CN116781120A - PUSCH transmission method, terminal and network side equipment - Google Patents

Abstract

The embodiment of the application discloses a PUSCH transmission method, a terminal and network side equipment, belonging to the technical field of communication, wherein the PUSCH transmission method comprises the following steps: the terminal determines a second precoding matrix according to the two first precoding matrices, wherein the second precoding matrix is used for PUSCH transmission of K ports, and K is a positive integer; and the terminal sends the PUSCH according to the second precoding matrix.

Description

PUSCH transmission method, terminal and network side equipment

Technical Field

The present application belongs to the field of communication technology, and specifically relates to a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) transmission method, terminal and network side equipment.

Background Art

With the development of communication technology, terminals may use antennas with more ports (such as 6-ports or 8-ports, etc.) for uplink transmission. However, the related technology only designs the precoding matrix for 4-port antenna transmission, which is not suitable for terminals using 6-port or 8-port antenna transmission, affecting the communication performance of the terminal.

Summary of the invention

The embodiments of the present application provide a PUSCH transmission method, a terminal, and a network-side device, which can solve the problem that the communication performance of the terminal is affected because the related technology does not support the terminal to use antennas with more ports for transmission.

In a first aspect, a PUSCH transmission method is provided, including: a terminal determines a second precoding matrix according to two first precoding matrices, the second precoding matrix is used for PUSCH transmission of K ports, K is a positive integer; the terminal sends PUSCH according to the second precoding matrix.

In a second aspect, a PUSCH transmission method is provided, including: a network side device sends a DCI, wherein the DCI is used to indicate two first precoding matrices, wherein the two first precoding matrices are used by a terminal to determine a second precoding matrix, and wherein the second precoding matrix is used for PUSCH transmission of K ports, where K is a positive integer.

In a third aspect, a PUSCH transmission device is provided, including: a determination module, used to determine a second precoding matrix based on two first precoding matrices, the second precoding matrix is used for PUSCH transmission of K ports, K is a positive integer; a sending module, used to send PUSCH according to the second precoding matrix.

In a fourth aspect, a PUSCH transmission device is provided, including: a sending module, used to send DCI, wherein the DCI is used to indicate two first precoding matrices, the two first precoding matrices are used by the terminal to determine a second precoding matrix, and the second precoding matrix is used for PUSCH transmission of K ports, where K is a positive integer.

In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the processor is used to determine a second precoding matrix based on two first precoding matrices, the second precoding matrix is used for PUSCH transmission of K ports, K is a positive integer, and the communication interface is used to send PUSCH according to the second precoding matrix.

In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

In the eighth aspect, a network side device is provided, including a processor and a communication interface, wherein the communication interface is used to send DCI, the DCI is used to indicate two first precoding matrices, the two first precoding matrices are used by the terminal to determine a second precoding matrix, and the second precoding matrix is used for PUSCH transmission of K ports, where K is a positive integer.

In a ninth aspect, a PUSCH transmission system is provided, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

In the tenth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

In the eleventh aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

In the twelfth aspect, a computer program/program product is provided, wherein the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

In an embodiment of the present application, the terminal can determine a second precoding matrix based on the two first precoding matrices, and perform K-port PUSCH transmission according to the second precoding matrix. In an embodiment of the present application, two precoding matrices supporting fewer-port PUSCH transmissions can be used to implement multi-port PUSCH transmission, which is beneficial to improving the communication performance of the terminal.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a wireless communication system according to an embodiment of the present application;

FIG2 is a schematic flowchart of a PUSCH transmission method according to an embodiment of the present application;

FIG3 is a schematic flowchart of a PUSCH transmission method according to an embodiment of the present application;

FIG4 is a schematic structural diagram of a PUSCH transmission device according to an embodiment of the present application;

FIG5 is a schematic structural diagram of a PUSCH transmission device according to an embodiment of the present application;

FIG6 is a schematic diagram of the structure of a communication device according to an embodiment of the present application;

FIG7 is a schematic diagram of the structure of a terminal according to an embodiment of the present application;

FIG8 is a schematic diagram of the structure of a network side device according to an embodiment of the present application.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first" and "second" are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and/or" in the specification and claims represents at least one of the connected objects, and the character "/" generally represents that the objects associated with each other are in an "or" relationship.

It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE)/LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the above-mentioned systems and radio technologies as well as other systems and radio technologies. The following description describes a new radio (NR) system for example purposes, and NR terms are used in most of the following descriptions, but these technologies can also be applied to applications other than NR system applications, such as the ^6th Generation (6G) communication system.

FIG1 shows a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network side device 12 . Among them, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), augmented reality (augmentedreality, AR)/virtual reality (virtual reality, VR) equipment, a robot, a wearable device (WearableDevice), a vehicle-mounted equipment (VUE), a pedestrian terminal (PUE), a smart home (home equipment with wireless communication functions, such as refrigerators, televisions, washing machines or furniture, etc.), a game console, a personal computer (personal computer, PC), a teller machine or a self-service machine and other terminal side devices, and the wearable device includes: a smart watch, a smart bracelet, a smart headset, a smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), a smart wristband, a smart clothing, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network device, a radio access network (RAN), a radio access network function or a radio access network unit. The access network device may include a base station, a WLAN access point or a WiFi node, etc. The base station may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home B node, a home evolved B node, a transmitting and receiving point (TRP) or some other suitable term in the field, as long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary, it should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

The following describes in detail the physical uplink shared channel (PUSCH) transmission method provided by the embodiments of the present application through some embodiments and application scenarios in combination with the accompanying drawings.

As shown in FIG. 2 , an embodiment of the present application provides a PUSCH transmission method 200, which can be executed by a terminal. In other words, the method can be executed by software or hardware installed in the terminal. The method includes the following steps.

S202: The terminal determines a second precoding matrix according to two first precoding matrices, where the second precoding matrix is used for PUSCH transmission of K ports, where K is a positive integer.

In this embodiment, the two first precoding matrices may be indicated by a network side device. For example, before S202, the terminal may receive downlink control information (Downlink Control Information, DCI), and the DCI may be used to indicate the two first precoding matrices.

Of the two first precoding matrices, one may be a precoding matrix supporting M-port PUSCH transmission, and the other may be a precoding matrix supporting N-port PUSCH transmission, where M+N=K, and M and N are positive integers. For example, the value of K may be 6 or 8, and when K is 6, the values of M and N may be 2 and 4, respectively; for another example, when K is 8, the values of M and N may both be 4.

