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WO2024234259A1 - Procédé et appareil de communication, et support d'enregistrement - Google Patents

Procédé et appareil de communication, et support d'enregistrement Download PDF

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Publication number
WO2024234259A1
WO2024234259A1 PCT/CN2023/094348 CN2023094348W WO2024234259A1 WO 2024234259 A1 WO2024234259 A1 WO 2024234259A1 CN 2023094348 W CN2023094348 W CN 2023094348W WO 2024234259 A1 WO2024234259 A1 WO 2024234259A1
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WIPO (PCT)
Prior art keywords
codeword
layers
layer
precoding information
indication field
Prior art date
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PCT/CN2023/094348
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English (en)
Chinese (zh)
Inventor
张振宇
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Beijing Xiaomi Mobile Software Co Ltd
Original Assignee
Beijing Xiaomi Mobile Software Co Ltd
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.)
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Publication date
Application filed by Beijing Xiaomi Mobile Software Co Ltd filed Critical Beijing Xiaomi Mobile Software Co Ltd
Priority to PCT/CN2023/094348 priority Critical patent/WO2024234259A1/fr
Priority to CN202380009426.0A priority patent/CN117015939A/zh
Publication of WO2024234259A1 publication Critical patent/WO2024234259A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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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
    • 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

Definitions

  • the present disclosure relates to the field of communications, and in particular to a communication method and device, and a storage medium.
  • MIMO Multiple-Input Multiple-Output
  • the embodiments of the present disclosure provide a communication method and device, and a storage medium.
  • a communication method is provided, the method being executed by a base station, including:
  • the total number of transmission layers is an odd number greater than 1, dividing the total number of transmission layers into a first number of layers and a second number of layers, and a difference between the second number of layers and the first number of layers is 1;
  • Downlink control information DCI including a plurality of precoding information and layer number indication fields is sent to the terminal, where the plurality of precoding information and layer number indication fields are used to indicate the first codeword and the second codeword.
  • a communication method is provided, the method being executed by a terminal, including:
  • a first number of layers and a first transmit precoding matrix indicator TPMI corresponding to a first antenna port group are determined based on the first codeword, and a second number of layers and a second TPMI corresponding to a second antenna port group are determined based on the second codeword, and the energy of the first antenna port group is equal to the energy of the second antenna port group.
  • a communication device is provided, where the device is applied to a base station, including:
  • a division module configured to, in response to determining that the number of antenna ports of the terminal is a first number and the number of port groups is 2, and the total number of transmission layers is an odd number greater than 1, divide the total number of transmission layers into a first number of layers and a second number of layers, and the difference between the second number of layers and the first number of layers is 1;
  • a first determination module is configured to determine a first codeword corresponding to the first number of layers, and determine a second codeword corresponding to the second number of layers, wherein energy of a first antenna port group corresponding to the first codeword is equal to energy of a second antenna port group corresponding to the second codeword;
  • the sending module is configured to send downlink control information DCI including multiple precoding information and layer number indication fields to the terminal, where the multiple precoding information and layer number indication fields are used to indicate the first codeword and the second codeword.
  • a communication device where the device is applied to a terminal, including:
  • a receiving module configured to receive downlink control information DCI including multiple precoding information and a layer number indication field sent by a base station in response to determining that the number of antenna ports is a first number and the number of port groups is 2, and the total number of transmission layers is an odd number greater than 1;
  • a second determination module is configured to determine a first codeword and a second codeword indicated by the plurality of precoding information and layer number indication fields;
  • the third determination module is configured to determine a first number of layers and a first transmit precoding matrix indicator TPMI corresponding to a first antenna port group based on the first codeword, and to determine a second number of layers and a second TPMI corresponding to a second antenna port group based on the second codeword, wherein the energy of the first antenna port group is equal to the energy of the second antenna port group.
  • a communication device including:
  • a memory for storing processor-executable instructions
  • the processor is configured to execute any one of the communication methods described above.
  • the energy of the antenna port groups can be effectively normalized so that the energies of different antenna port groups are the same, thereby minimizing the impact on codeword performance and improving the reliability of MIMO transmission.
  • Fig. 1 is a schematic flow chart of a communication method according to an exemplary embodiment.
  • Fig. 2 is a schematic flow chart of another communication method according to an exemplary embodiment.
  • Fig. 3 is a schematic flow chart of another communication method according to an exemplary embodiment.
  • Fig. 4 is a block diagram of a communication device according to an exemplary embodiment.
  • Fig. 5 is a block diagram of another communication device according to an exemplary embodiment.
  • Fig. 6 is a schematic diagram of the structure of a communication device according to an exemplary embodiment of the present disclosure.
  • Fig. 7 is a schematic diagram of the structure of another communication device according to an exemplary embodiment of the present disclosure.
  • first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other.
