TWI720777B - Method for sending and receiving channel status information, terminal equipment and network equipment - Google Patents

Abstract

The invention discloses a channel state information sending and receiving method, terminal equipment and network equipment, which are used to provide a CSI sending method or receiving method based on a Rel-16 codebook structure. The method for sending channel state information includes: determining a compressed basis vector in a precoding matrix, the compressed basis vector belongs to a set of candidate basis vectors, wherein the compressed basis vector weighted by the coefficients of the precoding matrix is used to construct the Frequency domain characteristics of the precoding matrix; sending the channel status information to the network device, where the channel status information includes basis vector indicator information, and the basis vector indicator information is used to indicate the compressed basis vector.

Description

Method for sending and receiving channel status information, terminal equipment and network equipment

The invention belongs to the field of communication technology, and particularly relates to a method for sending and receiving channel state information, terminal equipment and network equipment.

The Type II (Type II) codebook is defined in the New Radio (NR) system. The Type II codebook in Rel-15 is based on the linear combination of orthogonal beams and supports rank1 and rank2 codebooks. Since the number of codebook coefficients with Rank=2 is about twice the number of codebook coefficients with rank=1, when the value of Rank Indication (RI) is different, the codebook overhead varies greatly, so the terminal equipment When channel state information (CSI) is fed back based on the Type II codebook in Rel-15, the overhead is relatively high.

Since the network device cannot know the value of RI before receiving the CSI fed back by the terminal device, it cannot determine the CSI overhead. In order to prevent network equipment from being unable to correctly decode CSI due to ambiguity in overhead, in Rel-15, for each sub-band, a two-part structure is adopted for reporting Type II CSI. Wherein, the overhead of the first part of CSI is fixed and has nothing to do with the value of RI, and the overhead of the second part of CSI can be determined by the result of decoding of the first part to avoid the problem of ambiguity in overhead. Since the feedback of each sub-band includes both the phase coefficient of the sub-band and the amplitude coefficient of the sub-band, when the number of sub-bands is large, the system of all sub-bands is fed back. The amount of feedback required is relatively large. For this reason, Rel-16 proposes a low-overhead Type II codebook, which is based on the linear combination of orthogonal beams and the sub-band coefficient compression method, that is, the coefficients of each sub-band are compressed, and the compressed coefficients are fed back to Network equipment to reduce overhead.

Currently, there is no corresponding CSI sending or receiving mechanism for the Rel-16 codebook structure.

The embodiment of the present invention provides a channel state information sending and receiving method, terminal equipment and network equipment, which are used to provide a CSI sending method or receiving method based on the Rel-16 codebook structure.

In the first aspect, a method for sending channel status information is provided, including:

Determine a compressed basis vector in a precoding matrix, the compressed basis vector belongs to a set of candidate basis vectors; wherein, the compressed basis vector weighted by the coefficients of the precoding matrix is used to construct the frequency domain characteristics of the precoding matrix;

Sending channel status information to the network device, where the channel status information includes basis vector indication information, and the basis vector indication information is used to indicate the compressed basis vector.

In a second aspect, a method for receiving channel status information is provided, including:

Receive channel state information from the terminal device, where the channel state information includes basis vector indication information, and the basis vector indication information is used for a compressed basis vector in the precoding matrix, and the compressed basis vector belongs to a set of candidate basis vectors. The compressed basis vector weighted by the coefficients of the precoding matrix is used to construct the frequency domain characteristics of the precoding matrix;

According to the compressed basis vector, the channel state information is analyzed.

In a third aspect, a terminal device is provided, including: a memory for storing instructions; a processor for reading instructions in the memory, and performing the following process:

Determining a compressed basis vector in the precoding matrix, the compressed basis vector belongs to a set of candidate basis vectors; wherein the compressed basis vector weighted by the coefficients of the precoding matrix is used to construct the frequency domain characteristics of the precoding matrix;

Sending channel status information to the network device, where the channel status information includes basis vector indication information, and the basis vector indication information is used to indicate the compressed basis vector;

The transceiver is used to send information under the control of the processor.

In a fourth aspect, a network device is provided, including: a memory for storing instructions; a processor for reading the instructions in the memory and performing the following process:

Receive channel state information from the terminal device, where the channel state information includes basis vector indication information, and the basis vector indication information is used for a compressed basis vector in the precoding matrix, and the compressed basis vector belongs to a set of candidate basis vectors; The compressed basis vector weighted by the coefficients of the precoding matrix is used to construct the frequency domain characteristics of the precoding matrix;

Analyze the channel state information according to the compressed base vector;

The transceiver is used to send information under the control of the processor.

In a fifth aspect, a terminal device is provided, including: a determining unit, configured to determine a compressed basis vector in a precoding matrix, the compressed basis vector belongs to a set of candidate basis vectors, wherein the compressed basis vector weighted by the coefficients of the precoding matrix The basis vector is used to construct the frequency domain characteristics of the precoding matrix; the sending unit is used to send the channel status information to the network device, wherein the channel status information includes basis vector indication information, and the basis vector indication information is used to indicate the Compress the basis vector.

In a sixth aspect, a network device is provided, including: a receiving unit for receiving channel status information from a terminal device, wherein the channel status information includes basis vector indicator information, and the basis vector indicator information is used in the precoding matrix The compressed basis vector belongs to a set of candidate basis vectors, wherein the compressed basis vector weighted by the coefficients of the precoding matrix is used to construct the frequency domain characteristics of the precoding matrix; the analysis unit is used for compressing according to the frequency domain characteristics of the precoding matrix. The basis vector is used to analyze the channel status information.

In a seventh aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores computer instructions. When the computer instructions run on a computer, the computer executes any one of the first aspect or the second aspect described above. Methods.

In the embodiment of the present invention, the channel status information sent by the terminal device to the network device includes basis vector indication information to indicate the compression basis vector used by the coefficients of the weighted precoding matrix of the terminal device, so that the network device can be based on the compression basis. The vector, the beam in the precoding matrix, and the coefficients of the precoding matrix determine the precoding matrix used, so as to analyze the received channel state information to determine the channel state reported by the terminal device.

S1011, S101, S102‧‧‧Step

201, 401‧‧‧Memory

202, 402‧‧‧ processor

203, 403‧‧‧Transceiver

301‧‧‧Determining the unit

302‧‧‧Sending unit

501‧‧‧Receiving Unit

502‧‧‧Analysis unit

503‧‧‧Sending unit

FIG. 1 is a schematic flowchart of a method for sending or receiving channel status information according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a structure of a terminal device provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of another structure of a terminal device according to an embodiment of the present invention;

4 is a schematic diagram of a structure of a network device provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of another structure of a network device provided by an embodiment of the present invention.

In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention.

In the communication process, the network equipment needs to collect the CSI of all terminal equipment for precoding and scheduling, so as to minimize the interference between the signals of the terminal equipment. The terminal equipment can divide the bandwidth of the entire system into multiple sub-bands, and feed back the CSI of each sub-band to the network equipment. The network device generates a precoding matrix of the entire system bandwidth according to the CSI sent by the terminal device, and uses the precoding matrix to map the transmission layer to the antenna port. The transmission layer here is called a precoding module, and each transmission layer represents a data flow that is independently transmitted in the spatial domain or the beam domain. The transmission layer mapped by the precoding matrix of the entire system bandwidth includes at least two transmission layers. In the following description of the embodiment of the present invention, two transmission layers are taken as an example. The two transmission layers are respectively the first transmission layer and the second transmission layer. .

In the embodiment of the present invention, the network device is based on the Rel-16 codebook structure, and determines the precoding matrix of each transmission layer according to the orthogonal beams in the precoding matrix, the coefficients of the precoding matrix, and the compression basis vector. The CSI sent by the terminal device to the network device may indicate the compression basis vector so that the network device can determine the precoding matrix. The coefficients of the precoding matrix are the beamforming weights used by the precoding matrix to map each transmission layer.

The CSI sent by the terminal device to the network device includes two parts, the first part of the CSI and the second part of the CSI. As shown in Table 1, the first part of CSI includes RI, channel quality indication information (CQI) corresponding to the first code word (code word), The differential CQI corresponding to the first codeword, the number of zero coefficients of the transmission layer mapped by the precoding matrix, such as the number of zero coefficients of the transmission layer one (such as the number of zero coefficients-1 in Table 1) and the zero of the transmission layer two The number of coefficients (such as the number of zero coefficients-2 in Table 1). The zero coefficient in the embodiment of the present invention refers to a coefficient processed as zero.

As shown in Table 2, the second part of CSI includes rotation factor, beam indicator information, strongest beam indicator-1 (the strongest beam indicator of transmission layer one), broadband amplitude coefficient -1 (broadband amplitude coefficient of transmission layer one), and strongest Beam indicator-2 (the strongest beam indicator of the second transmission layer), wideband amplitude coefficient-2 (the wideband amplitude coefficient of the second transmission layer), the sub-band phase of the even-numbered sub-band, and the sub-band phase of the odd-numbered sub-band. Among them, the sub-band phase of the even-numbered sub-band can also be replaced by the sub-band amplitude coefficient of the even-numbered sub-band, or by the sub-band phase and sub-band amplitude coefficient of the even-numbered sub-band; the sub-band phase of the odd-numbered sub-band can also be replaced by the odd-numbered sub-band. The sub-band amplitude coefficient is replaced, or replaced by the sub-band phase and sub-band amplitude coefficient of the odd-numbered sub-band.

As shown in Table 1 and Table 2, the overhead of the first part of the CSI is fixed and independent of the value of the RI, while the overhead of the second part of the CSI is determined by the decoded result of the first part. by The coefficients in each sub-band include both the sub-band phase coefficient and the sub-band amplitude coefficient. When the number of sub-bands is large, the system overhead required for the terminal device to send the coefficients of all the sub-bands to the network device is huge. Therefore, the low-overhead Type II codebook is defined in the NR system Rel-16. Taking rank1 codebook as an example, for all sub-bands, the rank1 codebook is the formula (1):

為第L個波束，

表示次頻帶壓縮後的係數，供全部次頻帶共用，p _i,j 表示幅度係數，c _i,j 表示相位係數，

是表示壓縮基向量(W _f )的共軛矩陣，包含M個基向量，每個向量的長度為N，N由次頻帶的個數所確定，N可能是部分次頻帶的數量，也可能是全部次頻帶的數量。終端設備可以基於Rel-16中定義的Type II碼本將每個次頻帶的係數進行壓縮，將壓縮後的係數發送給網路設備。但是目前針對Rel-16的碼本結構還未有相應的CSI的發送或接收機制。 In formula (1), W ₁ represents orthogonal combined beams, including 2L beams,

Is the L-th beam,

Represents the coefficients after compression of the sub-bands, which are shared by all sub-bands, p _{i , j} represent amplitude coefficients, c _{i , j} represent phase coefficients,

Is a conjugate matrix representing the compressed basis vector ( W _f ), containing M basis vectors, each vector has a length of N, and N is determined by the number of sub-bands. N may be the number of partial sub-bands, or it may be The number of all sub-bands. The terminal device can compress the coefficients of each sub-band based on the Type II codebook defined in Rel-16, and send the compressed coefficients to the network device. However, there is no corresponding CSI sending or receiving mechanism for the Rel-16 codebook structure.

In view of this, an embodiment of the present invention provides a method for sending CSI. In this method, the channel state information sent by the terminal device to the network device includes basis vector indication information to indicate the coefficients of the weighted precoding matrix of the terminal device. Compress the base vector, so that the network equipment can determine the precoding matrix used by all the sub-bands of the multiple sub-bands divided by the system bandwidth based on the compressed base vector, the orthogonal beams in the pre-coding matrix, and the coefficients of the pre-coding matrix , So as to analyze the received channel status information to determine the channel status reported by the terminal device.

The following describes the technical solutions provided by the embodiments of the present invention with reference to the accompanying drawings.