The first precoding matrix may be a precoding matrix configured by a network side device for a terminal in the related art. For example, the first precoding matrix may be a precoding matrix supporting 4-port PUSCH transmission, such as

wait.

For another example, the first precoding matrix may be a precoding matrix supporting 2-port PUSCH transmission, such as

wait.

In an example, the second precoding matrix determined by the terminal may be one of the following:

Wherein, _W1 and _W2 are the first precoding matrices, and α are coefficients, which can be phase, amplitude or coefficient matrix, such as [1j] ^T , etc.

It should be noted that, in the above-mentioned second precoding matrix, the "0" in the upper right corner represents: an all-0 matrix with the same number of rows as _W1 and the same number of columns as _W2 ; the "0" in the lower left corner represents: an all-0 matrix with the same number of columns as _W1 and the same number of rows as _W2 . The two all-0 matrices here can be configured or indicated by the network side device, or determined according to _W1 and _W2 .

S204: The terminal sends a PUSCH according to the second precoding matrix.

In this step, the terminal may perform precoding processing on the uplink data according to the second precoding matrix, and then map the precoded uplink data to the PUSCH resources for transmission.

In the PUSCH transmission method provided in the embodiment of the present application, the terminal can determine a second precoding matrix according to the two first precoding matrices, and perform K-port PUSCH transmission according to the second precoding matrix. In the embodiment of the present application, two precoding matrices supporting PUSCH transmission of fewer ports can be used to implement multi-port PUSCH transmission, which is beneficial to improving the communication performance of the terminal.

At the same time, the embodiments of the present application do not need to reconfigure the precoding matrix, and the changes to the existing protocol are relatively small. For example, 8Tx transmission can be achieved without introducing a new 8Tx (transmission) precoding matrix. The terminal implementation is simple and conducive to less resource overhead.

Optionally, before the terminal determines a second precoding matrix according to two first precoding matrices, the method further includes: the terminal receiving configuration information including one or two sounding reference signal (Sounding Reference Signal, SRS) resource sets for codebook transmission.

In the case where the configuration information includes one SRS resource set, the one SRS resource set may include one of the following 1) to 3):

1) At least one SRS of K ports, the SRS of the K ports being used for PUSCH transmission of the K ports. For example, the configuration information configures an SRS resource set for codebook transmission for the terminal, the SRS resource set comprising at least one 8-antenna transmission (Tx) SRS, i.e., an 8-port SRS, for 8Tx PUSCH transmission, i.e., K is 8.

2) at least one SRS of an M-port and at least one SRS of an N-port, M+N=K, M and N are positive integers, and the SRS of the M-port and the SRS of the N-port are used for PUSCH transmission of the K-port. For example, the configuration information configures an SRS resource set for codebook transmission for the terminal, and the SRS resource set includes at least two 4-port SRSs, that is, M and N are both 4, and K is 8.

In this embodiment, the two first precoding matrices may be an M-port precoding matrix and an N-port precoding matrix respectively.

Optionally, the SRS of the M port in the one SRS resource set is associated with the SRS of the N port, and specifically can be associated in at least one of the following ways: a) explicitly configured by the configuration information; b) associated with the same spatial relationship, where the spatial relationship can be a beam, a transmission configuration indicator (TCI) status, a path loss reference signal, etc.; c) predefined, such as agreed upon by the protocol, the protocol can agree on the associated SRS; d) determined according to the SRS resource index size.

3) at least one SRS of a K-port and at least one SRS of an L-port, where L is a positive integer, L is less than K, and the SRS of the K-port is used for PUSCH transmission of the K-port. For example, the configuration information configures an SRS resource set for codebook transmission for the terminal, and the SRS resource set includes 8-port SRS resources and 4-port SRS resources, that is, L is 4 and K is 8.

Optionally, when the terminal is configured with full power transmission mode, the one SRS resource set includes at least one SRS of a K port and at least one SRS of an L port; wherein the SRS of the K port is used for PUSCH transmission of the K port.

In the case where the configuration information includes two SRS resource sets, among the two SRS resource sets, one SRS resource set includes at least one SRS of an M port, and the other SRS resource set includes at least one SRS of an N port, M+N=K, M and N are positive integers, and the SRS of the M port and the SRS of the N port are used for PUSCH transmission of the K port.

Optionally, the power control parameters configured in the two SRS resource sets are the same. This embodiment can ensure that the transmission power of the SRS in the two SRS resource sets is the same as much as possible, so that the network side device can obtain the channel condition according to the received SRS, further calculate the precoding matrix for uplink transmission, and improve communication performance.

For example, the configuration information configures two SRS resource sets for codebook transmission for the terminal, each SRS resource set includes at least one 4-port SRS, and the power control parameters configured by the two SRS resource sets are the same; two SRSs from the two SRS resource sets are used for 8Tx PUSCH transmission, that is, M and N are both 4, and K is 8.

Optionally, based on the above embodiments, before the terminal determines a second precoding matrix according to two first precoding matrices, the method further includes: the terminal receiving DCI, where the DCI is used to indicate the two first precoding matrices.

The DCI may include at least one SRS Resource Indicator (SRI) field, where the SRI field is used to indicate an SRS, and the SRS is used for the PUSCH transmission.

Optionally, when the configuration information received by the terminal configures one SRS resource set for the terminal, the DCI includes one SRI field; when the configuration information received by the terminal includes two SRS resource sets, the DCI includes one SRI field or two SRI fields. Optionally, when the configuration information configures two SRS resource sets for the terminal and the DCI includes one SRI field, the one SRI field simultaneously indicates the SRS in the two SRS resource sets.

Optionally, when the configuration information received by the terminal includes an SRS resource set, and in the one SRS resource set, the SRS of the M port is associated with the SRS of the N port, the bit length of the SRI field is determined by the number of associated SRS groups. The mutually associated SRS (resources) are a group, and the value of the SRI field is mapped to a group of SRS resources. It can be understood that the more the number of associated SRS groups, the larger the bit length of the SRI field.

Optionally, when the SRI domain indicates the SRS of K ports, the PUSCH adopts K port transmission. For example, if the SRI domain indicates the SRS of 8 ports, it means that PUSCH adopts 8Tx transmission. When the SRI domain indicates both the SRS of M ports and the SRS of N ports, the PUSCH adopts K port transmission. For example, if the SRI indicates two associated 4-port SRSs, it means that PUSCH adopts 8Tx transmission, that is, M and N are both 4, and K is 8.

