第一指示信息用于指示至少两个参考信号的传输；所述第一通信装置从第二通信装置接收参考信号，包括：所述第一通信装置根据所述第一指示信息，从所述第二通信装置接收第一参考信号和第二参考信号，所述第一参考信号用于测量所述第一参考时间单元的信道状态，所述第二参考信号用于测量所述第二参考时间单元的信道状态。
在本申请实施例中，第二通信装置的一个触发信令可以触发至少两个参考信号的传输。具体地，第二通信装置可以向第一通信装置发送第一指示信息，用于指示至少两个参考信号的传输，该第二通信装置向第一通信装置发送第一参考信号和第二参考信号，该第一通信装置采用第一参考信号测量第一参考时间单元上的信道状态，采用第二参考信号测量第二参考时间单元上的信道状态，结合第一参考时间单元上的信道状态和第二参考时间单元上的信道状态，向第二通信装置上报第一CSI，所述CSI不包括CSI-RS资源指示(CRI)。
结合第一方面，在第一方面的某些实现方式中，所述方法还包括：所述第一通信装置向所述第二通信装置发送第二指示信息，所述第二指示信息用于指示所述第一CSI是否可用。
具体地，第一通信装置还可以向第二通信装置发送第二指示信息，用于指示第一CSI是否可用，该第二通信装置在收到该第二指示信息指示第一CSI不可用时，就可以确定第一通信装置不再根据第一CSI计算第二CSI，或者第二通信装置不再根据第一CSI进行信道预测。进一步地，第一通信装置可以在该第二指示信息中具体指示该第一CSI在某个时刻之后就不可用，本申请实施例对此不作限定。
结合第一方面，在第一方面的某些实现方式中，对于周期性CSI上报模式，所述第一CSI是所述第一通信装置在第一上报周期内的上报时刻发送的，所述第二CSI是所述第一通信装置在第二上报周期内的上报时刻发送的，所述第一上报周期大于所述第二上报周期。
具体地，CSI上报分为周期性CSI上报(periodic CSI reporting)和非周期性CSI上报(aperiodic CSI reporting)两种上报模式。在本申请实施例中，上报两类CSI，第一类CSI包括RI、第一PMI、第二PMI、第三PMI以及CQI，第二类CSI包括CQI或者包括CQI和RI，不包括第一PMI、第二PMI和第三PMI，在周期性CSI上报模式下，第一类CSI可以对应一个较长的上报周期(即第一上报周期)，第二类CSI可以对应一个较短的上报周期(即第二上报周期)。
应理解，由于第二类CSI中的CQI是根据第一类CSI中的第二PMI和第三PMI计算的，可以通过协议约定，将在当前的第二类CSI上报周期点之前，与该当前的第二类CSI最接近的第一类CSI上报周期点所上报的信息，作为参考，计算出当前需要上报的第二类CSI，但本申请实施例对此不作限定。
结合第一方面，在第一方面的某些实现方式中，所述n 1的取值为协议约定的或所述第二通信装置通过信令为所述第一通信装置配置的；和/或所述n 2的取值为协议约定的或所述第二通信装置通过信令为所述第一通信装置配置的。
第二方面，提供了另一种上报CSI的方法，包括：第二通信装置向第一通信装置发送参考信号；所述第二通信装置接收所述第一通信装置根据所述参考信号，在标识为m的时间单元上发送的第一CSI，所述第一CSI用于表示第一参考时间单元和第二参考时间单元上的信道状态；其中，所述第一参考时间单元的标识为m-n 1，所述第二参考时间单元的标识为m-n 1-n 2，m、n 1和n 2为整数，且n 2不等于零。
本申请实施例的上报CSI的方法，第一通信装置可以在一次CSI反馈中向第二通信装置反馈至少两个时间单元的信道状态，以便第二通信装置对所要应用的CSI进行预估，有利于提高第二通信装置所应用的CSI与当前时刻的信道的匹配度，进而提高数据传输性能。
结合第二方面，在第二方面的某些实现方式中，所述第一CSI包括第一预编码矩阵指示PMI、第二PMI和第三PMI；其中，所述第一PMI用于指示所述第一参考时间单元和所述第二参考时间单元对应的矩阵W 1，所述第二PMI用于指示所述第一参考时间单元对应的矩阵
Figure PCTCN2018074837-appb-000130
所述第三PMI用于指示所述第二参考时间单元对应的矩阵
Figure PCTCN2018074837-appb-000131
所述第一参考时间单元对应的预编码矩阵满足
Figure PCTCN2018074837-appb-000132
所述第二参考时间单元对应的预编码矩阵满足
Figure PCTCN2018074837-appb-000133
结合第二方面，在第二方面的某些实现方式中，所述第三PMI用于指示相位的相对值Δc n，所述相位的相对值Δc n具体用于表示所述
Figure PCTCN2018074837-appb-000134
中第n列中
Figure PCTCN2018074837-appb-000135
与所述
Figure PCTCN2018074837-appb-000136
中对应位置的系数
Figure PCTCN2018074837-appb-000137
之间的相对值，n∈{1,2,...,N-1}，N为正整数。
结合第二方面，在第二方面的某些实现方式中，若
Figure PCTCN2018074837-appb-000138
则
Figure PCTCN2018074837-appb-000139
或
Figure PCTCN2018074837-appb-000140
其中，
Figure PCTCN2018074837-appb-000141
表示复数
Figure PCTCN2018074837-appb-000142
的相位，
Figure PCTCN2018074837-appb-000143
表示复数
Figure PCTCN2018074837-appb-000144
的相位。
结合第二方面，在第二方面的某些实现方式中，所述第三PMI用于指示幅度的相对值Δp x,y,z，所述幅度的相对值Δp x,y,z具体用于表示所述
Figure PCTCN2018074837-appb-000145
中第x×l+z行第y列的幅度系数
Figure PCTCN2018074837-appb-000146
与所述
Figure PCTCN2018074837-appb-000147
中对应位置的幅度系数
Figure PCTCN2018074837-appb-000148
之间的相对值；和/或
所述第三PMI用于指示相位的相对值Δc x,y,z，所述相位的相对值Δc x,y,z具体用于表示所述
Figure PCTCN2018074837-appb-000149
中第x×l+z行第y列的相位系数
Figure PCTCN2018074837-appb-000150
与所述
Figure PCTCN2018074837-appb-000151
中对应位置的相位系数
Figure PCTCN2018074837-appb-000152
之间的相对值；
其中，矩阵
Figure PCTCN2018074837-appb-000153
和
Figure PCTCN2018074837-appb-000154
均为2l行N列的矩阵，l和N均为正整数，x和z表示
Figure PCTCN2018074837-appb-000155
和
Figure PCTCN2018074837-appb-000156
的行号，y表示
Figure PCTCN2018074837-appb-000157
和
Figure PCTCN2018074837-appb-000158
的列号，x∈{0,1}，z∈{1,2,...,l}，y∈{1,2,...,N}。
结合第二方面，在第二方面的某些实现方式中，
Figure PCTCN2018074837-appb-000159
或
Figure PCTCN2018074837-appb-000160
结合第二方面，在第二方面的某些实现方式中，若
Figure PCTCN2018074837-appb-000161
则
Figure PCTCN2018074837-appb-000162
或
Figure PCTCN2018074837-appb-000163
其中，j 2＝-1，
Figure PCTCN2018074837-appb-000164
表示为复数
Figure PCTCN2018074837-appb-000165
的相位，
Figure PCTCN2018074837-appb-000166
表示为复数
Figure PCTCN2018074837-appb-000167
的相位。
结合第二方面，在第二方面的某些实现方式中，所述方法还包括：所述第二通信装置从所述第一通信装置接收第二CSI，所述第二CSI包括第二CQI，所述第二CQI是根据标识为q的时间单元对应的矩阵
Figure PCTCN2018074837-appb-000168
确定的，所述标识为q的时间单元对应的预编码矩阵满足
Figure PCTCN2018074837-appb-000169
矩阵
Figure PCTCN2018074837-appb-000170
为2l行N′列的矩阵，q为大于m-n 1和m-n 1-n 2的正整数，N′为正整数。
结合第二方面，在第二方面的某些实现方式中，所述
Figure PCTCN2018074837-appb-000171
是根据所述第二PMI、所述第三PMI以及下列公式，计算出的所述
Figure PCTCN2018074837-appb-000172
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000173
和/或所述
Figure PCTCN2018074837-appb-000174
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000175
确定的，
Figure PCTCN2018074837-appb-000176
Figure PCTCN2018074837-appb-000177
其中，Y表示标识q和第一参考时间单元的标识之差与第一参考时间单元的标识和第二参考时间单元的标识之差的比值，y′∈{1,2,...N′}，N′≤N。
结合第二方面，在第二方面的某些实现方式中，
Figure PCTCN2018074837-appb-000178
或
Figure PCTCN2018074837-appb-000179
结合第二方面，在第二方面的某些实现方式中，
Figure PCTCN2018074837-appb-000180
或
Figure PCTCN2018074837-appb-000181
结合第二方面，在第二方面的某些实现方式中，所述
Figure PCTCN2018074837-appb-000182
是根据所述第二PMI、所述第三PMI以及下列公式，计算出的所述
Figure PCTCN2018074837-appb-000183
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000184
和/或所述
Figure PCTCN2018074837-appb-000185
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000186
确定的，
Figure PCTCN2018074837-appb-000187
Figure PCTCN2018074837-appb-000188
其中，Y表示标识q和第一参考时间单元的标识之差与第一参考时间单元的标识和第二参考时间单元的标识之差的比值，y′∈{1,2,...N′}，N′≤N。
结合第二方面，在第二方面的某些实现方式中，所述
Figure PCTCN2018074837-appb-000189
是根据所述第二PMI、所述第三PMI以及下列公式，计算出的所述
Figure PCTCN2018074837-appb-000190
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000191
和/或所述
Figure PCTCN2018074837-appb-000192
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000193
确定的，
Figure PCTCN2018074837-appb-000194
Figure PCTCN2018074837-appb-000195
其中，Y表示标识q和第一参考时间单元的标识之差与第一参考时间单元的标识和第 二参考时间单元的标识之差的比值，y′∈{1,2,...N′}，N′≤N。
结合第二方面，在第二方面的某些实现方式中，所述
Figure PCTCN2018074837-appb-000196
是根据所述第二PMI、所述第三PMI以及下列公式，计算出的所述
Figure PCTCN2018074837-appb-000197
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000198
和/或所述
Figure PCTCN2018074837-appb-000199
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000200
确定的，
Figure PCTCN2018074837-appb-000201
Figure PCTCN2018074837-appb-000202
其中，Y表示标识q和第一参考时间单元的标识之差与第一参考时间单元的标识和第二参考时间单元的标识之差的比值，y′∈{1,2,...N′}，N′≤N。
结合第二方面，在第二方面的某些实现方式中，所述第一CSI包括第四PMI和第五PMI，其中，所述第四PMI用于指示所述第一参考时间单元对应的预编码矩阵W (1)，所述第五PMI用于指示所述第二参考时间单元对应的预编码矩阵W (2)。
结合第二方面，在第二方面的某些实现方式中，所述第五PMI用于指示系数的相对值Δw r,t，所述系数的相对值Δw r,t具体用于表示所述W (2)中第r行第t列的系数
Figure PCTCN2018074837-appb-000203
与所述W (1)中对应位置的系数
Figure PCTCN2018074837-appb-000204
之间的相对值；其中，矩阵W (1)和W (2)均为N t行N列的矩阵，N t和N均为正整数，r表示W (1)和W (2)的行号，t表示W (1)和W (2)的列号，r∈{1,2,...,N t}，t∈{1,2,...,N}。
