WO2023159575A1 - Communication method, terminal device, and network device - Google Patents

Abstract

Provided are a communication method, a terminal device, and a network device. The method comprises: a terminal device determines the size of a TPMI indication domain in a DCI and the length of the DCI according to first information, the DCI being used for scheduling uplink data to be transmitted; the terminal device obtains a first TPMI from the TPMI indication domain according to the size of the TPMI indication domain and the length of the DCI; and the terminal device determines a precoding matrix of the uplink data from a first codebook according to the first TPMI, the first information comprising one or more of: the number of first horizontal-dimension antenna ports, the number of first vertical-dimension antenna ports, an uplink RI constraint, a codebook subset constraint, the number of first DFT vectors in the first codebook, the number of phases between first polarization directions, offsets of DFT vectors between transport layers, the number of offsets of the DFT vectors between the transport layers, antenna array dimension information, and the number of beams. Thus, the number of bits occupied by the first TPMI carried by the DCI is reduced.

Description

Communication method, terminal device and network device technical field

The present application relates to the field of communication technologies, and more specifically, to a communication method, terminal equipment, and network equipment.

Background technique

With the development of communication technology, a class of terminal equipment such as customer premise equipment (CPE) and augmented reality (augmented reality, AR) equipment has been introduced. Such terminal equipment usually supports more than 4 antenna ports (for example, 8 antenna ports, 16 antenna ports, etc.) to meet the data transmission requirements of high transmission rates. In order to support the uplink transmission of this type of terminal equipment, an uplink codebook larger than 4 antenna ports needs to be introduced, which increases the size of the uplink codebook.

At this time, if the traditional 4-antenna port precoding matrix indication method is still followed, the network device and the terminal device pre-agreed to store a fixed codebook on the device, and instruct the terminal device to send the precoding matrix indication (transmit precoding matrix indicator, TPMI), so that the terminal device can determine the precoding matrix used to transmit uplink data in the uplink codebook based on TPMI, a large fixed codebook is required, which will cause the TPMI information carried in the DCI to be large and occupy too much transfer resources.

Contents of the invention

The present application provides a communication method, a terminal device and a network device, so as to reduce the number of bits occupied by the TPMI carried by the DCI (hereinafter referred to as "the first TPMI"), which is beneficial to the transmission resources occupied by the DCI.

In the first aspect, a communication method is provided, including: a terminal device determines the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, and the DCI is used to schedule uplink data to be transmitted; the terminal The device obtains the first TPMI from the TPMI indication field in the DCI according to the size of the TPMI indication field and the length of the DCI; the terminal device determines the first TPMI from the first codebook according to the first TPMI The precoding matrix of the uplink data, wherein the first information includes at least one of the following parameters: the number of antenna ports in the first horizontal dimension, the number of antenna ports in the first vertical dimension, uplink RI constraints, codebook subset constraints, The number of first DFT vectors in the first codebook, the number of phases between first polarization directions, the offset of DFT vectors between transmission layers, the number of offsets of DFT vectors between transmission layers, the terminal Antenna array dimension information of the device and the number of beams supported by the terminal device.

In a second aspect, a communication method is provided, including: the network device determines the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, and the DCI is used to schedule uplink data to be transmitted by the terminal device, the The TPMI indication field is used to carry the first TPMI, and the first TPMI is used to indicate the precoding matrix of the uplink data from the first codebook; the network device indicates the size of the field according to the TPMI and the DCI Length, generating the DCI; the network device sends the DCI to the terminal device; wherein, the first information includes at least one of the following parameters: the number of antenna ports in the first horizontal dimension, the number of antenna ports in the first vertical dimension Number of ports, uplink RI constraint, codebook subset constraint, number of first DFT vectors in the first codebook, number of phases between first polarization directions, offset of DFT vectors between transmission layers, transmission layer The number of offsets between the DFT vectors, the antenna array dimension information of the terminal device, and the number of beams supported by the terminal device.

In a third aspect, a terminal device is provided, including: a processing unit configured to determine the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, and the DCI is used to schedule uplink data to be transmitted; The processing unit is further configured to obtain the first TPMI from the TPMI indication field in the DCI according to the size of the TPMI indication field and the length of the DCI; the processing unit is further configured to obtain the first TPMI according to the first TPMI, determining the precoding matrix of the uplink data from the first codebook, wherein the first information includes at least one of the following parameters: the number of antenna ports in the first horizontal dimension, the number of antenna ports in the first vertical dimension, Uplink RI constraints, codebook subset constraints, the number of first DFT vectors in the first codebook, the number of phases between the first polarization directions, the offset of DFT vectors between transmission layers, and the DFT between transmission layers The number of vector offsets, the antenna array dimension information of the terminal device, and the number of beams supported by the terminal device.

In a fourth aspect, a network device is provided, including: a processing unit configured to determine the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, and the DCI is used to schedule uplink data to be transmitted by the terminal device , the TPMI indication field is used to carry a first TPMI, and the first TPMI is used to indicate the precoding matrix of the uplink data from the first codebook; the processing unit is further configured to indicate according to the TPMI field and the length of the DCI to generate the DCI; a sending unit configured to send the DCI to the terminal device, wherein the first information includes at least one of the following parameters: a first horizontal dimension antenna Number of ports, number of antenna ports in the first vertical dimension, uplink RI constraints, codebook subset constraints, the number of first DFT vectors in the first codebook, the number of phases between first polarization directions, and the number of phases between transmission layers The offset of the DFT vector, the amount of the offset of the DFT vector between transmission layers, the antenna array dimension information of the terminal device, and the number of beams supported by the terminal device.

In a fifth aspect, a terminal is provided, including a processor, a memory, and a communication interface, the memory is used to store one or more computer programs, and the processor is used to call the computer programs in the memory to make the terminal device execute Some or all of the steps in the method of the first aspect.

In a sixth aspect, a network device is provided, including a processor, a memory, and a communication interface, the memory is used to store one or more computer programs, and the processor is used to invoke the computer programs in the memory to make the network device Perform some or all of the steps in the method of the second aspect.

In a seventh aspect, the embodiment of the present application provides a communication system, where the system includes the above-mentioned terminal and/or network device. In another possible design, the system may further include other devices that interact with the terminal or network device in the solutions provided by the embodiments of the present application.

In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and the computer program causes a terminal to perform some or all of the steps in the method of the first aspect above.

In the ninth aspect, the embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and the computer program causes the network device to perform some or all of the steps in the method of the second aspect above .

In a tenth aspect, the embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable the terminal to execute the above-mentioned first Some or all of the steps in the method of one aspect. In some implementations, the computer program product can be a software installation package.

In an eleventh aspect, the embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a network device to execute Part or all of the steps in the method of the second aspect above. In some implementations, the computer program product can be a software installation package.

In a twelfth aspect, an embodiment of the present application provides a chip, the chip includes a memory and a processor, and the processor can call and run a computer program from the memory to implement the method described in the first aspect or the second aspect above some or all of the steps.

In the embodiment of the present application, the size of the first codebook can be adjusted through the first information, which is beneficial to reduce the number of bits occupied by the first TPMI carried by the DCI, so as to reduce the transmission resources occupied by the DCI transmission.

Description of drawings

FIG. 1 is a wireless communication system 100 applied in an embodiment of the present application.

Fig. 2 is a schematic diagram of a codebook-based uplink precoding process.

Fig. 3 is a schematic diagram of a beam group pattern applicable to an embodiment of the present application.

Fig. 4 is a schematic diagram of a pattern of another beam group applicable to the embodiment of the present application.

FIG. 5 is a schematic diagram of an arrangement manner of an antenna array when eight antenna ports are arranged horizontally.

FIG. 6 is a schematic diagram of an arrangement manner of an antenna array when 8 antenna ports are arranged horizontally and vertically.

FIG. 7 is a schematic diagram of an arrangement manner of an antenna array when eight antenna ports are arranged on four sides.

Fig. 8 is a schematic flowchart of a communication method according to an embodiment of the present application.

FIG. 9 is a schematic diagram of a terminal device according to an embodiment of the present application.

FIG. 10 is a schematic diagram of a network device according to an embodiment of the present application.

Fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed ways

The technical solution in this application will be described below with reference to the accompanying drawings.

FIG. 1 is a wireless communication system 100 applied in an embodiment of the present application. The wireless communication system 100 may include a network device 110 and a terminal device 120 . The network device 110 may be a device that communicates with the terminal device 120 . The network device 110 can provide communication coverage for a specific geographical area, and can communicate with the terminal device 120 located in the coverage area.

Figure 1 exemplarily shows one network device and two terminals. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within the coverage area. The embodiment does not limit this.

Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment of the present application.

It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, for example: the fifth generation (5th generation, 5G) system or new radio (new radio, NR), long term evolution (long term evolution, LTE) system , LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, and satellite communication systems, and so on.

The terminal equipment in the embodiment of the present application may also be called user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station (mobile station, MS), mobile terminal (mobile terminal, MT) ), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The terminal device in the embodiment of the present application may be a device that provides voice and/or data connectivity to users, and can be used to connect people, objects and machines, such as handheld devices with wireless connection functions, vehicle-mounted devices, and the like. The terminal device in the embodiment of the present application may be a mobile phone, a tablet computer (Pad), a notebook computer, a palmtop computer, a mobile internet device (mobile internet device, MID), a wearable device, a virtual reality (virtual reality, VR) equipment, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, smart Wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc. Optionally, UE can be used to act as a base station. For example, a UE may act as a scheduling entity that provides sidelink signals between UEs in V2X or D2D, etc. For example, a cell phone and an automobile communicate with each other using sidelink signals. Communication between cellular phones and smart home devices without relaying communication signals through base stations.

The network device in this embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be called an access network device or a wireless access network device, for example, the network device may be a base station. The network device in this embodiment of the present application may refer to a radio access network (radio access network, RAN) node (or device) that connects a terminal device to a wireless network. The base station can broadly cover various names in the following, or replace with the following names, such as: Node B (NodeB), evolved base station (evolved NodeB, eNB), next generation base station (next generation NodeB, gNB), relay station, Access point, transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), primary station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node , wireless node, access point (access point, AP), transmission node, transceiver node, base band unit (base band unit, BBU), remote radio unit (Remote Radio Unit, RRU), active antenna unit (active antenna unit) , AAU), radio head (remote radio head, RRH), central unit (central unit, CU), distributed unit (distributed unit, DU), positioning nodes, etc. A base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. A base station may also refer to a communication module, modem or chip used to be set in the aforementioned equipment or device. The base station can also be a mobile switching center, a device that undertakes the function of a base station in D2D, vehicle-to-everything (V2X), machine-to-machine (M2M) communication, and a device in a 6G network. Network-side equipment, equipment that assumes base station functions in future communication systems, etc. Base stations can support networks of the same or different access technologies. The embodiment of the present application does not limit the specific technology and specific device form adopted by the network device.

Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, a helicopter or drone may be configured to serve as a device in communication with another base station.

In some deployments, the network device in this embodiment of the present application may refer to a CU or a DU, or, the network device includes a CU and a DU. A gNB may also include an AAU.

Network equipment and terminal equipment can be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites in the air. In the embodiment of the present application, the scenarios where the network device and the terminal device are located are not limited.

It should be understood that all or part of the functions of the communication device in this application may also be realized by software functions running on hardware, or by virtualization functions instantiated on a platform (such as a cloud platform).

Uplink codebook transmission

In the process of interaction between the terminal device and the network device, data may be pre-encoded. Precoding processing can make data obtain precoding gains. Precoding processing can be divided into two parts: analog domain processing and digital domain processing. Analog domain processing maps the RF signal to the physical antenna for the transmitted analog signal. For example, analog domain processing can be achieved by means of beamforming. Digital domain processing is aimed at digital signals, and can map the data of the transport layer to the radio frequency port. Digital domain processing can be performed at baseband, eg precoding the digital signal using a precoding matrix.

For a terminal device, when sending uplink data to a network device, the terminal device may perform precoding processing on the uplink data. The precoding process can make uplink data obtain uplink precoding gain. For example, for a physical uplink shared channel (physical uplink share channel, PUSCH), the terminal device may perform precoding on the PUSCH.

Since the number of radio frequency channels of the terminal device is limited, when the terminal device performs precoding processing on the uplink data, the above two processing methods may be used at the same time. That is to say, the terminal device can precode the digital signal, and then perform beamforming on the analog signal.

For uplink data transmission, it can be divided into codebook-based transmission and non-codebook-based transmission. For codebook-based transmission, one codeword in the codebook may correspond to one precoding matrix. The precoding methods of codebook-based transmission and non-codebook-based transmission are different.

The following takes the uplink codebook-based precoding manner shown in FIG. 2 as an example to describe the uplink precoding process.