Referring to FIG. 1, an embodiment of the present invention provides a method for sending channel status information. The flow of the method is described as follows. Since the method for sending channel status information involves the interaction process between the network device and the terminal device, in the following process description, the process performed by the network device and the terminal device will be described together.

S101. The terminal device determines the compression base vector in the precoding matrix.

In the embodiment of the present invention, the terminal device can inform the network device of the compression basis vector of the coefficients of the compressed precoding matrix, and the compressed basis vector weighted by the coefficients of the precoding matrix is used to construct the frequency domain characteristics of the precoding matrix, so that Based on the codebook structure of Rel-16, the network equipment determines the precoding matrix that maps each of the two transmission layers according to the orthogonal beam, the coefficients of the precoding matrix, and the compression base vector, so as to analyze the received channel status information To determine the channel status reported by the terminal device.

The terminal device can determine the compression basis vector used by the coefficients of the weighted precoding matrix before informing the network device to compress the basis vector. The coefficients of the precoding matrix may be beamforming weights used by the precoding matrix to map each transmission layer. The compressed basis vector can be a basis vector selected from a set of candidate basis vectors, and the set of candidate basis vectors can be understood as a set of predefined basis vectors. The candidate basis vector set may include multiple basis vectors corresponding to each sub-band in all the sub-bands divided by the entire system. The compression base vector is composed of base vectors selected from the set of candidate base vectors corresponding to each sub-band, and is used to compress the coefficients of each sub-band in all sub-bands. For example, the compressed basis vector can be expressed as the following matrix:

The matrix includes M rows and N columns as an example, where N can be the number of all sub-bands, and each column corresponds to the compressed base vector of each sub-band, including M base vectors.

In a possible implementation manner, the terminal device may determine the compression base vector according to the configuration from the network device or a pre-defined rule. For example, the terminal device determines the compression base vector based on the configuration information from the network device, and the terminal device can also determine the compression base vector based on preset zero coefficient information. Introduced separately below.

The terminal device determines the compression base vector based on the configuration information from the network device. Then, before the terminal device sends channel status information to the network device, the network device can execute:

Step S1011, the network device may send configuration information to the terminal device. The configuration information may be used to indicate at least one of the number of compressed base vectors, the number of sub-bands corresponding to the channel state information, and the number of beams corresponding to each transmission layer mapped by the precoding matrix. The sub-band corresponding to the channel status information can be understood as the sub-band to be fed back by the terminal device. The terminal equipment determines the compression base vector used by each sub-frequency band according to the configuration information. In the embodiment of the present invention, step S1011 is an optional step, so it is illustrated by a dotted line in FIG. 1.

The network device may not send configuration information to the terminal device. In this case, the terminal device can determine the compression base vector based on the predefined configuration information. For example, the basis vector set corresponding to each sub-frequency band is predefined in advance, and the rules for selecting the compressed basis vector from the basis vector set corresponding to each sub-frequency band are predefined, so that the terminal device can be based on the pre-defined configuration information and each sub-frequency band. Corresponding basis vector set, thereby determining the compression basis vector corresponding to the precoding matrix.

Of course, in a possible implementation manner, the terminal device may also determine the compression basis vector of the precoding matrix according to the configuration information from the network device and the predefined configuration information. In this case, the configuration information can be set according to the predefined configuration information.

After the terminal device determines the compressed basis vector of the precoding matrix, it notifies the network device of the compressed basis vector. Specifically, please continue to refer to FIG. 1, step S102, the terminal device sends channel status information to the network device.

The channel status information sent by the terminal device to the network device may include base vector indication information, and the base vector indication information is used to indicate the compressed base vector corresponding to each sub-band. In the embodiment of the present invention, the implementation manner of the basis vector indication information may include the following two manners:

The first method: the basis vector indicating information is a first bitmap, and a bit in the first bitmap corresponds to a position of a basis vector in the compressed basis vector in the candidate basis vector set.

For example, if the candidate basis vector set contains N basis vectors, the length of the first bit mapping is N. Assuming that the compression base vector of each sub-band includes M base vectors, it can be pre-set to include N bits, M bits of the N bits are 1, and the remaining NM bits are 0, M bits Corresponding to the position of the base vector, the base vector corresponding to the M bits of 1 is selected from the N base vectors, that is, the M base vectors form a sub-band compressed base vector. Wherein, N and M are both integers greater than or equal to 1.

For ease of understanding, it is assumed that a set of candidate basis vectors for a sub-band includes 13 basis vectors, and the basis vector indication information is shown in Table 3.

A bit with a value of 1 indicates that the basis vector is used, and a bit with a value of 0 indicates Shows that this basis vector is not used. Therefore, the compressed basis vector includes the basis vector {0,1,2,5,9,10,12}.

The second way: the basis vector indication information is the index combination of each basis vector included in the compressed basis vector in the candidate basis vector set.

For example, if the candidate basis vector set contains N basis vectors, the length of the bitmap is N. Assuming that the compressed base vector of each sub-band includes M base vectors, the index of M elements can be preset, such as {2,3,5...}, where 2 represents the second base vector of the N base vectors, 3 represents the third basis vector among the N basis vectors, 5 represents the third basis vector among the N basis vectors, and so on.

For ease of understanding, suppose that the candidate base vector set of a sub-band includes 13 base vectors, and the base vector indication information is the index set {2,3,5}, then the compressed base vector of a sub-band includes base vectors {2,3, 5}.

In the embodiment of the present invention, the basis vector indication information can be carried in the first part of the channel status information, can also be carried in the second part of the channel status information, or can be carried in the first part and the second part of the channel status information.

The precoding matrix mapping two transmission layers may use the same basis vector set, such as the first basis vector set, or different basis vector sets, for example, the first transmission layer uses the first basis vector set, and the second transmission layer uses the second basis vector set. Vector set, where the first base vector set and the second base vector set are from the candidate base vector set. Even if the precoding matrix maps two transmission layers using the same basis vector set, for multiple beams corresponding to the same transmission layer, multiple beams may use the same basis vector set. For example, the third basis vector set may also use different basis vectors. Vector set, for example, the transmission layer 1 uses the third basis vector set, and the transmission layer 2 uses the fourth basis vector set. The third basis vector set here comes from the basis vector set used by the transmission layer 1, and the fourth basis vector set The quantity set comes from the basis vector set used by the transport layer 2.

According to the precoding matrix mapping the same or different basis vector sets used by the two transmission layers, and the same or different basis vector sets used by multiple beams, the carrying method of the basis vector indication information in the channel state information may also be different. In a possible implementation manner, the base vector indication information in the channel status information may be carried in the following manners. In the following, the number of sub-bands is N, the beam corresponding to each transmission layer is 2L, and the compressed base vector includes M base vectors as an example.

For ease of understanding, assuming that the Type II codebook with Rank=2 is used, the precoding matrix of the transmission layer 1 can be expressed as:

The precoding matrix of the transmission layer 2 can be expressed as:

In formula (2) and formula (3), W ₁ contains 2L beams, W _{f , 0} and W _{f , and 1} is a compressed basis vector, each of which contains M basis vectors. Then the coefficients of the sub-band corresponding to each transmission layer are 2L*M.

The first case: each transmission in at least two transmission layers mapped by the precoding matrix The 2L beams corresponding to the layer use the same base vector set, and at least two transmissions use the same compressed base vector.

The basis vector indication information can be located in the first part of the channel status information, or can be located in the second part of the channel status information. For example, taking two transport layers as an example, if transport layer one and transport layer two use the same compressed basis vector, that is, W _{f ,0} and W _{f ,1 are the} same, at this time, the basis vector indication information can be located in the channel state The first part of the information is Part one of the CSI, or the basis vector indicator information can also be located in the second part of the channel status information, which is Part two of the CSI.

The second case: the 2L beams corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix use the same set of basis vectors, and different transmission layers in the at least two transmission layers use different compression basis vectors.

The basis vector indication information can be located in the first part of the channel status information, can also be located in the second part of the channel status information, or can be located in the first and second parts of the channel status information. Among them, if the basis vector indicator information is located in the first part of the channel status channel in the first case, then the basis vector indicator information is located in the second part of the channel status information in the second case, or in the first part and the second part of the channel status information. section. If the basis vector indicator information is located in the second part of the channel status channel in the first case, then the basis vector indicator information is located in the first part of the channel status information in the second case, or in the first part and the second part of the channel status information.

Specifically, when the base vector indication information is located in the first part and the second part of the channel status information, the base vector indication information may include the first sub-indication information and the second sub-indication information, and the first sub-indication information is carried in the channel status information. The first part, the second sub-instruction information is carried in The second part of the channel status information.

In a possible implementation manner, the first sub-indication information is used to indicate the compression basis vectors corresponding to some of the at least two transmission layers, and the second sub-indication information is used to indicate the compression basis vectors of the at least two transmission layers except for some of the transmission layers. Compressed basis vectors corresponding to the remaining transmission layers.

For example, taking two transmission layers as an example, the first sub-indication information can be used to indicate the compression basis vector used by the first transmission layer, and the second sub-indication information can be used to indicate the compression basis vector used by the second transmission layer. Taking three transport layers as an example, the first sub-indication information can be used to indicate the two transport layers, such as the compressed basis vectors used by transport layer one and transport layer two, and the second sub-indication information can be used to indicate transport layer three. The compression base vector used, or, the first sub-indication information can be used to indicate a transport layer, for example, the compression base vector used by the transport layer 1, and the second sub-indication information can be used to indicate the compression used by the transport layer 2 and the transport layer 3. Basis vector.

In a possible implementation manner, the first sub-indication information is used to indicate a set of basis vectors used by at least two transmission layers, and the second sub-indication information is used to indicate a set of basis vectors used by each of the at least two transmission layers.

Among them, taking two transmission layers as an example, the basis vector set used by the two transmission layers is also called the absolute basis vector set, which represents the basis vector set where the compressed basis vector used by the transmission layer one is located, and the compression used by the transmission layer two The union of the basis vector sets where the basis vectors are located. The basis vector set used by each transmission layer is also called the relative basis vector set. The second sub-indication information can be used to indicate the first relative basis vector set and the second relative basis vector set. The first relative basis vector set is the first relative basis vector set of the transmission layer. The base vector set where the compressed base vector used is located belongs to a subset of the absolute base vector set, and the second relative base vector set is the base vector set where the compressed base vector used by the transmission layer two is located, and belongs to the subset of the absolute base vector set. In order to facilitate understanding, the following specific examples introduce the absolute basic direction The set of quantities and the set of relative basis vectors.

Assuming that the candidate basis vector includes 13 basis vectors, the first part of the basis vector indication information, that is, the length indicated by the absolute basis vector set is 13 bits, as shown in Table 4.

A bit with a value of 1 indicates that the base vector is used, and a bit with a value of 0 indicates that the base vector is not used. Therefore, the absolute basis vector set includes basis vectors {0,1,2,5,9,10,12}.

The relative basis vector set of the transmission layer one indicated by the second sub-indicator information can be used to indicate an index set of length M=4, which represents the position of the basis vector in the relative basis vector set in the absolute basis vector set, for example { 0,1,2,3} represents the basis vector {0,1,2,5} in the absolute basis vector set, forming the first relative basis vector set. Similarly, the second set of relative basis vectors is indicated as an index set of length M=4, for example {1,4,5,6} represents the basis vectors {1,9,10,12} in the absolute basis vector set, Form a second set of relative basis vectors.

In a possible implementation manner, the first sub-indication information is used to indicate the number of basis vectors in the set of basis vectors used by at least two transmission layers, and the second sub-indication information is used to indicate the set of basis vectors used by at least two transmission layers. And the set of basis vectors used by each of the at least two transport layers.

