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WO2018129733A1 - Procédé de détermination d'informations d'état de canal, dispositif de réseau d'accès et équipement terminal - Google Patents

Procédé de détermination d'informations d'état de canal, dispositif de réseau d'accès et équipement terminal Download PDF

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Publication number
WO2018129733A1
WO2018129733A1 PCT/CN2017/071235 CN2017071235W WO2018129733A1 WO 2018129733 A1 WO2018129733 A1 WO 2018129733A1 CN 2017071235 W CN2017071235 W CN 2017071235W WO 2018129733 A1 WO2018129733 A1 WO 2018129733A1
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Prior art keywords
matrices
precoding
indication field
matrix
terminal device
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PCT/CN2017/071235
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English (en)
Chinese (zh)
Inventor
张瑞齐
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2017/071235 priority Critical patent/WO2018129733A1/fr
Priority to CN201780083716.4A priority patent/CN110192367A/zh
Publication of WO2018129733A1 publication Critical patent/WO2018129733A1/fr
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity

Definitions

  • the embodiments of the present application relate to the field of communications technologies, and more specifically, to a method for determining channel state information, an access network device, and a terminal device.
  • the access network device When the access network device communicates with the terminal device, the access network device needs to obtain the channel state information estimated by the terminal device (English: Channel Status Information, referred to as CSI).
  • the CSI can adapt the communication system to the current channel conditions. In particular, high reliability and high rate communication can be guaranteed in a multi-antenna system.
  • the access network device first sends precoding matrix indication information to the terminal device, where the precoding matrix indication information is used to indicate a precoding matrix that is allowed to be used by the terminal and a precoding matrix that is prohibited from being used by the terminal.
  • the access network device sends a channel status information reference signal (English: Channel Status Information-Reference Signal, CSI-RS for short).
  • the terminal device may determine the CSI according to the precoding matrix indication information and the CSI-RS, and feed back the determined CSI to the access network device.
  • a bipolar precoding matrix structure is defined, that is, a precoding matrix is multiplied by a first precoding matrix and a second precoding matrix.
  • the precoding matrix indication information sent by the access network device is a bit sequence. Each bit in the bit sequence corresponds to each of the first precoding matrix and the second precoding matrix below each rank.
  • the access network device indicates whether the first precoding matrix and the second precoding matrix corresponding to the bit are restricted in use by controlling the value of each bit in the bit sequence to be 0 or 1.
  • the terminal device may determine, according to the value of each bit in the bit sequence, whether a precoding matrix corresponding to each bit is usable.
  • the number of antennas increases accordingly.
  • another form of precoding matrix is defined in the fourteenth version of the LTE standard (English: LTE Release 14, LTE Rel-14 for short), wherein the first precoding matrix is composed of mutually orthogonal vector pairs And amplitude or energy information is introduced in the first precoding matrix.
  • the number of precoding matrices is significantly increased.
  • the length of the bit sequence for indicating whether the precoding matrix is available is also increased accordingly. Therefore, if a long bit sequence is transmitted, the occupation of radio resources is increased.
  • the method for determining channel state information, the access network device, and the terminal device provided by the embodiments of the present application can reduce the occupied radio resources in the process of determining channel state information.
  • the embodiment of the present application provides a method for determining channel state information, where the method includes: a terminal device receiving precoding matrix indication information from an access network device, where the precoding matrix indication information includes a first indication field and a second indication field; the terminal device determines M first matrices from the N first matrices according to the first indication field, where each first matrix in the first matrix comprises a vector consisting of at least two vectors a group, where N is a positive integer greater than or equal to 1, and M is a positive integer greater than or equal to 1 and less than or equal to N; the terminal device determines K second matrices according to the second indication field, where the K The second matrix is a diagonal matrix, and K is a positive integer greater than or equal to 1; the terminal device determines M ⁇ K first precoding matrices, where Is the m ⁇ k first precoding matrices in the M ⁇ K first precoding matrices, For the mth first matrix of the M first matrices, P k
  • the terminal device determines a precoding matrix set according to the M ⁇ K first precoding matrices; the terminal device receives channel state information from the access network device a reference signal; the terminal device determines channel state information according to the channel state information reference signal and the precoding matrix set; the terminal device sends the channel state information to the access network device.
  • the access network device may indicate the first matrix and the second matrix used to form the first precoding matrix when indicating the precoding matrix set, so that it is not necessary to indicate whether each precoding matrix belongs to the precoding matrix. set. This can reduce the length of the indication information for indicating the set of precoding matrices, thereby being able to reduce the occupation of radio resources in the process of determining CSI.
  • the first indication field includes N bits
  • the terminal device determines, according to the first indication field, M pieces from the N first matrices.
  • the first indication field includes S bits
  • the terminal device determines, according to the first indication field, M pieces from the N first matrices.