Based on the above embodiments, the DCI received by the terminal may further include two Transmitted Precoding Matrix Indicator (TPMI) fields, where the two TPMI fields are used to indicate the two first precoding matrices, for example, one TPMI field indicates one first precoding matrix.

Optionally, the method further includes: the terminal selecting the two first precoding matrices from two codebook subsets according to the two TPMI domains, the two codebook subsets may be configured by radio resource control (Radio Resource Control, RRC), and the coherence types of the two codebook subsets may also be configured by RRC.

Optionally, the method further includes: the terminal determining the two codebook subsets from a plurality of codebook subsets according to at least one of the following:

1) The number of ports of the precoding matrix included in the codebook subset;

In this embodiment, the number of ports of the precoding matrix included in the two codebook subsets selected by the terminal is determined by one of the following: a) the configuration of the SRS configured for the terminal, such as the number of ports is M and N respectively, and the configuration of the SRS mentioned here can refer to the content of the previous configuration information; b) an agreed value, such as the number of ports of the precoding matrix included in the two codebook subsets pre-agreed by the protocol, such as for an 8-port SRS, the two codebook subsets are 4 ports respectively.

2) The coherence type of the codebook subset;

In this embodiment, the terminal may determine the two codebook subsets according to the (antenna port coherence type) of the PUSCH transmission of the K port. For example, the network side device configures the antenna port coherence type of 8Tx transmission through RRC, and the terminal determines the two codebook subsets according to the antenna port coherence type. Alternatively, the network side configures the coherence type of the codebook subset for 8Tx transmission, and the terminal determines the precoding coherence type of the two codebook subsets according to the coherence type of the codebook subset for 8Tx transmission.

3) Maximum rank information corresponding to the codebook subset.

In this embodiment, the maximum rank information corresponding to the two TPMI domains may be equal to the maximum rank information corresponding to the two codebook subsets.

The coherence types of the two codebook subsets may include at least one of the following: full coherence and full coherence {full-coherent; full-coherent}, partial coherence and partial coherence {partial-coherent; partial-coherent}, incoherence and non-coherence {non-coherent; non-coherent}, partial non-coherence and partial non-coherent {partial-non-coherent; partial-non-coherent}, full partial non-coherence and full partial non-coherent {full-partial-non-coherent; full-partial-non-coherent}.

Optionally, the method further includes: the terminal determines the two codebook subsets according to the antenna port coherence type of the PUSCH transmission of the K port, and the antenna port coherence type can be configured by RRC signaling. For example, the network side device configures the antenna port coherence type of 8Tx transmission through RRC, and the terminal determines the two codebook subsets according to the antenna port coherence type. Alternatively, the network side configures the coherence type of the codebook subset for 8Tx transmission, and the terminal determines the precoding coherence type of the two codebook subsets according to the coherence type of the codebook subset for 8Tx transmission.

Optionally, when the antenna port coherence type is K-port full coherence, the two codebook subsets are full coherence and full coherence. For example, when the antenna port coherence type is 8-port full coherence, the two codebook subsets corresponding to the two TPMIs are full coherence and full coherence {full-coherent; full-coherent}.

Optionally, when the K ports are divided into two groups and the antenna ports in each group are fully coherent, the two codebook subsets are one of the following: all partially non-coherent and all partially non-coherent, full coherence and partial coherence. For example, 8 ports are divided into two groups, each group has 4 antenna ports that are fully coherent (4+4), and the two codebook subsets corresponding to the two TPMIs are at least one of the following: all partially non-coherent and all partially non-coherent {full-partial-non-coherent; full-partial-non-coherent}; full coherence and partial coherence {full-coherent; full-coherent}.

Optionally, when the K ports are divided into two groups and there are two groups of coherent antenna ports in each group, the two codebook subsets are one of the following: partially coherent and partially coherent, partially non-coherent and partially non-coherent. For example, 8 ports are divided into two groups, and 2 antenna ports in each group of 4 antenna ports are a group of coherent ports (2+2+2+2). In this case, the two codebook subsets corresponding to the two TPMIs are at least one of the following: partially coherent and partially coherent {partial-coherent; partial-coherent}; partially non-coherent and partially non-coherent {partial-non-coherent; partial-non-coherent}.

Optionally, when the K ports are divided into two groups, the antenna ports in the first group are fully coherent, a part of the antenna ports in the second group are fully coherent, and the other part of the antenna ports are fully coherent, the two codebook subsets are one of the following: all partially non-coherent and partially non-coherent, and all coherent and partially coherent. For example, 8 ports are divided into two groups, 4 antenna ports in one group of antenna ports are fully coherent, and 2 antenna ports in the other group of antenna ports are a group of coherent ports (4+2+2). In this case, the two codebook subsets corresponding to the two TPMIs are at least one of the following: all partially non-coherent and partially non-coherent {full-partial-non; partially-non-coherent}; all coherent and partially coherent {full-coherent; partial-coherent}.

The fully coherent, partially coherent, and incoherent codebook subsets are precoding matrices whose TPMI indexes satisfy the following Table 1:

Table 1

Optionally, when the DCI received by the terminal includes two TPMI fields, and the terminal selects the two first precoding matrices from two codebook subsets according to the two TPMI fields, the method further includes: the terminal determines the maximum rank information (such as the maximum rank) corresponding to the two codebook subsets according to at least one of the following 1) to 3):

1) RRC signaling configuration; wherein the RRC signaling configuration includes maximum rank information corresponding to the two codebook subsets respectively.

2) The maximum rank corresponding to the first codebook subset is A, and the maximum rank corresponding to the second codebook subset is (R _max -A); wherein A is obtained by rounding up or down half of R _max , and the R _max may be configured by RRC signaling;

3) The maximum rank corresponding to the first codebook subset and the second codebook subset is the minimum of the number of ports indicated by the SRS field and R _max , that is, the maximum rank is min{number of ports indicated by the SRS field, R _max }, and R _max may be configured by RRC signaling.

Optionally, when the DCI received by the terminal includes two TPMI fields, the method further includes: the terminal determining the bit lengths and meanings of the two TPMI fields according to the two codebook subsets, wherein the bit lengths and meanings of the TPMI fields are shown in Table 2 and Table 3.