For example, taking two transmission layers as an example, the first sub-indicator information can indicate the number of basis vectors contained in the absolute basis vector set, and the second sub-indicator information can indicate the absolute basis vector set, as well as the first relative basis vector set and the first relative basis vector set. Two relative basis vector sets. For example, the first sub-indicating information indicates 6, and the second sub-indicating information includes an index set {0,2,3,5,8,9} indicating an absolute basis vector set, which Represents the basis vectors 0,2,3,5,8,9 in the candidate basis vector set, that is, the absolute basis vector set is {0,2,3,5,8,9}. The first sub-indication information also includes the index set {0,1,2,3} indicating the first relative basis vector set, which represents the first 4 basis vectors in the absolute basis vector set, namely the basis vector {0,2,3 ,5}, the first sub-indication information also includes an index set {1,2,4,5} indicating the second set of relative basis vectors, which represents the 4 basis vectors in the absolute basis vector set, namely basis vectors {2, 3,8,9}.

In a possible implementation manner, the first sub-indication information is used to indicate the number of basis vectors in the set of basis vectors used by the at least two transmission layers, and the second sub-indication information is used to indicate each of the at least two transmission layers. The set of basis vectors used.

For example, taking two transmission layers as an example, the first sub-indication information can indicate the number of basis vectors included in the absolute basis vector set, and the second sub-indication information can indicate the first relative basis vector set and the second relative basis vector set. For example, the first sub-indication information indicates 6, and the second sub-indication information also includes an index set {0,1,2,3} indicating the first relative basis vector set, which represents the first 4 basis vectors in the absolute basis vector set, The first sub-indication information also includes an index set {1,2,4,5} indicating the second set of relative basis vectors, which represents 4 basis vectors in the set of absolute basis vectors.

In a possible implementation, if the first sub-indication information is used to indicate the number of basis vectors in the set of basis vectors used by at least two transmission layers, the second sub-indication information is used to indicate each transmission in the at least two transmission layers. The basis vector set used by the layer, the basis vector in the basis vector set used by each of the at least two transmission layers is selected from the candidate basis vector set. The basis vectors included in the candidate basis vector set are predefined by the system and determined according to the first sub-indication information.

The candidate basis vector set here can be understood as the above-mentioned absolute basis vector set, but the basis vectors contained in the candidate basis vector set may not be indicated by the second sub-indication information, but a set of basis vectors predefined by the system. At the same time, the system confirms Determine the set of candidate basis vectors.

In the embodiment of the present invention, the first sub-indication information is used to indicate the number of basis vectors in the basis vector set used by at least two transmission layers. There may be the following implementation manners:

個位元，其中，N₃為候選基向量集合包括的基向量的個數。 (1) Occupation of the first sub-instruction information

Bits, where N ₃ is the number of basis vectors included in the candidate basis vector set.

個位元(bits)，來指示至少兩個傳輸層使用的基向量集合中基向量的個數。下文為了便於描述，至少兩個傳輸層使用的基向量集合中基向量的個數用N₃’進行示意。 For example, suppose there are 13 sub-bands in the system, that is, the number of basis vectors included in the candidate basis vector set is also 13, and this number is set to N ₃ , that is, N ₃ =13. The first sub-instruction information is carried in the first part of the CSI, which can be occupied

Bits to indicate the number of basis vectors in the basis vector set used by at least two transport layers. In the following, for ease of description, the number of basis vectors in the basis vector sets used by at least two transmission layers is indicated by N ₃ ′.

Taking the first bit of the 4 bits as the highest bit and the last bit as the lowest bit as an example, if the 4 bits indicate 0110, then N ₃ '=6.

In this case, the second sub-indication information may indicate the base vector sets used by at least two transport layers in a bit-mapped manner. At the same time, the second sub-indication information is also used to indicate the basis vector used by each transport layer. For example, the second sub-indication information includes two parts, one of which is a bitmap, and a bit in the bitmap corresponds to the position of the base vector set used by at least two transmission layers in the candidate base vector set. Specifically, you can refer to the foregoing indication method for absolute basis vectors, which will not be repeated here. The other part is also a bitmap, and a bit in the bitmap corresponds to the position of the base vector used by each transmission layer in the base vector set used by at least two transmission layers. For example, the second sub-indication information may be a bitmap as shown in Table 5.

個位元來指示至少兩個傳輸層使用的基向量集合。其中，N ₃ ^'為至少兩個傳輸層使用的基向量集合中的基向量的個數，N₃為候選基向量集合中的基向量的個數。 Or, the second sub-instruction information can occupy

Bits to indicate the set of basis vectors used by at least two transport layers. Wherein, N ₃ ^′ is the number of basis vectors in the basis vector set used by at least two transmission layers, and N ₃ is the number of basis vectors in the candidate basis vector set.

bits，指示至少兩個傳輸層使用的基向量集合。 For example, the second sub-instruction information occupies

bits, indicating the set of basis vectors used by at least two transport layers.

個位元，其中，M _max為至少兩個傳輸層中各傳輸層使用的基向量的個數的總和，M _min為至少兩個傳輸層中各傳輸層使用的基向量的個數中的最大值。 (2) Occupation of the first sub-instruction information

Bits, where M _max is the sum of the number of basis vectors used by each transmission layer in at least two transmission layers, and M _min is the largest of the number of basis vectors used by each transmission layer in at least two transmission layers value.

，其中，

表示RI分別為i時，系統為終端設備的傳輸層0、傳輸層1、…、傳輸層i配置的壓縮基向量個數M ₀、M ₁、…、M _i 中的最大值。

，其中，

表示RI分別為i時，系統為終端設備的傳輸層0、傳輸層1、…、傳輸層i配置的壓縮基向量個數M ₀、M ₁、…、M _i 之和的最大值。 E.g,

,among them,

Indicates the maximum value of the number of compressed basis vectors M ₀ , M ₁ , ..., M _i configured by the system for the transmission layer 0, the transmission layer 1,..., and the transmission layer i of the terminal device when the RI is respectively i.

,among them,

When RI represents respectively i, the terminal device system Transport Layer _0, 1, ..., M 0 the number of basis vectors compressed transport layer arranged i, M _1, ..., M _i, and the maximum value of the transport layer.

Assuming that there are 13 sub-frequency bands in the system, the base station uses high-level signaling to configure the terminal equipment with different values of RI according to Table 6. The number of compressed base vectors of each transmission layer is M.

，N₃’的最大值

。在本發明實施例中，第一指示資訊可以通過

個bits指示N₃’的取值，例如，以3個bits的第一個位元為最高位，最後一個位元為最低位為例，如果3個bits指示為010，則N₃’=7+2=9。相較於第(1)種實現方式，第(2)種實現方式中的第一指示資訊所佔用的位元數節省了1bit，從而節約了信令的開銷。 It can be seen from Table 6 that the minimum value of _{N 3 '}

, The maximum value of _{N 3 '}

. In the embodiment of the present invention, the first instruction information can be passed

Bits indicate _{the value of N 3} ', for example, take the first bit of 3 bits as the highest bit and the last bit as the lowest bit as an example. If 3 bits indicate 010, then N ₃ '=7 +2=9. Compared with the implementation manner (1), the number of bits occupied by the first indication information in the implementation manner (2) saves 1 bit, thereby saving signaling overhead.

Further, the second sub-indication information is also used to indicate the basis vector used by each transport layer.

個位元，M _i為每個傳輸層使用的基向量的個數。 In a possible implementation, the second sub-indication information occupies

Bits, M _i is the number of basis vectors used by each transmission layer.

bits指示傳輸層1使用的基向量集合。第二子指示資訊佔用

bits指示傳輸層2使用的基向量集合。第二子指示 資訊佔用

bits指示傳輸層3使用的基向量集合。 For example, the second sub-instruction information occupies

bits indicate the set of basis vectors used by the transport layer 1. Second sub-instruction information occupancy

bits indicate the base vector set used by the transport layer 2. Second sub-instruction information occupancy

bits indicate the set of basis vectors used by the transport layer 3.

In a possible implementation manner, the second sub-indication information is a bitmap, One bit in the bitmap corresponds to the position of the base vector used by each transmission layer in the base vector set used by at least two transmission layers.

For example, if RI=3, the second sub-indication information indicates the base vectors used by transport layer 0, transport layer 1, and transport layer 2 through the following three bitmaps. The basis vector indications adopted by transport layer 0, transport layer 1, and transport layer 2 are shown in Table 7, Table 8, and Table 9, respectively.

For another example, the base station uses high-level signaling to configure the number of compressed base vectors of each transmission layer to take a value of M when the RI is configured to take different values as shown in Table 10.

，最大值

，則第一子指示資訊可通過

bits指示N₃’的取值。例如，以3個bits的第一個位元為最高位，最後一個位元為最低位為例，如果3個bits指示為011，則N₃’=2+3=5。 Minimum N ₃ 'of the

, Maximum

, Then the first sub-instruction information can be passed

bits indicate the value of _{N 3'.} For example, taking the first bit of 3 bits as the highest bit and the last bit as the lowest bit as an example, if the 3 bits indicate 011, then N ₃ '=2+3=5.

個位元，來指示各個傳輸層採用的基向量，這裡不再贅述。 Similarly, in this case, the second sub-indication information can occupy

One bit is used to indicate the basis vector adopted by each transmission layer, which will not be repeated here.

For another example, the base station uses high-level signaling to configure the number of compressed basis vectors of each transmission layer to take a value of M when the RI is configured to take different values as shown in Table 11.

，最大值

，則第一子指示資訊可通過

bits指示N₃’的取值。例如，以3個bits 的第一個位元為最高位，最後一個位元為最低位為例，如果3個bits指示為011，則N₃’=7+3=10。 Minimum N ₃ 'of the

, Maximum

, Then the first sub-instruction information can be passed

bits indicate the value of _{N 3'.} For example, taking the first bit of 3 bits as the highest bit and the last bit as the lowest bit as an example, if the 3 bits indicate 011, then N ₃ '=7+3=10.

個位元，來指示各個傳輸層採用的基向量，這裡不再贅述。 Similarly, in this case, the second sub-indication information can occupy

One bit is used to indicate the basis vector adopted by each transmission layer, which will not be repeated here.

1，那麼第一子指示資訊佔用

個位元來指示至少兩個傳輸層使用的基向量集合中基向量的個數。 (3) In the embodiment of the present invention, if the system is predefined or the network equipment is configured with at least two transmission layers, each of the transmission layers uses M _def basis vectors, where M _def

1. Then the first sub-instruction information is occupied

Bits to indicate the number of basis vectors in the basis vector set used by at least two transport layers.

For example, assuming that there are 13 sub-bands in the system, that is, the number of basis vectors included in the candidate basis vector set is also 13, the base station sends the terminal equipment through high-level signaling to the terminal equipment when the RI is configured with different values as shown in Table 12. The number of compressed basis vectors is M.

，N₃’的最大值

。如果系 統預定義或配置各傳輸層均採用固定M _def =2個壓縮基向量，例如，候選壓縮基向量中的第1個和第2個壓縮基向量，則第一指示資訊可以通過

個bits指示N₃’的取值，例如，以2個bits的第一個位元為最高位，最後一個位元為最低位為例，如果2個bits指示為11，則N₃’=7+3+2=11。相較於第(1)種實現方式，第(3)種實現方式中的第一指示資訊所佔用的位元數節省了2bit，從而節約了信令的開銷。 It can be seen from Table 12 that the minimum value of _{N 3 '}

, The maximum value of _{N 3 '}

. If the system pre-defines or configures each transmission layer to use fixed M _def = 2 compressed basis vectors, for example, the first and second compressed basis vectors in the candidate compressed basis vectors, the first indication information can be passed

Bits indicate _{the value of N 3} '. For example, take the first bit of 2 bits as the highest bit and the last bit as the lowest bit as an example. If 2 bits indicate 11, then N ₃ '=7 +3+2=11. Compared with the implementation manner (1), the number of bits occupied by the first indication information in the implementation manner (3) saves 2 bits, thereby saving signaling overhead.