  • the number of bits used to indicate the attributes of the first matrix can be reduced, so that the purpose of saving resources can be achieved.
  • any two vectors in the vector group are orthogonal.
  • the access network device limits the vector in one direction
  • the set of vectors that can be combined into the vector of the direction can be simultaneously limited, so that multiple vectors can be prevented from being combined in the restricted direction by the stronger energy.
  • the precoding matrix indication information further includes a third indication field
  • the method further includes: The terminal device determines, according to the third indication field, L second precoding matrices, where L is a positive integer greater than or equal to 1; the terminal device determines the precoding matrix according to the M ⁇ K first precoding matrices.
  • the access network device may limit the precoding matrix by limiting the second precoding matrix.
  • the access network device may limit the precoding matrix by limiting the candidate values of the elements of the second precoding matrix.
  • the access network device may limit the precoding matrix by limiting the number of columns of the second precoding matrix.
  • the precoding matrix indication information further includes a third indication field and a fourth indication field, the method further comprising: determining, by the terminal device, L second precoding matrices according to the third indication field and the fourth indication field, The value of at least one element in each of the L second precoding matrices is indicated by the third indication field, and each of the L second precoding matrices is second The number of columns of the elements of the precoding matrix is indicated by the fourth indication field, and L is a positive integer greater than or equal to 1; the terminal device determines the precoding matrix set according to the M ⁇ K first precoding matrices, The method includes: determining, by the terminal device, the precoding matrix set according to the M ⁇ K first precoding matrices and the L second precoding matrices, where For the first second precoding matrix in the L second precoding matrices, W
  • the embodiment of the present application provides a method for determining channel state information, where the method includes: the access network device sends precoding matrix indication information to the terminal device, where the precoding matrix indication information includes a first indication field and a second indication field, where the first indication field is used to indicate M first matrices in the N first matrices, and the second indication field is used to indicate K second matrices, each of the first matrices
  • the matrix includes a vector group consisting of at least two vectors, each of which is a diagonal matrix, N is a positive integer greater than or equal to 1, and M is a positive integer greater than or equal to 1 and less than or equal to N, K A positive integer greater than or equal to 1;
  • the access network device transmits a channel state information reference signal to the terminal device; the access network device receives channel state information from the terminal device.
  • the access network device may indicate the first matrix and the second matrix used to form the first precoding matrix when indicating the precoding matrix set, so that it is not necessary to indicate whether each precoding matrix belongs to the precoding matrix. set. This can reduce the length of the indication information for indicating the set of precoding matrices, thereby being able to reduce the occupation of radio resources in the process of determining CSI.
  • the relationship between the first matrix and the bit value of the foregoing technical solution is simple, and the terminal device and the access network device do not need to save or preset complex mapping relationships.
  • the number of first matrices corresponding to the bits is a positive integer greater than or equal to two. According to the above technical solution, the number of bits used to indicate the attributes of the first matrix can be reduced, so that the purpose of saving resources can be achieved.
  • any two vectors in the vector group are orthogonal.
  • the access network device can limit the set of vectors that can be merged into the vector in the direction while limiting the vector in one direction, thereby avoiding multiple vectors. By combining the strong energy in the restricted direction, the vector limit fails.
  • the precoding matrix indication information further includes a third indication field, the third indication field For indicating L second precoding matrices, where L is a positive integer greater than or equal to 1.
  • the access network device may limit the precoding matrix by limiting the second precoding matrix.
  • the access network device may limit the precoding matrix by limiting the candidate values of the elements of the second precoding matrix.
  • the number of the elements of each second precoding matrix in the L second precoding matrices is Indicated by the third indication field.
  • the access network device may limit the precoding matrix by limiting the number of columns of the second precoding matrix.
  • the seventh possible implementation of the second aspect indicates that the information further includes a third indication field and a fourth indication field, where the third indication field and the fourth indication field are used to indicate L second precoding matrices, where the L second The value of at least one element in each second precoding matrix in the precoding matrix is indicated by the third indication field, the elements of each of the second precoding matrices of the L second precoding matrices The number of columns is indicated by the fourth indication field, and L is a positive integer greater than or equal to one.
  • the access network device may limit the precoding matrix by limiting the manner of the number of columns of the second precoding matrix and the candidate values of the elements.
  • an embodiment of the present application provides a terminal device, where the access network device includes a unit for performing the first aspect or various possible implementation manners of the first aspect.
  • an embodiment of the present application provides an access network device, where the terminal device includes a unit for performing various possible implementations of the second aspect or the second aspect.
  • the embodiment of the present application provides a terminal device.
  • the terminal device includes a processor, a memory, and a transceiver.
  • the memory is for storing instructions to implement the method of the first aspect and any of the possible implementations of the first aspect.
  • the processor executes the instructions stored in the memory, in conjunction with the communication interface, to implement the method of the first aspect or any of the possible implementations of the first aspect.