  • a first message may also be referred to as a second message, and similarly, a second message may also be referred to as a first message.
  • the word "if” as used herein may be interpreted as "at the time of” or "when” or "in response to determining”.
  • the number of antenna port groups of the terminal is defined, that is, the number of antenna port groups of the terminal is defined as Ng, and the antennas in each antenna port group are fully coherently transmitted, and the antennas between different antenna port groups are incoherently transmitted.
  • the basic design principle is the uplink 4-port fully coherent codeword design based on Release 15 (R15).
  • the partially coherent codeword structure is as follows:
  • the codeword is designed as or Where A is the R15 uplink 4-port fully coherent codeword.
  • A is one of the R15 uplink 4-port 1-layer fully coherent codewords.
  • the codeword is designed as follows: or Among them, A, A1 and A2 are the R15 uplink 4-port fully coherent codewords.
  • rank 2
  • the codeword uses When A is one of the R15 uplink 4-port 2-layer fully coherent codewords.
  • rank 2
  • the codeword uses When the sum of rank(A 1 ) and rank(A 2 ) is equal to rank, then rank(A 1 ) and rank(A 2 ) are both 1. Accordingly, A 1 is one of the R15 uplink 4-port 1-layer fully coherent codewords, and A 2 is one of the R15 uplink 4-port 1-layer fully coherent codewords.
  • the codeword is designed as Where A1 and A2 are the R15 uplink 4-port fully coherent codewords.
  • rank( A1 ) and rank( A2 ) can be 2 and 3, and accordingly, A1 is one of the R15 uplink 4-port 2-layer fully coherent codewords, and A2 is one of the R15 uplink 4-port 3-layer fully coherent codewords.
  • the codeword is A1 is a code word selected from Table 2
  • A2 is a code word selected from Table 3.
  • the base station first determines the 8-port precoding matrix determined for the terminal, and then determines A 1 from Table 2 and A 2 from Table 3 according to the determined matrix.
  • the final codeword is Among them, the energy normalization coefficient of the codeword is n is the number of non-zero elements in the W matrix, that is, the normalized coefficient of the codeword W is This coefficient will result in different energies of the two antenna port groups, that is, the F norms of the two codewords are not equal, where the F norm refers to the Frobenius norm of the matrix, that is, May affect the performance of both codewords.
  • the codeword needs to be designed as:
  • the present disclosure provides the following communication method, device, and storage medium, which can effectively normalize the energy of antenna port groups so that the energies of different antenna port groups are the same, minimize the impact on codeword performance, and improve the reliability of MIMO transmission.
  • FIG. 1 is a flow chart of a communication method according to an embodiment, which can be executed by a base station.
  • the method may include the following steps:
  • step 101 in response to determining that the number of antenna ports of the terminal is a first number and the number of port groups is 2, and the total number of transmission layers is an odd number greater than 1, the total number of transmission layers is divided into a first number of layers and a second number of layers, and the difference between the second number of layers and the first number of layers is 1.
  • the first number is the number of antenna ports deployed on the terminal, which can be a positive integer.
  • it can be 1, 2, 3, etc.
  • the first number is preferably an even number greater than 0, such as 2, 4, 6, 8, . . .
  • the first number is 8, that is, the number of antenna ports of the terminal is 8, the number of port groups Ng is 2, and the total number of transmission layers is an odd number greater than 1, such as 3, 5, 7... for example.
  • the solution of the present disclosure is not limited to the scenario where the number of antenna ports is 8 and the number of port groups is 2, and the total number of transmission layers is an odd number greater than 1. It can be understood that the solution of the present disclosure can also be applied to other scenarios where the energies cannot be equal after normalization.
  • rank(A 1 ) 1
  • rank(A 2 ) 2.
  • rank(A 1 ) 3
  • rank(A 2 ) 4, and so on.
  • step 102 a first codeword corresponding to the first number of layers is determined, and a second codeword corresponding to the second number of layers is determined, and energy of a first antenna port group corresponding to the first codeword is equal to energy of a second antenna port group corresponding to the second codeword.
  • the energy of the antenna port group refers to the transmission power of the antenna port group.
  • the first codeword A1 is one of the fully coherent codewords of the first number of layers with the number of antenna ports being the second number.
  • the second number is the number of ports included in each antenna port group, the second number is half of the first number, and the second number should also be a positive integer.
  • the second number is 4.
  • the second codeword may be one of the partially coherent codewords of the second layer number whose number of antenna ports is the second number.
  • the second codeword A 2 may be one of the 2-layer partially coherent codewords under 4 ports.
  • the number of non-zero elements included in A1 is 4, and the number of non-zero elements included in A2 is also 4, and the F norms of the two are equal, that is, This ensures that the energy of the first antenna port group is equal to the energy of the second antenna port group.