個位元，來指示各個傳輸層採用的基向量，這裡不再贅述。 Similarly, in this case, the second sub-indication information can occupy

One bit is used to indicate the basis vector adopted by each transmission layer, which will not be repeated here.

個位元來指示各個傳輸層採用的基向量時，終端設備可以不上報，或者，終端設備採用1個位元指示。 In a possible implementation, if RI=1, if the second sub-indication information passes

When the unit bit is used to indicate the base vector adopted by each transmission layer, the terminal device may not report it, or the terminal device uses 1 bit to indicate.

For example, assuming that there are 13 sub-bands in the system, that is, the number of basis vectors included in the candidate basis vector set is also 13, the base station uses high-level signaling to the terminal equipment according to Table 13 when the RI is configured with different values. The number of compressed basis vectors is M.

When RI=1, according to the system predefinition, the terminal device may not report the base vector used by each transport layer in the second part of the CSI; or, the second sub-indication information uses a bit value (for example, 0) to indicate that the transport layer 0 uses Or the second sub-indication information is indicated by a bitmap as shown in Table 14.

The third case: different beams in at least one beam corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix use different basis vector sets. The basis vector indication information can be located in the first part of the channel status information, or it can be Located in the second part of the channel status information, it can also be located in the first and second parts of the channel status information. In this case, for each transmission layer, the terminal device can send 2L compressed basis vectors to the network device.

In a possible implementation manner, the number of basis vectors in the basis vector sets corresponding to different beams is the same or different, the basis vector indication information is located in the first part or the second part of the channel status information, and the basis vector indication information is bit-mapped. The length of is 2L*N, where 2L is the number of beams, N is the number of candidate basis vector sets, and a preset bit corresponds to the position of a compressed basis vector corresponding to a transmission layer in the candidate basis vector set.

In a possible implementation manner, the number of basis vectors in the basis vector sets corresponding to different beams is the same or different, and the basis vector indication information includes first sub-indication information and second sub-indication information, The first sub-indication information can be carried in the first part of the channel status information, and the second sub-indication information can be carried in the second part of the channel status information. The first sub-indication information can indicate the number K of basis vectors in the absolute basis vector set, and the second sub-indication information is used to indicate the K basis vectors in the absolute basis vector set.

For example, for each transmission layer, the base vector indication information is a bit map, and the length of the bit map is 2L*K, and each bit in it corresponds to a base vector in the absolute base vector set. For example: the number of basis vectors in the candidate basis vector set is N=13, the number of beams L=2, the first sub-indicator information is used to indicate the number of basis vectors in the absolute basis vector set K=5, and the second sub-indicator The information indicating the absolute basis vector set is {0,2,4,5,7}, and the second sub-indicating information uses the bit mapping shown in Table 15 to indicate the first relative basis vector set.

In Table 15, the first row represents the set of basis vectors corresponding to the first beam of the transmission layer 1, that is, the first set of relative basis vectors. The bitmap in the first row is 10111, and the first relative basis vector set corresponding to the absolute basis vector set {0,2,4,5,7} is {0,4,5,7}. Similarly, the second row indicates that the relative basis vector set corresponding to the second beam of the transmission layer one is {2, 7}, and so on.

Similarly, the second sub-indication information uses the bit mapping shown in Table 16 to indicate the second set of relative basis vectors.

In Table 16, the first row represents the basis vector set corresponding to the first beam of the transmission layer 2, that is, the first relative basis vector set. The bitmap in the first row is 11100, and the first relative basis vector set corresponding to the absolute basis vector set {0,2,4,5,7} is {0,2,4}. Similarly, the second row indicates that the second relative basis vector set corresponding to the second beam of the transmission layer two is {2, 4, 7}, and so on.

In a possible implementation manner, the basis vector indication information includes first sub-indication information and second sub-indication information. The first sub-indication information can be carried in the first part of the channel status information, and the second sub-indication information can be carried in the channel status information. The second part. The first sub-indication information may indicate the number of basis vectors in the basis vector sets used by at least two transmission layers, respectively, and the second sub-indication information is used to indicate the basis vector sets corresponding to each beam of each transmission layer.

For example, for each transport layer, the second sub-indicator information includes a base vector set indicator information and a bit map. For example, the number of basis vectors in the candidate basis vector set is N=13, the number of beams L=2, and the first sub-indicator information is used to indicate the number of basis vectors in the basis vector set used by the transmission layer 1 K1=5, The number of basis vectors in the basis vector set used by the transmission layer 2 is K2=3. The second sub-indication information is used to indicate that the base vector set used by the transport layer one is {0,2,4,5,7}, and the base vector set used by the transport layer two is {3,7,10}. The second sub-indication information includes a bitmap of 2L*K1 as shown in Table 17, indicating the base vector set of the transport layer one.

In Table 17, the first row indicates that the base vector set corresponding to the first beam of the transmission layer one is base vector {0,4,5,7}, and the second row indicates that the base vector set corresponding to the second beam of the transmission layer one is The basis vector {2,7}, and so on.

The second sub-indication information also includes a bitmap of 2L*K1 as shown in Table 18, indicating the base vector set of the second transmission layer.

In Table 18, the first row indicates that the basis vector set corresponding to the first beam of the transmission layer 2 is the basis vector {3,7,10}, and the second row indicates that the basis vector set corresponding to the second beam of the transmission layer 2 is the basis vector {7,10}, and so on.

In a possible implementation manner, the basis vector indication information includes first sub-indication information and second sub-indication information. The first sub-indication information can be carried in the first part of the channel status information, and the second sub-indication information can be carried in the channel status information. The second part. The first sub-indication information may be used to indicate the number of basis vector sets corresponding to each beam corresponding to each transmission layer in the at least two transmission layers, and the second sub-indication information may be used to indicate the number of each beam corresponding to each transmission layer. Base vector collection.

For example: the number of basis vectors in the candidate basis vector set is N=13, and the number of beams L=2. The first sub-indication information can indicate the basis vectors corresponding to the 2L=4 beams of the transmission layer 1. The number of basis vectors in the set is {2,4,3,2}, and the number of basis vectors in the set of basis vectors corresponding to the 2L=4 beams of the second transmission layer is {2,2,2, 3}. The second sub-indication information can indicate that the base vector sets corresponding to the four beams of the transmission layer one are {0,1}, {1,3,4,5}, {0,5,7}, {2,8, 11}, and the basis vector sets corresponding to the 4 beams of the transmission layer two are {2,3}, {9,10}, {8,11}, {6,9,11}. Taking the second beam of the transmission layer 2 as an example, the first sub-indicator information indicates that the number of basis vectors in the set of basis vectors corresponding to this beam is 2, and the second sub-indicator information indicates that the set of basis vectors corresponding to the sub-beam is a candidate basis vector The basis vector {9,10} in, the other beams can be deduced by analogy.

In the embodiment of the present invention, the terminal device can send the basis vector indication information to the network device according to any one of the above-mentioned first situation to the third situation, so as to inform the network device to obtain the compressed basis vector of the precoding matrix. For obtaining the coefficients of the precoding matrix, the network device and the terminal device can pre-determine, or the system predefines the coefficients of the precoding matrix. For example, the predefined configuration information can also indicate the coefficients of the precoding matrix. In this case, the terminal The device may not send the coefficients of the precoding matrix to the network device, and it is preset that the network device knows the coefficients of the precoding matrix. For example, the network device and the terminal device have agreed on the coefficients of the precoding matrix in advance.

If the network device cannot know the coefficients of the precoding matrix to be weighted, for example, the system does not have predefined coefficients of the precoding matrix, and the number of coefficients used is less than the first preset value, the first preset value may be, for example The product of the number of at least one beam and the number of basis vectors in the compressed basis vector. Taking 2L beams and compressing base vectors including M base vectors as an example, the first default value is 2L*M, that is, when the number of coefficients used K0 is less than 2L*M, the network equipment may not know what to compress The coefficients of the precoding matrix.

In view of this, in the embodiment of the present invention, the terminal device can also inform the network device of the coefficients of the precoding matrix. For example, the channel status information sent by the terminal device to the network device can also be The zero coefficient indicating information is included to indicate the coefficient used as 0 among all the coefficients corresponding to all the sub-frequency bands. For another example, the channel status information sent by the terminal device to the network device may also include non-zero coefficient indicating information for indicating the coefficients used as non-zero values among all the coefficients corresponding to all the sub-frequency bands.

According to the precoding matrix mapping at least two transmission layers using the same or different basis vector sets, and multiple beams using the same or different basis vector sets, the content included in the zero coefficient indicator information or the non-zero coefficient indicator information It may also be different, as detailed below.

When the 2L beams of each of the two transmission layers mapped by the precoding matrix use the same set of basis vectors, for each transmission layer, the terminal device can send K0<2L*M basis vectors to the network device to form The compressed basis vector of the precoding matrix. In this case, the coefficients and basis vector indication information corresponding to each transmission layer need to be sent to the network equipment. The basis vector indication information can be sent to the network equipment in the same way as the sending methods provided in the first to third cases. For details, please refer to the sending methods provided in the first to third cases mentioned above, which will not be repeated here.

In a possible implementation manner, the coefficients of the precoding matrix may be a coefficient matrix including 2L*M coefficients, and the zero coefficient indication information may be used to indicate the position of the zero coefficient in the coefficient matrix, so as to determine that the coefficient matrix corresponds to the position. The coefficient of is the zero coefficient. Alternatively, the non-zero coefficient indication information can be used to indicate the position of the non-zero coefficient in the coefficient matrix, so as to determine that the coefficient corresponding to the position in the coefficient matrix is a non-zero coefficient. The coefficient matrix can be predefined by the system or sent by the terminal device to the network device. Among them, the zero coefficient indicating information or the non-zero coefficient indicating information can be realized in the following ways.

In a possible implementation, the zero coefficient indication information is used to indicate that the zero coefficient is in the coefficient At least one of the row position and the column position in the matrix. For example, the zero coefficient indicating information is the index of each zero coefficient of each zero coefficient in the preset coefficient matrix, and its size is (2L*M-K0)*log2 (2L*M) bits. Further, the zero coefficient indicating information may be a bit map, and a preset bit in the bit map corresponds to a position of a zero coefficient in a row or a row indicated by the index. For example, the zero coefficient indication information is 2L*M bits, and a bit value of 1 is used to indicate the position of the zero coefficient in the row or column indicated by the index, which is the precision in the preset coefficient matrix. position.

In a possible implementation manner, the system may predefine a set of zero coefficients for beams, which is referred to as a set of zero coefficients for the convenience of description. The system can also predefine a set of zero coefficients for the basis vector, which is called a set of zero coefficient basis vectors for the purpose of description. The set of zero coefficient beams corresponds to the coefficients indicated by the rows in the preset coefficient matrix, and the set of zero coefficient basis vectors corresponds to the coefficients indicated by the columns in the preset coefficient matrix. For example, the following preset coefficient matrix corresponds to 2L beams All the coefficients of are as follows:

The set of zero-coefficient beams is the set of coefficients indicated by the dashed line, and the set of zero-coefficient basis vectors is the set of coefficients indicated by the dashed column. Of course, the zero-coefficient beam set and the zero-coefficient basis vector set may also be sent by the terminal device to the network device, which is not limited in the embodiment of the present invention.

Similarly, the system can predefine a set of non-zero coefficients for beams, which is called a set of non-zero coefficients for the convenience of description. The system can also predefine non-zero coefficients for the basis vector The set is called a set of non-zero coefficient basis vectors for aspect description. The set of non-zero coefficient beams corresponds to the coefficients indicated by the rows in the preset coefficient matrix, and the set of non-zero coefficient basis vectors corresponds to the coefficients indicated by the columns in the preset coefficient matrix. Similar to the zero-coefficient beam set, taking the above-mentioned zero-coefficient beam set as an example, the non-zero coefficient beam set is a set of coefficients other than those indicated by the dashed line, and the set of non-zero coefficient base vectors is a set of coefficients other than the dashed line. Of course, the non-zero coefficient beam set and the non-zero coefficient base vector set may also be sent by the terminal device to the network device, which is not limited in the embodiment of the present invention.

