WO2018202154A1 - 传输预编码矩阵的指示方法和设备 - Google Patents

传输预编码矩阵的指示方法和设备 Download PDF

Info

Publication number
WO2018202154A1
WO2018202154A1 PCT/CN2018/085681 CN2018085681W WO2018202154A1 WO 2018202154 A1 WO2018202154 A1 WO 2018202154A1 CN 2018085681 W CN2018085681 W CN 2018085681W WO 2018202154 A1 WO2018202154 A1 WO 2018202154A1
Authority
WO
WIPO (PCT)
Prior art keywords
precoding matrix
transmission precoding
subband
indication field
bits
Prior art date
Application number
PCT/CN2018/085681
Other languages
English (en)
French (fr)
Inventor
任海豹
黄逸
李元杰
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21203625.5A priority Critical patent/EP4037196A1/en
Priority to EP18794205.7A priority patent/EP3637631B1/en
Publication of WO2018202154A1 publication Critical patent/WO2018202154A1/zh
Priority to US16/673,432 priority patent/US11206064B2/en
Priority to US17/529,575 priority patent/US11757497B2/en
Priority to US18/228,195 priority patent/US12119902B2/en

Links

Images

Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0478—Special codebook structures directed to feedback optimisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present application relates to communication technologies, and in particular, to an indication method and apparatus for transmitting a precoding matrix.
  • MIMO Multiple Input Multiple Output
  • NR Radio Access Technology
  • LTE Long Term Evolution
  • the terminal device needs to use the uplink transmission precoding matrix to perform data to be transmitted. Pre-processing to obtain beamforming gain and reduce interference between different data streams of the same terminal device, thereby improving system performance. It can be seen that how to perform the indication of the uplink transmission precoding matrix is an important technique in the NR.
  • the present application provides an indication method and device for transmitting a precoding matrix, in order to provide an indication of an uplink transmission precoding matrix adapted to an NR scenario, such as an indication of an uplink transmission precoding matrix in a frequency selective scheduling scenario, or The indication manner of the uplink transmission precoding matrix that reduces the signaling overhead.
  • an indication method for transmitting a precoding matrix including:
  • the downlink control information includes: a resource allocation information indication field, a transmission layer number indication field, and a transmission precoding matrix indication field corresponding to at least one subband, where the resource allocation information indication domain is used a resource indicating an uplink scheduling, where the resource corresponds to at least one sub-band, the number of transmission layer indication fields is used to indicate an uplink transmission layer, and the transmission precoding matrix indication field corresponding to the sub-band is used to indicate that the sub-band corresponds to Uplink transmission precoding matrix;
  • the number of bits of the transmission precoding matrix indication field corresponding to the subband satisfies the following formula:
  • N min ⁇ floor(N ⁇ /N s ),N max ⁇
  • N represents the number of bits of the transmission precoding matrix indication field corresponding to the subband
  • floor() represents a downward rounding function
  • N ⁇ represents a preset total number of bits of the transmission precoding matrix indication field
  • N s Representing the number of the at least one subband and N max representing a preset maximum number of bits of the transmission precoding matrix indication field, the number of the at least one subband being a positive integer not less than one.
  • the number of bits of the transmission precoding matrix indication field corresponding to the subband is equal to: a target of the transmission precoding matrix indication domain corresponding to the number of the at least one subband in the preset information. a preset number of bits, wherein the preset information includes: a correspondence between a preset number of subbands and a preset number of bits of a transmission precoding matrix indication field corresponding to the preset number of subbands,
  • the number of at least one sub-band is a positive integer not less than one.
  • the transmission precoding matrix indication field corresponding to the subband is used to indicate an initial index of an uplink transmission precoding matrix corresponding to the subband, and the transmission preamble corresponding to the subband
  • the number of bits of the coding matrix indication field and the number of the uplink transmission layer, and determining an uplink transmission precoding matrix corresponding to the subband including:
  • the correspondence between the initial index and the target index satisfies the following formula or the following formula corresponding to the formula:
  • k represents an index adjustment coefficient
  • ⁇ represents an index offset coefficient
  • I dx represents the target index
  • k is a preset value or a value configured by the network device
  • ⁇ is a preset The value or the value of the network device configuration.
  • the transmission precoding matrix indication field corresponding to the subband is used to indicate an index of an uplink transmission precoding matrix corresponding to the subband, and the transmission precoding according to the subband is performed.
  • the number of bits of the matrix indication field and the number of the uplink transmission layers, and the uplink transmission precoding matrix corresponding to the subband including:
  • the uplink transmission precoding matrix corresponding to the subband is determined.
  • the uplink transmission precoding matrix corresponding to the subband may belong to the codebook in the foregoing part of the embodiment; if the transmission precoding matrix indication domain corresponding to the subband is adopted.
  • the second possible implementation manner of determining the uplink transmission precoding matrix corresponding to the subband by the number of bits and the number of the uplink transmission layers, and the uplink transmission precoding matrix corresponding to the subband may belong to the foregoing embodiment. In the target codebook in the section.
  • the uplink transmission precoding matrix corresponding to the subband includes: at least one non-zero element, and a modulus value of the non-zero element is different from a modulus value of other non-zero elements in the uplink transmission precoding matrix, That is, the uplink transmission precoding matrix corresponding to the subband is a non-constant modulus precoding matrix.
  • the non-zero and non-zero element of the uplink transmission precoding matrix in the codebook or the target codebook is
  • ⁇ m,n represents the amplitude coefficient of the mth row and the nth column element in the uplink transmission precoding matrix, 0 ⁇
  • the m is a positive integer less than or equal to the number of antenna ports
  • the n is a positive integer less than or equal to the number of uplink transmission layers.
  • ⁇ m,n may also be equal to 0 or 1 (ie, the zero element or the 1 element in the codebook may also be expressed as ).
  • the number of the uplink transmission layer is equal to 1, and the resource allocation information indication field is used to indicate at least two sub-bands of the uplink scheduling, and the uplink transmission precoding matrix corresponding to the at least two sub-bands a sum of squares of modulus values corresponding to all elements in the Kth row, and a sum of squares of modulus values corresponding to all elements in the Lth row of the uplink transmission precoding matrix corresponding to the at least two subbands, the K sum
  • the L is a positive integer less than or equal to the number of antenna ports, and the K is not equal to the L.
  • the number of uplink transmission layers is greater than 1, and the sum of squares of modulus values corresponding to all elements in the Kth row of the uplink transmission precoding matrix corresponding to the at least one subband, And a sum of squares of modulus values corresponding to all elements in the Lth row of the uplink transmission precoding matrix corresponding to the at least one subband is equal, and the K and the L are both positive integers less than or equal to the number of antenna ports, and the K is not equal to the L.
  • the method further includes:
  • Receiving coefficient indication information from the network device if the coefficient indication information is used to indicate an element in an uplink transmission precoding matrix in the codebook Said ⁇ m,n and/or said Determining, according to the coefficient indication information, the codebook; if the coefficient indication information is used to indicate an element in an uplink transmission precoding matrix in the target codebook Said ⁇ m,n and/or said And determining the target codebook according to the coefficient indication information.
  • the coefficient indication information includes: M-bit first coefficient indication information and/or N-bit second coefficient indication information; wherein the first coefficient indication information is used to indicate the ⁇ m,n , the second coefficient indication information is used to indicate the Both M and N are positive integers greater than zero.
  • the embodiment of the present application provides an indication method for transmitting a precoding matrix, including:
  • the terminal device Determining, by the terminal device, the uplink scheduling resource and the number of bits of the transmission precoding matrix indication field corresponding to the at least one subband; wherein the resource corresponds to at least one subband, and the transmission precoding matrix corresponding to the subband indicates the number of bits of the domain Not exceeding a preset total number of bits of the transmission precoding matrix indication field; the sum of the number of bits of the transmission precoding matrix indication field corresponding to each of the subbands is not greater than the preset total number of bits, and the transmission corresponding to the subband
  • the number of bits of the precoding matrix indication field is related to the number of subbands corresponding to the uplink scheduled resource;
  • the downlink control information includes: a resource allocation information indication field, a transmission layer number indication field, and a transmission precoding matrix indication field corresponding to the at least one subband, where the resource allocation information indicates a domain
  • the resource for indicating uplink scheduling, the number of transmission layer indication fields is used to indicate the number of uplink transmission layers, and the transmission precoding matrix indication field corresponding to the subband is used to indicate uplink transmission precoding corresponding to the subband matrix.
  • the number of bits of the transmission precoding matrix indication field corresponding to the subband satisfies the following formula:
  • N min ⁇ floor(N ⁇ /N s ),N max ⁇
  • N represents the number of bits of the transmission precoding matrix indication field corresponding to the subband
  • floor() represents a downward rounding function
  • N ⁇ represents a preset total number of bits of the transmission precoding matrix indication field
  • N s Representing the number of the at least one subband and N max representing a preset maximum number of bits of the transmission precoding matrix indication field, the number of the at least one subband being a positive integer not less than one.
  • the number of bits of the transmission precoding matrix indication field corresponding to the subband is equal to: a target of the transmission precoding matrix indication domain corresponding to the number of the at least one subband in the preset information. a preset number of bits, wherein the preset information includes: a correspondence between a preset number of subbands and a preset number of bits of a transmission precoding matrix indication field corresponding to the preset number of subbands,
  • the number of at least one sub-band is a positive integer not less than one.
  • the transmission precoding matrix indication field corresponding to the subband is used to indicate an initial index of an uplink transmission precoding matrix corresponding to the subband, where the initial index corresponds to the subband Corresponding relationship between the target indexes of the transmission precoding matrix;
  • the transmission precoding matrix indication field corresponding to the subband is used to indicate an index of an uplink transmission precoding matrix corresponding to the subband, and the index is used to indicate a transmission precoding matrix corresponding to the subband in a target codebook. And indicating an uplink transmission precoding matrix corresponding to the index indicated by the domain, where the target codebook matches the number of bits of the transmission precoding matrix indication field corresponding to the subband and the number of the uplink transmission layer.
  • the uplink transmission precoding matrix corresponding to the subband may belong to the codebook or the target codebook.
  • the uplink transmission precoding matrix corresponding to the subband includes: at least one non-zero element, and a modulus value of the non-zero element is different from a modulus value of other non-zero elements in the uplink transmission precoding matrix, That is, the uplink transmission precoding matrix corresponding to the subband is a non-constant modulus precoding matrix.
  • the non-zero and non-zero element of the uplink transmission precoding matrix in the codebook or the target codebook is
  • ⁇ m,n represents the amplitude coefficient of the mth row and the nth column element in the uplink transmission precoding matrix, 0 ⁇
  • the m is a positive integer less than or equal to the number of antenna ports
  • the n is a positive integer less than or equal to the number of uplink transmission layers.
  • ⁇ m,n may also be equal to 0 or 1 (ie, the zero element or the 1 element in the codebook may also be expressed as ).
  • the number of the uplink transmission layer is equal to 1, and the resource allocation information indication field is used to indicate at least two sub-bands of the uplink scheduling, and the uplink transmission precoding matrix corresponding to the at least two sub-bands a sum of squares of modulus values corresponding to all elements in the Kth row, and a sum of squares of modulus values corresponding to all elements in the Lth row of the uplink transmission precoding matrix corresponding to the at least two subbands, the K sum
  • the L is a positive integer less than or equal to the number of antenna ports, and the K is not equal to the L.
  • the number of uplink transmission layers is greater than 1, and the sum of squares of modulus values corresponding to all elements in the Kth row of the uplink transmission precoding matrix corresponding to the at least one subband, And a sum of squares of modulus values corresponding to all elements in the Lth row of the uplink transmission precoding matrix corresponding to the at least one subband is equal, and the K and the L are both positive integers less than or equal to the number of antenna ports, and the K is not equal to the L.
  • the coefficient indication information is sent to the terminal device, where the coefficient indication information is used to indicate an element in an uplink transmission precoding matrix in the codebook or the target codebook.
  • ⁇ m,n and/or said It should be noted that in practical applications, ⁇ m,n may also be equal to 0 or 1.
  • the coefficient indication information includes: M-bit first coefficient indication information and/or N-bit second coefficient indication information; wherein the first coefficient indication information is used to indicate the ⁇ m,n , the second coefficient indication information is used to indicate the Both M and N are positive integers greater than zero.
  • the method for indicating a transmission precoding matrix provided by the foregoing first aspect and the second aspect, wherein the network device determines, by the network device, the uplink scheduling resource (the resource corresponds to at least one subband) and the transmission precoding matrix corresponding to the at least one subband.
  • downlink control information including a resource allocation information indication field, a transmission layer number indication domain, and a transmission precoding matrix indication domain corresponding to the at least one subband; and further, the terminal Determining, by the resource allocation information indication field, the at least one subband of the uplink scheduling, and determining a number of bits of the transmission precoding matrix indication field corresponding to the subband (the transmission precoding matrix indication domain corresponding to the subband)
  • the number of bits is related to the number of corresponding subbands of the uplink scheduled resource, and determining the subband corresponding to the number of bits of the transmission precoding matrix indication field and the number of the uplink transmission layer corresponding to the subband.
  • Uplink transmission precoding matrix Uplink transmission precoding matrix.
  • the indication of the uplink transmission precoding matrix in the frequency selective scheduling is implemented, and the number of bits of the transmission precoding matrix indication field corresponding to the subband is flexibly adjusted according to the number of the scheduling subbands, thereby effectively
  • the use of the transmission precoding indication field improves the utilization of control channel resources.
  • the uplink transmission precoding matrix corresponding to the subband includes: at least one non-zero element, and a modulus value of the non-zero element is different from a modulus value of other non-zero elements in the uplink transmission precoding matrix, That is, a non-constant modulus precoding matrix is used, which can better match the actual channel, thereby improving the precoding performance.
  • an indication method for transmitting a precoding matrix including:
  • the downlink control information includes: a resource allocation information indication field, a transmission layer number indication field, and a transmission precoding matrix indication field corresponding to at least one subband, where the resource allocation information indication domain is used a resource indicating an uplink scheduling, where the resource corresponds to at least one sub-band, the number of transmission layer indication fields is used to indicate an uplink transmission layer, and the transmission precoding matrix indication field corresponding to the sub-band is used to indicate that the sub-band corresponds to Uplink transmission precoding matrix;
  • the number of bits of the transmission precoding matrix indication field corresponding to the subband satisfies the following formula:
  • N min ⁇ floor(N ⁇ /N s ),N max ⁇
  • N represents the number of bits of the transmission precoding matrix indication field corresponding to the subband
  • floor() represents a downward rounding function
  • N ⁇ represents a preset total number of bits of the transmission precoding matrix indication field
  • N s Representing the number of the at least one subband and N max representing a preset maximum number of bits of the transmission precoding matrix indication field, the number of the at least one subband being a positive integer not less than one.
  • the number of bits of the transmission precoding matrix indication field corresponding to the subband is equal to: a target of the transmission precoding matrix indicating the domain corresponding to the number of the at least one subband in the preset information a preset number of bits, wherein the preset information includes: a correspondence between a preset number of subbands and a preset number of bits of a transmission precoding matrix indication field corresponding to the preset number of subbands,
  • the number of at least one sub-band is a positive integer not less than one.
  • the transmission precoding matrix indication field corresponding to the subband is used to indicate an initial index of an uplink transmission precoding matrix corresponding to the subband, and the transmission preamble corresponding to the subband
  • the number of bits of the coding matrix indication field and the number of the uplink transmission layer, and determining an uplink transmission precoding matrix corresponding to the subband including:
  • the correspondence between the initial index and the target index satisfies the following formula or the following formula corresponding to the formula:
  • k represents an index adjustment coefficient
  • ⁇ represents an index offset coefficient
  • I dx represents the target index
  • k is a preset value or a value configured by the network device
  • ⁇ is a preset The value or the value of the network device configuration.
  • the transmission precoding matrix indication field corresponding to the subband is used to indicate an index of an uplink transmission precoding matrix corresponding to the subband, and the transmission precoding according to the subband is performed.
  • the number of bits of the matrix indication field and the number of the uplink transmission layers, and the uplink transmission precoding matrix corresponding to the subband including:
  • the embodiment of the present application provides an indication method for transmitting a precoding matrix, including:
  • the terminal device Determining, by the terminal device, the uplink scheduling resource and the number of bits of the transmission precoding matrix indication field corresponding to the at least one subband; wherein the resource corresponds to at least one subband, and the transmission precoding matrix corresponding to the subband indicates the number of bits of the domain Not exceeding a preset total number of bits of the transmission precoding matrix indication field; the sum of the number of bits of the transmission precoding matrix indication field corresponding to each of the subbands is not greater than the preset total number of bits, and the transmission corresponding to the subband
  • the number of bits of the precoding matrix indication field is related to the number of subbands corresponding to the uplink scheduled resource;
  • the downlink control information includes: a resource allocation information indication field, a transmission layer number indication field, and a transmission precoding matrix indication field corresponding to the at least one subband, where the resource allocation information indicates a domain
  • the resource for indicating uplink scheduling, the number of transmission layer indication fields is used to indicate the number of uplink transmission layers, and the transmission precoding matrix indication field corresponding to the subband is used to indicate uplink transmission precoding corresponding to the subband matrix.
  • the number of bits of the transmission precoding matrix indication field corresponding to the subband satisfies the following formula:
  • N min ⁇ floor(N ⁇ /N s ),N max ⁇
  • N represents the number of bits of the transmission precoding matrix indication field corresponding to the subband
  • floor() represents a downward rounding function
  • N ⁇ represents a preset total number of bits of the transmission precoding matrix indication field
  • N s Representing the number of the at least one subband and N max representing a preset maximum number of bits of the transmission precoding matrix indication field, the number of the at least one subband being a positive integer not less than one.
  • the number of bits of the transmission precoding matrix indication field corresponding to the subband is equal to: a target of the transmission precoding matrix indication domain corresponding to the number of the at least one subband in the preset information. a preset number of bits, wherein the preset information includes: a correspondence between a preset number of subbands and a preset number of bits of a transmission precoding matrix indication field corresponding to the preset number of subbands,
  • the number of at least one sub-band is a positive integer not less than one.
  • the transmission precoding matrix indication field corresponding to the subband is used to indicate an initial index of an uplink transmission precoding matrix corresponding to the subband, where the initial index corresponds to the subband Corresponding relationship between the target indexes of the transmission precoding matrix;
  • the transmission precoding matrix indication field corresponding to the subband is used to indicate an index of an uplink transmission precoding matrix corresponding to the subband, and the index is used to indicate a transmission precoding matrix corresponding to the subband in a target codebook. And indicating an uplink transmission precoding matrix corresponding to the index indicated by the domain, where the target codebook matches the number of bits of the transmission precoding matrix indication field corresponding to the subband and the number of the uplink transmission layer.
  • the method for indicating a transmission precoding matrix provided by the foregoing third aspect and the fourth aspect, the determining, by the network device, the resource scheduled by the terminal device for uplink scheduling (the resource corresponding to at least one subband) and the transmission precoding matrix corresponding to the at least one subband And indicating, to the terminal, downlink control information including a resource allocation information indication field, a transmission layer number indication domain, and a transmission precoding matrix indication domain corresponding to the at least one subband; and further, the terminal Determining, by the resource allocation information indication field, the at least one subband of the uplink scheduling, and determining a number of bits of the transmission precoding matrix indication field corresponding to the subband (the transmission precoding matrix indication domain corresponding to the subband) The number of bits is related to the number of corresponding subbands of the uplink scheduled resource, and determining the subband corresponding to the number of bits of the transmission precoding matrix indication field and the number of the uplink transmission layer corresponding to the subband.
  • Uplink transmission precoding matrix It can be seen that the indication of the uplink transmission precoding matrix in the frequency selective scheduling is implemented, and the number of bits of the transmission precoding matrix indication field corresponding to the subband is flexibly adjusted according to the number of the scheduling subbands, thereby effectively The use of the transmission precoding indication field improves the utilization of control channel resources.
  • the embodiment of the present application provides an indication method for transmitting a precoding matrix, including:
  • transmission precoding matrix indication information is used to indicate at least one uplink transmission precoding matrix in an uplink transmission precoding matrix included in the codebook
  • the transmission layer number indication information is used to indicate the number of transmission layers
  • the uplink transmission precoding matrix includes: at least one non-zero The elements and the modulus values of the non-zero elements are different from the modulus values of other non-zero elements in the uplink transmission precoding matrix.
  • the number of transmission layers is equal to 1, and the transmission precoding matrix indication information is used to indicate at least two uplink transmission precoding matrices in an uplink transmission precoding matrix included in the codebook.
  • the different uplink transmission precoding matrices correspond to different subbands, the sum of squares of modulus values corresponding to all elements in the Kth row of the at least two uplink transmission precoding matrices, and the at least two uplinks
  • the sum of the squares of the modulus values corresponding to all the elements in the Lth row of the transmission precoding matrix is equal, and both K and L are positive integers less than or equal to the number of antenna ports, and the K is not equal to the L.
  • the number of transmission layers is greater than 1, and a sum of squares of modulus values corresponding to all elements in the Kth row of the at least one uplink transmission precoding matrix, and the at least one uplink transmission pre
  • the sum of the squares of the modulus values corresponding to all the elements in the Lth row of the coding matrix is equal, and both K and L are positive integers less than or equal to the number of antenna ports, and the K is not equal to the L.
  • the non-zero and non-zero element in the uplink transmission precoding matrix in the codebook is
  • ⁇ m,n represents the amplitude coefficient of the mth row and the nth column element in the uplink transmission precoding matrix, 0 ⁇
  • the m is a positive integer less than or equal to the number of antenna ports, and the n is a positive integer less than or equal to the number of transmission layers.
  • the method further includes:
  • the coefficient indication information being used to indicate an element in an uplink transmission precoding matrix in the codebook Said ⁇ m,n and/or said
  • the coefficient indication information includes: M-bit first coefficient indication information and/or N-bit second coefficient indication information; wherein the first coefficient indication information is used to indicate the ⁇ m,n , the second coefficient indication information is used to indicate the Both M and N are positive integers greater than zero.
  • the embodiment of the present application provides an indication method for transmitting a precoding matrix, including:
  • the uplink transmission precoding matrix includes: at least one non-zero element and a modulus value of the non-zero element and the uplink transmission precoding The modulus values of other non-zero elements in the matrix are different;
  • transmission precoding matrix indication information is used to indicate the at least one uplink transmission in an uplink transmission precoding matrix included in the codebook a precoding matrix
  • transmission layer number indication information is used to indicate the number of transmission layers.
  • the number of the transmission layers is equal to 1, and the at least one uplink transmission precoding matrix corresponding to the determining terminal device includes:
  • the different uplink transmission precoding matrices correspond to different subbands, and all of the at least two uplink transmission precoding matrices in the Kth row a sum of squares of modulus values corresponding to the elements, equal to a sum of squares of modulus values corresponding to all elements in the Lth row of the at least two uplink transmission precoding matrices, wherein the K and the L are both less than or equal to A positive integer of the number of antenna ports, and the K is not equal to the L.
  • the number of transmission layers is greater than 1, and a sum of squares of modulus values corresponding to all elements in the Kth row of the at least one uplink transmission precoding matrix, and the at least one uplink transmission pre
  • the sum of the squares of the modulus values corresponding to all the elements in the Lth row of the coding matrix is equal, and both K and L are positive integers less than or equal to the number of antenna ports, and the K is not equal to the L.
  • a non-zero and non-zero element of any one of the uplink transmission precoding matrices in the uplink transmission precoding matrix in the codebook is
  • ⁇ m,n represents the amplitude coefficient of the mth row and the nth column element in the uplink transmission precoding matrix, 0 ⁇
  • the m is a positive integer less than or equal to the number of antenna ports, and the n is a positive integer less than or equal to the number of transmission layers.
  • the method further includes:
  • the coefficient indication information includes: M-bit first coefficient indication information and/or N-bit second coefficient indication information; wherein the first coefficient indication information is used to indicate the ⁇ m,n , the second coefficient indication information is used to indicate the Both M and N are positive integers greater than zero.
  • the method for indicating a transmission precoding matrix provided by the fifth aspect and the sixth aspect, wherein the network device determines at least one uplink transmission precoding matrix corresponding to the terminal device and the number of transmission layers, and sends a transmission precoding matrix to the terminal device.
  • Instructing information for indicating the at least one uplink transmission precoding matrix in an uplink transmission precoding matrix included in the codebook
  • transmission layer number indication information for indicating a number of transmission layers
  • the terminal device And determining, according to the transmission precoding matrix indication information, the transmission layer number indication information, and the codebook, the at least one uplink transmission precoding matrix, where the uplink transmission precoding matrix includes: at least one non-zero The elements and the modulus values of the non-zero elements are different from the modulus values of other non-zero elements in the uplink transmission precoding matrix. It can be seen that the indication of the uplink transmission precoding matrix is implemented, and because the non-constant modulus precoding matrix is adopted, the actual channel can be better matched, thereby improving the precoding performance.
  • the embodiment of the present application provides an indication method for transmitting a precoding matrix, including:
  • the downlink control information includes: a transmission precoding matrix indication field and a transmission layer number indication field, where the transmission precoding matrix indication field is used to indicate at least one uplink transmission precoding matrix Index, the number of transmission layer indication fields is used to indicate the number of uplink transmission layers;
  • the uplink transmission precoding matrix Determining the uplink transmission precoding matrix according to the index of the at least one uplink transmission precoding matrix, the number of transmission layers, and a codebook subset; wherein the codebook subset is corresponding to the uplink transmission layer number Part of the codebook.
  • the index of each uplink transmission precoding matrix in the codebook subset is: an index that is newly re-established according to a sequence of indexings of the uplink transmission precoding matrices in the codebook.
  • the method further includes:
  • the configuration message is used to indicate the codebook subset
  • the configuration message may be a high layer signaling message or a physical layer signaling message.
  • the configuration message includes: at least one bit, the bit is used to indicate whether at least one transmission precoding matrix corresponding to the bit in the codebook belongs to the a codebook subset; if the value of the bit is equal to a preset value, the at least one transmission precoding matrix corresponding to the bit in the codebook belongs to the codebook subset.
  • the configuration message includes: a sampling factor l and an offset ⁇ ; an index in the codebook Satisfy formula a transmission precoding matrix belonging to the codebook subset; wherein Representing the index of the precoding matrix transmitted in the codebook, mod represents the remainder operation.
  • the embodiment of the present application provides an indication method for transmitting a precoding matrix, including:
  • the downlink control information includes: a transmission precoding matrix indication field and a transmission layer number indication field, where the transmission precoding matrix indication field is used to indicate the at least one uplink transmission pre An index of the coding matrix, where the number of transmission layer indication fields is used to indicate the number of uplink transmission layers, and the number of bits of the transmission precoding matrix indication field is related to the number of precoding matrices included in the codebook subset, the codebook The subset is a part of the codebook corresponding to the number of uplink transmission layers.
  • the method further includes:
  • the configuration message is used to indicate the codebook subset, where the configuration message may be a high layer signaling message or a physical layer signaling message.
  • the index of each uplink transmission precoding matrix in the codebook subset is: an index that is newly re-established according to a sequence of indexings of the uplink transmission precoding matrices in the codebook.
  • the configuration message includes: at least one bit, where the bit is used to indicate; whether at least one transmission precoding matrix corresponding to the bit in the codebook belongs to the a codebook subset; if the value of the bit is equal to a preset value, the at least one transmission precoding matrix corresponding to the bit in the codebook belongs to the codebook subset.
  • the configuration message includes: a sampling factor l and an offset ⁇ ; an index in the codebook Satisfy formula a transmission precoding matrix belonging to the codebook subset; wherein Representing the index of the precoding matrix transmitted in the codebook, mod represents the remainder operation.
  • the method for indicating a transmission precoding matrix provided by the seventh aspect and the eighth aspect, wherein the network device determines at least one uplink transmission precoding matrix corresponding to the terminal device and the uplink transmission layer number, and sends downlink control information to the terminal device.
  • the downlink control information includes: a transmission precoding matrix indication field and a transmission layer number indication field, where the transmission precoding matrix indication field is used to indicate an index of the at least one uplink transmission precoding matrix, the transmission The layer number indication field is used to indicate the number of uplink transmission layers, where the number of bits of the transmission precoding matrix indication field is related to the number of precoding matrices included in the codebook subset, and the codebook subset is the uplink transmission layer.