The network device may configure a sounding reference signal (sounding reference signal, SRS) resource (resource) set dedicated to codebook transmission for the terminal device. FIG. 2 is illustrated by taking N SRS resources included in the SRS resource set as an example, and N may be an integer greater than or equal to 1.

Step S210, the terminal device sends SRS on N SRS resources. Wherein, the SRS on each SRS resource may be transmitted using different beams.

In step S220, the network device selects one SRS resource (for example, the SRS resource with the best signal quality) from the N SRS resources. The SRS resource selected by the network device may be indicated through an SRS resource indicator (sounding reference signal resource indicator, SRI). The SRS resource indicated by the SRI can also be used to obtain uplink channel state information (channel state information, CSI). The network device may also determine at least one of the following information: a precoding matrix indicator (precoding matrix indicator, PMI), a rank indicator (rank indication, RI) or a channel quality indicator (channel quality indicator, CQI). Wherein, PMI can be selected from a codebook; RI or CQI can be obtained based on the selected PMI.

Step S230, the network device sends one or more of the following to the terminal device through downlink control information (DCI): SRI, transmit rank indicator (TRI), transmit precoding matrix indicator (transmit precoding One or more of matrix indicator, TPMI) and modulation and coding scheme (modulation and coding scheme, MCS).

In step S240, the terminal device may determine the number of layers based on the TRI, and determine the uplink precoding matrix (or precoder) corresponding to the TPMI from the codebook according to the TRI and the TPMI.

The terminal device may use the corresponding beam of the SRS resource indicated by the SRI to perform analog beamforming on the data.

Step S250, the terminal device sends the precoded uplink data and a demodulation reference signal (demodulation reference signal, DMRS) to the network device.

Uplink codebook design

Currently, uplink data transmission supports 2-port and 4-port transmission. Usually, different codebooks correspond to different numbers of antenna ports, or in the case of the same number of antenna ports, different transmission layers may also correspond to different codebooks. For ease of understanding, the following codebooks shown in Table 1 to Table 4 are used as examples for introduction. It should be noted that, in Table 1 to Table 4, the TPMI index (TPMI index) can be used to indicate the precoding vector W. In addition, among the multiple precoding vectors shown in the second column in Table 1 to Table 4, the TPMI indexes corresponding to the multiple precoding vectors in order from left to right are increasing.

Table 1 shows the codebook used when the number of antenna ports is 2 and the transmission layer 1 is used. Table 2 shows that the number of antenna ports is 4, discrete Fourier transform spread orthogonal frequency division multiplexing (discrete Fourier transform spread orthogonal frequency division multiplexing, DFT-S-OFDM) is used as the modulation method, and transmission layer 1 transmits the codebook used. Table 3 shows that the number of antenna ports is 4, cyclic prefix orthogonal frequency division multiplexing (cyclic prefix orthogonal frequency division multiplexing, CP-OFDM) is used as the modulation method, and the codebook used in the transmission of the transmission layer 1 is used. Table 4 shows the codebook used when the number of antenna ports is 2, DFT-S-OFDM is used as the modulation mode, and the transmission layer 2 is transmitted. Table 5 shows the codebook used when the number of antenna ports is 2, CP-OFDM is used as the modulation technique, and the transmission layer 2 is transmitted. Table 6 shows the codebook used when the number of antenna ports is 4, CP-OFDM is used as the modulation mode, and the transmission layer 3 is transmitted. Table 7 shows the codebook used when the number of antenna ports is 4, CP-OFDM is used as the modulation mode, and the transmission layer 4 is transmitted.

Table 1

Table 2

table 3

Table 4

table 5

Table 6

Table 7

Referring to Table 1 to Table 7, the number of antenna ports corresponding to the codebook (also called "uplink codebook") used in the uplink transmission process is 2 or 4. In the downlink transmission process, since the network equipment has a large number of antenna ports, the codebook (also called "downlink codebook") used in the downlink transmission process stipulated in the current communication protocol includes antenna ports with more than 4 antenna ports. The number of corresponding codebooks.

Downstream codebook design

The Type I codebook is described below as an example. The Type I codebook can support more than 4 antenna ports.

B＝[b _i]，i＝0，……，L-1，其中，b _i表示L个过采样的DFT波束；L表示过采样DFT波束的总数；W ₂表示极化方向之间的相位。 The Type I codebook can be expressed as W=W ₁ W ₂ , and,

B=[b _i ], i=0,..., L-1, where, b _i represents L oversampled DFT beams; L represents the total number of oversampled DFT beams; _W2 represents the phase between polarization directions .

Generally, when the rank is 1 or 2, two values of L=1 and L=4 are supported, and the value of L can be configured by the network device. When the rank is 3 or 4, only one value of L=1 is supported. If L=1, W ₂ only represents the phase between two polarization directions. If L=4, W ₂ is used to select a beam from the beam group (or DFT vector group) corresponding to W ₁ and feed back the phase between polarization directions.

For ease of understanding, patterns of two possible beam groups are shown below in conjunction with FIG. 3 and FIG. 4 . The beam group pattern shown in FIG. 3 is a beam group pattern based on horizontally arranged antenna ports when L=4. The beam group pattern shown in FIG. 4 is a beam group pattern based on two-dimensionally arranged horizontal and vertical antenna ports when L=4.

At present, the codebook subset restriction (CSR) for the Type I codebook is also introduced in the NR communication protocol. When the terminal device reports channel state information (CSI), it cannot report the PMI corresponding to the beam constrained by the CSR or the PMI constrained by the CSR in a certain rank. It should be understood that in general the size of the CSI is not affected by codebook subset constraints. In some implementations, codebook subset constraints can be configured separately for each DFT beam and each rank. In some other implementation manners, the above codebook subset constraints may be configured by a network device.

With the development of communication technology, a class of terminal equipment such as customer premise equipment (CPE) and augmented reality (augmented reality, AR) equipment has been introduced. Such terminal equipment usually supports more than 4 antenna ports (for example, 8 antenna ports, 16 antenna ports, etc.) to meet the data transmission requirements of high transmission rates. In order to support the uplink transmission of this type of terminal equipment, an uplink codebook larger than 4 antenna ports needs to be introduced, which increases the size of the uplink codebook. At this time, if the traditional precoding matrix indication method is still followed, the network device indicates TPMI to the terminal device through DCI, so that the terminal device can determine the precoding matrix used for transmitting uplink data in the uplink codebook based on TPMI, which will cause The number of bits occupied by the carried TPMI is relatively large, which occupies too many transmission resources.

In order to avoid the above problems, the embodiment of the present application provides a communication method to adjust the size of the uplink codebook (hereinafter referred to as "first codebook") through the first information, which is beneficial to reduce the TPMI (hereinafter referred to as "first codebook") carried by DCI. The number of bits occupied by the "first TPMI") to reduce transmission resources occupied by transmitting DCI. Wherein, the first information includes one or more of the following parameters: the number of antenna ports in the first horizontal dimension, the number of antenna ports in the first vertical dimension, uplink RI constraints, codebook subset constraints, the first The number of DFT vectors, the number of phases between the first polarization directions, the offset of DFT vectors between transmission layers, the number of offsets of DFT vectors between transmission layers, the antenna array dimension information of terminal equipment, and the beams supported by terminal equipment quantity. For ease of understanding, the above parameters are first introduced below, and then the communication method according to the embodiment of the present application is introduced in conjunction with FIG. 8 .

Parameter 1: the number of antenna ports in the first horizontal dimension, which is used to indicate the number of antenna ports in the horizontal direction, and can be represented by N ₁ .

Parameter 2: the number of antenna ports in the first vertical dimension, which is used to indicate the number of antenna ports in the vertical direction, which can be represented by N ₂ .

In some cases, the above parameter 1 and parameter 2 can be used in combination, for example, N ₁ =4, N ₂ =1, or N ₁ =2, N ₂ =2. Certainly, the foregoing parameter 1 and parameter 2 may also be used independently, which is not limited in this embodiment of the present application.

Parameter 3: Uplink RI constraint, used to indicate the rank that can be indicated in DCI, where the value of the rank that can be indicated in DCI is also used to determine the TPMI that can be indicated in DCI.

In some implementation manners, the above-mentioned uplink RI constraint may directly indicate the rank that can be indicated in the DCI. For example, the uplink RI constraint may use a bitmap (bitmap) to indicate the rank that can be indicated by the DCI. Assuming that the maximum rank value supported by the terminal device is 4, the rank that can be indicated through the DCI can be indicated through a 4-bit bitmap. Each rank supported by the terminal device may correspond to a bit in the bitmap, and when a bit in the bit in the bitmap is the first value, it means that the rank corresponding to the bit can be indicated by the DCI. When the bit in the bit in the bitmap is the second value, it means that the rank corresponding to the bit may not be indicated by the DCI, wherein the first value and the second value are different.

In an implementation manner, the uplink RI constraint may also indicate the maximum rank that can be indicated in the DCI. For example, if the value indicated by the uplink RI constraint is 2, the ranks that can be indicated in the DCI are 1 and 2.

The rank value that can be indicated in the above DCI is also used to determine the TPMI that can be indicated in the DCI. In other words, the TPMI that can be indicated in the DCI is determined according to the Rank value. It can be understood that the DCI can only indicate the value corresponding to the currently allowed Rank value. TPMI. For example, assuming that the uplink RI constraint indicates that the rank that can be indicated through DCI is the rank corresponding to the bit with a value of 1 in the bitmap, then the TPMI can be indicated through DCI as the TPMI corresponding to the rank corresponding to the bit with a value of 1, that is The precoding matrix can only be selected from the codebook corresponding to the currently allowed Rank value.

In some other implementation manners, the above-mentioned uplink RI constraint may indirectly indicate the rank that can be indicated in the DCI by indicating the rank that cannot be indicated by the DCI. Certainly, the above-mentioned uplink RI constraint may also indicate the ranks that cannot be indicated by the DCI and the ranks that may be indicated by the DCI. This embodiment of the present application does not specifically limit it.

In the embodiment of the present application, the rank indicated by DCI can be controlled through the above-mentioned uplink RI constraint, so as to avoid indicating the TPMI corresponding to the unnecessary rank indicated by DCI, which is beneficial to reduce the size of the first codebook indicated by DCI and reduce transmission Transmission resources occupied by DCI. For example, a terminal device at the edge of a cell usually performs uplink transmission based on the TPMI corresponding to the low-rank value. At this time, the TPMI corresponding to the high-rank value can be constrained by the uplink RI, and the TPMI corresponding to the high-rank value can be not indicated through DCI, so as to reduce the overhead of DCI signaling transmission, thereby Improve the PDCCH detection performance of the terminal equipment.

Parameter 4: Codebook subset constraints, used to indicate one or more of the DFT vectors available in the first codebook, the inter-polarization phases available in the first codebook, and the codewords available in the first codebook .

In some implementations, the above codebook subset constraints may directly indicate the DFT vectors available in the first codebook. In some other implementation manners, the above codebook subset constraint may indirectly indicate the available DFT vectors in the first codebook by indicating the unavailable DFT vectors in the first codebook. Of course, the above-mentioned codebook subset constraint may indicate available DFT vectors and unavailable DFT vectors at the same time. This embodiment of the present application does not specifically limit it.

For example, the codebook subset constraint can indicate the DFT vectors available in the first codebook in the form of a bitmap, each bit in the bitmap corresponds to a candidate DFT vector, and the bit corresponding to the first value in the bitmap corresponds to the candidate The DFT vector is a DFT vector available in the first codebook, and the candidate DFT vector phase corresponding to the bit whose value is the second value in the bitmap is a DFT vector unavailable in the first codebook.

In the embodiment of the present application, since the first codebook is generated according to the DFT vector, the size of the first codebook can be controlled by indicating the available DFT vector.

In some implementations, the above codebook subset constraints may directly indicate the available inter-polarization phases in the first codebook. In some other implementation manners, the above-mentioned codebook subset constraint may indirectly indicate the available inter-polarization phases in the first codebook by indicating the unavailable inter-polarization phases in the first codebook. Of course, the above-mentioned codebook subset constraint may simultaneously indicate available inter-polarization phases and unavailable inter-polarization phases. This embodiment of the present application does not specifically limit it.

For example, the codebook subset constraint can indicate the available inter-polarization phase in the first codebook in the form of a bitmap, each bit in the bitmap corresponds to a candidate inter-polarization phase, and the value in the bitmap is the first The candidate inter-polarization phase corresponding to the bit of the first value is the inter-polarization phase available in the first codebook, and the candidate inter-polarization phase corresponding to the bit with the second value in the bitmap is the first Inter-polarization phase not available in the codebook.

