CN117015939A - Communication method and device and storage medium - Google Patents

Abstract

The present disclosure provides a communication method, device, and storage medium. The method includes: 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, adding the total The number of transmission layers is divided into the first layer number and the second layer number. The difference between the second layer number and the first layer number is 1; determine the first codeword corresponding to the first layer number, and determine the corresponding codeword of the second layer number. The second codeword, 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; sending a plurality of precoding information and a layer indication field to the terminal The DCI, multiple precoding information and layer number indication fields are used to indicate the first codeword and the second codeword. The present disclosure can effectively normalize the energy of the antenna port group so that the energy of different antenna port groups is the same, thereby avoiding the impact on codeword performance and improving the reliability of MIMO transmission.

Description

Communication method, device, and storage medium

Technical Field

The present disclosure relates to the field of communications, and in particular to a communication method and device, and a storage medium.

Background Art

In the study of multiple-input multiple-output (MIMO) uplink 8-port transmission enhancement in Release 18 (R18), relevant discussions were conducted on the full coherent codebook design, partial coherent codebook design, and codeword indication scheme.

The discussion found that when the number of antenna ports is 8 and the number of port groups is 2, and the number of transmission layers is an odd number greater than 1, if the encoded codewords are normalized, the energies of the two antenna port groups will be different, which may affect the codeword performance.

Summary of the invention

In order to overcome the problems existing in the related art, the embodiments of the present disclosure provide a communication method and device, and a storage medium.

According to a first aspect of an embodiment of the present disclosure, a communication method is provided, the method being executed by a base station, including:

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, 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;

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;

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.

According to a second aspect of an embodiment of the present disclosure, a communication method is provided, the method being executed by a terminal, including:

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, receiving downlink control information DCI including multiple precoding information and a layer number indication field sent by a base station;

Determine a first codeword and a second codeword indicated by the plurality of precoding information and layer number indication fields;

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.

According to a third aspect of an embodiment of the present disclosure, a communication device is provided, where the device is applied to a base station, including:

A division module 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 determination module is configured to determine a first codeword corresponding to the first number of layers, and to 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.

According to a fourth aspect of an embodiment of the present disclosure, a communication device is provided, 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.

According to a fifth aspect of an embodiment of the present disclosure, a communication device is provided, including:

processor;

a memory for storing processor-executable instructions;

The processor is configured to execute any one of the communication methods described above.

The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

In the present disclosure, when the number of antenna ports of the terminal is the first number and the number of port groups is 2, and the number of transmission layers is an odd number greater than 1, 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.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

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.

DETAILED DESCRIPTION

Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and/or" used herein refers to and includes any or all possible combinations of at least one associated listed item.

It should be understood that although the terms 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. For example, without departing from the scope of the present disclosure, 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. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

In R18, 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.

When the terminal is a fully coherent terminal, Ng=1; when the terminal is a partially coherent terminal, Ng=2, that is, the 8 antenna ports can be divided into 2 antenna port groups; when the terminal is a partially coherent terminal, Ng=4, that is, the 8 antenna ports can be divided into 4 antenna port groups.

Among them, for the partially coherent codeword with Ng=2, the basic design principle is the uplink 4-port fully coherent codeword design based on Release 15 (R15). When the number of antenna ports is Ng=2, the partially coherent codeword structure is as follows:

When the number of transmission layers rank = 1, the codeword is designed as or Where A is the R15 uplink 4-port fully coherent codeword. Exemplarily, at this time, A is one of the R15 uplink 4-port 1-layer fully coherent codewords.

When the number of transmission layers is rank = 2, 3, or 4, the codeword is designed as follows: or Among them, A, _A1 and _A2 are the R15 uplink 4-port fully coherent codewords.

For example, rank=2, the codeword uses When A is one of the R15 uplink 4-port 2-layer fully coherent codewords.

For example, 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.

For example, rank=3, the codeword uses When A is one of the R15 uplink 4-port 3-layer fully coherent codewords.

For example, rank=3, the codeword uses When the sum of rank(A ₁ ) and rank(A ₂ ) is equal to rank, then rank(A ₁ ) is 1, rank(A ₂ ) is 2, and accordingly, A ₁ is one of the 1-layer fully coherent codewords of the R15 uplink 4 ports, and A ₂ is one of the 2-layer fully coherent codewords of the R15 uplink 4 ports. Or when rank(A ₁ ) is 2, rank(A ₂ ) is 1, A ₁ is one of the 1-layer fully coherent codewords of the R15 uplink 4 ports, and A ₂ is one of the 2-layer fully coherent codewords of the R15 uplink 4 ports.