  • the terminal device determining, by the terminal device, the uplink transmission precoding matrix according to an index of the at least one uplink transmission precoding matrix, the number of transmission layers, and the codebook subset. . It can be seen that the indication of the uplink transmission precoding matrix is implemented, and since the codebook subset is a part of the codebook corresponding to the uplink transmission layer number, the number of bits of the transmission precoding matrix indication domain is smaller than The transmission precoding matrix indicating the codebook indicates the number of bits of the domain, thereby reducing the overhead of transmitting the precoding matrix indication domain.
  • an embodiment of the present application provides an apparatus, including: a processor and a memory;
  • the memory is used to store instructions for executing the instructions stored by the memory, and when the processor executes the instructions stored by the memory, the device is configured to complete the first aspect, Any of the methods described in any of the third aspect, the fifth aspect, and the seventh aspect.
  • the device may further include an input and output port.
  • the device may be a terminal device or a chip that can be disposed in the terminal device.
  • an embodiment of the present application provides an apparatus, including: a processor and a memory;
  • the memory is for storing instructions
  • the processor is configured to execute the instructions stored by the memory
  • the device is configured to complete the second aspect, Any of the methods described in any of the four aspects, the sixth aspect, and the eighth aspect.
  • the device may further include an input and output port.
  • the device may be a network device, or a chip that can be disposed in the network device.
  • the embodiment of the present application provides an apparatus for transmitting a precoding matrix, including some modules, for implementing any method involved in the foregoing terminal device.
  • the specific modules may correspond to the method steps, and are not described herein.
  • the embodiment of the present application provides an apparatus for transmitting a precoding matrix, including some modules, for implementing any one of the foregoing network devices.
  • the specific modules may correspond to the method steps, and are not described herein.
  • a computer storage medium is further provided for storing instructions that, when executed, perform any of the methods involved in the foregoing terminal device or network device.
  • a communication system including the terminal device and the network device provided in the foregoing.
  • the method and device for indicating a transmission precoding matrix of the information provided by the present application determine, by the network device, a resource scheduled by the terminal device for uplink scheduling (the resource corresponds to at least one subband) and corresponding to at least one subband.
  • the indication of the uplink transmission precoding matrix in the frequency selective scheduling is implemented, and the number of bits of the transmission precoding matrix indication field corresponding to the subband is flexibly adjusted according to the number of the scheduling subbands, thereby effectively
  • the use of the transmission precoding indication field improves the utilization of control channel resources.
  • the sub-bands involved in the embodiment of the present application refer to a pre-defined or configured Precoding Resource Block Group (PRG) that uses the same precoding matrix for precoding, that is, in a subband. All physical resource blocks used for data transmission by the terminal device are precoded using the same uplink transmission precoding matrix.
  • PRG Precoding Resource Block Group
  • At least one precoding matrix (or a transmission precoding matrix, or an uplink transmission precoding matrix, etc.) is included in the codebook, the target codebook, or the codebook subset and the like involved in the embodiments of the present application. ).
  • FIG. 1 is a network diagram of a system provided by the present application.
  • Embodiment 1 is a schematic flowchart of Embodiment 1 of a method for indicating a transmission precoding matrix provided by the present application;
  • 2B is a schematic diagram of an uplink transmission precoding matrix corresponding to different subbands
  • Embodiment 3 is a schematic flowchart of Embodiment 2 of a method for indicating a transmission precoding matrix provided by the present application;
  • Embodiment 4 is a schematic flowchart of Embodiment 3 of a method for indicating a transmission precoding matrix provided by the present application;
  • FIG. 5 is a schematic flowchart of Embodiment 4 of a method for indicating a transmission precoding matrix provided by the present application
  • FIG. 6 is a schematic diagram 1 of a device according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a terminal device according to the present application.
  • Figure 8 is a schematic diagram 2 of the device provided by the embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • the method and device for indicating the transmission precoding matrix provided by the present application can be applied to the system architecture diagram shown in FIG. 1.
  • the system architecture includes: a network device and at least one terminal device.
  • the method for indicating the transmission precoding matrix provided by the present application may be applicable to an application scenario in which the uplink precoding transmission is performed by the NR in any terminal device, and of course, may be applicable to other application scenarios. This embodiment of the present application does not limit this.
  • the transmission precoding matrix indicator (TPMI) information required for the uplink transmission precoding of the terminal device can be obtained through Downlink Control Information (DCI) of the network device, or through uplink and downlink.
  • DCI Downlink Control Information
  • the channel reciprocity is obtained, so that the terminal device can perform uplink data transmission according to the uplink transmission precoding matrix indicated by the TPMI information.
  • the value corresponding to the TPMI information is equal to the precoding matrix index in the codebook.
  • the system designs a certain number of precoding matrices to represent the quantized channels or direction vectors corresponding to the channels, and these precoding matrices are designed to form a codebook.
  • Each precoding matrix in the codebook corresponds to a precoding matrix index, and usually the precoding matrix index has a corresponding relationship with the corresponding TPMI.
  • the one precoding matrix index may be indicated by one TPMI alone or by multiple TPMIs.
  • the codebook may be predefined, and the network device and the terminal device both store the corresponding codebook, and understand the correspondence between each precoding matrix, precoding matrix index and TPMI in the codebook. It is consistent.
  • the network device After the network device selects a precoding matrix from the defined codebook according to the estimated uplink channel and determines its precoding matrix index, only the precoding matrix index (or TPMI) corresponding to the selected precoding matrix needs to be selected.
  • the terminal device can be notified by the downlink signaling (for example, physical layer signaling DCI, etc.), and the terminal device can determine a specific precoding matrix according to the signaling sent by the network device.
  • the network device shown in FIG. 1 may refer to a device in the access network that communicates with the wireless terminal through the at least one sector on the air interface.
  • the network device may be used to receive the received air frame and the Internet protocol.
  • the (Internet Protocol, IP) packets are converted to each other as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network may include an (IP) network.
  • IP Internet Protocol
  • the network device can also coordinate attribute management of the air interface.
  • the foregoing network device may be a base station, where the base station may be a base station (NodeB) in WCDMA, or may be an evolved base station (eNodeB or eNB or e-NodeB, evolved Node B) in LTE, or may be an NR.
  • the Transmission Reception Point (TRP), gNB, or TP (transmission point) is not limited in this application.
  • the terminal device shown in FIG. 1 may be a User Equipment (UE), which is a device that provides voice and/or data connectivity to a user, for example, a handheld device with a wireless connection function, and an in-vehicle device. Wait.
  • UE User Equipment
  • the terminal device may be a handheld device with wireless connection function or other processing device connected to the wireless modem.
  • the terminal device can also communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), for example, the terminal device may be a mobile terminal, such as a mobile phone (or “cellular” "Phone” and a computer having a mobile terminal, which may be a portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile device that can interact with the core network for voice and/or data.
  • a radio access network eg, RAN, Radio Access Network
  • the terminal device may be a mobile terminal, such as a mobile phone (or “cellular” "Phone” and a computer having a mobile terminal, which may be a portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile device that can interact with the core network for voice and/or data.
  • RAN Radio Access Network
  • the present application is applicable not only to NR but also to a Universal Mobile Telecommunications System (UMTS) system, a CDMA system, a wireless local area network (WLAN), a wireless communication system such as LTE, and the like.
  • UMTS Universal Mobile Telecommunications System
  • CDMA Code Division Multiple Access
  • WLAN wireless local area network
  • LTE Long Term Evolution
  • the downlink control channel size is usually fixed in the prior art (that is, the transmission precoding indication field is fixed), which may cause the transmission precoding indication field corresponding to the unscheduled subband to be invalid. Utilization, resulting in waste of control channel resources. Therefore, the first embodiment of the method for indicating a transmission precoding matrix provided by the present application is to solve the technical problem of waste of control channel resources in the prior art.
  • Embodiment 1 is a schematic flowchart of Embodiment 1 of a method for indicating a transmission precoding matrix provided by the present application.
  • the execution subject involved in this embodiment includes: a terminal device and/or a network device, and both the terminal device and the network device can be implemented by software and/or hardware.
  • the method in this embodiment includes:
  • Step S201 Determine, by the terminal device, the uplink scheduling resource and the number of bits of the transmission precoding matrix indication field corresponding to the at least one of the subbands.
  • the network device determines the uplink scheduling resource of the terminal device according to the uplink load status of the current network and the uplink channel state information of the terminal device.
  • the resource is a PRB, according to the correspondence between the PRB and the subband Determining, by the relationship, at least one subband corresponding to the PRB of the uplink scheduling; or, if the resource is a subband, directly determining at least one subband of the uplink scheduling of the terminal; further, according to the at least one subband The number of bits of the transmission precoding matrix indication field corresponding to at least one of the subbands is determined; wherein the number of bits of the transmission precoding matrix indication field corresponding to any one of the subbands is not greater than a preamble of the transmission precoding matrix indication field The total number of bits is set; the sum of the number of bits of the transmission precoding matrix indication field corresponding to each of the subbands is not greater than the preset total number of bits, and the number of bits of the transmission precoding matrix indication field
  • the sub-bands involved in the embodiment of the present application refer to a pre-defined or configured Precoding Resource Block Group (PRG) that uses the same precoding matrix for precoding, that is, in a subband. All physical resource blocks used for data transmission by the terminal device are precoded using the same uplink transmission precoding matrix.
  • the subband may be a plurality of consecutive PRBs, and the consecutive PRBs are precoded using the same precoding matrix, thereby ensuring that the receiving side can perform channel estimation more accurately.
  • the uplink scheduling unit of the network device may be a PRB or a set of multiple PRBs according to a preset relationship, which is not limited in this application.
  • the sub-band of the present application refers to a sub-band to which the PRB of the uplink scheduling of the network device belongs according to the relationship between the PRB and the sub-band, and the determined PRB belongs to the sub-band. limited. For example, two PRBs are scheduled, corresponding to PRB1 and PRB10 respectively. If the subband is defined as five consecutive PRBs, and the smallest PRB index of the five consecutive PRBs is divisible by five, the two PRBs belong to two subbands. A separate TPMI domain is required for transmission precoding matrix indication.
  • the achievable manner that the number of bits of the transmission precoding matrix indication field corresponding to any one of the subbands is related to the number of the uplink scheduled subbands includes at least the following:
  • the number of bits of the transmission precoding matrix indication field corresponding to any of the subbands satisfies the following formula:
  • N min ⁇ floor(N ⁇ /N s ),N max ⁇
  • N represents the number of bits of the transmission precoding matrix indication field corresponding to the subband
  • floor() represents a downward rounding function
  • N ⁇ represents a preset total number of bits of the transmission precoding matrix indication field
  • N s Representing the number of the at least one subband and N max representing a preset maximum number of bits of the transmission precoding matrix indication field, the number of the at least one subband being a positive integer not less than one.
  • the preset total number of bits N ⁇ of the transmission precoding matrix indication field is 20 bits, and the preset maximum number of bits N max of the transmission precoding matrix indication field is 6 bits;
  • the number of sub-bands N s is 10
  • the number of scheduled sub-bands N s is 5
  • the second implementation manner is: the number of bits of the transmission precoding matrix indication field corresponding to the subband is equal to: a target preset of the transmission precoding matrix indication domain corresponding to the number of the at least one subband in the preset information
  • the number of bits includes: a correspondence between at least one preset subband number and a preset number of bits of a transmission precoding matrix indication field corresponding to the preset number of subbands, the at least one The number of subbands is a positive integer not less than one.
  • the network device determines, according to the number of the at least one subband and the preset information, the number of bits of the transmission precoding matrix indication field corresponding to the subband, where the subband corresponds to The number of bits of the transmission precoding matrix indication field is equal to the number of target preset bits of the transmission precoding matrix indication field corresponding to the number of the at least one subband in the preset information.
  • the preset information is preset in the network device and the terminal device, or, optionally, the preset information in the terminal device may also be used by the network device to pass the high layer signaling.
  • the message is configured to the terminal device, and the high-level signaling message may be a Radio Resource Control (RRC) message or a Media Access Control Element (MAC CE).
  • RRC Radio Resource Control
  • MAC CE Media Access Control Element
  • the achievable manner that the number of bits of the transmission precoding matrix indicator field corresponding to any one of the subbands is related to the number of the uplink subbands may also include other implementable manners. This is not a limitation.
  • Step S202 Send downlink control information to the terminal device.
  • the network device sends downlink control information to the terminal device, where the downlink control information includes: a resource allocation information indication field, a transmission layer number indication field, and a transmission precoding matrix corresponding to the at least one subband.
  • the indication domain, the resource allocation information indication field is used to indicate the resource scheduled by the uplink, and the number of transmission layer indication fields is used to indicate the number of uplink transmission layers corresponding to the terminal device determined by the network device, where The corresponding transmission precoding matrix indication field is used to indicate the uplink transmission precoding matrix corresponding to the subband determined by the network device.
  • the method for determining, by the network device, the number of the uplink transmission layer and the at least one uplink transmission precoding matrix of the terminal device refer to the determining manner in the prior art, where This is not a limitation.
  • the indication information may be included in the downlink control information, which is not limited in this embodiment.
  • the transmission precoding matrix indication field corresponding to the subband is used to indicate an initial index of an uplink transmission precoding matrix corresponding to the subband, where the initial index is related to the transmission precoding matrix of the subband
  • the target pre-coding matrix indication field is used to indicate an index of the uplink transmission precoding matrix corresponding to the sub-band, and the index is used to indicate the target codebook.
  • the transmission precoding matrix corresponding to the subband indicates an uplink transmission precoding matrix corresponding to an index indicated by the domain, and the number of bits of the transmission precoding matrix indication field corresponding to the subband and the uplink transmission layer The numbers match.
  • the transmission layer number indication domain and the transmission precoding matrix indication domain corresponding to the at least one subband may be merged into one of the downlink control information, in this embodiment. There is no limit to this.
  • Step S203 Receive downlink control information from a network device.
  • the terminal device receives the downlink control information from the network device, where the downlink control information includes: the resource allocation information indication domain, the transmission layer number indication domain, and the at least a sub-band corresponding to the transmission precoding matrix indicator field, where the resource allocation information indication field is used to indicate the uplink scheduling resource, the resource corresponds to at least one subband, and the transmission layer number indication field is used to indicate the The number of uplink transmission layers, the transmission precoding matrix indication field corresponding to any of the subbands is used to indicate an uplink transmission precoding matrix corresponding to the subband.
  • the terminal device determines, according to a correspondence between the preset subband and the transmission precoding matrix indication domain, a transmission precoding matrix indication domain corresponding to each subband; of course, the terminal device may also be according to other manners.
  • the transmission precoding matrix indicator field corresponding to each subband is determined, which is not limited in this embodiment of the present application.
  • Step S204 Determine a number of bits of the transmission precoding matrix indication domain corresponding to the subband.
  • the terminal device determines, according to the correspondence between the PRB and the subband, at least one of the PRBs corresponding to the uplink scheduling. If the resource allocation information indicates that the resource for the uplink scheduling indicated by the domain is a subband, the terminal device directly determines at least one subband of the uplink scheduling; of course, if the resource allocation information When the indicator field is used to indicate that the uplink scheduling resource is other information, the terminal device may determine at least one sub-band of the uplink scheduling according to other manners, which is not limited in this embodiment.
  • the terminal device determines, according to the number of the at least one subband scheduled by the uplink, the number of bits of the transmission precoding matrix indication field corresponding to the at least one subband; wherein any one of the subbands corresponds to a transmission pre
  • the number of bits of the coding matrix indication field is not greater than the preset total number of bits of the transmission precoding matrix indication field; the sum of the number of bits of the transmission precoding matrix indication field corresponding to each of the subbands is not greater than the preset total bit
  • the number of bits of the transmission precoding matrix indication field corresponding to any of the subbands is related to the number of subbands corresponding to the uplink scheduled resources.
  • the achievable manner that the number of bits of the transmission precoding matrix indication field corresponding to any one of the subbands is related to the number of the uplink scheduled subbands includes at least the following:
  • the number of bits of the transmission precoding matrix indication field corresponding to any of the subbands satisfies the following formula:
  • N min ⁇ floor(N ⁇ /N s ),N max ⁇
  • N represents the number of bits of the transmission precoding matrix indication field corresponding to the subband
  • floor() represents a downward rounding function
  • N ⁇ represents a preset total number of bits of the transmission precoding matrix indication field
  • N s Representing the number of the at least one subband and N max representing a preset maximum number of bits of the transmission precoding matrix indication field, the number of the at least one subband being a positive integer not less than one.
  • the number of bits of the transmission precoding matrix indication field corresponding to the subband is equal to: a target of the transmission precoding matrix indicating domain corresponding to the number of the at least one subband in the preset information.
  • a preset number of bits wherein the preset information includes: a correspondence between a preset number of subbands and a preset number of bits of a transmission precoding matrix indication field corresponding to the preset number of subbands,
  • the number of at least one sub-band is a positive integer not less than one.
  • the terminal device determines, according to the number of the at least one subband and the preset information, a bit number of a transmission precoding matrix indication field corresponding to the subband, where the subband
  • the number of bits of the corresponding transmission precoding matrix indication field is equal to the number of target preset bits of the transmission precoding matrix indication field corresponding to the number of the at least one subband in the preset information.
  • the achievable manner that the number of bits of the transmission precoding matrix indicator field corresponding to any one of the subbands is related to the number of the uplink subbands may also include other implementable manners. This is not a limitation.
  • Step S205 Determine, according to the number of bits of the transmission precoding matrix indication field and the number of the uplink transmission layer corresponding to the subband, an uplink transmission precoding matrix corresponding to the subband.
  • the terminal device determines, according to the number of bits of the transmission precoding matrix indication field and the number of the uplink transmission layer corresponding to the subband, an uplink transmission precoding matrix corresponding to the subband, so as to further The uplink transmission precoding matrix corresponding to the subband preprocesses the data to be transmitted.
  • determining, according to the number of bits of the transmission precoding matrix indication field and the number of the uplink transmission layer, the achievable manner of the uplink transmission precoding matrix corresponding to the subband at least including the following the way:
  • the transmission precoding matrix indication field corresponding to the subband is used to indicate an initial index of an uplink transmission precoding matrix corresponding to the subband, and according to the transmission precoding matrix indication domain corresponding to the subband The number of bits and the value of the transmission precoding matrix indication field corresponding to the subband, determining an initial index of the uplink transmission precoding matrix corresponding to the subband; according to the initial index and the correspondence between the initial index and the target index And determining, by the relationship, the target index of the uplink transmission precoding matrix corresponding to the adjusted subband; and determining, according to the target index, the uplink transmission layer number, and the codebook, an uplink transmission precoding matrix corresponding to the subband.
  • the terminal device transmits according to the subband.
  • the number of bits of the precoding matrix indication field determines the value of the transmission precoding matrix indicator field corresponding to the subband, and further determines an initial index of the uplink transmission precoding matrix corresponding to the subband (equal to the transmission preamble corresponding to the subband)
  • the coding matrix indicates the value of the field).
  • the terminal device determines, according to the initial index and the correspondence between the initial index and the target index, the target index of the adjusted uplink transmission precoding matrix corresponding to the subband, where the initial index is
  • the correspondence between the target indexes may be a preset correspondence, or may be a corresponding relationship configured by the network device by using a high layer signaling message or a physical layer signaling message.
  • the terminal device determines, according to the target index, the uplink transmission layer number, and the codebook, a target precoding matrix that matches the target index and the number of transmission layers from the codebook.
  • the sub-band corresponds to an uplink transmission precoding matrix.
  • the codebook is pre-configured in the terminal device and the network device, or the network device configures the codebook to the terminal by using a high layer signaling message or a physical layer signaling message. device.
  • the correspondence between the initial index and the target index satisfies the following formula or a corresponding formula of the following formula: among them, Representing the initial index, k represents an index adjustment coefficient, ⁇ represents an index offset coefficient, I dx represents the target index, and k is a preset value or a value configured by the network device, and the ⁇ is a preset The value or the value of the network device configuration.
  • the correspondence between the initial index and the target index may also satisfy the formula Other equivalents or deformation formulas are not limited in the embodiments of the present application.
  • the transmission precoding matrix indication field corresponding to the subband is used to indicate an index of an uplink transmission precoding matrix corresponding to the subband, and the transmission corresponding to the subband is determined in the target codebook.
  • the precoding matrix indicates an uplink transmission precoding matrix corresponding to the index indicated by the domain, and the target codebook matches the number of bits of the transmission precoding matrix indication field corresponding to the subband and the number of the uplink transmission layer.
  • the terminal device determines the location from the codebook set. And the target codebook that matches the number of bits of the transmission precoding matrix indication field and the number of the uplink transmission layer, where the codebook set includes: at least one codebook, and the transmission preamble corresponding to the different codebooks
  • the codebook set includes: at least one codebook, and the transmission preamble corresponding to the different codebooks
  • the number of bits of the coding matrix indication field and/or the number of the uplink transmission layers are different; for example, corresponding to one uplink transmission layer, the codebook set includes multiple codebooks, wherein different codebooks correspond to transmission precoding matrices The number of bits of the indication field is different.
  • the number of bits of the transmission precoding matrix indication field may be included, and the codebook set may include one codebook (that is, the codebooks with different uplink transmission layers correspond to the same codebook), or multiple The codebook (that is, the number of uplink transmission layers corresponding to different codebooks is different, or the number of uplink transmission layers corresponding to different codebooks is different). Further, the terminal device determines, in the target codebook, an uplink transmission precoding matrix corresponding to an index indicated by a transmission precoding matrix indication field corresponding to the subband.
  • the network device determines, by the network device, the resource scheduled by the terminal device, where the resource corresponds to at least one subband, and the number of bits of the transmission precoding matrix indication field corresponding to the at least one subband, and sends the resource to the terminal.
  • the indication of the uplink transmission precoding matrix in the frequency selective scheduling is implemented, and the number of bits of the transmission precoding matrix indication field corresponding to the subband is flexibly adjusted according to the number of the scheduling subbands, thereby effectively
  • the use of the transmission precoding indication field improves the utilization of control channel resources.
  • the uplink transmission precoding matrix corresponding to the subband may belong to the codebook in the foregoing part of the embodiment; if the transmission precoding corresponding to the subband is adopted.
  • the second possible implementation manner of determining the number of bits of the domain and the number of the uplink transmission layer, and determining the uplink transmission precoding matrix corresponding to the subband, where the uplink transmission precoding matrix corresponding to the subband may belong to the present The target codebook in the above section of the embodiment.
  • the uplink transmission precoding matrix corresponding to the subband includes: at least one non-zero element, and a modulus value of the non-zero element is different from a modulus value of other non-zero elements in the uplink transmission precoding matrix, That is, the uplink transmission precoding matrix corresponding to the subband is a non-constant modulus precoding matrix.
  • the non-zero and non-zero element of the uplink transmission precoding matrix in the codebook or the target codebook is
  • ⁇ m,n represents the amplitude coefficient of the mth row and the nth column element in the uplink transmission precoding matrix, 0 ⁇
  • the m is a positive integer less than or equal to the number of antenna ports
  • the n is a positive integer less than or equal to the number of uplink transmission layers.
  • ⁇ m,n may also be equal to 0 or 1 (ie, the zero element or the 1 element in the codebook may also be expressed as ).
  • an embodiment of the present application provides a codebook corresponding to a 2-antenna port.
  • the codebook includes at least one non-constant modulus precoding matrix; the precoding matrix index is 3 and the transport layer.
  • Table 2 is an example of a codebook corresponding to a 2-antenna port provided by an embodiment of the present application.
  • the number of the uplink transmission layer is equal to 1, and the resource allocation information indication field is used to indicate at least two sub-bands of the uplink scheduling, and all the K-th lines of the uplink transmission precoding matrix corresponding to the at least two sub-bands are all And a sum of squares of modulus values corresponding to the elements, and a sum of squares of modulus values corresponding to all elements in the Lth row of the uplink transmission precoding matrix corresponding to the at least two subbands, wherein the K and the L are both A positive integer less than or equal to the number of antenna ports, and the K is not equal to the L.
  • FIG. 2B is a schematic diagram of an uplink transmission precoding matrix corresponding to different subbands. As shown in FIG.
  • the uplink transmission precoding matrix corresponding to subband 0 is
  • the uplink transmission precoding matrix corresponding to the subband 2 is The sum of the squares of the modulus values of all the elements in the first row of the two uplink transmission precoding matrices
  • the sum of the squares of the modulus values corresponding to all the elements in the second row of the two uplink transmission precoding matrices Equal, that is, the power and the corresponding power of different antenna ports ensure the coverage of the uplink.
  • the number of the uplink transmission layers is greater than 1, and the sum of the squares of the modulus values corresponding to all the elements in the Kth row of the uplink transmission precoding matrix corresponding to the at least one subband corresponds to the at least one subband.
  • the sum of the squares of the modulus values corresponding to all the elements in the Lth row of the uplink transmission precoding matrix is equal, the K and the L are both positive integers less than or equal to the number of antenna ports, and the K is not equal to the L.
  • the uplink transmission precoding matrix is Sum of squares of modulus values corresponding to all elements in the first row of the uplink transmission precoding matrix The sum of the squares of the modulus values corresponding to all the elements in the second row of the uplink transmission precoding matrix Equal, so that each antenna port can ensure the same transmission power, ensuring uplink coverage.
  • the network device may further send coefficient indication information to the terminal device, where the coefficient indication information is used to indicate uplink transmission in the codebook or the target codebook.
  • the coefficient indication information includes: M-bit first coefficient indication information and/or N-bit second coefficient indication information; wherein the first coefficient indication information is used to indicate the ⁇ m, n , The second coefficient indication information is used to indicate the Both M and N are positive integers greater than zero.
  • the coefficient indication information includes: 2-bit first coefficient indication information and 2-bit second coefficient indication information, and when the first coefficient indication information corresponds to values 00, 01, 10, and 11, respectively, indicating ⁇ m , n is 0, 0.5, And one of the 1 (such as 00 indicates 0, 01 indicates 0.5, 10 indicates And 11 indicates 1); when the values corresponding to the second coefficient indication information are 00, 01, 10, and 11, respectively, It is one of 0, ⁇ /2, ⁇ , and 3 ⁇ /2 (eg, 00 indicates 0, 01 indicates ⁇ /2, 10 indicates ⁇ , and 11 indicates 3 ⁇ /2).
  • the terminal device receives the coefficient indication information sent by the network device, where the coefficient indication information is used to indicate an element in an uplink transmission precoding matrix in the codebook. Said ⁇ m,n and/or said Determining, according to the coefficient indication information, the codebook; if the coefficient indication information is used to indicate an element in an uplink transmission precoding matrix in the target codebook Said ⁇ m,n and/or said And determining the target codebook according to the coefficient indication information.
  • the network device may also configure a codebook for the terminal device by using other methods, which is not limited in this embodiment.
  • the uplink transmission precoding matrix corresponding to the subband in the embodiment of the present application includes: at least one non-zero element and a modulus value of the non-zero element and other non-transmission in the uplink transmission precoding matrix.
  • the modulus values of the zero elements are different, that is, the non-constant modulus precoding matrix is used, which can better match the actual channel, thereby improving the precoding performance.
  • the LTE adopts The codebook is a constant modulus codebook.
  • the NR supports the Orthogonal Frequency Division Multiple Access (OFDM) technology, which reduces the constant model requirement of the precoding matrix, and the optimal precoding corresponding to the MIMO channel in actual MIMO transmission.
  • the matrix is non-constant. Therefore, the constant modulus codebook in the existing LTE is difficult to match the actual channel, resulting in a decrease in precoding performance. Therefore, the second embodiment of the method for indicating the transmission precoding matrix provided by the present application is to solve the technical problem of system performance degradation in the prior art.
  • OFDM Orthogonal Frequency Division Multiple Access
  • FIG. 3 is a schematic flowchart diagram of Embodiment 2 of a method for indicating a transmission precoding matrix provided by the present application.
  • the execution subject involved in this embodiment includes: a terminal device and/or a network device, and both the terminal device and the network device can be implemented by software and/or hardware.
  • the method in this embodiment includes:
  • Step S301 Determine at least one uplink transmission precoding matrix corresponding to the terminal device and the number of transmission layers.