  • the normalized coefficient of codeword W is The characteristics of the codeword elements belonging to the QPSK constellation diagram will not be destroyed.
  • the first codeword A1 is still one of the fully coherent codewords of the first number of layers with the second number of antenna ports.
  • the second codeword A2 may include the third codeword A3 and a fourth codeword A 4 , wherein the third codeword A 3 is one of the fully coherent codewords of the third layer with the second number of antenna ports, and the fourth codeword A 4 is one of the partially coherent codewords of the fourth layer with the second number of antenna ports.
  • the second rank (A 2 ) is divided again into a third rank (A 3 ) and a fourth rank (A 4 ); the third rank (A 3 ) and the fourth rank (A 4 ) may be equal, or the difference between the fourth rank (A 4 ) and the third rank (A 3 ) is 1.
  • the number of non-zero elements included in A1 is 8, and the number of non-zero elements included in A2 is also 8, and the F norms of the two are equal, that is, This ensures that the energy of the first antenna port group is equal to the energy of the second antenna port group.
  • the normalized coefficient of codeword W is The characteristics of the codeword elements belonging to the QPSK constellation diagram will not be destroyed.
  • the second layer number rank( A2 ) is divided again, rank( A3 ) and rank( A4 ) are equal, both 2.
  • the first codeword A1 is one of the fully coherent codewords of the 3 layers under the 4 ports
  • the third codeword A3 is one of the fully coherent codewords of the 2 layers under the 4 ports
  • the fourth codeword A4 is one of the partially coherent codewords of the 2 layers under the 4 ports.
  • the final code word is:
  • the number of non-zero elements in A1 is 12, and the number of non-zero elements in A2 is also 12, and the F norms of the two are equal, that is, This ensures that the energy of the first antenna port group is equal to the energy of the second antenna port group.
  • the normalized coefficient of codeword W is The characteristics of the codeword elements belonging to the QPSK constellation diagram will not be destroyed.
  • the first codeword and the second codeword determined in the above manner need to be arranged to correspond to the correct port. That is, when the number of antenna ports is 8, the antenna port numbers included in each antenna port group are not limited.
  • the codeword is designed as follows:
  • the codeword is designed as follows:
  • the codeword can be designed as:
  • the codeword may have other forms as long as it can correspond to the correct port, and the present disclosure does not limit this.
  • a new codebook may be agreed upon by a protocol, and a new codebook table may be generated for all codewords that may correspond to the first codeword and the second codeword to obtain a first codebook.
  • the base station selects the first codeword and the second codeword for the terminal in the first codebook to form a precoding matrix.
  • the first codebook includes: fully coherent codewords whose number of antenna ports is the second number; partially coherent codewords whose number of antenna ports is the second number; a combination of fully coherent codewords whose number of antenna ports is the second number and partially coherent codewords whose number of antenna ports is the second number; an empty matrix; and a combination of an empty matrix and partially coherent codewords whose number of antenna ports is the second number.
  • the first codebook specifically includes: fully coherent codewords under 4 ports; partially coherent codewords under 4 ports; a combination of fully coherent codewords under 4 ports and partially coherent codewords under 4 ports; an empty matrix; and a combination of an empty matrix and partially coherent codewords under 4 ports.
  • two new codebooks may be agreed upon, the second codebook includes all possible codewords corresponding to the first codeword, and the third codebook may include all possible codewords for the second codeword.
  • the second codebook may include all 4-port fully coherent codewords and an empty matrix.
  • the third codebook may include: partially coherent codewords under 4 ports; a combination of fully coherent codewords under 4 ports and partially coherent codewords under 4 ports; and a combination of an empty matrix and partially coherent codewords under 4 ports.
  • the second codebook and the third codebook may be agreed upon by a protocol, the base station selects a first codeword for the terminal in the second codebook, and indicates the base station to select a second codeword for the terminal in the third codebook.
  • new codebooks may be respectively set for the first codeword, the third codeword, and the fourth codeword, and the base station selects a corresponding codeword for the terminal in the corresponding codebook.
  • the implementation manner is similar to the above manner and will not be repeated here.
  • a new codebook may not be agreed upon, but an existing codebook may be reused, and the base station selects the first codeword, the second codeword, the third codeword or the fourth codeword for the terminal in the existing codebook.
  • the existing codebook does not include an empty matrix
  • the base station may inform the terminal that the corresponding codeword is an empty matrix by indicating that the codeword is a reserved codeword in the existing codebook.
  • step 103 downlink control information DCI including a plurality of precoding information and layer number indication fields is sent to the terminal, where the plurality of precoding information and layer number indication fields are used to indicate the first codeword and the second codeword.
  • downlink control information may include multiple transmission precoding information and layer number indication fields, and the transmission precoding information and layer number indication fields may jointly indicate a transmission layer number indicator (Transmit Rank Indicator, TRI) and a TPMI.