If the system predefines the zero coefficient beam set and zero coefficient basis vector set, the zero coefficient indication information can indicate the position of the zero coefficient in the zero coefficient beam set and the position of the zero coefficient basis vector set, that is, the zero coefficient in the coefficient matrix The row position and column position of the middle. In a possible implementation manner, the zero coefficient indicating information is the index of the zero coefficient in the zero coefficient beam set and the zero coefficient base vector set. For example, the zero coefficient indicator information includes the index {1, M-1} of the zero coefficient in the zero coefficient base vector set, and the index {1} of the zero coefficient in the zero coefficient beam set, then the zero coefficient indicated by the zero coefficient indicator information Is the coefficient in the dashed box in the following formula.

The dotted area indicates the position of the zero coefficient, that is, 4L+M-2 positions. Of course, the zero coefficient indication information can also be a bit map, that is, it includes 4L+M-2 bits, indicating that the coefficient at the corresponding position in the dotted area is a zero coefficient.

Similarly, in a possible implementation manner, the non-zero coefficient indicating information includes the second bit mapping and the third year bit mapping. The second bitmap is used to indicate the set of non-zero coefficient beams and non-zero coefficient A set of zero coefficient basis vectors, which includes 2L+M bits. Among them, M bits are used to indicate the set of non-zero coefficient base vectors, and the corresponding bit of the base vector index {0, 2, 3,..., M-2} is set to 1, and 2L bits are used to indicate the set of non-zero coefficient beams. , The beam index is {0, 2, 3,..., 2L-1} and the corresponding bit is set to 1, then the non-zero coefficient range indicated by the non-zero coefficient indication information is the coefficient outside the dashed box in the following formula.

The third bitmap is further used to indicate at least one of the position of the column in the row indicated by the second bitmap and the position of the row in the column of the non-zero coefficient. For example, the third bit mapping uses 2LM-(4L+M-2) bits to indicate that the coefficient at the corresponding position outside the dotted area is a non-zero coefficient.

In a possible implementation manner, some of the row coefficients in the multiple row coefficients in the coefficient matrix are predefined. For example, the system predefines the set of zero coefficient beams as the zero coefficients corresponding to the last L0 beams according to the relationship of beams from strong to weak. Beam collection. The terminal device may not send this zero-coefficient beam set to the network device. The zero coefficient indication information is used to indicate the zero coefficients in the zero coefficient beam set corresponding to the L0 beams. For example, the zero coefficient indication information can be L0*M bit mapping. For example, assume that the weakest L0=2 beams are beam 1 and The beam 2L-1 is as follows. The zero coefficient indication information may include 2M bits to indicate the position of the zero coefficient, that is, the coefficient included in the dotted line in the following formula.

In a possible implementation manner, the system predefines that the coefficient at the intersection of the zero coefficient beam set and the zero coefficient base vector set is a zero coefficient. For ease of understanding, please refer to the following formula:

和

，

和

為零係數。此時，零係數指示資訊用於指示該零係數所在的零係數波束集合和零係數基向量集合。也就是如上式中，虛線所示意的零係數波束集合，以及零係數基向量集合。 In the above formula, the zero coefficient beam set is the zero coefficient beam set corresponding to beam 1, and the zero coefficient base vector set is the zero coefficient base vector set corresponding to base vector 1 and base vector M-1. The coefficient at the intersection position of the zero-coefficient beam set and the zero-coefficient basis vector set is

with

,

with

The coefficient is zero. At this time, the zero coefficient indication information is used to indicate the zero coefficient beam set and the zero coefficient base vector set where the zero coefficient is located. That is, as in the above formula, the set of zero-coefficient beams and the set of zero-coefficient basis vectors as indicated by the dashed line.

In a possible implementation manner, the system predefines that the coefficient at the intersection of the zero-coefficient beam set and the zero-coefficient basis vector set is zero coefficient, and the system predefines the zero coefficient according to the relationship of the beam from strong to weak, and the last L0 beams correspond to zero coefficients. Beam collection. At this time, the terminal device may not send this zero-coefficient beam set to the network device.

In a possible implementation manner, the system predefines that the coefficient at the intersection of the zero-coefficient beam set and the zero-coefficient basis vector set is zero coefficient, and the system predefines that the last S0 basis vector corresponds to the relationship from strong to weak basis vector The zero-coefficient basis vector set. At this time, the terminal device may not send this zero-coefficient basis vector set to the network device.

In the embodiment of the present invention, in step S102, the channel status information sent by the terminal device to the network device may also carry at least one broadband amplitude coefficient. For ease of description, the at least one broadband amplitude coefficient is hereinafter referred to as a group of broadband amplitude coefficients. A wideband amplitude coefficient in a set of wideband amplitude coefficients corresponds to a compressed basis vector in the codebook.

可以採用多種量化方式，一種可能的量化方式中，

可以表示如公式(4)所示的量化方式： Please continue to refer to the codebook indicated by formula (1), the coefficient matrix in formula (1)

A variety of quantization methods can be used. Among a possible quantization method,

It can be expressed as the quantization method shown in formula (4):

的對角元素構成的集合即

可以稱為碼本的寬頻幅度係數集合，或者可以作為一組寬頻幅度係數，一個壓縮基向量i(i=0,1,…，M-1)對應一組寬頻幅度係數中的一個寬頻幅度係數

。一個壓縮基向量i(i=0,1,…，M-1)也可以對應一組相位係數例如{c _0,i c _1,i …c _M-1,i }。 In formula (4), the matrix

The set of diagonal elements is

It can be called the set of wideband amplitude coefficients of the codebook, or it can be used as a set of wideband amplitude coefficients. A compressed base vector i (i=0,1,...,M-1) corresponds to a wideband amplitude coefficient in a set of wideband amplitude coefficients.

. A compressed basis vector i (i=0,1,..., M-1) can also correspond to a set of phase coefficients such as { c _{0, i} c _{1, i} … c _{M -1, i} }.

In a possible implementation manner, the channel status information sent by the terminal device to the network device may also carry at least one differential amplitude coefficient. For the convenience of description, the at least one differential amplitude coefficient is hereinafter referred to as a set of differential amplitude coefficients. A differential amplitude in the coefficient The degree coefficient corresponds to the differential coefficient of a wideband amplitude coefficient in the above-mentioned set of wideband amplitude coefficients.

，其中的一個差分幅度係數

對應一個寬頻幅度係數

的差分係數。 Please continue to refer to formula (4), where a set of differential amplitude coefficients can be

, One of the differential amplitude coefficients

Corresponding to a wideband amplitude coefficient

The difference coefficient.

In summary, in the embodiment of the present invention, the channel status information sent by the terminal device to the network device includes basis vector indication information to indicate the compression basis vector used by the terminal device to compress the coefficients of the precoding matrix, so that the network device can be based on The compression base vector, the orthogonal beams in the precoding matrix, and the coefficients of the precoding matrix determine the precoding matrix used in all sub-bands, so as to analyze the received channel status information to determine the channel status reported by the terminal device.

The following describes the equipment provided by the embodiments of the present invention in conjunction with the accompanying drawings of the specification.

Referring to FIG. 2, based on the same inventive concept, an embodiment of the present invention also provides a terminal device. The terminal device includes a memory 201, a processor 202, and a transceiver 203. The memory 201 and the transceiver 203 can be connected to the processor 202 through a bus interface (Figure 2 takes this as an example), or can also be connected to the processor 202 through a dedicated connection line. The transceiver 203 is used to send information under the control of the processor 202. Among them, the memory 201 can be used to store programs. The processor 202 can be used to read programs in the memory 201 and perform the following processes:

Determine the compressed basis vector in the precoding matrix, the compressed basis vector belongs to the candidate basis vector set, wherein the compressed basis vector weighted by the coefficients of the precoding matrix is used to construct the frequency domain characteristics of the precoding matrix;

Send channel status information to the network device, where the channel status information includes basis vector indication information, and the basis vector indication information is used to indicate the compressed basis vector.

Optionally, the processor 202 is specifically configured to: according to network equipment or predefined The configuration information of determines the compression base vector in the precoding matrix; wherein the configuration information is used to indicate at least one of the following information: the number of compression base vectors, and the number of sub-bands corresponding to the channel status information. The number of beams corresponding to each transmission layer mapped by the precoding matrix.

Optionally, the basis vector indicating information is the first bit map, and a bit in the first bit map corresponds to the position of a basis vector in the compressed basis vector in the candidate basis vector set; or, the basis vector indicating information The index of each basis vector included for the compressed basis vector in the candidate basis vector set.

Optionally, the basis vector indication information is located in at least one of the first part and the second part of the channel state information.

Optionally, if at least one beam corresponding to each of the at least two transmission layers mapped by the precoding matrix uses the same set of basis vectors, and at least two transmissions use the same compressed basis vector, the basis vector indicates that the information is in the channel state The first part of the information; or, if at least one beam corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix uses the same basis vector set, and different transmission layers in the at least two transmission layers use different compression basis Vector, the base vector indicating information is located in the second part of the channel state information, or the base vector indicating information is located in the first part and the second part of the channel state information; if each of the at least two transmission layers mapped by the precoding matrix Different beams in the corresponding at least one beam use different basis vector sets, and the basis vector indication information is located in at least one of the first part and the second part of the channel state information.

Optionally, if at least one beam corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix uses the same set of basis vectors, and different transmission layers in at least two transmissions use different compression basis vectors, then the basis Vector instruction information includes the first sub-instruction information and the second Sub-instruction information, the first sub-instruction information is carried in the first part, and the second sub-instruction information is carried in the second part, where:

The first sub-indication information is used to indicate the compression basis vectors corresponding to some of the at least two transmission layers, and the second sub-indication information is used to indicate the compression corresponding to the remaining transmission layers except for the part of the at least two transmission layers. Basis vector; or, the first sub-indication information is used to indicate the set of basis vectors used by at least two transmission layers, and the second sub-indication information is used to indicate the set of basis vectors used by each of the at least two transmission layers; or , The first sub-indicator information is used to indicate the number of basis vectors in the set of basis vectors used by at least two transmission layers, the second sub-indicator information is used to indicate the set of basis vectors used by at least two transmission layers, and at least two transmission layers The set of basis vectors used by each transmission layer in the layer; or, the first sub-indication information is used to indicate the number of basis vectors in the set of basis vectors used by at least two transmission layers, and the second sub-indication information is used to indicate at least two The set of basis vectors used by each of the two transport layers.

Optionally, if the first sub-indication information is used to indicate the number of basis vectors in the set of basis vectors used by the at least two transmission layers, the second sub-indication information is used to indicate each of the at least two transmission layers. Set of basis vectors used by each transmission layer, the basis vectors in the basis vector set used by each of the at least two transmission layers are selected from the candidate basis vector set, and the basis vectors contained in the candidate basis vector set It is predefined by the system and determined according to the first sub-instruction information.

Optionally, if the first sub-indication information is used to indicate the number of basis vectors in the basis vector set used by the at least two transmission layers, then:

個位元，其中，N₃為該候選基向量集合中的基向量的個數；或者，該第一子指示資訊佔用

個位 元，其中，M _max為該至少兩個傳輸層中各傳輸層使用的基向量的個數的總和，M _min為該至少兩個傳輸層中各傳輸層使用的基向量的個數中的最大值。 The first sub-instruction information occupies

Bits, where N _{3 is} the number of basis vectors in the candidate basis vector set; or, the first sub-indicating information occupies

Bits, where M _max is the sum of the number of basis vectors used by each transmission layer in the at least two transmission layers, and M _{min is} the number of basis vectors used by each transmission layer in the at least two transmission layers The maximum value.

1，則該第一子指示資訊佔用

個位元。 Optionally, if the system pre-defined or the network equipment configures each of the at least two transmission layers to use M _def basis vectors, the M _def

1, the first sub-instruction information occupies

Bits.