Table 2TPMI domain interpretation table

Table 3 TPMI domain interpretation table

The above embodiments are described by taking the case where both TPMI domains are valid as an example, and there may be a case where one of the two TPMI domains is invalid. Optionally, when the DCI received by the terminal includes two TPMI domains, the method further includes: the terminal determines the invalid TPMI domain of the two TPMI domains according to at least one of the following:

1) Whether a reserved code point is indicated, for example, the TPMI field indicating a reserved code point is invalid.

2) Whether the codeword is enabled, for example, if the second codeword in the DCI is not enabled, one of the TPMI fields is invalid.

3) Whether the indicated precoding matrix combination exceeds the maximum rank limit. For example, if a precoding matrix combination exceeding the maximum rank limit is indicated, that is, the combination of ranks of the two indicated first precoding matrices exceeds the maximum rank limit, the second TPMI field is invalid.

Optionally, when the DCI received by the terminal includes an SRI field and two TPMI fields, the method further includes: when the SRI field in the DCI indicates that the SRS of the J port is used for PUSCH transmission, and j is less than K, the terminal only interprets the first TPMI field of the two TPMI fields. Of course, the terminal can normally interpret the indication field outside the TPMI field in the DCI; or, the terminal jointly interprets the two TPMI fields; wherein J is a positive integer, and J can be 2 or 4, etc.

For example, in this embodiment, K=8, when the SRI field indicates that 4-port or 2-port SRS resources are used for PUSCH transmission, the terminal only interprets the first TPMI field of the two TPMI fields, or the terminal regards the two TPMI fields as one TPMI field and interprets them jointly.

Optionally, when the DCI received by the terminal includes two TPMI domains, the DCI may also include a first indication domain, wherein the first indication domain is used to indicate one of the following: the first TPMI domain is valid; the second TPMI domain is valid; both TPMI domains are valid; wherein, when the TPMI domain is valid, the terminal interprets the TPMI domain, or the terminal uplink transmission adopts parameters indicated by the valid TPMI domain.

Optionally, when the DCI received by the terminal includes two TPMI fields, the DCI may also include a second indication field, wherein the second indication field is used to indicate coefficients of the two first precoding matrices, and the coefficients are used to calculate the second precoding matrix, and the coefficients may be phases, amplitudes or coefficient matrices, etc.

In one example, the second precoding matrix is one of the following:

Wherein, _W1 and _W2 are the two first precoding matrices, and _W1 and _W2 are respectively associated with different SRSs; and α are coefficients and can be indicated by DCI, such as {[1 0]; [0 1]; [1 1]; [1 j]}.

For example,

Among them, _W1 and _W2 are the first precoding matrix, _W1 and _W2 are indicated by two TPMI fields, and the right side of the equal sign is the second precoding matrix.

It can be seen that the transmission rank of the second precoding matrix is the sum of the ranks of _W1 and _W2 , and the ranks of _W1 and _W2 can meet certain conditions. For example, the terminal does not expect the rank combination of _W1 and _W2 to be: 3+2; 1+4; 4+1; 4+2; 2+4; 4+3.

Optionally, the transmission rank of the second precoding matrix does not exceed a maximum transmission rank, and the maximum transmission rank may be configured by a network-side device.

Optionally, in various embodiments of the present application, the rank of the second precoding matrix is the sum of the ranks of the valid first precoding matrices.

Optionally, in the case where the DCI received by the terminal includes two TPMI domains, the method further includes: in the case where one TPMI domain in the two TPMI domains indicates an invalid code point or an invalid precoding matrix, and the other TPMI domain indicates a valid precoding matrix _W1 , the terminal determines a third precoding matrix for PUSCH transmission according to _W1 , and the third precoding matrix is one of the following:

Optionally, the method further includes: the terminal determines the number of codewords for PUSCH transmission of the K port according to the precoding indication; wherein, when the transmission rank is greater than the first value, the two codewords are enabled, and/or, when two TPMI domains are valid, the two codewords are enabled. Of the two codewords, the first codeword is mapped to P transmission layers, and the second codeword is mapped to Q transmission layers, P is the rank number of _W1 , Q is the rank number of _W2 , _W1 and _W2 are the two first precoding matrices, and/or, P and Q are predefined, P and Q are positive integers, for example, P and Q are agreed upon by the protocol, such as: (P, Q) = (2, 3), (3, 3), (3, 4), (4, 4), etc.

The PUSCH transmission method according to an embodiment of the present application is described in detail above in conjunction with FIG2. The PUSCH transmission method according to another embodiment of the present application will be described in detail below in conjunction with FIG3. It can be understood that the interaction between the network side device and the terminal described from the network side device is the same as or corresponds to the description of the terminal side in the method shown in FIG2. To avoid repetition, the relevant description is appropriately omitted.

Fig. 3 is a schematic diagram of a PUSCH transmission method implementation flow of an embodiment of the present application, which can be applied to a network side device. As shown in Fig. 3, the method 300 includes the following steps.

S302: The network side device sends a DCI, where the DCI is used to indicate two first precoding matrices, where the two first precoding matrices are used by the terminal to determine a second precoding matrix, where the second precoding matrix is used for PUSCH transmission of K ports, where K is a positive integer.

In the PUSCH transmission method provided in the embodiment of the present application, a network side device sends a DCI, wherein the DCI is used to indicate two first precoding matrices, wherein the two first precoding matrices are used by the terminal to determine a second precoding matrix, and the second precoding matrix is used for PUSCH transmission of K ports. In the embodiment of the present application, two precoding matrices that support PUSCH transmission of fewer ports can be used to implement multi-port PUSCH transmission, which is beneficial to improving the communication performance of the terminal.

Optionally, as an embodiment, before the network side device sends the DCI, the method also includes: the network side device sends configuration information, the configuration information including one or two SRS resource sets for codebook transmission; the one SRS resource set includes one of the following: at least one SRS of a K port; at least one SRS of an M port and at least one SRS of an N port; at least one SRS of a K port and at least one SRS of an L port; among the two SRS resource sets, one SRS resource set includes at least one SRS of an M port, and the other SRS resource set includes at least one SRS of an N port; wherein the SRS of the K port is used for PUSCH transmission of the K port; M+N=K, M, N and L are positive integers, L is less than K, and the SRS of the M port and the SRS of the N port are used for PUSCH transmission of the K port.

Optionally, as an embodiment, the DCI includes at least one SRI field, and the SRI field is used to indicate SRS, and the SRS is used for the PUSCH transmission.