结合第二方面，在第二方面的某些实现方式中，所述方法还包括：所述第二通信装置向所述第一通信装置发送配置信息，所述配置信息用于指示所述第二CSI依赖于所述第一CSI。
结合第二方面，在第二方面的某些实现方式中，在所述第二通信装置向第一通信装置发送参考信号之前，所述方法还包括：所述第二通信装置向所述第一通信装置发送第一指示信息，所述第一指示信息用于指示至少两个参考信号的传输；所述第二通信装置向第一通信装置发送参考信号，包括：所述第二通信装置向所述第一通信装置发送第一参考信号和第二参考信号，所述第一参考信号用于测量所述第一参考时间单元的信道状态，所述第二参考信号用于测量所述第二参考时间单元的信道状态。
结合第二方面，在第二方面的某些实现方式中，所述方法还包括：所述第二通信装置从所述第一通信装置接收第二指示信息，所述第二指示信息用于指示所述第一CSI是否可用。
结合第二方面，在第二方面的某些实现方式中，对于周期性CSI上报模式，所述第一CSI是所述第一通信装置在第一上报周期内的上报时刻发送的，所述第二CSI是所述第一通信装置在第二上报周期内的上报时刻发送的，所述第一上报周期大于所述第二上报周期。
结合第二方面，在第二方面的某些实现方式中，所述n 1的取值为协议约定的或所述第二通信装置通过信令为所述第一通信装置配置的；和/或所述n 2的取值为协议约定的或所述第二通信装置通过信令为所述第一通信装置配置的。
第三方面，提供了另一种上报CSI的方法，包括：第一通信装置从第二通信装置接收参考信号；所述第一通信装置根据所述参考信号进行信道测量，在标识为K的时间单元上向所述第二通信装置发送第三CSI，所述第三CSI用于表示第三参考时间单元上的信道状态；其中，所述第三参考时间单元的标识为K+n 3，K为整数，n 3为正整数。
本申请实施例的上报CSI的方法，第一通信装置可以在标识为K的时间单元上向第二通信装置反馈第三CSI，该第三CSI表示标识为K+n 3的第三参考时间单元的信道状态，以便第二通信装置直接获取到最新的信道状态，有利于提高第二通信装置所应用的CSI与当前时刻的信道的匹配度，进而提高数据传输性能。
结合第三方面，在第三方面的某些实现方式中，在第一通信装置从第二通信装置接收参考信号之前，所述方法还包括：所述第一通信装置从所述第二通信装置接收第三指示信息，所述第三指示信息用于指示至少两个参考信号的传输；所述第一通信装置从第二通信装置接收参考信号，包括：所述第一通信装置根据所述第三指示信息，从所述第二通信装置接收第三参考信号和第四参考信号；所述方法还包括：所述第一通信装置根据所述第三参考信号和所述第四参考信号，确定所述第三CSI。
结合第三方面，在第三方面的某些实现方式中，所述第一通信装置接收第四指示信息，所述第四指示信息用于指示所述至少两个参考信号的时域位置，所述至少两个参考信号中每个参考信号的时域位置不同。
具体而言，第二通信装置可以为第一通信装置发送第四指示信息，用于指示上述至少两个参考信号的时域位置(例如，CSI-RS资源)。在本申请实施例中，对于配置了至少两个参考信号的时域位置的情况，第一通信装置上报的第三CSI中可以包括RI、PMI和CQI，但不会包括参考信号资源指示(CSI-RS resource indicator，CRI)。
第四方面，提供了一种上报CSI的装置，用于执行第一方面或第一方面任意可能的实现方式中的方法。具体地，该装置包括用于执行上述第一方面或第一方面的任一种可能的实现方式中的方法的单元。
第五方面，提供了另一种上报CSI的装置，用于执行第二方面或第二方面任意可能的实现方式中的方法。具体地，该装置包括用于执行上述第二方面或第二方面的任一种可能的实现方式中的方法的单元。
第六方面，提供了另一种上报CSI的装置，用于执行第三方面或第三方面任意可能的实现方式中的方法。具体地，该装置包括用于执行上述第三方面或第三方面的任一种可能的实现方式中的方法的单元。
第七方面，提供了另一种上报CSI的装置，该装置包括：收发器、存储器和处理器。其中，该收发器、该存储器和该处理器通过内部连接通路互相通信，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，使得该处理器执行第一方面或第一方面的任一种可能的实现方式中的方法。
第八方面，提供了另一种上报CSI的装置，该装置包括：收发器、存储器和处理器。其中，该收发器、该存储器和该处理器通过内部连接通路互相通信，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送信号，并且当该处理器执行该存储器存储的指令时，使得该处理器执行第二方面或第二方面的任一种可能的实现方式中的方法。
第九方面，提供了另一种上报CSI的装置，该装置包括：收发器、存储器和处理器。其中，该收发器、该存储器和该处理器通过内部连接通路互相通信，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，以控制接收器接收信号，并控制发送器发送 信号，并且当该处理器执行该存储器存储的指令时，使得该处理器执行第三方面或第三方面的任一种可能的实现方式中的方法。
第十方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被计算机运行时，使得所述计算机执行上述各方面中的方法。
第十一方面，提供了一种计算机可读介质，用于存储计算机程序，该计算机程序包括用于执行上述各方面中的方法的指令。
第十二方面，提供一种芯片***，包括：输入接口、输出接口、至少一个处理器、存储器，所述输入接口、输出接口、所述处理器以及所述存储器之间通过内部连接通路相连，所述处理器用于执行所述存储器中的代码，当所述代码被执行时，所述处理器用于执行上述各方面中的方法。
附图说明
图1示出了本申请实施例的通信***的示意图。
图2示出了根据本申请实施例的上报CSI的方法的示意性流程图。
图3示出了根据本申请实施例的另一上报CSI的方法的示意性流程图。
图4示出了根据本申请实施例的上报CSI的装置的示意性框图。
图5示出了根据本申请实施例的另一上报CSI的装置的示意性框图。
图6示出了根据本申请实施例的另一上报CSI的装置的示意性框图。
图7示出了根据本申请实施例的另一上报CSI的装置的示意性框图。
图8示出了根据本申请实施例的另一上报CSI的装置的示意性框图。
图9示出了根据本申请实施例的另一上报CSI的装置的示意性框图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
应理解，本申请实施例的技术方案可以应用于各种通信***，例如：全球移动通信(global system of mobile communication，GSM)***、码分多址(code division multiple access，CDMA)***、宽带码分多址(wideband code division multiple access，WCDMA)***、通用分组无线业务(general packet radio service，GPRS)、长期演进(long term evolution，LTE)***、LTE频分双工(frequency division duplex，FDD)***、LTE时分双工(time division duplex，TDD)、通用移动通信***(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信***、未来的第五代(5th generation，5G)***或新无线(new radio，NR)等。
还应理解，本申请实施例的技术方案还可以应用于各种基于非正交多址接入技术的通信***，例如稀疏码多址接入(sparse code multiple access，SCMA)***，当然SCMA在通信领域也可以被称为其他名称；进一步地，本申请实施例的技术方案可以应用于采用非正交多址接入技术的多载波传输***，例如采用非正交多址接入技术正交频分复用(orthogonal frequency division multiplexing，OFDM)、滤波器组多载波(filter bank multi-carrier，FBMC)、通用频分复用(generalized frequency division multiplexing，GFDM)、滤波正交频分复用(filtered-OFDM，F-OFDM)***等。
还应理解，在本申请实施例中，终端设备可以经无线接入网(radio access network，RAN)与一个或多个核心网进行通信，该终端设备可称为接入终端、用户设备(user equipment，UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、未来5G网络中的终端设备或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的终端设备等。
还应理解，在本申请实施例中，网络设备可用于与终端设备通信，该网络设备可以是GSM***或CDMA***中的基站(base transceiver station，BTS)，也可以是WCDMA***中的基站(node B，NB)，还可以是LTE***中的演进型基站(evolutional node B，eNB或eNode B)，或者该网络设备可以为中继站、接入点、车载设备、可穿戴设备、未来5G网络中的网络侧设备或者未来演进的PLMN网络中的网络设备等。
本申请实施例可以适用于LTE***以及后续的演进***如5G等，或其他采用各种无线接入技术的无线通信***，如采用码分多址，频分多址，时分多址，正交频分多址，单载波频分多址等接入技术的***，尤其适用于需要信道信息反馈和/或应用二级预编码技术的场景，例如应用Massive MIMO技术的无线网络、应用分布式天线技术的无线网络等。
应理解，多输入输出(multiple-input multiple-output，MIMO)技术是指在发送端设备和接收端设备分别使用多个发射天线和接收天线，使信号通过发送端设备与接收端设备的多个天线传送和接收，从而改善通信质量。它能充分利用空间资源，通过多个天线实现多发多收，在不增加频谱资源和天线发射功率的情况下，可以成倍地提高***信道容量。
MIMO可以分为单用户多输入多输出(single-user MIMO，SU-MIMO)和多用户多输入多输出(multi-user MIMO，MU-MIMO)。Massive MIMO基于多用户波束成形的原理，在发送端设备布置几百根天线，对几十个目标接收机调制各自的波束，通过空间信号隔离，在同一频率资源上同时传输几十条信号。因此，Massive MIMO技术能够充分利用大规模天线配置带来的空间自由度，提升频谱效率。
图1是本申请实施例所用的通信***的示意图。如图1所示，该通信***100包括网络设备102，网络设备102可包括多个天线组。每个天线组可以包括一个或多个天线，例如，一个天线组可包括天线104和106，另一个天线组可包括天线108和110，附加组可包括天线112和114。图1中对于每个天线组示出了2个天线，然而可以对于每个组使用更多或更少的天线。网络设备102可附加地包括发射机链和接收机链，本领域普通技术人员可以理解，它们均可包括与信号发送和接收相关的多个部件，例如处理器、调制器、复用器、解调器、解复用器或天线等。
网络设备102可以与多个终端设备通信，例如，网络设备102可以与终端设备116和终端设备122通信。然而，可以理解，网络设备102可以与类似于终端设备116或122的任意数目的终端设备通信。终端设备116和122可以是例如蜂窝电话、智能电话、便携式电脑、手持通信设备、手持计算设备、卫星无线电装置、全球定位***、PDA和/或用于在无线通信***100上通信的任意其它适合设备。
如图1所示，终端设备116与天线112和114通信，其中天线112和114通过前向链路118向终端设备116发送信息，并通过反向链路120从终端设备116接收信息。此外，终端设备122与天线104和106通信，其中天线104和106通过前向链路124向终端设备122发送信息，并通过反向链路126从终端设备122接收信息。
例如，在频分双工FDD***中，例如，前向链路118可利用与反向链路120所使用的不同频带，前向链路124可利用与反向链路126所使用的不同频带。
再例如，在时分双工TDD***和全双工(full duplex)***中，前向链路118和反向链路120可使用共同频带，前向链路124和反向链路126可使用共同频带。
被设计用于通信的每组天线和/或区域称为网络设备102的扇区。例如，可将天线组设计为与网络设备102覆盖区域的扇区中的终端设备通信。在网络设备102通过前向链路118和124分别与终端设备116和122进行通信的过程中，网络设备102的发射天线可利用波束成形来改善前向链路118和124的信噪比。此外，与网络设备通过单个天线向它所有的终端设备发送信号的方式相比，在网络设备102利用波束成形向相关覆盖区域中随机分散的终端设备116和122发送信号时，相邻小区中的移动设备会受到较少的干扰。
在给定时间，网络设备102、终端设备116或终端设备122可以是无线通信发送装置和/或无线通信接收装置。当发送数据时，无线通信发送装置可对数据进行编码以用于传输。具体地，无线通信发送装置可获取要通过信道发送至无线通信接收装置的一定数目的数据比特，例如，无线通信发送装置可生成、从其它通信装置接收、或在存储器中保存等要通过信道发送至无线通信接收装置的一定数目的数据比特。这种数据比特可包含在数据的传输块或多个传输块中，传输块可被分段以产生多个码块。
此外，该通信***100可以是公共陆地移动网络PLMN网络或者设备对设备(device to device，D2D)网络或者机器对机器(machine to machine，M2M)网络或者其他网络，图1仅为便于理解而示例的简化示意图，网络中还可以包括其他网络设备，图1中未予以画出。
为便于理解，下面先介绍本申请实施例涉及的相关术语。
时间单元：可以为子帧(frame)，也可以为时隙(slot)，还可以为符号(symbol)。时间单元的标识具体可以为子帧、时隙或符号的标识，以符号的标识为例，在一个资源单元(包括一个或多个资源块(resource block，RB))中，符号的标识可以为0～6(或1～7)，也可以为0～13(或1～14)。