個位元，該一個位元映射中的一個位元與該至少兩個傳輸層使用的基向量集合在該候選基向量集合中的位置對應，N ₃ ^'為該至少兩個傳輸層使用的基向量集合中的基向量的個數；該第四部分用於指示每個傳輸層使用的基向量，該第二子指示資訊還為另一個位元映射，或者該第四部分佔用

個位元，該另一個位元映射中的一個位元與每一個傳輸層使用的基向量在該至少兩個傳輸層使用的基向量集合中的位置對應，M _i為每個傳輸層使用的基向量的個數。 Optionally, the second sub-indication information includes a third part and a fourth part; wherein: the third part is used to indicate a set of basis vectors used by the at least two transport layers, and the third part is a bit map, Or the third part is occupied

Bits, one bit in the one bit map corresponds to the position of the basis vector set used by the at least two transmission layers in the candidate basis vector set, and N ₃ ^'is the basis used by the at least two transmission layers The number of basis vectors in the vector set; the fourth part is used to indicate the basis vectors used by each transport layer, the second sub-indication information is also another bit mapping, or the fourth part occupies

Bits, one bit in the other bit map corresponds to the position of the basis vector used by each transmission layer in the set of basis vectors used by the at least two transmission layers, M _i is the position used by each transmission layer The number of basis vectors.

個位元指示每個傳輸層使用的基向量，且傳輸層是一個，則該第四部分採用1個位元指示每個傳輸層使用的基向量，或者系統預定義終端不上報每個傳輸層使用的基向量。 Optional, if the fourth part is occupied

One bit indicates the base vector used by each transport layer, and the transport layer is one, then the fourth part uses 1 bit to indicate the base vector used by each transport layer, or the system predefined terminal does not report each transmission The basis vector used by the layer.

Optionally, if different beams in at least one beam corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix use different basis vector sets, the basis vectors indicate the data The signal is located in the first part or the second part of the channel status information. The base vector indication information is a bit map. The length of the bit map is 2L*N, where 2L is the number of beams and N is the number of candidate base vector sets. A preset bit corresponds to the position of the compressed basis vector corresponding to a transmission layer in the candidate basis vector set.

Optionally, if different beams in at least one beam corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix use different basis vector sets, the basis vector indication information includes the first sub-indication information and the second sub-indication information. Indication information, the first sub-indication information is carried in the first part, and the second sub-indication information is carried in the second part, wherein: the first sub-indication information is used to indicate the number of basis vectors in the basis vector set used by at least two transmission layers K, the second sub-indication information is used to indicate the K basis vectors in the set of basis vectors used by each of the at least two transmission layers in the at least two transmission layers; or, the first sub-indication information is used to indicate at least two The number of basis vector sets used by each transmission layer, and the second sub-indication information is used to indicate the basis vector set corresponding to each beam of each transmission layer in at least two transmission layers; or, the first sub-indication information is used to indicate The number of basis vectors in the basis vector set corresponding to each beam corresponding to each transmission layer in the at least two transmission layers, and the second sub-indication information is used to indicate the number of beams corresponding to each transmission layer in the at least two transmission layers. Base vector collection.

Optionally, the processor 202 is configured to determine the compressed basis vector according to configuration information from the network device, and at least one beam corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix uses the same basis vector Set, and the number of coefficients used by each transmission layer is less than the first preset value, then the channel state information also carries zero coefficient indicating information or non-zero coefficient indicating information; wherein, the zero coefficient indicating information is used to indicate The zero coefficient used by each transmission layer in the at least two transmission layers, where the zero coefficient is used as 0 in the coefficients of the precoding matrix The coefficients used; the non-zero coefficient indication information is used to indicate the non-zero coefficients used by each of the at least two transmission layers, and the non-zero coefficients are coefficients used as non-zero values among the multiple coefficients of the precoding matrix.

Optionally, the first preset value is a product of the number of at least one beam and the number of base vectors in the compressed base vector.

Optionally, the multiple coefficients are a preset coefficient matrix, and the zero coefficient indication information is used to indicate the position of the zero coefficient in the coefficient matrix, or the non-zero coefficient indication information is used to indicate the position of the non-zero coefficient in the coefficient matrix.

Optionally, the zero coefficient indication information includes the index of the zero coefficient in the coefficient matrix, and the index is used to indicate the row position or column position of the zero coefficient in the coefficient matrix; or, the non-zero coefficient indication information includes the second bit mapping and the first bit mapping. Three-bit mapping; where the second bit mapping is used to indicate the row position or column position of all non-zero coefficients in the coefficient matrix, and the third bit mapping is used to indicate that each non-zero coefficient is in the second bit mapping. The column position in the indicated row position or the row position in the column position.

Optionally, the zero coefficient indication information further includes a fourth bit map. One bit in the fourth bit map corresponds to at least one of the position of the row and the row indicated by the index of a zero coefficient. One.

Optionally, the coefficient at the intersection position of the column coefficient and the row coefficient in the coefficient matrix is a zero coefficient, and the zero coefficient indication information is used to indicate the row coefficient and the column coefficient where the zero coefficient is located.

Optionally, the predefined precoding matrix uses part of the row coefficients of the multiple row coefficients in the coefficient matrix, and the zero coefficient indication information is used to indicate the zero coefficients of the part of the row coefficients in the coefficient matrix.

Optionally, the channel status information also carries at least one broadband amplitude coefficient; among them, A wideband amplitude coefficient corresponds to a compressed basis vector in the codebook.

Optionally, the channel status information also carries at least one differential amplitude coefficient; wherein, one differential amplitude coefficient corresponds to a differential coefficient of a broadband amplitude coefficient.

Wherein, in FIG. 2, the busbar architecture may include any number of interconnected busbars and bridges. Specifically, one or more processors represented by the processor 202 and various circuits of the memory represented by the memory 201 are connected together. The busbar architecture can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are all known in the art, and therefore, no further description will be given here. The bus interface provides an interface. The transceiver 203 may be a plurality of elements, including a transmitter and a transceiver, and provide a unit for communicating with various other devices on the transmission medium. The processor 202 is responsible for managing the bus architecture and general processing, and the memory 201 can store data used by the processor 202 when performing operations.

Referring to FIG. 3, based on the same inventive concept, an embodiment of the present invention provides a terminal device. The terminal device includes a determining unit 301 and a sending unit 302. The determining unit is used to determine a compression basis vector in a precoding matrix. The vector belongs to the set of candidate basis vectors; among them, the compressed basis vectors weighted by the coefficients of the precoding matrix are used to construct the frequency domain characteristics of the precoding matrix; the sending unit is used to send channel status information to the network device, where the channel status information Including basis vector indicator information, basis vector indicator information is used to indicate the compressed basis vector.

Optionally, the determining unit 301 is specifically configured to: determine the compression basis vector in the precoding matrix according to the configuration information from the network device or predefined; wherein, the configuration information is used to indicate at least one of the following information: the The number of compressed base vectors, the number of sub-bands corresponding to the channel state information, and the number of beams corresponding to each transmission layer mapped by the precoding matrix.

Optionally, the basis vector indicating information is the first bit map, and a bit in the first bit map corresponds to the position of a basis vector in the compressed basis vector in the candidate basis vector set; or, the basis vector indicating information The index of each basis vector included for the compressed basis vector in the candidate basis vector set.

Optionally, the basis vector indication information is located in at least one of the first part and the second part of the channel state information.

Optionally, if at least one beam corresponding to each of the at least two transmission layers mapped by the precoding matrix uses the same set of basis vectors, and at least two transmissions use the same compressed basis vector, the basis vector indicates that the information is in the channel state The first part of the information; or, if at least one beam corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix uses the same basis vector set, and different transmission layers in the at least two transmission layers use different compression basis Vector, the base vector indicating information is located in the second part of the channel state information, or the base vector indicating information is located in the first part and the second part of the channel state information; if each of the at least two transmission layers mapped by the precoding matrix Different beams in the corresponding at least one beam use different basis vector sets, and the basis vector indication information is located in at least one of the first part and the second part of the channel state information.

Optionally, if at least one beam corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix uses the same set of basis vectors, and different transmission layers in at least two transmissions use different compression basis vectors, then the basis The vector instruction information includes first sub instruction information and second sub instruction information. The first sub instruction information is carried in the first part, and the second sub instruction information is carried in the second part. The first sub instruction information is used to indicate at least two The compressed basis vector corresponding to part of the transmission layer in the transmission layer, and the second sub-indication information is used to indicate the division part of at least two transmission layers The compressed basis vectors corresponding to the remaining transmission layers of the transmission layer; or, the first sub-indication information is used to indicate the set of basis vectors used by at least two transmission layers, and the second sub-indication information is used to indicate each of the at least two transmission layers The base vector set used by the transport layer; or, the first sub-indication information is used to indicate the number of base vectors in the base vector set used by the at least two transport layers, and the second sub-indication information is used to indicate the number of base vectors used by the at least two transport layers. The basis vector set, and the basis vector set used by each of the at least two transmission layers; or, the first sub-indicator information is used to indicate the number of basis vectors in the basis vector set used by the at least two transmission layers. The two sub-indication information is used to indicate the set of basis vectors used by each of the at least two transmission layers.

Optionally, if the first sub-indication information is used to indicate the number of basis vectors in the set of basis vectors used by the at least two transmission layers, the second sub-indication information is used to indicate each of the at least two transmission layers. Set of basis vectors used by each transmission layer, the basis vectors in the basis vector set used by each of the at least two transmission layers are selected from the candidate basis vector set, and the basis vectors contained in the candidate basis vector set It is predefined by the system and determined according to the first sub-instruction information.

個位元，其中，N₃為該候選基向量集合中的基向量的個數；或者，該第一子指示資訊佔用

個位元，其中，M _max為該至少兩個傳輸層中各傳輸層使用的基向量的個數的總和，M _min為該至少兩個傳輸層中各傳輸層使用的基向量的個數中的最大值。 Optionally, if the first sub-indication information is used to indicate the number of basis vectors in the set of basis vectors used by the at least two transport layers, then: the first sub-indication information occupies

Bits, where N _{3 is} the number of basis vectors in the candidate basis vector set; or, the first sub-indicating information occupies

Bits, where M _max is the sum of the number of basis vectors used by each transmission layer in the at least two transmission layers, and M _{min is} the number of basis vectors used by each transmission layer in the at least two transmission layers The maximum value.

1，則該第一子指示資訊佔用

個位元。 Optionally, if the system pre-defined or the network equipment configures each of the at least two transmission layers to use M _def basis vectors, the M _def

1, the first sub-instruction information occupies

Bits.

個位元，該一個位元映射中的一個位元與該至少兩個傳輸層使用的基向量集合在該候選基向量集合中的位置對應，N ₃ ^'為該至少兩個傳輸層使用的基向量集合中的基向量的個數；該第四部分用於指示每個傳輸層使用的基向量，該第二子指示資訊還為另 一個位元映射，或者該第四部分佔用

個位元，該另一個位元映射中的一個位元與每一個傳輸層使用的基向量在該至少兩個傳輸層使用的基向量集合中的位置對應，M _i為每個傳輸層使用的基向量的個數。 Optionally, the second sub-indication information includes a third part and a fourth part; wherein: the third part is used to indicate a set of basis vectors used by the at least two transport layers, and the third part is a bit map, Or the third part is occupied

Bits, one bit in the one bit map corresponds to the position of the basis vector set used by the at least two transmission layers in the candidate basis vector set, and N ₃ ^'is the basis used by the at least two transmission layers The number of basis vectors in the vector set; the fourth part is used to indicate the basis vectors used by each transport layer, the second sub-indication information is also another bit mapping, or the fourth part occupies

Bits, one bit in the other bit map corresponds to the position of the basis vector used by each transmission layer in the set of basis vectors used by the at least two transmission layers, M _i is the position used by each transmission layer The number of basis vectors.