  • TRI corresponds to indicating the first layer number or the second layer number, respectively.
  • the number of the multiple precoding information and layer number indication fields is 2, including a first precoding information and layer number indication field and a second precoding information and layer number indication field, which are used to indicate the first codeword and the second codeword determined in step 102, respectively.
  • the first precoding information and the layer number indication field may be used to indicate any of the following: one of the fully coherent codewords under 4 ports, or an empty matrix.
  • the second precoding information and the layer number indication field can be used to indicate any of the following: one of the partially coherent codewords under 4 ports; one of the combinations of the fully coherent codewords under 4 ports and the partially coherent codewords under 4 ports; one of the combinations of the empty matrix and the partially coherent codewords under 4 ports.
  • the number of the plurality of precoding information and layer number indication fields is 3, including a first precoding information and layer number indication field, a third precoding information and layer number indication field, and a fourth precoding information and layer number indication field.
  • the first precoding information and layer number indication field are used to indicate the first codeword
  • the third precoding information and layer number indication field and the fourth precoding information and layer number indication field are used to indicate the second codeword.
  • the first precoding information and the layer number indication field may be used to indicate any of the following: one of the fully coherent codewords under 4 ports, or an empty matrix.
  • the third precoding information and layer number indication field are used to indicate the second codeword
  • the fourth precoding information and layer number indication field are used to indicate an empty matrix
  • the third precoding information and layer number indication field can be used to indicate at least one of the following: one of the partially coherent codewords under 4 ports; one of the combinations of fully coherent codewords under 4 ports and partially coherent codewords under 4 ports; one of the combinations of an empty matrix and partially coherent codewords under 4 ports.
  • the third precoding information and the layer number indication field are used to indicate a third codeword
  • the fourth precoding information and the layer number indication field are used to indicate a fourth codeword
  • the third precoding information and layer number indication field can be used to indicate one of the 4-port fully coherent codewords or an empty matrix.
  • the fourth precoding information and layer number indication field can be used to indicate one of the 4-port partially coherent codewords or an empty matrix.
  • the third precoding information and layer number indication field are used to indicate an empty matrix
  • the fourth precoding information and layer number indication field are used to indicate a second codeword.
  • the fourth precoding information and layer number indication field can be used to indicate at least one of the following: one of the partially coherent codewords under 4 ports; one of the combinations of fully coherent codewords under 4 ports and partially coherent codewords under 4 ports; one of the combinations of an empty matrix and partially coherent codewords under 4 ports.
  • the base station may set the codeword in the third precoding information and layer number indication field or the fourth precoding information and layer number indication field to a reserved codeword in an existing codebook, thereby indicating that the corresponding codeword is an empty matrix.
  • the energy of the antenna port groups can be effectively normalized so that the energies of different antenna port groups are the same, thereby minimizing the impact on codeword performance and improving the reliability of MIMO transmission.
  • FIG. 2 is a flow chart of a communication method according to an embodiment, which can be executed by a terminal.
  • the method may include the following steps:
  • step 201 in response to determining that the number of antenna ports is a first number and the number of port groups is 2, and the total number of transmission layers is an odd number greater than 1, downlink control information DCI including multiple precoding information and layer number indication fields sent by a base station is received.
  • the first number is the number of antenna ports deployed on the terminal, which can be a positive integer, such as 1, 2, 3, ...
  • the first number is preferably an even number greater than 0, such as 2, 4, 6, 8, . . .
  • the first number is 8, that is, the number of antenna ports of the terminal is 8, the number of port groups Ng is 2, and the total number of transmission layers is an odd number greater than 1, such as 3, 5, 7... For example, description is given.
  • the solution of the present disclosure is not limited to the scenario where the number of antenna ports is 8 and the number of port groups is 2, and the total number of transmission layers is an odd number greater than 1. It can be understood that the solution of the present disclosure can also be applied to other scenarios where the energies cannot be equal after normalization.
  • the DCI sent by the base station may include multiple transmission precoding information and layer number indication fields, and the transmission precoding information and layer number indication fields may jointly indicate TRI and TPMI, wherein TRI corresponds to indicating the first layer number or the second layer number, respectively.
  • step 202 a plurality of first code words and a second code word indicated by the precoding information and layer number indication fields are determined.
  • the number of the multiple precoding information and layer indication fields is 2, including: first precoding information and layer indication field, the first precoding information and layer indication field are used to indicate the first codeword; second precoding information and layer indication field, the second precoding information and layer indication field are used to indicate the second codeword.
  • the terminal may determine the first codeword based on the first precoding information and the layer number indication field, and determine the second codeword based on the second precoding information and the layer number indication field.