一般情况下，时间单元的标识都是循环往复的，例如，在每个资源单元中，符号的标识均为0～13，对于多个资源单元，符号的标识依次为0～13、0～13、…、0～13等等。若某个时间单元的标识为负值，那么该时间单元为从当前时刻对应的资源单元中向前递推相应的值所对应的时间单元。例如，根据上面的定义，可能存在某个时间单元的标识为-2，若当前时刻对应的资源单元为0～13、0～13、…、0～13中的第二个资源单元，那么向前递推，标识为-2的时间单元表示的就是第一个资源单元中标识为12的时间单元。
图2示出了本申请实施例的上报CSI的方法200的示意性流程图。该方法200可以应用于图1所示的通信***100，但本申请实施例不限于此。
S210，第二通信装置向第一通信装置发送参考信号；对应地，所述第一通信装置从所述第二通信装置接收所述参考信号；
S220，所述第一通信装置根据所述参考信号进行信道测量；
S230，所述第一通信装置在标识为m的时间单元上向所述第二通信装置发送第一信道状态信息CSI，所述第一CSI用于表示第一参考时间单元和第二参考时间单元上的信道状态；对应地，所述第二通信装置接收所述第一通信装置发送的所述第一CSI；其中，所述第一参考时间单元的标识为m-n 1，所述第二参考时间单元的标识为m-n 1-n 2，m、n 1和n 2为整数，且n 2不等于零。
具体地，为了获取信道状态信息CSI，第二通信装置可以向第一通信装置发送参考信号，第一通信装置接收该参考信号并进行信道测量，将获得的第一CSI反馈给第二通信装置。在本申请实施例中，第一通信装置在标识为m的时间单元上向第二通信装置反馈第一CSI，且该第一CSI用于表示标识为m-n 1的第一参考时间单元的信道状态和标识为m-n 1-n 2的第二参考时间单元的信道状态。
进一步地，第二通信装置获取到该第一CSI，在信道发生变化的情况下，该第二通信装置可以根据该第一CSI中携带的信息预测其他时刻的信道状态，但本申请实施例对此不作限定。
应理解，第一通信装置反馈CSI对于时延比较敏感，特别是对于移动速度较高的第一通信装置而言，由于CSI反映的是测量时刻的信道状态，若第一通信装置的移动造成信道的变化，第二通信装置接收到的CSI并不能完全反映出当前时刻的信道状态了。在这种情况下，若该第二通信装置直接应用该第一通信装置反馈的CSI，会导致该CSI与当前时刻的信道的匹配度下降，影响数据传输性能。
而在本申请实施例的上报CSI的方法中，第一通信装置可以在一次CSI反馈中向第二通信装置反馈至少两个时间单元的信道状态，以便第二通信装置对所要应用的CSI进行预估，有利于提高第二通信装置所应用的CSI与当前时刻的信道的匹配度，进而提高数据传输性能。
在本申请实施例中，由于n 2不等于零，m-n 1不等于m-n 1-n 2，即所述第一参考时间单元和所述第二参考时间单元不相同。应理解，在本申请实施例中，m为整数，表示当前CSI上报时刻的时间单元的标识，m-n 1和m-n 1-n 2可以是正整数，也可以是负整数，本申请实施例对此不作限定。
此外，在一种可能的实现方式中，上述参考时间单元可以通过参考资源来表示，参考资源一般可以包括时域资源和频域资源，时域资源即为上述参考时间单元，但本申请实施例对此不作限定。
还应理解，上述第一通信装置可以为终端设备，也可以为设置于终端设备内的芯片***，第二通信装置可以为网络设备，也可以为设置于网络设备内的芯片***，但本申请实施例对此不作限定。上述芯片***可以包括输入接口、输出接口、至少一个处理器、存储器，该输入接口、输出接口、处理器以及存储器之间通过内部连接通路互相通信，该处理器用于执行该存储器中的代码。
在一种具体的实现方式中，上述参考信号为信道状态信息参考信号(channel state indication-reference signal，CSI-RS)。
在上述方法200中，第一通信装置和第二通信装置之间的信令传输可以是直接传输，也可以是间接传输，即通过中继设备进行传输，因此，本申请实施例还可以应用于存在中 继设备的应用场景或设备到设备通信(device-to-device，D2D)的应用场景，本申请实施例对此不作限定。
第一通信装置在反馈上述第一CSI时，可以采用单码本的结构，也可以采用双码本的结构，即两级码本，本申请实施例对此不作限定。应理解，本文采用上标(1)表示第一参考时间单元对应的参数，上标(2)表示第二参考时间单元对应的参数，其他上标类似，此处不再一一列举。下面先对双码本的结构进行说明。
作为一个可选的实施例，所述第一CSI包括第一预编码矩阵指示PMI、第二PMI和第三PMI；其中，所述第一PMI用于指示所述第一参考时间单元和所述第二参考时间单元对应的矩阵W 1，所述第二PMI用于指示所述第一参考时间单元对应的矩阵
Figure PCTCN2018074837-appb-000205
所述第三PMI用于指示所述第二参考时间单元对应的矩阵
Figure PCTCN2018074837-appb-000206
所述第一参考时间单元对应的预编码矩阵满足
Figure PCTCN2018074837-appb-000207
所述第二参考时间单元对应的预编码矩阵满足
Figure PCTCN2018074837-appb-000208
具体地，预编码矩阵指示(pre-coding matrix indicator，PMI)用于从预定义的码本中指示第一通信装置推荐的进行数据传输时采用的预编码矩阵。上述第一CSI可以包括第一PMI、第二PMI和第三PMI。第一PMI用于指示矩阵W 1，该W 1在第一参考时间单元和第二参考时间单元上都是适用的。第二PMI用于指示第一参考时间单元对应的矩阵
Figure PCTCN2018074837-appb-000209
第三PMI用于指示第二参考时间单元对应的矩阵
Figure PCTCN2018074837-appb-000210
在接收到双码本结构的第一CSI的情况下，第二通信装置可以根据W 1和
Figure PCTCN2018074837-appb-000211
计算出第一参考时间单元的预编码矩阵W (1)，根据W 1和
Figure PCTCN2018074837-appb-000212
计算出第二参考时间单元的预编码矩阵W (2)。由于W 1在整个通信带宽上是相同的，第一通信装置可以通过上述双码本结构进行CSI反馈可以降低反馈开销。
应理解，第一通信装置反馈至第二通信装置的CSI一般还可以包括秩指示(rank indication，RI)和信道质量指示(channel quality indication，CQI)等参数。其中，RI表示第一通信装置推荐的、第二通信装置在相同的时频资源上同时传输给该第一通信装置的数据层数，CQI表示第一通信装置的信道质量，用于推荐给第二通信装置选择合适的调制方式和编码速率。
上述第三PMI可以直接指示第二参考时间单元对应的矩阵
Figure PCTCN2018074837-appb-000213
也可以包括矩阵
Figure PCTCN2018074837-appb-000214
和矩阵
Figure PCTCN2018074837-appb-000215
中幅度的相对值和/或相位的相对值，本申请实施例对此不作限定。但应理解，采用幅度的相对值和/或相位的相对值能够进一步节省第一通信装置的CSI反馈开销。
具体地，矩阵W 1为对角块阵，即
Figure PCTCN2018074837-appb-000216
其中矩阵A包含l个列向量，l≥1，A＝[b 0 b 1 ... b l-1]，其中b s为长度为N t/2的列向量，N t为正整数，s∈{0,1,...,l-1}。所述矩阵
Figure PCTCN2018074837-appb-000217
和矩阵
Figure PCTCN2018074837-appb-000218
为2l行N列的矩阵，l和N均为正整数。根据表示形态，
Figure PCTCN2018074837-appb-000219
和
Figure PCTCN2018074837-appb-000220
可以分为第一类型码本和第二类型码本。
对于第一类型码本，
Figure PCTCN2018074837-appb-000221
的第n列表示形式为
Figure PCTCN2018074837-appb-000222
Figure PCTCN2018074837-appb-000223
的第n列表示形式为
Figure PCTCN2018074837-appb-000224
其中，n∈{1,2,...,N-1}，e k为l×1的列向量，其第k个元素为1，其余的元素为1，
Figure PCTCN2018074837-appb-000225
和
Figure PCTCN2018074837-appb-000226
均为模为1的复数，可以表示为
Figure PCTCN2018074837-appb-000227
其 中
Figure PCTCN2018074837-appb-000228
表示复数
Figure PCTCN2018074837-appb-000229
的相位，
Figure PCTCN2018074837-appb-000230
表示复数
Figure PCTCN2018074837-appb-000231
的相位。
对于第二类型码本，
Figure PCTCN2018074837-appb-000232
的表示形式为
Figure PCTCN2018074837-appb-000233
其中，h x,y,z和
Figure PCTCN2018074837-appb-000234
为实数，
Figure PCTCN2018074837-appb-000235
为模为1的复数，且
Figure PCTCN2018074837-appb-000236
其中
Figure PCTCN2018074837-appb-000237
表示为复数
Figure PCTCN2018074837-appb-000238
的相位，x和z表示
Figure PCTCN2018074837-appb-000239
和
Figure PCTCN2018074837-appb-000240
的行号，y表示
Figure PCTCN2018074837-appb-000241
和
Figure PCTCN2018074837-appb-000242
的列号，x∈{0,1}，y∈{1,2,...,N}，z∈{1,2,...,l}。
Figure PCTCN2018074837-appb-000243
的表示形式为
Figure PCTCN2018074837-appb-000244
其中，h x,y,z和
Figure PCTCN2018074837-appb-000245
为实数，
Figure PCTCN2018074837-appb-000246
为模为1的复数，且
Figure PCTCN2018074837-appb-000247
其中
Figure PCTCN2018074837-appb-000248
表示为复数
Figure PCTCN2018074837-appb-000249
的相位，x和z表示
Figure PCTCN2018074837-appb-000250
和
Figure PCTCN2018074837-appb-000251
的行号，y表示
Figure PCTCN2018074837-appb-000252
和
Figure PCTCN2018074837-appb-000253
的列号，x∈{0,1}，y∈{1,2,...,N}，z∈{1,2,...,l}。
作为一个可选的实施例，对于第一类型码本，所述第三PMI用于指示相位的相对值Δc n，所述相位的相对值Δc n具体用于表示所述
Figure PCTCN2018074837-appb-000254
中第n列中
Figure PCTCN2018074837-appb-000255
与所述
Figure PCTCN2018074837-appb-000256
中对应位置的系数
Figure PCTCN2018074837-appb-000257
之间的相对值。
作为一个可选的实施例，
Figure PCTCN2018074837-appb-000258
或
Figure PCTCN2018074837-appb-000259
作为一个可选的实施例，对于第二类型码本，所述第三PMI用于指示幅度的相对值Δp x,y,z，所述幅度的相对值Δp x,y,z具体用于表示所述
Figure PCTCN2018074837-appb-000260
中第x×l+z行第y列的幅度系数
Figure PCTCN2018074837-appb-000261
与所述
Figure PCTCN2018074837-appb-000262
中对应位置的幅度系数
Figure PCTCN2018074837-appb-000263
之间的相对值；和/或
所述第三PMI用于指示相位的相对值Δc x,y,z，所述相位的相对值Δc x,y,z具体用于表示所述
Figure PCTCN2018074837-appb-000264
中第x×l+z行第y列的相位系数
Figure PCTCN2018074837-appb-000265
与所述
Figure PCTCN2018074837-appb-000266
中对应位置的相位系数
Figure PCTCN2018074837-appb-000267
之间的相对值；
其中，矩阵
Figure PCTCN2018074837-appb-000268
和
Figure PCTCN2018074837-appb-000269
均为2l行N列的矩阵，l和N均为正整数，x和z表示
Figure PCTCN2018074837-appb-000270
和
Figure PCTCN2018074837-appb-000271
的行号，y表示
Figure PCTCN2018074837-appb-000272
和
Figure PCTCN2018074837-appb-000273
的列号，x∈{0,1}，z∈{1,2,...,l}，y∈{1,2,...,N}。
应理解，相对值可以表示减法运算，也可以表示除法运算，即幅度的相对值Δp x,y,z可以为
Figure PCTCN2018074837-appb-000274
与
Figure PCTCN2018074837-appb-000275
之间的差值，也可以为
Figure PCTCN2018074837-appb-000276
与
Figure PCTCN2018074837-appb-000277