Optionally, as an embodiment, the DCI includes two TPMI fields, and the two TPMI fields are used to indicate the two first precoding matrices.

The PUSCH transmission method provided in the embodiment of the present application may be executed by a PUSCH transmission device. In the embodiment of the present application, a PUSCH transmission device executing the PUSCH transmission method is taken as an example to illustrate the PUSCH transmission device provided in the embodiment of the present application.

Fig. 4 is a schematic diagram of the structure of a PUSCH transmission device according to an embodiment of the present application, and the device may correspond to a terminal in other embodiments. As shown in Fig. 4, the device 400 includes the following modules.

The determination module 402 is configured to determine a second precoding matrix according to two first precoding matrices, where the second precoding matrix is used for PUSCH transmission of K ports, where K is a positive integer.

The sending module 404 is configured to send the PUSCH according to the second precoding matrix.

The PUSCH transmission device provided in the embodiment of the present application can determine a second precoding matrix according to the two first precoding matrices, and perform K-port PUSCH transmission according to the second precoding matrix. The embodiment of the present application can use two precoding matrices that support PUSCH transmission of fewer ports to implement multi-port PUSCH transmission, which is beneficial to improving the communication performance of the terminal.

Optionally, as an embodiment, the device also includes a receiving module for receiving configuration information, the configuration information including one or two SRS resource sets for codebook transmission; the one SRS resource set includes one of the following: at least one SRS of a K port; at least one SRS of an M port and at least one SRS of an N port; at least one SRS of a K port and at least one SRS of an L port; among the two SRS resource sets, one SRS resource set includes at least one SRS of an M port, and the other SRS resource set includes at least one SRS of an N port; wherein the SRS of the K port is used for PUSCH transmission of the K port; M+N=K, M, N and L are positive integers, L is less than K, the SRS of the M port and the SRS of the N port are used for PUSCH transmission of the K port.

Optionally, as an embodiment, the SRS of the M port in the SRS resource set is associated with the SRS of the N port in at least one of the following ways: explicitly configured by the configuration information; associated with the same spatial relationship; predefined by protocol agreement; determined according to the index size of the SRS resource.

Optionally, as an embodiment, the power control parameters configured for the two SRS resource sets are the same.

Optionally, as an embodiment, when the terminal is configured with full power transmission mode, the one SRS resource set includes at least one SRS of a K port and at least one SRS of an L port, and the SRS of the K port is used for PUSCH transmission of the K port.

Optionally, as an embodiment, the device further includes a receiving module, configured to receive DCI, wherein the DCI is used to indicate the two first precoding matrices.

Optionally, as an embodiment, the DCI includes at least one SRI field, and the SRI field is used to indicate SRS, and the SRS is used for the PUSCH transmission.

Optionally, as an embodiment, when the configuration information configures one SRS resource set for the device, the DCI includes one SRI domain; when the configuration information configures two SRS resource sets for the device, the DCI includes one SRI domain or two SRI domains.

Optionally, as an embodiment, in the one SRS resource set, the SRS of the M port is associated with the SRS of the N port; wherein the bit length of the SRI field is determined by the number of groups of associated SRSs; wherein the associated SRSs are a group.

Optionally, as an embodiment, when the SRI domain indicates the SRS of the K port, the PUSCH adopts the K port transmission; when the SRI domain simultaneously indicates the SRS of the M port and the SRS of the N port, the PUSCH adopts the K port transmission.

Optionally, as an embodiment, the DCI includes two TPMI fields, and the two TPMI fields are used to indicate the two first precoding matrices.

Optionally, as an embodiment, the apparatus further includes a selection module, configured to select the two first precoding matrices from two codebook subsets according to the two TPMI domains.

Optionally, as an embodiment, the determination module 402 is further used to determine the two codebook subsets from multiple codebook subsets based on at least one of the following: 1) the number of ports of the precoding matrix contained in the codebook subset; 2) the coherence type of the codebook subset; 3) the maximum rank information corresponding to the codebook subset.

Optionally, as an embodiment, the number of ports of the precoding matrix included in the two codebook subsets is determined by one of the following: a configuration of an SRS configured for the device; or an agreed value.

Optionally, as an embodiment, the coherence types of the two codebook subsets include at least one of the following: full coherence and full coherence, partial coherence and partial coherence, incoherence and incoherence, partial incoherence and partial incoherence, all partially incoherent and all partially incoherent.

Optionally, as an embodiment, the coherence type of the two codebook subsets is configured by RRC.

Optionally, as an embodiment, the determination module 402 is further configured to determine the two codebook subsets according to an antenna port coherence type of the PUSCH transmission of the K port.

Optionally, as an embodiment, when the antenna port coherence type is K-port full coherence, the two codebook subsets are full coherence and full coherence; when the K-port is divided into two groups and the antenna ports in each group are fully coherent, the two codebook subsets are one of the following: all partially incoherent and all partially incoherent, full coherence and partial coherence; when the K-port is divided into two groups and there are two groups of coherent antenna ports in each group, the two codebook subsets are one of the following: partial coherence and partial coherence, partial incoherence and partial incoherence; and when the K-port is divided into two groups, the antenna ports in the first group are fully coherent, some antenna ports in the second group are fully coherent, and other some antenna ports are fully coherent, the two codebook subsets are one of the following: all partially incoherent and partially incoherent, full coherence and partial coherence.

Optionally, as an embodiment, the determination module 402 is further used to determine the maximum rank information corresponding to the two codebook subsets according to at least one of the following: RRC signaling configuration; wherein the RRC signaling is configured with the maximum rank information corresponding to the two codebook subsets respectively; the maximum rank corresponding to the first codebook subset is A, and the maximum rank corresponding to the second codebook subset is R _max -A; wherein A is obtained by rounding up or down half of R _max ; the maximum rank corresponding to the first codebook subset and the second codebook subset is the minimum of the number of ports indicated by the SRS domain and R _max ; wherein, R _max is configured by RRC signaling.

Optionally, as an embodiment, the determining module 402 is further configured to determine the bit lengths and meanings of the two TPMI fields according to the two codebook subsets.

Optionally, as an embodiment, the determination module 402 is further used to determine the invalid TPMI domain in the two TPMI domains according to at least one of the following: whether a reserved code point is indicated; whether a codeword is enabled; whether the indicated precoding matrix combination exceeds a maximum rank limit.