In the embodiment of the present application, since the first codebook is generated according to the inter-polarization phase, the size of the first codebook can be controlled by indicating the available inter-polarization phase through codebook subset constraints.

In some implementations, the above-mentioned codebook subset constraints may directly indicate codewords available in the first codebook. In some other implementation manners, the above-mentioned codebook subset constraint may indirectly indicate available codewords in the first codebook by indicating unavailable codewords in the first codebook. Of course, the above-mentioned codebook subset constraints may indicate both available codewords and unavailable codewords. This embodiment of the present application does not specifically limit it.

For example, the codebook subset constraint can indicate the available codewords in the first codebook in the form of a bitmap, each bit in the bitmap corresponds to a candidate codeword, and the bit whose value is the first value in the bitmap corresponds to The candidate codewords of are available codewords in the first codebook, and the candidate codewords corresponding to the bits whose value is the second value in the bitmap are unavailable codewords in the first codebook.

In this embodiment of the application, the DFT vectors available in the first codebook, the inter-polarization phases available in the first codebook and one of the codewords available in the first codebook can be controlled through the above-mentioned codebook constraint subset or more, which is beneficial to adjust the size of the first codebook and reduce the transmission resources occupied by DCI transmission. For example, for a slow-moving terminal device or a stationary terminal device, the change in its communication environment is small, and the available DFT vectors, available inter-polarization phases, and available codewords corresponding to such terminal devices are relatively fixed. Therefore, it is possible to By eliminating some DFT vectors, inter-polarization phases, and codewords that the terminal equipment will not correspond to based on the codebook constraint subset, the size of the first codebook can be adjusted to reduce the transmission resources occupied by DCI transmission, thereby improving the efficiency of the terminal equipment. PDCCH detection performance.

Parameter 5: the number of first DFT vectors may include the number of first horizontal dimension DFT vectors and/or the number of first vertical dimension DFT vectors.

In an implementation manner, each horizontal-dimensional DFT vector may correspond to one horizontal beam, and correspondingly, the number of horizontal-dimensional DFT vectors is the number of horizontal-dimensional beams. In some other implementation manners, each DFT vector in the vertical dimension may correspond to a vertical beam, and correspondingly, the number of DFT vectors in the vertical dimension is the number of beams in the vertical dimension.

For example, the number of first DFT vectors only includes the number of DFT vectors in the first horizontal dimension. In this case, the number of first DFT vectors may be one of 4, 8, 16 and 32. For another example, the quantity of the first DFT vector comprises the quantity of the first horizontal dimension DFT vector and the quantity of the first vertical dimension DFT vector, the quantity of the first horizontal dimension DFT vector and the quantity of the first vertical dimension DFT vector can be {4, 4}, {8, 8}, {4, 16} and one of {2, 32}.

Generally, the terminal device can determine the codewords in the first codebook based on the first DFT vector, or in other words, the number of the first DFT vectors directly affects the size of the first codebook corresponding to the terminal device. In the embodiment of the present application, the number of the above-mentioned first DFT vectors is adjusted according to the channel environment of the terminal device, and different numbers of first DFT vectors are configured for different terminal devices, so as to avoid configuring unnecessary first DFT vectors for the terminal device , at the same time, it also prevents the terminal device from determining the corresponding codeword based on the unnecessary first DFT, which reduces the number of codewords in the first codebook corresponding to the terminal device to a certain extent (or in other words, reduces the number of codewords in the first codebook size), thereby reducing the transmission overhead of DCI signaling.

Parameter 6: The number of phases between the first polarization directions is related to the value of the phase between the first polarization directions.

此时，第一极化方向间相位数量K＝8。 It is assumed that the value of the phase between the first polarization directions can be expressed as [1, q]. In some implementation manners, if q is a binary phase shift keying (binary phase shift keying, BPSK) element {1, −1}, at this time, the number of phases between the first polarization directions K=2. If q is a quadrature phase shift keying (quadrature phase shift keying, QPSK) element {1, -1, j, -j}, at this time, the number of phases between the first polarization directions K=4. If q is an 8 phase shift keying (8 phase shift keying, 8PSK) element

At this time, the number of phases between the first polarization directions K=8.

That is to say, the above-mentioned first information may use the quantity of the first inter-polarization phase to indicate whether the inter-polarization phase adopts BPSK elements, QPSK elements, or 8PSK elements.

In this embodiment of the present application, according to the channel environment of the terminal device, different numbers of inter-polarization phases can be configured for different terminal devices, so as to avoid configuring too many first inter-polarization phases for the terminal device, thereby reducing Transmission overhead of DCI signaling.

Parameter 7: the offset of the DFT vector between the transmission layers, indicating the offset (offset) between the indices of the DFT vectors corresponding to the two transmission layers. That is to say, the index of the DFT vector corresponding to another transmission layer can be obtained according to the DFT vector offset between the transmission layers and the index of the DFT vector corresponding to one transmission layer. In some cases, the above-mentioned DFT vector offsets between transmission layers are values in {0, 2, 4, 8, 16}.

Parameter 8: the number of offsets of DFT vectors between transmission layers, indicating the number of candidate values of offsets (offsets) between indices of DFT vectors corresponding to two transmission layers.

Parameter 9: The antenna array dimension information of the terminal device can include the number of horizontal-dimensional antenna ports and the number of vertical-dimensional antenna ports supported by the terminal device. For the introduction of the number of horizontal-dimensional antenna ports and the number of vertical-dimensional antenna ports, please refer to the above. Introduction of parameter 1 and parameter 2.

Of course, in some cases, the antenna array dimension information of the terminal device may also include an arrangement manner of the antenna array of the terminal device. Wherein, the arrangement of the antenna array may include one or more of horizontal arrangement, horizontal and vertical two-dimensional arrangement, and four-sided arrangement.

Parameter 10: The number of beams supported by the terminal equipment. In some implementation manners, the number of beams supported by the terminal device may include the number of beams in the horizontal dimension and/or the number of beams in the vertical dimension. For example, the beams supported by the terminal device may include eight beams in the horizontal dimension. For another example, the beams supported by the terminal device may include four beams in the horizontal dimension and four beams in the vertical dimension.

For ease of understanding, the arrangement of the antenna array will be described below with reference to FIG. 5 to FIG. 7 . It should be understood that, in the arrangements of the antenna arrays shown in FIGS. 5 to 8 , the indexes of the antenna ports are 0-7. FIG. 5 shows a schematic diagram of an arrangement manner of an antenna array when 8 antenna ports are arranged horizontally. FIG. 6 shows a schematic diagram of an arrangement manner of an antenna array when 8 antenna ports are arranged horizontally and vertically. FIG. 7 shows a schematic diagram of an arrangement manner of an antenna array when 8 antenna ports are arranged on four sides.

Fig. 8 is a schematic flowchart of a communication method according to an embodiment of the present application. The method shown in FIG. 8 includes steps S810 to S860.

In step S810, the network device determines the size of the TPMI indication field in the DCI and the length of the DCI according to the first information.

The foregoing DCI is used to schedule uplink data to be transmitted by the terminal equipment.

The above TPMI indication field is used to carry the first TPMI, and the first TPMI is used to indicate the precoding matrix of the uplink data from the first codebook. In some implementation manners, if the DCI is coded jointly by RI and TPMI, the TPMI information indication field may also carry the first RI. Of course, in some other implementation manners, the above TPMI information indication field may carry the first TPMI.

In step S820, the network device generates DCI according to the size of the TPMI indication field and the length of the DCI.

In step S830, the network device sends DCI to the terminal device.

In step S840, the terminal device determines the size of the TPMI indication field in the DCI and the length of the DCI according to the first information.

In step S850, the terminal device obtains the first TPMI from the TPMI indication field in the DCI according to the size of the TPMI indication field and the length of the DCI.

In some implementations, the terminal device can detect the DCI sent by the network device according to the length of the DCI, and obtain the TPM information indication field from the detected DCI according to the size of the TPMI indication field, and then obtain the first TPMI information indication field from the TPMI information indication field. - the value of TPMI.

In step S860, the terminal device determines the precoding matrix of the uplink data from the first codebook according to the first TPMI.

In this embodiment of the present application, the foregoing first codebook may be pre-agreed by the network device and the terminal device. In some implementation manners, the terminal device may determine the DFT vector in the first codebook and/or the inter-polarization phase in the first codebook according to the first information; and determine the DFT vector in the first codebook and/or the first The inter-polarization phases in the codebook generate a first codebook.

It should be noted that the above-mentioned process of generating the first codebook can be performed at any time between the terminal device obtaining the first information and the terminal device determining the precoding matrix from the first codebook (that is, step S850) . For example, it can be performed before step S840. For another example, it may be performed after step S840 and before step S860. This embodiment of the present application does not limit it.

As introduced above, the above step S810 and step S840 both involve determining the size of the TPMI indication field in the DCI and the length of the DCI according to the first information. In some implementation manners, the above steps may include determining the size of the TPMI indication field according to the first information; and determining the length of the DCI according to the size of the TPMI indication field. Wherein, determining the length of the DCI according to the size of the TPMI indication field may include directly determining the length of the DCI based on the size of the TPMI indication field, or determining the length of the DCI based on the size of the TPMI indication field and sizes of other indication fields.

For ease of understanding, the method for determining the size of the TPMI indication field is introduced below in conjunction with determination mode 1 to determination mode 8, taking the first information including each of the above parameters as an example. It should be noted that the terminal device and the network device determine the size of the TPMI indication field in a similar manner, which will not be distinguished below. That is to say, the determination manner described below can be applied to a terminal device or a network device.

Determination method 1: If the first information includes the number of antenna ports in the first horizontal dimension and the number of antenna ports in the first vertical dimension {N ₁ , N ₂ }, it can be based on the number of antenna ports in the first horizontal dimension and the number of antenna ports in the first vertical dimension The number of antenna ports determines the number of second DFT vectors in the first codebook; and determines the size of the TPMI indication field according to the number of second DFT vectors.

The definition of the quantity of the above-mentioned second DFT vector is the same as the definition of the quantity of the first DFT vector, in addition, the parameter for determining the quantity of the second DFT vector has the same meaning as the parameter for determining the quantity of the first DFT vector, can See the related introduction of parameter 5 above. In some implementations, the above-mentioned number L' of the second DFT vectors includes the number L ₃ of the second horizontal dimension DFT vectors and the number L ₄ of the second vertical dimension DFT vectors, and the number L ₃ of the second horizontal dimension DFT vectors = N ₁ O ₃ , the number of DFT vectors in the second vertical dimension L ₄ =N ₂ O ₄ , where N ₁ represents the number of antenna ports in the first horizontal dimension, O ₃ represents the sampling coefficient in the second horizontal dimension, and N ₂ represents the The number of antenna ports in the first vertical dimension, O ₄ represents the sampling coefficient in the second vertical dimension. In some cases, the number of the above-mentioned second DFT vectors may be one of 4, 8, 16, 32, 64, for example.

The above-mentioned second horizontal dimension sampling coefficient _O3 and second vertical dimension sampling coefficient _O4 may be configured by the network device, or pre-agreed between the terminal device and the network device, which is not limited in this embodiment of the present application.

比特。 Determination mode 2. If the first information includes the uplink RI constraint, the number of TPMIs available in the first codebook can be determined according to the rank value indicated by the uplink RI constraint; and the TPMI indication field can be determined according to the number of available TPMIs the size of. For example, assuming that the number of TPMIs available in the first codebook is N _TPMI1 , the size of the TPMI indication field can be

bit.

Determination mode 3. If the first information includes codebook subset constraints, the size of the TPMI indication field may be determined according to the codebook subset constraints.

比特。 For example, assuming that the uplink codebook subset constraint indicates available DFT vectors and available inter-polarization phases in the first codebook, and the number of available DFT vectors in the first codebook is L _{DFT 1} , in the first codebook The available number of phases between polarization directions is K ₁ , and the TPMI number M _TPMI1 that can be indicated by the TPMI indication field can be determined according to the formula M _TPMI1 = _{LDFT 1} ×K ₁ . Correspondingly, the size of the TPMI field is

bit.

Determination mode 4. If the first information includes the number of first DFT vectors in the first codebook, then determination mode 4 can be divided into two types: determination mode 4-1 and determination mode 4-2.

In determination mode 4-1, the size of the first codebook can be determined according to the number of the first DFT vectors and the phase number between the second polarization directions; then the size of the TPMI indication field can be determined according to the size of the first codebook.

比特。 Assuming that the number L of the first DFT vector includes the number L ₁ of the horizontal dimension DFT vector and the number L ₂ of the vertical dimension DFT vector, and the number of phases between the second polarization directions is K ₂ , then the size of the first codebook is M _codebook = K ₂ ×L ₁ ×L ₂ , the size of the TPMI field is

bit.