For example, when rank=4, A, _A1 and _A2 can be determined accordingly in the above manner, which will not be described in detail here.

When the number of transmission layers rank>4, the codeword is designed as Where _A1 and _A2 are the R15 uplink 4-port fully coherent codewords.

For example, when the number of transmission layers rank=5, 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.

It should also be noted that the fully coherent codewords of different layers of the R15 uplink 4 ports are shown in Tables 1 to 4 below:

Table 1 R15 uplink 4-port 1-layer fully coherent codewords (16 in total)

Table 2 R15 uplink 4-port 2-layer fully coherent codewords (8 in total)

Table 3 R15 uplink 4-port 3-layer fully coherent codewords (4 in total)

Table 4 R15 uplink 4-port 4-layer fully coherent codewords (2 in total)

For example, when the number of transmission layers is rank=5, and the number of transmission layers is divided into 2+3, that is, rank(A ₁ ) and rank(A ₂ ) are 2 and 3, the codeword is _A1 is a code word selected from Table 2, and _A2 is a code word selected from Table 3.

For the base station, 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.

For example, 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.

If the energy of the two antenna port groups needs to be equal, that is, the F norms of the two codewords are equal, The codeword needs to be designed as:

However, since the numbers of non-zero elements included in the two code words are different, the characteristic that the code word elements belong to the QPSK constellation diagram will be destroyed.

In addition, when the number of transmission layers is an odd number greater than 1, such as rank 3, 7, etc., there is a similar energy normalization problem, and the codebook design needs to be improved.

In order to solve the above technical problems, 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.

The communication method provided by the present disclosure is first introduced from the base station side.

An embodiment of the present disclosure provides a communication method, as shown in FIG. 1 , which 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:

In 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.

In the embodiment of the present disclosure, the first number is the number of antenna ports deployed on the terminal, which can be a positive integer. For example, it can be 1, 2, 3, etc.

In the present disclosure, when the number of port groups is 2, the first number is preferably an even number greater than 0, such as 2, 4, 6, 8, . . .

In the embodiment of the present disclosure, 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.

It should be noted that 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.

In the embodiment of the present disclosure, since the total number of transmission layers rank is an odd number, it can be divided into a first number of layers rank (A ₁ ) and a second number of layers rank (A ₂ ), wherein rank (A ₂ )-rank (A ₁ )=1.

For example, if rank=3, then rank(A ₁ )=1, and rank(A ₂ )=2.

For another example, if rank=5, then rank(A ₁ )=2, and rank(A ₂ )=3.

For another example, if rank=7, then rank(A ₁ )=3, rank(A ₂ )=4, and so on.

In 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.

In the embodiment of the present disclosure, the energy of the antenna port group refers to the transmission power of the antenna port group.

In a possible implementation, 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.

Exemplarily, when the number of antenna ports of the terminal, that is, the first number, is 8, and the number of port groups is 2, the second number is 4.

For example, if the first rank (A ₁ ) = 1, any codeword in Table 1 can be selected as A ₁ . If the first rank (A ₁ ) = 2, any codeword in Table 2 can be selected as A ₁ . If the first rank (A ₁ ) = 3, any codeword in Table 3 can be selected as A ₁ , and so on.

In the embodiment of the present disclosure, if the total number of transmission layers rank=3, 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.

For example, rank=3, the second layer number rank (A ₂ )=2, then the second codeword A ₂ may be one of the 2-layer partially coherent codewords under 4 ports.

Assume that the first codeword Second code word

Correspondingly, when rank=3, the codeword After determining the first codeword and the second codeword, the final codeword

Among them, 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.

In addition, the normalization coefficient of codeword W is The characteristics of the codeword elements belonging to the QPSK constellation diagram will not be destroyed.

In another possible implementation, if the total number of transmission layers rank>3, for example, rank=5 or rank=7..., the first codeword _A1 is still one of the fully coherent codewords of the first layer with the second number of antenna ports. At this time, the second codeword _A2 may include a third codeword _A3 and a fourth codeword _A4 , wherein the third codeword _A3 is one of the fully coherent codewords of the third layer with the second number of antenna ports, and the fourth codeword _A4 is one of the partially coherent codewords of the fourth layer with the second number of antenna ports.