Optionally, as an embodiment, the determination module 402 is further used to interpret only the first TPMI domain of the two TPMI domains when the SRI domain in the DCI indicates that the SRS of the J port is used for PUSCH transmission and j is less than K; or, interpret the two TPMI domains jointly; wherein J is a positive integer.

Optionally, as an embodiment, the DCI includes a first indication field, and the first indication field is used to indicate one of the following: the first TPMI field is valid; the second TPMI field is valid; and both TPMI fields are valid.

Optionally, as an embodiment, the DCI includes a second indication field, where the second indication field is used to indicate coefficients of the two first precoding matrices, and the coefficients are used to calculate the second precoding matrix.

Optionally, as an embodiment, the second precoding matrix is one of the following:

Wherein, _W1 and _W2 are the two first precoding matrices, and _W1 and _W2 are respectively associated with different SRSs; and α are coefficients.

Optionally, as an embodiment, the determination module 402 is further configured to determine a third precoding matrix for PUSCH transmission according to _W1 when one TPMI domain in the two TPMI domains indicates an invalid code point or an invalid precoding matrix and the other TPMI domain indicates a valid precoding matrix _W1 , wherein the third precoding matrix is one of the following:

Optionally, as an embodiment, the determination module 402 is also used to determine the number of codewords for PUSCH transmission of the K port according to the precoding indication; wherein, when the transmission rank is greater than the first value, two codewords are enabled, and/or, when two TPMI domains are valid, two codewords are enabled.

Optionally, as an embodiment, of the two codewords, the first codeword is mapped to P transmission layers, and the second codeword is mapped to Q transmission layers; wherein P is the rank number of W1, Q is the rank number of W2, W1 and W2 are the two first precoding matrices, and/or, P and Q are predefined, and P and Q are positive integers.

Optionally, as an embodiment, the rank of the second precoding matrix is the sum of the ranks of the effective first precoding matrices.

According to the device 400 of the embodiment of the present application, the process of the method 200 corresponding to the embodiment of the present application can be referred to, and the various units/modules in the device 400 and the above-mentioned other operations and/or functions are respectively for implementing the corresponding processes in the method 200, and can achieve the same or equivalent technical effects. For the sake of brevity, they will not be repeated here.

The PUSCH transmission device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or may be another device other than a terminal. For example, the terminal may include but is not limited to the types of the terminal 11 listed above, and other devices may be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

Fig. 5 is a schematic diagram of the structure of a PUSCH transmission device according to an embodiment of the present application, and the device may correspond to a network side device in other embodiments. As shown in Fig. 5, the device 500 includes the following modules.

The sending module 502 is used to send DCI, where the DCI is used to indicate two first precoding matrices, where the two first precoding matrices are used by the terminal to determine a second precoding matrix, where the second precoding matrix is used for PUSCH transmission of K ports, where K is a positive integer.

In the PUSCH transmission device provided in the embodiment of the present application, the sending module 502 sends DCI, where the DCI is used to indicate two first precoding matrices, where the two first precoding matrices are used by the terminal to determine a second precoding matrix, where the second precoding matrix is used for PUSCH transmission of K ports. In the embodiment of the present application, two precoding matrices that support PUSCH transmission of fewer ports can be used to implement multi-port PUSCH transmission, which is beneficial to improving the communication performance of the terminal.

Optionally, as an embodiment, the sending module 502 is also used to send configuration information, and the configuration information includes one or two SRS resource sets for codebook transmission; the one SRS resource set includes one of the following: at least one SRS of a K port; at least one SRS of an M port and at least one SRS of an N port; at least one SRS of a K port and at least one SRS of an L port; among the two SRS resource sets, one SRS resource set includes at least one SRS of an M port, and the other SRS resource set includes at least one SRS of an N port; wherein the SRS of the K port is used for PUSCH transmission of the K port; M+N=K, M, N and L are positive integers, L is less than K, and the SRS of the M port and the SRS of the N port are used for PUSCH transmission of the K port.

Optionally, as an embodiment, the DCI includes at least one SRI field, and the SRI field is used to indicate SRS, and the SRS is used for the PUSCH transmission.

Optionally, as an embodiment, the DCI includes two TPMI fields, and the two TPMI fields are used to indicate the two first precoding matrices.

According to the device 500 of the embodiment of the present application, the process of the method 300 corresponding to the embodiment of the present application can be referred to, and the various units/modules in the device 500 and the above-mentioned other operations and/or functions are respectively for implementing the corresponding processes in the method 300, and can achieve the same or equivalent technical effects. For the sake of brevity, they will not be repeated here.

The PUSCH transmission device provided in the embodiment of the present application can implement the various processes implemented in the method embodiments of Figures 2 to 3 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

Optionally, as shown in FIG6 , an embodiment of the present application further provides a communication device 600, including a processor 601 and a memory 602, wherein the memory 602 stores a program or instruction that can be run on the processor 601. For example, when the communication device 600 is a terminal, the program or instruction is executed by the processor 601 to implement the various steps of the above-mentioned PUSCH transmission method embodiment, and can achieve the same technical effect. When the communication device 600 is a network side device, the program or instruction is executed by the processor 601 to implement the various steps of the above-mentioned PUSCH transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

The embodiment of the present application also provides a terminal, including a processor and a communication interface, the processor is used to determine a second precoding matrix according to two first precoding matrices, the second precoding matrix is used for PUSCH transmission of K ports, K is a positive integer, and the communication interface is used to send PUSCH according to the second precoding matrix. This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to the terminal embodiment, and can achieve the same technical effect. Specifically, Figure 7 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

The terminal 700 includes but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709 and at least some of the components of a processor 710.

Those skilled in the art will appreciate that the terminal 700 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 710 through a power management system, so as to implement functions such as managing charging, discharging, and power consumption management through the power management system. The terminal structure shown in FIG7 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange components differently, which will not be described in detail here.

It should be understood that in the embodiment of the present application, the input unit 704 may include a graphics processing unit (GPU) 7041 and a microphone 7042, and the graphics processor 7041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 707 includes a touch panel 7071 and at least one of other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include two parts: a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as a volume control button, a switch button, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 701 can transmit the data to the processor 710 for processing; in addition, the RF unit 701 can send uplink data to the network side device. Generally, the RF unit 701 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

The memory 709 can be used to store software programs or instructions and various data. The memory 709 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 709 may include a volatile memory or a non-volatile memory, or the memory 709 may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 709 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

The processor 710 may include one or more processing units; optionally, the processor 710 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 710.