  • the network device determines, according to the uplink channel state information corresponding to the terminal device, the at least one uplink transmission precoding matrix and the number of transmission layers corresponding to the terminal device, where the uplink transmission precoding matrix is used.
  • the method includes: at least one non-zero element and a modulus value of the non-zero element is different from a modulus value of other non-zero elements in the uplink transmission precoding matrix, that is, the uplink transmission precoding matrix is a non-constant modulus precoding matrix.
  • the network device may determine the at least one uplink transmission precoding matrix and the number of transmission layers corresponding to the terminal device according to other information, which is not limited in this embodiment.
  • the non-zero element in the uplink transmission precoding matrix in the codebook and having a non-one modulus value is
  • ⁇ m,n represents the amplitude coefficient of the mth row and the nth column element in the uplink transmission precoding matrix, 0 ⁇
  • the m is a positive integer less than or equal to the number of antenna ports
  • the n is a positive integer less than or equal to the number of transmission layers.
  • ⁇ m,n may also be equal to 0 or 1 (ie, the zero element or the 1 element in the codebook may also be expressed as ).
  • an embodiment of the present application provides a codebook corresponding to a 2-antenna port.
  • the codebook includes at least one non-constant modulus precoding matrix; the precoding matrix index is 3 and the transport layer.
  • the number of the transmission layers is equal to 1.
  • the network device determines, from the codebook, at least two uplink transmission precoding matrices corresponding to the terminal device, where different uplink transmission precoding matrices are different.
  • a subband a sum of squares of modulus values corresponding to all elements in the Kth row of the at least two uplink transmission precoding matrices, corresponding to all elements in the Lth row of the at least two uplink transmission precoding matrices
  • the sum of the squares of the modulus values is equal, and both K and L are positive integers less than or equal to the number of antenna ports, and the K is not equal to the L. For example, as shown in FIG.
  • the uplink transmission precoding matrix corresponding to subband 0 is
  • the uplink transmission precoding matrix corresponding to the subband 2 is The sum of the squares of the modulus values of all the elements in the first row of the two uplink transmission precoding matrices
  • the sum of the squares of the modulus values corresponding to all the elements in the second row of the two uplink transmission precoding matrices Equal, that is, the power and the corresponding power of different antenna ports are equal.
  • the number of transmission layers is greater than 1, a sum of squares of modulus values corresponding to all elements in the Kth row of the at least one uplink transmission precoding matrix, and an Lth of the at least one uplink transmission precoding matrix
  • the sum of the squares of the modulus values corresponding to all the elements in the row is equal, and both K and L are positive integers less than or equal to the number of antenna ports, and the K is not equal to the L.
  • the uplink transmission precoding matrix is Sum of squares of modulus values corresponding to all elements in the first row of the uplink transmission precoding matrix The sum of the squares of the modulus values corresponding to all the elements in the second row of the uplink transmission precoding matrix equal.
  • Step S302 Send transmission precoding matrix indication information and transmission layer number indication information to the terminal device.
  • the network device sends the transmission precoding matrix indication information and the transmission layer number indication information to the terminal device, where the transmission precoding matrix indication information is used to indicate the uplink transmission preamble included in the codebook.
  • the at least one uplink transmission precoding matrix in the coding matrix eg, the transmission precoding matrix indication information is used to indicate an index of the at least one uplink transmission precoding matrix
  • the transmission layer number indication information is used to indicate The number of transport layers.
  • the transmission precoding matrix indication information and the transmission layer number indication information are located in one domain of downlink control information; when non-join coding, the transmission precoding matrix indication information may be located a transmission precoding matrix indication field in the downlink control information, where the transmission layer number indication information may be located in a transmission layer number indication field in the downlink control information.
  • the transmission precoding matrix indication information and the transmission layer number indication information may also be transmitted by using other carrying modes, which is not limited in this embodiment.
  • Step S303 Receive transmission precoding matrix indication information and transmission layer number indication information from the network device.
  • the terminal device receives the transmission precoding matrix indication information and the transmission layer number indication information from the network device, where the transmission precoding matrix indication information is used to indicate the codebook. And the at least one uplink transmission precoding matrix in the uplink transmission precoding matrix, where the transmission layer number indication information is used to indicate the number of transmission layers.
  • the number of transmission layers is equal to 1, and the transmission precoding matrix indication information is used to indicate at least two uplink transmission precoding matrices in an uplink transmission precoding matrix included in the codebook.
  • Step S304 Determine the at least one uplink transmission precoding matrix according to the transmission precoding matrix indication information, the transmission layer number indication information, and the codebook.
  • the terminal device according to the transmission precoding matrix indication information (for example, the transmission precoding matrix indication information is used to indicate an index of the at least one uplink transmission precoding matrix), the number of transmission layers, and Decoding, from the codebook, the at least one uplink transmission precoding matrix that matches an index of the at least one uplink transmission precoding matrix and the number of transmission layers, so as to further according to the at least one
  • the uplink transmission precoding matrix performs preprocessing on the data to be transmitted, where the uplink transmission precoding matrix includes: at least one non-zero element and a modulus value of the non-zero element and other in the uplink transmission precoding matrix
  • the modulus values of the non-zero elements are different, that is, the codebook is a non-constant modulus codebook including at least one non-constant modulus precoding matrix.
  • the codebook is pre-configured in the terminal device and the network device, or the network device configures the codebook to the terminal by using a high layer signaling message or a physical layer signaling message. device.
  • the number of transmission layers is equal to 1, and the transmission precoding matrix indication information is used to indicate at least two uplink transmission precoding matrices in an uplink transmission precoding matrix included in the codebook (for example, the transmission The precoding matrix indication information is used to indicate an index of the at least two uplink transmission precoding matrices; wherein, the different uplink transmission precoding matrices correspond to different subbands; correspondingly, the terminal device is configured according to the at least two Determining, by the index of the uplink transmission precoding matrix, the number of transmission layers, and the codebook, the at least two uplink transmission precoding matrices, wherein all of the K rows of the at least two uplink transmission precoding matrices a sum of squares of modulus values corresponding to the elements, equal to a sum of squares of modulus values corresponding to all elements in the Lth row of the at least two uplink transmission precoding matrices, wherein the K and the L are both less than or equal to A positive integer of the number of antenna
  • the terminal device determines the at least one uplink transmission precoding matrix according to an index of the at least one uplink transmission precoding matrix, the number of transmission layers, and a codebook, where And a sum of squares of modulus values corresponding to all elements in the Kth row of the at least one uplink transmission precoding matrix, and a square of a modulus value corresponding to all elements in the Lth row of the at least one uplink transmission precoding matrix And equal, both K and L are positive integers less than or equal to the number of antenna ports, and the K is not equal to the L.
  • the non-zero element in the uplink transmission precoding matrix in the codebook and having a non-one modulus value is
  • ⁇ m,n represents the amplitude coefficient of the mth row and the nth column element in the uplink transmission precoding matrix, 0 ⁇
  • the m is a positive integer less than or equal to the number of antenna ports
  • the n is a positive integer less than or equal to the number of transmission layers.
  • the at least one uplink transmission precoding matrix and the number of transmission layers corresponding to the terminal device are determined by the network device, and the transmission precoding matrix indication information is sent to the terminal device (for indicating the uplink transmission preamble included in the codebook)
  • the at least one uplink transmission precoding matrix in the coding matrix and the transmission layer number indication information (for indicating the number of transmission layers); further, the terminal device according to the transmission precoding matrix indication information, the transport layer Determining, by the number indication information and the codebook, the at least one uplink transmission precoding matrix, where the uplink transmission precoding matrix includes: at least one non-zero element and a modulus value of the non-zero element and the uplink
  • the modulus values of other non-zero elements in the transmission precoding matrix are different.
  • the network device may further send coefficient indication information to the terminal device, where the coefficient indication information is used to indicate an element in an uplink transmission precoding matrix in the codebook.
  • the coefficient indication information includes: M-bit first coefficient indication information and/or N-bit second coefficient indication information; wherein the first coefficient indication information is used to indicate the ⁇ m, n , The second coefficient indication information is used to indicate the Both M and N are positive integers greater than zero.
  • the coefficient indication information includes: 2-bit first coefficient indication information and 2-bit second coefficient indication information, and when the first coefficient indication information corresponds to values 00, 01, 10, and 11, respectively, indicating ⁇ m , n is 0, 0.5, And one of the 1 (such as 00 indicates 0, 01 indicates 0.5, 10 indicates And 11 indicates 1); when the values corresponding to the second coefficient indication information are 00, 01, 10, and 11, respectively, It is one of 0, ⁇ /2, ⁇ , and 3 ⁇ /2 (eg, 00 indicates 0, 01 indicates ⁇ /2, 10 indicates ⁇ , and 11 indicates 3 ⁇ /2).
  • the terminal device receives the coefficient indication information from the network device, so as to determine the codebook according to the coefficient indication information.
  • the network device may configure the codebook for the terminal device in other manners, which is not limited in this embodiment of the present application.
  • the number of uplink transmission precoding matrices needs to be increased to provide more uplink beams to ensure more accurate uplink alignment.
  • the overhead of transmitting the precoding matrix indication domain is large. Therefore, the third embodiment and the fourth embodiment of the method for indicating a transmission precoding matrix provided by the present application are to solve the technical problem that the transmission precoding matrix indicates a large domain overhead in the prior art. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.
  • FIG. 4 is a schematic flowchart diagram of Embodiment 3 of a method for indicating a transmission precoding matrix provided by the present application.
  • the execution subject involved in this embodiment includes: a terminal device and/or a network device, and both the terminal device and the network device can be implemented by software and/or hardware.
  • the method in this embodiment includes:
  • Step S401 Determine at least one uplink transmission precoding matrix corresponding to the terminal device and the number of uplink transmission layers.
  • the network device determines, according to the uplink channel state information corresponding to the terminal device, at least one uplink transmission precoding matrix and the number of uplink transmission layers corresponding to the terminal device.
  • the at least one uplink transmission precoding matrix belongs to a precoding matrix in a codebook subset, where the codebook subset is a part of a codebook corresponding to the uplink transmission layer number.
  • the codebook is a preset or configured precoding matrix set (ie, a complete codebook) in a current transmission mode.
  • the network device may determine the at least one uplink transmission precoding matrix and the uplink transmission layer corresponding to the terminal device according to other information, which is not limited in this embodiment.
  • the index of each uplink transmission precoding matrix in the codebook subset is: an index that is newly re-established according to the sequence of the index of the uplink transmission precoding matrix in the codebook, for example, the codebook
  • the centralized index includes: 0, 1, 2, ..., N-2, N-1, N is the number of precoding matrices included in the codebook subset, and for example, the index in the codebook subset includes: M, M+1, M+2, ..., M+N-2, M+N-1, M+N are the number of precoding matrices included in the codebook subset, and N is the precoding included in the codebook subset
  • M is the default value.
  • the index of the precoding matrix 0 in the codebook is 0, the index of the precoding matrix 1 in the codebook is 1, the index of the precoding matrix 2 in the codebook is 2, and the precoding matrix 3, the index in the codebook is 3, assuming that the precoding matrix 1 and the precoding matrix 3 belong to the codebook subset, and the precoding matrix 0 and the precoding matrix 2 do not belong to the codebook subset, then The index of the coding matrix 1 in the codebook subset is 0 and the index of the precoding matrix 3 in the codebook subset is 1.
  • Step S402 Send downlink control information to the terminal device.
  • the network device sends downlink control information to the terminal device, where the downlink control information includes: a transmission precoding matrix indication field and a transmission layer number indication field, where the transmission precoding matrix indicates a domain And indicating an index of the at least one uplink transmission precoding matrix, where the number of transmission layer indication fields is used to indicate the number of uplink transmission layers, where the number of bits of the transmission precoding matrix indication field and the codebook subset are included
  • the number of precoding matrices is related.
  • the number of bits of the transmission precoding matrix indication field is determined by the network device according to the number of precoding matrices included in the codebook subset to ensure that the transmission precoding matrix indication field can indicate Any precoding matrix in the subset of codebooks.
  • the codebook includes 16 precoding matrices and the codebook subset includes 8 precoding matrices
  • the number of bits used to indicate the transmission precoding matrix indication field of the codebook is 4, but The number of bits of the transmission precoding matrix indication field indicating the codebook subset is 3
  • the codebook includes 8 precoding matrices and the codebook subset includes 4 precoding matrices
  • the number of bits of the transmission precoding matrix indication field indicating the codebook is 3, but the number of bits used to indicate the transmission precoding matrix indication field of the codebook subset is 2.
  • the number of bits of the transmission precoding matrix indication field is smaller than the number of bits used to indicate the transmission precoding matrix indication field of the codebook, thereby reducing the overhead of transmitting the precoding matrix indication domain.
  • the indication information may be included in the downlink control information, which is not limited in this embodiment.
  • the transmission layer number indication field and the transmission precoding matrix indication field may be merged into one of the downlink control information, which is not limited in this embodiment.
  • Step S403 Receive downlink control information from a network device.
  • the terminal device receives the downlink control information from the network device, where the downlink control information includes: the transmission precoding matrix indication domain and the transmission layer number indication domain,
  • the transmission precoding matrix indication field is used to indicate an index of at least one uplink transmission precoding matrix
  • the transport layer indication field is used to indicate an uplink transmission layer number.
  • Step S404 Determine, according to an index of the at least one uplink transmission precoding matrix, the number of transmission layers, and the codebook subset, the uplink transmission precoding matrix.
  • the terminal device determines, according to the index of the at least one uplink transmission precoding matrix, the number of transmission layers, and the codebook subset, from the codebook subset and the at least one uplink transmission pre And encoding, by the index of the coding matrix, the at least one uplink transmission precoding matrix that matches the number of transmission layers, so as to further preprocess data to be transmitted according to the at least one uplink transmission precoding matrix.
  • the at least one uplink transmission precoding matrix and the uplink transmission layer corresponding to the terminal device are determined by the network device, and the downlink control information is sent to the terminal device, where the downlink control information includes: transmission precoding a matrix indication field and a transmission layer number indication field, where the transmission precoding matrix indication field is used to indicate an index of the at least one uplink transmission precoding matrix, and the transmission layer number indication field is used to indicate the uplink transmission layer number,
  • the number of bits of the transmission precoding matrix indication field is related to the number of precoding matrices included in the codebook subset, and the codebook subset is a part of the codebook corresponding to the uplink transmission layer number; further, the The terminal device determines the uplink transmission precoding matrix according to an index of the at least one uplink transmission precoding matrix, the number of transmission layers, and the codebook subset.
  • the indication of the uplink transmission precoding matrix is implemented, and since the codebook subset is a part of the codebook corresponding to the uplink transmission layer number, the number of bits of the transmission precoding matrix indication domain is smaller than The transmission precoding matrix indicating the codebook indicates the number of bits of the domain, thereby reducing the overhead of transmitting the precoding matrix indication domain.
  • FIG. 5 is a schematic flowchart diagram of Embodiment 4 of a method for indicating a transmission precoding matrix provided by the present application. As shown in FIG. 5, based on the foregoing third embodiment, the method in this embodiment includes:
  • Step S501 Determine the codebook subset corresponding to the terminal device.
  • the network device determines the codebook subset corresponding to the terminal device, where the codebook subset is a part of the codebook corresponding to the uplink transmission layer number, optionally
  • the codebook is a preset or configured precoding matrix set (ie, a complete codebook) in the current transmission mode.
  • the network device determines, according to the uplink signal or channel sent by the terminal device, a codebook subset to be configured, where the uplink signal may be a reference signal used for uplink channel sounding, such as an uplink sounding reference signal ( Sounding Reference Signal (SRS), a reference signal for uplink demodulation, such as an uplink demodulation reference signal (DMRS), etc.
  • the channel may be a physical channel for random access, such as physical random access.
  • the codebook subset that needs to be configured is determined according to the uplink signal or the channel sent by the terminal device, which is not limited in the embodiment of the present application.
  • the codebook subset that may be used may be estimated according to the uplink signal or channel.
  • the uplink transmission precoding matrix set includes at least one precoding matrix
  • the network device measures The signal quality is better than that of other precoding matrices (not belonging to the precoding matrix in the uplink transmission precoding matrix set) for uplink transmission.
  • the signal quality includes a signal to interference and noise ratio (Signal) To the Interference plus Noise Ratio (SINR), of course, the signal quality may also include other information, which is not limited in the embodiment of the present application.
  • Step S502 Send a configuration message to the terminal device.
  • the network device sends a configuration message for indicating the codebook subset to the terminal device, so that the terminal device determines the codebook subset according to the configuration message.
  • the configuration message may be a high-level signaling message or a physical layer signaling message, which is not limited in this embodiment.
  • the configuration message includes: at least one bit, where the bit is used to indicate; whether at least one transmission precoding matrix corresponding to the bit in the codebook belongs to the codebook subset; If the value of the bit is equal to a preset value (for example, 1), the at least one transmission precoding matrix corresponding to the bit in the codebook belongs to the codebook subset; if the bit is The value of the code is not equal to the preset value (for example, the value of the bit is equal to 0), and the at least one transmission precoding matrix corresponding to the bit in the codebook does not belong to the codebook subset.
  • a preset value for example, 1
  • the configuration message includes: 3 bits, and the first bit is used to indicate a transmission precoding matrix (or precoding matrix) corresponding to an index of 0-3 in the codebook, and a second bit.
  • a transmission precoding matrix for indicating that the index is 4-7 in the codebook, and a third bit for indicating a transmission precoding matrix corresponding to an index of 8-11 in the codebook when the first The value of the bit is equal to the preset value, and the transmission precoding matrix corresponding to the index 0-3 in the codebook belongs to the codebook subset, and when the value of the second bit is not equal to The preset value represents that the transmission precoding matrix corresponding to the index 4-7 in the codebook does not belong to the codebook subset.
  • the configuration message includes: a sampling factor l and an offset ⁇ ; optionally, a formula is preset in the network device and the terminal device Wherein said Representing an index of the precoding matrix in the codebook, mod represents a remainder operation; the network device and/or the terminal device can obtain the information after determining the sampling factor 1 and the offset amount The index in the codebook Satisfy formula
  • the transmission precoding matrix belongs to the codebook subset.
  • the configuration message includes: information indicating at least one target element constituting the codebook subset (for example, assuming an element in the codebook) 0 ⁇
  • the target element refers to an element constituting a precoding matrix in the codebook subset, and the information of the target element may be ⁇ m, n and/or So that the terminal device determines that the precoding matrix containing only the target element in the codebook belongs to the codebook subset, that is, the codebook contains any elements other than the target element.
  • the precoding matrix does not belong to the codebook subset.
  • the configuration message may be further used to indicate an index of the at least one target precoding matrix in the codebook used to form the codebook subset, so that the terminal device determines the code according to the configuration message. This subset.
  • configuration message may be in other forms for indicating the codebook subset, which is not limited in the embodiment of the present application.
  • Step S503 Receive the configuration message sent by the network device.
  • the terminal device receives the configuration message sent by the network device, so as to determine the codebook subset according to the configuration message.
  • the configuration message includes: the at least one bit
  • the terminal device determines, according to the value of the at least one bit, at least one transmission pre-corresponding to the bit in the codebook. Whether the encoding matrix belongs to the codebook subset; if the value of the bit is equal to a preset value (for example, 1), the terminal device determines the at least one transmission in the codebook corresponding to the bit The precoding matrix belongs to the codebook subset.
  • the terminal device determines an index in the codebook according to the sampling factor 1 and the offset ⁇ Satisfy formula
  • the transmission precoding matrix belongs to the codebook subset.
  • the terminal device determines, according to the configuration message, that only the target is included in the codebook.
  • the precoding matrix of the elements belongs to the codebook subset.
  • the configuration message may also include other forms.
  • the terminal device may further determine the codebook subset by other forms, which is not described herein again in this embodiment.
  • the network device determines the subset of the codebook corresponding to the terminal device (the codebook subset is a part of the codebook corresponding to the number of uplink transmission layers), and The terminal device sends a configuration message for indicating the codebook subset; further, the terminal device receives the configuration message sent by the network device, to determine the codebook subset according to the configuration message. . It can be seen that the indication manner of the codebook subset is implemented, so that the terminal device determines the uplink transmission precoding matrix according to the codebook subset.
  • FIG. 6 is a schematic diagram of a device according to an embodiment of the present disclosure.
  • the device may be a terminal device 10, or may be a chip or a circuit, such as a chip or a circuit that can be disposed on the terminal device.
  • the terminal device 10 can correspond to the terminal device in the above method.
  • the device can include a processor 110 and a memory 120.
  • the memory 120 is for storing instructions for executing the instructions stored in the memory 120 to implement the steps in the method corresponding to any of the figures in FIG. 2A and FIG.
  • the device may further include an input port 140 and an output port 150. Further, the device may further include a bus system 130, wherein the processor 110, the memory 120, the input port 140, and the output port 150 may be connected by the bus system 130.
  • the processor 110 is configured to execute the instructions stored in the memory 120 to control the input port 140 to receive signals, and control the output port 150 to send signals to complete the steps of the terminal device in the above method.
  • the input port 140 and the output port 150 may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as input and output ports.
  • the memory 220 may be integrated in the processor 210 or may be provided separately from the processor 210.
  • the functions of the input port 140 and the output port 150 can be implemented by a dedicated chip through a transceiver circuit or a transceiver.
  • the processor 110 can be implemented by a dedicated processing chip, a processing circuit, a processor, or a general purpose chip.
  • the terminal device provided by the embodiment of the present application may be implemented by using a general-purpose computer.
  • the program code for the functions of the processor 110, the input port 140 and the output port 150 is stored in a memory, and the general purpose processor implements the functions of the processor 110, the input port 140 and the output port 150 by executing code in the memory.
  • FIG. 7 is a schematic structural diagram of a terminal device provided by the present application.
  • the terminal device can be adapted for use in the system shown in FIG.
  • FIG. 7 shows only the main components of the terminal device.
  • the terminal device 10 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used for processing the communication protocol and the communication data, and controlling the entire terminal device, executing the software program, and processing the data of the software program, for example, in the embodiment of the indication method for supporting the terminal device to perform the foregoing transmission precoding matrix.
  • the memory is primarily used to store software programs and data, such as the codebooks described in the above embodiments.
  • the control circuit is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals.
  • the control circuit and the antenna together can also be called an input/output port, and are mainly used for transmitting and receiving an RF signal in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are primarily used to receive user input data and output data to the user.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal, and then sends the radio frequency signal to the outside through the antenna in the form of electromagnetic waves.
  • the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.
  • FIG. 7 shows only one memory and processor for ease of illustration. In an actual terminal device, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, and the like.
  • the processor may include a baseband processor and a central processing unit, and the baseband processor is mainly used to process the communication protocol and the communication data, and the central processing unit is mainly used to control and execute the entire terminal device.
  • the processor in FIG. 7 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit can also be independent processors and interconnected by technologies such as a bus.
  • the terminal device may include a plurality of baseband processors to accommodate different network standards, and the terminal device may include a plurality of central processors to enhance its processing capabilities, and various components of the terminal devices may be connected through various buses.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the functions of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.
  • the antenna and control circuit having the transceiving function can be regarded as the transceiving unit 101 of the terminal device 10, and the processor having the processing function can be regarded as the processing unit 102 of the terminal device 10.
  • the terminal device 10 includes a transceiver unit 101 and a processing unit 102.
  • the transceiver unit can also be referred to as an input/output port, a transceiver, a transceiver, and the like.
  • the device for implementing the receiving function in the transceiver unit 101 can be regarded as a receiving unit, and the device for implementing the sending function in the transceiver unit 101 is regarded as a sending unit, that is, the transceiver unit 101 includes a receiving unit and a sending unit.
  • the receiving unit may also be referred to as a receiver, an input port, a receiving circuit, etc.
  • the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit.
  • FIG. 8 is a schematic diagram 2 of a device according to an embodiment of the present disclosure.
  • the device may be a network device 20, or may be a chip or a circuit, such as a chip or a circuit that can be disposed in a network device.
  • the device 20 corresponds to a network device in the above method.
  • the device can include a processor 210 and a memory 220.
  • the memory 220 is configured to store instructions for executing the instructions stored by the memory 220 to cause the apparatus to implement the method corresponding to any of the drawings of FIG. 2A and FIG.
  • the network may further include an input port 240 and an output port 250. Still further, the network can also include a bus system 230.
  • the processor 210, the memory 220, the input port 240 and the output port 250 are connected by a bus system 230.
  • the processor 210 is configured to execute the instructions stored in the memory 220 to control the input port 240 to receive signals, and control the output port 250 to send signals.
  • the steps of the network device in the above method are completed.
  • the input port 240 and the output port 250 may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as input and output ports.
  • the memory 220 may be integrated in the processor 210 or may be provided separately from the processor 210.
  • the functions of the input port 240 and the output port 250 can be implemented by a dedicated chip through a transceiver circuit or a transceiver.
  • the processor 210 can be implemented by a dedicated processing chip, a processing circuit, a processor, or a general purpose chip.
  • a network device provided by an embodiment of the present application may be implemented by using a general-purpose computer.
  • the program code that implements the functions of the processor 210, the input port 240 and the output port 250 is stored in a memory, and the general purpose processor implements the functions of the processor 210, the input port 240, and the output port 250 by executing code in the memory.
  • FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present application, which may be a schematic structural diagram of a base station.
  • the base station 20 includes one or more radio frequency units, such as a remote radio unit (RRU) 201 and one or more baseband units (BBUs) (also referred to as digital units, DUs) 202.
  • RRU remote radio unit
  • BBUs baseband units
  • the RRU 201 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or an input/output port or the like, which may include at least one antenna 2011 and a radio frequency unit 2012.
  • the RRU 201 is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for transmitting the signaling messages described in the foregoing embodiments to the terminal device.
  • the BBU 202 part is mainly used for performing baseband processing, controlling a base station, and the like.
  • the RRU 201 and the BBU 202 may be physically disposed together or physically separated, that is, distributed base stations.
  • the BBU 202 is a control center of a base station, and may also be referred to as a processing unit, and is mainly used to perform baseband processing functions such as channel coding, multiplexing, modulation, spread spectrum, and the like.
  • the BBU processing unit
  • the BBU can be used to control the base station to perform an operation procedure about the network device in the foregoing method embodiment.
  • the BBU 202 may be composed of one or more boards, and multiple boards may jointly support a single access standard radio access network (such as an LTE network), or may separately support different access modes of wireless. Access Network.
  • the BBU 202 also includes a memory 2021 and a processor 2022.
  • the memory 2021 is used to store necessary instructions and data.
  • the memory 2021 stores preset information, a codebook, and the like in the above embodiment.
  • the processor 2022 is configured to control a base station to perform necessary actions, for example, to control a base station to perform an operation procedure of the network device in the foregoing method embodiment.
  • the memory 2021 and the processor 2022 can serve one or more boards. That is, the memory and processor can be individually set on each board. It is also possible that multiple boards share the same memory and processor. In addition, the necessary circuits can be set on each board.
  • the embodiment of the present application further provides a communication system including the foregoing network device and one or more terminal devices.
  • the processor may be a central processing unit (“CPU"), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and dedicated integration. Circuit (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory can include read only memory and random access memory and provides instructions and data to the processor.
  • a portion of the memory may also include a non-volatile random access memory.
  • the bus system may include a power bus, a control bus, and a status signal bus in addition to the data bus.
  • a power bus may include a power bus, a control bus, and a status signal bus in addition to the data bus.
  • the various buses are labeled as bus systems in the figure.
  • 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 modules in the processor.
  • the software module 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 the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application.
  • the implementation process constitutes any limitation.
  • 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, and may be in an electrical, mechanical or other form.
  • 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 purpose of the solution of the embodiment.
  • 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 computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