之间的比值，相位的相对值Δc x,y,z类似，本申请实施例对此不作限定。但应理解，具体的计算方式需要协议约定，或者由第二通信装置通过信令配置给第一通信装置。
下面先介绍一种计算相对值的方式。
作为一个可选的实施例，
Figure PCTCN2018074837-appb-000278
或
Figure PCTCN2018074837-appb-000279
作为一个可选的实施例，若
Figure PCTCN2018074837-appb-000280
则
Figure PCTCN2018074837-appb-000281
或
Figure PCTCN2018074837-appb-000282
其中，j 2＝-1，
Figure PCTCN2018074837-appb-000283
表示为复数
Figure PCTCN2018074837-appb-000284
的相位，
Figure PCTCN2018074837-appb-000285
表示为复数
Figure PCTCN2018074837-appb-000286
的相位。
应理解，在本申请实施例中，第一通信装置除了向第二通信装置反馈上述第一CSI，还可以向第二通信装置反馈第二CSI，该第二CSI用于表示标识为q的时间单元上的信道状态。在具体实现时，该第二CSI可以是第一通信装置根据参考信号进行信道测量得到的，也可以是该第一通信装置根据第一CSI，进行预测得到的，本申请实施例对此不作限定。下面对第一通信装置根据第一CSI，预测获得第二CSI的方法进行详细说明。
作为一个可选的实施例，所述方法还包括：
所述第一通信装置根据所述第二PMI和所述第三PMI，确定标识为q的时间单元对应的矩阵
Figure PCTCN2018074837-appb-000287
所述标识为q的时间单元对应的预编码矩阵满足
Figure PCTCN2018074837-appb-000288
矩阵
Figure PCTCN2018074837-appb-000289
为2l行N′列的矩阵，q为大于m-n 1和m-n 1-n 2的正整数，N′为正整数；
所述第一通信装置根据所述
Figure PCTCN2018074837-appb-000290
确定所述标识为q的时间单元上的第二CQI；
所述第一通信装置向所述第二通信装置发送第二CSI，所述第二CSI包括所述第二CQI。
则对应地，所述第二通信装置从所述第一通信装置接收所述第二CSI。
具体地，第一通信装置可以根据第一CSI中包括的第二PMI和第三PMI，确定标识为q的时间单元对应的矩阵
Figure PCTCN2018074837-appb-000291
再根据
Figure PCTCN2018074837-appb-000292
确定标识为q的时间单元上的第二CQI，然后向第二通信装置发送该第二CQI。矩阵
Figure PCTCN2018074837-appb-000293
为2l行N′列的矩阵。
作为一个可选的实施例，所述
Figure PCTCN2018074837-appb-000294
是根据所述第二PMI、所述第三PMI以及下列公式，计算出的所述
Figure PCTCN2018074837-appb-000295
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000296
和/或所述
Figure PCTCN2018074837-appb-000297
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000298
确定的，
Figure PCTCN2018074837-appb-000299
Figure PCTCN2018074837-appb-000300
其中，Y表示标识q和第一参考时间单元的标识之差与第一参考时间单元的标识和第二参考时间单元的标识之差的比值，y′∈{1,2,...N′}，N′≤N。
具体而言，第一通信装置计算标识为q的时间单元对应的矩阵
Figure PCTCN2018074837-appb-000301
可以根据第二PMI所指示的矩阵
Figure PCTCN2018074837-appb-000302
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000303
和第三PMI所指示的第x×l+z行第y′列的幅度的相对值Δp x,y′,z，得到
Figure PCTCN2018074837-appb-000304
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000305
同理，该第一通信装置还可以根据第二PMI所指示的矩阵
Figure PCTCN2018074837-appb-000306
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000307
和第三PMI所指示的第x×l+z行第y′列的相位的相对值Δc x,y′,z，得到
Figure PCTCN2018074837-appb-000308
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000309
下面介绍另一种计算相对值的方式。
作为一个可选的实施例，
Figure PCTCN2018074837-appb-000310
或
Figure PCTCN2018074837-appb-000311
作为一个可选的实施例，
Figure PCTCN2018074837-appb-000312
或
Figure PCTCN2018074837-appb-000313
作为一个可选的实施例，所述
Figure PCTCN2018074837-appb-000314
是根据所述第二PMI、所述第三PMI以及下列公式，计算出的所述
Figure PCTCN2018074837-appb-000315
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000316
和/或所述
Figure PCTCN2018074837-appb-000317
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000318
确定的，
Figure PCTCN2018074837-appb-000319
Figure PCTCN2018074837-appb-000320
其中，Y表示标识q和第一参考时间单元的标识之差与第一参考时间单元的标识和第二参考时间单元的标识之差的比值，y′∈{1,2,...N′}，N′≤N。
同理，第一通信装置可以根据第一CSI中包括的第二PMI和第三PMI，按照上述公式确定出标识为q的时间单元对应的矩阵
Figure PCTCN2018074837-appb-000321
再根据
Figure PCTCN2018074837-appb-000322
确定标识为q的时间单元上的第二CQI，然后向第二通信装置发送该第二CQI。
作为一个可选的实施例，所述
Figure PCTCN2018074837-appb-000323
是根据所述第二PMI、所述第三PMI以及下列公式，计算出的所述
Figure PCTCN2018074837-appb-000324
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000325
和/或所述
Figure PCTCN2018074837-appb-000326
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000327
确定的，
Figure PCTCN2018074837-appb-000328
Figure PCTCN2018074837-appb-000329
其中，Y表示标识q和第一参考时间单元的标识之差与第一参考时间单元的标识和第二参考时间单元的标识之差的比值，y′∈{1,2,...N′}，N′≤N。
作为一个可选的实施例，所述
Figure PCTCN2018074837-appb-000330
是根据所述第二PMI、所述第三PMI以及下列公式，计算出的所述
Figure PCTCN2018074837-appb-000331
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000332
和/或所述
Figure PCTCN2018074837-appb-000333
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000334
确定的，
Figure PCTCN2018074837-appb-000335
Figure PCTCN2018074837-appb-000336
其中，Y表示标识q和第一参考时间单元的标识之差与第一参考时间单元的标识和第二参考时间单元的标识之差的比值，y′∈{1,2,...N′}，N′≤N。
下面介绍单码本结构的CSI反馈。
作为一个可选的实施例，所述第一CSI包括第四PMI和第五PMI，其中，所述第四PMI用于指示所述第一参考时间单元对应的预编码矩阵W (1)，所述第五PMI用于指示所述第二参考时间单元对应的预编码矩阵W (2)。
具体地，在单码本结构下，上述第一CSI可以直接包括用于指示W (1)的第四PMI和用于指示W (2)的第五PMI。第一通信装置采用单码本结构向第二通信装置上报第一CSI，第二通信装置在收到该第一CSI之后，可以直接根据该第一CSI确定第一参考时间单元对应的预编码矩阵W (1)和第二参考时间单元对应的预编码矩阵W (2)，降低了第二通信装置的计算复杂度。
作为一个可选的实施例，所述第五PMI用于指示系数的相对值Δw r,t，所述系数的相对值Δw r,t具体用于表示所述W (2)中第r行第t列的系数
Figure PCTCN2018074837-appb-000337
与所述W (1)中对应位置的系数
Figure PCTCN2018074837-appb-000338
之间的相对值；其中，矩阵W (1)和W (2)均为N t行N列的矩阵，N t和N均为正整数，r表示W (1)和W (2)的行号，t表示W (1)和W (2)的列号，r∈{1,2,...,N t}，t∈{1,2,...,N}。
应理解，相对值可以表示减法运算，也可以表示除法运算，即系数的相对值Δw r,t可以为
Figure PCTCN2018074837-appb-000339
与
Figure PCTCN2018074837-appb-000340
之间的差值，也可以为
Figure PCTCN2018074837-appb-000341
与
Figure PCTCN2018074837-appb-000342
之间的比值。但应理解，具体的计算方式需要协议约定，或者由第二通信装置通过信令配置给第一通信装置。
作为一个可选的实施例，所述方法还包括：
第一通信装置根据所述第四PMI和所述第五PMI，确定标识为q的时间单元对应的矩阵
Figure PCTCN2018074837-appb-000343
矩阵
Figure PCTCN2018074837-appb-000344
为N t行N′列的矩阵，q为大于m-n 1和m-n 1-n 2的正整数；
所述第一通信装置根据所述
Figure PCTCN2018074837-appb-000345
确定所述标识为q的时间单元上的第二CQI；
所述第一通信装置向所述第二通信装置发送第二CSI，所述第二CSI包括所述第二CQI。
则对应地，所述第二通信装置从所述第一通信装置接收所述第二CSI。
作为一个可选的实施例，所述方法还包括：
所述第二通信装置向所述第一通信装置发送配置信息，所述配置信息用于指示所述第二CSI依赖于所述第一CSI；
则对应地，所述第一通信装置从所述第二通信装置接收所述配置信息；
所述第一通信装置根据所述第二PMI和所述第三PMI，确定标识为q的时间单元对应的矩阵
Figure PCTCN2018074837-appb-000346
包括：
所述第一通信装置根据所述配置信息、所述第二PMI和所述第三PMI，确定所述
Figure PCTCN2018074837-appb-000347
具体地，第二通信装置可以向第一通信装置发送配置信息，用于指示第二CSI依赖于第一CSI。这样，在双码本结构下，第一通信装置就可以按照第一CSI中包括的第二PMI和第三PMI，计算
Figure PCTCN2018074837-appb-000348
从而计算出第二CQI。在单码本结构下，第一通信装置就可以按照第一CSI中包括的第四PMI和第五PMI，计算W (q)，从而计算出第二CQI。在一种可能的实现方式中，上述配置信息可以为CSI上报索引。
作为一个可选的实施例，在第一通信装置从第二通信装置接收参考信号之前，所述方法还包括：
所述第二通信装置向所述第一通信装置发送第一指示信息，所述第一指示信息用于指示至少两个参考信号的传输；则对应地，所述第一通信装置从所述第二通信装置接收所述第一指示信息；
所述第二通信装置向第一通信装置发送参考信号，包括：
所述第二通信装置向所述第一通信装置发送第一参考信号和第二参考信号，所述第一参考信号用于测量所述第一参考时间单元的信道状态，所述第二参考信号用于测量所述第二参考时间单元的信道状态；
所述第一通信装置从第二通信装置接收参考信号，包括：
所述第一通信装置根据所述第一指示信息，从所述第二通信装置接收所述第一参考信号和所述第二参考信号。
在本申请实施例中，第二通信装置的一个触发信令可以触发至少两个参考信号的传输。具体地，第二通信装置可以向第一通信装置发送第一指示信息，用于指示至少两个参考信号的传输，该第二通信装置向第一通信装置发送第一参考信号和第二参考信号，该第一通 信装置采用第一参考信号测量第一参考时间单元上的信道状态，采用第二参考信号测量第二参考时间单元上的信道状态，结合第一参考时间单元上的信道状态和第二参考时间单元上的信道状态，向第二通信装置上报第一CSI。应理解，上述第一指示信息、第一参考信号和第二参考信号可以是分开发送的，也可以是同时发送的，本申请实施例对此不作限定。
作为一个可选的实施例，所述方法还包括：所述第一通信装置向所述第二通信装置发送第二指示信息，所述第二指示信息用于指示所述第一CSI是否可用；
则对应地，所述第二通信装置从所述第一通信装置接收所述第二指示信息。