  • the number of the plurality of precoding information and layer number indication fields is 3, including: a first precoding information and layer number indication field, where the first precoding information and layer number indication field are used to indicate the first codeword;
  • a third precoding information and layer number indication field
  • the fourth precoding information and layer number indication field, the third precoding information and layer number indication field and the fourth precoding information and layer number indication field are used to indicate the second codeword.
  • the terminal may determine the first codeword based on the first precoding information and the layer number indication field, and jointly determine the second codeword based on the third precoding information and the layer number indication field and the fourth precoding information and the layer number indication field.
  • the third precoding information and the layer number indication field indicate the second codeword
  • the fourth precoding information and the layer number indication field indicate an empty matrix.
  • the terminal determines the second codeword based on the third precoding information and the layer number indication field.
  • the third precoding information and the layer number indication field indicate a third codeword
  • the fourth precoding information and the layer number indication field indicate a fourth codeword
  • the second codeword includes the third codeword and the fourth codeword.
  • the third precoding information and layer number indication field indicates an empty matrix
  • the fourth precoding information and layer number indication field indicates an empty matrix.
  • the coding information and the layer number indication field indicate the second codeword.
  • the terminal determines the second codeword based on the fourth precoding information and the layer number indication field.
  • a first number of layers and a first transmit precoding matrix indicator TPMI corresponding to a first antenna port group are determined based on the first codeword
  • a second number of layers and a second TPMI corresponding to a second antenna port group are determined based on the second codeword, and the energy of the first antenna port group is equal to the energy of the second antenna port group.
  • the first codeword is one of the fully coherent codewords of the first number of layers with the number of antenna ports being the second number.
  • the second codeword is one of the partially coherent codewords of the second layer number with the second number of antenna ports.
  • the second codeword when the total number of transmission layers is greater than 3, includes: a third codeword, which is one of the fully coherent codewords of the third layer number whose number of antenna ports is the second number; and a fourth codeword, which is one of the partially coherent codewords of the fourth layer number whose number of antenna ports is the second number; wherein the third number of layers is equal to the fourth number of layers, or the difference between the fourth number of layers and the third number of layers is 1.
  • the second number is the number of ports included in each antenna port group, and the second number is half of the first number, that is, the second number should also be a positive integer.
  • the second number is 4.
  • the terminal may determine that both the first codeword and the second codeword are determined based on the first codebook.
  • the terminal may search the first codebook to determine the number of transmission layers and TPMI corresponding to the first codeword, determine the number of transmission layers corresponding to the first codeword as the first number of layers, and determine the TPMI corresponding to the first codeword as the first TPMI.
  • the terminal may search the first codebook to determine the number of transmission layers and TPMI corresponding to the second codeword, determine the number of transmission layers corresponding to the second codeword as the second number of layers, and determine the TPMI corresponding to the second codeword as the second TPMI.
  • the first codebook includes all possible corresponding codewords of the first codeword and the second codeword, and specifically may include: fully coherent codewords under 4 ports; partially coherent codewords under 4 ports; a combination of fully coherent codewords under 4 ports and partially coherent codewords under 4 ports; an empty matrix; and a combination of an empty matrix and partially coherent codewords under 4 ports.
  • the terminal may determine that the first codeword is determined based on the second codebook, and the second codeword is determined based on the third codebook.
  • the terminal may search the second codebook to determine the number of transmission layers and TPMI corresponding to the first codeword, determine the number of transmission layers corresponding to the first codeword as the first number of layers, and determine the TPMI corresponding to the first codeword as the first TPMI.
  • the terminal may search the third codebook to determine the number of transmission layers and TPMI corresponding to the second codeword, determine the number of transmission layers corresponding to the second codeword as the second number of layers, and determine the TPMI corresponding to the second codeword as the second TPMI.
  • the second codebook includes all possible codewords corresponding to the first codeword, and may specifically include: Fully coherent codewords under 4 ports; and an empty matrix.
  • the third codebook may include all possible codewords corresponding to the second codeword, specifically including: partially coherent codewords under 4 ports; a combination of fully coherent codewords under 4 ports and partially coherent codewords under 4 ports; and a combination of an empty matrix and partially coherent codewords under 4 ports.
  • the terminal determines that the first codeword is determined based on the second codebook, and the third codeword and the fourth codeword are determined based on different codebooks.
  • the terminal searches the corresponding codebook to determine the corresponding codeword, wherein after the third codeword and the fourth codeword are determined, the second codeword including the third codeword and the fourth codeword can be determined.
  • the terminal determines that the first codeword and the second codeword are both determined based on an existing codebook.
  • the terminal searches the existing codebook to determine the number of transmission layers and TPMI corresponding to the first codeword, thereby determining the first number of layers and the first TPMI, and determines the number of transmission layers and TPMI corresponding to the second codeword, thereby determining the second number of layers and the second TPMI.