  • an embodiment of the present application provides an access network device.
  • the access network device includes a processor, a memory, and a transceiver.
  • the memory is for storing instructions to implement the method of the second aspect and any of the possible implementations of the second aspect.
  • the processor executes the instructions stored in the memory, in conjunction with the communication interface, to implement the method of any of the possible implementations of the second aspect or the second aspect.
  • Figure 1 shows a possible system network diagram of the present application
  • FIG. 2 is a schematic flowchart of a method for determining channel state information according to an embodiment of the present application
  • FIG. 3 is a structural block diagram of a terminal device according to an embodiment of the present application.
  • FIG. 4 is a structural block diagram of a network side device according to an embodiment of the present application.
  • FIG. 5 is a structural block diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 6 is a structural block diagram of a network side device according to an embodiment of the present invention.
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • 5G Fifth Generation
  • Figure 1 shows a possible system network diagram of the present application.
  • At least one terminal device can be included in the system 100 shown in FIG.
  • the at least one terminal device communicates with a radio access network (English: Radio Access Network, RAN for short).
  • the RAN includes at least one access network device, and for the sake of clarity, only one access network device 101 and one terminal device 102 are shown.
  • the RAN is connected to a core network (English: core network, referred to as CN).
  • the CN may be coupled to one or more external networks (English: External Network), such as the Internet, public switched telephone network (PSTN).
  • the method for determining channel state information, the terminal device, and the access network device provided by the embodiments of the present application may be applied to the system shown in FIG. 1.
  • the terminal device in the technical solution of the embodiment of the present application may also be referred to as an access terminal, a user equipment (English: User Equipment, UE for short), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, and a remote station.
  • the access network device in the technical solution of the present application may be an evolved base station (English: Evolutional Node B, eNB for short) in the LTE system, and a base station device in a future 5G network.
  • eNB Evolutional Node B
  • FIG. 2 is a schematic flowchart of a method for determining channel state information (CSI) according to an embodiment of the present application.
  • the access network device sends the precoding matrix indication information to the terminal device, where the precoding matrix indication information includes a first indication field and a second indication field.
  • the terminal device determines M first matrices from the N first matrices according to the first indication field, where each first matrix in the first matrix includes a vector group consisting of at least two vectors, where N is a positive integer greater than or equal to 1, and M is a positive integer greater than or equal to 1 and less than or equal to N.
  • the first indication field includes N bits.
  • the N first matrices are known to the terminal device and the access network device.
  • the terminal device and the access network device can obtain the N first matrices in a plurality of manners, which is not limited by the embodiment of the present application.
  • the N bits in the first indication field are in one-to-one correspondence with the N first matrices.
  • the first bit of the N bits corresponds to the first first matrix in the N first matrices, to indicate whether the first first matrix belongs to the M first matrices
  • the N The second bit of the bits corresponds to the second first matrix of the N first matrices, Used to indicate whether the second first matrix belongs to the M first matrices, and so on.
  • Each of the N bits may indicate whether the corresponding first matrix belongs to the M first matrices by using different bit values. For example, when the bit value is 1, the first matrix corresponding to the bit belongs to the M first A matrix having a bit value of 0 indicates that the first matrix corresponding to the bit does not belong to the M first matrices.
  • the relationship between the first matrix and the bit value of the foregoing technical solution is simple, and the terminal device and the access network device do not need to save or preset complex mapping relationships.
  • the access network device determines three first matrices, the three first matrices are respectively a first first matrix, a third first matrix, and a fifth first matrix in the eight first matrices.
  • the first indication field that the access network device can send to the terminal device may be 10101000.
  • the terminal device may determine, according to the first indication field, a first first matrix, a third first matrix, and a fifth first matrix in the eight first matrices. The three first matrices determined by the access network device.
  • the first indication field may include S bits, and S is a positive integer less than N and greater than or equal to 1.
  • each of the S bits corresponds to at least one of the N first matrices.
  • Each of the first matrices of the N first matrices has at least one of the S bits.
  • the correspondence between each of the S bits and the first matrix may be pre-stored or preset on the access network device and the terminal device.
  • the correspondence between each of the S bits and the first matrix of the N first matrices may be represented by a function, or may be represented by a mapping relationship table, which is not limited.
  • the network device may determine values of bits corresponding to the M first matrices.
  • a bit value of 1 indicates that the first matrix corresponding to the bit belongs to the M first matrices
  • a bit value of 0 indicates that the first matrices corresponding to the bits do not belong to the M first matrices.
  • the first bit of the S bits corresponds to the first first matrix and the second first matrix of the eight first matrices
  • the second bit of the S bits corresponds to the eight first matrices
  • the third first matrix and the fourth first matrix, the third bit of the S bits corresponds to the fifth first matrix and the sixth first matrix of the eight first matrices, in S bits
  • the fourth bit corresponds to the seventh first matrix and the eighth first matrix of the eight first matrices.