具体地，第一通信装置还可以向第二通信装置发送第二指示信息，用于指示第一CSI是否可用，该第二通信装置在收到该第二指示信息指示第一CSI不可用时，就可以确定第一通信装置不再根据第一CSI计算第二CSI，或者第二通信装置不再根据第一CSI进行信道预测。进一步地，第一通信装置可以在该第二指示信息中具体指示该第一CSI在某个时刻之后就不可用，本申请实施例对此不作限定。
作为一个可选的实施例，对于周期性CSI上报模式，所述第一CSI是所述第一通信装置在第一上报周期内的上报时刻发送的，所述第二CSI是所述第一通信装置在第二上报周期内的上报时刻发送的，所述第一上报周期大于所述第二上报周期。
具体地，CSI上报分为周期性CSI上报(periodic CSI reporting)和非周期性CSI上报(aperiodic CSI reporting)两种上报模式。在本申请实施例中，上报两类CSI，第一类CSI可以包括RI、第一PMI、第二PMI、第三PMI以及CQI，第二类CSI仅包括CQI，在周期性CSI上报模式下，第一类CSI可以对应一个较长的上报周期(即第一上报周期)，第二类CSI可以对应一个较短的上报周期(即第二上报周期)。
应理解，由于第二类CSI中的CQI是根据第一类CSI中的第二PMI和第三PMI计算的，可以通过协议约定，将在当前的第二类CSI上报周期点之前，与该当前的第二类CSI最接近的第一类CSI上报周期点所上报的信息，作为参考，计算出当前需要上报的第二类CSI，但本申请实施例对此不作限定。
作为一个可选的实施例，所述n 1的取值为协议约定的或所述第二通信装置通过信令为所述第一通信装置配置的；和/或所述n 2的取值为协议约定的或所述第二通信装置通过信令为所述第一通信装置配置的。
图3示出了本申请实施例的上报CSI的方法300的示意性流程图。该方法300可以应用于图1所示的通信***100，但本申请实施例不限于此。
S310，第二通信装置向第一通信装置发送参考信号；对应地，所述第一通信装置从所述第二通信装置接收所述参考信号；
S320，所述第一通信装置根据所述参考信号进行信道测量；
S330，所述第一通信装置在标识为K的时间单元上向所述第二通信装置发送第三信道状态信息CSI，所述第三CSI用于表示第三参考时间单元上的信道状态；其中，所述第三参考时间单元的标识为K+n 3，K为整数，n 3为正整数。
具体地，为了获取信道状态信息CSI，第二通信装置可以向第一通信装置发送参考信号，第一通信装置接收该参考信号并进行信道测量，将获得的第一CSI反馈给第二通信装置。在本申请实施例中，第一通信装置在标识为K的时间单元上向第二通信装置反馈第三CSI，且该第三CSI用于表示标识为K+n 3的第三参考时间单元的信道状态。进一步地，第 二通信装置获取该第三CSI，根据该第三CSI进行后续的数据传输。上述第三CSI上报可以为周期性CSI上报(periodic CSI reporting)，也可以为非周期性CSI上报(aperiodic CSI reporting)。
应理解，第一通信装置反馈CSI对于时延比较敏感，特别是对于移动速度较高的第一通信装置而言，由于CSI反映的是测量时刻的信道状态，若第一通信装置的移动造成信道的变化，第二通信装置接收到的CSI并不能完全反映出当前时刻的信道状态了。在这种情况下，若该第二通信装置直接应用该第一通信装置反馈的CSI，会导致该CSI与当前时刻的信道的匹配度下降，影响数据传输性能。
而在本申请实施例的上报CSI的方法中，第一通信装置可以在标识为K的时间单元上向第二通信装置反馈第三CSI，该第三CSI表示标识为K+n 3的第三参考时间单元的信道状态，以便第二通信装置直接获取到最新的信道状态，有利于提高第二通信装置所应用的CSI与当前时刻的信道的匹配度，进而提高数据传输性能。
应理解，在一种可能的实现方式中，上述参考时间单元可以通过参考资源来表示，参考资源一般可以包括时域资源和频域资源，时域资源即为上述参考时间单元，但本申请实施例对此不作限定。
还应理解，上述第一通信装置可以为终端设备，第二通信装置可以为网络设备，但本申请实施例对此不作限定。在一种具体的实现方式中，上述参考信号为信道状态信息参考信号(channel state indication-reference signal，CSI-RS)。
在上述方法300中，第一通信装置和第二通信装置之间的信令传输可以是直接传输，也可以是间接传输，即通过中继设备进行传输，因此，本申请实施例还可以应用于存在中继设备的应用场景或设备到设备通信(device-to-device，D2D)的应用场景，本申请实施例对此不作限定。
作为一个可选的实施例，在第一通信装置从第二通信装置接收参考信号之前，所述方法还包括：
所述第一通信装置从所述第二通信装置接收第三指示信息，所述第三指示信息用于指示至少两个参考信号的传输；
所述第一通信装置从第二通信装置接收参考信号，包括：
所述第一通信装置根据所述第三指示信息，从所述第二通信装置接收第三参考信号和第四参考信号；
所述方法还包括：所述第一通信装置根据所述第三参考信号和所述第四参考信号，确定所述第三CSI。
在本申请实施例中，第二通信装置的一个触发信令可以触发至少两个参考信号的传输。具体地，第二通信装置可以向第一通信装置发送第三指示信息，用于指示至少两个参考信号的传输，该第二通信装置向第一通信装置发送第三参考信号和第四参考信号，该第一通信装置根据第三参考信号和第四参考信号，获得用于表示该K+n 3的第三参考时间单元的信道状态的第三CSI，并向第二通信装置上报该第三CSI。应理解，上述第三指示信息、第三参考信号和第四参考信号可以是分开发送的，也可以是同时发送的，本申请实施例对此不作限定。
作为一个可选的实施例，所述第一通信装置从第二通信装置接收第四指示信息，所述 第四指示信息用于指示所述至少两个参考信号的时域位置，所述至少两个参考信号中每个参考信号的时域位置不同。
具体而言，第二通信装置可以为第一通信装置发送第四指示信息，用于指示上述至少两个参考信号的时域位置(例如，CSI-RS资源)。在本申请实施例中，对于配置了至少两个参考信号的时域位置的情况，第一通信装置上报的第三CSI中可以包括RI、PMI和CQI，但不会包括参考信号资源指示(CSI-RS resource indicator，CRI)。
应理解，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
上文中结合图1至图3，详细描述了根据本申请实施例的上报CSI的方法，下面将结合图4至图9，详细描述根据本申请实施例的上报CSI的装置。
图4示出了本申请实施例提供的上报CSI的装置400，该装置400包括：
接收单元410，用于从第二通信装置接收参考信号；
发送单元420，用于根据所述参考信号进行信道测量，在标识为m的时间单元上向所述第二通信装置发送第一信道状态信息CSI，所述第一CSI用于表示第一参考时间单元和第二参考时间单元上的信道状态；
其中，所述第一参考时间单元的标识为m-n 1，所述第二参考时间单元的标识为m-n 1-n 2，m、n 1和n 2为整数，且n 2不等于零。
本申请实施例的上报CSI的装置，可以在一次CSI反馈中向第二通信装置反馈至少两个时间单元的信道状态，以便第二通信装置对所要应用的CSI进行预估，有利于提高第二通信装置所应用的CSI与当前时刻的信道的匹配度，进而提高数据传输性能。
可选地，所述第一CSI包括第一预编码矩阵指示PMI、第二PMI和第三PMI；其中，所述第一PMI用于指示所述第一参考时间单元和所述第二参考时间单元对应的矩阵W 1，所述第二PMI用于指示所述第一参考时间单元对应的矩阵
Figure PCTCN2018074837-appb-000349
所述第三PMI用于指示所述第二参考时间单元对应的矩阵
Figure PCTCN2018074837-appb-000350
所述第一参考时间单元对应的预编码矩阵满足
Figure PCTCN2018074837-appb-000351
所述第二参考时间单元对应的预编码矩阵满足
Figure PCTCN2018074837-appb-000352
可选地，所述第三PMI用于指示幅度的相对值Δp x,y,z，所述幅度的相对值Δp x,y,z具体用于表示所述
Figure PCTCN2018074837-appb-000353
中第x×l+z行第y列的幅度系数
Figure PCTCN2018074837-appb-000354
与所述
Figure PCTCN2018074837-appb-000355
中对应位置的幅度系数
Figure PCTCN2018074837-appb-000356
之间的相对值；和/或
所述第三PMI用于指示相位的相对值Δc x,y,z，所述相位的相对值Δc x,y,z具体用于表示所述
Figure PCTCN2018074837-appb-000357
中第x×l+z行第y列的相位系数
Figure PCTCN2018074837-appb-000358
与所述
Figure PCTCN2018074837-appb-000359
中对应位置的相位系数
Figure PCTCN2018074837-appb-000360
之间的相对值；
其中，矩阵
Figure PCTCN2018074837-appb-000361
和
Figure PCTCN2018074837-appb-000362
均为2l行N列的矩阵，l和N均为正整数，x和z表示
Figure PCTCN2018074837-appb-000363
和
Figure PCTCN2018074837-appb-000364
的行号，y表示
Figure PCTCN2018074837-appb-000365
和
Figure PCTCN2018074837-appb-000366
的列号，x∈{0,1}，z∈{1,2,...,l}，y∈{1,2,...,N}。
可选地，
Figure PCTCN2018074837-appb-000367
或
Figure PCTCN2018074837-appb-000368
可选地，若
Figure PCTCN2018074837-appb-000369
则
Figure PCTCN2018074837-appb-000370
或
Figure PCTCN2018074837-appb-000371
其中，j 2＝-1。
可选地，所述装置还包括：第一处理单元，用于根据所述第二PMI和所述第三PMI，确定标识为q的时间单元对应的矩阵
Figure PCTCN2018074837-appb-000372
所述标识为q的时间单元对应的预编码矩阵 满足
Figure PCTCN2018074837-appb-000373
矩阵
Figure PCTCN2018074837-appb-000374
为2l行N′列的矩阵，q为大于m-n 1和m-n 1-n 2的正整数，N′为正整数；根据所述
Figure PCTCN2018074837-appb-000375
确定所述标识为q的时间单元上的第二CQI；所述发送单元420还用于：向所述第二通信装置发送第二CSI，所述第二CSI包括所述第二CQI。
可选地，所述
Figure PCTCN2018074837-appb-000376
是根据所述第二PMI、所述第三PMI以及下列公式，计算出的所述
Figure PCTCN2018074837-appb-000377
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000378
和/或所述
Figure PCTCN2018074837-appb-000379
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000380
确定的，
Figure PCTCN2018074837-appb-000381
Figure PCTCN2018074837-appb-000382
其中，Y表示标识q和第一参考时间单元的标识之差与第一参考时间单元的标识和第二参考时间单元的标识之差的比值，y′∈{1,2,...N′}。
可选地，
Figure PCTCN2018074837-appb-000383
或
Figure PCTCN2018074837-appb-000384
可选地，
Figure PCTCN2018074837-appb-000385
或
Figure PCTCN2018074837-appb-000386
可选地，所述
Figure PCTCN2018074837-appb-000387
是根据所述第二PMI、所述第三PMI以及下列公式，计算出的所述
Figure PCTCN2018074837-appb-000388
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000389
和/或所述
Figure PCTCN2018074837-appb-000390
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000391
确定的，
Figure PCTCN2018074837-appb-000392
Figure PCTCN2018074837-appb-000393
其中，Y表示标识q和第一参考时间单元的标识之差与第一参考时间单元的标识和第二参考时间单元的标识之差的比值，y′∈{1,2,...N′}。
可选地，所述第一CSI包括第四PMI和第五PMI，其中，所述第四PMI用于指示所述第一参考时间单元对应的预编码矩阵W (1)，所述第五PMI用于指示所述第二参考时间单元对应的预编码矩阵W (2)。
可选地，所述第五PMI用于指示系数的相对值Δw r,t，所述系数的相对值Δw r,t具体用于表示所述W (2)中第r行第t列的系数
Figure PCTCN2018074837-appb-000394
与所述W (1)中对应位置的系数
Figure PCTCN2018074837-appb-000395
之间的相对值；其中，矩阵W (1)和W (2)均为N t行N列的矩阵，N t和N均为正整数，r表示W (1)和W (2)的行号，t表示W (1)和W (2)的列号，r∈{1,2,...,N t}，t∈{1,2,...,N}。
可选地，所述装置还包括：第二处理单元，用于根据所述第四PMI和所述第五PMI，确定标识为q的时间单元对应的矩阵
Figure PCTCN2018074837-appb-000396
矩阵