It should be noted that, the above-mentioned phase between the second polarization directions may be the quantity of the phase between the first polarization directions in the first information. Of course, the number of phases between the second polarization directions may also be pre-agreed.

再根据DFT向量指示信息的比特数，确定TPMI指示域的大小。 In the determination mode 4-2, according to the quantity L of the first DFT vector, it is determined that the bit number of the DFT vector indication information included in the TPMI indication field is

Then, according to the bit number of the DFT vector indication information, the size of the TPMI indication field is determined.

确定，或者，TPMI指示域中包括的DFT向量指示信息的比特数可以根据公式

确定。 Assuming that the number L of the first DFT vectors includes the number L ₁ of the first horizontal dimension DFT vectors and the number L ₂ of the first vertical dimension DFT vectors, the number of bits of the DFT vector indication information included in the TPMI indication field can be calculated according to the formula

Determine, or, the number of bits of the DFT vector indication information included in the TPMI indication field can be according to the formula

Sure.

Determination mode 5, if the first information includes the quantity K of phases between the first polarization directions. Then the determination method 5 can be further divided into two types: a determination method 5-1 and a determination method 5-2.

In the determination method 5-1, the size of the first codebook can be determined according to the number K of phases between the first polarization directions and the number L″ of the third DFT vector; then, the TPMI indication can be determined according to the size of the first codebook The size of the domain.

比特。 In some implementations, assuming that the number of phases between the first polarization directions is K, and the number of third DFT vectors is L", the size of the first codebook is M _codebook2 =L"*K, correspondingly, the above TPMI The domain size is

bit.

It should be noted that the definition of the quantity of the third DFT vector is the same as the definition of the quantity of the first DFT vector. In addition, the parameters used to determine the quantity of the third DFT vector are the same as the parameters used to determine the quantity of the first DFT vector have the same meaning, please refer to the introduction of parameter 5 above.

In some implementation manners, the number of the third DFT vectors may be the same as the number of the first DFT vectors in the first information, or in other words, the number of the third DFT vectors is equal to the number of the first DFT vectors. In other implementation manners, the number of the third DFT vectors may also be pre-agreed by the terminal device and the network device.

再根据极化方向间相位指示信息的比特数，确定TPMI指示域的大小。 In the determination mode 5-2, according to the quantity K of the phase between the first polarization directions, it is determined that the number of bits of the phase indication information between the polarization directions included in the TPMI indication field is

Then, according to the number of bits of the phase indication information between polarization directions, the size of the TPMI indication field is determined.

Determination mode 6, if the first information includes the number of DFT vector offsets between transmission layers, then the number of DFT vector offsets between transmission layers in the TPMI indication field can be determined according to the number of DFT vector offsets between transmission layers The number of bits of the indication information; and then according to the number of bits of the indication information of the number of DFT vector offsets between transmission layers, the size of the TPMI indication field is determined.

In one implementation, assuming that the number of DFT vector offsets between transmission layers is R, the number of bits of the indication information of the number of DFT vector offsets between transmission layers is

Determination mode 7, if the first information includes the antenna array dimension information of the terminal device, based on the above introduction to the antenna array dimension information (parameter 9), it can be known that the antenna array dimension information may include the number of horizontal dimension antenna ports supported by the terminal device and The number of antenna ports in the vertical dimension, then the size of the TPMI indication field can be determined based on the antenna array dimension information. For the specific method based on it, please refer to the above determination method 1.

In other implementations, the above-mentioned number of horizontal-dimensional antenna ports and the number of vertical-dimensional antenna ports can also be used to determine the number of DFT vectors in the first codebook, and then determine the TPMI based on the number of DFT vectors in the first codebook Indicates the size of the domain. For the method of determining the size of the TPMI indication field, refer to the relevant introduction of the determination method 4. For the sake of brevity, details are not repeated here.

Determination mode 8, if the first information includes the number of beams supported by the terminal device, then the size of the first codebook can be determined according to the number of beams and the phase number between the third polarization directions; then the TPMI can be determined according to the size of the first codebook Indicates the size of the domain.

比特。 Assuming that the number B of beams includes the number B ₁ of horizontal beams and the number B ₂ of vertical beams, and the number of phases between the third polarization directions is K ₃ , then the size of the first codebook is M _codebook3 = K ₃ × B ₁ ×B ₂ , the size of the TPMI field is

bit.

It should be noted that, if the first information includes the number of phases between the first polarization directions, the above-mentioned third phase between polarization directions may be the number of phases between the first polarization directions. Of course, the number of phases between the third polarization directions may also be pre-agreed. In addition, for the definition of the quantity of phases between the third polarization directions above, refer to the definition of the quantity of phases between the first polarization directions above, and for the sake of brevity, details are not repeated here.

As described above in conjunction with determining manner 1 to determining manner 8, the manner of determining the size of the TPMI indication field is based on each parameter in the first information. It should be noted that the solutions in the embodiments of the present application are not limited to the above eight determination methods. In some cases, when the first information includes multiple parameters above, the size of the TPMI indication field may be determined in combination with the multiple parameters. Since there are too many ways to combine the above parameters, this application does not list them one by one. The following only introduces the number of first DFT vectors included in the first information, the number of phases between the first polarization directions and the number of DFT vector offsets between transmission layers as an example.

在另一些实现方式中，上述TPMI信息指示域的大小可以为

或者，上述TPMI信息指示域的大小还可以为

Assume that the number of the above-mentioned first DFT vectors is L, the number of phases between the first polarization directions is L, and the number of DFT vector offsets between transmission layers is R. In some implementations, the size of the above TPMI information indication field may be

In other implementations, the size of the above TPMI information indication field may be

Alternatively, the size of the above TPMI information indication field may also be

在另一些实现方 式中，上述TPMI信息指示域的大小可以为

或者，上述TPMI信息指示域的大小还可以为

Assuming that the number of the above-mentioned first DFT vectors includes the number L ₁ of the first horizontal dimension DFT vectors and the number L ₂ of the first vertical dimension DFT vectors, and the number of phases between the first polarization directions is K, the DFT vectors between the transmission layers are biased The amount of shift is R. In some implementations, the size of the above TPMI information indication field may be

In other implementations, the size of the above TPMI information indication field may be

Alternatively, the size of the above TPMI information indication field may also be

Based on the parameters included in the first information introduced above, the present application provides two ways of determining the first information. In some implementation manners, the foregoing first information may be sent by the network device to the terminal device. Correspondingly, when the network device determines the first information, the network device may determine based on the signal sent by the terminal device. For example, the network device may receive a sounding reference signal (sounding reference signal, SRS) sent by the terminal device, and determine the first information according to channel information obtained from the SRS. For another example, the network device may determine the first information based on a neural network. Wherein, the input of the neural network model may be actual channel information, and the output may be some or all parameters in the first information (for example, the antenna array dimension, the number of antenna ports in the horizontal dimension and the number of antenna ports in the vertical dimension, etc.). In addition, the neural network model can be trained based on training data under a certain channel assumption. During the training process, the input of the neural network model can be the channel information under the above channel assumption. Correspondingly, the output can include the first channel information corresponding to the channel information. - information (for example, antenna array dimension, number of antenna ports in horizontal dimension and number of antenna ports in vertical dimension, etc.).

In other implementation manners, the foregoing first information may also be determined by the terminal device based on terminal capability information. Correspondingly, the network device may also be determined based on the terminal capability information. In some implementation manners, the terminal capability information may include antenna array dimension information of the terminal device and the number of beams supported by the terminal device. Certainly, the foregoing terminal capability information may also include other information for determining parameters in the first information, which is not limited in this embodiment of the present application.

In this embodiment of the present application, the terminal device may directly determine the parameters in the first information based on the terminal capability information. Correspondingly, the network device may also determine the parameters in the first information based on the terminal capability information, so as to prevent the network device from The first information is indicated to the terminal device, so as to simplify the communication process between the terminal device and the network device.

Of course, in the embodiment of the present application, the first information may also be jointly determined based on the terminal capability information and the indication of the network device, which is not limited in the embodiment of the present application. For example, assume that the first information includes antenna array dimension information, the number of phases between the first polarization directions, and the number of DFT vector offsets between transmission layers, where the antenna array dimension information may be determined based on terminal capability information, and the first The number of phases between polarization directions and the number of DFT vector offsets between transmission layers can be configured by network devices.

Usually, the channel environment between the terminal device and other terminal devices is different, therefore, the codebook used by each terminal device to select the precoding matrix may be different. Therefore, in order to flexibly configure codebooks (including the first codebook) for different terminal devices, different above parameters may be configured for different terminal devices. Correspondingly, the terminal device can determine the codebook based on the corresponding parameters. Of course, in order to simplify the complexity of configuring the codebook, different terminal devices may also correspond to the same parameters, or in other words, different terminal devices determine the first codebook based on the same first information.

In addition, when terminal devices communicate based on different ranks, the channel quality will also be different. Therefore, codebooks (including the above-mentioned first codebook) corresponding to different ranks also have differences. Therefore, in order to indicate codebooks corresponding to different ranks, different ranks may correspond to different parameters. For example, different ranks may correspond to different numbers of first DFT vectors. In some implementation manners, the foregoing first information may include multiple different parameters, and different parameters correspond to different ranks. In this way, different codebooks are determined based on different parameters, so that different ranks correspond to different codebooks. For example, the first information may include multiple different numbers of first DFT vectors, and different numbers of first DFT vectors may correspond to different ranks. In this way, multiple codebooks can be determined based on different numbers of first DFT vectors, and different codebooks in the multiple codebooks can correspond to different ranks.

In some other implementation manners, the above-mentioned different parameters may also correspond to different rank sets. In this way, the codebooks determined based on different parameters are different, so that different rank sets correspond to different codebooks, wherein the rank set includes one or multiple ranks. For example, rank set 1 includes ranks 1 and 2, and rank set 2 includes ranks 3 and 4, where rank set 1 corresponds to the number of phases between polarization directions 4, and rank set 2 corresponds to the number of phases between polarization directions 2. Correspondingly, the codebook corresponding to rank set 1 is determined based on the number 4 of phases between polarization directions, and the codebook corresponding to rank set 2 is determined based on the number 2 of phases between polarization directions.

Of course, in this embodiment of the present application, in order to simplify the complexity of configuring the codebook, in some implementations, different ranks can also correspond to the same parameters, or in other words, the codebooks corresponding to different ranks can be based on the same first information to determine. In other implementation manners, different rank sets may also correspond to the same parameter, or in other words, codebooks corresponding to different rank sets may be determined based on the same first information.

The above mainly introduces the method for determining the size of the TPMI indication field in the DCI, and the following describes the method for the terminal device to determine the precoding matrix based on the first TPMI in the TPMI indication field after receiving the DCI. That is, if the first TPMI is used to indicate the index of the target DFT vector in the first codebook and the phase between the target polarization directions, the above step S860 includes: the terminal device, according to the index of the target DFT vector and the phase between the target polarization directions, from The precoding matrix of the uplink data is determined in the first codebook.

In different situations, the first TPMI indication information may be different. For example, in the scenario of multi-layer transmission, the first TPMI may also indicate the index of the target DFT vector, the phase between target polarization directions, and the DFT vector offset between different transmission layers. For another example, the first TPMI may include three pieces of information: the indication information of the DFT vector in the horizontal dimension, the indication information of the DFT vector in the vertical dimension, and the indication information of the phase between polarization directions. For another example, the above-mentioned first TPMI may include four pieces of information: the indication information of the DFT vector in the horizontal dimension, the indication information of the DFT vector in the vertical dimension, the indication information of the DFT vector offset between transmission layers, and the indication of the phase between polarization directions information. Wherein, the indication information of the DFT vector offset between transmission layers may be used to determine a currently used DFT vector offset from the multiple DFT vector offsets between transmission layers indicated by the first information.

For ease of understanding, the following takes the index of the first TPMI indicating the horizontal dimension DFT vector, the vertical dimension DFT vector and the phase between polarization directions as an example, and introduces how the first TPMI indicates the precoding matrix.

Assuming that the index of the horizontal dimension DFT vector indicated by the first TPMI is l, the index of the vertical dimension DFT vector is m, and the index of the phase between polarization directions is n, then the precoding matrix in the first codebook corresponding to different ranks can be Indicates the following situations.

If Rank=1, the precoding matrix in the first codebook can be expressed as:

其中，l’＝l+k ₁，m’＝m+k ₂，且k ₁和k ₂为传输层间的DFT向量偏移。 If Rank=2, the precoding matrix in the first codebook can be expressed as:

Wherein, l'=l+k ₁ , m'=m+k ₂ , and k ₁ and k ₂ are DFT vector offsets between transmission layers.