  • the terminal determines that any codeword is a reserved codeword, the terminal determines that the corresponding codeword is an empty matrix.
  • the terminal can determine the codeword corresponding to each antenna port group based on the DCI sent by the base station, wherein, since the F norm of the codeword is limited to be equal on the base station side, it can ensure that the energy of each antenna port group is equal, thereby achieving the purpose of normalizing the energy of the antenna port group and improving the reliability of MIMO transmission.
  • FIG. 3 is a flow chart of a communication method according to an embodiment, and the method may include the following steps:
  • step 301 in response to determining that the number of antenna ports of the terminal is a first number and the number of port groups is 2, and the total number of transmission layers is an odd number greater than 1, the base station divides the total number of transmission layers into a first number of layers and a second number of layers, and the difference between the second number of layers and the first number of layers is 1.
  • step 301 is similar to that of step 101 above, and will not be repeated here.
  • the base station determines a first codeword corresponding to the first number of layers and determines a second codeword corresponding to the second number of layers, and the energy of the first antenna port group corresponding to the first codeword is equal to the energy of the second antenna port group corresponding to the second codeword.
  • step 302 is similar to that of step 102 above, and will not be repeated here.
  • step 303 the base station sends downlink control information DCI including multiple precoding information and layer number indication fields to the terminal, where the multiple precoding information and layer number indication fields are used to indicate the first codeword and the second codeword.
  • step 303 is similar to that of the above step 103 and will not be repeated here.
  • step 304 the terminal determines a first codeword and a second codeword indicated by the plurality of precoding information and layer number indication fields.
  • step 304 is similar to that of step 202, and will not be described in detail here.
  • the terminal determines a first number of layers and a first transmit precoding matrix indicator TPMI corresponding to a first antenna port group based on the first codeword, and determines a second number of layers and a second TPMI corresponding to a second antenna port group based on the second codeword.
  • step 305 is similar to that of step 203 above, and will not be described in detail here.
  • the terminal After the terminal determines the number of transmission layers and TPMI corresponding to each antenna port group, it can be mapped to the corresponding antenna port and communicate with the base station using the corresponding TPMI.
  • the energy of the antenna port groups can be effectively normalized so that the energies of different antenna port groups are the same, thereby minimizing the impact on codeword performance and improving the reliability of MIMO transmission.
  • the present disclosure is described by taking the case where the number of antenna ports is 8, the number of port groups is 2, and the total number of transmission layers is 3, 5, and 7 as an example.
  • Example 1 when the rank is equal to 3, it can be divided into a first layer and a second layer, where the first layer is 1 and the second layer is 2.
  • the corresponding codeword is A1 is the fully coherent codeword of the 1st layer of the 4 upstream ports of R15, and A2 is the partially coherent codeword of the 2nd layer of the 4 upstream ports of R15.
  • the final codeword is:
  • the code can also be It specifically depends on the antenna port sequence numbers included in each antenna port group.
  • Example 2 When the rank number is 5, it can be divided into the first and second levels. The first level is 2 and the second level is 3. The second level is further divided to determine that the third level is 1 and the fourth level is 2.
  • the codeword is Among them, A1 is the R15 uplink 4-port 2-layer fully coherent codeword, A3 is the R15 uplink 4-port 1-layer fully coherent codeword, and A4 is the R15 uplink 4-port 2-layer partially coherent codeword.
  • the final codeword is:
  • codeword can also be This disclosure is not limited to this.
  • Example 3 When the rank number is 7, the first level is 3, the second level is 4, the second level is further divided into the third level and the fourth level, the third level and the fourth level are both 2, and the codeword is Among them, A1 is the R15 uplink 4-port 2-layer fully coherent codeword, A3 is the R15 uplink 4-port 2-layer fully coherent codeword, A4 is the R15 uplink 4-port 2-layer partially coherent codeword, and the final codeword is:
  • codeword can also be This disclosure is not limited to this.
  • the DCI may indicate the first codeword and the second codeword in the following manner:
  • Method 1 Generate all possible codewords corresponding to the first codeword and the second codeword, put them in a table of the first codebook, and indicate the first codeword and the second codeword through two precoding information and layer number indication fields.
  • the first codebook includes: fully coherent codewords whose number of antenna ports is the second number; partially coherent codewords whose number of antenna ports is the second number; a combination of fully coherent codewords whose number of antenna ports is the second number and partially coherent codewords whose number of antenna ports is the second number; an empty matrix; and a combination of an empty matrix and partially coherent codewords whose number of antenna ports is the second number.
  • Method 2 all possible codewords corresponding to the first codeword and the second codeword are generated, and are placed in the tables of the second codebook and the third codebook respectively, and the first codeword and the second codeword are indicated by two precoding information and layer number indication fields.