本申请提供一种传输预编码矩阵的指示方法和设备。该方法包括：通过根据接收来自网络设备的下行控制信息确定上行调度的子带对应的传输预编码矩阵指示域的比特数目；其中，所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的资源对应的子带的数目有关；进一步地，根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵。可见，实现了频选调度中的上行传输预编码矩阵的指示，另外还实现了根据调度子带的数目，灵活地调整所述子带对应的传输预编码矩阵指示域的比特数目，从而可以有效地利用传输预编码指示域，提高了控制信道资源的利用率。

Description

传输预编码矩阵的指示方法和设备
本申请要求于2017年5月5日提交中国专利局、申请号为201710314190.8、申请名称为“传输预编码矩阵的指示方法和设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术，尤其涉及一种传输预编码矩阵的指示方法和设备。
背景技术
多输入多输出(Multiple Input Multiple Output,MIMO)能够通过利用更多的空间自由度进一步提高系统容量，是新一代无线接入技术(New Radio Access Technology,NR)中的关键技术之一。NR中的终端设备相较于长期演进(Long Term Evolution，LTE)中的终端设备来说，其配置了更多的天线，通常情况下终端设备需要利用上行传输预编码矩阵对需要发送的数据进行预处理，以获取波束成型增益并减少同一终端设备的不同数据流之间的干扰，从而提高系统性能。可见，如何进行上行传输预编码矩阵的指示是NR中的重要技术。
在NR中引入了频选调度后，如何进行上行传输预编码矩阵的指示是一个亟待解决的问题。
发明内容
本申请提供一种传输预编码矩阵的指示方法和设备，以期提供一种适应NR场景的上行传输预编码矩阵的指示，比如在频选调度场景中的上行传输预编码矩阵的指示，或是可以降低信令开销的上行传输预编码矩阵的指示方式。
第一方面，本申请实施例提供一种传输预编码矩阵的指示方法，包括：
接收来自网络设备的下行控制信息；所述下行控制信息包括：资源分配信息指示域、传输层数指示域以及至少一个子带对应的传输预编码矩阵指示域，所述资源分配信息指示域用于指示上行调度的资源，所述资源对应至少一个子带，所述传输层数指示域用于指示上行传输层数，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵；
确定所述子带对应的传输预编码矩阵指示域的比特数目；其中，所述子带对应的传输预编码矩阵指示域的比特数目不大于传输预编码矩阵指示域的预设总比特数目；各所述子带对应的传输预编码矩阵指示域的比特数目之和不大于所述预设总比特数目，所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的资源对应的子带的数目有关；
根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定 所述子带对应的上行传输预编码矩阵。
在一种可能的实现方式中，所述子带对应的传输预编码矩阵指示域的比特数目满足如下公式：
N＝min{floor(N Δ/N s),N max}
其中，N代表所述子带对应的传输预编码矩阵指示域的比特数目，floor()代表向下取整函数，N Δ代表所述传输预编码矩阵指示域的预设总比特数目，N s代表所述至少一个子带的数目以及N max代表传输预编码矩阵指示域的预设最大比特数目，所述至少一个子带的数目为不小于1的正整数。
在一种可能的实现方式中，所述子带对应的传输预编码矩阵指示域的比特数目等于：预设信息中与所述至少一个子带的数目相对应的传输预编码矩阵指示域的目标预设比特数目；其中，所述预设信息包括：至少一个预设子带数目与所述预设子带数目对应的传输预编码矩阵指示域的预设比特数目之间的对应关系，所述至少一个子带的数目为不小于1的正整数。
在一种可能的实现方式中，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的初始索引，所述根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵，包括：
根据所述子带对应的传输预编码矩阵指示域的比特数目和所述子带对应的传输预编码矩阵指示域的值，确定所述子带对应的上行传输预编码矩阵的初始索引；
根据所述初始索引以及初始索引与目标索引之间的对应关系，确定所述子带对应的上行传输预编码矩阵的目标索引；
根据所述目标索引、所述上行传输层数以及码本，确定所述子带对应的上行传输预编码矩阵。
在一种可能的实现方式中，所述初始索引与目标索引之间的对应关系满足以下公式或以下公式对应表格：
Figure PCTCN2018085681-appb-000001
其中，
Figure PCTCN2018085681-appb-000002
代表所述初始索引，k代表索引调整系数，Δ代表索引偏移系数，I dx代表所述目标索引，所述k为预设的数值或者所述网络设备配置的数值，所述Δ为预设的数值或者所述网络设备配置的数值。
在一种可能的实现方式中，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的索引，所述根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵，包括：
在目标码本中确定与所述子带对应的传输预编码矩阵指示域指示的索引对应的上行传输预编码矩阵，所述目标码本与所述子带对应的传输预编码矩阵指示域的比特数目和所述上行传输层数相匹配。
在一种可能的实现方式中，若采用“根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵”的上述第一种可实现方式，所述子带对应的上行传输预编码矩阵可以属于本实施例上述部分中的所述码本中；若采用“根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵”的上述第二种可实现方式，所述子带对应的上行传输预编码矩阵可以属于本实施例上述部分中的所述目标码本中。
可选地，所述子带对应的上行传输预编码矩阵中包括：至少一个非零元素且所述非零元素的模值与所述上行传输预编码矩阵中其它非零元素的模值不同，即所述子带对应的上行传输预编码矩阵为非恒模预编码矩阵。
在一种可能的实现方式中，所述码本或所述目标码本中的上行传输预编码矩阵中的非零且模值非1的元素为
Figure PCTCN2018085681-appb-000003
其中，α m,n代表所述上行传输预编码矩阵中的第m行第n列元素的幅度系数，0＜|α m,n|＜1，
Figure PCTCN2018085681-appb-000004
代表所述上行传输预编码矩阵中的第m行第n列元素的相位系数，
Figure PCTCN2018085681-appb-000005
所述m为小于或等于天线端口数的正整数，所述n为小于或等于所述上行传输层数的正整数。当然，需要说明的是，在实际应用中，α m,n也可以等于0或1(即所述码本中的零元素或者1元素也都可以表示为
Figure PCTCN2018085681-appb-000006
)。
在一种可能的实现方式中，所述上行传输层数等于1，所述资源分配信息指示域用于指示上行调度的至少两个子带，所述至少两个子带对应的上行传输预编码矩阵的第K行中所有元素对应的模值的平方之和，与所述至少两个子带对应的上行传输预编码矩阵的第L行中所有元素对应的模值的平方之和相等，所述K和所述L都为小于或等于天线端口数的正整数，且所述K不等于所述L。
在一种可能的实现方式中，所述上行传输层数大于1，所述至少一个子带对应的上行传输预编码矩阵的第K行中所有元素对应的模值的平方之和，与所述至少一个子带对应的上行传输预编码矩阵的第L行中所有元素对应的模值的平方之和相等，所述K和所述L都为小于或等于天线端口数的正整数，且所述K不等于所述L。
在一种可能的实现方式中，所述方法还包括：
接收来自所述网络设备的系数指示信息，若所述系数指示信息用于指示所述码本中的上行传输预编码矩阵中的元素
Figure PCTCN2018085681-appb-000007
的所述α m,n和/或所述
Figure PCTCN2018085681-appb-000008
则根据所述系数指示信息确定所述码本；若所述系数指示信息用于指示所述目标码本中的上行传输预编码矩阵中的元素
Figure PCTCN2018085681-appb-000009
的所述α m,n和/或所述
Figure PCTCN2018085681-appb-000010
则根据所述系数指示信息确定所述目标码本。
在一种可能的实现方式中，所述系数指示信息包括：M比特的第一系数指示信息和/或N比特的第二系数指示信息；其中，所述第一系数指示信息用于指示所述α m,n，所述第二系数指示信息用于指示所述
Figure PCTCN2018085681-appb-000011
M和N都为大于0的正整数。
第二方面，本申请实施例提供一种传输预编码矩阵的指示方法，包括：
确定终端设备上行调度的资源和至少一个子带对应的传输预编码矩阵指示域的比特数目；其中，所述资源对应至少一个子带，所述子带对应的传输预编码矩阵指示域的比特数目不大于传输预编码矩阵指示域的预设总比特数目；各所述子带对应的传输预编码矩阵指示域的比特数目之和不大于所述预设总比特数目，所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的资源对应的子带的数目有关；
向终端设备发送下行控制信息；所述下行控制信息中包括：资源分配信息指示域、传输层数指示域以及所述至少一个子带对应的传输预编码矩阵指示域，所述资源分配信息指示域用于指示上行调度的所述资源，所述传输层数指示域用于指示上行传输层数，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵。
在一种可能的实现方式中，所述子带对应的传输预编码矩阵指示域的比特数目满足如下公式：
N＝min{floor(N Δ/N s),N max}
其中，N代表所述子带对应的传输预编码矩阵指示域的比特数目，floor()代表向下取整函数，N Δ代表所述传输预编码矩阵指示域的预设总比特数目，N s代表所述至少一个子带的数目以及N max代表传输预编码矩阵指示域的预设最大比特数目，所述至少一个子带的数目为不小于1的正整数。
在一种可能的实现方式中，所述子带对应的传输预编码矩阵指示域的比特数目等于：预设信息中与所述至少一个子带的数目相对应的传输预编码矩阵指示域的目标预设比特数目；其中，所述预设信息包括：至少一个预设子带数目与所述预设子带数目对应的传输预编码矩阵指示域的预设比特数目之间的对应关系，所述至少一个子带的数目为不小于1的正整数。
在一种可能的实现方式中，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的初始索引，所述初始索引与所述子带对应的传输预编码矩阵的目标索引之间具有对应关系；或者，
所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的索引，所述索引用于指示目标码本中与所述子带对应的传输预编码矩阵指示域指示的索引对应的上行传输预编码矩阵，所述目标码本与所述子带对应的传输预编码矩阵指示域的比特数目和所述上行传输层数相匹配。
在一种可能的实现方式中，所述子带对应的上行传输预编码矩阵可以属于所述码本中或者所述目标码本中。
可选地，所述子带对应的上行传输预编码矩阵中包括：至少一个非零元素且所述非零元素的模值与所述上行传输预编码矩阵中其它非零元素的模值不同，即所述子带对应的上行传输预编码矩阵为非恒模预编码矩阵。
在一种可能的实现方式中，所述码本或所述目标码本中的上行传输预编码矩阵中的非零且模值非1的元素为
Figure PCTCN2018085681-appb-000012
其中，α m,n代表所述上行传输预编码矩阵中的第m行第n列元素的幅度系数，0＜|α m,n|＜1，
Figure PCTCN2018085681-appb-000013
代表所述上行传输预编码矩阵中的第m行第n列元素的相位系数，
Figure PCTCN2018085681-appb-000014
所述m为小于或等于天线端口数的正整数，所述n为小于或等于所述上行传输层数的正整数。当然，需要说明的是，在实际应用中，α m,n也可以等于0或1(即所述码本中的零元素或者1元素也都可以表示为
Figure PCTCN2018085681-appb-000015
)。
在一种可能的实现方式中，所述上行传输层数等于1，所述资源分配信息指示域用于指示上行调度的至少两个子带，所述至少两个子带对应的上行传输预编码矩阵的第K行中所有元素对应的模值的平方之和，与所述至少两个子带对应的上行传输预编码矩阵的第L行中所有元素对应的模值的平方之和相等，所述K和所述L都为小于或等于天线端口数的正整数，且所述K不等于所述L。
在一种可能的实现方式中，所述上行传输层数大于1，所述至少一个子带对应的上行传输预编码矩阵的第K行中所有元素对应的模值的平方之和，与所述至少一个子带对应的上行传输预编码矩阵的第L行中所有元素对应的模值的平方之和相等，所述K和所述L都为小于或等于天线端口数的正整数，且所述K不等于所述L。
在一种可能的实现方式中，向所述终端设备发送系数指示信息，所述系数指示信息用 于指示所述码本或所述目标码本中的上行传输预编码矩阵中的元素
Figure PCTCN2018085681-appb-000016
的所述α m,n和/或所述
Figure PCTCN2018085681-appb-000017
需要说明的是，在实际应用中，α m,n也可以等于0或1。
在一种可能的实现方式中，所述系数指示信息包括：M比特的第一系数指示信息和/或N比特的第二系数指示信息；其中，所述第一系数指示信息用于指示所述α m,n，所述第二系数指示信息用于指示所述
Figure PCTCN2018085681-appb-000018
M和N都为大于0的正整数。
上述第一方面和第二方面所提供的传输预编码矩阵的指示方法，通过网络设备确定终端设备上行调度的资源(所述资源对应至少一个子带)和至少一个子带对应的传输预编码矩阵指示域的比特数目，并向所述终端发送包括资源分配信息指示域、传输层数指示域以及所述至少一个子带对应的传输预编码矩阵指示域的下行控制信息；进一步地，所述终端设备根据所述资源分配信息指示域确定上行调度的所述至少一个子带，并确定所述子带对应的传输预编码矩阵指示域的比特数目(所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的资源对应子带的数目有关)，并根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵。可见，实现了频选调度中的上行传输预编码矩阵的指示，另外还实现了根据调度子带的数目，灵活地调整所述子带对应的传输预编码矩阵指示域的比特数目，从而可以有效地利用传输预编码指示域，提高了控制信道资源的利用率。
进一步地，由于所述子带对应的上行传输预编码矩阵中包括：至少一个非零元素且所述非零元素的模值与所述上行传输预编码矩阵中其它非零元素的模值不同，即采用了非恒模预编码矩阵，可以较好地匹配实际的信道，从而提高了预编码性能。
第三方面，本申请实施例提供一种传输预编码矩阵的指示方法，包括：
接收来自网络设备的下行控制信息；所述下行控制信息包括：资源分配信息指示域、传输层数指示域以及至少一个子带对应的传输预编码矩阵指示域，所述资源分配信息指示域用于指示上行调度的资源，所述资源对应至少一个子带，所述传输层数指示域用于指示上行传输层数，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵；
确定所述子带对应的传输预编码矩阵指示域的比特数目；其中，所述子带对应的传输预编码矩阵指示域的比特数目不大于传输预编码矩阵指示域的预设总比特数目；各所述子带对应的传输预编码矩阵指示域的比特数目之和不大于所述预设总比特数目，所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的资源对应的子带的数目有关；
根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵。
在一种可能的实现方式中，所述子带对应的传输预编码矩阵指示域的比特数目满足如下公式：
N＝min{floor(N Δ/N s),N max}
其中，N代表所述子带对应的传输预编码矩阵指示域的比特数目，floor()代表向下取整函数，N Δ代表所述传输预编码矩阵指示域的预设总比特数目，N s代表所述至少一个子带的数目以及N max代表传输预编码矩阵指示域的预设最大比特数目，所述至少一个子带的数目为不小于1的正整数。
在一种可能的实现方式中，所述子带对应的传输预编码矩阵指示域的比特数目等于： 预设信息中与所述至少一个子带的数目相对应的传输预编码矩阵指示域的目标预设比特数目；其中，所述预设信息包括：至少一个预设子带数目与所述预设子带数目对应的传输预编码矩阵指示域的预设比特数目之间的对应关系，所述至少一个子带的数目为不小于1的正整数。
在一种可能的实现方式中，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的初始索引，所述根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵，包括：
根据所述子带对应的传输预编码矩阵指示域的比特数目和所述子带对应的传输预编码矩阵指示域的值，确定所述子带对应的上行传输预编码矩阵的初始索引；
根据所述初始索引以及初始索引与目标索引之间的对应关系，确定所述子带对应的上行传输预编码矩阵的目标索引；
根据所述目标索引、所述上行传输层数以及码本，确定所述子带对应的上行传输预编码矩阵。
在一种可能的实现方式中，所述初始索引与目标索引之间的对应关系满足以下公式或以下公式对应表格：
Figure PCTCN2018085681-appb-000019
其中，
Figure PCTCN2018085681-appb-000020
代表所述初始索引，k代表索引调整系数，Δ代表索引偏移系数，I dx代表所述目标索引，所述k为预设的数值或者所述网络设备配置的数值，所述Δ为预设的数值或者所述网络设备配置的数值。
在一种可能的实现方式中，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的索引，所述根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵，包括：
在目标码本中确定与所述子带对应的传输预编码矩阵指示域指示的索引对应的上行传输预编码矩阵，所述目标码本与所述子带对应的传输预编码矩阵指示域的比特数目和所述上行传输层数相匹配。
第四方面，本申请实施例提供一种传输预编码矩阵的指示方法，包括：
确定终端设备上行调度的资源和至少一个子带对应的传输预编码矩阵指示域的比特数目；其中，所述资源对应至少一个子带，所述子带对应的传输预编码矩阵指示域的比特数目不大于传输预编码矩阵指示域的预设总比特数目；各所述子带对应的传输预编码矩阵指示域的比特数目之和不大于所述预设总比特数目，所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的资源对应的子带的数目有关；
向终端设备发送下行控制信息；所述下行控制信息中包括：资源分配信息指示域、传输层数指示域以及所述至少一个子带对应的传输预编码矩阵指示域，所述资源分配信息指示域用于指示上行调度的所述资源，所述传输层数指示域用于指示上行传输层数，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵。
在一种可能的实现方式中，所述子带对应的传输预编码矩阵指示域的比特数目满足如下公式：
N＝min{floor(N Δ/N s),N max}
其中，N代表所述子带对应的传输预编码矩阵指示域的比特数目，floor()代表向下 取整函数，N Δ代表所述传输预编码矩阵指示域的预设总比特数目，N s代表所述至少一个子带的数目以及N max代表传输预编码矩阵指示域的预设最大比特数目，所述至少一个子带的数目为不小于1的正整数。
在一种可能的实现方式中，所述子带对应的传输预编码矩阵指示域的比特数目等于：预设信息中与所述至少一个子带的数目相对应的传输预编码矩阵指示域的目标预设比特数目；其中，所述预设信息包括：至少一个预设子带数目与所述预设子带数目对应的传输预编码矩阵指示域的预设比特数目之间的对应关系，所述至少一个子带的数目为不小于1的正整数。
在一种可能的实现方式中，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的初始索引，所述初始索引与所述子带对应的传输预编码矩阵的目标索引之间具有对应关系；或者，
所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的索引，所述索引用于指示目标码本中与所述子带对应的传输预编码矩阵指示域指示的索引对应的上行传输预编码矩阵，所述目标码本与所述子带对应的传输预编码矩阵指示域的比特数目和所述上行传输层数相匹配。
上述第三方面和第四方面所提供的传输预编码矩阵的指示方法，通过网络设备确定终端设备上行调度的资源(所述资源对应至少一个子带)和至少一个子带对应的传输预编码矩阵指示域的比特数目，并向所述终端发送包括资源分配信息指示域、传输层数指示域以及所述至少一个子带对应的传输预编码矩阵指示域的下行控制信息；进一步地，所述终端设备根据所述资源分配信息指示域确定上行调度的所述至少一个子带，并确定所述子带对应的传输预编码矩阵指示域的比特数目(所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的资源对应子带的数目有关)，并根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵。可见，实现了频选调度中的上行传输预编码矩阵的指示，另外还实现了根据调度子带的数目，灵活地调整所述子带对应的传输预编码矩阵指示域的比特数目，从而可以有效地利用传输预编码指示域，提高了控制信道资源的利用率。
第五方面，本申请实施例提供一种传输预编码矩阵的指示方法，包括：
接收来自网络设备的传输预编码矩阵指示信息和传输层数指示信息；其中，所述传输预编码矩阵指示信息用于指示码本中包括的上行传输预编码矩阵中的至少一个上行传输预编码矩阵，所述传输层数指示信息用于指示传输层数；
根据所述传输预编码矩阵指示信息、所述传输层数指示信息以及所述码本，确定所述至少一个上行传输预编码矩阵；其中，所述上行传输预编码矩阵中包括：至少一个非零元素且所述非零元素的模值与所述上行传输预编码矩阵中其它非零元素的模值不同。
在一种可能的实现方式中，所述传输层数等于1，所述传输预编码矩阵指示信息用于指示所述码本中包括的上行传输预编码矩阵中的至少两个上行传输预编码矩阵；其中，不同所述上行传输预编码矩阵对应不同的子带，所述至少两个上行传输预编码矩阵的第K行中所有元素对应的模值的平方之和，与所述至少两个上行传输预编码矩阵的第L行中所有元素对应的模值的平方之和相等，所述K和所述L都为小于或等于天线端口数的正整数，且所述K不等于所述L。
在一种可能的实现方式中，所述传输层数大于1，所述至少一个上行传输预编码矩阵的第K行中所有元素对应的模值的平方之和，与所述至少一个上行传输预编码矩阵的第L行中所有元素对应的模值的平方之和相等，所述K和所述L都为小于或等于天线端口数的正整数，且所述K不等于所述L。
在一种可能的实现方式中，所述码本中的上行传输预编码矩阵中的非零且模值非1的元素为
Figure PCTCN2018085681-appb-000021
其中，α m,n代表所述上行传输预编码矩阵中的第m行第n列元素的幅度系数，0＜|α m,n|＜1，
Figure PCTCN2018085681-appb-000022
代表所述上行传输预编码矩阵中的第m行第n列元素的相位系数，
Figure PCTCN2018085681-appb-000023
所述m为小于或等于天线端口数的正整数，所述n为小于或等于所述传输层数的正整数。
在一种可能的实现方式中，所述方法还包括：
接收来自所述网络设备的系数指示信息，所述系数指示信息用于指示所述码本中的上行传输预编码矩阵中的元素
Figure PCTCN2018085681-appb-000024