It should be noted that k ₁ and k ₂ may be DFT vector offsets between transmission layers indicated by the network device through high-layer signaling, where the high-layer signaling may be the first information. Certainly, k ₁ and k ₂ may be offsets of DFT vectors between transmission layers indicated by the first TPMI.

其中l’＝l+k ₁,m’＝m+k ₂，且k ₁和k ₂为传输层间的DFT向量偏移。 If Rank=3, the precoding matrix in the first codebook can be expressed as:

Where l'=l+k ₁ , m'=m+k ₂ , and k ₁ and k ₂ are DFT vector offsets between transmission layers.

It should be noted that k ₁ and k ₂ may be DFT vector offsets between transmission layers indicated by the network device through high-layer signaling, where the high-layer signaling may be the first information. Certainly, k ₁ and k ₂ may be offsets of DFT vectors between transmission layers indicated by the first TPMI.

且l’＝l+k ₁,m’＝m+k ₂，且

其中，第一水平维天线端口的数量N ₁以及第一垂直维天线端口的数量N ₂决定了第一码本中每个码字(或者预编码举矩阵)的行数。 If Rank=4,

and l'=l+k ₁ , m'=m+k ₂ , and

The number _N1 of antenna ports in the first horizontal dimension and the number _N2 of antenna ports in the first vertical dimension determine the number of rows of each codeword (or precoding matrix) in the first codebook.

The method embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 8 , and the device embodiment of the present application is described in detail below in conjunction with FIG. 9 to FIG. 11 . It should be understood that the descriptions of the method embodiments correspond to the descriptions of the device embodiments, therefore, for parts not described in detail, reference may be made to the foregoing method embodiments.

FIG. 9 is a schematic diagram of a terminal device according to an embodiment of the present application. The terminal device 900 shown in FIG. 9 includes a processing unit 910 .

The processing unit 910 is configured to determine the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, and the DCI is used to schedule uplink data to be transmitted;

The processing unit 910 is further configured to acquire the first TPMI from the TPMI indication field in the DCI according to the size of the TPMI indication field and the length of the DCI;

The processing unit 910 is further configured to determine a precoding matrix of the uplink data from a first codebook according to the first TPMI, wherein the first information includes at least one of the following parameters: the first Number of antenna ports in the horizontal dimension, number of antenna ports in the first vertical dimension, uplink RI constraints, codebook subset constraints, the number of first DFT vectors in the first codebook, the number of phases between the first polarization directions, transmission The offset of the DFT vector between layers, the quantity of the offset of the DFT vector between transmission layers, the antenna array dimension information of the terminal device, and the number of beams supported by the terminal device.

In a possible implementation manner, the processing unit is further configured to: determine the size of the TPMI indication field according to the first information; determine the length of the DCI according to the size of the TPMI indication field.

In a possible implementation, if the first information includes the number of the first DFT vectors, the number of the first DFT vectors includes the number _L1 of the first horizontal dimension DFT vectors and the first vertical dimension DFT The number of vectors L ₂ , and the number of DFT vectors in the first horizontal dimension L ₁ =N ₁ O ₁ , the number of DFT vectors in the second vertical dimension L ₂ =N ₂ O ₂ , where N ₁ represents the second The number of antenna ports in the horizontal dimension, O ₁ represents the sampling coefficient of the first horizontal dimension, N ₂ represents the number of antenna ports in the second vertical dimension, and O ₂ represents the sampling coefficient of the first vertical dimension.

In a possible implementation manner, if the first information includes the number of antenna ports in the first horizontal dimension and the number of antenna ports in the first vertical dimension, the processing unit is further configured to: according to the first The number of antenna ports in the horizontal dimension and the number of antenna ports in the first vertical dimension determine the number of second DFT vectors in the first codebook; determine the size of the TPMI indication field according to the number of the second DFT vectors .

In a possible implementation manner, the number of the second DFT vectors includes the number L ₃ of the second horizontal dimension DFT vectors and the number L ₄ of the second vertical dimension DFT vectors, and the number of the second horizontal dimension DFT vectors Quantity L ₃ =N ₁ O ₃ , the quantity of DFT vectors in the second vertical dimension L ₄ =N ₂ O ₄ , wherein, N ₁ represents the number of antenna ports in the first horizontal dimension, and O ₃ represents sampling in the second horizontal dimension coefficient, N ₂ represents the number of antenna ports in the first vertical dimension, and O ₄ represents the sampling coefficient in the second vertical dimension.

In a possible implementation manner, if the first information includes the uplink RI constraint, the uplink RI constraint is used to indicate a rank that can be indicated in the DCI, and the value of the rank is used to determine the DCI The TPMI that can be indicated in.

In a possible implementation manner, if the first information includes the uplink RI constraint, the processing unit is further configured to: determine the first code according to the rank value indicated by the uplink RI constraint The number of available TPMIs in this document; according to the number of available TPMIs, determine the size of the TPMI indication field.

In a possible implementation manner, if the first information includes the codebook subset constraint, the codebook subset constraint is used to indicate the available DFT vectors in the first codebook, and the first The inter-polarization phase available in the codebook and one or more parameters in the codewords available in the first codebook.

In a possible implementation manner, if the first information includes the number of the first DFT vectors, the processing unit is further configured to: according to the number of the first DFT vectors and the second polarization direction The number of phases determines the size of the first codebook; and determines the size of the TPMI indication field according to the size of the first codebook.

In a possible implementation manner, if the first information includes the phase number between the first polarization directions, the number of phases between the second polarization directions is the phase number between the first polarization directions or, the number of phases between the second polarization directions is predetermined.

根据所述DFT向量指示信息的比特数，确定所述TPMI指示域的大小。 In a possible implementation manner, if the first information includes the number L of the first DFT vectors, the processing unit is further configured to: determine the TPMI according to the number L of the first DFT vectors The number of bits of the DFT vector indication information included in the indication field is

The size of the TPMI indication field is determined according to the number of bits of the DFT vector indication information.

In a possible implementation manner, if the first information includes the number of phases between the first polarization directions, the processing unit is further configured to: according to the number of phases between the first polarization directions and The quantity of the third DFT vector determines the size of the first codebook; and determines the size of the TPMI indication field according to the size of the first codebook.

In a possible implementation manner, if the first information includes the number of the first DFT vectors, the number of the third DFT vectors is the number of the first DFT vectors; or the third DFT The number of vectors is pre-agreed.

根据所述极化方向间相位指示信息的比特数，确定所述TPMI指示域的大小。 In a possible implementation manner, if the first information includes the phase quantity K between the first polarization directions, the processing unit is further configured to: according to the quantity K of the phases between the first polarization directions K, determining the number of bits of the phase indication information between polarization directions included in the TPMI indication field is

The size of the TPMI indication field is determined according to the number of bits of the inter-polarization phase indication information.

In a possible implementation, the value of the phase between the first polarization directions is [1, q], where q represents the size of a BPSK element, or, q represents the size of a QPSK element, or, q represents 8PSK element size.

In a possible implementation manner, the inter-transmission layer DFT vector offset represents an offset between the index of the DFT vector corresponding to the first transmission layer and the index of the DFT vector corresponding to the second transmission layer.

In a possible implementation manner, if the first information includes the number R of the DFT vector offset between the transmission layers, the TPMI indication field is used to indicate the DFT vector between the transmission layers The number of bits occupied by the offset indication information is expressed as

In a possible implementation manner, the first information includes multiple parameters, and different parameters correspond to different ranks, or different parameters correspond to different rank sets; or the first information Included parameters are used for all ranks.

In a possible implementation manner, the antenna array dimension information includes the number of horizontal-dimension antenna ports supported by the terminal device and the number of vertical-dimension antenna ports supported by the terminal device, or, the antenna array dimension information indicates the Describe the arrangement of the antenna array of the terminal device.

In a possible implementation manner, the arrangement manner of the antenna array of the terminal device includes a horizontal arrangement, a horizontal and vertical two-dimensional arrangement, or a four-sided arrangement.

In a possible implementation manner, the number of beams supported by the terminal device includes the number of horizontal beams supported by the terminal device and/or the number of vertical beams supported by the terminal device.

In a possible implementation manner, the first information is indicated by a network device through high-level signaling, or the first information is carried in terminal capability information of the terminal device.

In a possible implementation manner, if the DCI is coded jointly by rank indication RI and TPMI, the TPMI information indication field also carries the first RI.

In a possible implementation manner, the first TPMI is used to indicate an index of a target DFT vector in the first codebook and a target inter-polarization phase, and the processing unit is further configured to: according to the The index of the target DFT vector and the phase between the target polarization directions are used to determine the precoding matrix of the uplink data from the first codebook.

In a possible implementation manner, the first codebook is determined by the terminal device according to the first information.

In a possible implementation manner, the processing unit is further configured to: determine the DFT vector in the first codebook and/or the inter-polarization phase in the first codebook according to the first information ; generating the first codebook according to the DFT vector in the first codebook and/or the inter-polarization phase in the first codebook.

FIG. 10 is a schematic diagram of a network device according to an embodiment of the present application. The network device 1000 shown in FIG. 10 includes: a processing unit 1010 and a sending unit 1020 .

The processing unit 1010 is configured to determine the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, the DCI is used to schedule uplink data to be transmitted by the terminal device, and the TPMI indication field is used to carry the first TPMI, the first TPMI is used to indicate the precoding matrix of the uplink data from the first codebook;

The processing unit 1010 is further configured to generate the DCI according to the size of the TPMI indication field and the length of the DCI, wherein the first information includes at least one of the following parameters: a first horizontal dimension antenna Number of ports, number of antenna ports in the first vertical dimension, uplink RI constraints, codebook subset constraints, the number of first DFT vectors in the first codebook, the number of phases between first polarization directions, and the number of phases between transmission layers The offset of the DFT vector, the amount of the offset of the DFT vector between transmission layers, the antenna array dimension information of the terminal device, and the number of beams supported by the terminal device.

The sending unit 1020 is configured to send the DCI to the terminal device.

In a possible implementation manner, the sending unit is configured to send the first information to the terminal device.

In a possible implementation manner, the network device further includes: a first receiving unit, configured to receive the SRS sent by the terminal device; the processing unit, configured to obtain channel information according to the SRS; and The channel information determines the first information.

In a possible implementation manner, the network device further includes: a second receiving unit, configured to receive terminal capability information of the terminal device; the processing unit, configured to determine, according to the terminal capability information, the The first information, the terminal capability information includes antenna array dimension information of the terminal device and the number of beams supported by the terminal device.

In a possible implementation manner, the processing unit is configured to: determine the size of the TPMI indication field according to the first information; determine the length of the DCI according to the size of the TPMI indication field.

In a possible implementation, if the first information includes the number of the first DFT vectors, the number of the first DFT vectors includes the number _L1 of the first horizontal dimension DFT vectors and the first vertical dimension DFT The number of vectors L ₂ , and the number of DFT vectors in the first horizontal dimension L ₁ =N ₁ O ₁ , the number of DFT vectors in the second vertical dimension L ₂ =N ₂ O ₂ , where N ₁ represents the second The number of antenna ports in the horizontal dimension, O ₁ represents the sampling coefficient of the first horizontal dimension, N ₂ represents the number of antenna ports in the second vertical dimension, and O ₂ represents the sampling coefficient of the first vertical dimension.

In a possible implementation manner, if the first information includes the number of antenna ports in the first horizontal dimension and the number of antenna ports in the first vertical dimension, the processing unit is configured to: The number of dimensional antenna ports and the number of antenna ports in the first vertical dimension determine the number of second DFT vectors in the first codebook; determine the size of the TPMI indication field according to the number of second DFT vectors.

In a possible implementation manner, the number of the second DFT vectors includes the number L ₃ of the second horizontal dimension DFT vectors and the number L ₄ of the second vertical dimension DFT vectors, and the number of the second horizontal dimension DFT vectors Quantity L ₃ =N ₁ O ₃ , the quantity L ₄ =N ₂ O ₄ of the second vertical dimension DFT vector, wherein, N ₁ represents the number of antenna ports in the first horizontal dimension, O ₃ represents the sampling coefficient in the second horizontal dimension, N ₂ represents the number of antenna ports in the first vertical dimension, and O ₄ represents the sampling coefficient in the second vertical dimension.

In a possible implementation manner, the uplink RI constraint is used to indicate the rank that can be indicated in the DCI, and the value of the rank is used to determine the TPMI that can be indicated in the DCI.

In a possible implementation manner, if the first information includes the uplink RI constraint, the processing unit is configured to: determine the rank in the first codebook according to the rank available in the first codebook The number of available TPMIs; according to the number of available TPMIs in the first codebook, determine the size of the TPMI indication field.

In a possible implementation manner, the codebook subset constraint is used to indicate the DFT vectors available in the first codebook, the inter-polarization phases available in the first codebook, and the first One or more parameters in the codewords available in the codebook.