個位元指示每個傳輸層使用的基向量，且傳輸層是一個，則該第四部分採用1個位元指示每個傳輸層使用的基向量，或者系統預定義終端不上報每個傳輸層使用的基向量。 Optional, if the fourth part is occupied

One bit indicates the base vector used by each transport layer, and the transport layer is one, then the fourth part uses 1 bit to indicate the base vector used by each transport layer, or the system predefined terminal does not report each transmission The basis vector used by the layer.

Optionally, if different beams in at least one beam corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix use different basis vector sets, the basis vector indication information is located in the first part or the second part of the channel state information. In the part, the basis vector indication information is a bit map, and the length of the bit map is 2L*N, where 2L is the number of beams, N is the number of candidate basis vector sets, and a preset bit corresponds to a transmission layer The compressed basis vector corresponds to the position of the candidate basis vector set.

Optionally, if different beams in at least one beam corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix use different basis vector sets, the basis vector indication information includes the first sub-indication information and the second sub-indication information. Indication information, the first sub-indication information is carried in the first part, and the second sub-indication information is carried in the second part, wherein: the first sub-indication information is used to indicate the number of basis vectors in the basis vector set used by at least two transmission layers K, the second sub-indication information is used to indicate the K basis vectors in the set of basis vectors used by each of the at least two transmission layers in the at least two transmission layers; or, the first sub-indication information is used to indicate at least two The number of basis vector sets used by each transmission layer, and the second sub-indication information is used to indicate the basis vector set corresponding to each beam of each transmission layer in at least two transmission layers; or, the first sub-indication information is used to indicate The number of basis vectors in the basis vector set corresponding to each beam corresponding to each transmission layer in the at least two transmission layers, and the second sub-indication information is used to indicate the number of beams corresponding to each transmission layer in the at least two transmission layers. Base vector collection.

Optionally, the determining unit 301 is specifically configured to determine the compressed basis vector according to the configuration information from the network device, and the at least one beam corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix uses the same basis vector Set, and the number of coefficients used by each transmission layer is less than the first preset value, the channel status information also carries zero coefficient indicator information or non-zero coefficient indicator information; wherein, the zero coefficient indicator information is used to indicate at least two The zero coefficient used by each transmission layer in the transmission layer. The zero coefficient is the coefficient used as 0 in the multiple coefficients of the precoding matrix; the non-zero coefficient indication information is used to indicate the non-zero used by each transmission layer in at least two transmission layers. Coefficients, non-zero coefficients are coefficients used as non-zero values among multiple coefficients of the precoding matrix.

Optionally, the first preset value is a product of the number of at least one beam and the number of base vectors in the compressed base vector.

Optionally, the multiple coefficients are a preset coefficient matrix, and the zero coefficient indication information is used to indicate the position of the zero coefficient in the coefficient matrix, or the non-zero coefficient indication information is used to indicate the position of the non-zero coefficient in the coefficient matrix.

Optionally, the zero coefficient indication information includes the index of the zero coefficient in the coefficient matrix, and the index is used to indicate the row position or column position of the zero coefficient in the coefficient matrix; or, the non-zero coefficient indication information includes the second bit mapping and the first bit mapping. Three-bit mapping; where the second bit mapping is used to indicate the row position or column position of all non-zero coefficients in the coefficient matrix, and the third bit mapping is used to indicate that each non-zero coefficient is in the second bit mapping. The column position in the indicated row position or the row position in the column position.

Optionally, the zero coefficient indication information further includes a fourth bit map. One bit in the fourth bit map corresponds to at least one of the position of the row and the row indicated by the index of a zero coefficient. One.

Optionally, the coefficient at the intersection position of the column coefficient and the row coefficient in the coefficient matrix is a zero coefficient, and the zero coefficient indication information is used to indicate the row coefficient and the column coefficient where the zero coefficient is located.

Optionally, the predefined precoding matrix uses part of the row coefficients of the multiple row coefficients in the coefficient matrix, and the zero coefficient indication information is used to indicate the zero coefficients of the part of the row coefficients in the coefficient matrix.

Optionally, the channel state information also carries at least one wideband amplitude coefficient; wherein, one wideband amplitude coefficient corresponds to a compressed basis vector in the codebook.

Optionally, the channel status information also carries at least one differential amplitude coefficient; wherein, one differential amplitude coefficient corresponds to a differential coefficient of a broadband amplitude coefficient.

The physical devices of the determining unit 301 and the sending unit 302 in the terminal device may correspond to the processor 202 or the transceiver 203 in FIG. 2, and the terminal device may be used to perform the operations shown in FIG. The method provided by the illustrated embodiment, therefore, for the functions that can be implemented by the functional modules of the device, reference may be made to the description of the embodiment shown in FIG. 1, which will not be repeated.

Referring to FIG. 4, based on the same inventive concept, an embodiment of the present invention also provides a network device. The network device includes a memory 401, a processor 402, and a transceiver 403. Among them, the memory 401 and the transceiver 403 can be connected to the processor 402 through a bus interface (Figure 4 takes this as an example), or can also be connected to the processor 402 through a dedicated connection line. The transceiver 403 transmits information under the control of the processor 402.

Among them, the memory 401 can be used to store programs. The processor 402 can be used to read programs in the memory 401 and execute the following processes:

Receive channel state information from the terminal device, where the channel state information includes basis vector indication information, the basis vector indication information is used for compressed basis vectors in the precoding matrix, and the compressed basis vectors belong to the set of candidate basis vectors; wherein, the precoding matrix The compressed basis vector weighted by the coefficients of is used to construct the frequency domain characteristics of the precoding matrix;

According to the compressed base vector, the channel status information is analyzed.

Optionally, the processor 402 is further configured to send configuration information to the terminal device, where the configuration information is used to indicate at least one of the following information: the number of compressed base vectors, and the number of sub-bands corresponding to the channel status information , The precoding matrix maps the number of beams corresponding to each transmission layer.

Optionally, the channel state information also carries zero coefficient indication information or non-zero coefficient indication information; wherein the zero coefficient indication information is used to indicate the zero coefficient used by each of the at least two transmission layers mapped by the precoding matrix, and the zero coefficient It is the coefficient used as 0 among the multiple coefficients of the precoding matrix; the non-zero coefficient indication information is used to indicate that each of the at least two transmission layers uses The non-zero coefficients used are the coefficients used as non-zero values among the multiple coefficients of the precoding matrix.

Optionally, the channel state information also carries at least one wideband amplitude coefficient; wherein, one wideband amplitude coefficient corresponds to a compressed basis vector in the codebook.

Optionally, the channel status information also carries at least one differential amplitude coefficient; wherein, one differential amplitude coefficient corresponds to a differential coefficient of a broadband amplitude coefficient.

Wherein, in FIG. 4, the bus structure may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 402 and various circuits of the memory represented by the memory 401 are connected together. The busbar architecture can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are all known in the art, and therefore, no further description will be given here. The bus interface provides an interface. The transceiver 403 may be a plurality of elements, including a transmitter and a transceiver, and provide a unit for communicating with various other devices on the transmission medium. The processor 402 is responsible for managing the bus architecture and general processing, and the memory 401 can store data used by the processor 402 when performing operations.

Referring to FIG. 5, based on the same inventive concept, an embodiment of the present invention provides a network device. The network device includes a receiving unit 501 and a parsing unit 502. The receiving unit is configured to receive channel status information from a terminal device. The channel state information carries the basis vector indication information, which is used for the compressed basis vector in the precoding matrix. The compressed basis vector belongs to the set of candidate basis vectors. Among them, the compressed basis vector weighted by the coefficients of the precoding matrix is used for Construct the frequency domain characteristics of the precoding matrix; the analysis unit is used to analyze the channel state information according to the compressed base vector.

Optionally, it further includes a sending unit 503, configured to send the configuration to the terminal device Information, where the configuration information is used to indicate at least one of the following information: the number of compressed base vectors, the number of sub-bands corresponding to the channel state information, and the number of beams corresponding to each transmission layer mapped by the precoding matrix.

Optionally, the channel state information also carries zero coefficient indication information or non-zero coefficient indication information, where the zero coefficient indication information is used to indicate the zero coefficients used by each of the at least two transmission layers mapped by the precoding matrix, the zero coefficient It is the coefficient used as 0 in the multiple coefficients of the precoding matrix; the non-zero coefficient indication information is used to indicate the non-zero coefficients used in each transmission layer in at least two transmission layers, and the non-zero coefficients are the multiple coefficients in the precoding matrix. The coefficient used as a non-zero value in the coefficient.

Optionally, the channel state information also carries at least one wideband amplitude coefficient; wherein, one wideband amplitude coefficient corresponds to a compressed basis vector in the codebook.

Optionally, the channel status information also carries at least one differential amplitude coefficient; wherein, one differential amplitude coefficient corresponds to a differential coefficient of a broadband amplitude coefficient.

The physical devices corresponding to the receiving unit, the analyzing unit, and the sending unit in the network device may be the processor 402 or the transceiver 403 in FIG. 4, and the network device may be used to perform the functions provided in the embodiment shown in FIG. Method, therefore, for the functions that can be implemented by the functional modules of the device, reference may be made to the description of the embodiment shown in FIG.

Based on the same inventive concept, embodiments of the present invention provide a computer-readable storage medium that stores computer instructions, and when the computer instructions run on a computer, the computer executes the method shown in FIG. 1.

In the specific implementation process, computer-readable storage media include: Universal Serial Bus flash drive (USB), removable hard disk, read-only memory Memory (Read-Only Memory, ROM), Random Access Memory (Random Access Memory, RAM), magnetic disks or optical disks and other storage media that can store program codes.

The method for sending or receiving the channel status channel provided by the embodiment of the present invention can be applied to a wireless communication system, such as a 5G system. However, applicable communication systems include but are not limited to 5G systems or their evolved systems, and other systems based on orthogonal frequency division multiplexing (OFDM), based on DFT-S-OFDM (DFT-Spread OFDM, DFT extended OFDM) ), Evolved Long Term Evolution (eLTE) systems, and new network equipment systems. In practical applications, the connection between the above-mentioned various devices may be a wireless connection or a wired connection.

It should be noted that the aforementioned communication system may include multiple terminal devices, and the network device may communicate (transmit signaling or data) with multiple terminal devices. The terminal device involved in the embodiment of the present invention may be a device that provides voice and/or data connectivity to a user, a palm-type device with a wireless connection function, or other processing devices connected to a wireless modem. The wireless user equipment can communicate with one or more core networks via the Radio Access Network (RAN). The terminal equipment can be a mobile terminal, such as a mobile phone (or “cellular” phone) and a mobile terminal. The computer, for example, can be a portable, pocket-sized, palm-sized, built-in computer or a mobile device in a vehicle, which exchanges language and/or data with the wireless access network. For example, Personal Communication Service (PCS) phones, wireless phones, session initiation protocol (SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDA) and other equipment . The terminal can also be called system, subscriber unit (Subscriber Unit), subscriber station (Subscriber Station), mobile station (Mobile Station), mobile station (Mobile), remote station (Remote Station), access point (Access Point), Remote Terminal, Access Terminal, User Terminal, User Agent, User Device, and Wireless Device .

The network equipment provided by the embodiment of the present invention may be a base station, or it may be used to convert received air frames and IP packets into each other, and act as a router between the wireless terminal equipment and the rest of the access network. The rest of the network may include Internet Protocol (IP) network equipment. The network device may also be a device that coordinates the management of the attributes of the air interface. For example, the network equipment can be the network equipment in the 5G system, such as the Next Generation Node B (gNB), or the Global System for Mobile Communication (GSM) or code division multiple access. The base station (Base Transceiver Station, BTS) in (Code Division Multiple Access, CDMA), or the base station (NodeB) in Wideband Code Division Multiple Access (WCDMA), or the base station (NodeB) in LTE An evolutional Node B (eNB or e-NodeB) is not limited in the embodiment of the present invention.