的所述α m,n和/或所述
Figure PCTCN2018085681-appb-000025
在一种可能的实现方式中，所述系数指示信息包括：M比特的第一系数指示信息和/或N比特的第二系数指示信息；其中，所述第一系数指示信息用于指示所述α m,n，所述第二系数指示信息用于指示所述
Figure PCTCN2018085681-appb-000026
M和N都为大于0的正整数。
第六方面，本申请实施例提供一种传输预编码矩阵的指示方法，包括：
确定终端设备对应的至少一个上行传输预编码矩阵以及传输层数；其中，所述上行传输预编码矩阵中包括：至少一个非零元素且所述非零元素的模值与所述上行传输预编码矩阵中其它非零元素的模值不同；
向所述终端设备发送传输预编码矩阵指示信息和传输层数指示信息；其中，所述传输预编码矩阵指示信息用于指示码本中包括的上行传输预编码矩阵中的所述至少一个上行传输预编码矩阵，所述传输层数指示信息用于指示传输层数。
在一种可能的实现方式中，所述传输层数等于1，所述确定终端设备对应的至少一个上行传输预编码矩阵，包括：
确定所述终端设备对应的至少两个所述上行传输预编码矩阵；其中，不同所述上行传输预编码矩阵对应不同的子带，所述至少两个上行传输预编码矩阵的第K行中所有元素对应的模值的平方之和，与所述至少两个上行传输预编码矩阵的第L行中所有元素对应的模值的平方之和相等，所述K和所述L都为小于或等于天线端口数的正整数，且所述K不等于所述L。
在一种可能的实现方式中，所述传输层数大于1，所述至少一个上行传输预编码矩阵的第K行中所有元素对应的模值的平方之和，与所述至少一个上行传输预编码矩阵的第L行中所有元素对应的模值的平方之和相等，所述K和所述L都为小于或等于天线端口数的正整数，且所述K不等于所述L。
在一种可能的实现方式中，所述码本中的上行传输预编码矩阵中的任一上行传输预编码矩阵中的非零且模值非1的元素为
Figure PCTCN2018085681-appb-000027
其中，α m,n代表所述上行传输预编码矩阵中的第m行第n列元素的幅度系数， 0＜|α m,n|＜1，
Figure PCTCN2018085681-appb-000028
代表所述上行传输预编码矩阵中的第m行第n列元素的相位系数，
Figure PCTCN2018085681-appb-000029
所述m为小于或等于天线端口数的正整数，所述n为小于或等于所述传输层数的正整数。
在一种可能的实现方式中，所述方法还包括：
向所述终端设备发送系数指示信息，所述系数指示信息用于指示所述码本中的上行传输预编码矩阵中的元素
Figure PCTCN2018085681-appb-000030
的所述α m,n和/或所述
Figure PCTCN2018085681-appb-000031
在一种可能的实现方式中，所述系数指示信息包括：M比特的第一系数指示信息和/或N比特的第二系数指示信息；其中，所述第一系数指示信息用于指示所述α m,n，所述第二系数指示信息用于指示所述
Figure PCTCN2018085681-appb-000032
M和N都为大于0的正整数。
上述第五方面和第六方面所提供的传输预编码矩阵的指示方法，通过网络设备确定终端设备对应的至少一个上行传输预编码矩阵以及传输层数，并向所述终端设备发送传输预编码矩阵指示信息(用于指示码本中包括的上行传输预编码矩阵中的所述至少一个上行传输预编码矩阵)和传输层数指示信息(用于指示传输层数)；进一步地，所述终端设备根据所述传输预编码矩阵指示信息、所述传输层数指示信息以及所述码本，确定所述至少一个上行传输预编码矩阵；其中，所述上行传输预编码矩阵中包括：至少一个非零元素且所述非零元素的模值与所述上行传输预编码矩阵中其它非零元素的模值不同。可见，实现了上行传输预编码矩阵的指示，另外由于采用非恒模预编码矩阵，可以较好地匹配实际的信道，从而提高了预编码性能。
第七方面，本申请实施例提供一种传输预编码矩阵的指示方法，包括：
接收来自网络设备的下行控制信息；其中，所述下行控制信息中包括：传输预编码矩阵指示域以及传输层数指示域，所述传输预编码矩阵指示域用于指示至少一个上行传输预编码矩阵的索引，所述传输层数指示域用于指示上行传输层数；
根据所述至少一个上行传输预编码矩阵的索引、所述传输层数以及码本子集，确定所述上行传输预编码矩阵；其中，所述码本子集为所述上行传输层数对应的码本中的一部分。
在一种可能的实现方式中，所述码本子集中各上行传输预编码矩阵的索引为：按照所述码本中的所述各上行传输预编码矩阵的先后索引顺序依次重新建立的索引。
在一种可能的实现方式中，所述方法还包括：
接收所述网络设备发送的配置消息，所述配置消息用于指示所述码本子集，其中，所述配置消息可以为高层信令消息或者物理层信令消息。
在一种可能的实现方式中，所述配置消息包括：至少一个比特位，所述比特位用于指示：所述码本中与所述比特位对应的至少一个传输预编码矩阵是否属于所述码本子集；若所述比特位的数值等于预设数值，则所述码本中与所述比特位对应的所述至少一个传输预编码矩阵属于所述码本子集。
在一种可能的实现方式中，所述配置消息包括：采样因子l和偏移量Λ；所述码本中的索引
Figure PCTCN2018085681-appb-000033
满足公式
Figure PCTCN2018085681-appb-000034
的传输预编码矩阵属于所述码本子集；其中，所述
Figure PCTCN2018085681-appb-000035
代表所述码本中传输预编码矩阵的索引，mod代表取余运算。
第八方面，本申请实施例提供一种传输预编码矩阵的指示方法，包括：
确定终端设备对应的至少一个上行传输预编码矩阵以及上行传输层数；
向所述终端设备发送下行控制信息；其中，所述下行控制信息包括：传输预编码矩阵指示域以及传输层数指示域，所述传输预编码矩阵指示域用于指示所述至少一个上行传输预编码矩阵的索引，所述传输层数指示域用于指示所述上行传输层数，所述传输预编码矩阵指示域的比特数目与码本子集中包括的预编码矩阵的数目有关，所述码本子集为所述上行传输层数对应的码本中的一部分。
在一种可能的实现方式中，所述方法还包括：
确定所述终端设备对应的所述码本子集；
向所述终端设备发送配置消息，所述配置消息用于指示所述码本子集，其中，所述配置消息可以为高层信令消息或者物理层信令消息。
在一种可能的实现方式中，所述码本子集中各上行传输预编码矩阵的索引为：按照所述码本中的所述各上行传输预编码矩阵的先后索引顺序依次重新建立的索引。
在一种可能的实现方式中，所述配置消息包括：至少一个比特位，所述比特位用于指示；所述码本中与所述比特位对应的至少一个传输预编码矩阵是否属于所述码本子集；若所述比特位的数值等于预设数值，则所述码本中与所述比特位对应的所述至少一个传输预编码矩阵属于所述码本子集。
在一种可能的实现方式中，所述配置消息包括：采样因子l和偏移量Λ；所述码本中的索引
Figure PCTCN2018085681-appb-000036
满足公式
Figure PCTCN2018085681-appb-000037
的传输预编码矩阵属于所述码本子集；其中，所述
Figure PCTCN2018085681-appb-000038
代表所述码本中传输预编码矩阵的索引，mod代表取余运算。
上述第七方面和第八方面所提供的传输预编码矩阵的指示方法，通过网络设备确定终端设备对应的至少一个上行传输预编码矩阵以及上行传输层数，并向所述终端设备发送下行控制信息；其中，所述下行控制信息中包括：传输预编码矩阵指示域以及传输层数指示域，所述传输预编码矩阵指示域用于指示所述至少一个上行传输预编码矩阵的索引，所述传输层数指示域用于指示所述上行传输层数，所述传输预编码矩阵指示域的比特数目与码本子集中包括的预编码矩阵的数目有关，所述码本子集为所述上行传输层数对应的码本中的一部分；进一步地，所述终端设备根据所述至少一个上行传输预编码矩阵的索引、所述传输层数以及所述码本子集，确定所述上行传输预编码矩阵。可见，实现了上行传输预编码矩阵的指示，另外由于所述码本子集为所述上行传输层数对应的码本中的一部分，因此，所述传输预编码矩阵指示域的比特数目小于用于指示所述码本的传输预编码矩阵指示域的比特数目，从而减少了传输预编码矩阵指示域的开销。
第九方面，本申请实施例提供一种设备，包括：处理器和存储器；
其中，所述存储器用于存储指令，所述处理器用于执行所述存储器存储的指令，当所述处理器执行所述存储器存储的指令时，所述设备用于完成如上述第一方面、第三方面、第五方面、第七方面中任一方面所描述的任意一种方法。
可选的，所述设备还可以包括输入输出口。
可选的，所述设备可以为终端设备，或可被设置于终端设备内的芯片。
第十方面，本申请实施例提供一种设备，包括：处理器和存储器；
其中，所述存储器用于存储指令，所述处理器用于执行所述存储器存储的指令，当所述处理器执行所述存储器存储的指令时，所述设备用于完成如上述第二方面、第四方面、第六方面、第八方面中任一方面所描述的任意一种方法。
可选的，所述设备还可以包括输入输出口。
可选的，所述设备可以为网络设备，或可被设置于网络设备内的芯片。
第十一方面，本申请实施例提供一种传输预编码矩阵的装置，包括一些模块，用于实现前述终端设备所涉及的任意一种方法。具体模块可以和各方法步骤相对应，在此不予赘述。
第十二方面，本申请实施例提供一种传输预编码矩阵的装置，包括一些模块，用于实现前述网络设备所涉及的任意一种方法。具体模块可以和各方法步骤相对应，在此不予赘述。
第十三方面，还提供一种计算机存储介质，用于存储一些指令，这些指令被执行时，可以完成前述终端设备或网络设备所涉及的任意一种方法。
第十四方面，还提供一种通信系统，包括前述提供的终端设备和网络设备。
相较于现有技术，本申请提供的信息的传输预编码矩阵的指示方法和设备，通过网络设备确定终端设备上行调度的资源(所述资源对应至少一个子带)和至少一个子带对应的传输预编码矩阵指示域的比特数目，并向所述终端发送包括资源分配信息指示域、传输层数指示域以及所述至少一个子带对应的传输预编码矩阵指示域的下行控制信息；进一步地，所述终端设备根据所述资源分配信息指示域确定上行调度的所述至少一个子带，并确定所述子带对应的传输预编码矩阵指示域的比特数目(所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的资源对应子带的数目有关)，并根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵。可见，实现了频选调度中的上行传输预编码矩阵的指示，另外还实现了根据调度子带的数目，灵活地调整所述子带对应的传输预编码矩阵指示域的比特数目，从而可以有效地利用传输预编码指示域，提高了控制信道资源的利用率。
可选地，本申请实施例中所涉及的子带是指预定义或者配置的使用相同预编码矩阵进行预编码的物理无线资源块组(Precoding Resource block Group，PRG)，即在一个子带的所有用于该终端设备进行数据传输的物理资源块(Physical resource block)使用相同的上行传输预编码矩阵进行预编码。
可选地，本申请实施例中涉及的码本、目标码本、或者码本子集等中都包含有至少一个预编码矩阵(或者称之为传输预编码矩阵、或者上行传输预编码矩阵等)。
附图说明
图1为本申请提供的系统网络架构图；
图2A为本申请提供的传输预编码矩阵的指示方法实施例一的流程示意图；
图2B为不同子带对应的上行传输预编码矩阵的示意图；
图3为本申请提供的传输预编码矩阵的指示方法实施例二的流程示意图；
图4为本申请提供的传输预编码矩阵的指示方法实施例三的流程示意图；
图5为本申请提供的传输预编码矩阵的指示方法实施例四的流程示意图；
图6为本申请实施例提供的设备的示意图一；
图7为本申请提供的一种终端设备的结构示意图；
图8为本申请实施例提供的设备的示意图二；
图9为本申请实施例提供的一种网络设备的结构示意图。
具体实施方式
本申请提供的传输预编码矩阵的指示方法和设备，可以适用于图1所示的系统架构图。如图1所示，该系统架构包括：网络设备和至少一个终端设备。针对图1所示的系统架构，本申请提供的传输预编码矩阵的指示方法，可以适用于任一终端设备在NR中进行上行预编码传输的应用场景，当然，还可以适用于其它应用场景，本申请实施例对此并不作限制。
通常情况下，终端设备进行上行传输预编码所需要的传输预编码矩阵指示(Transmission precoding matrix indicator，TPMI)信息可以通过网络设备的下行控制信息(Downlink Control Information,DCI)获取，也可以通过上下行信道互易性获取，从而使得终端设备能够根据TPMI信息指示的上行传输预编码矩阵进行上行数据传输。其中，TPMI信息对应的数值等于码本中的预编码矩阵索引。
通常，对于每个秩(等于传输层数)，系统会设计一定数量的预编码矩阵来代表量化的信道或者信道对应的方向向量，所设计的这些预编码矩阵构成码本。码本中的每个预编码矩阵都对应一个预编码矩阵索引，通常预编码矩阵索引与相应的TPMI有对应关系。需要说明的是，所述一个预编码矩阵索引可以由1个TPMI单独指示或者多个TPMI联合指示。需要说明的是，码本可以是预定义好的，网络设备和终端设备都会存储相应的码本，并且对码本中每个预编码矩阵、预编码矩阵索引和TPMI之间的对应关系的理解是一致的。当网络设备根据估计的上行信道，从所定义的码本中选出一个预编码矩阵并确定其预编码矩阵索引后，只需要把选出的预编码矩阵对应的预编码矩阵索引(或TPMI)通过下行信令(例如物理层信令DCI等)告知终端设备即可，终端设备根据网络设备下发的信令即可确定具体的预编码矩阵。
上述图1所示的网络设备，可以是指接入网中在空中接口上通过至少一个扇区与无线终端通信的设备，可选的，该网络设备可用于将收到的空中帧与网际协议(Internet Protocol，IP)分组进行相互转换，作为无线终端与接入网的其余部分之间的路由器，其中接入网的其余部分可包括(IP)网络。可选的，该网络设备还可协调对空中接口的属性管理。可选的，上述网络设备可以是基站，该基站可以是WCDMA中的基站(NodeB)，还可以是LTE中的演进型基站(eNodeB或eNB或e-NodeB，evolved Node B)，还可以是NR中的发射接收点(Transmission Reception Point，简称TRP)，gNB，或，TP(transmission point，传输点)，本申请并不限定。
上述图1所示的终端设备，可以为用户设备(User Equipment，UE)，其是一种向用户提供语音和/或数据连通性的设备，例如，具有无线连接功能的手持式设备、车载设备等。可选的，该终端设备可以为具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。并且，该终端设备还可以经无线接入网(例如，RAN，Radio Access Network)与一个或多个核心网进行通信，例如该终端设备具体可以是移动终端，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，该具有移动终端的计算机可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们可以与核心网进行语 音和/或数据的交互。
可以理解，本申请实施例中出现的“至少一个”是指“一个”或者“一个以上”。
另外，本申请不仅可以适用于NR，也适用于通用移动通信系统(Universal Mobile Telecommunications System，UMTS)系统、CDMA系统、无线局域网(Wireless Local Area Network，WLAN)、LTE等无线通信系统等。
在NR中引入了频选调度后，现有技术中通常会固定下行控制信道尺寸(即传输预编码指示域是固定的)，可能会导致未调度子带对应的传输预编码指示域不能得到有效的利用，从而导致控制信道资源的浪费。因此，本申请提供的传输预编码矩阵的指示方法实施例一，旨在解决现有技术中控制信道资源浪费的技术问题。
下面以具体地实施例对本申请的技术方案以及本申请的技术方案如何解决上述技术问题进行详细说明。下面这几个具体的实施例可以相互结合，对于相同或相似的概念或过程可能在某些实施例中不再赘述。
图2A为本申请提供的传输预编码矩阵的指示方法实施例一的流程示意图。本实施例中涉及的执行主体包括：终端设备和/或网络设备，该终端设备和网络设备都可以通过软件和/或硬件实现。如图2A所示，本实施例的方法包括：
步骤S201、确定终端设备上行调度的资源和至少一个所述子带对应的传输预编码矩阵指示域的比特数目。
本步骤中，网络设备根据当前网络中上行负载状况以及终端设备的上行信道状态信息确定终端设备上行调度的资源，可选地，若所述资源为PRB，则根据PRB与子带之间的对应关系确定出上行调度的所述PRB对应的至少一个子带；或者，若所述资源为子带，则直接确定所述终端上行调度的至少一个子带；进一步地，根据所述至少一个子带的数目确定至少一个所述子带对应的传输预编码矩阵指示域的比特数目；其中，任一所述子带对应的传输预编码矩阵指示域的比特数目不大于传输预编码矩阵指示域的预设总比特数目；各所述子带对应的传输预编码矩阵指示域的比特数目之和不大于所述预设总比特数目，任一所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的资源对应的子带的数目有关，从而实现了根据调度子带的数目，灵活地调整所述子带对应的传输预编码矩阵指示域的比特数目。可选地，所述网络设备和所述终端设备都预先获知了所述传输预编码矩阵指示域的预设总比特数目。当然，所述网络设备还可根据其他信息确定所述终端设备上行调度的资源，本实施例中对此并不作限制。
可选地，本申请实施例中所涉及的子带是指预定义或者配置的使用相同预编码矩阵进行预编码的物理无线资源块组(Precoding Resource block Group，PRG)，即在一个子带的所有用于该终端设备进行数据传输的物理资源块(Physical resource block)使用相同的上行传输预编码矩阵进行预编码。举例而言，子带可以为多个连续的PRB，这些连续的PRB使用相同的预编码矩阵进行预编码，从而保证接收侧可以更为精确的进行信道估计。需说明的是，本申请中，网络设备上行调度的单元可以是PRB或者是多个PRB按照预设关系对应的集合，本申请不做限制。可选地，本申请的子带是指网络设备上行调度的PRB按照PRB与子带之间的关系、确定的上行调度的PRB所属的子带，本申请PRB与子带之间的关系不做限定。例如调度了两个PRB，分别对应PRB1和PRB10，如果子带定义为连续5个PRB、且该5个连续的PRB中最小PRB索引能被5整除，则这两个PRB分属两 个子带。需要使用独立的TPMI域进行传输预编码矩阵指示。
可选地，任一所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的子带的数目有关的可实现方式，至少包括如下几种：
第一种可实现方式：任一所述子带对应的传输预编码矩阵指示域的比特数目满足如下公式：
N＝min{floor(N Δ/N s),N max}
其中，N代表所述子带对应的传输预编码矩阵指示域的比特数目，floor()代表向下取整函数，N Δ代表所述传输预编码矩阵指示域的预设总比特数目，N s代表所述至少一个子带的数目以及N max代表传输预编码矩阵指示域的预设最大比特数目，所述至少一个子带的数目为不小于1的正整数。
本种可实现方式中，所述网络设备根据公式N＝min{floor(N Δ/N s),N max}确定所述子带对应的传输预编码矩阵指示域的比特数目，当然，还可根据所述公式N＝min{floor(N Δ/N s),N max}的其它等效或变形公式确定所述N，本实施例中对此并不做作限制。例如，假设带宽为20M，包括10个子带，传输预编码矩阵指示域的预设总比特数目N Δ为20比特，传输预编码矩阵指示域的预设最大比特数目N max为6比特；当调度的子带的数目N s为10时，则根据所述公式N＝min{floor(N Δ/N s),N max}确定每个子带对应的传输预编码矩阵指示域的比特数目N为2；当调度的子带的数目N s为5时，则根据所述公式N＝min{floor(N Δ/N s),N max}确定每个子带对应的传输预编码矩阵指示域的比特数目N为4。
第二种可实现方式：所述子带对应的传输预编码矩阵指示域的比特数目等于：预设信息中与所述至少一个子带的数目相对应的传输预编码矩阵指示域的目标预设比特数目；其中，所述预设信息包括：至少一个预设子带数目与所述预设子带数目对应的传输预编码矩阵指示域的预设比特数目之间的对应关系，所述至少一个子带的数目为不小于1的正整数。
本种可实现方式中，所述网络设备根据所述至少一个子带的数目以及预设信息，确定所述子带对应的传输预编码矩阵指示域的比特数目，其中，所述子带对应的传输预编码矩阵指示域的比特数目等于所述预设信息中与所述至少一个子带的数目相对应的传输预编码矩阵指示域的目标预设比特数目。可选地，所述网络设备和所述终端设备中都预设有所述预设信息，或者，可选地，所述终端设备中的预设信息也可以为所述网络设备通过高层信令消息配置给所述终端设备的，所述高层信令消息可以为无线资源控制(Radio Resource Control，RRC)消息或者媒体接入控制元素(Media Access Control Control Element，MAC CE)等。可选地，所述预设信息可以按照表格的形式(如表1所示，表1为预设信息的表格，其中，B 1<B 2<…<B M，n 1>＝n 2>＝…>＝n M)存储在所述网络设备和所述终端设备中，当然，还可以按照其它格式存储，本实施例中对此并不作限制。
表1 预设信息的表格
Figure PCTCN2018085681-appb-000039
Figure PCTCN2018085681-appb-000040
当然，任一所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的子带的数目有关的可实现方式，还可包括其它的可实现方式，本申请实施例中对此并不作限制。
步骤S202、向终端设备发送下行控制信息。
本步骤中，所述网络设备向终端设备发送下行控制信息；其中，所述下行控制信息中包括：资源分配信息指示域、传输层数指示域以及所述至少一个子带对应的传输预编码矩阵指示域，所述资源分配信息指示域用于指示上行调度的所述资源，所述传输层数指示域用于指示所述网络设备确定的所述终端设备对应的上行传输层数，任一所述子带对应的传输预编码矩阵指示域用于指示所述网络设备确定的所述子带对应的上行传输预编码矩阵。可选地，所述网络设备确定所述终端设备对应的所述上行传输层数和至少一个所述上行传输预编码矩阵的方式，可参见现有技术中的确定方式，本申请实施例中对此并不作限制。当然，所述下行控制信息中还可以包括其它指示域，本实施例中对此并不作限制。
可选地，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的初始索引，所述初始索引与所述子带对应的传输预编码矩阵的目标索引之间具有对应关系；或者，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的索引，所述索引用于指示目标码本中与所述子带对应的传输预编码矩阵指示域指示的索引对应的上行传输预编码矩阵，所述目标码本与所述子带对应的传输预编码矩阵指示域的比特数目和所述上行传输层数相匹配。
需要说明的是，当联合编码时，所述传输层数指示域以及所述至少一个子带对应的传输预编码矩阵指示域可以合并为所述下行控制信息中的一个域，本申请实施例中对此并不作限制。
步骤S203、接收来自网络设备的下行控制信息。
本步骤中，所述终端设备接收来自所述网络设备的所述下行控制信息；其中，所述下行控制信息中包括：所述资源分配信息指示域、所述传输层数指示域以及所述至少一个子带对应的传输预编码矩阵指示域，所述资源分配信息指示域用于指示上行调度的所述资源，所述资源对应至少一个子带，所述传输层数指示域用于指示所述上行传输层数，任一所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵。
可选地，所述终端设备根据预设子带与传输预编码矩阵指示域之间的对应关系，确定每个子带对应的传输预编码矩阵指示域；当然，所述终端设备也可根据其他方式确定每个子带对应的传输预编码矩阵指示域，本申请实施例中对此并不作限制。
步骤S204、确定所述子带对应的传输预编码矩阵指示域的比特数目。