In a possible implementation manner, if the first information includes the number of the first DFT vectors, the processing unit is configured to: according to the number of the first DFT vectors and the phase between the second polarization directions Determine the size of the first codebook; determine the size of the TPMI indication field according to the size of the first codebook.

In a possible implementation manner, if the first information includes the phase number between the first polarization directions, the number of phases between the second polarization directions is the phase number between the first polarization directions or, the number of phases between the second polarization directions is predetermined.

根据所述DFT向量指示信息的比特数，确定所述TPMI指示域的大小。 In a possible implementation manner, if the first information includes the number L of the first DFT vectors, the processing unit is configured to: determine the TPMI indication according to the number L of the first DFT vectors The number of bits of the DFT vector indication information included in the field is

The size of the TPMI indication field is determined according to the number of bits of the DFT vector indication information.

In a possible implementation manner, if the first information includes the number K of phases between the first polarization directions, the processing unit is configured to: according to the number K of phases between the first polarization directions , determine that the number of bits of the phase indication information between polarization directions included in the TPMI indication field is

确定所述TPMI指示域的大小。 According to the number of bits of the phase indication information between the polarization directions

Determine the size of the TPMI indication field.

In a possible implementation manner, if the first information includes the first inter-polarization phase quantity K, the processing unit is configured to: according to the first inter-polarization phase quantity and the first Three DFT vector numbers, determine the size of the first codebook; determine the size of the TPMI indication field according to the size of the first codebook.

In a possible implementation manner, if the first information includes the number of the first DFT vectors, the number of the third DFT vectors is the number of the first DFT vectors; or the third DFT The number of vectors is pre-agreed.

In a possible implementation, the value of the phase between the first polarization directions is [1, q], where q represents the size of a BPSK element, or, q represents the size of a QPSK element, or, q represents 8PSK element size.

In a possible implementation manner, the inter-transmission layer DFT vector offset represents an offset between the index of the DFT vector corresponding to the first transmission layer and the index of the DFT vector corresponding to the second transmission layer.

In a possible implementation manner, if the first information includes the number R of the DFT vector offset between the transmission layers, the TPMI indication field is used to indicate the DFT vector between the transmission layers The number of bits occupied by the offset indication information is expressed as

In a possible implementation manner, the first information includes multiple parameters, and different parameters correspond to different ranks, or different parameters correspond to different rank sets; or the first information Included parameters are used for all ranks.

In a possible implementation manner, the antenna array dimension information includes the number of horizontal-dimension antenna ports supported by the terminal device and the number of vertical-dimension antenna ports supported by the terminal device, or, the antenna array dimension information indicates the Describe the arrangement of the antenna array of the terminal device.

In a possible implementation manner, the arrangement manner of the antenna array of the terminal device includes a horizontal arrangement, a horizontal and vertical two-dimensional arrangement, or a four-sided arrangement.

In a possible implementation manner, the number of beams supported by the terminal device includes the number of horizontal beams supported by the terminal device and/or the number of vertical beams supported by the terminal device.

In a possible implementation manner, if the DCI is coded jointly by rank indication RI and TPMI, the TPMI information indication field also carries the first RI.

In a possible implementation manner, the first codebook is determined according to the first information.

In a possible implementation manner, the first information is used to determine an index of a target DFT vector and/or a target inter-polarization phase in the first codebook.

Fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application. The dashed line in Figure 11 indicates that the unit or module is optional. The apparatus 1100 may be used to implement the methods described in the foregoing method embodiments. Apparatus 1100 may be a chip, a terminal device or a network device.

Apparatus 1100 may include one or more processors 1110 . The processor 1110 can support the device 1100 to implement the methods described in the foregoing method embodiments. The processor 1110 may be a general purpose processor or a special purpose processor. For example, the processor may be a central processing unit (central processing unit, CPU). Alternatively, the processor can also be other general-purpose processors, digital signal processors (digital signal processors, DSPs), application specific integrated circuits (application specific integrated circuits, ASICs), off-the-shelf programmable gate arrays (field programmable gate arrays, FPGAs) Or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

Apparatus 1100 may also include one or more memories 1120 . A program is stored in the memory 1120, and the program can be executed by the processor 1110, so that the processor 1110 executes the methods described in the foregoing method embodiments. The memory 1120 may be independent from the processor 1110 or may be integrated in the processor 1110 .

Apparatus 1100 may also include a transceiver 1130 . The processor 1110 can communicate with other devices or chips through the transceiver 1130 . For example, the processor 1110 may send and receive data with other devices or chips through the transceiver 1130 .

The embodiment of the present application also provides a computer-readable storage medium for storing programs. The computer-readable storage medium can be applied to the terminal or the network device provided in the embodiments of the present application, and the program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.

The embodiment of the present application also provides a computer program product. The computer program product includes programs. The computer program product can be applied to the terminal or the network device provided in the embodiments of the present application, and the program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.

The embodiment of the present application also provides a computer program. The computer program can be applied to the terminal or the network device provided in the embodiments of the present application, and the computer program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.

It should be understood that, in the embodiment of the present application, the value range corresponding to the letter representing the quantity may be a natural number. For example, the value range of the number N ₁ of antenna ports in the first horizontal dimension is a natural number. For another example, the value range of the number _N2 of antenna ports in the first horizontal dimension is a natural number. For another example, the value range of the quantity L ₁ of the first horizontal dimension DFT vector is a natural number. For another example, the value range of the quantity L ₂ of the first vertical dimension DFT vector is a natural number. For another example, the value range of the quantity L of the first DFT vector is a natural number. For another example, the value range of the quantity K of phases between the first polarization directions is a natural number. For another example, the value range of the offset quantity R of the DFT vector between transmission layers is a natural number.

Additionally, the terms "system" and "network" may be used interchangeably in this application. In addition, the terms used in the application are only used to explain the specific embodiments of the application, and are not intended to limit the application. The terms "first", "second", "third" and "fourth" in the specification and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order . Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present application, the "indication" mentioned may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.

In this embodiment of the application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.

In this embodiment of the application, the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is instructed, configures and is configured, etc. relation.

In this embodiment of the application, "predefined" or "preconfigured" can be realized by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices). The application does not limit its specific implementation. For example, pre-defined may refer to defined in the protocol.

In the embodiment of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, may include the LTE protocol, the NR protocol, and related protocols applied to future communication systems, which is not limited in the present application.

The term "and/or" in the embodiment of the present application is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and/or B, which can mean: A exists alone, and A and B exist at the same time , there are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

In various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic, rather than the implementation process of the embodiments of the present application. constitute any limitation.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be read by a computer, or a data storage device including a server, a data center, and the like integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital versatile disc (digital video disc, DVD)) or a semiconductor medium (for example, a solid state disk (solid state disk, SSD) )wait.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims (118)

A communication method, characterized in that, comprising: The terminal device determines the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, and the DCI is used to schedule uplink data to be transmitted; The terminal device acquires the first TPMI from the TPMI indication field in the DCI according to the size of the TPMI indication field and the length of the DCI; determining, by the terminal device, a precoding matrix of the uplink data from a first codebook according to the first TPMI, Wherein, the first information includes at least one of the following parameters: the number of antenna ports in the first horizontal dimension, the number of antenna ports in the first vertical dimension, uplink RI constraints, codebook subset constraints, and The number of first DFT vectors, the number of phases between first polarization directions, the offset of DFT vectors between transmission layers, the number of offsets of DFT vectors between transmission layers, the antenna array dimension information of the terminal device, and the The number of beams supported by the terminal device. The method according to claim 1, wherein the terminal device determines the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, including: The terminal device determines the size of the TPMI indication field according to the first information; The terminal device determines the length of the DCI according to the size of the TPMI indication field. The method according to claim 1 or 2, wherein if the first information comprises the quantity of the first DFT vector, the quantity of the first DFT vector comprises the quantity _L of the first horizontal dimension DFT vector And the number L ₂ of the first vertical dimension DFT vectors, and the number L ₁ =N ₁ O ₁ of the first horizontal dimension DFT vectors, the number L ₂ =N ₂ O ₂ of the second vertical dimension DFT vectors, where , N ₁ represents the number of antenna ports in the second horizontal dimension, O ₁ represents the sampling coefficient of the first horizontal dimension, N ₂ represents the number of antenna ports in the second vertical dimension, and O ₂ represents the sampling coefficient of the first vertical dimension. The method according to claim 2, wherein if the first information includes the number of antenna ports in the first horizontal dimension and the number of antenna ports in the first vertical dimension, The terminal device determines the size of the TPMI indication field according to the first information, including: The terminal device determines the number of second DFT vectors in the first codebook according to the number of antenna ports in the first horizontal dimension and the number of antenna ports in the first vertical dimension; The terminal device determines the size of the TPMI indication field according to the number of the second DFT vectors. The method according to claim 4, wherein the number of the second DFT vectors comprises the number L ₃ of the second horizontal dimension DFT vectors and the number L ₄ of the second vertical dimension DFT vectors, and the second horizontal dimension The number of DFT vectors in the first dimension L ₃ =N ₁ O ₃ , the number of DFT vectors in the second vertical dimension L ₄ =N ₂ O ₄ , where N ₁ represents the number of antenna ports in the first horizontal dimension, and O ₃ represents the number of antenna ports in the first horizontal dimension. Two horizontal dimension sampling coefficients, N ₂ represents the number of antenna ports in the first vertical dimension, O ₄ represents the second vertical dimension sampling coefficient. The method according to claim 2, wherein if the first information includes the uplink RI constraint, the uplink RI constraint is used to indicate the rank that can be indicated in the DCI, and the value of the rank is used for Determine the TPMI that can be indicated in the DCI. The method according to claim 6, wherein if the first information includes the uplink RI constraint, the terminal device determines the size of the TPMI indication field according to the first information, including: The terminal device determines the number of TPMIs available in the first codebook according to the rank value indicated by the uplink RI constraint; The terminal device determines the size of the TPMI indication field according to the number of available TPMIs. The method according to claim 1 or 2, wherein if the first information includes the codebook subset constraint, the codebook subset constraint is used to indicate the available DFT in the first codebook vector, the inter-polarization phase available in the first codebook, and one or more parameters in the codewords available in the first codebook. The method according to claim 2 or 3, wherein if the first information includes the number of the first DFT vectors, the terminal device determines the size of the TPMI indication field according to the first information ,include: The terminal device determines the size of the first codebook according to the number of the first DFT vectors and the number of phases between the second polarization directions; The terminal device determines the size of the TPMI indication field according to the size of the first codebook. The method according to claim 8, wherein if the first information includes the number of phases between the first polarization directions, the number of phases between the second polarization directions is The number of phases between orientations; Or, the number of phases between the second polarization directions is predetermined. The method according to claim 2 or 3, wherein if the first information includes the number L of the first DFT vector, the terminal device determines the value of the TPMI indication field according to the first information size, including: According to the number L of the first DFT vectors, the terminal device determines that the number of bits of the DFT vector indication information included in the TPMI indication field is

The terminal device determines the size of the TPMI indication field according to the number of bits of the DFT vector indication information. The method according to claim 2, wherein if the first information includes the number of phases between the first polarization directions, the terminal device determines the TPMI indication field according to the first information size, including: The terminal device determines the size of the first codebook according to the number of phases between the first polarization directions and the number of third DFT vectors; The terminal device determines the size of the TPMI indication field according to the size of the first codebook. The method of claim 12, wherein if the first information includes the number of the first DFT vectors, the number of the third DFT vectors is the number of the first DFT vectors; or The number of the third DFT vectors is pre-agreed. The method according to claim 2, wherein if the first information includes the quantity K of phases between the first polarization directions, the terminal device determines the TPMI indication field according to the first information size, including: According to the quantity K of the first inter-polarization phase, the terminal device determines that the number of bits of the inter-polarization phase indication information included in the TPMI indication field is

The terminal device determines the size of the TPMI indication field according to the number of bits of the inter-polarization phase indication information. The method according to any one of claims 1-2, 14, wherein the value of the phase between the first polarization directions is [1, q], where q represents the size of the BPSK element, or , q represents the size of the QPSK element, or, q represents the size of the 8PSK element. The method according to any one of claims 1-15, wherein the offset of the DFT vector between the transmission layers represents the index of the DFT vector corresponding to the first transmission layer and the DFT vector corresponding to the second transmission layer The offset between the indices. The method according to any one of claims 1-2, 16, wherein if the first information includes the amount R of the offset of the DFT vector between the transmission layers, then in the TPMI indication field The number of bits occupied by the indication information used to indicate the offset of the DFT vector between the transmission layers is expressed as