That is, 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.

For example, rank=5, then rank( _A2 )=3, further, rank( _A3 )=1, rank( _A4 )=2, the third codeword _A3 is one of the 1-layer fully coherent codewords under 4 ports, and the fourth codeword _A4 is one of the 2-layer partially coherent codewords under 4 ports.

Correspondingly, when rank = 5, the codeword After determining A ₁ , A ₃ , A ₄ (the second codeword A ₂ includes A ₃ and A ₄ ), the final codeword is:

Among them, 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.

In addition, the normalization coefficient of codeword W is The characteristics of the codeword elements belonging to the QPSK constellation diagram will not be destroyed.

For rank=7, the method of determining the codeword is similar to that for rank=5. At this time, rank( _A1 )=3, rank( _A2 )=4. 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, and the fourth codeword _A4 is one of the partially coherent codewords of the 2 layers under the 4 ports. The codewords After the first code word, the third code word and the fourth code word are determined, the final code word is:

Obviously, 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.

In addition, the normalization coefficient of codeword W is The characteristics of the codeword elements belonging to the QPSK constellation diagram will not be destroyed.

The above is only an exemplary description, and 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.

Exemplarily, taking rank=3 as an example, when the first antenna port group includes antenna port #1 to antenna port #4, and the second antenna port group includes antenna port #5 to antenna port #8, the codeword is designed as follows:

For another example, when the first antenna port group includes antenna port #5 to antenna port #8 and the second antenna port group includes antenna port #0 to antenna port #4, the codeword is designed as follows:

For another example, assuming that the first antenna port group includes antenna port #1, antenna port #3, antenna port #5, and antenna port #7, and the second antenna port group includes antenna port #2, antenna port #4, antenna port #6, and antenna port #8, 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.

In a possible implementation, 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.

When the second number is 4, 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.

In another possible implementation, 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.

Exemplarily, the second codebook may include all 4-port fully coherent codewords and an empty matrix.

Exemplarily, 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.

In the present disclosure, 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.

In another possible implementation manner, 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.

In another possible implementation, 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.

Exemplarily, the existing codebook does not include an empty matrix, and 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.

In 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.

In the disclosed embodiment, the downlink control information (DCI) may include multiple transmission precoding information and layer number indication fields, and the transmission precoding information and layer number indication fields may jointly indicate the transmission layer number indicator (TRI) and TPMI. Among them, TRI corresponds to the first layer number or the second layer number.

In a possible implementation, 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.

Exemplarily, 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.

Exemplarily, 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.

In another possible implementation, 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, and 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.

Exemplarily, 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.

Exemplarily, the third precoding information and layer number indication field are used to indicate the second codeword, and the fourth precoding information and layer number indication field are used to indicate an empty matrix.

Among them, 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.

Exemplarily, the third precoding information and the layer number indication field are used to indicate a third codeword, and 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.

Exemplarily, the third precoding information and layer number indication field are used to indicate an empty matrix, and the fourth precoding information and layer number indication field are used to indicate a second codeword.

Among them, 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.

Exemplarily, 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.

In the above embodiment, when the number of antenna ports of the terminal is the first number and the number of port groups is 2, and the number of transmission layers is an odd number greater than 1, 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.

Next, the communication method provided by the present disclosure will be introduced from the terminal side.

The present disclosure provides a communication method, as shown in FIG. 2 , which 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:

In 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.

In the embodiment of the present disclosure, the first number is the number of antenna ports deployed on the terminal, which can be a positive integer, such as 1, 2, 3, ...

In the present disclosure, when the number of port groups is 2, 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.

It should be noted that 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.

In the embodiment of the present disclosure, 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.

In 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.

In one possible implementation, 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.

In another possible implementation, 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.

Specifically, the third precoding information and the layer number indication field indicate the second codeword, and 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.

Specifically, 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. After the terminal determines the third codeword and the fourth codeword respectively, it determines the second codeword including the third codeword and the fourth codeword.

Specifically, 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 terminal determines the second codeword based on the fourth precoding information and the layer number indication field.

In step 203, 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.