  • the four first matrices determined by the access network device are respectively the first first matrix, the second first matrix, the fifth first matrix, and the sixth first matrix in the eight first matrices
  • the first indication field that the access network device can send to the terminal device may be 1010.
  • the terminal device may determine, according to the first indication field, a first first matrix, a second first matrix, and a fifth first matrix in the eight first matrices. And the sixth first matrix belongs to the four first matrices determined by the access network device.
  • any two vectors in the set of vectors are orthogonal.
  • the access network device limits the vector in one direction
  • the set of vectors that can be combined into the vector of the direction can be simultaneously limited, so that multiple vectors can be prevented from being combined in the restricted direction by the stronger energy. causess the vector limit to fail.
  • the terminal device determines, according to the second indication field, K second matrices, where the K second matrices are diagonal matrices, and K is a positive integer greater than or equal to 1.
  • the terminal device determines, according to the second indication field, K second matrices
  • the method includes: the terminal device determines K second matrices according to the second matrix template and the second indication field.
  • the second matrix template includes at least one first non-fixed element.
  • the second indication field is used to indicate a candidate value of each non-fixed element of the at least one first non-fixed element
  • Each of the P 1 first non-fixed elements may include X selectable values, and X is a positive integer greater than one. This may include a second indication field indicates P 1 second subfield, the P 1 second subfield correspond to the indication P 1 of first non-fixing element.
  • Each of the second subfield indicates that the second P 1 indicates subfield comprises X bits, the bits X and X optional value correspondence, the bits of the X bit values of x Indicates whether the xth selectable value of the X selectable values is a candidate value.
  • the diagonal of the second matrix template includes four elements, which are A1, A2, A3, and B1, respectively, where A1 to A3 indicate that the element at the position is the first fixed element, B1 Indicates that the element at this position is the first non-fixed element.
  • each first non-fixed element can have four optional values, respectively 1, 0.
  • the access network device determines 1 and
  • the access network device may send a second indication field consisting of 4 bits to the terminal device. The values of these four bits are 1010 respectively.
  • the terminal device may determine that the element at the location of B1 may have two values.
  • the terminal device can determine two second matrices, wherein the two second matrices are diagonal matrices, and four elements on a diagonal of one of the two second matrices are respectively A1, A2, A3, 1, the four elements on the diagonal of the other second matrix of the two second matrices are A1, A2, A3, and
  • the terminal device may determine K second matrices from the K' second matrices according to the second indication field, where K' is a positive integer greater than or equal to K. Determining, by the terminal device, the implementation manners of the K second matrices from the K' second matrices according to the second indication field, and determining, by the terminal device, the M first matrices from the N first matrices according to the first indication field The implementation is the same, so I won't go into details here.
  • the terminal device determines a precoding matrix set according to the M ⁇ K first precoding matrices.
  • W W 1 ⁇ W 2 , where W represents a precoding matrix, W 1 represents a first precoding matrix, and W 2 represents a second precoding matrix.
  • the terminal device may determine M first matrices according to the first indication field sent by the access network device.
  • the terminal device may determine the K second matrix according to the second indication field sent by the access network device.
  • the at least one second precoding matrix that is saved or determined or preset by the terminal device is a second precoding matrix that can be used to determine a precoding matrix in the precoding matrix set.
  • the access network device may indicate the first matrix and the second matrix used to form the first precoding matrix of the precoding matrix set when indicating the precoding matrix set, so that it is not necessary to indicate whether each precoding matrix is Belongs to the set of precoding matrices.
  • the manner in which the access network device indicates the first precoding matrix is to respectively indicate a first matrix and a second matrix that constitute the first precoding matrix.
  • the first matrix is a set of vectors, the different values of the elements of the second matrix corresponding to different powers. That is to say, in the above technical solution, since the first matrix and the second matrix can be respectively indicated, the vector group and the power can be respectively limited.
  • the L second precoding matrices in the at least one second precoding matrix that are saved or determined or preset by the terminal device are used to determine a preamble in the precoding matrix set.
  • the precoding matrix indication information sent by the access network device to the terminal device may further include a third indication field.
  • the third indication field is used to indicate the L the second precoding matrix.
  • the terminal device may determine, according to the third indication field, L second precoding matrices, where L is a positive integer greater than or equal to 1.
  • the terminal device may determine the precoding matrix set according to the L candidate second precoding matrices and the M ⁇ K candidate first precoding matrices, where For the first second precoding matrix in the L second precoding matrices, W mk1 is a precoding matrix determined according to the m ⁇ k first precoding matrices and the first second precoding matrix.
  • the access network device may limit the precoding matrix included in the precoding matrix set by limiting the second precoding matrix.