In the embodiments of the present invention, it should be understood that the disclosed device and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the unit or unit is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or elements may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.

The functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may also be an independent physical module.

If the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, all or part of the technical solutions of the embodiments of the present invention can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions to enable a computer device, for example, A personal computer, a server, or a network device, etc., or a processor (processor) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage media include: universal serial bus flash drive, removable hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

As mentioned above, the above embodiments are only used to introduce the technical solutions of the present invention in detail, but the descriptions of the above embodiments are only used to help understand the methods of the embodiments of the present invention, and should not be construed as limiting the embodiments of the present invention. Any changes or substitutions that can be easily conceived by those skilled in the art should be covered by the protection scope of the embodiments of the present invention.

S1011, S101, S102‧‧‧Step

Claims (20)

A method for sending channel state information, comprising: determining a compressed basis vector in a precoding matrix, the compressed basis vector belongs to a set of candidate basis vectors; wherein the compressed basis vector weighted by the coefficients of the precoding matrix is used In constructing the frequency domain characteristics of the precoding matrix; sending channel status information to the network device, where the channel status information includes basis vector indication information, the basis vector indicating information is used to indicate the compressed basis vector; determining the precoding matrix The compressed basis vector of includes: determining the compressed basis vector in the precoding matrix according to network equipment or predefined configuration information; wherein, the configuration information is used to indicate at least one of the following information: Number; the number of sub-bands corresponding to the channel status information; the number of beams corresponding to each transmission layer mapped by the precoding matrix; the basis vector indicating information is located in the first part and the second part of the channel status information At least one; if at least one beam corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix uses the same set of basis vectors, and the at least two transmission layers use the same compression basis vector, the basis vector indicates information Is located in the first part of the channel state information; or, if at least one beam corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix uses the same base vector set, different transmissions in the at least two transmission layers If the layers use different compressed basis vectors, the basis vector indicating information is located in the second part of the channel state information, or the basis vector indicating information is located in the first part and the second part of the channel state information; if the precoding matrix is mapped In the at least two transmission layers in the at least one beam corresponding to each transmission layer, different beams use different set of basis vectors, then the basis vector indication information is located in the communication At least one of the first part and the second part of the channel status information. The channel state information sending method according to claim 1, wherein the base vector indicating information is a first bit mapping, and a bit in the first bit mapping and a base vector in the compressed base vector are in the The position in the candidate basis vector set corresponds; or, the basis vector indication information includes the index combination of each basis vector included in the compressed basis vector in the candidate basis vector set. The method for sending channel state information according to claim 1, wherein if at least one beam corresponding to each of the at least two transmission layers mapped by the precoding matrix uses the same set of basis vectors, the at least two transmissions Different transmission layers use different compressed basis vectors, the basis vector indicator information includes first sub indicator information and second sub indicator information, wherein: the first sub indicator information is used to indicate parts of the at least two transmission layers The compressed basis vector corresponding to the transmission layer, the second sub-indication information is used to indicate the compressed basis vector corresponding to the remaining transmission layers except the part of the at least two transmission layers; or, the first sub-indication information Is used to indicate a set of basis vectors used by the at least two transmission layers, and the second sub-indication information is used to indicate a set of basis vectors used by each of the at least two transmission layers; or, the first sub-indication information It is used to indicate the number of basis vectors in the basis vector set used by the at least two transmission layers, the second sub-indication information is used to indicate the basis vector set used by the at least two transmission layers, and the number of basis vectors in the at least two transmission layers. The set of basis vectors used by each transmission layer; or, the first sub-indication information is used to indicate the number of basis vectors in the set of basis vectors used by the at least two transmission layers, and the second sub-indication information is used to indicate the A set of basis vectors used by each of the at least two transport layers. The method for sending channel status information according to claim 3, wherein the first sub-indication information is carried in the first part, and the second sub-indication information is carried in the second part. The method for sending channel status information according to claim 3, wherein if the first sub-indication information is used to indicate the number of basis vectors in the set of basis vectors used by the at least two transport layers, the second sub-indication information is used To indicate the basis vector set used by each of the at least two transmission layers, the basis vector in the basis vector set used by each of the at least two transmission layers is selected from the candidate basis vector set , The basis vectors included in the candidate basis vector set are predefined by the system and determined according to the first sub-indication information. The method for sending channel status information according to claim 3, 4, or 5, wherein, if the first sub-indication information is used to indicate the number of basis vectors in the basis vector set used by the at least two transmission layers, then: The first sub-instruction information occupancy

log ₂ ( N ₃ )

Bits, where N _{3 is} the number of basis vectors in the candidate basis vector set; or, the first sub-indicating information occupies

log ₂ ( M _max - M _min )

Bits, where M _max is the sum of the number of basis vectors used by each transmission layer in the at least two transmission layers, and M _{min is} the number of basis vectors used by each transmission layer in the at least two transmission layers The maximum value. The method for sending channel status information according to claim 6, wherein, if the system pre-defines or the network equipment configures each of the at least two transmission layers to use M _def basis vectors, M _def

1, the first sub-instruction information occupies

log ₂ ( M _max - M _min - M _def )

Bits. The method for sending channel status information according to claim 7, wherein the second sub-indication information includes a third part and a fourth part, wherein: the third part is used to indicate a set of basis vectors used by the at least two transmission layers , The third part is a bitmap, or the third part occupies

Bits, one bit in the one bit map corresponds to the position of the basis vector set used by the at least two transmission layers in the candidate basis vector set, and N ₃ ^'is the basis used by the at least two transmission layers The number of basis vectors in the vector set; the fourth part is used to indicate the basis vectors used by each transport layer, the second sub-indication information is also another bit mapping, or the fourth part occupies

Bits, one bit in the other bit map corresponds to the position of the basis vector used by each transmission layer in the set of basis vectors used by the at least two transmission layers, M _i is the position used by each transmission layer The number of basis vectors. The method for sending channel status information according to claim 8, wherein, if the fourth part is occupied

One bit indicates the base vector used by each transport layer, and the transport layer is one, then the fourth part uses 1 bit to indicate the base vector used by each transport layer, or the system predefined terminal does not report each transmission The basis vector used by the layer. The method for sending channel state information according to claim 1, wherein if different beams in at least one beam corresponding to each of the at least two transmission layers mapped by the precoding matrix use different basis vector sets, then the basis The vector indicator information is located in the first part or the second part of the channel status information. The base vector indicator information is a bitmap. The length of the bitmap is 2L*N, where 2L is the number of beams and N is the candidate basis vector The number of sets, a preset bit corresponds to the position of a compressed basis vector corresponding to a transmission layer in the candidate basis vector set. The method for sending channel state information according to claim 1, wherein if different beams in at least one beam corresponding to each of the at least two transmission layers mapped by the precoding matrix use different basis vector sets, then the basis The vector instruction information includes first sub instruction information and second sub instruction information, the first sub instruction information is carried in the first part, and the second sub instruction information is carried in the second part, wherein: the first sub instruction information is used for In order to indicate the number K of the basis vectors in the basis vector set used by the at least two transmission layers, the second sub-indication information is used to indicate the respective transmission layers used by each of the at least two transmission layers in the at least two transmission layers. The K basis vectors in the basis vector set; or, The first sub-indication information is used to indicate the number of basis vector sets used by the at least two transmission layers, and the second sub-indication information is used to indicate the corresponding beams of each of the at least two transmission layers. Base vector set; or, the first sub-indication information is used to indicate the number of base vectors in the base vector set corresponding to each beam corresponding to each transmission layer in the at least two transmission layers, and the second sub-indication information is used To indicate a set of basis vectors corresponding to each beam of each of the at least two transmission layers. The method for sending channel status information according to claim 1, wherein if the terminal device determines the compression basis vector according to the configuration information from the network device, and each of the at least two transmission layers mapped by the precoding matrix The corresponding at least one beam uses the same set of basis vectors, and the number of coefficients used by each transmission layer is less than the first preset value, then the channel state information also carries zero coefficient indication information or non-zero coefficient indication information; Wherein, the zero coefficient indication information is used to indicate the zero coefficient used by each of the at least two transmission layers, the zero coefficient is a coefficient used as 0 among the coefficients of the precoding matrix; the non-zero coefficient indication information It is used to indicate a non-zero coefficient used by each of the at least two transmission layers, and the non-zero coefficient is a coefficient used as a non-zero value among the coefficients of the precoding matrix. The method for sending channel state information according to claim 12, wherein the first preset value is a product of the number of the at least one beam and the number of basis vectors in the compressed basis vector. The method for sending channel status information according to claim 13, wherein the coefficients are a preset coefficient matrix, and the zero coefficient indicating information is used to indicate the position of the zero coefficient in the coefficient matrix, or the non-zero coefficient The indication information is used to indicate the position of the non-zero coefficient in the coefficient matrix. The channel state information sending method according to claim 14, wherein the zero coefficient indicating information includes an index of the zero coefficient in the coefficient matrix, and the index is used to indicate the row position or column of the zero coefficient in the coefficient matrix Location; or the non-zero coefficient indicating information includes a second bit mapping and a third bit mapping; wherein, the second The bit map is used to indicate the row position or column position of all the non-zero coefficients in the coefficient matrix, and the third bit map is used to indicate the position of each non-zero coefficient in the row position indicated by the second bit map. Column position or row position in column position. A method for receiving channel state information, characterized by comprising: receiving channel state information from a terminal device, wherein the channel state information includes basis vector indicator information, and the basis vector indicator information is used for the compressed basis vector in the precoding matrix , The compressed basis vector belongs to a set of candidate basis vectors, wherein the compressed basis vector weighted by the coefficients of the precoding matrix is used to construct the frequency domain characteristics of the precoding matrix; according to the compressed basis vector, the channel state information Perform analysis; before receiving the channel status information from the terminal device, it further includes: sending configuration information to the terminal device, where the configuration information is used to indicate at least one of the following information: the number of compressed basis vectors; and The number of sub-bands corresponding to the channel status information; the precoding matrix maps the number of beams corresponding to each transmission layer; the basis vector indicating information is located in at least one of the first part and the second part of the channel status information; At least one beam corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix uses the same set of basis vectors, and the at least two transmission layers use the same compressed basis vector, then the basis vector indication information is located in the channel state information Or, if at least one beam corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix uses the same set of basis vectors, different transmission layers in the at least two transmission layers use different compression Basis vector, the basis vector indicating information is located in the second part of the channel status information, or the basis vector indicating information is located in the first part and the second part of the channel status information; If different beams in at least one beam corresponding to each transmission layer in the at least two transmission layers mapped by the precoding matrix use different basis vector sets, the basis vector indication information is located in the first part and the second part of the channel state information At least one of them. The method for receiving channel state information according to claim 16, wherein the channel state information also carries zero coefficient indicator information or non-zero coefficient indicator information; wherein, the zero coefficient indicator information is used to indicate at least the precoding matrix mapping The zero coefficient used by each transmission layer in the two transmission layers, where the zero coefficient is a coefficient used as 0 among the coefficients of the precoding matrix; the non-zero coefficient indication information is used to indicate each transmission in the at least two transmission layers A non-zero coefficient used by the layer, and the non-zero coefficient is a coefficient used as a non-zero value among a plurality of coefficients in the precoding matrix. A terminal device, characterized by comprising: a memory for storing instructions; a processor for reading the instructions in the memory, and executing the channel status information sending as described in any one of request items 1 to 15 method. A network device, characterized by comprising: a memory for storing instructions; a processor for reading the instructions in the memory and executing the channel status information as described in any one of request items 16 or 17 The receiving method. A computer-readable storage medium, characterized in that: the computer-readable storage medium stores computer instructions, and when the computer instructions run on a computer, the computer executes the channel status as described in any one of claim items 1 to 15 Information sending method or receiving method of channel status information described in any one of request items 16 or 17.

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