In a possible implementation, 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.

In a possible implementation, when the total number of transmission layers is 3, the second codeword is one of the partially coherent codewords of the second layer number with the second number of antenna ports.

In one possible implementation, when the total number of transmission layers is greater than 3, the second codeword 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.

In a possible implementation, 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.

Exemplarily, when the number of antenna ports of the terminal, that is, the first number, is 8, and the number of port groups is 2, the second number is 4.

In a possible implementation manner, the terminal may determine that both the first codeword and the second codeword are determined based on the first codebook.

After determining the first codeword, 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.

Similarly, after determining the second codeword, 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.

Among them, 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.

In a possible implementation manner, 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.

After determining the first codeword, 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.

Similarly, after determining the second codeword, 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 specifically may include: fully coherent codewords under 4 ports; and an empty matrix.

Among them, 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.

In a possible implementation, 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.

In another possible implementation, 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.

It should be noted that if the terminal determines that any codeword is a reserved codeword, the terminal determines that the corresponding codeword is an empty matrix.

In the above embodiment, when the number of antenna ports of the terminal is the first number and the number of port groups is 2, and the number of transmission layers is an odd number greater than 1, 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.

In some optional embodiments, referring to FIG. 3 , FIG. 3 is a flow chart of a communication method according to an embodiment, and the method may include the following steps:

In 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.

The implementation of step 301 is similar to that of step 101 above, and will not be repeated here.

In step 302, 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.

The implementation of step 302 is similar to that of step 102 above, and will not be described again here.

In 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.

The implementation of step 303 is similar to the above step 103 and will not be repeated here.

In step 304, the terminal determines a first codeword and a second codeword indicated by the plurality of precoding information and layer number indication fields.

The implementation of step 304 is similar to that of step 202 above, and will not be described in detail here.

In step 305, 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.

The implementation of step 305 is similar to that of step 203 above, and will not be described in detail here.

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.

In the above embodiment, when the number of antenna ports of the terminal is the first number and the number of port groups is 2, and the number of transmission layers is an odd number greater than 1, 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 above scheme is further illustrated below with examples.

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.

In 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:

Of course, 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 Where _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:

Or the 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:

Of course, the codeword can also be This disclosure is not limited to this.

For the above embodiment, 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 in 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.

At this time, 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, and 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 an empty matrix. 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 layer number indication field indicate the second codeword, and the fourth precoding information and layer number indication field indicate an empty matrix; or, the third precoding information and layer number indication field indicate a third codeword, the fourth precoding information and 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 layer number indication field indicate an empty matrix, and the fourth precoding information and layer number indication field indicate the second codeword.

In the above embodiment, when the number of antenna ports of the terminal is the first number and the number of port groups is 2, and the number of transmission layers is an odd number greater than 1, 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.

Corresponding to the aforementioned application function implementation method embodiment, the present disclosure also provides an application function implementation device embodiment.

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.

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.

For the device embodiments, since they basically correspond to the method embodiments, 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.

Accordingly, the present disclosure also provides a communication device, comprising:

processor;

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. For example, 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.

6 , 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. In addition, the processing component 602 may include one or more modules to facilitate the interaction between the processing component 602 and other components. For example, the processing component 602 may include a multimedia module to facilitate the interaction between the multimedia component 608 and the processing component 602. For another example, 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.

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. In some embodiments, the multimedia component 608 includes a front camera and/or a rear camera. When the electronic device 600 is in an operating mode, such as a shooting mode or a video mode, 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. For example, 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. In some embodiments, 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: a home button, a volume button, a start button, and a lock button.

The sensor assembly 616 includes one or more sensors for providing various aspects of status assessment for the electronic device 600. For example, 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. In some embodiments, 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. In an exemplary embodiment, the communication component 618 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 618 also includes a near field communication (NFC) module to facilitate short-range communication. For example, 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.

In an exemplary embodiment, 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.

In an exemplary embodiment, 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. For example, 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.

Accordingly, the present disclosure also provides a communication device, comprising:

processor;

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.

As shown in FIG7 , FIG7 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. Referring to FIG7 , 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.

Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (23)

1. A method of communication, the method performed by a base station, comprising:

in response to determining that the number of antenna ports of a terminal is a first number and the number of port groups is 2, dividing the total number of transmission layers into a first number of layers and a second number of layers, wherein the difference between the second number of layers and the first number of layers is 1;

determining a first code word corresponding to the first layer number, and determining a second code word corresponding to the second layer number, wherein the energy of a first antenna port group corresponding to the first code word is equal to the energy of a second antenna port group corresponding to the second code word;

and sending Downlink Control Information (DCI) comprising a plurality of precoding information and layer number indication domains to the terminal, wherein the precoding information and layer number indication domains are used for indicating the first codeword and the second codeword.

2. The method of claim 1, wherein the first codeword is one of a full coherence codeword having a second number of the first number of layers for the number of antenna ports.

3. The method of claim 1, wherein the second codeword is one of a second number of the second number of partial coherent codewords for the number of antenna ports when the total number of transmission layers is 3.

4. The method of claim 1, wherein the second codeword comprises, when the total number of transmission layers is greater than 3:

a third codeword, which is one of the full-coherent codewords of a third number of layers, the number of antenna ports being a second number; and

a fourth codeword, which is one of the partially coherent codewords of the fourth number of layers, the number of antenna ports being the second number;

the third layer number is equal to the fourth layer number, or the difference value between the fourth layer number and the third layer number is 1.

5. The method of claim 1, wherein the first codeword and the second codeword are determined based on a first codebook, the first codebook comprising:

the number of the antenna ports is a second number of full-coherent codewords;

the number of the antenna ports is a partial coherent codeword under a second number;

the number of the antenna ports is a combination of a second number of full-coherent codewords and the number of the antenna ports is a second number of partial-coherent codewords;

A null matrix; and

the null matrix and the number of antenna ports are a combination of a second number of partially coherent codewords.

6. The method of claim 1, wherein the first codeword is determined based on a second codebook and the second codeword is determined based on a third codebook;

wherein the second codebook comprises:

the number of the antenna ports is a second number of full-coherent codewords; and

a null matrix;

wherein the third codebook comprises:

the number of antenna ports is a second number of partially coherent codewords;

the number of the antenna ports is a combination of a second number of full-coherent codewords and the number of the antenna ports is a second number of partial-coherent codewords; and

the null matrix and the number of antenna ports are a combination of a second number of partially coherent codewords.

7. The method according to any of claims 1-6, wherein a plurality of the precoding information and layer number indication fields comprises:

a first precoding information and layer number indication field, where the first precoding information and layer number indication field is used to indicate the first codeword;

and the second precoding information and layer number indication field is used for indicating the second codeword.

8. The method according to claim 3 or 4, wherein a plurality of the precoding information and layer number indication fields comprises:

a first precoding information and layer number indication field, where the first precoding information and layer number indication field is used to indicate the first codeword;

a third precoding information and layer number indication field;

and a fourth precoding information and layer number indication field, wherein the third precoding information and layer number indication field and the fourth precoding information and layer number indication field are used for indicating the second codeword.

9. The method of claim 8, wherein the third precoding information and layer number indication field indicates the second codeword and the fourth precoding information and layer number indication field indicates a null matrix; or,

the third precoding information and layer number indication field indicates a third codeword, the fourth precoding information and layer number indication field indicates a fourth codeword, and the second codeword includes the third codeword and the fourth codeword; or,

the third precoding information and layer number indication field indicates a null matrix, and the fourth precoding information and layer number indication field indicates the second codeword.

10. The method of any one of claims 1-6, wherein the first number is a positive integer; and/or the number of the groups of groups,

The second number is half of the first number.

11. A method of communication, the method performed by a terminal, comprising:

receiving Downlink Control Information (DCI) comprising a plurality of precoding information and a layer number indication domain sent by a base station in response to the fact that the number of antenna ports is determined to be a first number and the number of port groups is determined to be 2, and the total transmission layer number is an odd number larger than 1;

determining a plurality of first codewords indicated by the precoding information and the layer number indication field and second codewords;

and determining a first layer number and a first Transmission Precoding Matrix Indicator (TPMI) corresponding to a first antenna port group based on the first code word, and determining a second layer number and a second TPMI corresponding to a second antenna port group based on the second code word, wherein the energy of the first antenna port group is equal to the energy of the second antenna port group.

12. The method of claim 11, wherein the plurality of precoding information and layer number indication fields comprises:

a first precoding information and layer number indication field, where the first precoding information and layer number indication field is used to indicate the first codeword;

and the second precoding information and layer number indication field is used for indicating the second codeword.