The radio frequency unit 701 may be configured to send the PUSCH according to the second precoding matrix.

The processor 710 may be configured to determine a second precoding matrix according to two first precoding matrices, where the second precoding matrix is used for PUSCH transmission of K ports, where K is a positive integer.

The terminal provided in the embodiment of the present application can determine a second precoding matrix based on the two first precoding matrices, and perform PUSCH transmission of K ports according to the second precoding matrix. The embodiment of the present application can use two precoding matrices that support PUSCH transmission of fewer ports to achieve multi-port PUSCH transmission, which is beneficial to improving the communication performance of the terminal. The terminal 700 provided in the embodiment of the present application can also implement the various processes of the above-mentioned PUSCH transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

The embodiment of the present application also provides a network side device, including a processor and a communication interface, the communication interface is used to send DCI, the DCI is used to indicate two first precoding matrices, the two first precoding matrices are used by the terminal to determine a second precoding matrix, the second precoding matrix is used for PUSCH transmission of K ports, K is a positive integer. The network side device embodiment corresponds to the above-mentioned network side device method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to the network side device embodiment, and can achieve the same technical effect.

Specifically, the embodiment of the present application also provides a network side device. As shown in Figure 8, the network side device 800 includes: an antenna 81, a radio frequency device 82, a baseband device 83, a processor 84 and a memory 85. The antenna 81 is connected to the radio frequency device 82. In the uplink direction, the radio frequency device 82 receives information through the antenna 81 and sends the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes the information to be sent and sends it to the radio frequency device 82. The radio frequency device 82 processes the received information and sends it out through the antenna 81.

The method executed by the network-side device in the above embodiment may be implemented in the baseband device 83, which includes a baseband processor.

The baseband device 83 may include, for example, at least one baseband board, on which a plurality of chips are arranged, as shown in FIG8 , wherein one of the chips is, for example, a baseband processor, which is connected to the memory 85 through a bus interface to call a program in the memory 85 and execute the network device operations shown in the above method embodiment.

The network side device may further include a network interface 86, which is, for example, a common public radio interface (CPRI).

Specifically, the network side device 800 of the embodiment of the present invention also includes: instructions or programs stored in the memory 85 and executable on the processor 84. The processor 84 calls the instructions or programs in the memory 85 to execute the methods executed by the modules shown in Figure 5 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned PUSCH transmission method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

An embodiment of the present application further provides a chip, which includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement each process of the above-mentioned PUSCH transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

An embodiment of the present application further provides a computer program/program product, which is stored in a storage medium, and is executed by at least one processor to implement the various processes of the above-mentioned PUSCH transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

An embodiment of the present application further provides a PUSCH transmission system, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the PUSCH transmission method described above, and the network side device can be used to execute the steps of the PUSCH transmission method described above.

It should be noted that, in this article, the term "comprises", "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM/RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present application and the claims, all of which are within the protection of the present application.

Claims (38)