  • a value of at least one element in each of the L second precoding matrices is indicated by the third indication field.
  • the terminal device may determine the L second precoding matrices according to the third indication field and the R second precoding matrix templates.
  • Each of the R second precoding matrix templates includes at least one second non-fixed element, the third indication field is used to indicate each of the at least one second non-fixed element Candidate values for non-fixed elements.
  • the second pre-coding matrix R templates r th second precoding matrix Q elements comprising a template
  • Q Q element includes a non-fixed second element.
  • the value of each of the 2 second fixed elements of Q is determined.
  • Q 1 second non-fixed element Each non-fixed element may have Y optional values, and Y is a positive integer greater than one.
  • the third indication may include a field indicating the Q 1 of third subfield, the Q 1 of third sub-field indicates the non-Q 1 second fixing element correspond.
  • Each sub-field of the third indication the third Q 1 indicates a sub-field comprises bits of Y, the Y bit values correspond with optional Y, the Y value of the first bit by bit y Indicates whether the yth selectable value of the Y optional values is a candidate value.
  • the first second precoding matrix template includes a column element having four elements on the column element, the four elements being C1, D1, D2, and D3, respectively, wherein C1 indicates that the element at the position is the second Fixed elements, D1 to D3, indicate that the element at this position is the second non-fixed element.
  • each second non-fixed element can be four
  • the optional values are 1, -1, j, -j, where j represents an imaginary number.
  • the first bit to the fourth bit in the third indication field correspond to the four optional values, respectively, whether the four optional values can be used as the first second in the second precoding matrix.
  • the access network device determines that 1 and j are candidate values of the first element in the second precoding matrix, and the first bit of the third indication field that the access network device can send to the terminal device
  • the value to the fourth bit is 1010, respectively.
  • the terminal device may determine, according to the values of the first bit to the fourth bit of the third indication field, two candidates for the first second non-fixed element of the second precoding matrix. Value, the two candidate values are 1 and j, respectively.
  • the fifth to eighth bits in the third indication field correspond to the four optional values, respectively, whether the four optional values can be used as the second in the second precoding matrix. Candidate values for the second non-fixed element; and so on.
  • the terminal device can determine a plurality of second precoding matrices according to the third indication field and the first second precoding matrix template. Similarly, the terminal device may determine, according to the third indication field and each precoding matrix template in the R second precoding matrix templates, a second precoding matrix corresponding to each second precoding matrix template. Thus, L second precoding matrices can be determined.
  • the terminal device may determine L second precoding matrices from the L′ second precoding matrices according to the third indication field, where L′ is greater than or equal to L. A positive integer. Determining, by the terminal device, the implementation manners of the L second precoding matrices from the L' second precoding matrices according to the third indication field, and determining, by the terminal device, the M from the N first matrices according to the first indication field The implementation of the first matrix is the same, and need not be described here.
  • the L' second precoding matrices may be divided into R groups of second precoding matrices according to the number of column elements.
  • each second precoding matrix template in the R second precoding matrix templates includes at least one second non-fixed element, where the third indication field is used to indicate the at least one row A candidate value for the second non-fixed element of each of the two non-fixed elements.
  • the terminal device may determine the L second precoding matrices according to the third indication field and the R second precoding matrix templates.
  • the rth second precoding matrix template includes Q row elements, and each of the Q row elements includes a plurality of elements.
  • the value of the second fixed element of the Q 2 line is determined.
  • Q 1 comprises a second non-fixed-line element can have optional values Y, Y is a positive integer greater than 1.
  • the third indication field may include Q 1 third indicator subfields, and the Q 1 third indicator subfields are in one-to-one correspondence with the Q 1 row.
  • Each sub-field of the third indication the third Q 1 indicates a sub-field comprises bits of Y, the Y bit values correspond with optional Y, the Y value of the first bit by bit y Indicates whether the yth selectable value of the Y optional values is a candidate value.
  • the rth second precoding matrix template includes four rows of elements.
  • the first row of elements in the four-line element are fixed elements.
  • the second to fourth row elements are non-fixed elements, and each row element can have four optional values, respectively 1, 1, -1, j, -j, where j represents an imaginary number.
  • the first bit to the fourth bit in the third indication field are corresponding to the four optional values, respectively, whether the four optional values can be used as the second line in the second precoding matrix is not fixed.
  • the candidate value of the element is not fixed.
  • the access network device determines that 1 and j are candidate values of the second row of non-fixed elements in the second precoding matrix, and the first indication field of the third indication field that the access network device can send to the terminal device
  • the value of the bits to the fourth bit is 1010, respectively.
  • the terminal device may be according to the third The values of the first bit to the fourth bit of the indication field determine two candidate values for the second row element of the second precoding matrix, the two candidate values being 1 and j, respectively. More specifically, each of the r elements of the second row of the second precoding matrix in the L second precoding matrices has a value of 1 or j.