13. The method of claim 11, wherein the plurality of precoding information and layer number indication fields comprises:

a first precoding information and layer number indication field, where the first precoding information and layer number indication field is used to indicate the first codeword;

a third precoding information and layer number indication field;

and a fourth precoding information and layer number indication field, wherein the third precoding information and layer number indication field and the fourth precoding information and layer number indication field are used for indicating the second codeword.

14. The method of claim 13, wherein the third precoding information and layer number indication field indicates a second codeword and the fourth precoding information and layer number indication field indicates a null matrix; or,

the third precoding information and layer number indication field indicates a third codeword, the fourth precoding information and layer number indication field indicates a fourth codeword, and the second codeword includes the third codeword and the fourth codeword; or,

the third precoding information and layer number indication field indicates a null matrix, and the fourth precoding information and layer number indication field indicates the second codeword.

15. The method according to any of claims 11-14, wherein the first codeword is one of a second number of the first number of layers of full coherence codewords for the number of antenna ports.

16. The method according to any of claims 11-14, wherein the second codeword is one of a second number of partially coherent codewords for a second number of the antenna ports when the total number of transmission layers is 3.

17. The method according to any of claims 11-14, wherein when the total number of transmission layers is greater than 3, the second codeword comprises:

a third codeword, which is one of the full-coherent codewords of a third number of layers, the number of antenna ports being a second number; and

a fourth codeword, which is one of the partially coherent codewords of the fourth number of layers, the number of antenna ports being the second number;

the third layer number is equal to the fourth layer number, or the difference value between the fourth layer number and the third layer number is 1.

18. The method according to any one of claims 11-14, further comprising:

determining the first codeword and the second codeword is determined based on a first codebook, the first codebook comprising:

the number of the antenna ports is a second number of full-coherent codewords;

the number of the antenna ports is a partial coherent codeword under a second number;

The number of the antenna ports is a combination of a second number of full-coherent codewords and the number of the antenna ports is a second number of partial-coherent codewords;

a null matrix; and

the null matrix and the number of antenna ports are a combination of a second number of partially coherent codewords.

19. The method according to any one of claims 11-14, further comprising:

determining the first codeword is determined based on a second codebook, the second codebook comprising:

the number of the antenna ports is a second number of full-coherent codewords; and

a null matrix; the method comprises the steps of,

determining the second codeword is determined based on a third codebook, the third codebook comprising:

the number of antenna ports is a second number of partially coherent codewords;

the number of the antenna ports is a combination of a second number of full-coherent codewords and the number of the antenna ports is a second number of partial-coherent codewords; and

the null matrix and the number of antenna ports are a combination of a second number of partially coherent codewords.

20. The method of any one of claims 11-14, wherein the first number is a positive integer; and/or the number of the groups of groups,

the second number is half of the first number.

21. A communication device, the device being applied to a base station, comprising:

A dividing module configured to divide a total transmission layer number into a first layer number and a second layer number in response to determining that the number of antenna ports of a terminal is a first number and the number of port groups is 2, the total transmission layer number is an odd number greater than 1, and a difference value between the second layer number and the first layer number is 1;

a first determining module configured to determine a first codeword corresponding to the first layer number, and determine a second codeword corresponding to the second layer number, where the energy of a first antenna port group corresponding to the first codeword is equal to the energy of a second antenna port group corresponding to the second codeword;

a sending module, configured to send downlink control information DCI including a plurality of precoding information and a layer number indication field to the terminal, where the plurality of precoding information and the layer number indication field are used to indicate the first codeword and the second codeword.

22. A communication device, the device being applied to a terminal, comprising:

a receiving module configured to receive downlink control information DCI including a plurality of precoding information and a layer number indication field, which is 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 determining module configured to determine a plurality of first codewords and second codewords indicated by the precoding information and layer number indication field;

and a third determining module configured to determine a first layer number and a first transmission precoding matrix indicator TPMI corresponding to a first antenna port group based on the first codeword, and determine a second layer number and a second TPMI corresponding to a second antenna port group based on the second codeword, where energy of the first antenna port group is equal to energy of the second antenna port group.

23. A communication device, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the communication method of any of the preceding claims 1-10 or 11-20.