本步骤中，若所述资源分配信息指示域用于指示的上行调度的资源为PRB，则所述终端设备根据PRB与子带之间的对应关系确定出上行调度的所述PRB对应的至少一个子带；或者，若所述资源分配信息指示域用于指示的上行调度的所述资源为子带，则所述终端设备直接确定上行调度的至少一个子带；当然，若所述资源分配信息指示域用于指示的上行调度的资源为其它信息时，所述终端设备可以根据其他方式确定上行调度的至少一个子带，本实施例中对此并不作限制。
进一步地，所述终端设备根据上行调度的所述至少一个子带的数目确定所述至少一个 子带对应的传输预编码矩阵指示域的比特数目；其中，任一所述子带对应的传输预编码矩阵指示域的比特数目不大于所述传输预编码矩阵指示域的预设总比特数目；各所述子带对应的传输预编码矩阵指示域的比特数目之和不大于所述预设总比特数目，任一所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的资源对应的子带的数目有关。
可选地，任一所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的子带的数目有关的可实现方式，至少包括如下几种：
第一种可实现方式：任一所述子带对应的传输预编码矩阵指示域的比特数目满足如下公式：
N＝min{floor(N Δ/N s),N max}
其中，N代表所述子带对应的传输预编码矩阵指示域的比特数目，floor()代表向下取整函数，N Δ代表所述传输预编码矩阵指示域的预设总比特数目，N s代表所述至少一个子带的数目以及N max代表传输预编码矩阵指示域的预设最大比特数目，所述至少一个子带的数目为不小于1的正整数。
本种可实现方式中，所述终端设备根据所述公式N＝min{floor(N Δ/N s),N max}确定所述子带对应的传输预编码矩阵指示域的比特数目，当然，还可根据所述公式N＝min{floor(N Δ/N s),N max}的其它等效或变形公式确定所述N，本实施例中对此并不做作限制。
第二种可实现方式，所述子带对应的传输预编码矩阵指示域的比特数目等于：所述预设信息中与所述至少一个子带的数目相对应的传输预编码矩阵指示域的目标预设比特数目；其中，所述预设信息包括：至少一个预设子带数目与所述预设子带数目对应的传输预编码矩阵指示域的预设比特数目之间的对应关系，所述至少一个子带的数目为不小于1的正整数。
本种可实现方式中，所述终端设备根据所述至少一个子带的数目以及所述预设信息，确定所述子带对应的传输预编码矩阵指示域的比特数目，其中，所述子带对应的传输预编码矩阵指示域的比特数目等于所述预设信息中与所述至少一个子带的数目相对应的传输预编码矩阵指示域的目标预设比特数目。
当然，任一所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的子带的数目有关的可实现方式，还可包括其它的可实现方式，本申请实施例中对此并不作限制。
步骤S205、根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵。
本步骤中，所述终端设备根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵，以便进一步根据所述子带对应的上行传输预编码矩阵对需要发送的数据进行预处理。
可选地，根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵的可实现方式，至少包括如下几种方式：
第一种可实现方式：所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的初始索引，根据所述子带对应的传输预编码矩阵指示域的比特数目和所述子带对应的传输预编码矩阵指示域的值，确定所述子带对应的上行传输预编码矩阵的初始索引；根据所述初始索引以及初始索引与目标索引之间的对应关系，确定调整后的 所述子带对应的上行传输预编码矩阵的目标索引；根据所述目标索引、所述上行传输层数以及码本，确定所述子带对应的上行传输预编码矩阵。
本种可实现方式中，若所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的初始索引，所述终端设备根据所述子带对应的传输预编码矩阵指示域的比特数目确定所述子带对应的传输预编码矩阵指示域的值，进而确定所述子带对应的上行传输预编码矩阵的初始索引(等于所述子带对应的传输预编码矩阵指示域的值)。进一步地，所述终端设备根据所述初始索引以及初始索引与目标索引之间的对应关系，确定调整后的所述子带对应的上行传输预编码矩阵的目标索引，其中，所述初始索引与目标索引之间的对应关系可以为预设的对应关系，或者可以为所述网络设备通过高层信令消息或物理层信令消息配置的对应关系。进一步地，所述终端设备根据所述目标索引、所述上行传输层数以及码本，从所述码本中确定出与所述目标索引和所述传输层数相匹配的目标预编码矩阵作为所述子带对应的上行传输预编码矩阵。可选地，所述终端设备和所述网络设备中都预设有所述码本，或者，所述网络设备通过高层信令消息或物理层信令消息将所述码本配置给所述终端设备。
可选地，所述初始索引与目标索引之间的对应关系满足以下公式或以下公式对应表格：
Figure PCTCN2018085681-appb-000041
其中，
Figure PCTCN2018085681-appb-000042
代表所述初始索引，k代表索引调整系数，Δ代表索引偏移系数，I dx代表所述目标索引，所述k为预设的数值或者所述网络设备配置的数值，所述Δ为预设的数值或者所述网络设备配置的数值。当然，所述初始索引与目标索引之间的对应关系还可满足所述公式
Figure PCTCN2018085681-appb-000043
的其它等效或变形公式，本申请实施例中对此并不作限制。
第二种可实现方式，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的索引，在目标码本中确定与所述子带对应的传输预编码矩阵指示域指示的索引对应的上行传输预编码矩阵，所述目标码本与所述子带对应的传输预编码矩阵指示域的比特数目和所述上行传输层数相匹配。
本种可实现方式中，若所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的索引，所述终端设备从码本集合中确定出与所述子带对应的传输预编码矩阵指示域的比特数目和所述上行传输层数相匹配的目标码本，其中，所述码本集合中包括：至少一个码本，不同码本对应的传输预编码矩阵指示域的比特数目和/或所述上行传输层数不同；例如，对应一个上行传输层数，所述码本集合中包括多种码本，其中，不同码本对应的传输预编码矩阵指示域的比特数目不同；又例如，对应一个传输预编码矩阵指示域的比特数目，所述码本集合中可以包括一个码本(即不同上行传输层数对应相同的码本)，或者多个码本(即不同码本对应的上行传输层数不同，或者部分不同码本对应的上行传输层数不同)。进一步地，所述终端设备在所述目标码本中确定与所述子带对应的传输预编码矩阵指示域指示的索引对应的上行传输预编码矩阵。
当然，所述终端设备根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵的可实现方式，还可包括其它可实现方式，本申请实施例中对此并不作限制。
本实施例中，通过网络设备确定终端设备上行调度的资源(所述资源对应至少一个子带)和至少一个子带对应的传输预编码矩阵指示域的比特数目，并向所述终端发送包括资 源分配信息指示域、传输层数指示域以及所述至少一个子带对应的传输预编码矩阵指示域的下行控制信息；进一步地，所述终端设备根据所述资源分配信息指示域确定上行调度的所述至少一个子带，并确定所述子带对应的传输预编码矩阵指示域的比特数目(所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的资源对应子带的数目有关)，并根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵。可见，实现了频选调度中的上行传输预编码矩阵的指示，另外还实现了根据调度子带的数目，灵活地调整所述子带对应的传输预编码矩阵指示域的比特数目，从而可以有效地利用传输预编码指示域，提高了控制信道资源的利用率。
可选地，在上述实施例的基础上，若采用“根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵”的上述第一种可实现方式，所述子带对应的上行传输预编码矩阵可以属于本实施例上述部分中的所述码本中；若采用“根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵”的上述第二种可实现方式，所述子带对应的上行传输预编码矩阵可以属于本实施例上述部分中的所述目标码本中。
可选地，所述子带对应的上行传输预编码矩阵中包括：至少一个非零元素且所述非零元素的模值与所述上行传输预编码矩阵中其它非零元素的模值不同，即所述子带对应的上行传输预编码矩阵为非恒模预编码矩阵。
可选地，所述码本或所述目标码本中的上行传输预编码矩阵中的非零且模值非1的元素为
Figure PCTCN2018085681-appb-000044
其中，α m,n代表所述上行传输预编码矩阵中的第m行第n列元素的幅度系数，0＜|α m,n|＜1，
Figure PCTCN2018085681-appb-000045
代表所述上行传输预编码矩阵中的第m行第n列元素的相位系数，
Figure PCTCN2018085681-appb-000046
所述m为小于或等于天线端口数的正整数，所述n为小于或等于所述上行传输层数的正整数。当然，需要说明的是，在实际应用中，α m,n也可以等于0或1(即所述码本中的零元素或者1元素也都可以表示为
Figure PCTCN2018085681-appb-000047
)。
为了便于理解，本申请实施例提供一个2天线端口对应的码本示例，如表2所示，所述码本中包括至少一个非恒模预编码矩阵；以预编码矩阵索引为3和传输层数为2对应的预编码矩阵中的第2行第1列的元素0.5为例，α 2,1＝0.25，
Figure PCTCN2018085681-appb-000048
表2 为本申请实施例提供的2天线端口对应的码本示例
Figure PCTCN2018085681-appb-000049
Figure PCTCN2018085681-appb-000050
Figure PCTCN2018085681-appb-000051
可选地，所述上行传输层数等于1，所述资源分配信息指示域用于指示上行调度的至少两个子带，所述至少两个子带对应的上行传输预编码矩阵的第K行中所有元素对应的模值的平方之和，与所述至少两个子带对应的上行传输预编码矩阵的第L行中所有元素对应的模值的平方之和相等，所述K和所述L都为小于或等于天线端口数的正整数，且所述K不等于所述L。例如，图2B为不同子带对应的上行传输预编码矩阵的示意图，如图2B所示，针对传输层数等于1，假设子带0对应的上行传输预编码矩阵为
Figure PCTCN2018085681-appb-000052
以及子带2对应的上行传输预编码矩阵为
Figure PCTCN2018085681-appb-000053
这两个上行传输预编码矩阵的第1行中所有元素对应的模值的平方之和
Figure PCTCN2018085681-appb-000054
与这两个上行传输预编码矩阵的第2行中所有元素对应的模值的平方之和
Figure PCTCN2018085681-appb-000055
相等，即不同天线端口对应的功率和相等，保证了上行的覆盖。
可选地，所述上行传输层数大于1，所述至少一个子带对应的上行传输预编码矩阵的第K行中所有元素对应的模值的平方之和，与所述至少一个子带对应的上行传输预编码矩 阵的第L行中所有元素对应的模值的平方之和相等，所述K和所述L都为小于或等于天线端口数的正整数，且所述K不等于所述L。例如，针对传输层数等于2，上行传输预编码矩阵为
Figure PCTCN2018085681-appb-000056
所述上行传输预编码矩阵的第1行中所有元素对应的模值的平方之和
Figure PCTCN2018085681-appb-000057
与所述上行传输预编码矩阵的第2行中所有元素对应的模值的平方之和
Figure PCTCN2018085681-appb-000058
相等，从而可以保证每个天线端口发送功率相同，保证了上行的覆盖。
可选地，在上述实施例的基础上，所述网络设备还可以向所述终端设备发送系数指示信息，所述系数指示信息用于指示所述码本或所述目标码本中的上行传输预编码矩阵中的元素
Figure PCTCN2018085681-appb-000059
的所述α m,n和/或所述
Figure PCTCN2018085681-appb-000060
需要说明的是，在实际应用中，α m,n也可以等于0或1。可选地，所述系数指示信息包括：M比特的第一系数指示信息和/或N比特的第二系数指示信息；其中，所述第一系数指示信息用于指示所述α m,n，所述第二系数指示信息用于指示所述
Figure PCTCN2018085681-appb-000061
M和N都为大于0的正整数。例如：所述系数指示信息包括：2比特的第一系数指示信息和2比特的第二系数指示信息，当第一系数指示信息对应的值为00、01、10和11时，分别指示α m,n为0、0.5、
Figure PCTCN2018085681-appb-000062
和1中的某一个(如00指示0、01指示0.5、10指示
Figure PCTCN2018085681-appb-000063
以及11指示1)；当第二系数指示信息对应的值为00、01、10和11时，分别指示
Figure PCTCN2018085681-appb-000064
为0、π/2、π和3π/2中的某一个(如00指示0、01指示π/2、10指示π以及11指示3π/2)。
对应地，所述终端设备接收所述网络设备发送的所述系数指示信息，若所述系数指示信息用于指示所述码本中的上行传输预编码矩阵中的元素
Figure PCTCN2018085681-appb-000065
的所述α m,n和/或所述
Figure PCTCN2018085681-appb-000066
则根据所述系数指示信息确定所述码本；若所述系数指示信息用于指示所述目标码本中的上行传输预编码矩阵中的元素
Figure PCTCN2018085681-appb-000067
的所述α m,n和/或所述
Figure PCTCN2018085681-appb-000068
则根据所述系数指示信息确定所述目标码本。
当然，所述网络设备还可通过其它方式为所述终端设备配置码本，本申请实施例中对此并不作限制。综上所述，本申请实施例中的所述子带对应的上行传输预编码矩阵中包括：至少一个非零元素且所述非零元素的模值与所述上行传输预编码矩阵中其它非零元素的模值不同，即采用了非恒模预编码矩阵，可以较好地匹配实际的信道，从而提高了预编码性能。
通常情况下，由于LTE中采用单载波-频分多址(Single Carrier-Frequency Division Multiple Access，SC-FDMA)技术，其对于预编码矩阵的恒模特性要求较为严格，因此，LTE中所采用的码本为恒模码本。但NR中上行支持正交频分多址(Orthogonal Frequency Division Multiple Access，OFDM)技术，其对预编码矩阵的恒模特性要求降低，并且在实际的MIMO传输中，MIMO信道对应的最优预编码矩阵是非恒模的。因此，现有LTE中的恒模码本很难匹配实际的信道，导致预编码性能的下降。因此，本申请提供的传输预编 码矩阵的指示方法实施例二，旨在解决现有技术中系统性能下降的技术问题。
下面以具体地实施例对本申请的技术方案以及本申请的技术方案如何解决上述技术问题进行详细说明。
图3为本申请提供的传输预编码矩阵的指示方法实施例二的流程示意图。本实施例中涉及的执行主体包括：终端设备和/或网络设备，该终端设备和网络设备都可以通过软件和/或硬件实现。如图3所示，本实施例的方法包括：
步骤S301、确定终端设备对应的至少一个上行传输预编码矩阵以及传输层数。
本步骤中，网络设备根据所述终端设备对应的上行信道状态信息从码本中确定所述终端设备对应的至少一个上行传输预编码矩阵以及传输层数；其中，所述上行传输预编码矩阵中包括：至少一个非零元素且所述非零元素的模值与所述上行传输预编码矩阵中其它非零元素的模值不同，即所述上行传输预编码矩阵为非恒模预编码矩阵。当然，所述网络设备还可根据其他信息确定所述终端设备对应的至少一个上行传输预编码矩阵以及传输层数，本实施例中对此并不作限制。
可选地，所述码本中的上行传输预编码矩阵中的非零且模值非1的元素为
Figure PCTCN2018085681-appb-000069
其中，α m,n代表所述上行传输预编码矩阵中的第m行第n列元素的幅度系数，0＜|α m,n|＜1，
Figure PCTCN2018085681-appb-000070
代表所述上行传输预编码矩阵中的第m行第n列元素的相位系数，
Figure PCTCN2018085681-appb-000071
所述m为小于或等于天线端口数的正整数，所述n为小于或等于所述传输层数的正整数。当然，需要说明的是，在实际应用中，α m,n也可以等于0或1(即所述码本中的零元素或者1元素也都可以表示为
Figure PCTCN2018085681-appb-000072
)。
为了便于理解，本申请实施例提供一个2天线端口对应的码本示例，如表2所示，所述码本中包括至少一个非恒模预编码矩阵；以预编码矩阵索引为3和传输层数为2对应的预编码矩阵中的第2行第1列的元素0.5为例，α 2,1＝0.25，
Figure PCTCN2018085681-appb-000073
可选地，所述传输层数等于1，所述网络设备从所述码本中确定所述终端设备对应的至少两个上行传输预编码矩阵；其中，不同所述上行传输预编码矩阵对应不同的子带，所述至少两个上行传输预编码矩阵的第K行中所有元素对应的模值的平方之和，与所述至少两个上行传输预编码矩阵的第L行中所有元素对应的模值的平方之和相等，所述K和所述L都为小于或等于天线端口数的正整数，且所述K不等于所述L。例如，如图2B所示，针对传输层数等于1，假设子带0对应的上行传输预编码矩阵为
Figure PCTCN2018085681-appb-000074
以及子带2对应的上行传输预编码矩阵为
Figure PCTCN2018085681-appb-000075
这两个上行传输预编码矩阵的第1行中所有元素对应的模值的平方之和
Figure PCTCN2018085681-appb-000076
与这两个上行传输预编码矩阵的第2行中所有元素对应的模值 的平方之和
Figure PCTCN2018085681-appb-000077
相等，即不同天线端口对应的功率和相等。
可选地，所述传输层数大于1，所述至少一个上行传输预编码矩阵的第K行中所有元素对应的模值的平方之和，与所述至少一个上行传输预编码矩阵的第L行中所有元素对应的模值的平方之和相等，所述K和所述L都为小于或等于天线端口数的正整数，且所述K不等于所述L。例如，针对传输层数等于2，上行传输预编码矩阵为
Figure PCTCN2018085681-appb-000078
所述上行传输预编码矩阵的第1行中所有元素对应的模值的平方之和
Figure PCTCN2018085681-appb-000079
与所述上行传输预编码矩阵的第2行中所有元素对应的模值的平方之和
Figure PCTCN2018085681-appb-000080
相等。
步骤S302、向所述终端设备发送传输预编码矩阵指示信息和传输层数指示信息。
本步骤中，所述网络设备向所述终端设备发送传输预编码矩阵指示信息和传输层数指示信息；其中，所述传输预编码矩阵指示信息用于指示所述码本中包括的上行传输预编码矩阵中的所述至少一个上行传输预编码矩阵(例如，所述传输预编码矩阵指示信息用于指示所述至少一个上行传输预编码矩阵的索引)，所述传输层数指示信息用于指示传输层数。可选地，当联合编码时，所述传输预编码矩阵指示信息和所述传输层数指示信息位于下行控制信息中的一个域；当非联合编码时，所述传输预编码矩阵指示信息可以位于所述下行控制信息中的传输预编码矩阵指示域，所述传输层数指示信息可以位于所述下行控制信息中的传输层数指示域。当然，所述传输预编码矩阵指示信息和所述传输层数指示信息还可通过其它携带方式进行传输，本实施例中对此并不作限制。
步骤S303、接收来自网络设备的传输预编码矩阵指示信息和传输层数指示信息。
本步骤中，所述终端设备接收来自所述网络设备的所述传输预编码矩阵指示信息和所述传输层数指示信息；其中，所述传输预编码矩阵指示信息用于指示所述码本中包括的上行传输预编码矩阵中的所述至少一个上行传输预编码矩阵，所述传输层数指示信息用于指示传输层数。
可选地，所述传输层数等于1，所述传输预编码矩阵指示信息用于指示所述码本中包括的上行传输预编码矩阵中的至少两个上行传输预编码矩阵。
步骤S304、根据所述传输预编码矩阵指示信息、所述传输层数指示信息以及所述码本，确定所述至少一个上行传输预编码矩阵。
本步骤中，所述终端设备根据所述传输预编码矩阵指示信息(例如所述传输预编码矩阵指示信息用于指示所述至少一个上行传输预编码矩阵的索引)、所述传输层数以及所述码本，从所述码本中确定出与所述至少一个上行传输预编码矩阵的索引和所述传输层数相匹配的所述至少一个上行传输预编码矩阵，以便进一步根据所述至少一个上行传输预编码矩阵对需要发送的数据进行预处理；其中，所述上行传输预编码矩阵中包括：至少一个非零元素且所述非零元素的模值与所述上行传输预编码矩阵中其它非零元素的模值不同，即所述码本为非恒模码本，其中包括至少一个非恒模预编码矩阵。
可选地，所述终端设备和所述网络设备中都预设有所述码本，或者，所述网络设备通过高层信令消息或物理层信令消息将所述码本配置给所述终端设备。
可选地，所述传输层数等于1，所述传输预编码矩阵指示信息用于指示所述码本中包括的上行传输预编码矩阵中的至少两个上行传输预编码矩阵(例如所述传输预编码矩阵指示信息用于指示所述至少两个上行传输预编码矩阵的索引)；其中，不同所述上行传输预编码矩阵对应不同的子带；对应地，所述终端设备根据所述至少两个上行传输预编码矩阵的索引、所述传输层数以及所述码本，确定所述至少两个上行传输预编码矩阵，其中，所述至少两个上行传输预编码矩阵的第K行中所有元素对应的模值的平方之和，与所述至少两个上行传输预编码矩阵的第L行中所有元素对应的模值的平方之和相等，所述K和所述L都为小于或等于天线端口数的正整数，且所述K不等于所述L。
可选地，所述传输层数大于1，所述终端设备根据所述至少一个上行传输预编码矩阵的索引、所述传输层数以及码本，确定所述至少一个上行传输预编码矩阵，其中，所述至少一个上行传输预编码矩阵的第K行中所有元素对应的模值的平方之和，与所述至少一个上行传输预编码矩阵的第L行中所有元素对应的模值的平方之和相等，所述K和所述L都为小于或等于天线端口数的正整数，且所述K不等于所述L。
可选地，所述码本中的上行传输预编码矩阵中的非零且模值非1的元素为
Figure PCTCN2018085681-appb-000081
其中，α m,n代表所述上行传输预编码矩阵中的第m行第n列元素的幅度系数，0＜|α m,n|＜1，
Figure PCTCN2018085681-appb-000082
代表所述上行传输预编码矩阵中的第m行第n列元素的相位系数，
Figure PCTCN2018085681-appb-000083
所述m为小于或等于天线端口数的正整数，所述n为小于或等于所述传输层数的正整数。
本实施例中，通过网络设备确定终端设备对应的至少一个上行传输预编码矩阵以及传输层数，并向所述终端设备发送传输预编码矩阵指示信息(用于指示码本中包括的上行传输预编码矩阵中的所述至少一个上行传输预编码矩阵)和传输层数指示信息(用于指示传输层数)；进一步地，所述终端设备根据所述传输预编码矩阵指示信息、所述传输层数指示信息以及所述码本，确定所述至少一个上行传输预编码矩阵；其中，所述上行传输预编码矩阵中包括：至少一个非零元素且所述非零元素的模值与所述上行传输预编码矩阵中其它非零元素的模值不同。可见，实现了上行传输预编码矩阵的指示，另外由于采用非恒模预编码矩阵，可以较好地匹配实际的信道，从而提高了预编码性能。
可选地，在上述实施例的基础上，所述网络设备还可以向所述终端设备发送系数指示信息，所述系数指示信息用于指示所述码本中的上行传输预编码矩阵中的元素
Figure PCTCN2018085681-appb-000084
的所述α m,n和/或所述
Figure PCTCN2018085681-appb-000085