  • the number of precoding information and layer indication fields is still 2
  • the first precoding information and layer indication field is used to indicate the first codeword
  • the second precoding information and layer indication field is used to indicate all possible codewords of the second codeword.
  • the second codebook includes: fully coherent codewords under 4 ports; and an empty matrix.
  • the third codebook includes: partially coherent codewords under 4 ports; a combination of fully coherent codewords under 4 ports and partially coherent codewords under 4 ports; and a combination of an empty matrix and partially coherent codewords under 4 ports.
  • Method 3 regardless of whether the codebook is a newly generated codebook (such as the first codebook, the second codebook, the third codebook, etc.) or an existing codebook, the number of precoding information and layer indication fields can be 3, and the first precoding information and layer indication field is used to indicate the first codeword, including all 4-port fully coherent codewords and empty matrices.
  • the third precoding information and layer indication field and the fourth precoding information and layer indication field are used to jointly indicate the second codeword.
  • the third precoding information and the layer number indication field indicate the second codeword
  • the fourth precoding The code information and the layer number indication field indicate an empty matrix; or, the third precoding information and the layer number indication field indicate a third codeword, the fourth precoding information and the layer number indication field indicate a fourth codeword, and the second codeword includes the third codeword and the fourth codeword; or, the third precoding information and the layer number indication field indicate an empty matrix, and the fourth precoding information and the layer number indication field indicate the second codeword.
  • the energy of the antenna port groups can be effectively normalized so that the energies of different antenna port groups are the same, thereby minimizing the impact on codeword performance and improving the reliability of MIMO transmission.
  • the present disclosure also provides an application function implementation device embodiment.
  • FIG. 4 is a block diagram of a communication device according to an exemplary embodiment, wherein the device is applied to a base station and includes:
  • the division module 401 is configured to, in response to determining that the number of antenna ports of the terminal is a first number and the number of port groups is 2, and the total number of transmission layers is an odd number greater than 1, divide the total number of transmission layers into a first number of layers and a second number of layers, and the difference between the second number of layers and the first number of layers is 1;
  • a first determining module 402 is configured to determine a first codeword corresponding to the first number of layers, and determine a second codeword corresponding to the second number of layers, wherein energy of a first antenna port group corresponding to the first codeword is equal to energy of a second antenna port group corresponding to the second codeword;
  • the sending module 403 is configured to send downlink control information DCI including multiple precoding information and layer number indication fields to the terminal, where the multiple precoding information and layer number indication fields are used to indicate the first codeword and the second codeword.
  • FIG. 5 is a block diagram of a communication device according to an exemplary embodiment, wherein the device is applied to a terminal and includes:
  • the receiving module 501 is configured to receive downlink control information DCI including multiple precoding information and a layer number indication field sent by a base station in response to determining that the number of antenna ports is a first number and the number of port groups is 2, and the total number of transmission layers is an odd number greater than 1;
  • a second determination module 502 is configured to determine a first codeword and a second codeword indicated by the plurality of precoding information and layer number indication fields;
  • the third determination module 503 is configured to determine a first number of layers and a first transmit precoding matrix indicator TPMI corresponding to the first antenna port group based on the first codeword, and to determine a second number of layers and a second TPMI corresponding to the second antenna port group based on the second codeword, and the energy of the first antenna port group is equal to the energy of the second antenna port group.
  • the relevant parts can refer to the partial description of the method embodiments.
  • the device embodiments described above are only schematic, wherein the units described above 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, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the disclosed solution. A person of ordinary skill in the art may understand and implement it without creative work.
  • a communication device comprising:
  • a memory for storing processor-executable instructions
  • the processor is configured to execute any of the communication methods described above on the terminal side.
  • Fig. 6 is a block diagram of an electronic device 600 according to an exemplary embodiment.
  • the electronic device 600 may be a mobile phone, a tablet computer, an e-book reader, a multimedia player, a wearable device, a vehicle-mounted terminal, an iPad, a smart TV, or other terminals.
  • the electronic device 600 may include one or more of the following components: a processing component 602 , a memory 604 , a power component 606 , a multimedia component 608 , an audio component 610 , an input/output (I/O) interface 612 , a sensor component 616 , and a communication component 618 .
  • the processing component 602 generally controls the overall operation of the electronic device 600, such as operations associated with display, phone calls, data communications, camera operations, and recording operations.
  • the processing component 602 may include one or more processors 620 to execute instructions to complete all or part of the steps of the above-mentioned communication method.
  • the processing component 602 may include one or more modules to facilitate the interaction between the processing component 602 and other components.
  • the processing component 602 may include a multimedia module to facilitate the interaction between the multimedia component 608 and the processing component 602.
  • the processing component 602 can read executable instructions from a memory to implement the steps of a communication method provided in the above-mentioned embodiments.
  • the memory 604 is configured to store various types of data to support operations on the electronic device 600. Examples of such data include instructions for any application or method operating on the electronic device 600, contact data, phone book data, messages, pictures, videos, etc.