Figure PCTCN2018074837-appb-000397
为N t行N′列的矩阵，q为大于m-n 1和m-n 1-n 2的正整数；根据所述
Figure PCTCN2018074837-appb-000398
确定所述标识为q的时间单元上的第二CQI；所述发送单元420还用于：向所述第二通信装置发送第二CSI，所述第二CSI包括所述第二CQI。
可选地，所述接收单元410还用于：从所述第二通信装置接收配置信息，所述配置信息用于指示所述第二CSI依赖于所述第一CSI；所述处理单元具体用于：所述第一通信装置根据所述配置信息、所述第二PMI和所述第三PMI，确定所述
Figure PCTCN2018074837-appb-000399
可选地，所述接收单元410具体用于：从所述第二通信装置接收第一指示信息，所述第一指示信息用于指示至少两个参考信号的传输；根据所述第一指示信息，从所述第二通信装置接收第一参考信号和第二参考信号，所述第一参考信号用于测量所述第一参考时间 单元的信道状态，所述第二参考信号用于测量所述第二参考时间单元的信道状态。
可选地，所述发送单元420还用于：向所述第二通信装置发送第二指示信息，所述第二指示信息用于指示所述第一CSI是否可用。
可选地，对于周期性CSI上报模式，所述第一CSI是所述第一通信装置在第一上报周期内的上报时刻发送的，所述第二CSI是所述第一通信装置在第二上报周期内的上报时刻发送的，所述第一上报周期大于所述第二上报周期。
可选地，所述n 1的取值为协议约定的或所述第二通信装置通过信令为所述第一通信装置配置的；和/或所述n 2的取值为协议约定的或所述第二通信装置通过信令为所述第一通信装置配置的。
应理解，这里的装置400以功能单元的形式体现。这里的术语“单元”可以指应用特有集成电路(application specific integrated circuit，ASIC)、电子电路、用于执行一个或多个软件或固件程序的处理器(例如共享处理器、专有处理器或组处理器等)和存储器、合并逻辑电路和/或其它支持所描述的功能的合适组件。在一个可选例子中，本领域技术人员可以理解，装置400可以具体为上述实施例200中的第一通信装置，装置400可以用于执行上述方法实施例200中与第一通信装置对应的各个流程和/或步骤，为避免重复，在此不再赘述。
图5示出了本申请实施例提供的另一上报CSI的装置500，该装置500包括：
发送单元510，用于向第一通信装置发送参考信号；
接收单元520，用于接收所述第一通信装置根据所述参考信号，在标识为m的时间单元上发送的第一信道状态信息CSI，所述第一CSI用于表示第一参考时间单元和第二参考时间单元上的信道状态；
其中，所述第一参考时间单元的标识为m-n 1，所述第二参考时间单元的标识为m-n 1-n 2，m、n 1和n 2为整数，且n 2不等于零。
本申请实施例的上报CSI的装置，可以在一次CSI反馈中获取至少两个时间单元的信道状态，以便该装置对所要应用的CSI进行预估，有利于提高该装置所应用的CSI与当前时刻的信道的匹配度，进而提高数据传输性能。
可选地，所述第一CSI包括第一预编码矩阵指示PMI、第二PMI和第三PMI；其中，所述第一PMI用于指示所述第一参考时间单元和所述第二参考时间单元对应的矩阵W 1，所述第二PMI用于指示所述第一参考时间单元对应的矩阵
Figure PCTCN2018074837-appb-000400
所述第三PMI用于指示所述第二参考时间单元对应的矩阵
Figure PCTCN2018074837-appb-000401
所述第一参考时间单元对应的预编码矩阵满足
Figure PCTCN2018074837-appb-000402
所述第二参考时间单元对应的预编码矩阵满足
Figure PCTCN2018074837-appb-000403
可选地，所述第三PMI用于指示幅度的相对值Δp x,y,z，所述幅度的相对值Δp x,y,z具体用于表示所述
Figure PCTCN2018074837-appb-000404
中第x×l+z行第y列的幅度系数
Figure PCTCN2018074837-appb-000405
与所述
Figure PCTCN2018074837-appb-000406
中对应位置的幅度系数
Figure PCTCN2018074837-appb-000407
之间的相对值；和/或
所述第三PMI用于指示相位的相对值Δc x,y,z，所述相位的相对值Δc x,y,z具体用于表示所述
Figure PCTCN2018074837-appb-000408
中第x×l+z行第y列的相位系数
Figure PCTCN2018074837-appb-000409
与所述
Figure PCTCN2018074837-appb-000410
中对应位置的相位系数
Figure PCTCN2018074837-appb-000411
之间的相对值；
其中，矩阵
Figure PCTCN2018074837-appb-000412
和
Figure PCTCN2018074837-appb-000413
均为2l行N列的矩阵，l和N均为正整数，x和z表示
Figure PCTCN2018074837-appb-000414
和
Figure PCTCN2018074837-appb-000415
的行号，y表示
Figure PCTCN2018074837-appb-000416
和
Figure PCTCN2018074837-appb-000417
的列号，x∈{0,1}，z∈{1,2,...,l}，y∈{1,2,...,N}。
可选地，其特征在于，
Figure PCTCN2018074837-appb-000418
或
Figure PCTCN2018074837-appb-000419
可选地，若
Figure PCTCN2018074837-appb-000420
则
Figure PCTCN2018074837-appb-000421
或
Figure PCTCN2018074837-appb-000422
其中，j 2＝-1。
可选地，所述接收单元520还用于：从所述第一通信装置接收第二CSI，所述第二CSI包括第二CQI，所述第二CQI是根据标识为q的时间单元对应的矩阵
Figure PCTCN2018074837-appb-000423
确定的，所述标识为q的时间单元对应的预编码矩阵满足
Figure PCTCN2018074837-appb-000424
矩阵
Figure PCTCN2018074837-appb-000425
为2l行N′列的矩阵，q为大于m-n 1和m-n 1-n 2的正整数，N′为正整数。
可选地，所述
Figure PCTCN2018074837-appb-000426
是根据所述第二PMI、所述第三PMI以及下列公式，计算出的所述
Figure PCTCN2018074837-appb-000427
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000428
和/或所述
Figure PCTCN2018074837-appb-000429
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000430
确定的，
Figure PCTCN2018074837-appb-000431
Figure PCTCN2018074837-appb-000432
其中，Y表示标识q和第一参考时间单元的标识之差与第一参考时间单元的标识和第二参考时间单元的标识之差的比值，y′∈{1,2,...N′}。
可选地，
Figure PCTCN2018074837-appb-000433
或
Figure PCTCN2018074837-appb-000434
可选地，
Figure PCTCN2018074837-appb-000435
或
Figure PCTCN2018074837-appb-000436
可选地，所述
Figure PCTCN2018074837-appb-000437
是根据所述第二PMI、所述第三PMI以及下列公式，计算出的所述
Figure PCTCN2018074837-appb-000438
中第x×l+z行第y′列的幅度系数
Figure PCTCN2018074837-appb-000439
和/或所述
Figure PCTCN2018074837-appb-000440
中第x×l+z行第y′列的相位系数
Figure PCTCN2018074837-appb-000441
确定的，
Figure PCTCN2018074837-appb-000442
Figure PCTCN2018074837-appb-000443
其中，Y表示标识q和第一参考时间单元的标识之差与第一参考时间单元的标识和第二参考时间单元的标识之差的比值，y′∈{1,2,...N′}。
可选地，所述第一CSI包括第四PMI和第五PMI，其中，所述第四PMI用于指示所述第一参考时间单元对应的预编码矩阵W (1)，所述第五PMI用于指示所述第二参考时间单元对应的预编码矩阵W (2)。
可选地，所述第五PMI用于指示系数的相对值Δw r,t，所述系数的相对值Δw r,t具体用于表示所述W (2)中第r行第t列的系数
Figure PCTCN2018074837-appb-000444
与所述W (1)中对应位置的系数
Figure PCTCN2018074837-appb-000445
之间的相对值；其中，矩阵W (1)和W (2)均为N t行N列的矩阵，N t和N均为正整数，r表示W (1)和W (2)的行号，t表示W (1)和W (2)的列号，r∈{1,2,...,N t}，t∈{1,2,...,N}。
可选地，所述发送单元510还用于：向所述第一通信装置发送配置信息，所述配置信息用于指示所述第二CSI依赖于所述第一CSI。
可选地，所述发送单元510具体用于：向所述第一通信装置发送第一指示信息，所述第一指示信息用于指示至少两个参考信号的传输；向所述第一通信装置发送第一参考信号和第二参考信号，所述第一参考信号用于测量所述第一参考时间单元的信道状态，所述第二参考信号用于测量所述第二参考时间单元的信道状态。
可选地，所述接收单元520还用于：从所述第一通信装置接收第二指示信息，所述第二指示信息用于指示所述第一CSI是否可用。
可选地，对于周期性CSI上报模式，所述第一CSI是所述第一通信装置在第一上报周期内的上报时刻发送的，所述第二CSI是所述第一通信装置在第二上报周期内的上报时刻发送的，所述第一上报周期大于所述第二上报周期。
可选地，所述n 1的取值为协议约定的或所述第二通信装置通过信令为所述第一通信装置配置的；和/或所述n 2的取值为协议约定的或所述第二通信装置通过信令为所述第一通信装置配置的。
应理解，这里的装置500以功能单元的形式体现。这里的术语“单元”可以指应用特有集成电路(application specific integrated circuit，ASIC)、电子电路、用于执行一个或多个软件或固件程序的处理器(例如共享处理器、专有处理器或组处理器等)和存储器、合并逻辑电路和/或其它支持所描述的功能的合适组件。在一个可选例子中，本领域技术人员可以理解，装置500可以具体为上述实施例200中的第二通信装置，装置500可以用于执行上述方法实施例200中与第二通信装置对应的各个流程和/或步骤，为避免重复，在此不再赘述。
图6示出了本申请实施例提供的另一上报CSI的装置600，该装置600包括：
接收单元610，用于从第二通信装置接收参考信号；
发送单元620，用于根据所述参考信号进行信道测量，在标识为K的时间单元上向所述第二通信装置发送第三信道状态信息CSI，所述第三CSI用于表示第三参考时间单元上的信道状态；
其中，所述第三参考时间单元的标识为K+n 3，K和n 3均为正整数。
本申请实施例的上报CSI的装置，可以在标识为K的时间单元上向第二通信装置反馈第三CSI，该第三CSI表示标识为K+n 3的第三参考时间单元的信道状态，以便第二通信装置直接获取到最新的信道状态，有利于提高第二通信装置所应用的CSI与当前时刻的信道的匹配度，进而提高数据传输性能。
可选地，所述接收单元610具体用于：从所述第二通信装置接收第三指示信息，所述第三指示信息用于指示至少两个参考信号的传输；根据所述第三指示信息，从所述第二通信装置接收第一参考信号和第二参考信号；所述装置还包括：处理单元，用于根据所述第一参考信号和所述第二参考信号，确定所述第三CSI。
可选地，所述接收单元610还用于：接收第四指示信息，所述第四指示信息用于指示所述至少两个参考信号的时域位置，所述至少两个参考信号中每个参考信号的时域位置不同。
应理解，这里的装置600以功能单元的形式体现。这里的术语“单元”可以指应用特有集成电路(application specific integrated circuit，ASIC)、电子电路、用于执行一个或多个软件或固件程序的处理器(例如共享处理器、专有处理器或组处理器等)和存储器、合并逻辑电路和/或其它支持所描述的功能的合适组件。在一个可选例子中，本领域技术人员可以理解，装置600可以具体为上述实施例300中的第一通信装置，装置600可以用于执行上述方法实施例300中与第一通信装置对应的各个流程和/或步骤，为避免重复，在此不再赘述。
图7示出了本申请实施例提供的另一上报CSI的装置700。该装置700包括处理器710、收发器720和存储器730。其中，处理器710、收发器720和存储器730通过内部连接通路互相通信，该存储器730用于存储指令，该处理器710用于执行该存储器730存储的指令，以控制该收发器720发送信号和/或接收信号。
其中，该处理器710用于通过该收发器720从第二通信装置接收参考信号；根据所述参考信号进行信道测量，在标识为m的时间单元上向所述第二通信装置发送第一信道状态信息CSI，所述第一CSI用于表示第一参考时间单元和第二参考时间单元上的信道状态；其中，所述第一参考时间单元的标识为m-n 1，所述第二参考时间单元的标识为m-n 1-n 2，m、n 1和n 2为整数，且n 2不等于零。
应理解，装置700可以具体为上述实施例200中的第一通信装置，并且可以用于执行上述方法实施例200中与第一通信装置对应的各个步骤和/或流程。可选地，该存储器730可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该处理器710可以用于执行存储器中存储的指令，并且当该处理器710执行存储器中存储的指令时，该处理器710用于执行上述与该第一通信装置对应的方法实施例的各个步骤和/或流程。