  • the fifth bit to the eighth bit in the third indication field correspond to the four selectable values, respectively, whether the four selectable values can be used as the third in the second precoding matrix.
  • the terminal device can determine a plurality of second precoding matrices according to the third indication field and the rth second precoding matrix template.
  • the terminal device may determine, according to the third indication field and each precoding matrix template in the R second precoding matrix templates, a second precoding matrix corresponding to each second precoding matrix template. So that L second precoding matrices can be determined
  • the L second precoding matrices that the terminal device can determine according to the third indication field may be divided into R groups of second precoding matrices according to the number of column elements.
  • the second precoding matrix includes at most R column elements.
  • the number of columns of the elements of each second precoding matrix in the L second precoding matrices is indicated by the third indication field.
  • the at least one second precoding matrix that is saved or determined or preset by the terminal device and the access network device is divided into R groups of second precoding matrices according to the number of column elements.
  • a second precoding matrix in the at least one second precoding matrix includes at most an R column element.
  • the third indication field may include R bits, and the R bits are in one-to-one correspondence with the R column elements. The rth bit of the R bits is used to indicate whether the second precoding matrix composed of the r column elements belongs to the L second precoding matrices.
  • the access network device determines that the L precoding matrices are all second precoding matrices composed of 1 column element and all second precoding matrices composed of 2 column elements.
  • the access network device can send a 4-bit fourth indication field to the terminal device.
  • the fourth indication field is 1100. In this way, the terminal device can determine that the L second precoding matrices are composed of 1 column element or 2 column elements.
  • the second precoding matrix template including one column element and the second precoding matrix template including two column elements include Z row elements in total and the Z1 row elements in the Z row elements are second non-fixed elements, Z 2 row elements
  • Z Z 1 +Z 2
  • Z is a positive integer greater than or equal to 2
  • Z 1 and Z 2 are positive integers greater than or equal to 1.
  • Each second non-fixed element can select four values, in which case the terminal device can determine Candidate second precoding matrices.
  • the access network device determines that the L precoding matrices are all second precoding matrices composed of 1 column element and all second precodings composed of 2 column elements. matrix.
  • the access network device can send a 4-bit fourth indication field to the terminal device.
  • the fourth indication field is 1100.
  • the terminal device can determine that the second precoding matrix is composed of one column element or two column elements.
  • the L' second terminal device may determine that the second precoding matrix of the L' second precoding matrices including the number of columns of elements 1 and 2 belongs to the L second precoding matrices.
  • the precoding matrix sent by the access network device to the terminal device in the case where the third indication field is included in the precoding matrix indication information sent by the access network device to the terminal device may also be included in the indication information.
  • the terminal device may determine, according to the third indication field and the fourth indication field, L second precoding matrices, wherein at least one element in each second precoding matrix of the L second precoding matrices The value of the second indication field is indicated by the third indication field, and the number of columns of elements of each of the L second precoding matrices is indicated by the fourth indication field.
  • the terminal device may determine the precoding matrix set according to the L second precoding matrices and the M ⁇ K candidate first precoding matrices, where For the first second precoding matrix in the L second precoding matrices, W mk1 is a precoding matrix determined according to the m ⁇ k first precoding matrices and the first second precoding matrix. .
  • the terminal device may determine the L 1 second precoding matrix based on the third indication field.
  • the implementation manner of determining the second precoding matrix by the terminal device according to the third indication field is the same as the implementation manner of determining the second precoding matrix by the terminal device according to the third indication field in the foregoing embodiment, and details are not described herein.
  • the terminal device determines the L second precoding matrices from the L 1 second precoding matrices according to the fourth indication field, where L 1 is a positive integer greater than or equal to L.
  • the L 1 second precoding matrices include at most R column elements, and the fourth indication field includes R bits.
  • the R bits are in one-to-one correspondence with the R column elements.
  • the rth bit of the R bits is used to indicate whether the second precoding matrix including the second precoding matrix composed of the r column elements belongs to the L second precoding matrices.
  • the terminal device determines L 1 second precoding matrices according to the third indication field.
  • the L 1 second precoding matrices may be divided into 4 sets of second precoding matrices, and each set of second precoding matrices in the 4 sets of second precoding matrices includes one or more second precoding matrices.
  • the access network device determines that the second precoding matrix consisting of 1 column element and the second precoding matrix composed of 2 column elements belong to the L second precoding matrices.
  • the access network device can send a 4-bit fourth indication field to the terminal device.
  • the fourth indication field is 1100.
  • the terminal device can determine that the precoding matrix in the first group of second precoding matrices and the second group of second precoding matrices in the four groups of second precoding matrices belong to the L second precoding matrices.
  • the candidate value of each second non-fixed element is two of the four available values, in which case the terminal device can determine Second precoding matrix.