需要说明的是，在实际应用中，α m,n也可以等于0或1。可选地，所述系数指示信息包括：M比特的第一系数指示信息和/或N比特的第二系数指示信息；其中，所述第一系数指示信息用于指示所述α m,n，所述第二系数指示信息用于指示所述
Figure PCTCN2018085681-appb-000086
M和N都为大于0的正整数。例如：所述系数指示信息包括：2比特的第一系数指示信息和2比特的第二系数指示信息，当第一系数指示信息对应的值为00、01、10和11时，分别指示α m,n为0、0.5、
Figure PCTCN2018085681-appb-000087
和1中的某一个(如00指示0、01指示0.5、10指示
Figure PCTCN2018085681-appb-000088
以及11指示1)；当第二系数指示信息对应的值为00、01、10和11时，分别指示
Figure PCTCN2018085681-appb-000089
为0、π/2、π和3π/2中的某一个(如00指示0、01指示π/2、10指示π以及11指示3π/2)。
对应地，所述终端设备接收来自所述网络设备的所述系数指示信息，以便根据所述系数指示信息确定所述码本。
当然，所述网络设备还可通过其它方式为所述终端设备配置所述码本，本申请实施例中对此并不作限制。
通常情况下，为了提升边缘覆盖或者提升上行预编码的精度，更好的匹配上行信道，上行传输预编码矩阵数目需要增加，以提供更多的上行波束，保证更为精确的上行方向对准。但由于上行传输预编码矩阵数目的增加，导致传输预编码矩阵指示域的开销较大。因此，本申请提供的传输预编码矩阵的指示方法实施例三和实施例四，旨在解决现有技术中传输预编码矩阵指示域开销较大的技术问题。下面这几个具体的实施例可以相互结合，对于相同或相似的概念或过程可能在某些实施例中不再赘述。
下面以具体地实施例对本申请的技术方案以及本申请的技术方案如何解决上述技术问题进行详细说明。
图4为本申请提供的传输预编码矩阵的指示方法实施例三的流程示意图。本实施例中涉及的执行主体包括：终端设备和/或网络设备，该终端设备和网络设备都可以通过软件和/或硬件实现。如图4所示，本实施例的方法包括：
步骤S401、确定终端设备对应的至少一个上行传输预编码矩阵以及上行传输层数。
本步骤中，网络设备根据所述终端设备对应的上行信道状态信息确定所述终端设备对应的至少一个上行传输预编码矩阵以及上行传输层数。可选地，所述至少一个上行传输预编码矩阵属于码本子集中的预编码矩阵，其中，所述码本子集为所述上行传输层数对应的码本中的一部分。可选地，所述码本为当前传输模式下预设或者配置的预编码矩阵集合(即为完整的码本)。
当然，所述网络设备还可根据其他信息确定所述终端设备对应的至少一个上行传输预编码矩阵以及上行传输层数，本实施例中对此并不作限制。
可选地，所述码本子集中各上行传输预编码矩阵的索引为：按照所述码本中的所述各上行传输预编码矩阵的先后索引顺序依次重新建立的索引，例如：所述码本子集中的索引包括：0、1、2、…、N-2、N-1，N为所述码本子集中包括的预编码矩阵的数目，又例如：所述码本子集中的索引包括：M、M+1、M+2、…、M+N-2、M+N-1，M+N为所述码本子集中包括的预编码矩阵的数目，N为所述码本子集中包括的预编码矩阵的数目，M为预设值。例如，预编码矩阵0在所述码本中的索引为0、预编码矩阵1在所述码本中的索引为1、预编码矩阵2在所述码本中的索引为2、预编码矩阵3在所述码本中的索引为3，假设预编码矩阵1和预编码矩阵3属于所述码本子集，预编码矩阵0和预编码矩阵2不属于所述码本子集，则预编码矩阵1在所述码本子集中的索引为0以及预编码矩阵3在所述码本子集中的索引为1。
步骤S402、向所述终端设备发送下行控制信息。
本步骤中，所述网络设备向所述终端设备发送下行控制信息；其中，所述下行控制信息中包括：传输预编码矩阵指示域以及传输层数指示域，所述传输预编码矩阵指示域用于指示所述至少一个上行传输预编码矩阵的索引，所述传输层数指示域用于指示所述上行传输层数，所述传输预编码矩阵指示域的比特数目与所述码本子集中包括的预编码矩阵的数 目有关。可选地，所述传输预编码矩阵指示域的比特数目为：所述网络设备根据所述码本子集中所包括的预编码矩阵的数目确定的，以确保所述传输预编码矩阵指示域能够指示所述码本子集中的任一预编码矩阵。例如，假设所述码本包括16个预编码矩阵以及所述码本子集包括8个预编码矩阵，则用于指示所述码本的传输预编码矩阵指示域的比特数目为4，但用于指示所述码本子集的传输预编码矩阵指示域的比特数目为3；又例如，假设所述码本包括8个预编码矩阵以及所述码本子集中包括4个预编码矩阵，则用于指示所述码本的传输预编码矩阵指示域的比特数目为3，但用于指示所述码本子集的传输预编码矩阵指示域的比特数目为2。
可见，所述传输预编码矩阵指示域的比特数目小于用于指示所述码本的传输预编码矩阵指示域的比特数目，从而减少了传输预编码矩阵指示域的开销。当然，所述下行控制信息中还可以包括其它指示域，本实施例中对此并不作限制。
需要说明的是，当联合编码时，所述传输层数指示域以及所述传输预编码矩阵指示域可以合并为所述下行控制信息中的一个域，本申请实施例中对此并不作限制。
步骤S403、接收来自网络设备的下行控制信息。
本步骤中，所述终端设备接收来自所述网络设备的所述下行控制信息；其中，所述下行控制信息中包括：所述传输预编码矩阵指示域以及所述传输层数指示域，所述传输预编码矩阵指示域用于指示至少一个上行传输预编码矩阵的索引，所述传输层指示域用于指示上行传输层数。
步骤S404、根据所述至少一个上行传输预编码矩阵的索引、所述传输层数以及所述码本子集，确定所述上行传输预编码矩阵。
本步骤中，所述终端设备根据所述至少一个上行传输预编码矩阵的索引、所述传输层数以及所述码本子集，从所述码本子集中确定出与所述至少一个上行传输预编码矩阵的索引和所述传输层数相匹配的所述至少一个上行传输预编码矩阵，以便进一步根据所述至少一个上行传输预编码矩阵对需要发送的数据进行预处理。
本实施例中，通过网络设备确定终端设备对应的至少一个上行传输预编码矩阵以及上行传输层数，并向所述终端设备发送下行控制信息；其中，所述下行控制信息中包括：传输预编码矩阵指示域以及传输层数指示域，所述传输预编码矩阵指示域用于指示所述至少一个上行传输预编码矩阵的索引，所述传输层数指示域用于指示所述上行传输层数，所述传输预编码矩阵指示域的比特数目与码本子集中包括的预编码矩阵的数目有关，所述码本子集为所述上行传输层数对应的码本中的一部分；进一步地，所述终端设备根据所述至少一个上行传输预编码矩阵的索引、所述传输层数以及所述码本子集，确定所述上行传输预编码矩阵。可见，实现了上行传输预编码矩阵的指示，另外由于所述码本子集为所述上行传输层数对应的码本中的一部分，因此，所述传输预编码矩阵指示域的比特数目小于用于指示所述码本的传输预编码矩阵指示域的比特数目，从而减少了传输预编码矩阵指示域的开销。
图5为本申请提供的传输预编码矩阵的指示方法实施例四的流程示意图。如图5所示，在上述实施例三的基础上，本实施例的方法包括：
步骤S501、确定所述终端设备对应的所述码本子集。
本步骤中，所述网络设备确定所述终端设备对应的所述码本子集；其中，所述码本子集为所述上行传输层数对应的所述码本中的一部分，可选地，所述码本为当前传输模式下预设或者配置的预编码矩阵集合(即为完整的码本)。
可选地，网络设备根据所述终端设备发送的上行信号或者信道，确定需要配置的码本子集；其中，所述上行信号可以为用于上行信道探测的参考信号，如上行探测参考信号(Sounding Reference Signal，SRS)、用于上行解调的参考信号，如上行解调参考信号(Demodulation Reference Signal,DMRS)等，所述信道可以为用于随机接入的物理信道，如物理随机接入信道，(Physical Random Access Channel，PRACH)、用于上行数据传输的信道，如物理上行共享数据信道(Physical Uplink Shared Channel，PUSCH)或用于上行控制信息传输的信道，如物理上行控制信道(Physical Uplink Control Channel，PUCCH)等，本申请实施例中对此不做限定。具体的如何根据所述终端设备发送的上行信号或者信道确定需要配置的码本子集，本申请实施例中不做限定，例如可以根据所述上行信号或信道估计可能使用的码本子集或者上行传输预编码矩阵集合(所述上行传输预编码矩阵集合中包含至少一个预编码矩阵)，在终端设备使用所述上行传输预编码矩阵集合中的预编码矩阵进行上行发送时，网络设备测得的信号质量比使用其他预编码矩阵(非属于所述上行传输预编码矩阵集合中的预编码矩阵)进行上行发送时的信号质量好，可选地，所述信号质量包括信号干扰噪声比(Signal to Interference plus Noise Ratio，SINR)，当然，所述信号质量还可以包括其它信息，本申请实施例中对此并不作限制。
步骤S502、向所述终端设备发送配置消息。
本步骤中，所述网络设备向所述终端设备发送用于指示所述码本子集的配置消息，以便所述终端设备根据所述配置消息确定出所述码本子集。可选地，所述配置消息可以为高层信令消息，也可以为物理层信令消息，本申请实施例中对此并不做限定。
可选地，所述配置消息包括：至少一个比特位，所述比特位用于指示；所述码本中与所述比特位对应的至少一个传输预编码矩阵是否属于所述码本子集；若所述比特位的数值等于预设数值(例如1)，则所述码本中与所述比特位对应的所述至少一个传输预编码矩阵属于所述码本子集；若所述比特位的数值不等于所述预设数值(例如所述比特位的数值等于0)，则所述码本中与所述比特位对应的所述至少一个传输预编码矩阵不属于所述码本子集。例如：假设所述配置消息包括：3个比特位，第1个比特位用于指示所述码本中索引为0-3对应的传输预编码矩阵(或预编码矩阵)、第2个比特位用于指示所述码本中索引为4-7对应的传输预编码矩阵以及第3个比特位用于指示所述码本中索引为8-11对应的传输预编码矩阵，当所述第1个比特位的数值等于所述预设数值，则代表所述码本中索引为0-3对应的传输预编码矩阵属于所述码本子集，当所述第2个比特位的数值不等于所述预设数值，则代表所述码本中索引为4-7对应的传输预编码矩阵不属于所述码本子集。
可选地，所述配置消息包括：采样因子l和偏移量Λ；可选地，所述网络设备和所述终端设备中都预设有公式
Figure PCTCN2018085681-appb-000090
其中，所述
Figure PCTCN2018085681-appb-000091
代表所述码本中传输预编码矩阵的索引，mod代表取余运算；所述网络设备和/或所述终端设备在确定所述采样因子l和所述偏移量Λ后，便可获知所述码本中的索引
Figure PCTCN2018085681-appb-000092
满足公式
Figure PCTCN2018085681-appb-000093
的传输预编码矩阵属于所述码本子集。
可选地，所述配置消息包括：用于指示构成所述码本子集的至少一个目标元素的信息 (例如，假设码本中的元素
Figure PCTCN2018085681-appb-000094
0≤|α m,n|≤1，
Figure PCTCN2018085681-appb-000095
目标元素是指构成码本子集中的预编码矩阵的元素，所述目标元素的信息可以为α m,n和/或
Figure PCTCN2018085681-appb-000096
)，以便所述终端设备确定所述码本中仅包含所述目标元素的预编码矩阵属于所述码本子集，即所述码本中包含除所述目标元素之外的其它元素的任意预编码矩阵不属于所述码本子集。
可选地，所述配置消息还可用于指示所述码本中用于构成所述码本子集的至少一个目标预编码矩阵的索引，以便所述终端设备根据所述配置消息确定所述码本子集。
当然，所述配置消息还可采用其它形式，用于指示所述码本子集，本申请实施例中对此并不作限制。
步骤S503、接收所述网络设备发送的所述配置消息。
本步骤中，所述终端设备接收所述网络设备发送的所述配置消息，以便根据所述配置消息确定所述码本子集。可选地，若所述配置消息包括：所述至少一个比特位，则所述终端设备根据所述至少一个比特位的数值，判断所述码本中与所述比特位对应的至少一个传输预编码矩阵是否属于所述码本子集；在所述比特位的数值等于预设数值(例如1)，则所述终端设备确定所述码本中与所述比特位对应的所述至少一个传输预编码矩阵属于所述码本子集。可选地，若所述配置消息包括：采样因子l和偏移量Λ，则所述终端设备根据所述采样因子l和偏移量Λ，确定所述码本中的索引
Figure PCTCN2018085681-appb-000097
满足公式
Figure PCTCN2018085681-appb-000098
的传输预编码矩阵属于所述码本子集。可选地，若所述配置消息包括：用于指示构成所述码本子集的至少一个目标元素的信息，则所述终端设备根据所述配置消息确定所述码本中仅包含所述目标元素的预编码矩阵属于所述码本子集。当然，所述配置消息还可包括其它形式，对应地，所述终端设备还可通过其它形式确定所述码本子集，本实施例中此处不再赘述。
本实施例中，通过所述网络设备确定所述终端设备对应的所述码本子集(所述码本子集为所述上行传输层数对应的所述码本中的一部分)，并向所述终端设备发送用于指示所述码本子集的配置消息；进一步地，所述终端设备接收所述网络设备发送的所述配置消息，以便根据所述配置消息确定所述码本子集。可见，实现了所述码本子集的指示方式，以便所述终端设备根据所述码本子集确定所述上行传输预编码矩阵。
根据前述方法，图6为本申请实施例提供的设备的示意图一，如图6所示，该设备可以为终端设备10，也可以为芯片或电路，比如可设置于终端设备的芯片或电路。该终端设备10可以对应上述方法中的终端设备。
该设备可以包括处理器110和存储器120。该存储器120用于存储指令，该处理器110用于执行该存储器120存储的指令，以实现如上图2A、图3-图5中任意附图对应的方法中的步骤。
进一步的，该设备还可以包括、输入口140和输出口150。进一步的，该设备还可以进一步包括总线系统130，其中，处理器110、存储器120、输入口140和输出口150可以通过总线系统130相连。
处理器110用于执行该存储器120存储的指令，以控制输入口140接收信号，并控制输出口150发送信号，完成上述方法中终端设备的步骤。其中，输入口140和输出口150可以为相同或者不同的物理实体。为相同的物理实体时，可以统称为输入输出口。所述存储器220可以集成在所述处理器210中，也可以与所述处理器210分开设置。
作为一种实现方式，输入口140和输出口150的功能可以考虑通过收发电路或者收发 的专用芯片实现。处理器110可以考虑通过专用处理芯片、处理电路、处理器或者通用芯片实现。
作为另一种实现方式，可以考虑使用通用计算机的方式来实现本申请实施例提供的终端设备。即将实现处理器110，输入口140和输出口150功能的程序代码存储在存储器中，通用处理器通过执行存储器中的代码来实现处理器110，输入口140和输出口150的功能。
该设备所涉及的与本申请实施例提供的技术方案相关的概念，解释和详细说明及其他步骤请参见前述方法或其他实施例中关于这些内容的描述，此处不做赘述。
图7为本申请提供的一种终端设备的结构示意图。该终端设备可适用于图1所示出的系统中。为了便于说明，图7仅示出了终端设备的主要部件。如图7所示，终端设备10包括处理器、存储器、控制电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对整个终端设备进行控制，执行软件程序，处理软件程序的数据，例如用于支持终端设备执行上述传输预编码矩阵的指示方法实施例中所描述的动作。存储器主要用于存储软件程序和数据，例如存储上述实施例中所描述的码本。控制电路主要用于基带信号与射频信号的转换以及对射频信号的处理。控制电路和天线一起也可以叫做输入输出口，主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。
当终端设备开机后，处理器可以读取存储单元中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
本领域技术人员可以理解，为了便于说明，图7仅示出了一个存储器和处理器。在实际的终端设备中，可以存在多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本申请实施例对此不做限制。
作为一种可选的实现方式，处理器可以包括基带处理器和中央处理器，基带处理器主要用于对通信协议以及通信数据进行处理，中央处理器主要用于对整个终端设备进行控制，执行软件程序，处理软件程序的数据。图7中的处理器集成了基带处理器和中央处理器的功能，本领域技术人员可以理解，基带处理器和中央处理器也可以是各自独立的处理器，通过总线等技术互联。本领域技术人员可以理解，终端设备可以包括多个基带处理器以适应不同的网络制式，终端设备可以包括多个中央处理器以增强其处理能力，终端设备的各个部件可以通过各种总线连接。所述基带处理器也可以表述为基带处理电路或者基带处理芯片。所述中央处理器也可以表述为中央处理电路或者中央处理芯片。对通信协议以及通信数据进行处理的功能可以内置在处理器中，也可以以软件程序的形式存储在存储单元中，由处理器执行软件程序以实现基带处理功能。
示例性的，在申请实施例中，可以将具有收发功能的天线和控制电路视为终端设备10的收发单元101，将具有处理功能的处理器视为终端设备10的处理单元102。如图7所示，终端设备10包括收发单元101和处理单元102。收发单元也可以称为输入输出口、收发机、收发装置等。可选的，可以将收发单元101中用于实现接收功能的器件视为接收 单元，将收发单元101中用于实现发送功能的器件视为发送单元，即收发单元101包括接收单元和发送单元示例性的，接收单元也可以称为接收机、输入口、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
根据前述方法，图8为本申请实施例提供的设备的示意图二，如图8所示，该设备可以为网络设备20，也可以为芯片或电路，如可设置于网络设备内的芯片或电路。该设备20对应上述方法中的网络设备。该设备可以包括处理器210和存储器220。该存储器220用于存储指令，该处理器210用于执行该存储器220存储的指令，以使所述设备实现前述如图2A、图3-图5中任意附图对应的方法。
进一步的，该网络还可以包括输入口240和输出口250。再进一步的，该网络还可以包括总线系统230。
其中，处理器210、存储器220、输入口240和输出口250通过总线系统230相连，处理器210用于执行该存储器220存储的指令，以控制输入口240接收信号，并控制输出口250发送信号，完成上述方法中网络设备的步骤。其中，输入口240和输出口250可以为相同或者不同的物理实体。为相同的物理实体时，可以统称为输入输出口。所述存储器220可以集成在所述处理器210中，也可以与所述处理器210分开设置。
作为一种实现方式，输入口240和输出口250的功能可以考虑通过收发电路或者收发的专用芯片实现。处理器210可以考虑通过专用处理芯片、处理电路、处理器或者通用芯片实现。
作为另一种实现方式，可以考虑使用通用计算机的方式来实现本申请实施例提供的网络设备。即将实现处理器210，输入口240和输出口250功能的程序代码存储在存储器中，通用处理器通过执行存储器中的代码来实现处理器210，输入口240和输出口250的功能。
所述设备所涉及的与本申请实施例提供的技术方案相关的概念，解释和详细说明及其他步骤请参见前述方法或其他实施例中关于这些内容的描述，此处不做赘述。
根据前述方法，图9为本申请实施例提供的一种网络设备的结构示意图，如可以为基站的结构示意图。如图9所示，该基站可应用于如图1所示的系统中。基站20包括一个或多个射频单元，如远端射频单元(remote radio unit,RRU)201和一个或多个基带单元(baseband unit，BBU)(也可称为数字单元，digital unit，DU)202。所述RRU201可以称为收发单元、收发机、收发电路、或者输入输出口等等，其可以包括至少一个天线2011和射频单元2012。所述RRU201部分主要用于射频信号的收发以及射频信号与基带信号的转换，例如用于向终端设备发送上述实施例中所述的信令消息。所述BBU202部分主要用于进行基带处理，对基站进行控制等。所述RRU201与BBU202可以是物理上设置在一起，也可以物理上分离设置的，即分布式基站。
所述BBU202为基站的控制中心，也可以称为处理单元，主要用于完成基带处理功能，如信道编码，复用，调制，扩频等等。例如所述BBU(处理单元)可以用于控制基站执行上述方法实施例中关于网络设备的操作流程。
在一个示例中，所述BBU202可以由一个或多个单板构成，多个单板可以共同支持单一接入制式的无线接入网(如LTE网)，也可以分别支持不同接入制式的无线接入网。所述BBU202还包括存储器2021和处理器2022。所述存储器2021用以存储必要的指令和数据。例如存储器2021存储上述实施例中的预设信息、码本等。所述处理器2022用于 控制基站进行必要的动作，例如用于控制基站执行上述方法实施例中关于网络设备的操作流程。所述存储器2021和处理器2022可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路。
根据本申请实施例提供的方法，本申请实施例还提供一种通信系统，其包括前述的网络设备和一个或多于一个终端设备。
应理解，在本申请实施例中，处理器可以是中央处理单元(Central Processing Unit，简称为“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)、现成可编程门阵列(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。
该存储器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。
该总线系统除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统。
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模块组合执行完成。软件模块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，处理器读取存储器中的信息，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。
还应理解，本文中涉及的第一、第二、第三、第四以及各种数字编号仅为描述方便进行的区分，并不用来限制本申请实施例的范围。
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。
应理解，在本申请的各种实施例中，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。
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描述的各种说明性逻辑块(illustrative logical block)和步骤(step)，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。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。专业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，为描述的方便和简洁，上述描述的系统、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，所揭露的系统、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系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
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，也可以两个或两个以上单元集成在一个单元中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。
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，可轻易想到变化或替换，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所述权利要求的保护范围为准。