The method according to any one of claims 1-17, wherein the first information includes a plurality of the parameters, and different parameters correspond to different ranks, or different parameters correspond to different ranks. rank set; or the parameters included in the first information are used for all ranks. The method according to any one of claims 1-18, wherein the antenna array dimension information includes the number of horizontal dimension antenna ports supported by the terminal device and the number of vertical dimension antenna ports supported by the terminal device, or, The antenna array dimension information indicates an arrangement manner of the antenna array of the terminal device. The method according to claim 19, wherein the arrangement of the antenna array of the terminal device includes a horizontal arrangement, a horizontal and vertical two-dimensional arrangement or a four-sided arrangement. The method according to any one of claims 1-20, wherein the number of beams supported by the terminal device includes the number of horizontal beams supported by the terminal device and/or the number of vertical beams supported by the terminal device quantity. The method according to any one of claims 1-21, wherein the first information is indicated by a network device through high-layer signaling, or the first information is carried in the terminal capability information of the terminal device middle. The method according to any one of claims 1-22, wherein if the DCI is coded jointly with rank indication RI and TPMI, the TPMI information indication field also carries the first RI. The method according to any one of claims 1-23, wherein the first TPMI is used to indicate the index of the target DFT vector in the first codebook and the phase between target polarization directions, The terminal device determines the precoding matrix of the uplink data from the first codebook according to the first TPMI, including: The terminal device determines the precoding matrix of the uplink data from the first codebook according to the target DFT vector index and the target inter-polarization phase. The method according to any one of claims 1-24, wherein the first codebook is determined by the terminal device according to the first information. The method according to claim 25, further comprising: The terminal device determines a DFT vector in the first codebook and/or an inter-polarization phase in the first codebook according to the first information; The terminal device generates the first codebook according to the DFT vector in the first codebook and/or the inter-polarization phase in the first codebook. A communication method, characterized in that, comprising: The network device determines the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, the DCI is used to schedule the uplink data to be transmitted by the terminal device, the TPMI indication field is used to bear the first TPMI, the The first TPMI is used to indicate the precoding matrix of the uplink data from the first codebook; The network device generates the DCI according to the size of the TPMI indication field and the length of the DCI: the network device sends the DCI to the terminal device, Wherein, the first information includes at least one of the following parameters: the number of antenna ports in the first horizontal dimension, the number of antenna ports in the first vertical dimension, uplink RI constraints, codebook subset constraints, and The number of first DFT vectors, the number of phases between first polarization directions, the offset of DFT vectors between transmission layers, the number of offsets of DFT vectors between transmission layers, the antenna array dimension information of the terminal device, and the The number of beams supported by the terminal device. The method of claim 27, further comprising: The network device sends the first information to the terminal device. The method according to claim 27 or 28, further comprising: The network device receives the SRS sent by the terminal device; The network device obtains channel information according to the SRS; The network device determines the first information according to the channel information. The method of claim 27, further comprising: The network device receives terminal capability information of the terminal device; The network device determines according to the first information according to the terminal capability information, where the terminal capability information includes antenna array dimension information of the terminal device and the number of beams supported by the terminal device. The method according to any one of claims 27-30, wherein the network device determines the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, including: The network device determines the size of the TPMI indication field according to the first information; The network device determines the length of the DCI according to the size of the TPMI indication field. The method according to any one of claims 27-31, wherein if the first information includes the number of the first DFT vectors, the number of the first DFT vectors includes the first horizontal dimension DFT vector The number L ₁ of the first vertical dimension DFT vector and the number L ₂ of the first vertical dimension DFT vector, and the number L ₁ of the first horizontal dimension DFT vector = N ₁ O ₁ , the number L ₂ of the second vertical dimension DFT vector = N ₂ O ₂ , where N ₁ represents the number of antenna ports in the second horizontal dimension, O ₁ represents the sampling coefficient in the first horizontal dimension, N ₂ represents the number of antenna ports in the second vertical dimension, and O ₂ represents the sampling coefficient in the first vertical dimension. The method according to claim 31, wherein if the first information includes the number of antenna ports in the first horizontal dimension and the number of antenna ports in the first vertical dimension, The network device determines the size of the TPMI indication field according to the first information, including: The network device determines the number of second DFT vectors in the first codebook according to the number of antenna ports in the first horizontal dimension and the number of antenna ports in the first vertical dimension; The network device determines the size of the TPMI indication field according to the number of the second DFT vectors. The method according to claim 33, wherein the number of the second DFT vectors comprises the number L ₃ of the second horizontal dimension DFT vectors and the number L ₄ of the second vertical dimension DFT vectors, and the second horizontal dimension The number of DFT vectors in the first dimension L ₃ =N ₁ O ₃ , the number of DFT vectors in the second vertical dimension L ₄ =N ₂ O ₄ , where N ₁ represents the number of antenna ports in the first horizontal dimension, and O ₃ represents the number of antenna ports in the first horizontal dimension. Two horizontal dimension sampling coefficients, N ₂ represents the number of antenna ports in the first vertical dimension, O ₄ represents the second vertical dimension sampling coefficient. The method according to any one of claims 31, wherein the uplink RI constraint is used to indicate the rank that can be indicated in the DCI, and the value of the rank is used to determine the TPMI that can be indicated in the DCI . The method according to claim 35, wherein if the first information includes the uplink RI constraint, the network device determines the size of the TPMI indication field according to the first information, including: The network device determines the number of TPMIs available in the first codebook according to the ranks available in the first codebook; The network device determines the size of the TPMI indication field according to the number of available TPMIs in the first codebook. The method according to any one of claims 27-31, wherein the codebook subset constraint is used to indicate the DFT vectors available in the first codebook, and the available DFT vectors in the first codebook The inter-polarization phase and one or more parameters in the codewords available in the first codebook. The method according to any one of claims 27-31, wherein if the first information includes the number of the first DFT vectors, the network device determines the TPMI indication according to the first information The size of the domain, including: The network device determines the size of the first codebook according to the number of the first DFT vectors and the number of phases between the second polarization directions; The network device determines the size of the TPMI indication field according to the size of the first codebook. The method of claim 38, wherein if the first information includes the number of phases between the first polarization directions, the number of phases between the second polarization directions is The number of phases between orientations; Or, the number of phases between the second polarization directions is predetermined. The method according to claim 31, wherein if the first information includes the number L of the first DFT vector, the network device determines the size of the TPMI indication field according to the first information, including : According to the number L of the first DFT vectors, the network device determines that the number of bits of the DFT vector indication information included in the TPMI indication field is

The network device determines the size of the TPMI indication field according to the bit number of the DFT vector indication information. The method according to claim 31, wherein if the first information includes the quantity K of the phase between the first polarization directions, the network device determines the TPMI indication field according to the first information size, including: The network device determines the number of bits of the inter-polarization phase indication information included in the TPMI indication field according to the quantity K of the phase between the first polarization directions as

The number of bits indicated by the network device according to the phase indication information between polarization directions

Determine the size of the TPMI indication field. The method according to claim 31, wherein if the first information includes the phase quantity K between the first polarization directions, the network device determines the TPMI indication field according to the first information size, including: The network device determines the size of the first codebook according to the number of phases between the first polarization directions and the number of third DFT vectors; The network device determines the size of the TPMI indication field according to the size of the first codebook. The method of claim 42, wherein if the first information includes the number of the first DFT vectors, the number of the third DFT vectors is the number of the first DFT vectors; or The number of the third DFT vectors is pre-agreed. The method according to any one of claims 27-31, wherein the value of the phase between the first polarization directions is [1, q], where q represents the size of the BPSK element, or, q Indicates the size of a QPSK element, or, q indicates the size of an 8PSK element. The method according to any one of claims 27-44, wherein the offset of the DFT vector between the transmission layers represents the index of the DFT vector corresponding to the first transmission layer and the DFT vector corresponding to the second transmission layer The offset between the indices. The method according to any one of claims 27-31, wherein if the first information includes the amount R of the offset of the DFT vector between the transmission layers, the TPMI indication field is used for The number of bits occupied by the indication information indicating the offset of the DFT vector between the transmission layers is expressed as

The method according to any one of claims 27-46, wherein the first information includes a plurality of parameters, and different parameters correspond to different ranks, or different parameters correspond to different ranks. rank set; or the parameters included in the first information are used for all ranks. The method according to any one of claims 27-47, wherein the antenna array dimension information includes the number of antenna ports in the horizontal dimension supported by the terminal device and the number of antenna ports in the vertical dimension supported by the terminal device, or, The antenna array dimension information indicates an arrangement manner of the antenna array of the terminal device. The method according to claim 44, wherein the arrangement of the antenna array of the terminal device includes a horizontal arrangement, a horizontal and vertical two-dimensional arrangement or a four-sided arrangement. The method according to any one of claims 27-48, wherein the number of beams supported by the terminal device includes the number of horizontal beams supported by the terminal device and/or the number of vertical beams supported by the terminal device quantity. The method according to any one of claims 27-50, wherein if the DCI is coded jointly with rank indication RI and TPMI, the TPMI information indication field also carries the first RI. The method according to any one of claims 27-51, wherein the first codebook is determined according to the first information. The method according to any one of claims 27-52, wherein the first information is used to determine an index of a target DFT vector in the first codebook and/or a phase between target polarization directions. A terminal device, characterized in that it includes: A processing unit, configured to determine the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, and the DCI is used to schedule uplink data to be transmitted; The processing unit is further configured to acquire the first TPMI from the TPMI indication field in the DCI according to the size of the TPMI indication field and the length of the DCI; The processing unit is further configured to determine a precoding matrix of the uplink data from a first codebook according to the first TPMI, Wherein, the first information includes at least one of the following parameters: the number of antenna ports in the first horizontal dimension, the number of antenna ports in the first vertical dimension, uplink RI constraints, codebook subset constraints, and The number of first DFT vectors, the number of phases between first polarization directions, the offset of DFT vectors between transmission layers, the number of offsets of DFT vectors between transmission layers, the antenna array dimension information of the terminal device, and the The number of beams supported by the terminal device. The terminal device according to claim 54, wherein the processing unit is further configured to: Determine the size of the TPMI indication field according to the first information; Determine the length of the DCI according to the size of the TPMI indication field. The terminal device according to claim 54 or 55, wherein if the first information includes the number of the first DFT vectors, the number of the first DFT vectors includes the number L of the first horizontal dimension DFT vectors ₁ and the number of DFT vectors in the first vertical dimension L ₂ , and the number of DFT vectors in the first horizontal dimension L ₁ =N ₁ O ₁ , the number of DFT vectors in the second vertical dimension L ₂ =N ₂ O ₂ , Among them, N ₁ represents the number of antenna ports in the second horizontal dimension, O ₁ represents the sampling coefficient of the first horizontal dimension, N ₂ represents the number of antenna ports in the second vertical dimension, and O ₂ represents the sampling coefficient of the first vertical dimension. The terminal device according to claim 55, wherein if the first information includes the number of antenna ports in the first horizontal dimension and the number of antenna ports in the first vertical dimension, the processing unit is further configured to: determining the number of second DFT vectors in the first codebook according to the number of antenna ports in the first horizontal dimension and the number of antenna ports in the first vertical dimension; Determine the size of the TPMI indication field according to the number of the second DFT vectors. The terminal device according to claim 57, wherein the number of the second DFT vectors includes the number L ₃ of the second horizontal dimension DFT vectors and the number L ₄ of the second vertical dimension DFT vectors, and the second The number of horizontal dimension DFT vectors L ₃ =N ₁ O ₃ , the number of the second vertical dimension DFT vectors L ₄ =N ₂ O ₄ , where N ₁ represents the number of antenna ports in the first horizontal dimension, and O ₃ represents The sampling coefficient of the second horizontal dimension, N ₂ represents the number of antenna ports in the first vertical dimension, and O ₄ represents the sampling coefficient of the second vertical dimension. The terminal device according to claim 56, wherein if the first information includes the uplink RI constraint, the uplink RI constraint is used to indicate the rank that can be indicated in the DCI, and the value of the rank is represented by To determine the TPMI that can be indicated in the DCI. The terminal device according to claim 59, wherein if the first information includes the uplink RI constraint, the processing unit is further configured to: Determine the number of TPMIs available in the first codebook according to the rank value indicated by the uplink RI constraint; Determine the size of the TPMI indication field according to the number of available TPMIs. The terminal device according to claim 54 or 55, wherein if the first information includes the codebook subset constraint, the codebook subset constraint is used to indicate the codebook subset constraints available in the first codebook A DFT vector, an inter-polarization phase available in the first codebook, and one or more parameters in a codeword available in the first codebook. The terminal device according to claim 56 or 57, wherein if the first information includes the number of the first DFT vectors, the processing unit is further configured to: determining the size of the first codebook according to the number of the first DFT vectors and the number of phases between the second polarization directions; Determine the size of the TPMI indication field according to the size of the first codebook. The terminal device according to claim 62, wherein if the first information includes the number of phases between the first polarization directions, the number of phases between the second polarization directions is the first the number of phases between polarization directions; Or, the number of phases between the second polarization directions is predetermined. The terminal device according to claim 56 or 57, wherein if the first information includes the number L of the first DFT vectors, the processing unit is further configured to: According to the quantity L of the first DFT vector, determine that the number of bits of the DFT vector indication information included in the TPMI indication domain is