  • the terminal device may further determine L 2 second precoding matrices according to the fourth indication field, and then, according to the third indication field, the L 2 second precoding matrices according to the third indication field.
  • the L second precoding matrices are determined, wherein L 2 is a positive integer greater than or equal to L. Determining, by the terminal device, the implementation manners of the L second precoding matrices from the L 2 second precoding matrices according to the third indication field, and the terminal device from the N first matrices according to the first indication field It is determined that the implementations of the M first matrices are the same, and need not be described here.
  • the terminal device may first determine L 3 second precoding matrix templates according to the fourth indication field, and then determine the L second according to the third indication field and the L 3 second precoding matrix templates.
  • a precoding matrix where L 3 is a positive integer greater than or equal to one.
  • the terminal device field L 3 and the second precoding matrix is determined that the template a second implementation of L precoding matrix with the terminal apparatus according to the third indication field R and a second precoding matrix based on the third indication
  • the template determines that the L second precoding matrices are implemented in the same manner, and need not be described here.
  • the access network device determines that the second precoding matrix consisting of 1 column element and the second precoding matrix composed of 2 column elements belong to the L second precoding matrices.
  • the access network device can send a 4-bit fourth indication field to the terminal device.
  • the fourth indication field is 1100.
  • the terminal device can determine the first second precoding matrix template and the second second precoding matrix template in the four second precoding matrix templates.
  • the definition of the second precoding matrix template here is the same as the definition of the second precoding matrix template in the above embodiment, and need not be described here.
  • the terminal device determines the L second precoding matrices according to the third indication field, the first second precoding matrix template, and the second second precoding matrix template.
  • the access network device determines that the second precoding matrix composed of 1 column element and the second precoding matrix composed of 2 column elements belong to the L second precoding matrices.
  • the access network device can send a 4-bit fourth indication field to the terminal device.
  • the fourth indication field is 1100.
  • the terminal device may determine the L 2 second pre-coding matrix L 'second pre-coding matrix.
  • the L' second precoding matrices have the same meanings as the L' second precoding matrices in the above embodiment, and need not be described here.
  • the L 2 second precoding matrices are second precoding matrices in which the number of element columns in the L' second precoding matrices are 1 and 2.
  • the terminal device may determine the L second precoding matrices from the L 2 second precoding matrices according to the third indication field.
  • the access network device determines candidate values of each element of the M first matrix, the K second matrix, and the L second precoding matrices, the candidate values of each row element of the second precoding matrix, and the There are a plurality of ways for the number of the second pre-coding matrix elements, which is not limited by the embodiment of the present application.
  • the terminal device receives a channel state information reference signal sent by the access network device.
  • the terminal device determines channel state information according to the channel state information reference signal and the precoding matrix set.
  • the terminal device sends the channel state information to the access network device.
  • Steps 206 to 208 are the same as the methods for determining CSI and transmitting CSI in the prior art, and need not be described here.
  • FIG. 3 is a structural block diagram of a terminal device according to an embodiment of the present application.
  • the terminal device 300 includes a receiving unit 301, a transmitting unit 302, and a processing unit 303.
  • the receiving unit 301 is configured to receive precoding matrix indication information from the access network device, where the precoding matrix indication information includes a first indication field and a second indication field.
  • the processing unit 303 is configured to determine M first matrices from the N first matrices according to the first indication field, where each first matrix in the first matrix includes a vector group consisting of at least two vectors, Where N is a positive integer greater than or equal to 1, and M is a positive integer greater than or equal to 1 and less than or equal to N.
  • the processing unit 303 is further configured to determine K second matrices according to the second indication field, where the K second matrices are diagonal matrices, and K is a positive integer greater than or equal to 1.
  • the processing unit 303 is further configured to determine a precoding matrix set according to the M ⁇ K first precoding matrices.
  • the receiving unit 301 is further configured to receive a channel state information reference signal sent by the access network device.
  • the processing unit 303 is further configured to determine channel state information according to the channel state information reference signal and the precoding matrix set.
  • the sending unit 302 is configured to send the channel state information to the access network device.
  • the operations and functions of the receiving unit 301, the transmitting unit 302, and the processing unit 303 of the terminal device 300 may be referred to The description in the above method is not repeated here in order to avoid repetition.
  • Processing unit 303 can be implemented by a processor, and receiving unit 301 and transmitting unit 302 can be implemented by a transceiver.
  • FIG. 4 is a structural block diagram of an access network device according to an embodiment of the present application. As shown in FIG. 4, the access network device 400 includes a transmitting unit 401 and a receiving unit 402.
  • the sending unit 401 is configured to send precoding matrix indication information to the terminal device, where the precoding matrix indication information includes a first indication field and a second indication field, where the first indication field is used to indicate the N first matrices M first matrices, the second indication field is used to indicate K second matrices, each first matrix in the first matrix comprises a vector group consisting of at least two vectors, the K second matrices are For a diagonal matrix, N is a positive integer greater than or equal to 1, M is a positive integer greater than or equal to 1 and less than or equal to N, and K is a positive integer greater than or equal to 1.