1. A physical uplink shared channel PUSCH transmission method, characterized by including: The terminal determines a second precoding matrix based on the two first precoding matrices. The second precoding matrix is used for PUSCH transmission on the K port, and K is a positive integer; The terminal sends PUSCH according to the second precoding matrix. 2. The method according to claim 1, characterized in that before the terminal determines a second precoding matrix based on two first precoding matrices, the method further includes: the terminal receives configuration information, and the The configuration information includes one or two sounding reference signal SRS resource sets used for codebook transmission; The one SRS resource set includes one of the following: at least one K-port SRS; at least one M-port SRS and at least one N-port SRS; at least one K-port SRS and at least one L-port SRS; Of the two SRS resource sets, one SRS resource set includes at least one M-port SRS, and the other SRS resource set includes at least one N-port SRS; Wherein, the SRS of the K port is used for PUSCH transmission of the K port; M+N=K, M, N and L are positive integers, L is less than K, the SRS of the M port and the SRS of the N port Used for PUSCH transmission on the K port. 3. The method according to claim 2, characterized in that the SRS of the M port and the SRS of the N port in the one SRS resource set are associated in at least one of the following ways: The configuration information is explicitly configured; associated with the same spatial relationship; pre-defined; Determined based on the index size of the SRS resource. 4. The method according to claim 2, characterized in that the power control parameters configured in the two SRS resource sets are the same. 5. The method according to claim 2, characterized in that, when the terminal is configured with a full power transmission mode, the one SRS resource set includes at least one K-port SRS and at least one L-port SRS, The SRS of the K port is used for PUSCH transmission of the K port. 6. The method according to any one of claims 1 to 5, characterized in that before the terminal determines a second precoding matrix based on two first precoding matrices, the method further includes: The terminal receives downlink control information DCI, where the DCI is used to indicate the two first precoding matrices. 7. The method according to claim 6, wherein the DCI includes at least one SRI field, the SRI field is used to indicate SRS, and the SRS is used for the PUSCH transmission. 8. The method according to claim 7, characterized in that, When the configuration information configures an SRS resource set for the terminal, the DCI includes an SRI domain; When the configuration information configures two SRS resource sets for the terminal, the DCI includes one SRI domain or two SRI domains. 9. The method according to claim 7, characterized in that, in the one SRS resource set, the SRS of the M port is associated with the SRS of the N port; wherein the bit length of the SRI field is determined by the associated The number of SRS groups is determined; among them, the associated SRS is one group. 10. The method according to claim 7, characterized in that, In the case where the SRI field indicates the SRS of the K port, the PUSCH is transmitted using the K port; In the case where the SRI field indicates both the SRS of the M port and the SRS of the N port, the PUSCH is transmitted using the K port. 11. The method according to claim 6, wherein the DCI includes two transmission precoding matrix indication TPMI fields, and the two TPMI fields are used to indicate the two first precoding matrices. 12. The method according to claim 11, characterized in that the method further comprises: The terminal selects the two first precoding matrices from two codebook subsets according to the two TPMI fields. 13. The method according to claim 12, characterized in that the method further comprises: the terminal determines the two codebook subsets from a plurality of codebook subsets according to at least one of the following: The number of ports of the precoding matrix included in the codebook subset; Coherence type of codebook subset; The maximum rank information corresponding to the codebook subset. 14. The method according to claim 13, characterized in that the number of ports of the precoding matrices contained in the two codebook subsets is determined by one of the following: Configuration of SRS configured for the terminal; agreed value. 15. The method according to claim 13, characterized in that, The coherence types of the two codebook subsets include at least one of the following: fully coherent and fully coherent, partially coherent and partially coherent, incoherent and incoherent, partially incoherent and partially incoherent, fully partially incoherent and fully partially coherent. Not relevant. 16. The method according to claim 12, characterized in that the coherence types of the two codebook subsets are configured by RRC. 17. The method of claim 12, further comprising: The terminal determines the two codebook subsets according to the antenna port coherence type of the PUSCH transmission of the K port. 18. The method according to claim 17, characterized in that, When the antenna port coherence type is K-port fully coherent, the two codebook subsets are fully coherent and fully coherent; When the K ports are divided into two groups and the antenna ports in each group are fully coherent, the two codebook subsets are one of the following: fully partially incoherent and fully partially incoherent, fully coherent and partially coherent ; When the K port is divided into two groups, and each group contains two groups of coherent antenna ports, the two codebook subsets are one of the following: partially coherent and partially coherent, partially incoherent and partially incoherent; as well as When the K ports are divided into two groups, the antenna ports in the first group are fully coherent, part of the antenna ports in the second group are fully coherent, and the other part of the antenna ports are fully coherent, the two codebook subsets are as follows One: fully partially incoherent and partially incoherent, fully coherent and partially coherent. 19. The method of claim 13, further comprising: The terminal determines the maximum rank information corresponding to the two codebook subsets according to at least one of the following: RRC signaling configuration; wherein the RRC signaling is configured with the maximum rank information corresponding to the two codebook subsets respectively; The maximum rank corresponding to the first codebook subset is A, and the maximum rank corresponding to the second codebook subset is R _max -A; where A is obtained by rounding up or rounding down half of R _max ; The maximum rank corresponding to the first codebook subset and the second codebook subset is the smallest of the number of ports indicated by the SRS domain and R _max ; Wherein, the R _max is configured by RRC signaling. 20. The method of claim 13, further comprising: The terminal determines the bit length and meaning of the two TPMI fields based on the two codebook subsets. 21. The method according to claim 11, characterized in that the method further comprises: the terminal determines an invalid TPMI domain among the two TPMI domains according to at least one of the following: Whether reserved code points are indicated; Whether the codeword is enabled; Whether the indicated precoding matrix combination exceeds the maximum rank limit. 22. The method of claim 11, further comprising: When the SRI field in the DCI indicates that the SRS of port J is used for PUSCH transmission, and j is less than K, the terminal only interprets the first TPMI field of the two TPMI fields; or, The terminal jointly interprets the two TPMI fields; where J is a positive integer. 23. The method of claim 11, wherein the DCI includes a first indication field, and the first indication field is used to indicate one of the following: The first TPMI domain is valid; The second TPMI domain is valid; Both TPMI domains are valid. 24. The method according to claim 11, characterized in that the DCI includes a second indication field, the second indication field is used to indicate coefficients of the two first precoding matrices, and the coefficients are used to Calculate the second precoding matrix. 25. The method according to claim 11, characterized in that the second precoding matrix is one of the following: Wherein, W ₁ and W ₂ are the two first precoding matrices, and W ₁ and W ₂ are respectively associated with different SRS; and α are coefficients. 26. The method of claim 11, further comprising: In the case that one of the two TPMI fields indicates an invalid code point or an invalid precoding matrix, and the other TPMI field indicates a valid precoding matrix W ₁ , the terminal determines the method for use based on W ₁ The third precoding matrix for PUSCH transmission, where the third precoding matrix is one of the following: 27. The method according to claim 11, characterized in that the method further comprises: the terminal determines the number of codewords for PUSCH transmission of the K port according to the precoding indication; Among them, when the transmission rank is greater than the first value, two codewords are enabled; and/or When both TPMI fields are valid, both codewords are enabled. 28. The method according to claim 27, wherein among the two codewords, the first codeword is mapped to P transmission layers, and the second codeword is mapped to Q transmission layers; Wherein, P is the rank number of W ₁ , Q is the rank number of W ₂ , W ₁ and W ₂ are the two first precoding matrices, and/or, P and Q are predefined, and P and Q are Positive integer. 29. The method according to claim 1, wherein the rank of the second precoding matrix is the sum of the ranks of the effective first precoding matrices. 30. A PUSCH transmission method, characterized by including: The network side device sends DCI. The DCI is used to indicate two first precoding matrices. The two first precoding matrices are used by the terminal to determine a second precoding matrix. The second precoding matrix is used for K For PUSCH transmission on the port, K is a positive integer. 31. The method according to claim 30, characterized in that before the network side device sends DCI, the method further includes: the network side device sends configuration information, the configuration information includes one or two for SRS resource set for codebook transmission; The one SRS resource set includes one of the following: at least one K-port SRS; at least one M-port SRS and at least one N-port SRS; at least one K-port SRS and at least one L-port SRS; Of the two SRS resource sets, one SRS resource set includes at least one M-port SRS, and the other SRS resource set includes at least one N-port SRS; Wherein, the SRS of the K port is used for PUSCH transmission of the K port; M+N=K, M, N and L are positive integers, L is less than K, the SRS of the M port and the SRS of the N port Used for PUSCH transmission on the K port. 32. The method according to claim 30, wherein the DCI includes at least one SRI field, the SRI field is used to indicate SRS, and the SRS is used for the PUSCH transmission. 33. The method of claim 30, wherein the DCI includes two TPMI fields, and the two TPMI fields are used to indicate the two first precoding matrices. 34. A PUSCH transmission device, characterized in that it includes: Determining module, configured to determine a second precoding matrix based on two first precoding matrices, the second precoding matrix is used for PUSCH transmission of K port, K is a positive integer; A sending module, configured to send PUSCH according to the second precoding matrix. 35. A PUSCH transmission device, characterized in that it includes: A sending module, configured to send DCI. The DCI is used to indicate two first precoding matrices. The two first precoding matrices are used by the terminal to determine a second precoding matrix. The second precoding matrix is For PUSCH transmission on K port, K is a positive integer. 36. A terminal, characterized in that it includes a processor and a memory, the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the implementation of claim 1 to the steps of the method described in any one of 29. 37. A network-side device, characterized in that it includes a processor and a memory, the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the following are implemented: The steps of the method according to any one of claims 30 to 33. 38. A readable storage medium, characterized in that the readable storage medium stores programs or instructions, and when the programs or instructions are executed by a processor, the method of any one of claims 1 to 33 is implemented. step.