图8示出了本申请实施例提供的另一上报CSI的装置800。该装置800包括处理器810、收发器820和存储器830。其中，处理器810、收发器820和存储器830通过内部连接通路互相通信，该存储器830用于存储指令，该处理器810用于执行该存储器830存储的指令，以控制该收发器820发送信号和/或接收信号。
其中，该处理器810用于通过该收发器820向第一通信装置发送参考信号；接收所述第一通信装置根据所述参考信号，在标识为m的时间单元上发送的第一信道状态信息CSI，所述第一CSI用于表示第一参考时间单元和第二参考时间单元上的信道状态；其中，所述第一参考时间单元的标识为m-n 1，所述第二参考时间单元的标识为m-n 1-n 2，m、n 1和n 2为整数。
应理解，装置800可以具体为上述实施例200中的第二通信装置，并且可以用于执行上述方法实施例200中第二通信装置对应的各个步骤和/或流程。可选地，该存储器830可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该处理器810可以用于执行存储器中存储的指令，并且当该处理器810执行存储器中存储的指令时，该处理器610用于执行上述与该第二通信装置对应的方法实施例的各个步骤和/或流程。
图9示出了本申请实施例提供的另一上报CSI的装置900。该装置900包括处理器910、收发器920和存储器930。其中，处理器910、收发器920和存储器930通过内部连接通路互相通信，该存储器930用于存储指令，该处理器910用于执行该存储器930存储的指令，以控制该收发器920发送信号和/或接收信号。
其中，该处理器910用于通过该收发器920从第二通信装置接收参考信号；根据所述参考信号进行信道测量，在标识为K的时间单元上向所述第二通信装置发送第三信道状态信息CSI，所述第三CSI用于表示第三参考时间单元上的信道状态；其中，所述第三参考时间单元的标识为K+n 3，K为整数，n 3为正整数，且n 2不等于零。
应理解，装置900可以具体为上述实施例300中的第一通信装置，并且可以用于执行 上述方法实施例300中与第一通信装置对应的各个步骤和/或流程。可选地，该存储器930可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。该处理器910可以用于执行存储器中存储的指令，并且当该处理器910执行存储器中存储的指令时，该处理器910用于执行上述与该第一通信装置对应的方法实施例的各个步骤和/或流程。
应理解，在本申请实施例中，上述装置的处理器可以是中央处理单元(central processing unit，CPU)，该处理器还可以是其他通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
在实现过程中，上述方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件单元组合执行完成。软件单元可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器执行存储器中的指令，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
本领域普通技术人员可以意识到，结合本文中所公开的实施例中描述的各方法步骤和单元，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各实施例的步骤及组成。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。本领域普通技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的***、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的***、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，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***，或一些特征可以忽略，或不执行。另外，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，也可以是电的，机械的或其它的形式连接。
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单元来实现本申请实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以是两个或两个以上单元集成在一个单元中。上述集成的单元 既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分，或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到各种等效的修改或替换，这些修改或替换都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (33)

  1. 一种上报信道状态信息CSI的方法，其特征在于，包括：
    第一通信装置从第二通信装置接收参考信号；
    所述第一通信装置根据所述参考信号进行信道测量，在标识为m的时间单元上向所述第二通信装置发送第一CSI，所述第一CSI用于表示第一参考时间单元和第二参考时间单元上的信道状态；
    其中，所述第一参考时间单元的标识为m-n 1，所述第二参考时间单元的标识为m-n 1-n 2，m、n 1和n 2为整数，且n 2不等于零。
  2. 如权利要求1所述的方法，其特征在于，所述第一CSI包括第一预编码矩阵指示PMI、第二PMI和第三PMI；
    其中，所述第一PMI用于指示所述第一参考时间单元和所述第二参考时间单元对应的矩阵W 1，所述第二PMI用于指示所述第一参考时间单元对应的矩阵
    Figure PCTCN2018074837-appb-100001
    所述第三PMI用于指示所述第二参考时间单元对应的矩阵
    Figure PCTCN2018074837-appb-100002
    所述第一参考时间单元对应的预编码矩阵满足
    Figure PCTCN2018074837-appb-100003
    所述第二参考时间单元对应的预编码矩阵满足
    Figure PCTCN2018074837-appb-100004
  3. 如权利要求2所述的方法，其特征在于，所述第三PMI用于指示幅度的相对值Δp x,y,z，所述幅度的相对值Δp x,y,z具体用于表示所述
    Figure PCTCN2018074837-appb-100005
    中第x×l+z行第y列的幅度系数
    Figure PCTCN2018074837-appb-100006
    与所述
    Figure PCTCN2018074837-appb-100007
    中对应位置的幅度系数
    Figure PCTCN2018074837-appb-100008
    之间的相对值；和/或
    所述第三PMI用于指示相位的相对值Δc x,y,z，所述相位的相对值Δc x,y,z具体用于表示所述
    Figure PCTCN2018074837-appb-100009
    中第x×l+z行第y列的相位系数
    Figure PCTCN2018074837-appb-100010
    与所述
    Figure PCTCN2018074837-appb-100011
    中对应位置的相位系数
    Figure PCTCN2018074837-appb-100012
    之间的相对值；
    其中，矩阵
    Figure PCTCN2018074837-appb-100013
    和
    Figure PCTCN2018074837-appb-100014
    均为2l行N列的矩阵，l和N均为正整数，x和z表示
    Figure PCTCN2018074837-appb-100015
    和
    Figure PCTCN2018074837-appb-100016
    的行号，y表示
    Figure PCTCN2018074837-appb-100017
    和
    Figure PCTCN2018074837-appb-100018
    的列号，x∈{0,1}，z∈{1,2,…,l}，y∈{1,2,…,N}。
  4. 如权利要求2或3所述的方法，其特征在于，所述方法还包括：
    所述第一通信装置根据所述第二PMI和所述第三PMI，确定标识为q的时间单元对应的矩阵
    Figure PCTCN2018074837-appb-100019
    所述标识为q的时间单元对应的预编码矩阵满足
    Figure PCTCN2018074837-appb-100020
    矩阵
    Figure PCTCN2018074837-appb-100021
    为2l行N′列的矩阵，q为大于m-n 1和m-n 1-n 2的正整数，N′为正整数；
    所述第一通信装置根据所述
    Figure PCTCN2018074837-appb-100022
    确定所述标识为q的时间单元上的第二CQI；
    所述第一通信装置向所述第二通信装置发送第二CSI，所述第二CSI包括所述第二CQI。
  5. 如权利要求4所述的方法，其特征在于，所述方法还包括：
    所述第一通信装置从所述第二通信装置接收配置信息，所述配置信息用于指示所述第二CSI依赖于所述第一CSI；
    所述第一通信装置根据所述第二PMI和所述第三PMI，确定标识为q的时间单元对应的矩阵
    Figure PCTCN2018074837-appb-100023
    包括：
    所述第一通信装置根据所述配置信息、所述第二PMI和所述第三PMI，确定所述
    Figure PCTCN2018074837-appb-100024
  6. 如权利要求1至5中任一项所述的方法，其特征在于，在第一通信装置从第二通信装置接收参考信号之前，所述方法还包括：
    所述第一通信装置从所述第二通信装置接收第一指示信息，所述第一指示信息用于指示至少两个参考信号的传输；
    所述第一通信装置从第二通信装置接收参考信号，包括：
    所述第一通信装置根据所述第一指示信息，从所述第二通信装置接收第一参考信号和第二参考信号，所述第一参考信号用于测量所述第一参考时间单元的信道状态，所述第二参考信号用于测量所述第二参考时间单元的信道状态。
  7. 如权利要求1至6中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一通信装置向所述第二通信装置发送第二指示信息，所述第二指示信息用于指示所述第一CSI是否可用。
  8. 一种上报信道状态信息CSI的方法，其特征在于，包括：
    第二通信装置向第一通信装置发送参考信号；
    所述第二通信装置接收所述第一通信装置根据所述参考信号，在标识为m的时间单元上发送的第一CSI，所述第一CSI用于表示第一参考时间单元和第二参考时间单元上的信道状态；
    其中，所述第一参考时间单元的标识为m-n 1，所述第二参考时间单元的标识为m-n 1-n 2，m、n 1和n 2为整数，且n 2不等于零。
  9. 如权利要求8所述的方法，其特征在于，所述第一CSI包括第一预编码矩阵指示PMI、第二PMI和第三PMI；
    其中，所述第一PMI用于指示所述第一参考时间单元和所述第二参考时间单元对应的矩阵W 1，所述第二PMI用于指示所述第一参考时间单元对应的矩阵
    Figure PCTCN2018074837-appb-100025
    所述第三PMI用于指示所述第二参考时间单元对应的矩阵
    Figure PCTCN2018074837-appb-100026
    所述第一参考时间单元对应的预编码矩阵满足
    Figure PCTCN2018074837-appb-100027
    所述第二参考时间单元对应的预编码矩阵满足
    Figure PCTCN2018074837-appb-100028
  10. 如权利要求9所述的方法，其特征在于，所述第三PMI用于指示幅度的相对值Δp x,y,z，所述幅度的相对值Δp x,y,z具体用于表示所述
    Figure PCTCN2018074837-appb-100029
    中第x×l+z行第y列的幅度系数
    Figure PCTCN2018074837-appb-100030
    与所述
    Figure PCTCN2018074837-appb-100031
    中对应位置的幅度系数
    Figure PCTCN2018074837-appb-100032
    之间的相对值；和/或
    所述第三PMI用于指示相位的相对值Δc x,y,z，所述相位的相对值Δc x,y,z具体用于表示所述
    Figure PCTCN2018074837-appb-100033
    中第x×l+z行第y列的相位系数
    Figure PCTCN2018074837-appb-100034
    与所述
    Figure PCTCN2018074837-appb-100035
    中对应位置的相位系数
    Figure PCTCN2018074837-appb-100036
    之间的相对值；
    其中，矩阵
    Figure PCTCN2018074837-appb-100037
    和
    Figure PCTCN2018074837-appb-100038
    均为2l行N列的矩阵，l和N均为正整数，x和z表示
    Figure PCTCN2018074837-appb-100039
    和
    Figure PCTCN2018074837-appb-100040
    的行号，y表示
    Figure PCTCN2018074837-appb-100041