  • the sending unit 401 is further configured to send a channel state information reference signal to the terminal device.
  • the receiving unit 402 is configured to receive channel state information sent by the terminal device.
  • the transmitting unit 401 and the receiving unit 402 can be implemented by a transceiver.
  • the access network device 400 can also include a processing unit 403, which can be implemented by a processor.
  • FIG. 5 is a structural block diagram of a terminal device according to an embodiment of the present invention.
  • the terminal device 500 shown in FIG. 5 includes a processor 501, a memory 502, and a transceiver 503.
  • terminal device 500 communicate with one another via internal connection paths, passing control and/or data signals.
  • Processor 501 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 501 or an instruction in a form of software.
  • the processor 501 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA Field Programmable Gate Array
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read only memory or an electrically erasable programmable memory, a register, etc.
  • RAM random access memory
  • ROM read-only memory
  • programmable read only memory or an electrically erasable programmable memory
  • register etc.
  • the storage medium is located in the memory 502, and the processor 501 reads the instructions in the memory 502, in conjunction with the transceiver 503 to perform the steps performed by the terminal device in the above method.
  • the terminal device 500 should include, in addition to the processor 501, the memory 502 and the transceiver 503 as shown in FIG. 5, some necessary means such as an antenna, a display, an input device and the like. In order to avoid redundancy, the above device is not shown in FIG.
  • the processor 501 can be a processing unit 303 as shown in FIG. 3, and the transceiver 503 can be a receiving unit 301 and a transmitting unit 302.
  • FIG. 6 is a structural block diagram of an access network device according to an embodiment of the present invention.
  • the access network device 600 shown in FIG. 6 includes a processor 601, a memory 602, and a transceiver 603.
  • the various components in the access network device 600 communicate with one another via internal connection paths to communicate control and/or data signals.
  • Processor 601 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 601 or an instruction in a form of software.
  • the processor 601 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA Field Programmable Gate Array
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read only memory or an electrically erasable programmable memory, a register, etc.
  • RAM random access memory
  • ROM read-only memory
  • programmable read only memory or an electrically erasable programmable memory
  • register etc.
  • the storage medium is located in the memory 602, and the processor 601 reads the instructions in the memory 602, and the transceiver 603 performs the steps performed by the access network device in the above method.
  • the access network device 600 should include some necessary devices, such as an antenna, a cyclic prefix remover, and a fast Fourier, in addition to the processor 601, the memory 602, and the transceiver 603 as shown in FIG. Transform the processor, etc. In order to avoid redundancy, the above device is not shown in FIG.
  • the processor 601 may be a processing unit 403 as shown in FIG. 4, and the transceiver 603 may be a transmitting unit 401 and a receiving unit 402.
  • 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 functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present application is essentially or Portions contributing to the prior art or portions of the technical solution may be embodied in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer) , a server, or a network device, or the like, or a processor, performs all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

Les modes de réalisation de la présente invention concernent un procédé de détermination d'informations d'état de canal, un dispositif de réseau d'accès et un équipement terminal. Le procédé comprend les étapes suivantes : un équipement terminal reçoit des informations d'indication de matrice de précodage en provenance d'un dispositif de réseau d'accès ; l'équipement terminal détermine M premières matrices à partir de N premières matrices en fonction d'un premier champ d'indication ; l'équipement terminal détermine K secondes matrices en fonction d'un second champ d'indication ; l'équipement terminal détermine MxK premières matrices de codage ; l'équipement terminal détermine un ensemble de matrices de précodage en fonction des MxK premières matrices de précodage ; l'équipement terminal reçoit un signal de référence d'informations d'état de canal en provenance du dispositif de réseau d'accès ; l'équipement terminal détermine des informations d'état de canal en fonction du signal de référence d'informations d'état de canal et de l'ensemble de matrices de précodage ; et l'équipement terminal envoie les informations d'état de canal au dispositif de réseau d'accès. Au moyen de la solution technique, des ressources sans fil occupées dans un processus de détermination d'informations d'état de canal peuvent être réduites.
PCT/CN2017/071235 2017-01-16 2017-01-16 Procédé de détermination d'informations d'état de canal, dispositif de réseau d'accès et équipement terminal Ceased WO2018129733A1 (fr)

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PCT/CN2017/071235 WO2018129733A1 (fr) 2017-01-16 2017-01-16 Procédé de détermination d'informations d'état de canal, dispositif de réseau d'accès et équipement terminal
CN201780083716.4A CN110192367A (zh) 2017-01-16 2017-01-16 确定信道状态信息的方法、接入网设备和终端设备

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