  • the memory 604 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read-only memory
  • EPROM erasable programmable read-only memory
  • PROM programmable read-only memory
  • ROM read-only memory
  • magnetic memory flash memory
  • flash memory magnetic disk or optical disk.
  • the power supply component 606 provides power to the various components of the electronic device 600.
  • the power supply component 606 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the electronic device 600.
  • the multimedia component 608 includes a display screen that provides an output interface between the electronic device 600 and the user.
  • the multimedia component 608 includes a front camera and/or a rear camera.
  • the front camera and/or the rear camera can receive external multimedia data.
  • Each front camera and rear camera can be a fixed optical lens system or have a focal length and optical zoom capability.
  • the audio component 610 is configured to output and/or input audio signals.
  • the audio component 610 includes a microphone (MIC), and when the electronic device 600 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive an external audio signal.
  • the received audio signal can be further stored in the memory 604 or sent via the communication component 618.
  • the audio component 610 also includes a speaker for outputting audio signals.
  • I/O interface 612 provides an interface between processing component 602 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: Page button, volume button, start button and lock button.
  • the sensor assembly 616 includes one or more sensors for providing various aspects of status assessment for the electronic device 600.
  • the sensor assembly 616 can detect the open/closed state of the electronic device 600, the relative positioning of the components, such as the display and keypad of the electronic device 600, and the sensor assembly 616 can also detect the position change of the electronic device 600 or a component of the electronic device 600, the presence or absence of contact between the user and the electronic device 600, the orientation or acceleration/deceleration of the electronic device 600, and the temperature change of the electronic device 600.
  • the sensor assembly 616 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact.
  • the sensor assembly 616 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications.
  • the sensor assembly 616 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
  • the communication component 618 is configured to facilitate wired or wireless communication between the electronic device 600 and other devices.
  • the electronic device 600 can access a wireless network based on a communication standard, such as Wi-Fi, 2G, 3G, 4G or 5G, or a combination thereof.
  • the communication component 618 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel.
  • the communication component 618 also includes a near field communication (NFC) module to facilitate short-range communication.
  • the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.
  • RFID radio frequency identification
  • IrDA infrared data association
  • UWB ultra-wideband
  • Bluetooth Bluetooth
  • the electronic device 600 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-mentioned communication methods.
  • ASICs application-specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • controllers microcontrollers, microprocessors, or other electronic components to perform the above-mentioned communication methods.
  • a non-transitory machine-readable storage medium including instructions is also provided, such as a memory 604 including instructions, and the instructions can be executed by a processor 620 of an electronic device 600 to perform the above communication method.
  • the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.
  • a communication device comprising:
  • a memory for storing processor-executable instructions
  • the processor is configured to execute any of the communication methods described above on the base station side.
  • FIG. 7 is a schematic diagram of a structure of a communication device 700 according to an exemplary embodiment.
  • the device 700 may be provided as a base station.
  • the device 700 includes a processing component 722, a wireless transmission/reception component 724, an antenna component 726, and a signal processing part specific to a wireless interface, and the processing component 722 may further include at least one processor.
  • One of the processors in the processing component 722 may be configured to execute any of the communication methods described above.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)

Abstract

La présente divulgation concerne un procédé et un appareil de communication, et un support d'enregistrement. Le procédé consiste à : en réponse à la détermination du fait que le nombre de ports d'antenne d'un terminal correspond à un premier nombre, le nombre de groupes de ports correspond à deux, et le nombre total de couches de transmission correspond à un nombre impair supérieur à un, diviser le nombre total de couches de transmission en un premier nombre de couches et un second nombre de couches, la différence entre le second nombre de couches et le premier nombre de couches étant égale à un ; déterminer un premier mot de code correspondant au premier nombre de couches, et déterminer un second mot de code correspondant au second nombre de couches, l'énergie d'un premier groupe de ports d'antenne correspondant au premier mot de code étant égale à l'énergie d'un second groupe de ports d'antenne correspondant au second mot de code ; et envoyer au terminal des DCI comprenant de multiples éléments d'informations de précodage et un domaine d'indication du nombre de couches, les multiples éléments d'informations de précodage et le domaine d'indication du nombre de couches étant utilisés pour indiquer le premier mot de code et le second mot de code. La présente divulgation peut normaliser efficacement l'énergie des groupes de ports d'antenne, de telle sorte que l'énergie de différents groupes de ports d'antenne est la même et l'influence sur les performances de mot de code est évitée autant que possible, ce qui permet d'améliorer la fiabilité de transmission MIMO.
PCT/CN2023/094348 2023-05-15 2023-05-15 Procédé et appareil de communication, et support d'enregistrement Pending WO2024234259A1 (fr)

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