    和
    Figure PCTCN2018074837-appb-100042
    的列号，x∈{0,1}，z∈{1,2,…,l}，y∈{1,2,…,N}。
  11. 如权利要求9或10所述的方法，其特征在于，所述方法还包括：
    所述第二通信装置从所述第一通信装置接收第二CSI，所述第二CSI包括第二CQI，所述第二CQI是根据标识为q的时间单元对应的矩阵
    Figure PCTCN2018074837-appb-100043
    确定的，所述标识为q的时间单元对应的预编码矩阵满足
    Figure PCTCN2018074837-appb-100044
    矩阵
    Figure PCTCN2018074837-appb-100045
    为2l行N′列的矩阵，q为大于m-n 1和m-n 1-n 2的正整数，N′为正整数。
  12. 如权利要求11所述的方法，其特征在于，所述方法还包括：
    所述第二通信装置向所述第一通信装置发送配置信息，所述配置信息用于指示所述第二CSI依赖于所述第一CSI。
  13. 如权利要求8至12中任一项所述的方法，其特征在于，在所述第二通信装置向 第一通信装置发送参考信号之前，所述方法还包括：
    所述第二通信装置向所述第一通信装置发送第一指示信息，所述第一指示信息用于指示至少两个参考信号的传输；
    所述第二通信装置向第一通信装置发送参考信号，包括：
    所述第二通信装置向所述第一通信装置发送第一参考信号和第二参考信号，所述第一参考信号用于测量所述第一参考时间单元的信道状态，所述第二参考信号用于测量所述第二参考时间单元的信道状态。
  14. 如权利要求8至13中任一项所述的方法，其特征在于，所述方法还包括：
    所述第二通信装置从所述第一通信装置接收第二指示信息，所述第二指示信息用于指示所述第一CSI是否可用。
  15. 一种上报信道状态信息CSI的方法，其特征在于，包括：
    第一通信装置从第二通信装置接收参考信号；
    所述第一通信装置根据所述参考信号进行信道测量，在标识为K的时间单元上向所述第二通信装置发送第三CSI，所述第三CSI用于表示第三参考时间单元上的信道状态；
    其中，所述第三参考时间单元的标识为K+n 3，K为整数，n 3为正整数。
  16. 如权利要求15所述的方法，其特征在于，在第一通信装置从第二通信装置接收参考信号之前，所述方法还包括：
    所述第一通信装置从所述第二通信装置接收第三指示信息，所述第三指示信息用于指示至少两个参考信号的传输；
    所述第一通信装置从第二通信装置接收参考信号，包括：
    所述第一通信装置根据所述第三指示信息，从所述第二通信装置接收第一参考信号和第二参考信号；
    所述方法还包括：
    所述第一通信装置根据所述第一参考信号和所述第二参考信号，确定所述第三CSI。
  17. 一种上报信道状态信息CSI的装置，其特征在于，包括：
    接收单元，用于从第二通信装置接收参考信号；
    发送单元，用于根据所述参考信号进行信道测量，在标识为m的时间单元上向所述第二通信装置发送第一CSI，所述第一CSI用于表示第一参考时间单元和第二参考时间单元上的信道状态；
    其中，所述第一参考时间单元的标识为m-n 1，所述第二参考时间单元的标识为m-n 1-n 2，m、n 1和n 2为整数，且n 2不等于零。
  18. 如权利要求17所述的装置，其特征在于，所述第一CSI包括第一预编码矩阵指示PMI、第二PMI和第三PMI；
    其中，所述第一PMI用于指示所述第一参考时间单元和所述第二参考时间单元对应的矩阵W 1，所述第二PMI用于指示所述第一参考时间单元对应的矩阵
    Figure PCTCN2018074837-appb-100046
    所述第三PMI用于指示所述第二参考时间单元对应的矩阵
    Figure PCTCN2018074837-appb-100047
    所述第一参考时间单元对应的预编码矩阵满足
    Figure PCTCN2018074837-appb-100048
    所述第二参考时间单元对应的预编码矩阵满足
    Figure PCTCN2018074837-appb-100049
  19. 如权利要求18所述的装置，其特征在于，所述第三PMI用于指示幅度的相对值Δp x,y,z，所述幅度的相对值Δp x,y,z具体用于表示所述
    Figure PCTCN2018074837-appb-100050
    中第x×l+z行第y列的幅度系 数
    Figure PCTCN2018074837-appb-100051
    与所述
    Figure PCTCN2018074837-appb-100052
    中对应位置的幅度系数
    Figure PCTCN2018074837-appb-100053
    之间的相对值；和/或
    所述第三PMI用于指示相位的相对值Δc x,y,z，所述相位的相对值Δc x,y,z具体用于表示所述
    Figure PCTCN2018074837-appb-100054
    中第x×l+z行第y列的相位系数
    Figure PCTCN2018074837-appb-100055
    与所述
    Figure PCTCN2018074837-appb-100056
    中对应位置的相位系数
    Figure PCTCN2018074837-appb-100057
    之间的相对值；
    其中，矩阵
    Figure PCTCN2018074837-appb-100058
    和
    Figure PCTCN2018074837-appb-100059
    均为2l行N列的矩阵，l和N均为正整数，x和z表示
    Figure PCTCN2018074837-appb-100060
    和
    Figure PCTCN2018074837-appb-100061
    的行号，y表示
    Figure PCTCN2018074837-appb-100062
    和
    Figure PCTCN2018074837-appb-100063
    的列号，x∈{0,1}，z∈{1,2,…,l}，y∈{1,2,…,N}。
  20. 如权利要求18或19所述的装置，其特征在于，所述装置还包括：
    处理单元，用于根据所述第二PMI和所述第三PMI，确定标识为q的时间单元对应的矩阵
    Figure PCTCN2018074837-appb-100064
    所述标识为q的时间单元对应的预编码矩阵满足
    Figure PCTCN2018074837-appb-100065
    矩阵
    Figure PCTCN2018074837-appb-100066
    为2l行N′列的矩阵，q为大于m-n 1和m-n 1-n 2的正整数，N′为正整数；
    根据所述
    Figure PCTCN2018074837-appb-100067
    确定所述标识为q的时间单元上的第二CQI；
    所述发送单元还用于：
    向所述第二通信装置发送第二CSI，所述第二CSI包括所述第二CQI。
  21. 如权利要求20所述的装置，其特征在于，所述接收单元还用于：
    从所述第二通信装置接收配置信息，所述配置信息用于指示所述第二CSI依赖于所述第一CSI；
    所述处理单元具体用于：
    所述第一通信装置根据所述配置信息、所述第二PMI和所述第三PMI，确定所述
    Figure PCTCN2018074837-appb-100068
  22. 如权利要求17至21中任一项所述的装置，其特征在于，所述接收单元具体用于：
    从所述第二通信装置接收第一指示信息，所述第一指示信息用于指示至少两个参考信号的传输；
    根据所述第一指示信息，从所述第二通信装置接收第一参考信号和第二参考信号，所述第一参考信号用于测量所述第一参考时间单元的信道状态，所述第二参考信号用于测量所述第二参考时间单元的信道状态。
  23. 如权利要求17至22中任一项所述的装置，其特征在于，所述发送单元还用于：
    向所述第二通信装置发送第二指示信息，所述第二指示信息用于指示所述第一CSI是否可用。
  24. 一种上报信道状态信息CSI的装置，其特征在于，包括：
    发送单元，用于向第一通信装置发送参考信号；
    接收单元，用于接收所述第一通信装置根据所述参考信号，在标识为m的时间单元上发送的第一CSI，所述第一CSI用于表示第一参考时间单元和第二参考时间单元上的信道状态；
    其中，所述第一参考时间单元的标识为m-n 1，所述第二参考时间单元的标识为m-n 1-n 2，m、n 1和n 2为整数，且n 2不等于零。
  25. 如权利要求24所述的装置，其特征在于，所述第一CSI包括第一预编码矩阵指示PMI、第二PMI和第三PMI；
    其中，所述第一PMI用于指示所述第一参考时间单元和所述第二参考时间单元对应的矩阵W 1，所述第二PMI用于指示所述第一参考时间单元对应的矩阵
    Figure PCTCN2018074837-appb-100069
    所述第三PMI用于指示所述第二参考时间单元对应的矩阵
    Figure PCTCN2018074837-appb-100070
    所述第一参考时间单元对应的预编码矩 阵满足
    Figure PCTCN2018074837-appb-100071
    所述第二参考时间单元对应的预编码矩阵满足
    Figure PCTCN2018074837-appb-100072
  26. 如权利要求25所述的装置，其特征在于，所述第三PMI用于指示幅度的相对值Δp x,y,z，所述幅度的相对值Δp x,y,z具体用于表示所述
    Figure PCTCN2018074837-appb-100073
    中第x×l+z行第y列的幅度系数
    Figure PCTCN2018074837-appb-100074
    与所述
    Figure PCTCN2018074837-appb-100075
    中对应位置的幅度系数
    Figure PCTCN2018074837-appb-100076
    之间的相对值；和/或
    所述第三PMI用于指示相位的相对值Δc x,y,z，所述相位的相对值Δc x,y,z具体用于表示所述
    Figure PCTCN2018074837-appb-100077
    中第x×l+z行第y列的相位系数
    Figure PCTCN2018074837-appb-100078
    与所述
    Figure PCTCN2018074837-appb-100079
    中对应位置的相位系数
    Figure PCTCN2018074837-appb-100080
    之间的相对值；
    其中，矩阵
    Figure PCTCN2018074837-appb-100081
    和 均为2l行N列的矩阵，l和N均为正整数，x和z表示
    Figure PCTCN2018074837-appb-100083
    和
    Figure PCTCN2018074837-appb-100084
    的行号，y表示
    Figure PCTCN2018074837-appb-100085
    和
    Figure PCTCN2018074837-appb-100086
    的列号，x∈{0,1}，z∈{1,2,…,l}，y∈{1,2,…,N}。
  27. 如权利要求25或26所述的装置，其特征在于，所述接收单元还用于：
    从所述第一通信装置接收第二CSI，所述第二CSI包括第二CQI，所述第二CQI是根据标识为q的时间单元对应的矩阵
    Figure PCTCN2018074837-appb-100087
    确定的，所述标识为q的时间单元对应的预编码矩阵满足
    Figure PCTCN2018074837-appb-100088
    矩阵
    Figure PCTCN2018074837-appb-100089
    为2l行N′列的矩阵，q为大于m-n 1和m-n 1-n 2的正整数，N′为正整数。
  28. 如权利要求27所述的装置，其特征在于，所述发送单元还用于：
    向所述第一通信装置发送配置信息，所述配置信息用于指示所述第二CSI依赖于所述第一CSI。
  29. 如权利要求24至28中任一项所述的装置，其特征在于，所述发送单元具体用于：
    向所述第一通信装置发送第一指示信息，所述第一指示信息用于指示至少两个参考信号的传输；
    向所述第一通信装置发送第一参考信号和第二参考信号，所述第一参考信号用于测量所述第一参考时间单元的信道状态，所述第二参考信号用于测量所述第二参考时间单元的信道状态。
  30. 如权利要求24至29中任一项所述的装置，其特征在于，所述接收单元还用于：
    从所述第一通信装置接收第二指示信息，所述第二指示信息用于指示所述第一CSI是否可用。
  31. 一种上报信道状态信息CSI的装置，其特征在于，包括：
    接收单元，用于从第二通信装置接收参考信号；
    发送单元，用于根据所述参考信号进行信道测量，在标识为K的时间单元上向所述第二通信装置发送第三CSI，所述第三CSI用于表示第三参考时间单元上的信道状态；
    其中，所述第三参考时间单元的标识为K+n 3，K为整数，n 3为正整数。
  32. 如权利要求31所述的装置，其特征在于，所述接收单元具体用于：
    从所述第二通信装置接收第三指示信息，所述第三指示信息用于指示至少两个参考信号的传输；
    根据所述第三指示信息，从所述第二通信装置接收第一参考信号和第二参考信号；
    所述装置还包括：
    处理单元，用于根据所述第一参考信号和所述第二参考信号，确定所述第三CSI。
  33. 一种计算机可读介质，用于存储计算机程序，其特征在于，所述计算机程序包括用于实现上述权利要求1至权利要求16中任一项所述的方法的指令。
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