The size of the TPMI indication field is determined according to the number of bits of the DFT vector indication information. The terminal device according to claim 55, wherein if the first information includes the number of phases between the first polarization directions, the processing unit is further configured to: determining the size of the first codebook according to the number of phases between the first polarization directions and the number of third DFT vectors; Determine the size of the TPMI indication field according to the size of the first codebook. The terminal device according to claim 65, wherein if the first information includes the number of the first DFT vectors, the number of the third DFT vectors is the number of the first DFT vectors; or The number of the third DFT vectors is pre-agreed. The terminal device according to claim 55, wherein if the first information includes the quantity K of phases between the first polarization directions, the processing unit is further configured to: According to the quantity K of the phase between the first polarization directions, determine the number of bits of the phase indication information between the polarization directions included in the TPMI indication field as

The size of the TPMI indication field is determined according to the number of bits of the inter-polarization phase indication information. The terminal device according to any one of claims 54-55, 67, wherein the value of the phase between the first polarization directions is [1, q], where q represents the size of a BPSK element, Or, q represents the size of a QPSK element, or, q represents the size of an 8PSK element. The terminal device according to any one of claims 55-68, wherein the offset of the DFT vector between the transmission layers indicates that the index of the DFT vector corresponding to the first transmission layer and the DFT corresponding to the second transmission layer The offset between the indices of the vector. The terminal device according to any one of claims 54-55, 69, wherein if the first information includes the amount R of the offset of the DFT vector between the transmission layers, the TPMI indication field The number of bits occupied by the indication information used to indicate the offset of the DFT vector between the transmission layers in is expressed as

The terminal device according to any one of claims 55-70, wherein the first information includes multiple parameters, and different parameters correspond to different ranks, or different parameters correspond to Different sets of ranks; or the parameters included in the first information are used for all ranks. The terminal device according to any one of claims 55-71, wherein the antenna array dimension information includes the number of horizontal dimension antenna ports supported by the terminal device and the number of vertical dimension antenna ports supported by the terminal device ,or, The antenna array dimension information indicates an arrangement manner of the antenna array of the terminal device. The terminal device according to claim 72, wherein the arrangement of the antenna array of the terminal device includes a horizontal arrangement, a horizontal and vertical two-dimensional arrangement or a four-sided arrangement. The terminal device according to any one of claims 55-73, wherein the number of beams supported by the terminal device includes the number of horizontal beams supported by the terminal device and/or the number of vertical beams supported by the terminal device Number of beams. The terminal device according to any one of claims 55-74, wherein the first information is indicated by the network device through high-layer signaling, or the first information is carried in the terminal capability of the terminal device information. The terminal device according to any one of claims 55-75, wherein if the DCI is coded jointly with rank indication RI and TPMI, the TPMI information indication field also carries the first RI. The terminal device according to any one of claims 55-76, wherein the first TPMI is used to indicate the index of the target DFT vector in the first codebook and the phase between target polarization directions, so The processing unit described above is also used for: Determine the precoding matrix of the uplink data from the first codebook according to the target DFT vector index and the target inter-polarization phase. The terminal device according to any one of claims 55-77, wherein the first codebook is determined by the terminal device according to the first information. The terminal device according to claim 78, wherein the processing unit is further configured to: determining a DFT vector in the first codebook and/or an inter-polarization phase in the first codebook according to the first information; generating the first codebook according to the DFT vector in the first codebook and/or the inter-polarization phase in the first codebook. A network device, characterized in that it includes: A processing unit, configured to determine the size of the TPMI indication field in the DCI and the length of the DCI according to the first information, the DCI is used to schedule uplink data to be transmitted by the terminal device, and the TPMI indication field is used to carry the first TPMI , the first TPMI is used to indicate the precoding matrix of the uplink data from the first codebook; The processing unit is further configured to generate the DCI according to the size of the TPMI indication field and the length of the DCI; a sending unit, configured to send the DCI to the terminal device, Wherein, the first information includes at least one of the following parameters: the number of antenna ports in the first horizontal dimension, the number of antenna ports in the first vertical dimension, uplink RI constraints, codebook subset constraints, and The number of first DFT vectors, the number of phases between first polarization directions, the offset of DFT vectors between transmission layers, the number of offsets of DFT vectors between transmission layers, the antenna array dimension information of the terminal device, and the The number of beams supported by the terminal device. The network device according to claim 80, wherein the sending unit is configured to send the first information to the terminal device. The network device according to claim 80 or 81, wherein the network device further comprises: a first receiving unit, configured to receive the SRS sent by the terminal device; The processing unit is configured to obtain channel information according to the SRS; and Determine the first information according to the channel information. The network device according to claim 80, wherein the network device further comprises: a second receiving unit, configured to receive terminal capability information of the terminal device; The processing unit is configured to determine according to the first information according to the terminal capability information, where the terminal capability information includes antenna array dimension information of the terminal device and the number of beams supported by the terminal device. The network device according to any one of claims 80-83, wherein the processing unit is configured to: determining the size of the TPMI indication field according to the first information; Determine the length of the DCI according to the size of the TPMI indication field. The network device according to any one of claims 80-84, wherein if the first information includes the number of the first DFT vectors, the number of the first DFT vectors includes the first horizontal dimension DFT The number of vectors L ₁ and the number of DFT vectors in the first vertical dimension L ₂ , and the number of DFT vectors in the first horizontal dimension L ₁ =N ₁ O ₁ , the number of DFT vectors in the second vertical dimension L ₂ =N ₂ O ₂ , where N ₁ represents the number of antenna ports in the second horizontal dimension, O ₁ represents the sampling coefficient in the first horizontal dimension, N ₂ represents the number of antenna ports in the second vertical dimension, and O ₂ represents the sampling coefficient in the first vertical dimension. The network device according to claim 84, wherein if the first information includes the number of antenna ports in the first horizontal dimension and the number of antenna ports in the first vertical dimension, the processing unit is configured to: determining the number of second DFT vectors in the first codebook according to the number of antenna ports in the first horizontal dimension and the number of antenna ports in the first vertical dimension; Determine the size of the TPMI indication field according to the number of the second DFT vectors. The network device according to claim 86, wherein the number of the second DFT vectors includes the number L ₃ of the second horizontal dimension DFT vectors and the number L ₄ of the second vertical dimension DFT vectors, and the second The number of horizontal dimension DFT vectors L ₃ =N ₁ O ₃ , the number of the second vertical dimension DFT vectors L ₄ =N ₂ O ₄ , where N ₁ represents the number of antenna ports in the first horizontal dimension, and O ₃ represents The sampling coefficient of the second horizontal dimension, N ₂ represents the number of antenna ports in the first vertical dimension, and O ₄ represents the sampling coefficient of the second vertical dimension. The network device according to any one of claim 84, wherein the uplink RI constraint is used to indicate the rank that can be indicated in the DCI, and the value of the rank is used to determine the rank that can be indicated in the DCI. TPMI. The network device according to claim 88, wherein if the first information includes the uplink RI constraint, the processing unit is configured to: determining the number of TPMIs available in the first codebook based on ranks available in the first codebook; Determine the size of the TPMI indication field according to the number of TPMIs available in the first codebook. The network device according to any one of claims 80-84, wherein the codebook subset constraint is used to indicate the DFT vectors available in the first codebook, and the available DFT vectors in the first codebook The inter-polarization phase of and one or more parameters in the codewords available in the first codebook. The network device according to any one of claims 80-84, wherein if the first information includes the number of the first DFT vectors, the processing unit is configured to: determining the size of the first codebook according to the number of the first DFT vectors and the number of phases between the second polarization directions; Determine the size of the TPMI indication field according to the size of the first codebook. The network device according to claim 91, wherein if the first information includes the number of phases between the first polarization directions, the number of phases between the second polarization directions is the first the number of phases between polarization directions; Or, the number of phases between the second polarization directions is predetermined. The network device according to claim 84, wherein if the first information includes the number L of the first DFT vectors, the processing unit is configured to: According to the quantity L of the first DFT vector, determine that the number of bits of the DFT vector indication information included in the TPMI indication domain is

The size of the TPMI indication field is determined according to the number of bits of the DFT vector indication information. The network device according to claim 84, wherein if the first information includes the quantity K of phases between the first polarization directions, the processing unit is configured to: According to the quantity K of the phase between the first polarization directions, determine the number of bits of the phase indication information between the polarization directions included in the TPMI indication field as

According to the number of bits of the phase indication information between the polarization directions

Determine the size of the TPMI indication field. The network device according to claim 84, wherein if the first information includes the phase quantity K between the first polarization directions, the processing unit is configured to: Determine the size of the first codebook according to the number of phases between the first polarization directions and the number of third DFT vectors; Determine the size of the TPMI indication field according to the size of the first codebook. The network device according to claim 95, wherein if the first information includes the number of the first DFT vectors, the number of the third DFT vectors is the number of the first DFT vectors; or The number of the third DFT vectors is pre-agreed. The network device according to any one of claims 80-84, wherein the value of the phase between the first polarization directions is [1, q], where q represents the size of a BPSK element, or, q represents the size of a QPSK element, or, q represents the size of an 8PSK element. The network device according to any one of claims 80-97, wherein the offset of the DFT vector between the transmission layers indicates that the index of the DFT vector corresponding to the first transmission layer and the DFT corresponding to the second transmission layer The offset between the indices of the vector. The network device according to any one of claims 80-84, wherein if the first information includes the amount R of the offset of the DFT vector between the transmission layers, the TPMI indication field uses The number of bits occupied by the indication information indicating the offset of the DFT vector between the transmission layers is expressed as

The network device according to any one of claims 80-99, wherein the first information includes multiple parameters, and different parameters correspond to different ranks, or different parameters correspond to Different sets of ranks; or the parameters included in the first information are used for all ranks. The network device according to any one of claims 80-100, wherein the antenna array dimension information includes the number of antenna ports in the horizontal dimension supported by the terminal device and the number of antenna ports in the vertical dimension supported by the terminal device , or, the antenna array dimension information indicates an arrangement manner of the antenna array of the terminal device. The network device according to claim 97, wherein the arrangement of the antenna array of the terminal device includes a horizontal arrangement, a horizontal and vertical two-dimensional arrangement or a four-sided arrangement. The network device according to any one of claims 80-101, wherein the number of beams supported by the terminal device includes the number of horizontal beams supported by the terminal device and/or the number of vertical beams supported by the terminal device Number of beams. The network device according to any one of claims 80-103, wherein if the DCI is coded jointly with rank indication RI and TPMI, the TPMI information indication field also carries the first RI. The network device according to any one of claims 80-104, wherein the first codebook is determined according to the first information. The network device according to any one of claims 80-105, wherein the first information is used to determine the index of the target DFT vector in the first codebook and/or the phase between target polarization directions . A terminal, characterized by comprising a memory and a processor, the memory is used to store programs, and the processor is used to call the programs in the memory to execute the method described in any one of claims 1-26 method. A network device, characterized by comprising a memory and a processor, the memory is used to store a program, and the processor is used to call the program in the memory to execute any one of claims 27-53 Methods. An apparatus, characterized by comprising a processor, configured to call a program from a memory to execute the method according to any one of claims 1-26. An apparatus, characterized by comprising a processor, configured to call a program from a memory to execute the method as claimed in any one of claims 27-53. A chip, characterized by comprising a processor, configured to call a program from a memory, so that a device installed with the chip executes the method according to any one of claims 1-26. A chip, characterized by comprising a processor, configured to call a program from a memory, so that a device installed with the chip executes the method according to any one of claims 27-53. A computer-readable storage medium, characterized in that a program is stored thereon, and the program causes a computer to execute the method according to any one of claims 1-26. A computer-readable storage medium, characterized in that a program is stored thereon, and the program causes a computer to execute the method according to any one of claims 27-53. A computer program product, characterized by comprising a program, the program causes a computer to execute the method according to any one of claims 1-26. A computer program product, characterized by comprising a program, the program causes a computer to execute the method according to any one of claims 27-53. A computer program, characterized in that the computer program causes a computer to execute the method according to any one of claims 1-26. A computer program, characterized in that the computer program causes a computer to execute the method according to any one of claims 27-53.

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