Claims (12)

  1. 一种传输预编码矩阵的指示方法，其特征在于，包括：
    接收来自网络设备的下行控制信息；所述下行控制信息包括：资源分配信息指示域、传输层数指示域以及至少一个子带对应的传输预编码矩阵指示域，所述资源分配信息指示域用于指示上行调度的资源，所述资源对应至少一个子带，所述传输层数指示域用于指示上行传输层数，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵；
    确定所述子带对应的传输预编码矩阵指示域的比特数目；其中，所述子带对应的传输预编码矩阵指示域的比特数目不大于传输预编码矩阵指示域的预设总比特数目；各所述子带对应的传输预编码矩阵指示域的比特数目之和不大于所述预设总比特数目，所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的资源对应的子带的数目有关；
    根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵。
  2. 根据权利要求1所述的方法，其特征在于，所述子带对应的传输预编码矩阵指示域的比特数目满足如下公式：
    N＝min{floor(N Δ/N s),N max}
    其中，N代表所述子带对应的传输预编码矩阵指示域的比特数目，floor()代表向下取整函数，N Δ代表所述传输预编码矩阵指示域的预设总比特数目，N s代表所述至少一个子带的数目以及N max代表传输预编码矩阵指示域的预设最大比特数目，所述至少一个子带的数目为不小于1的正整数。
  3. 根据权利要求1所述的方法，其特征在于，所述子带对应的传输预编码矩阵指示域的比特数目等于：预设信息中与所述至少一个子带的数目相对应的传输预编码矩阵指示域的目标预设比特数目；其中，所述预设信息包括：至少一个预设子带数目与所述预设子带数目对应的传输预编码矩阵指示域的预设比特数目之间的对应关系，所述至少一个子带的数目为不小于1的正整数。
  4. 根据权利要求1-3中任一项所述的方法，其特征在于，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的初始索引，所述根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵，包括：
    根据所述子带对应的传输预编码矩阵指示域的比特数目和所述子带对应的传输预编码矩阵指示域的值，确定所述子带对应的上行传输预编码矩阵的初始索引；
    根据所述初始索引以及初始索引与目标索引之间的对应关系，确定所述子带对应的上行传输预编码矩阵的目标索引；
    根据所述目标索引、所述上行传输层数以及码本，确定所述子带对应的上行传输预编码矩阵。
  5. 根据权利要求4所述的方法，其特征在于，所述初始索引与目标索引之间的对应关系满足以下公式或以下公式对应表格：
    Figure PCTCN2018085681-appb-100001
    其中，
    Figure PCTCN2018085681-appb-100002
    代表所述初始索引，k代表索引调整系数，Δ代表索引偏移系数，I dx代表所述目标索引，所述k为预设的数值或者所述网络设备配置的数值，所述Δ为预设的数值或者所述网络设备配置的数值。
  6. 根据权利要求1-3中任一项所述的方法，其特征在于，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的索引，所述根据所述子带对应的传输预编码矩阵指示域的比特数目以及所述上行传输层数，确定所述子带对应的上行传输预编码矩阵，包括：
    在目标码本中确定与所述子带对应的传输预编码矩阵指示域指示的索引对应的上行传输预编码矩阵，所述目标码本与所述子带对应的传输预编码矩阵指示域的比特数目和所述上行传输层数相匹配。
  7. 一种传输预编码矩阵的指示方法，其特征在于，包括：
    确定终端设备上行调度的资源和至少一个子带对应的传输预编码矩阵指示域的比特数目；其中，所述资源对应至少一个子带，所述子带对应的传输预编码矩阵指示域的比特数目不大于传输预编码矩阵指示域的预设总比特数目；各所述子带对应的传输预编码矩阵指示域的比特数目之和不大于所述预设总比特数目，所述子带对应的传输预编码矩阵指示域的比特数目与所述上行调度的资源对应的子带的数目有关；
    向终端设备发送下行控制信息；所述下行控制信息中包括：资源分配信息指示域、传输层数指示域以及所述至少一个子带对应的传输预编码矩阵指示域，所述资源分配信息指示域用于指示上行调度的所述资源，所述传输层数指示域用于指示上行传输层数，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵。
  8. 根据权利要求7所述的方法，其特征在于，所述子带对应的传输预编码矩阵指示域的比特数目满足如下公式：
    N＝min{floor(N Δ/N s),N max}
    其中，N代表所述子带对应的传输预编码矩阵指示域的比特数目，floor()代表向下取整函数，N Δ代表所述传输预编码矩阵指示域的预设总比特数目，N s代表所述至少一个子带的数目以及N max代表传输预编码矩阵指示域的预设最大比特数目，所述至少一个子带的数目为不小于1的正整数。
  9. 根据权利要求7所述的方法，其特征在于，所述子带对应的传输预编码矩阵指示域的比特数目等于：预设信息中与所述至少一个子带的数目相对应的传输预编码矩阵指示域的目标预设比特数目；其中，所述预设信息包括：至少一个预设子带数目与所述预设子带数目对应的传输预编码矩阵指示域的预设比特数目之间的对应关系，所述至少一个子带的数目为不小于1的正整数。
  10. 根据权利要求7-9中任一项所述的方法，其特征在于，所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的初始索引，所述初始索引与所述子带对应的传输预编码矩阵的目标索引之间具有对应关系；或者，
    所述子带对应的传输预编码矩阵指示域用于指示所述子带对应的上行传输预编码矩阵的索引，所述索引用于指示目标码本中与所述子带对应的传输预编码矩阵指示域指示的索引对应的上行传输预编码矩阵，所述目标码本与所述子带对应的传输预编码矩阵指示域 的比特数目和所述上行传输层数相匹配。
  11. 一种设备，其特征在于，包括处理器和存储器；
    其中，所述存储器用于存储指令，所述处理器用于执行所述存储器存储的指令，当所述处理器执行所述存储器存储的指令时，所述设备用于完成如权利要求1至10任意一项所述的方法。
  12. 一种计算机存储介质，其特征在于，用于存储指令，当所述指令被执行时，如权利要求1至10任意一项所述的方法被执行。
PCT/CN2018/085681 2017-05-05 2018-05-04 传输预编码矩阵的指示方法和设备 WO2018202154A1 (zh)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP21203625.5A EP4037196A1 (en) 2017-05-05 2018-05-04 Transmission precoding matrix indication method and device
EP18794205.7A EP3637631B1 (en) 2017-05-05 2018-05-04 Method for indicating transmission precoding matrix and device
US16/673,432 US11206064B2 (en) 2017-05-05 2019-11-04 Transmission precoding matrix indication method and device
US17/529,575 US11757497B2 (en) 2017-05-05 2021-11-18 Transmission precoding matrix indication method and device
US18/228,195 US12119902B2 (en) 2017-05-05 2023-07-31 Transmission precoding matrix indication method and device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710314190.8A CN108809386B (zh) 2017-05-05 2017-05-05 传输预编码矩阵的指示方法和设备
CN201710314190.8 2017-05-05

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/673,432 Continuation US11206064B2 (en) 2017-05-05 2019-11-04 Transmission precoding matrix indication method and device

Publications (1)

Publication Number Publication Date
WO2018202154A1 true WO2018202154A1 (zh) 2018-11-08

Family

ID=64015882

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/085681 WO2018202154A1 (zh) 2017-05-05 2018-05-04 传输预编码矩阵的指示方法和设备

Country Status (4)

Country Link
US (3) US11206064B2 (zh)
EP (2) EP4037196A1 (zh)
CN (2) CN108809386B (zh)
WO (1) WO2018202154A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4131795A4 (en) * 2020-04-03 2023-09-27 Datang Mobile Communications Equipment Co., Ltd. METHODS FOR INDICATING AND DETERMINING A PRECODING MATRIX, DEVICE AND MEDIUM
WO2023206284A1 (en) * 2022-04-28 2023-11-02 Nec Corporation Methods, devices, and computer readable medium for communication

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108809386B (zh) * 2017-05-05 2023-06-16 华为技术有限公司 传输预编码矩阵的指示方法和设备
US10873482B2 (en) * 2017-10-18 2020-12-22 Qualcomm Incorporated Transmitter schemes to facilitate side channel information estimation
CN111181705B (zh) * 2018-11-15 2022-07-15 维沃移动通信有限公司 上行传输方法、指示方法、终端及网络设备
CN110838858B (zh) * 2019-11-08 2021-04-06 北京紫光展锐通信技术有限公司 一种码本确定方法及装置
CN111010738B (zh) * 2019-12-20 2021-12-24 北京紫光展锐通信技术有限公司 上行数据传输方法、用户设备及可读存储介质
WO2021163992A1 (en) * 2020-02-21 2021-08-26 Qualcomm Incorporated Uplink pre-coding resource group (uprg) based wireless communications
CN113517913A (zh) * 2020-04-09 2021-10-19 维沃移动通信有限公司 预编码索引指示方法、设备及系统
CN116325534A (zh) * 2020-10-16 2023-06-23 华为技术有限公司 信息发送方法、信息接收方法及相关设备
US11929800B2 (en) * 2021-07-02 2024-03-12 Samsung Electronics Co., Ltd. Method and apparatus for multi-stage UL precoding
CN117411522A (zh) * 2022-07-04 2024-01-16 维沃移动通信有限公司 预编码矩阵指示、确定方法、装置、网络侧设备及终端
CN117811622A (zh) * 2022-09-24 2024-04-02 华为技术有限公司 一种上行预编码的指示方法及通信装置
WO2024065385A1 (en) * 2022-09-29 2024-04-04 Lenovo (Beijing) Ltd. Ul precoding schemes for full coherent ue and non-coherent ue with eight antenna ports
CN118678464A (zh) * 2023-03-17 2024-09-20 北京紫光展锐通信技术有限公司 通信方法及装置、计算机可读存储介质

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102291209A (zh) * 2010-06-20 2011-12-21 上海贝尔股份有限公司 增强长期演进的管理设备中控制上行传输的方法及装置
CN102468925A (zh) * 2010-11-09 2012-05-23 大唐移动通信设备有限公司 预编码矩阵索引上报及预编码处理方法、系统和装置
CN106302269A (zh) * 2015-06-04 2017-01-04 电信科学技术研究院 一种信道状态信息的反馈及其控制方法及装置

Family Cites Families (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8179775B2 (en) * 2007-08-14 2012-05-15 Texas Instruments Incorporated Precoding matrix feedback processes, circuits and systems
KR101588731B1 (ko) * 2009-02-20 2016-01-26 엘지전자 주식회사 Ｓｃ-ｆｄｍａ가 적용된 상향링크 ｍｉｍｏ 시스템에 있어서, ｐｍｉ 통지 방법
US8537658B2 (en) * 2010-08-16 2013-09-17 Motorola Mobility Llc Method of codebook design and precoder feedback in wireless communication systems
US9083479B2 (en) * 2012-05-11 2015-07-14 Intel Corporation Signaling for downlink coordinated multipoint in a wireless communication system
WO2014039616A1 (en) * 2012-09-06 2014-03-13 Marvell World Trade Ltd. Efficient search of precoders in precoded mimo systems
US9973249B2 (en) * 2014-12-23 2018-05-15 Samsung Electronics Co., Ltd. Channel state information feedback schemes for FD-MIMO
KR102574004B1 (ko) * 2015-01-19 2023-09-01 퀄컴 인코포레이티드 Fd-mimo 를 위한 csi 피드백 오버헤드 감축
US10212724B2 (en) * 2015-01-30 2019-02-19 Nokia Technologies Oy Enhanced link adaptatrion
WO2016163842A1 (ko) * 2015-04-10 2016-10-13 엘지전자 (주) 무선 통신 시스템에서 채널 상태 정보를 보고하기 위한 방법 및 이를 위한 장치
US9967012B2 (en) * 2015-05-06 2018-05-08 Samsung Electronics Co., Ltd. Method and apparatus for channel state information (CSI) reporting
US9942884B2 (en) * 2015-05-15 2018-04-10 Nokia Technologies Oy Efficient uplink data indication techniques for MIMO-OFDMA transmission in WLAN
CN107925455B (zh) * 2015-06-18 2021-09-07 瑞典爱立信有限公司 用于适配码本以供多个天线配置使用的系统和方法
WO2016206052A1 (en) * 2015-06-25 2016-12-29 Intel IP Corporation User equipment and codebook search method for 4tx dual codebook (ran1)
KR102202038B1 (ko) 2015-07-23 2021-01-12 엘지전자 주식회사 다중 안테나 무선 통신 시스템에서 코드북 기반 신호 송수신 방법 및 이를 위한 장치
US10200168B2 (en) * 2015-08-27 2019-02-05 Futurewei Technologies, Inc. Systems and methods for adaptation in a wireless network
US10763925B2 (en) * 2015-11-11 2020-09-01 Samsung Electronics Co., Ltd. Method and apparatus for reduced feedback MIMO
CN106953672B (zh) * 2016-01-07 2020-04-14 中兴通讯股份有限公司 一种多天线系统中信道信息反馈的方法及终端
CN107181514B (zh) * 2016-03-11 2020-09-15 电信科学技术研究院 一种csi反馈方法、预编码方法及装置
AU2017308909A1 (en) * 2016-08-10 2019-02-21 Interdigital Patent Holdings, Inc. Systems and methods for aperiodic measurement reference signal transmission in multiple antenna systems
US10484064B2 (en) * 2016-09-01 2019-11-19 Samsung Electronics Co., Ltd. Method and apparatus for downlink and uplink CSI acquisition
US10985891B2 (en) * 2016-09-30 2021-04-20 Motorola Mobility Llc Method and apparatus for reporting channel state information
US10200103B2 (en) * 2016-11-23 2019-02-05 Samsung Electronics Co., Ltd. Method and apparatus to enable multi-resolution CSI reporting in advanced wireless communication systems
US20180159707A1 (en) * 2016-12-01 2018-06-07 Samsung Electronics Co., Ltd. Method and apparatus for multistream transmission
WO2018111809A1 (en) * 2016-12-13 2018-06-21 Intel IP Corporation User equipment (ue), generation node-b (gnb) and methods for signaling of control information for pre-coding
US10873439B2 (en) * 2016-12-16 2020-12-22 Samsung Electronics Co., Ltd. Method and apparatus for multiplexing channel state information
US10749584B2 (en) * 2016-12-22 2020-08-18 Samsung Electronics Co., Ltd. Uplink MIMO codebook for advanced wireless communication systems
WO2018143654A1 (ko) * 2017-01-31 2018-08-09 엘지전자 주식회사 차세대 무선 통신 시스템에서 서브밴드 단위의 하향링크 스케줄링을 수행하는 방법 및 이를 위한 장치
US11115241B2 (en) * 2017-03-24 2021-09-07 Apple Inc. DM-RS grouping and CSI reporting for CoMP
PL3598819T3 (pl) * 2017-04-20 2021-12-27 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Sposób, aparat i system do przekazywania okresowych informacji/sygnałów łącza w górę
KR102331127B1 (ko) * 2017-04-25 2021-11-26 삼성전자 주식회사 상향링크 이동통신 시스템을 위한 자원할당 및 프리코딩 방법 및 장치
JP6810269B2 (ja) * 2017-05-01 2021-01-06 エルジー エレクトロニクス インコーポレイティド 無線通信システムにおける端末のサウンディング方法及びこのための装置
CN108809386B (zh) * 2017-05-05 2023-06-16 华为技术有限公司 传输预编码矩阵的指示方法和设备
US20180368083A1 (en) * 2017-06-16 2018-12-20 Mediatek Inc. Method And Apparatus For Uplink Transmissions In Mobile Communications
US20190059013A1 (en) * 2017-08-21 2019-02-21 Samsung Electronics Co., Ltd. Method and apparatus for multiplexing higher-resolution channel state information (csi)
WO2019069296A1 (en) * 2017-10-02 2019-04-11 Telefonaktiebolaget Lm Ericsson (Publ) ORDERING OF CSI IN UCI
US11082107B2 (en) * 2018-03-09 2021-08-03 Mediatek Inc. Frequency-selective precoding for uplink transmissions in mobile communications

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102291209A (zh) * 2010-06-20 2011-12-21 上海贝尔股份有限公司 增强长期演进的管理设备中控制上行传输的方法及装置
CN102468925A (zh) * 2010-11-09 2012-05-23 大唐移动通信设备有限公司 预编码矩阵索引上报及预编码处理方法、系统和装置
CN106302269A (zh) * 2015-06-04 2017-01-04 电信科学技术研究院 一种信道状态信息的反馈及其控制方法及装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4131795A4 (en) * 2020-04-03 2023-09-27 Datang Mobile Communications Equipment Co., Ltd. METHODS FOR INDICATING AND DETERMINING A PRECODING MATRIX, DEVICE AND MEDIUM
WO2023206284A1 (en) * 2022-04-28 2023-11-02 Nec Corporation Methods, devices, and computer readable medium for communication

Also Published As

Publication number Publication date
US20220173774A1 (en) 2022-06-02
US11757497B2 (en) 2023-09-12
US20200099423A1 (en) 2020-03-26
EP3637631A1 (en) 2020-04-15
EP4037196A1 (en) 2022-08-03
CN116800311A (zh) 2023-09-22
CN108809386A (zh) 2018-11-13
US11206064B2 (en) 2021-12-21
US12119902B2 (en) 2024-10-15
EP3637631B1 (en) 2021-11-03
EP3637631A4 (en) 2020-04-15
US20230379018A1 (en) 2023-11-23
CN108809386B (zh) 2023-06-16

Similar Documents

Publication Publication Date Title
WO2018202154A1 (zh) 传输预编码矩阵的指示方法和设备
WO2020035069A1 (zh) 一种上行传输指示的方法、终端、基站及计算机存储介质
WO2021052179A1 (zh) 一种上行数据传输方法及装置
US11005550B2 (en) Method and apparatus for transmitting downlink control information (DCI)
WO2019029684A1 (zh) 数据传输方法、基站和终端
CN111602449B (zh) 一种通信方法及装置
WO2019136723A1 (zh) 上行数据传输方法及相关设备
WO2019062681A1 (zh) 一种上行传输、配置方法、终端及基站
CN108631831A (zh) 信息的传输方法和设备
US11101866B2 (en) Rank indication reporting method and apparatus, and indication method and apparatus
WO2018228228A9 (zh) 信息传输方法及装置
WO2019196801A1 (zh) 数据传输的方法、通信装置及系统
WO2018228119A1 (zh) 波束管理方法、网络设备和终端
US20190123991A1 (en) Systems and Methods for a Sounding Frame in an IEEE 802.11AX Compliant Network
WO2018202137A1 (zh) 一种通信方法及装置
US20230024879A1 (en) Indication information transmission method and communication device
US11196522B2 (en) Enhanced sounding reference signal scheme
WO2018171786A1 (zh) 信息的传输方法和设备
WO2019196886A1 (zh) 一种预编码矩阵确定方法及装置
EP3614576B1 (en) Rank indication reporting method and device, and indication method and device
WO2019157742A1 (zh) 信道状态信息矩阵信息处理方法及通信装置
WO2023124943A1 (zh) 一种预编码指示方式的确定方法和装置
JP2024513020A (ja) データ伝送方法、装置、機器および記憶媒体
WO2017049640A1 (zh) 一种预编码方法及装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18794205

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2018794205

Country of ref document: EP

Effective date: 20191205